Patent Grant
10013873
This application claims the benefit and priority of Chinese Patent of Invention Application No. 201210202574.8, filed Jun. 15, 2012. The entire disclosure of the above application is incorporated herein by reference.
The present disclosure relates to systems and methods for connecting split HVAC systems (and/or for providing such connectivity) to the Internet and/or smart meters, thereby allowing a split HVAC system to be controllable via the Internet and/or a smart meter.
This section provides background information related to the present disclosure which is not necessarily prior art.
A common type of heating, ventilation, and air conditioning (HVAC) system is a multi-split HVAC system, which may also be generally referred to as a ductless system. A typical multi-split HVAC system includes indoor and outdoor units and a programmable thermostat. The thermostat may be external to and remotely located from the indoor and outdoor units.
Another type of HVAC system includes single-split wall-mounted air conditioners, which are commonly used in Asian. This example air conditioner includes an outdoor unit split from the indoor unit. The outside unit includes the compressor and is located outside the room. The indoor unit or air handler includes the evaporator and is located in the room.
This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
Disclosed are exemplary embodiments of systems and methods for connecting split HVAC systems (and/or for providing such connectivity) to networks and/or smart meters, thereby allowing a split HVAC system to be controllable via the Internet and/or a smart meter. An exemplary embodiment includes a system for use with a split HVAC system having at least one outdoor unit and at least one indoor unit having a receiver. In this exemplary embodiment, the system comprises a control having connectivity to a network and/or a smart utility meter. An equipment interface module is configured for wireless communication with the receiver of the at least one indoor unit and the control. The equipment interface module is operable for communicating instructions from the control to the receiver of the at least one indoor unit, thereby allowing operation of the at least one indoor unit to be controllable via the network and/or smart utility meter.
In another exemplary embodiment, a multi-split HVAC system generally includes a zone control, at least one outdoor unit, a plurality of indoor units each having an infrared receiver, and a plurality of radio frequency transceivers. Each radio frequency transceiver is configured for communication with the zone control via radio frequency signals and for communication with a corresponding one of the infrared receivers via infrared signals. The radio frequency transceivers are operable for communicating instructions from the zone control to the receivers, thereby allowing operation of all of the indoor units to be controllable by the zone control.
Another exemplary embodiment includes methods for wirelessly, remotely controlling split HVAC systems having at least one outdoor unit and at least one indoor unit. In an exemplary embodiment, a method generally includes remotely setting an instruction for the at least one indoor unit via a network, a smart meter, or a zone control. This example method also wirelessly transmits the instruction to an equipment interface module that converts the instruction to a command for the at least one indoor unit. This example method further includes wirelessly transmitting the command to a receiver of the at least one indoor unit, whereby operation of the at least one indoor unit may be controllable according to the command.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Example embodiments will now be described more fully with reference to the accompanying drawings.
In a split HVAC system, the indoor unit typically includes an onboard controller. A programmable thermostat may be configured to communicate with the onboard controller of the indoor unit. A wireless handheld remote control may be used to control the indoor unit, such as to program an operational set point for the indoor unit and/or to establish an operating mode for the indoor unit, e.g., on, off, heat, or cool.
With conventional multi-split HVAC systems having multiple ductless indoor units, the inventor hereof has recognized that each indoor unit is isolated and individually controlled via its own onboard controller. The inventor has also recognized that conventional single-split and multi-split HVAC systems do not have connectivity to services beyond the immediate structure, such as connectivity to the Internet and/or to smart energy or utility meters. Without such connectivity, conventional split HVAC systems are thus also not controllable via the Internet or via a smart meter.
Accordingly, the inventor hereof has developed and discloses herein exemplary embodiments of systems and methods for providing such connectivity to a split HVAC system, to thereby allow the split HVAC system to be connected to (and also controllable via) the Internet and/or a smart utility meter. As disclosed herein, the inventor's exemplary embodiments include a device configured to provide connectivity to the Internet and/or to smart meters, where the device is operable for bridging communications between one or more existing receivers (e.g., infrared receivers, etc.) of one or more indoor units and the Internet and/or a smart utility meter. The device may also be referred to herein as a bridge device, radio frequency (RF) transceiver, equipment interface unit or module, etc.
