Patent Application
20230304278
Various embodiments are described herein that relate generally to various aspects of portable, permanent and/or semi-permanent structures including, but not limited to, shipping containers, and various types of dwellings including medical units such as, but not limited to, portable intensive care units (ICUs), operating rooms (ORs), step down or isolation rooms, long-term care units, and other segregated isolation chambers, and systems thereof as well as non-medical uses.
The following paragraphs are provided by way of background to the present disclosure. They are not, however, an admission that anything discussed therein is prior art or part of the knowledge of persons skilled in the art.
Portable structural units can be helpful in providing temporary structures during times of need. For example, when the portable structural unit is a mobile medical unit such as, but not limited to, mobile intensive care units (ICUs) or operating rooms (ORs), such mobile structures can be useful for field medical operations, and for expanding the capacity of a permanent hospital location to enable health care workers to respond to unplanned increases in patient loads.
However, various practical matters are not addressed in the prior art for certain portable, semi-permanent and permanent structures. For example, while these conventional portable structures are promoted for being rapidly deployable, this appears to stem solely from the fact that they are portable, and they may not be versatile for use in different situations. However, some of these structures do not include airflow systems or if they do include airflow systems, they are rudimentary and are not versatile.
Furthermore, the prior art does not disclose any formats, techniques or materials that are for maximizing the amount of interior volume that is usable for personnel, beds, air handling, medical equipment and utilities when the space is somewhat limited in a portable or semi-permanent structure. Standard interior wall construction materials and techniques that are in common use for larger spaces reduce in greater proportion the usable interior volume in smaller spaces.
Disclosed here are generally various configurations of portable modular units including semi-permanent units, systems including multiple portable units, various aspects of physical, electrical and/or communications interconnections between different the portable units in such a system. In another aspect, certain embodiments describe various techniques and materials usable for construction of the portable units. Some of the teachings herein are also applicable to permanent structures. Examples of portable, semi-permanent and permanent structures to which at least some of the teachings herein pertain include various structures such as, but not limited to, shipping containers and various types of dwellings including medical units such as, but not limited to, portable intensive care units (ICUs), operating rooms (ORs), step down or isolation rooms, long-term care units, and other segregated isolation chambers, as well as non-medical uses.
In one broad aspect, in accordance with the teachings herein, there is provided at least one embodiment of structure that is portable, permanent or semi-permanent, wherein the structure comprises a housing defining a room therein; and an air flow system that is coupled to the room for providing conditioned air thereto, the air flow system including components located in a maintenance room adjacent to the room and components located exterior to the maintenance room, the air flow system being configured to controllably transition the at least one room between an positive air pressure configuration, a neutral air pressure configuration and a negative air pressure configuration relative to an environment that is external to the housing.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a wall panel system for a structure, wherein the wall panel system comprises at least one wall panel having a panel comprising: a front surface and a rear surface opposite the front surface; a right side surface and a left side surface opposite the front surface; a lateral interlock system comprising a first lateral interlock interface that is disposed at the right side surface and a second lateral interlock interface that is disposed at the left side surface, each of the first and second lateral interlock interfaces comprising at least one lateral interface component; wherein the at least one lateral interface component of the first or second lateral interlock interface of the at least one wall panel is oriented to slidably engage at least one lateral interface component of a corresponding interlock interface of an adjacent wall panel to connect the at least one wall panel and the adjacent wall panel in a co-planar fashion to form a larger wall section.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a mobile medical unit comprising: a housing provided by a shipping container or portion thereof; a first room in the housing, the first room being a patient chamber; and an air flow system that is coupled to the room for providing conditioned air thereto and configuring the room to transition between any one of a positive air pressure configuration, a neutral air pressure configuration or a negative air pressure configuration relative to an environment that is external to the housing.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a compound structure comprising: a first shipping container; and a second shipping container, at least one opening that is common to both containers; and a seal that is disposed about the at least one opening; wherein the first and second shipping containers are coupled to one another such that the at least one openings are aligned and the first and second shipping containers are urged together during coupling to provide a pressure seal around the at least one opening.
In another aspect, in accordance with the teachings herein, any of the structures or compound structures described herein may be used as a medical structure including a patient chamber, an OR, an ICU, or a nurses station, a pharmacy, an educational structure including a classroom and/or a portable, a military structure, a correctional facility, a penitentiary structure, a testing and vaccination centre, a quarantine facility, a modular laboratory structure, a cleanroom, a long-term care facility, a natural disaster safe shelter, an indigenous community housing structure, a vertical farming structure, a grow room, a clean room, a mobile restaurant, a mobile bar, a cottage, a retail structure, a mining structure, a modular housing structure, a social housing structure or a remote community structure.
Other features and advantages of the present application will become apparent from the following detailed description taken together with the accompanying drawings. It should be understood, however, that the detailed description and the specific examples, while indicating preferred embodiments of the application, are given by way of illustration only, since various changes and modifications within the spirit and scope of the application will become apparent to those skilled in the art from this detailed description. For example, aspects described and depicted herein may be more generally applicable to fixed (i.e., immobile) constructions.
For a better understanding of the various embodiments described herein, and to show more clearly how these various embodiments may be carried into effect, reference will be made, by way of example, to the accompanying drawings which show at least one example embodiment, and which are now described. The drawings are not intended to limit the scope of the teachings described herein.
Further aspects and features of the example embodiments described herein will appear from the following description taken together with the accompanying drawings.
The headings and Abstract of the Disclosure provided herein are for convenience only and do not interpret the scope or meaning of the embodiments.
Various embodiments in accordance with the teachings herein will be described below to provide an example of at least one embodiment of the claimed subject matter. No embodiment described herein limits any claimed subject matter. The claimed subject matter is not limited to devices, systems, or methods having all of the features of any one of the devices, systems, or methods described below or to features common to multiple or all of the devices, systems, or methods described herein. It is possible that there may be a device, system, or method described herein that is not an embodiment of any claimed subject matter. Any subject matter that is described herein that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicants, inventors, or owners do not intend to abandon, disclaim, or dedicate to the public any such subject matter by its disclosure in this document.
It will be appreciated that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the embodiments described herein. Also, the description is not to be considered as limiting the scope of the embodiments described herein.
It should also be noted that the terms “coupled” or “coupling” as used herein can have several different meanings depending in the context in which these terms are used. For example, the terms coupled or coupling can have an electrical, mechanical or structural connotation. For example, as used herein, the terms coupled or coupling can indicate that two elements or devices can be directly connected to one another or connected to one another through one or more intermediate elements or devices via an electrical signal, an electrical connection, a mechanical element, a structural element or an airflow depending on the particular context.
Unless the context requires otherwise, throughout the specification and claims which follow, the word “comprise” and variations thereof, such as, “comprises” and “comprising” are to be construed in an open, inclusive sense, that is, as “including, but not limited to”.
It should also be noted that, as used herein, the wording “and/or” is intended to represent an inclusive-or. That is, “X and/or Y” is intended to mean X or Y or both, for example. As a further example, “X, Y, and/or Z” is intended to mean X or Y or Z or any combination thereof.
It should be noted that terms of degree such as “substantially”, “about” and “approximately” as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. These terms of degree may also be construed as including a deviation of the modified term, such as by 1%, 2%, 5%, or 10%, for example, if this deviation does not negate the meaning of the term it modifies.
Furthermore, the recitation of numerical ranges by endpoints herein includes all numbers and fractions subsumed within that range (e.g., 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.90, 4, and 5). It is also to be understood that all numbers and fractions thereof are presumed to be modified by the term “about” which means a variation of up to a certain amount of the number to which reference is being made if the end result is not significantly changed, such as 1%, 2%, 5%, or 10%, for example.
Reference throughout this specification to “one embodiment”, “an embodiment”, “at least one embodiment” or “some embodiments” means that one or more particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, unless otherwise specified to be not combinable or to be alternative options.
As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the content clearly dictates otherwise. It should also be noted that the term “or” is generally employed in its broadest sense, that is, as meaning “and/or” unless the content clearly dictates otherwise.
The example embodiments of some of the devices, systems, or methods described in accordance with the teachings herein are generally implemented as a combination of hardware and software. For example, the embodiments described herein may be implemented, at least in part, by using one or more computer programs, executing on one or more programmable devices comprising at least one processing element and at least one storage element (i.e., at least one volatile memory element and at least one non-volatile memory element). The hardware may comprise input devices including at least one of a touch screen, a keyboard, a mouse, buttons, keys, sliders, and the like, as well as one or more of a display, a printer, one or more sensors, and the like depending on the implementation of the hardware.
It should also be noted that some elements that are used to implement at least part of the embodiments described herein may be implemented via software that is written in a high-level procedural language such as object-oriented programming. The program code may be written in C++, C #, JavaScript, Python, or any other suitable programming language and may comprise modules or classes, as is known to those skilled in object-oriented programming. Alternatively, or in addition thereto, some of these elements implemented via software may be written in assembly language, machine language, or firmware as needed. In either case, the language may be a compiled or interpreted language.
At least some of these software programs may be stored on a computer readable medium such as, but not limited to, a ROM, a magnetic disk, an optical disc, a USB key, and the like that is readable by a device having a processor, an operating system, and the associated hardware and software that is necessary to implement the functionality of at least one of the embodiments described herein. The software program code, when read by the device, configures the device to operate in a new, specific, and predefined manner (e.g., as a specific-purpose computer) in order to perform at least one of the methods described herein.
At least some of the programs associated with the devices, systems, and methods of the embodiments described herein may be capable of being distributed in a computer program product comprising a computer readable medium that bears computer usable instructions, such as program code, for one or more processing units. The medium may be provided in various forms, including non-transitory forms such as, but not limited to, one or more diskettes, compact disks, tapes, chips, and magnetic and electronic storage. In alternative embodiments, the medium may be transitory in nature such as, but not limited to, wire-line transmissions, satellite transmissions, internet transmissions (e.g., downloads), media, digital and analog signals, and the like. The computer useable instructions may also be in various formats, including compiled and non-compiled code.
In accordance with the teachings herein, there are provided various configurations of portable, semi-permanent or permanent units as well as various techniques and materials usable for construction of these units. The following description and drawings set forth embodiments in which the portable units are portable medical units constructed based on intermodal/shipping containers. However, many aspects described and depicted herein are generally applicable to portable units being constructed using other materials and/or for other applications. Furthermore, aspects described and depicted herein may be more generally applicable to portable, semi-permanent or fixed (i.e., immobile or permanent) constructions.
For example, various embodiments of an air control system and associated control methods are described herein that generally apply to a structure having a room, with it not necessarily being a medical room. Furthermore, while the description provides examples in which the teachings herein are applied to a portable structure, which in this case is a mobile medical unit having a room that is a patient chamber, examples of other applications in which the teachings herein can be applied include other types of structures such as, but are not limited to, educational structures including classroom portables, military structures, correctional facilities, penitentiary structures, testing and vaccination centres, quarantine facilities, modular laboratory structures, cleanrooms, long-term care facilities, natural disaster safe shelters, indigenous community housing, vertical farming, grow rooms, clean rooms, mobile restaurants, mobile bars, cottages, retail structures, mining structures, modular housing, social housing and remote communities, for instance.
Furthermore, at least some of the teachings herein may be adapted for and generally applicable to fixed (i.e., immobile) constructions such as, but not limited to, fixed infrastructure for hospitals and medical clinics, educational structures including classroom portables, military structures, correctional facilities, penitentiary structures, testing and vaccination centres, quarantine facilities, laboratory structures, cleanrooms, long-term care facilities, natural disaster safe shelters, indigenous community housing, vertical farming, grow rooms, clean rooms, mobile restaurants, mobile bars, cottages, retail structures, mining structures, modular housing, social housing and remote communities, for instance.
It has been realized by the inventor that there may be various applications, for mobile, portable, semi-permanent or permanent structures, such as, for example, medical applications which may require that a particular room or chamber, such as a patient room, an ICU or an OR unit, which may be directly connected to outside air or to another structure, be controllably maintained at either a positive air pressure (i.e., a higher pressure than ambient pressure), a negative air pressure (i.e., a lower air pressure than ambient pressure) or a neutral air pressure (i.e. at the same air pressure as ambient pressure). For example, negative pressure may be used for ICUs where there is an airborne illness or where aerosol-generating procedures such as intubation are being done to decrease viral load. Positive pressure may be used for some OR (e.g., surgical) procedures to ensure airborne pathogens do not contaminate the patient or supplies in the chamber. With a chamber that is at positive air pressure, contaminants (e.g., virus containing air, particles, and droplets) that may be present at the exterior of the chamber are generally kept, due to the pressure differential between the interior and exterior of the chamber, from seeping into the interior of the chamber, with the exception of air that is deliberately conveyed into the interior of the chamber via ducts and filtration equipment. With a chamber that is at negative air pressure, the contaminants that may be present in the interior of the chamber are generally kept, due to the pressure differential, from seeping to the exterior of the chamber, again with the exception of air that is deliberately conveyed out of the interior of the chamber via ducts and filtration equipment.
In another aspect, in accordance with the teachings herein, there is described at least one embodiment of a controllable airflow system for a structure, which may be mobile/portable, semi-permanent or permanent, that can be controlled to render an enclosed chamber that is in the structure and with which the controllable airflow system is associated and may be controlled to transition air pressure in the chamber so that the chamber is a positive pressure chamber, a negative pressure chamber, or a neutral pressure chamber.
In another aspect, in accordance with the teachings herein, there is described at least one embodiment of a method of controlling a controllable airflow system to maintain a chamber at negative pressure but to modify the amount of negative pressure with respect to ambient pressure, and/or to maintain a chamber at positive pressure but to modify the amount of positive pressure with respect to ambient pressure.
Ambient pressure is generally defined as being the pressure that surrounds an object. For example, ambient pressure may be the pressure of the environment that surrounds the room whose pressure is being controlled to be a positive pressure, negative pressure or neutral pressure with respect to its surrounding environment. In some cases, the ambient pressure may be the outside open-air environment. In at least some cases, the ambient pressure may be at about 1 atmosphere or about 101.3 kPa. The surrounding environment depends on the nature of the chamber. For example, a room or chamber may be part of a mobile, semi-permanent or permanent structure where the chamber is directly vented to receive air flow from and provide air flow to the outside environment (e.g., atmosphere). Alternatively, the room or chamber may be part of a mobile/portable, semi-permanent or permanent structure where the chamber is vented to receive air flow from and provide air flow to another structure, such as another room, a hallway or the HVAC system of a larger structural environment.
It should be understood that the word chamber and room, as used herein, may be used synonymously in that they both represent a unit or sub-structure with air pressure that is controllable by an air flow control system to be changeable between being at positive air pressure, negative air pressure or neutral air pressure relative to an outer environment of the chamber/room.
It should also be understood herein that the words portable and mobile may be used synonymously and interchangeable in that they both represent a structure or unit that may be moved from one location to another location or may be a temporary structure that can be assembled at a first location, and then be disassembled and the parts moved to a second location where it is reassembled.
In another aspect, in accordance with the teachings herein, portable, semi-permanent or permanent structures may be provided with an example embodiment of a flexible airflow control system that enables a given unit, or an individual chamber in a multi-chamber mobile unit, to operate selectively and independently, from other rooms or chambers, such that it can be independently transitionable to any one of a negative pressure chamber, a positive pressure chamber, and a neutral pressure chamber. For example, with such a control system, the airflow in a given mobile unit, or an individual chamber of a multi-chamber unit, is controllable and changeable between any two of positive, negative and neutral pressure environments. The present application describes example embodiments of systems and methods for conditioning the air and also controlling the pressure in the chamber for some use or patient requiring pressure conditions that are different than that which existed during a previous use of the same chamber.
Furthermore, in another aspect of the teachings herein, in at least one embodiment, semi-permanent or permanent structures may have a first individual chamber/room of a multi-chamber unit/room structure operating as a negative pressure chamber while another individual chamber of the multi-chamber unit/structure is operating independently as either a positive pressure chamber or a neutral pressure chamber. In such embodiments, a common air flow control system or separate air flow control systems may be used for the separate chambers whose pressure is to be controlled independently from other chambers.
Furthermore, in another aspect of the teachings herein, at least one embodiment of an air control system is provided herein in which the air pressure of an individual chamber of a multi-chamber unit/structure is independently controlled so that it can be changed between negative, positive and neutral pressure while the air pressure of another individual chamber of the multi-chamber unit/structure is being controlled to be held steady at, or changed between, positive, negative, or neutral pressure.
Furthermore, in another aspect, in accordance with the teachings herein, there is provided at least one embodiment of an air flow control system for use with portable, semi-permanent or permanent structures that controls the air pressure of an individual chamber of a multi-chamber mobile unit/structure is controllable, either automatically or under user control, to provide various positive pressures thereby to maintain a positive pressure within such chambers while also enabling control over whether the positive pressure is increased or decreased or to control the air pressure in such chambers to provide various negative pressures to maintain a negative pressure within a chamber while also enabling control over whether the negative pressure is increased or decreased.
Furthermore, in another aspect, in accordance with the teachings herein, there is provided at least one embodiment in which substantially fluid-tight connections between two or more physically combined mobile units are used, with the connections being automatically resilient to pressure conditions in a mobile unit, or an individual chamber of a multi-chamber unit, being changed between negative, positive, and neutral pressures.
In another aspect, the teachings herein can be applied to the assembly of various individual units, which may be mobile medical units, anteroom modules, hallway modules, connection modules, pharmacy modules and/or nurse station modules, for example, so that these units can be combined into various configurations of compound structures useful for forming particular custom and scalable configurations such as, but not limited to, multiple-bed hospital and ICU and OR medical units.
Referring now to
The shipping container 102 has been fitted with a fluid-tight wall splitting the container 102 into two halves. Each half of the unit 100 has respective patient chambers 104a, 104b, and respective maintenance rooms 106a, 106b. In this example embodiment, each patient chamber 104a, 104b is provided with two windows for, in turn, providing the patients in each chamber with a sense of the environment outside of the respective patient chambers 104a, 104b. Alternatives in window configuration (more or fewer windows, or differently sized windows) are possible. In at least one embodiment, the windows may be openable only by the use of a tool/keys. In at least one alternative embodiment, the windows may be permanently sealed. Maintenance rooms 106a, 106b house equipment comprising airflow systems 108a, 108b, respectively, which include, but are not limited to conduits and filtration. Each maintenance room 106a, 106b also houses electrical, gas and other operational and medical components for handling conditions and capabilities within the respective patient chamber 104a, 104b, as will be described. Each maintenance room 106a, 106b is also physically and fluidically coupled with HVAC equipment.
In this example embodiment, each maintenance room 106a, 106b is only accessible via a respective door 102md1, 102md2 from outside of the unit 100, and not via the respective patient chamber 104a, 104b itself. The HVAC equipment associated with each maintenance room 106a, 106b includes, in this example embodiment, components for heating, ventilation, air conditioning and humidity control. In other embodiments, other components may be included in the maintenance rooms.
The HVAC equipment is housed in a respective box 109a, 109b that is positioned beside the maintenance room door 102md2 at the exterior of the unit 100, so that it may be maintained or repaired without personnel necessarily having to enter into the maintenance rooms 106a, 106b. In this example embodiment, the HVAC equipment provides a high latent capacity humidity and sound reduction for removing high amounts of humidity, a 24,000 BTUH rated cooling capacity, and a 34,130 BTUH rated heating capacity. The HVAC equipment may include a BARD 11EER Single Stage Dehumidification W24HBD_W36HBD HVAC unit. Furthermore, to reduce costs in maintenance, a hydrophilic evaporator coil may be incorporated. Such a coil is useful for reducing or preventing mold growth, aiding with drainage, and for protecting components against corrosive particulates that may be in the incoming airstream. However, in other embodiments other types of HVAC equipment may be used.
Referring now to
Similarly, airflow systems 108a, 108b comprise air outlet subsystems 112a, 112b that are positioned below the respective HVAC equipment box 109a, 109b to convey air from the interior of the chambers 104a, 104b of the unit 100 out to its exterior. Air outlet subsystems 112a, 112b direct air being expelled downwards from a point that is a certain distance above the ground such as, but not limited to, about 10 inches, for example, to the exterior of the container 102. The handling of air intake, filtration, conditioning and expulsion, is described in further detail below.
In at least one embodiment, the outlets of the air outlet subsystems 112a, 112b may be positioned so that they are a certain distance from ventilation intakes or occupied areas such as at least about 10 ft, for example.
In general, it is preferable, if possible, to have the airflow of clean air move towards the patient and then move from the patient to the exhaust in as short a route as possible. Thus, in at least one embodiment, the air outlet subsystems 112a, 112b may be located near the floor close to the bed, with the inlet of the air outlet subsystems 112a, 112b being located possibly about 6 inches to 1 foot above the floor.
In at least one embodiment, the exhaust ducts (e.g., air outlets) of the air outlet subsystems 112a, 112b may be oversized to allow for loss of efficiency, e.g., expected airflow plus 50%.
In this example embodiment, each patient chamber 104a, 104b is only accessible via a respective door 102d1, 102d2 from outside of the unit 100. In this embodiment, these doors 102d1, 102d2 do not include windows. As such, the patients may be monitored using one or more closed circuit cameras that are positioned throughout each patient chamber 104a, 104b and in communication with video monitors that are located outside of the patient chambers 104a, 104b. However, in alternative embodiments windows may also be included in these doors 102d1, 102d2 to enable those just outside the doors 102d1, 102d2 to observe a patient within the patient chamber 104 without necessarily having to consult video monitors.
In alternative embodiments, it should be noted that the doors 102d1, 102d2 may instead lead to an ante-chamber or a hallway when the mobile medical unit 102 is part of a larger portable, semi-permanent or permanent structure, examples of which are later discussed.
In various embodiments, there may be a ½ inch gap under the doors 102d1, 102d2.
As can be seen in
Referring to
The processor unit 124 controls the operation of the air pressure control system 114 and may include one processor that can provide sufficient processing power depending on the configuration and operational requirements of the system 114. For example, the processor unit 124 may include a high-performance processor. The display 132 may be an LCD display.
The control interface 128 may be any hardware element that allows the processor unit 124 to communicate with elements within the air pressure control system 114, the air inlet subsystem 112 or the air outlet subsystem 114. For example, the interface unit 128 include at least one of a serial bus or a parallel bus, and a corresponding port such as a parallel port, a serial port, and/or a USB port. The control interface 128 may also include one or more Analog to Digital converters (ADCs) or a multichannel ADC when digital signals from the processor unit 124 are provided to analog components within the air inlet subsystem 112 or the air outlet subsystem 114. The control interface 128 may also include one or more Digital to Analog converters (DACs) or a multichannel DAC when analog signals from the air inlet subsystem 112 or the air outlet subsystem 114 are sent to the processor unit 124.
In at least one embodiment, one or more elements of the control interface 128 may be located so that they are not within reach of the patient, visitors, or any other members of the public, as the case may be, so that un-authorized people are not allowed to vary the operation of the air pressure control system 114. For example, one or more elements of the control interface may be key operated, and the keys may usually be locked, in a secure environment, such as a cupboard or a desk drawer, or the control means for controlling the operation of the air pressure control system 114 may be only accessible remotely by authorized personnel.
In embodiments where the input interface 120 allows the processor unit 124 to communicate with remote computing devices, a network port may be used so that the processor unit 144 can communicate via the Internet, a Local Area Network (LAN), a Wide Area Network (WAN), a Metropolitan Area Network (MAN), a Wireless Local Area Network (WLAN), a Virtual Private Network (VPN), or a peer-to-peer network, either directly or through a modem, router, switch, hub or other routing or translation device.
In some cases, the input interface may alternatively or additionally include various communication hardware for allowing the processor unit 124 to communicate with remote devices. For example, the communication hardware may include, a Bluetooth radio or other short range communication device, or a wireless transceiver for wireless communication, for example, according to CDMA, GSM, or GPRS protocol using standards such as IEEE 802.11a, 802.11b, 802.11g, or 802.11n.
The memory 126 stores program instructions for an operating system and an airflow control program 126p. When the program instructions for the airflow control program 126p are executed by a processor of the processor unit 124, the processor is configured for performing certain functions in accordance with the teachings herein. For example, the airflow control program 126p may include software instructions for generating a graphical user interface (GUI) on the display 132 and receiving input from a user who interacts with the GUI to set an air pressure configuration for room 104a,104b. Alternatively, the airflow control program 126p may include software instructions for allowing the processor unit 124 to communicate with remote devices that a user may use to set an air pressure configuration for rooms 104a,104b. The airflow control program 126p also includes software instructions for causing the processor unit 124 to send control signals to the dampers 118 to control the valve position thereof, as described in further detail below. This may be referred to as electronic damper control. Alternatively, in embodiments in which the HEPA filter unit 116 has a variable drive system, the dampers 118 are not included and the airflow control program 126p includes software instructions for causing the processor unit 124 to send control signals to the HEPA filter 116 to control the speed of the variable drive system, as described in further detail below. Therefore, in either of these embodiments, the air pressure control system 114 may be considered to function as a master controller that is configured to change the air pressure using multiple HEPA systems to cause differential pressure between the inlet air and exhaust air of the inlet air and outlet air subsystems respectively. This can do in some embodiments mechanically by using dampers within the ducting or in other embodiments electrically by changing the speed (e.g., RPM of the motor) of each HEPA system that have a variable drive system. In addition, the air pressure control system 114 may also be used to concurrently condition the air by, for example, controlling the HVAC to cool or warm the air that is provided to the room 104a, 104b.
As can be seen in
In at least one embodiment, the pressure indicator 120 may be configured to provide a notification, which may be instant, if the pressurization within the chambers 104a, 104b fails or fluctuates too much. This may be done by measuring the pressure within the chambers 104a, 104b using pressure sensors, comparing the measured pressures to a predefined pressure threshold or a rate of change of room pressure to a predefined pressure rate change threshold and sending control signals to the pressure indicator 120 to indicate when the measured pressure is above or below the predefined threshold (depending on the air pressure configuration for the chambers 104a, 104b) or when the rate of change of the measured pressure is above the predefined pressure rate change threshold. The pressure sensors may be implemented so that they can measure changes in pressure of about 0.01 WC.
In at least one embodiment, there may be a visual alarm when the pressure indicator 120 is controlled to display that there is a problem with pressure in the chambers 104a, 104b, and/or there may be an audible alarm that is generated as well. The audible alarm and the pressure indicator 120 may be controlled to stop and not indicate a pressure problem when the pressure within the chambers 104a, 104b is restored to its desired operational value.
In general, the chambers 104a, 104b are “well-sealed”, which this includes applying sealing to the ceiling panels and the regions where the ceiling panels meet the wall panels. For example, acoustic ceiling tiles may be replaced with non-porous vinyl ceiling tiles and gaskets can be applied at the tile connections in the ceiling grid. A sealant, such as a medical grade sealant that is able to withstand changes in room pressure, may be applied in between each ceiling panel. In at least one embodiment, each ceiling tile may be fastened to one another (e.g., riveted to one another) for extra strength to withstand changes in room pressure during use. Gaskets may be also provided around items which are used to enter into the room as well as for other objects that are installed in the walls such as, e.g., electric sockets, gas supplies, phone lines, etc. In addition, recessed light fixtures may be replaced with surface-mounted fixtures.
In at least one embodiment, there may also be ceiling cavities 104ac, 104bc (see
For example, in at least one embodiment, the cavities 104ac, 104bc may include further ducting from outlets of the HVAC systems 109a, 109b (that is at a different location compared to what is shown in
In this example embodiment, headwall units 105a, 105b extend from both sides of the middle wall 103. The middle wall 103 may be structurally designed, such that it is foam sealed and fastened to each side wall of the container 102 using angle formed strips around the entire perimeter, on both side walls and at the ceiling and floor of the container 102, thereby to provide strength for a headwall unit 105a, 105b at this position for each of the patient chambers 104a, 104b as shown in
In this example embodiment, the headwall units 105a, 105b, 107a, 107b and other outlets within the mobile medical unit 100 may be furnished with medical grade electrical components, including gas piping certified to Canadian, American and/or international medical standards, three (3) oxygen ports, one (1) medical gas port, and three (3) suction ports. Also provided are six (6) 120V, 15 Amp duplex hospital-grade receptacles, and two (2) 120V, 20 Amp duplex hospital-grade receptacles, each with GFCI circuitry, as well optionally one or more phone line outlets and optionally a television connection. The number and type of ports can vary depending on the type of room or based on different construction standards that exist for different jurisdictions (e.g., states or countries). The headwall units 105a, 105b can also be implemented to provide areas for affixing medical devices such as monitors, for example. For the headwall unit 105a, 105b, medical grade gas may be routed using pipes above the ceiling of the chambers 104a, 104b in ceiling cavities 104ac and 104bc, where these pipes are connected to gas sources.
Though not shown in
In order to provide electrical utilities to the unit 100, the unit 100 is capable of a 208 Volt, 50-Ampere connection via a manual transfer switch with, in this example embodiment, connections for connecting to a backup generator. In alternative embodiments, the power connections may have another power capacity depending on the type of room and/or the type of construction standards that exist for different jurisdictions (e.g., states or countries). In at least one embodiment, the unit 100 may further comprise at least one solar cell, one or more wind turbines, an electric generator, electric vehicles or other renewable or non-renewable electricity sources to provide electrical utilities to the mobile medical unit 100. In at least one embodiment, the unit 100 may further incorporate an electrical distribution system that incorporates or can connect with an uninterrupted power supply (UPS) for ensuring that power continues to be routed to key receptacles in the event of a municipal or facilities power failure. In at least one embodiment, each unit may be outfitted with an automated transfer switch that may automatically actuate in the event of municipal power failure. Alternatively, power to the unit 100 may be provided by alternate power sources such as renewable or non-renewable energy sources including, but not limited to, solar, wind, electric, natural gas, diesel, turbine and electric vehicles through a bi-directional charging station.
The floor of each patient chamber 104a, 104b, in this example embodiment, may be clad with medical-grade polyurethane flooring such as the medical-grade Polyclad Pro PU available from Polyflor Limited in the United Kingdom. Alternative formats or suppliers of flooring that comply with required quality and safety standards may be employed. In this at least one example embodiment, the flooring may feature a raised perimeter running six (6) inches up the walls, providing a floor-to-wall barrier to dirt, fluids and other contaminants. The flooring may be, in at least one embodiment, suitable for use in ISO1466-11999 Class 4 clean rooms, and may be classified as a Class A product, including non-shedding to ASTM F51, complying with CAN/ULC-S102.2. Alternative formats for the flooring and/or suppliers of flooring that comply with quality and safety standards that apply to the structure that the chambers 104a, 104b are used with may be employed in alternative embodiments. In at least one embodiment, the mobile unit 100 may have a floor made of structural steel.
It should be noted that the structural elements used for the walls, floors, roofing structures and ceiling panels described herein can be made using any suitable material. In at least one example embodiment, the materials that may be used include carbon-based thermoplastics.
Referring now to
Because the HEPA filter unit 116a1, 116b1 delivers a steady volume of air through the ducting system, reductions in air flow exiting the HEPA filter unit 116a1, 116b1 below a predefined threshold can signify the HEPA filter unit 116a1, 116b1 needs service, such as a filter change or more involved service such as electrical or mechanical work. Since airflow and filtration of airflow affect the quality of air and the pressure within the chambers 104a, 104b, in this example embodiment, an air-flow meter 134 (see
In addition, in at least one embodiment, the air-flow meter 134 may be placed in the ducts associated with the HVAC equipment 109a, 109b to raise an alarm whenever airflow in the HVAC equipment 109a, 109b drops below a threshold level. Such airflow meters 134 also serve to provide an alert to personnel if power to the mobile medical unit 100 is cut off, since a power cut will also result in the cut off of threshold amounts of airflow to and from the mobile medical unit 100.
This filter-motor units 116a1, 116b1 are controlled by the air control system 114 to run at a steady rate. However, fresh air drawn in by the filter-motor units 116a1, 116b1 reaches a first damper unit 118a1, 118b1 (damper 1) which itself is controlled to provide greater or lesser damping thereby to enable incoming air to continue downstream from the damper unit 118a1, 118b1 with some amount of air volume damping or without. Air exits the damper unit 118a1, 118b1 at a location adjacent to the return vent 113a, 113b, but inside the maintenance room of the patient chambers 104a, 104b so that it is conveyed towards the HVAC equipment 109a, 109b for conditioning by heating, cooling and/or humidity treatment.
Once conditioned by the HVAC equipment 109a, 109b, the air is conveyed out of the inlet vent 111a, 111b and along the top of the patient chamber 104a, 104b. This air then mixes with air that is already in the patient chamber 104a, 104b. Upon reaching the middle wall 103, the air doubles back towards the middle of the patient chamber 104a, 104b. By conveying the air initially along the top of the patient chamber 104a, 104b, it is not directed at any medical personnel or patients. As depicted in
This design is advantageous as the portion of air that doubles back and re-enters the HVAC 109a, 109b can be mixed together with the air from the filtered air from the HEPA filter units 116a1, 116b1 which was initially from the inlets 115a, 115b which acts to condition the filtered air and the mixture can then be conditioned by the HVAC units 109a, 109b before it exits via the vents 111a, 111b towards the rooms 104a, 104b. Due to this mixing of air that is already “conditioned” or treated (e.g. either heated or cooled) with the newly filtered air, the HVAC units 109a, 109b do not have to work as hard to condition this newly filtered inlet air. Accordingly, this allows for smaller size HVAC units 109a, 109b to be used which is important given the portable nature and smaller size of the containers 102 which provide a housing for the rooms 104a,1104b where the smaller size limits the components that are used.
However, some of the air doubling back falls towards the bottom of the patient chamber 104a,104b and is drawn out of the patient chamber 104a, 104b by air outlet subsystem 112a, 112b at a predefined outlet rate. The air outlet subsystem 112a, 112b comprises a second filter-motor unit 116a2, 116b2, and a second damper unit 118a2, 118b2 (damper 2). In this example embodiment, the second filter-motor unit 116a2, 116b2 may also be a HEPA unit rated at about 245 CFM, to filter air before it is expelled outside of the mobile medical unit 100. The HEPA filter unit 116a2, 116b2 is being controlled by the air control system 114 to run at a steady rate. However, the second damper unit 118a2, 118b2 is controlled to provide greater or lesser damping thereby to enable exiting air to continue downstream from the damper unit 118a2, 118b2 with some amount of damping or without, so as to control the outlet rate and therefore the pressure within the rooms 104a, 104b.
However, in at least one embodiment, the return air vent to the HVAC system can be closed so that no air will re-circulate back through the HVAC system. In such embodiments, the HEPA system that receives fresh air may be sized to feed sufficient airflow into the return duct, thus allowing for a 100% air exchange.
As shown in
In an alternative embodiment, the HEPA units, HVAC system or other airflow components can be placed in other locations, such as other parts of the shipping container housing, provided that the airflows shown in
Referring now to
Referring to
Preferably, in at least one embodiment, the damper units 118a1, 118a2, 118b1, 118b2 incorporate electrically controllable damper blades that can be electrically adjusted to increase or decrease the damping. In this way, the air control system 114 can centrally control the electrically controllable damper blades in response to a user-initiated instruction, or in response to detecting feedback from one or more pressure sensors.
In such embodiments, the air control system 114 can provide a user with control over whether patient chamber 104a, 104b is operating as a negative pressure chamber, a positive pressure chamber, or as a neutral pressure chamber as well as transitions between any of two of these pressure conditions, regardless of the ambient pressure outside of the chambers 104a, 104b, by controlling the airflow into and out of the chambers 104a, 104b.
For example, one of the chambers 104a, 104b may be operated as an ICU in which case a negative air pressure configuration may be selected. At another time, one of the chambers 104a, 104b may be operated as an OR in which case a positive air pressure configuration may be selected. In another alternative, one of the chambers 104a, 104b may be operated as an ICU with a negative air pressure configuration while at the same time the other chamber may be operated as an OR with a positive air pressure configuration or used for other purposes and be at a neutral air pressure configuration.
For example, if the user wishes for the patient chamber 104a to maintain a negative air pressure, the air control system 114 can be instructed/controlled to control the valves of dampers 118a1 and 118a2 so that a higher CFM of air is being conveyed out of the patient chamber 104a than is being conveyed into it (i.e., the outlet rate is greater than the inlet rate). In particular, damper 118a1 may be angled to permit passage of air at a first airflow rate, such as only about 170 CFM), while damper 118a2 is angled to permit passage of air at a second airflow rate which is larger than the first airflow rate and so the second airflow rate may be about 245 CFM. Various levels of inlet and outlet flows may be achieved, while still maintaining the patient chamber 104a at a negative air pressure with respect to the ambient pressure. This may be done by controlling the airflow system 108a to change the relative incoming flow rate (i.e., inlet rate) and the outgoing flow rate (i.e., outlet rate) without causing the inlet rate of airflow to exceed that of the outlet rate. In one example embodiment, 0.01-0.04 inches WG (e.g., about 3-10 Pascal) negative pressure is available.
For example, in at least one embodiment, when the user input indicates that a negative air pressure configuration is selected, then the inlet rate may be set to be less than the outlet rate. In such cases, the range of negative pressure that may be achieved within the room may vary from 270 cfm to 250 cfm when the room is about 96″wide×144″ long×84″ tall in size, the HVAC is about 2-ton cooling with 5 kW heating in size and the HEPA units are about 280 cfm rated in size. For example, in at least one embodiment, the pressure in the negative pressure configuration may be about at least 0.01 Water Column (WC).
Alternatively, if the user/operator wishes for the patient chamber 104b to maintain a positive air pressure, the air control system 114 can control the electrically controllable valves of dampers 118b1 and 118b2 so that a higher CFM of air is being conveyed into the patient chamber 104b than out of it. In particular, damper 118b1 may be angled to permit an inlet rate at a third rate of about 245 CFM, while the damper 118b2 is angled to permit an outlet rate at a fourth rate that is less than the third airflow rate and may be set at only about 170 CFM, for example. Various levels of inlet and outlet flows may be achieved, while still maintaining the patient chamber 104 at a positive air pressure with respect to the ambient pressure. This may be done by controlling the airflow system 108b to change the relative inlet rate and outlet rate without causing the outlet rate to exceed the inlet rate.
For example, in at least one embodiment, for a hospital or medical room environment, for the positive pressure configuration the pressure differential between the room and its external environment may be greater than +2.5 Pa (0.01 inches water gauge) or preferably greater than +8 Pa, there can be 12 or more air changes per hour and the filtration efficiency may be 99.97% @ 0.3 μm DOP. As another example, for a hospital or medical room environment, for the negative pressure configuration the pressure differential between the room and its external environment may be greater than −2.5 Pa (0.01 inches water gauge), there can be 12 or more air changes per hour and the filtration efficiency may be 90% (dust spot test) on the supply and 99.97% @ 0.3 μm DOP on the return. In general, the larger the room the faster the CFM to match the pressure condition and it is opposite for smaller rooms.
Furthermore, if the user/operator wishes for the patient chamber 104a to maintain a neutral air pressure, the air control system 114 may be configured to control the electrically controllable valves of dampers 118a1 and 118a2 so that the same CFM of air is being conveyed into the patient chamber 104 as is being conveyed out of it (i.e., the inlet rate substantially matches the outlet rate). For example, the damper 118a1 may be angled to permit an inlet rate of about 245 CFM, while the damper 118a2 is angled to permit an outlet rate of about 245 CFM. Various volumes of inlet and outlet flow may be achieved, while still maintaining the patient chamber 104a at a neutral air pressure with respect to the ambient pressure. This may be done by enabling a user to control the airflow system 108a to increase or decrease the inlet rate and outlet rate in unison so that none of them persistently exceeds the other.
In at least one embodiment, the HEPA filter units 116a1, 116a2, 116b1, 116b2 may be rated to provide at least twelve (12) air exchanges per hour. Alternatively, in some embodiments, the HEPA filter units 116a1, 116a2, 116b1, 116b2 may be controlled to provide about thirty (30) air exchanges per hour. If fewer air exchanges are used, the air control system 114 may control the blades of the damper units 118a1, 118a2, 118b1, 118b2 so that a lower volume than 245 CFM is being conveyed into or out of the patient chamber 104a, 104b. In at least one alternative embodiment, depending at least on air pressure conditions and chamber sizing, the HEPA filter units 116a1, 116a2, 116b1, 116b2 can be sized to provide a minimum of 12 air exchanges per hour up to about 30 air exchanges per hour depending on the size of the HVAC systems 109a, 109b. The required air exchanges and the size of the room with which the air control system is used dictates the size of the HEPA CFM. For instance, the larger the room for a given air exchange requires more CFM. As an example, in an ICU chamber, in a negative pressure configuration, the inlet air may be set to be 30% less CFM than the outgoing exhaust, thus allowing for about 12-15 air exchanges depending on the size of the chambers 104a, 104b and the HEPA system. It should be noted that when air exchanges are made using the air control systems described herein, the air exchange may be done to exchange 100% of the air in a room with new incoming filtered air.
The exact inlet and outlet rates that are used will depend on a number of parameters of the patient chamber of the unit 100. These parameters may include one or more of the volume of the patient chambers 104a and 104b, the number of air exchanges per hour, the relative pressure difference between the external environment and each patient chamber 104a, 104b, and the leakage area of each patient chamber 104a, 104b. For example, if the volume of the patient chamber 104a, 104b is increased, the inlet rate and outlet rate may be increased to maintain the same number of air exchanges per hour. If the leakage area of patient chamber 104a, 104b is increased, the difference between the inlet rate and outlet rate may be increased to overcome increased pressure losses. If the relative pressure between the external environment and each patient chamber 104a, 104b is increased in magnitude, the difference between the inlet rate and outlet rate may increase to overcome increased pressure losses. If the number of air exchanges required per hour is increased, both the inlet rate and outlet rate will need to be increased. In at least one embodiment, other factors may affect the inlet rates and outlet rates that are used to obtain and maintain a certain pressure condition. These factors may include one or more of friction, airflow patterns, air density and air temperature changes.
In at least one alternative embodiment, alternative HEPA filter units may be deployed that have been equipped with variable speed drives, obviating the need to separately control dampers 118 since a user is able to directly control motor speed for these alternative HEPA filter units.
For example, in at least one alternative embodiment, the air inlet subsystem 110 and air outlet subsystem 112 each comprise a HEPA filter unit that is equipped with a variable speed drive. The various air flow systems in these embodiments are similar to what is shown in
In this embodiment, the air pressure control system 114 can be configured such that each patient chamber 104a, 104b is operating independently of one another at positive pressure, negative pressure, or neutral pressure relative to the ambient environment. When a user configures the air pressure control system 114 to set the chamber 104a to positive pressure, the air pressure control system 114 directs the HEPA filter units of air inlet subsystem 110a and air outlet subsystem 112a to adjust both the inlet rate and outlet rate by adjusting the speed at which the variable speed drive of each HEPA filter unit is operating. The variable speed drive of the HEPA filter unit of the air inlet subsystem 110a may be adjusted such that the inlet rate is at a first flow rate such as about 245 CFM, for example, while the variable speed drive of HEPA filter unit of air outlet subsystem 112a may be adjusted such that the outlet rate is at a second flow rate that is less than the first flow rate, so the second flow rate may be at about 170 CFM, for example. As the inlet rate is greater than the outlet rate, the patient chamber 104 is operating at a positive pressure configuration.
Similarly, when a user configures the air pressure control system 114 to set patient chamber 104b to negative pressure, the air pressure control system 114 directs the HEPA filter units of air inlet subsystem 110b and air outlet subsystem 112b to adjust both the inlet rate and outlet rate, respectively, by adjusting the speed at which the variable speed drive of each of these HEPA filter units are operating. The variable speed drive of the HEPA filter unit of air inlet subsystem 110b may be adjusted such that the inlet rate is at a third rate such as 170 CFM, for example, while the variable speed drive of HEPA filter unit of the air outlet subsystem 112b may be adjusted such that the outlet rate is at a fourth airflow rate that is higher than the third airflow rate and may be at about 245 CFM, for example. As the inlet rate is less than the outlet rate, the patient chamber 104b is operating at a negative pressure configuration.
When a user configures the air pressure control system 114 to set patient chamber 104a to neutral pressure, the air pressure control system 114 directs the HEPA filter units of air inlet subsystem 110a and air outlet subsystem 112a to adjust both the inlet rate and outlet rate by adjusting the speed at which the variable speed drive of each HEPA filter unit is operating. The variable speed drive of the HEPA filter unit of air inlet subsystem 110a may be adjusted such that the inlet rate is at a fifth airflow rate such as about 245 CFM, for example, while the variable speed drive of the HEPA filter unit of air outlet subsystem 112a may be adjusted such that the outlet rate is at a sixth airflow rate which is about the same as the fifth airflow rate at about 245 CFM. As the inlet rate substantially matches the outlet rate, the patient chamber 104a is operating at a neutral pressure configuration, wherein the pressure inside patient chamber 104 is substantially equal to the pressure of the environment outside of mobile medical unit 100.
In other examples and situations, the air inlet subsystem 110 and the air outlet subsystem 112 may be configured such that the inlet rate and outlet rate differ from the example values given above.
In the example embodiment of
As previously described, in other examples, the airflow system may be applied to other semi-permanent or permanent structures. The semi-permanent or permanent structure may comprise a plurality of rooms. The airflow system may be installed into a single room of the plurality of rooms. In such situations, the air drawn into the inlet subsystems 110a, 110b may be sourced from either the environment external to the semi-permanent or permanent structure, or from another room of the semi-permanent or permanent structure.
The airflow system may be retrofitted into a room of an existing semi-permanent or permanent structure with multiple rooms. In such examples, the room which the airflow system is to be integrated into may comprise an HVAC air inlet and air return outlet. The integration of existing structure HVAC equipment may or may not be appropriate depending on the exact configuration of the HVAC equipment. For example, some HVAC systems may recirculate return air from multiple rooms into the HVAC air inlet of the multiple rooms. This may be problematic from a sterility standpoint, as return air from one room may be supplied into another room, without filtration, circumventing the filtration system of the airflow system.
Accordingly, in at least one embodiment, in a room comprising an HVAC air inlet and air return outlet, the HVAC air inlet and return outlet may be blocked or otherwise disabled. The airflow system described herein may be integrated into the room, wherein the flow into the room is exclusively through air inlet subsystem 110, while the flow out of the room is exclusively through air outlet subsystem 112. In such example embodiments, the air inlet subsystem 110 may source airfrom another room within the permanent or semi-permanent structure. This air may already be pre-treated by the building HVAC system, and therefore, may be at the desired temperature and humidity level. If the air was alternatively sourced from the external environment, the air may be at an uncomfortable temperature during certain times of year and may be further warmed or cooled. The air outlet subsystem 112 may deposit air either into another room of the semi-permanent or permanent structure, or to the environment external to the semi-permanent or permanent structure depending on, for example, whatever is more convenient.
In at least one other example embodiment, in a room of a semi-permanent or permanent structure comprising an HVAC air inlet and air return outlet, the HVAC return outlet may be blocked or otherwise disabled, while the HVAC air inlet into the room is left operational. The air inlet subsystem 110 may source intake air from either the environment external to the semi-permanent or permanent structure, or another room within the semi-permanent or permanent structure. The air outlet subsystem 112 may expel outlet air to the environment external to the semi-permanent or permanent structure or to another room within the semi-permanent or permanent structure. In such example embodiments, the structure's HVAC system may condition (e.g., pre-treat) the air within the room which the airflow system is installed into. The air inlet subsystem 110 may be placed near the HVAC air inlet, such that the air stream deposited into the room by the air inlet subsystem 110 substantially mixes with the air stream deposited into the room by the HVAC air inlet. The HVAC air inlet will provide temperature and humidity conditioned air, allowing the air inlet subsystem 110 to source air that may not be at an appropriate temperature and or have an appropriate humidity for an indoor environment, such as air sourced from the external environment during the winter season. Such a configuration may be used in cases where the structure's HVAC system is sized appropriately such that it may provide conditioned air at a rate matching or surpassing the rate of air provided by air inlet subsystem 110. Additionally, the use of the structure's HVAC system may be appropriate wherein the output from the HVAC system is sufficiently sterile. If the HVAC system recirculates outlet air from other areas of the structure, depending on the quality of the air, modifications may be made to the HVAC system, such as including additional filtration.
Referring now to
At step 204, the air pressure control system 114 adjusts the inlet rate by varying the valve position of the damper unit associated with the air inlet subsystem 110, until the desired inlet rate is reached. Step 204 may be conducted using open loop or closed loop control. In a closed loop control scheme, the valve position of the damper unit 116 is varied until the flow rate measured by flow meter 134 matches the desired inlet rate. In an open loop control scheme, the damper unit 116 is set to a desired position, that is predetermined to correspond to a certain inlet rate.
At step 206, air pressure control system 114 adjusts the outlet rate by varying the valve position of the damper unit 118 associated with the air outlet subsystem 112, until the desired outlet rate is reached. Step 206 may be conducted using open loop or closed loop control. In a closed loop control scheme, the valve position of the damper unit 118 is varied until the flow rate measured by flow meter 134 matches the desired outlet rate. In an open loop control scheme, the valve position of the damper unit 118 is set to a desired position, that is predetermined to correspond to a certain outlet rate.
In at least one embodiment of method 200, step 204 and step 206 may be executed concurrently.
After the completion of step 206, the airflow system 108 of the mobile medical unit is now set to the desired pressure configuration.
Some examples of method 200 may further comprise step 208, wherein the pressure indicator 120 is set to reflect the pressure configuration set at step 202. For example, in embodiments wherein pressure indicator 120 comprises an LED light, air pressure control system 114 instructs the pressure indicator 120 to output a given light color that is associated with the set pressure configuration. For example, when a positive pressure configuration is set at step 202, the pressure indicator 120 may be illuminated in a first color, such as blue and when a negative pressure configuration is set at step 202, the pressure indicator may be illuminated in a second color, such as red. In at least one embodiment, pressure indicator 120 may only reflect a pressure configuration when measurements obtained from pressure sensor 130 also reflect the pressure configuration. For example, when the pressure configuration set at step 202 is a positive pressure configuration, the pressure indicator 120 will only reflect a positive pressure condition when measurements obtained from pressure sensor 130 reflect a positive pressure condition.
Referring now to
Method 250 begins with step 252 where the air pressure control system 114 is set to control the air pressure of the room to be at a desired air pressure configuration. The air pressure control system 114 may be adjusted or interfaced with as described in step 202 of method 200 and the air pressure configuration can have various settings as described in step 202 of method 200.
At step 254, the air pressure control system 114 adjusts the inlet rate by varying the speed of the HEPA filter unit associated with the air inlet subsystem 110, until the desired inlet rate is reached. Step 254 may be conducted using open loop or closed loop control. In a closed loop control scheme, the speed of the HEPA filter unit is varied until the flow rate measured by flow meter 134 matches the desired inlet rate. In an open loop control scheme, the speed of the HEPA filter unit is set to a desired speed, that is predetermined to correspond to a certain inlet rate.
At step 256, the air pressure control system 114 adjusts the outlet rate by varying the speed of the HEPA filter unit 116 associated with the air inlet subsystem 110, until a desired outlet rate is reached. Step 256 may be conducted using open loop or closed loop control. In a closed loop control scheme, the speed of the HEPA filter unit is varied until the flow rate measured by flow meter 134 matches the desired outlet rate. In an open loop control scheme, the speed of the HEPA filter unit is set to a desired speed, that is predetermined to correspond to a certain outlet rate.
In at least one embodiment of method 250, steps 254 and 256 may be executed concurrently.
After the completion of step 256, the airflow system 108 of the mobile medical unit is now set to the desired pressure configuration.
Some examples of method 250 may further comprise step 258, wherein the pressure indicator 120 is set to reflect the pressure configuration set at step 252. For example, in embodiments wherein pressure indicator 120 comprises an LED light, air pressure control system 114 instructs the pressure indicator 120 to output a given light color associated with the set pressure configuration as was described in step 208 of method 200.
It should be understood that while the description of the methods 200 and 250 is with respect to controlling air pressure configuration for one room, the methods 200 and 250 may be used to selectively control the air pressure configuration for at least two rooms independently of one another by selecting control settings for each room where the settings may be the same or different and sending control signals to the controllable air flow components (e.g. HEPA filter units, dampers, etc.) of the different rooms where the control signals are generated according to the selected control settings so that the control signals achieve the desired pressure configuration in the two or more rooms.
In instances of the methods 200 and 250, where the air pressure control system 114 may be set to a positive pressure configuration, the inlet rate is greater than the outlet rate.
In instances of the methods 200 and 250, where the air pressure control system 114 may be set to a negative pressure configuration, the inlet rate is less than the outlet rate.
In instances of the methods 200 and 250, where the air pressure control system 114 may be set to a neutral pressure configuration, the inlet rate is substantially equal to the outlet rate.
In at least one embodiment described herein, the unit 100 or other rooms of the various structures described herein that incorporate the airflow control system and may be used in semi-permanent, or permanent compound structures of various configurations, may be fully insulated to provide reliable operation within temperatures ranging from about −50° C. (−58° F.) to about 50° C. (122° F.). Temperature controls may be used within such rooms such that whatever the outdoor season, there is no temptation to open a door/window and/or frustration at being unable to do so.
In accordance with another aspect of the teachings herein, in at least one embodiment, the rooms of the mobile unit 100 have wall panels that may be configured to be fixed in place adjacent to the walls of the shipping container 102. However, the traditional technique of forming walls by first affixing studs to the wall of the shipping container and then applying cladding to the studs provides for a thick wall that imposes on the already-limited volume within the shipping container 102. As such, in accordance with the teachings herein, at least one embodiment is described in which each wall panel may be configured to be positioned nearer to the wall of the shipping container 102, such that each wall panel can interface at its top side and its bottom side with a respective strip of angle iron to keep it in position closer to the wall 102 of the shipping container.
In another aspect, in at least one embodiment described herein, each wall panel may also be configured to interface along its sides with other like wall panels, thereby to fixedly interlock with the adjacent wall panels to form a larger wall section having greater structural strength.
In another aspect, in at least one embodiment described herein, wall panels are provided that may laterally interconnect with one another in a self-sealing manner such that an airtight seal can be formed between adjacent wall panels which is beneficial when the walls panels are used in rooms that are to be maintained at a certain pressure configuration relative to the ambient environment as explained previously.
In this description, the interior walls, the exterior walls, the roofing structure, and the ceiling of the mobile unit 100 and other structures described herein may be formed with powder-coated, marine grade aluminum or metal panels. For example, H52 marine grade aluminum may be used. Marine grade material may also provide corrosion resistance and can tolerate even constant contact with seawater. Alternatively, in at least one embodiment, these structural elements may be formed of any metal such as, but not limited to, for example, A36, 44W, any other suitable ASTM grades or carbon-based thermoplastic materials.
Referring now to
Referring now to
This severing 308 and separation may be repeated at the junction between the very bottom of the front facing-side 306 and the very bottom of the right-facing side 302, thereby to also receive therein the same leg of the bottom piece of angle iron.
Similarly, this severing 308 and separation may be repeated at the very top of the front facing- and left-facing sides 306 and 312, respectively, as well as at the very top of the front-facing and right-facing sides 306 and 302, thereby to receive with each the same leg of an upper piece of angle iron.
Other methods of forming the wall panel 300 may be used.
The ability of the wall panel 300 to receive, in its upper and lower regions 300a and 300b, respective legs of an angle iron may enable the wall panel 300 to be fixed in place by first engaging upper and lower pieces of angle iron that are themselves bolted directly into a wall of the shipping container 102, and then sliding the panel 300 laterally into place along the wall as though the angle irons were rails. Once in place, the wall panel 300 may be affixed in place along the angle-iron using fasteners such as bolts, for example.
The formation of left side surfaces 312 and right side surfaces 302 of the wall panel 300 as described in
In at least one embodiment, the left side surface 312 and the right side surface 302 of each wall panel 300 may further include a lateral interlock system including a right side lateral interlock interface 316 and a left side lateral interlock interface 318, thereby to enable adjacent panels to interconnect with each other. In this embodiment, each lateral interlock interface 316, 318 includes multiple interconnection structures 320a, 320b (only two of which are labelled for simplicity), which serve as lateral interface components that are positioned along each of the left and right sides 312. In at least one embodiment, each interconnection structure 320a, 320b is a tab-slot combination cut into the respective side of the wall panel 300. That is, a male tab of each interconnection structure 320a, 320b can be received within the female slot of a like interconnection structure 320a, 320b of an adjacent panel that is oriented at 180 degrees with respect to its mate, and the slot of each interconnection structure 320a, 320b receives the tab of a like interconnection structure of the adjacent panel.
Referring now to
In at least one embodiment, each lateral interface component 406 has a portion and a female portion, which in this case are a male tab 408 and a female slot 410, that each engage with respective lateral interface components 407 of the rightmost wall panel 404 that are oriented in a complementary fashion, which in this case is at 180 degrees, with respect to them. Referring now to
In this example embodiment, each male tab 408 is angled away from the edge surface to which it is coupled such that the distance between the underside of the male tab 408 and the edge surface of the side wall of the wall panel is tapered to the point where the male tab 408 joins the edge surface. This allows the male portions of adjacent lateral interface components to actually engage with one another as the wall panels 402 and 404 are laterally coupled to one another such that the surface of the male tabs slide against one another and make a friction fit with one another. This has the effect that the wall panels 402 and 404 more securely and tightly engage one another such that an airtight or near airtight seal is made between adjacent wall panels 402 and 404. This is beneficial since this airtight coupling makes the wall panels suitable for use in rooms that must be maintained at a certain pressure which is different compared to the pressure of the environment that is external to the room.
In at least one embodiment, to provide interconnection, two adjacent wall panels 402 and 404 may be positioned close to each other but slightly offset from each other height wise, and with the interface components (e.g., male tabs) oriented in opposite directions. As the wall panels 402 and 404 are brought closer together, but still kept slightly offset from each other, the respective male tabs of a given panel approach and begin to enter into respective mating slots in the other panel. With the tabs having begun entering into respective mating slots, the two panels 402 and 404 can thereafter be shifted with respect to each other so that they are aligned height wise. As this is done, the male tabs may seat further into respective slots and also engage with one another thereby pulling the panels closer to each other and interlocking them at the same time.
Referring now to
As shown in
Referring now to
In at least one embodiment, once the wall panels 402 and 404 are in place relative to the rails of the angle irons 430a and 30b, a sealant, such as medical grade silicone sealant, can be applied along the interfaces between panels to provide mold-resistant sealing once the wall panels 402 and 404 are in place and interlocked with one another and the angle irons 430a and 430b.
There may be various alternative embodiments where, for example, the male portions of the lateral interface components may be angled differently but are still oriented such that male portions of lateral interface components of two edge surfaces of walls panels that engage one another are oriented opposite one another. For instance, in the example embodiment shown in
It will be appreciated that the construction of the wall systems within the mobile unit 100 and other mobile, semi-permanent, permanent and custom enclosures can, with the configuration of wall and roofing panels described herein, be done more rapidly than can the formation of walls using conventional stud construction techniques, thereby to enable a mobile unit, or other mobile structure, to be constructed more rapidly so it can be deployed more rapidly.
In at least one embodiment, the ceiling panels may also be formed in a similar manner as some of the wall panels described herein, but without the features for interfacing with angle irons, and without interconnection structures. For example, ceiling panels having, like the wall panels, respective insulation cavities may, along with the insulation panels, individually be raised above the angle irons supporting the wall panels and slid along the tops of the wall panels. In at least one embodiment, the ceiling panels may be supported in place by wall panels that extend along the front and back walls of the mobile unit. Once in position, the ceiling panels may be fastened together with bolts, or other fasteners, and then medical grade silicone may be applied to the gaps between adjacent ceiling panels.
In at least one embodiment, a vapour barrier film may also be included in the units 100 and used to control condensation and may be applied between at least one of the wall panels or at least one of the ceiling panels and the interior surfaces of the side walls or the roof of the housing of the shipping container 102. In such cases, the vapour barrier film may be sprayed onto the surfaces where condensation may otherwise form.
Referring now to
Shown at the corners of the shipping container 450 are standard blocks 458, which can be referred to as corner castings, with openings for facilitating the receipt of clamps or fasteners for the clamping-together of multiple shipping containers (serving, in this description, as mobile medical units, anteroom units, nurse station units, hallway units, connector units or other types of units) that are placed and secured adjacent to each other to form compound structures. Only one of the corner castings 458 is labelled for ease of illustration. These compound structures may be portable, semi-permanent or permanent structures.
Referring now to
In this example embodiment, the nurse station unit 504 itself is constructed based on a shipping container that is the same size as that of the mobile medical unit 502 but is configured to have different interior features than the mobile medical unit 502. In this example embodiment, the nurse station unit 504 itself has two exterior doorways with respective doors 504d1 and 504d2, half-wall divider or partition 504p1, half-wall 504w and internal door 504d2, which generally partitions the unit 504 into room 504a and room 504b, which may serve as another patient room. In room 504b there can be various patient setups, and in this example, there is a patient bed. A person can get into the patient room 504b via the internal door 504d3 or the external door 504d2. The unit 504 can have a variety of internal setups including, but not limited to, various pieces of furniture including a cabinet, and a desk for a nurse's station 506, and a portable handwashing station 507. The nurse unit 504 may be fitted with at least one independent HVAC unit (not shown) for air conditioning within the nurse unit 504.
The nurse unit 504 also features two additional doorways 504f1 and 504f2 that may optionally be opposite the exterior doors 504d1 and 504d2. The doorways 504f1 and 504f2 respectively face doors 502d1 and 502d2 of the mobile medical unit 502. In this way, the doors 502d1 and 502d2 of the unit 502 may be opened outwards and into the nurse unit 506 when required.
In this example embodiment, each doorway (i.e., door frame) 504f1 and 504f2 of the nurse unit 504 is larger in height and width than the corresponding door 502d1 and 502d2 of the mobile medical unit 502. Each doorway 504f1 and 504f2 of the nurse unit 506 includes a frame with an outward-facing planar surface that faces and runs parallel to a corresponding outward-facing planar surface that is a portion of the exterior wall of the unit 502 which is around the doors 502d1 or 502d2 of the mobile medical unit 502. The outward-facing planar surface portions of the mobile medical unit 502 faced by and adjacent to the outward-facing surface portions around the frames of the doorways 504f1 and 504f2 of the nurse unit 506 are planar or in other words have a flat pattern. Because these surface portions of the units 502 and 504 face are adjacent one another the foam seal is placed on these flat surfaces which are then urged towards each other due to the clamping of the corner blocks which will aid in forming a seal around the doors 502d1 and 502d2 as the rooms 502a and 502b may be at a positive pressure or a negative pressure relative to the nurse unit 504 as explained previously for unit 100. The widths and thickness of the planar or flat pattern surfaces that are adjacent to one another are dimensioned to be wide enough (e.g., at least about 6 inches) and thick enough to withstand the compression forces when they are pushed together as the shipping containers are clamped and urged together.
In this example embodiment, prior to bringing the two shipping containers for unit 502 and 504 physically together, seals are provided between of each of the larger openings between the surfaces of the two units 502 and 504 that face one another. For example, since doorways 504f1 and 504f2 are larger than the opposing doors 502d1 and 502d2, respectively, seals can be positioned so that they will be at and/or around the portions of the doorways 504f1 and 504f2 of unit 504 that will make contact with an opposing surface of the unit 502. In some embodiments for compound structures, when two shipping containers are urged together and the entirety or a majority of the walls that would otherwise be adjacent to one another are removed then the seal may be sized and disposed to be between the entire frames of the shipping containers that are adjacent to one another.
In at least one embodiment, the seal may be a frame-shaped body of neoprene rubber foam having a sufficient thickness such as, but not limited to, about two (2) to three (3) inches, or about 2.5 inches in thickness and about two (2) to three (3) inches wide. Alternatively, in at least one embodiment, the seal may be a closed cell foam having similar dimensions. The closed cell foam has holes, but they are not connected so that water, fluid, or other gas does not pass through this foam as they would for a sponge. The holes in the closed cell foam allow the foam to be more compressible as well to increase the amount of sealing that is provided. In applying the foam seal, two adjacent shipping containers are coupled and urged or pressed together which will compress the foam. After the two adjacent shipping containers are no longer moved towards one another, the foam will start to expand and create a tighter seal.
In at least one embodiment the seal may be adhered to either to a surface portion of the mobile medical unit 502 or a surface portion of the nurse station unit 504 at and/or around the frames of doorways 504f1 and 504f2. Alternatively, the seal may be held in place as the two shipping containers are being brough together. As the two shipping containers are brought together in alignment, the frames of the mobile medical unit and the nurse station module are brought into alignment. As the two shipping containers are urged closer together, by increasing the clamping force at the corner casting blocks 502c1 and 504c1 as well as 502c2 and 504c2, the seal is increasingly compressed between the adjacent surfaces of the units 502 and 504 that contact one another thereby serving as a gasket for providing a fluid-tight seal around the frames of the doorways 504f1 and 504f2. In this way, air exiting the mobile medical unit 502 via the opening of door 502d1 and 502d2 from a patient chamber 502a or 502b can exit only into the nurse station unit 504, and air exiting the nurse station unit 504 via these doors can exit only into a patient chamber. That is, such air cannot escape between the shipping containers themselves.
Accordingly, in at least one embodiment the seal goes around the entire frame of the shipping container and may only be around the openings of the containers that face one another. Thus, any snow or water that falls on the shipping containers may flow between the shipping containers and around the portions of the shipping containers that are sealed together rather than just settling on top of the roofs of the shipping containers if the frames of the shipping containers were sealed to each other. Any rain or snow sitting on the roof of a shipping container may increase the likelihood of fluid leakage to the interior of the units which may cause damage.
It will be appreciated that, in embodiments described herein, all of the various doorway interconnections and/or any cut away areas that do not have a window or door in compound structures made with one or more mobile medical units and other modules such as a nurse station module, a hallway module, a connection module, an anteroom module, and some other modules, may be sealed together in the same way with respective frame-shaped gaskets that are compressed to form airtight seals between each of the various modules that may be used to construct a compound structure.
Provision of the fluid-tight seal around the doorway using a thick and at least somewhat rigid material such as neoprene rubber foam is advantageous in this application. In particular, because the mobile medical units and other modules described herein have patient chambers capable of being flexibly switched between negative, neutral, and positive pressure conditions, the relative rigidity of a frame of neoprene rubber foam or the like enables it to resist collapsing into, or being blown away from, the doorway it is meant to seal.
Another aspect of the foam seals that can be used in accordance with the teachings herein is that they are more resilient to forces which maybe encountered during use. For example, there may be shocks or vibrations or shearing forces that cause the adjacent shipping containers to move relative to one another. Using a compressed foam seal results in the seal being maintained between adjacent shipping containers. This is in contrast with conventional techniques of connecting adjacent shipping containers together which typically involves welding the containers together. These welds are more susceptible to cracking and damage when the above-noted forces are experienced by adjacent connected shipping containers, which will make it problematic to maintain a pressurized seal between the shipping containers.
Furthermore, using a weld to hold adjacent shipping containers together makes it more difficult for the compound structure including these shipping containers from being mobile as the welds will have to be removed in order to move the shipping containers to another location which is time consuming. In contrast, using fasteners to couple adjacent shipping containers together as well as a foam-based seal to maintain a pressurized coupling for orifices of each shipping container that are adjacent to one another, allows for the shipping containers to be more easily decoupled from one another and moved to another location where they may be coupled together and have a pressurized seal between them. This is because such foam-based seals may be removable and reusable.
In this example embodiment, power and data to the nurse station unit 504 may be provided along a twin-male cable extending between the mobile medical unit 502 and the nurse station unit 504. In this manner, the nurse station unit 504 may be powered by the mobile medical unit 502 rather than directly by an external source. Furthermore, the nurse station unit 504 can simultaneously be provided with a data link for conveying audio, video, and other data to and from the mobile medical unit 502. It will be appreciated that wireless communications configurations, such as Wi-Fi, may alternatively, or in addition, be facilitated for communications as between modules and between modules and other locations.
This information can be used to monitor the patient, the air quality and the pressure conditions within the patient chambers 502a and 502b, as well as to control and/or monitor the medical equipment operating within the patient chambers 502a and 502b. Patients, their families, and the caregivers are able to connect with each other using the communications infrastructure integrated with the mobile medical unit 502 and the nurse station unit 504. For example, doctors and other medical practitioners can communicate with the families of patients from inside. Alternatively, in at least one embodiment, the nurse station unit 504 can optionally receive its power directly from a power distribution source instead of the mobile medical unit 502.
Referring now to
Referring now to
It should be noted that the nurse station units 504, 504′ and 554 shown in the compound structures 500, 500′ and 550 can function as ante rooms which provide a space just outside the patient rooms of the mobile medical units 502, 552 and 552′ to reduce any changes in pressure when the doors of the mobile medical units 502, 552 and 552′ are open.
Referring now to
Referring now to
Referring now to
Referring now to
Referring now to
Referring now to
Referring now to
Referring now to
In the various example embodiments disclosed herein, the mobile medical unit and the other modules usable for forming compound structures of various configurations, are fully insulated to provide reliable operation within temperatures ranging from −50° C. (−58° F.) to about 50° C. (122° F.), and a constructed with fire-resistant construction techniques and materials.
It should be noted that in the various embodiments described herein where shipping containers are being used as mobile medical units or portions of a compound structure that is used for medical purposes, the various modules and units are built to meet medical/hospital room standards such as those used in hospitals while occupying a more constrained physical space (i.e., a shipping container). Since the shipping containers include metal walls and metal roofs and these units need to be mobile, which may involve transport using a flatbed truck or a tractor trailer that travels on rough surfaces (e.g., bumpy country or city roads), different construction techniques are used compared to those which would be used in a conventional medical setting in a building.
For example, certain components are constructed to have increased rigidity which may include the various ducts that are used by the airflow systems. These ducts have seams that are sealed using a more durable sealant, such as concrete sealing, that is able to withstand shocks that are experienced during transportation of the medical unit. The duct work that is used is therefore rigid. This is in contrast to the duct work used in medical buildings where the duct seams may be sealed with duct tape.
As another example the metal housing of the shipping container including the roof and/or the outer walls as well as optionally the rigid wall panels described herein may be used for suspending certain medical or airflow system components, such as the HVAC system, which allows these components to be distributed around the shipping container freeing up more space in the shipping container for the rooms contained therein. For example, marine grad materials may be used for certain wall panels, ceiling components and housing of the shipping container which provides additional structural integrity for the various modules/units described herein.
In the various embodiments described herein, the containers that are used to make the various units can be other types of suitable shipping/storage containers including double-door containers, for example.
In one aspect, in accordance with the teachings herein, in at least one embodiment described herein there is provided a mobile medical unit comprising a housing incorporating at least two patient chambers, the patient chambers sealed from each other and each independently powered and provided with independent air handling.
In at least one embodiment, the housing is a shipping container.
In at least one embodiment, there are two patient chambers.
In at least one embodiment, the independent air handling comprises independent air filtration and conditioning.
In one aspect, in accordance with the teachings herein, in at least one embodiment described herein there is provided a wall panel comprising: a panel body comprising: a top side and a bottom side opposite the top side; a front side and a rear side opposite the front side; a right side and a left side opposite the right side; a lateral interlock system comprising a first lateral interlock interface that is integral with the right side and a second lateral interlock interface that is integral with the left side, each of the first and second lateral interlock interfaces comprising: at least one lateral interface component comprising a male portion and a corresponding female portion, wherein the at least one lateral interface component of the first lateral interlock interface is oriented at 180 degrees to the at least one lateral interface component of the second interlock interface.
In at least one embodiment, each of the male portions is a tab, and each of the female portions is a slot, the tab extending away from the panel body from an end of the slot at an angle that is offset from the plane of its respective right or left side, wherein each slot is dimensioned to receive the tab of another like wall panel.
In at least one embodiment, while each slot is receiving the tab of another like wall panel, the tab associated with the slot is in contact with the tab of the like wall panel.
In at least one embodiment, each of the first and second lateral interlock interfaces comprises a plurality of lateral interface components.
In at least one embodiment, the wall panel further comprises an insulation cavity bounded by the rear side, the right side and the left side, the insulation cavity for receiving a panel of insulation material.
In another aspect, in accordance with the teachings herein, in at least one embodiment this is provided an airflow system for a chamber, the airflow system comprising: an air inlet subsystem for drawing air into the chamber at an inlet rate; an air outlet subsystem for drawing air out of the chamber at an outlet rate; an air pressure control system associated with the air inlet subsystem and the air outlet subsystem, the air pressure control system controlling the inlet rate and the outlet rate thereby to enable the chamber to be operated with respect to the ambient air pressure outside of the chamber as any of: a positive pressure chamber, a negative pressure chamber, and a neutral pressure chamber.
In at least one embodiment, the airflow system further comprises a user interface associated with the air pressure control system for receiving instructions from a user and for, in response, instructing the air pressure control system to control the inlet rate and the outlet rate to at least one of: transition the chamber from a positive pressure chamber to a negative pressure chamber; transition the chamber from a negative pressure chamber to a positive pressure chamber; transition the chamber from a negative pressure chamber to a neutral pressure; transition the chamber from a positive pressure chamber to a neutral pressure; transition the chamber from a positive pressure chamber having a first positive pressure to a positive pressure chamber having a second positive pressure; transition the chamber from a negative pressure chamber having a first negative pressure to a negative pressure chamber having a second negative pressure; increase a rate of air exchange through the chamber; decrease a rate of air exchange through the chamber.
In at least one embodiment, the air inlet subsystem comprises a HEPA filter; and the air outlet subsystem comprises a HEPA filter.
In at least one embodiment, the air inlet subsystem comprises a damper for modifying the rate of airflow entering the chamber; and the air outlet subsystem comprises a damper for modifying the rate of airflow entering the chamber.
In at least one embodiment, the air inlet subsystem is associated with an HVAC subsystem for providing at least one of: air-cooling, air heating, humidity control.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a compound structure comprising at least: a first mobile unit comprising a first doorway; and a second mobile unit comprising a second doorway, the first and second mobile units being held adjacent to each other with the first and second doorways in alignment; a first compressible gasket compressed between the first and second doorways thereby to seal the interface between the first and second mobile units about the first and second doorways.
In at least one embodiment, the compressible gasket maintains the seal under positive, negative and neutral pressures within the first and second mobile units.
In at least one embodiment, the compressible gasket is formed of neoprene rubber foam.
In at least one embodiment, the compressible gasket is shaped to frame the first and second doorways, and preferably has a frame width of about three inches, and more preferably has a thickness of about three inches.
In at least one embodiment, the first mobile unit comprises a third doorway and the second mobile unit comprises a fourth doorway, the compound structure further comprising a second compressible gasket compressed between the third and fourth doorways thereby to also seal the interface between the first and second mobile units about the third and fourth doorways.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a compound structure comprising a plurality of mobile modules adjacent to and connected to each other, wherein the plurality of mobile modules comprises at least one mobile module of a first kind and at least one mobile module of a second kind that is different from the first kind.
In at least one embodiment, the first kind and the second kind are selected from the group consisting of: a medical module, a hallway module, a connection module, a nurse station module, an anteroom module, and a pharmacy module.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a structure that is portable, permanent or semi-permanent, wherein the structure comprises: a housing defining a room therein; and an air flow system that is coupled to the room for providing conditioned air thereto, the air flow system including components located in a maintenance room adjacent to the room and components located exterior to the maintenance room, the air flow system being configured to controllably transition the at least one room between an positive air pressure configuration, a neutral air pressure configuration and a negative air pressure configuration relative to an environment that is external to the housing.
In at least one embodiment, the airflow system comprises: an air inlet subsystem disposed at an upper portion of the maintenance room and configured for drawing inlet air into the room at an inlet rate; an HVAC system that is located exterior to the maintenance room and is fluidically coupled to the air inlet subsystem for receiving the inlet air and conditioning the inlet air and sending the conditioned air into the room; and an air outlet subsystem disposed at a lower portion of the maintenance room and configured for receiving outlet air and sending the outlet air out of the room at an outlet rate.
In at least one embodiment, the airflow system further comprises an air pressure control system coupled to the air inlet subsystem and the air outlet subsystem, the air pressure control system having a processor unit that is adapted to control the inlet rate and the outlet rate to enable the air pressure in the room be selectively controlled to be at the positive air pressure configuration, the negative air pressure configuration, or the neutral air pressure configuration.
In at least one embodiment, the air inlet subsystem and the air outlet subsystem each comprise a HEPA filter unit and a damper unit coupled to the HEPA filter unit, wherein the processing unit is configured to control the inlet rate and the outlet rate of the airflow system by adjusting a valve position of each damper unit.
In at least one embodiment, the air inlet subsystem and the air outlet subsystem each comprise a HEPA filter unit, wherein each HEPA filter unit comprises a variable speed drive, wherein the processor unit is configured to adjust the inlet rate and outlet rate by adjusting the speed of the variable speed drive of each HEPA filter unit.
In at least one embodiment, the processor unit is configured to control the HVAC system is adapted to process the incoming air by providing air-cooling, air heating, and/or humidity control.
In at least one embodiment, the air inlet subsystem includes an inlet and an outlet, the inlet being adapted to receive incoming air from outside the room and provide the incoming air to the HEPA filter unit of the air inlet subsystem for filtering the incoming air and the outlet is adapted to provide the filtered air to an input of the HVAC unit, and the HVAC unit has an output to provide the processed air to the room.
In at least one embodiment, the air outlet system comprises an inlet and an outlet, the inlet of the air outlet system being adapted to receive air from the room and provide the air to the HEPA filter of the air outlet system for filtering the air and providing the filtered air to the output of the air outlet system for venting to the outside of the room.
In at least one embodiment, the processing unit is configured to enable up to about 30 air changes per hour.
In at least one embodiment, a return air vent to the HVAC system can be closed so that no air will re-circulate back through the HVAC system. In such embodiments, the HEPA system that receives fresh air may be sized to feed sufficient airflow into the return duct, thus allowing for a 100% air exchange.
In at least one embodiment, the enclosure further comprises a pressure indicator that is communicatively coupled to the processor unit to receive a control signal therefrom for indicating to individuals outside the room as to whether the room is being maintained at a positive pressure configuration, a negative pressure configuration or a neutral pressure configuration.
In at least one embodiment, the airflow system further comprises an input interface that is associated with the air pressure control system and is communicatively coupled to the processor unit, the input interface being adapted for receiving instructions for a selected air pressure configuration and providing the instructions to the processor unit and in response the processor unit is configured to control the air pressure control system to control the inlet rate and the outlet rate of the room to achieve the selected air pressure configuration for the room.
In at least one embodiment, the airflow system of any one of claim 12, wherein the processor unit is configured to control the air pressure control system to control the inlet rate and the outlet rate to transition the room from a positive pressure configuration to a negative pressure configuration by controlling the inlet rate to be less than the outlet rate.
In at least one embodiment, the processor unit is configured to control the air pressure control system to control the inlet rate and the outlet rate to transition the room from a negative pressure configuration to a positive pressure configuration by controlling the inlet rate to be more than the outlet rate.
In at least one embodiment, the processor unit is configured to control the air pressure control system to control the inlet rate and the outlet rate to transition the room from a negative pressure configuration to a neutral pressure configuration by controlling the inlet rate to be the same as the outlet rate.
In at least one embodiment, the processor unit is configured to control the air pressure control system to control the inlet rate and the outlet rate to transition the room from a positive pressure configuration to a neutral pressure configuration by controlling the inlet rate to be the same as the outlet rate.
In at least one embodiment, the processor unit is configured to control the air pressure control system to control the inlet rate and the outlet rate to transition the room from a positive pressure configuration having a first positive pressure to a positive pressure configuration having a second positive pressure by controlling the inlet rate from a first value to a second value that is higher than the first value and the inlet rate is higher than the outlet rate.
In at least one embodiment, the processor unit is configured to control the air pressure control system to control the inlet rate and the outlet rate to or transition the room from a negative pressure configuration having a first negative pressure to a negative pressure configuration having a second negative pressure by controlling the inlet rate from a first value to a second value that is less than the first value and the inlet rate is lower than the outlet rate.
In at least one embodiment, the room comprises a ceiling cavity above a ceiling of the room and the ceiling cavity is pressurized.
In at least one embodiment, the ceiling cavity is pressurized to be at the ambient pressure that is external to the room.
In at least one embodiment, the structure is a mobile medical unit and the room is a patient chamber.
In at least one embodiment, the housing constructed from a shipping container.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a method of configuring an air pressure of a room of a portable, semi-permanent or permanent enclosure having an airflow system, the airflow system comprising: an air inlet subsystem for drawing air into the room of the enclosure at an inlet rate, and an air outlet subsystem for drawing air out of the room of the enclosure at an outlet rate, wherein the method comprises: receiving an input via an input interface to select an air pressure configuration for the room of the enclosure and sending the input to a processor unit that is adapted to control the airflow system, the air pressure configuration being a positive pressure, a negative pressure, or a neutral pressure with respect to ambient air pressure outside of the room; varying the inlet rate of the air inlet subsystem, via the processor unit, based on the selected air pressure configuration; and varying the outlet rate of the air inlet subsystem, via the processor unit, based on the selected air pressure configuration.
In at least one embodiment, when the input indicates that the selected air pressure configuration is positive pressure, the method comprises setting the inlet rate to be greater than the outlet rate.
In at least one embodiment, when the input indicates that the selected air pressure configuration is negative pressure, the method comprises setting the inlet rate to be less than the outlet rate.
In at least one embodiment, when the input indicates that the selected air pressure configuration is neutral pressure, the method comprises setting the inlet rate to be equal to the outlet rate.
In at least one embodiment, when the air pressure control system further comprises a pressure indicator, and the method further comprises setting the pressure indicator to indicate the air pressure configuration of the room of the portable enclosure.
In at least one embodiment, the air inlet subsystem and the air outlet subsystem each comprise a damper unit, and varying the inlet rate comprises adjusting a valve position of the damper unit of the air inlet subsystem and varying the outlet rate comprises adjusting a valve position of the damper unit of the air outlet subsystem.
In at least one embodiment, the air inlet subsystem and the air outlet subsystem each comprise a HEPA filter unit with a variable drive system, and varying the inlet rate comprises adjusting the speed of the variable drive system of the HEPA filter unit of the air inlet subsystem and varying the outlet rate comprises adjusting the speed of the variable drive system of the HEPA filter unit of the air outlet subsystem.
In at least one embodiment, based on the input, the method comprises transitioning the room from a positive pressure configuration to a negative pressure configuration by controlling the inlet rate to be less than the outlet rate.
In at least one embodiment, based on the input, the method comprises transitioning the room from a negative pressure configuration to a positive pressure configuration by controlling the inlet rate to be more than the outlet rate.
In at least one embodiment, based on the input, the method comprises transitioning the room from a negative pressure configuration to a neutral pressure configuration by controlling the inlet rate to be the same as the outlet rate.
In at least one embodiment, based on the input, the method comprises transitioning the room from a positive pressure configuration to a neutral pressure configuration by controlling the inlet rate to be the same as the outlet rate.
In at least one embodiment, based on the input, the method comprises transitioning the room from a positive pressure configuration having a first positive pressure to a positive pressure configuration having a second positive pressure by controlling the inlet rate from a first value to a second value that is higher than the first value and the inlet rate is higher than the outlet rate.
In at least one embodiment, based on the input, the method comprises transitioning the room from a negative pressure having a first negative pressure configuration to a negative pressure configuration having a second negative pressure by controlling the inlet rate from a first value to a second value that is less than the first value and the inlet rate is lower than the outlet rate.
In at least one embodiment, the method comprises controlling the air pressure configuration of at least two rooms independently of one another.
In another aspect, in accordance with the teachings herein, there is provided a structure comprising: an enclosure having a room; and an airflow control system that is operated to control an air pressure configuration of the room, the airflow control system being defined according to the teachings herein.
In at least one embodiment, the room comprises a ceiling cavity above a ceiling of the room and the ceiling cavity is pressurized.
In at least one embodiment, the ceiling cavity is pressurized to be at the ambient pressure that is external to the room.
In at least one embodiment, the structure is a portable, semi-permanent or permanent structure.
In at least one embodiment, the structure is a mobile medical unit and the room is a patient chamber.
In at least one embodiment, the structure is constructed from a shipping container.
In at least one embodiment, the structure is a semi-permanent or permanent structure comprising multiple rooms, having a first set of rooms and a second set of rooms where the airflow control system is installed only in the rooms in the first set of rooms of the permanent structure.
In at least one embodiment, the air inlet subsystem is adapted to source air from a given room within the structure where the given room is in the second set of rooms.
In at least one embodiment, the air inlet subsystem is adapted to source air from an environment external to the structure.
In at least one embodiment, an HVAC system installed within the structure is adapted to supply conditioned air into any room of the enclosure where the airflow control system is installed.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a structure that comprises a wall panel system having at least one wall panel having a panel comprising: a front surface and a rear surface opposite the front surface; a right side surface and a left side surface opposite the front surface; a lateral interlock system comprising a first lateral interlock interface that is disposed at the right side surface and a second lateral interlock interface that is disposed at the left side surface, each of the first and second lateral interlock interfaces comprising at least one lateral interface component; wherein the at least one lateral interface component of the first or second lateral interlock interface of the at least one wall panel is oriented to slidably engage at least one lateral interface component of a corresponding interlock interface of an adjacent wall panel to connect the at least one wall panel and the adjacent wall panel in a co-planar fashion to form a larger wall section. In at least one embodiment, the at least one lateral interface component comprises a male portion and a female portion.
In at least one embodiment, the female portion is a slot, and the male portion is a tab that extends away from an end of the slot at an angle to a side surface of the panel body, wherein the slot is dimensioned to receive a corresponding tab of the adjacent wall panel.
In at least one embodiment, when the at least one wall panel is laterally engaged with the adjacent wall panel the first male tab of the at least one first lateral interface component of the first at least one wall panel slidably engages a corresponding male tab of at least one second lateral interface component of the adjacent wall panel to make a friction fit.
In at least one embodiment, the tab of each lateral interface component is oriented vertically, horizontally or at an angle with respect to the side surface of the panel body.
In at least one embodiment, each of the first and second lateral interlock interfaces comprises a plurality of lateral interface components disposed along the side surfaces of the panel body.
In at least one embodiment, the panel body further comprises a cavity bounded by the rear surface, the right side surface and the left side surface, and the cavity is adapted to receive a panel of insulation material.
In at least one embodiment, the structure comprises a wall with an inner surface having upper and lower rails and the at least one wall panel has slits at upper and lower portions of the panel body between the front surface and the left and right surfaces where the slits are dimensioned to slidably engage the upper and lower rails to mount the at least one wall panel to the inner surface of the wall of the structure.
In at least one embodiment, at least one, the structure comprises a mobile medical unit housed in a shipping container and the first room is a first patient chamber in the mobile medical unit.
In at least one embodiment, the mobile medical unit includes a second patient chamber with a second airflow system, a middle wall that divides and fluidically seals the first and second patient chambers from one another, and the airflow systems are independently operable to allow the first and second patient chambers to have different pressure configurations.
In at least one embodiment, the first patient chamber is an Intensive Care Unit (ICU) or an Operating Room (OR).
In at least one embodiment, the first patient chamber includes first and second head wall units at first and second opposing walls, and the second wall is adjacent to the maintenance room.
In at least one embodiment, the airflow system of the first patient chamber includes a first air vent at an upper portion of the room to provide a conditioned air flow from the HVAC system to enter the first patient chamber, a second vent at a mid-portion of the room to receive a first portion of the conditioned air flow and recirculate it through the HVAC system and a lower vent to receive a second portion of the conditioned air flow and remove it from the patient chamber.
In at least one embodiment, the structure comprises a first shipping container and a second shipping container that are coupled to one another with at least one opening that is common to adjacent surfaces of the of the shipping containers and a seal that is disposed about the common opening to provide a pressure seal around the at least one opening.
In at least one embodiment, each opening comprise planar surfaces around the openings, the seal is positioned at one of the planar surfaces and the planar surfaces contact one another when the a first and second shipping containers are urged together.
In at least one embodiment, the planar surface are at least about six inches wide.
In at least one embodiment, the seal has a thickness of about two to three inches, and a width of about two to three inches.
In at least one embodiment, the at least one opening comprises opposing doorways.
In at least one embodiment, the seal is compressible.
In at least one embodiment, the seal comprises a neoprene rubber foam.
In at least one embodiment, the seal comprises closed cell foam.
In at least one embodiment, the first and second shipping containers are coupled together by mounting and tightening a clamp at corner castings of the shipping containers that are adjacent to one another.
In at least one embodiment, the structure is a compound structure comprising a plurality of mobile units formed from shipping containers or portions of shipping containers wherein adjacent units are coupled together with at least one seal therebetween to provide an airtight seal.
In at least one embodiment, the plurality of mobile units comprises at least one medical mobile unit, at least one hallway unit, at least one connection unit, at least one nurse station unit, at least one anteroom unit, and/or at least one pharmacy unit.
In at least one embodiment, a first portion of the compound structure comprises a first pair of mobile medical units with a first hallway unit disposed in between the first pair of mobile medical units.
In at least one embodiment, a second portion of the compound structure comprises a second pair of mobile medical units with a second hallway unit disposed in between the second pair or mobile medical units and the first and second hallway units are coupled to a connection unit to allow personnel to travel between the first and second portions of the compound structure.
In at least one embodiment, a first portion of the compound structure comprises a pair of mobile medical units, a pair of anteroom units, and a hallway unit where the anteroom units are disposed on either side of the hallway unit and the mobile medical units are disposed on either side of the anteroom units.
In at least one embodiment, the compound structure further comprises a nurse station unit that is coupled to the hallway unit.
In at least one embodiment, the nurse station unit is coupled to the hallway unit via a connector unit.
In at least one embodiment, the compound structure comprises second, third and fourth portions that are identical to the first portion and the nurse station unit is coupled to hallway units of the second, third and fourth portion.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a wall panel system for a structure, wherein the wall panel system comprises: at least one wall panel having a panel comprising: a front surface and a rear surface opposite the front surface; a right side surface and a left side surface opposite the front surface; and a lateral interlock system comprising a first lateral interlock interface that is disposed at the right side surface and a second lateral interlock interface that is disposed at the left side surface, each of the first and second lateral interlock interfaces comprising at least one lateral interface component; wherein the at least one lateral interface component of the first or second lateral interlock interface of the at least one wall panel is oriented to slidably engage at least one lateral interface component of a corresponding interlock interface of an adjacent wall panel to connect the at least one wall panel and the adjacent wall panel in a co-planar fashion to form a larger wall section.
In such cases, the wall panel system is further defined according to any of the embodiments described herein.
In at least one embodiment, the wall panel system is used in a structure which is a shipping container.
In another aspect, in accordance with the teachings herein, in at least one embodiment, there is provided a mobile medical unit comprising: a housing provided by a shipping container or portion thereof; a first room in the housing, the first room being a patient chamber; and an air flow system that is coupled to the room for providing conditioned air thereto and configuring the room to transition between any one of a positive air pressure configuration, a neutral air pressure configuration or a negative air pressure configuration relative to an environment that is external to the housing.
In such cases, the mobile medical unit is further defined according to any one of the embodiments described herein.
In another aspect, in accordance with the teachings herein, in at least one embodiment there is provided a compound structure comprising: a first shipping container; and a second shipping container, at least one opening that is common to both containers; and a seal that is disposed about the at least one opening; wherein the first and second shipping containers are coupled to one another such that the at least one openings are aligned and the first and second shipping containers are urged together during coupling to provide a pressure seal around the at least one opening.
In such cases, the compound structure is further defined according to any one of the embodiments described herein.
In such cases, the structure may be used as an educational structure including a classroom and/or a portable, a military structure, a correctional facility, a penitentiary structure, a testing and vaccination centre, a quarantine facility, a modular laboratory structure, a cleanroom, a long-term care facility, a natural disaster safe shelter, an indigenous community housing structure, a vertical farming structure, a grow room, a clean room, a mobile restaurant, a mobile bar, a cottage, a retail structure, a mining structure, a modular housing structure, a social housing structure or a remote community structure.
While the applicant's teachings described herein are in conjunction with various embodiments for illustrative purposes, it is not intended that the applicant's teachings be limited to such embodiments as the embodiments described herein are intended to be examples. On the contrary, the applicant's teachings described and illustrated herein encompass various alternatives, modifications, and equivalents, without departing from the embodiments described herein, the general scope of which is defined in the appended claims.
While embodiments of mobile medical unit 100 described and depicted herein are formed by dividing a shipping container 102 into independent halves, in alternative embodiments, a mobile medical unit, or other portable unit, may have a single, larger patient chamber or room, which may be stand-alone or may be connected to or be part of a larger portable, semi-permanent or permanent structure.
Furthermore, while various examples of mobile modules have been described and depicted above, other kinds of mobile modules may be incorporated into a compound structure or used in isolation on a site, including washroom module(s), pharmacy module(s), laboratory module(s), morgue module(s), step down or simple isolation module(s), clean room module(s), utility room module(s), module(s) to house medical gas(es) along with suction and power, and other kinds of modules.
In addition, while particular lengths and formats of shipping containers have been described and depicted herein, it will be understood that the principles described herein are applicable to modules having different dimensions, whether using a shipping container as a base, or whether being custom fabricated and also whether such modules are portable or stationary. Furthermore, there may be embodiments in which different structures may be used rather than shipping containers.
In at least one embodiment described herein, the portable unit 100 or other rooms, and the other modules which may be used with the portable unit 100 for forming portable, semi-permanent, or permanent compound structures of various configurations, may be constructed using fire-resistant construction techniques and materials. For example, the exterior and interior walls and the roof panels of the units and structures described herein may be coated with a fire-retardant spray to prevent damage to the interior of the unit. Alternatively, in at least one example, materials may be used that inherently have fire retardant properties.
Furthermore, while embodiments of compound structures described and depicted herein are single-level structures, alternatives are possible. For example, a compound structure may be assembled by vertically stacking at least two modules and facilitating entry and exit, maintenance and the like, on second, third etc. levels. This may be achievable for mobile units that can support the weight of another, or multiple, mobile units and that do not feature sensitive components such as HVAC equipment extending above or below the mobile units.
In addition, while particular airflow systems have been described and depicted, alternatives are possible that include more or fewer components. For example, ultraviolet (UV) light air cleaners may be placed in the airflow systems, and in particular in the return duct airstream. The UV lights will obstruct airflow somewhat, but the obstruction will not unduly affect providing airflow at proper and safe levels.
This application claims priority from U.S. Provisional Patent Application No. 63/055,538, filed on Jul. 23, 2020, which is hereby incorporated by reference in its entirety.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CA2021/051031 | 7/23/2021 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 63055538 | Jul 2020 | US | |
| 63071358 | Aug 2020 | US | |
| 63071359 | Aug 2020 | US | |
| 63071361 | Aug 2020 | US | |
| 63071395 | Aug 2020 | US |