In an exemplary embodiment, a bridge device includes an intermediate radio frequency (RF) transceiver that simulates an existing infrared handheld remote controller's output. The RF transceiver includes a port (e.g., an infrared port, etc.) for sending commands or instructions to the onboard controller, etc. of the indoor unit(s) for controlling, e.g., changing, operation of the one or more outdoor units of the split HVAC system. Also in this exemplary embodiment, the RF transceiver is operable for communicating (two-way or bi-directional communications) with a thermostat or other controller, e.g., a programmable thermostat, zone control (e.g., zone control without an internal temperature sensor, etc.), etc. For example, the RF transceiver may communicate bi-directionally with a zone control or zone controller such that the RF transceiver may transmit and receive signals to/from the zone control (e.g., by using ZigBee Smart Energy communication protocol and/or Wi-Fi, etc.). The RF transceiver may also communicate with a conventional handheld infrared controller. For example, the RF transceiver may receive (but not send) signals (one-way communications) from the conventional handheld infrared controller. The RF transceiver may also be configured for one-way communication with one or more existing infrared receivers of the one or more indoor units, such that the RF transceiver may send (but not receive) signals to the infrared receiver(s). Accordingly, the RF transceiver can receive signals from the handheld infrared controller and then send those received signals to the infrared receiver. In some embodiments, the handheld infrared controller may also be used to send signals directly to an infrared receiver of an indoor unit, thus bypassing the RF transceiver. The thermostat (e.g., zone control, etc.) may be configured with connectivity to the Internet and/or a smart utility meter, such that the RF transceiver (and thus the indoor unit) is also connectable to the Internet and/or the smart utility meter via the connection to the thermostat. In this exemplary manner, connectivity to the Internet, to a smart utility meter, to smart energy thermostat, etc. may thus be provided without requiring or necessitating modifications for the receiver side of the split HVAC system.
Exemplary embodiments disclosed herein are operable to bridge the communication between infrared receivers of each indoor unit and a smart utility meter using an RF transceiver and a programmable control thermostat or zone controller, such that the HVAC system (e.g., and its multiple indoor units, etc.) can be controlled under a single controller. By providing connectivity to the Internet and/or smart utility meters, exemplary embodiments also allow control of HVAC systems using the Internet and/or the smart meters. For example, various units of an HVAC system may be controlled under a single controller, such that a user may easily change the operating mode, change temperature settings, turn the system on or off, etc. via the Internet.
With reference now to the figures,
In this example embodiment shown in
Continuing with this example embodiment, the transceiver 240 includes an emitter for sending instructions to an onboard controller of the indoor unit 210. The transceiver 240 also includes a collector for receiving instructions, e.g., from the handheld infrared remote control 220. In operation, the collector intercepts instruction signals from the handheld remote control 220 and may countermand the instruction, e.g., if contrary to an instruction from the zone controller 250. For example, if the instruction from the zone controller 250 indicates that the indoor unit 210 should be OFF while the instruction from the handheld remote control 220 indicates that the indoor unit 210 should be ON, then the transceiver 240 may receive via its collector the ON instruction from the handheld remote control 220 and send its own OFF instruction to the indoor unit 210 via its emitter so that the indoor unit 210 will maintain the OFF state as programmed by the zone controller 250.
The infrared receiver 230 is operatively coupled (e.g., installed, onboard, etc.) with the indoor unit 210. By way of example, the infrared receiver 230 may be the OEM infrared receiver that was originally built into or onboard the indoor unit 210. In operation as shown in
The zone controller 250 has a display device 252 (e.g., liquid crystal display (LCD) device, a touch screen, etc.) for displaying status information (e.g., 79 degrees Fahrenheit in
By way of example, the zone controller 250 may be powered by one or more batteries and by a power stealing technique which supplements the one or more batteries. As another example, the zone controller 250 may be continuously powered by line voltage.
With continued reference to
Continuing with this example, the smart meter 260 may be connected (e.g., using AMI Network, etc.) to an energy or utility provider 262. The utility/energy provider 262 may also be connected to an Administrative Dashboard 264 via the Internet. Accordingly, the utility/energy provider 262 may send instructions, requests and/or commands to the zone controller 250, such as a request for reduced operation or energy reduction to thereby have the zone controller 250 respond accordingly, e.g., discontinue use of one or more of the indoor units 210, etc.
Also shown in
In an exemplary embodiment, a zone controller 250 has programmed schedules and set point temperatures for each remote zone, which schedules and set point temperatures may be the same or different for the various zones. In this example, indoor units 210 may each include their own thermostat and internal temperature sensor (e.g., thermistor, etc.) as part of its built-in control. The zone controller 250 does not include a temperature sensor in this example. In operation, the temperature sensor of each indoor unit 210 senses the current indoor temperature for its respective zone. Then, the onboard control of each indoor unit 210 compare the sensed temperature for its zone with the set point temperature it received from the zone controller 250 via the transceiver 240. This comparison is used by the onboard controller of the indoor unit 210 to command and operate the indoor unit 210 as a function of the comparison, e.g., to determine whether to turn ON or OFF the indoor unit 210 or to determine whether to enter a heat cycle or cool cycle.
In another exemplary embodiment, the zone controller 250 includes a temperature sensor. In this example, the zone controller 250 sends sensed temperature to the equipment interface modules or units (e.g., transceivers 240, etc.). The equipment interface units compares a set point temperature (e.g., stored in its local memory, etc.) with the sensed temperature received from the zone controller 250. This comparison is then used by the equipment interface units to determine the commands, instructions, etc. to send to the indoor unit 210 for operating the indoor unit 210 as a function of the comparison, e.g., to determine whether to turn ON or OFF the indoor unit 210 or to determine whether to enter a heat cycle or cool cycle.
Aspects of the present disclosure also relate to exemplary operating processes or methods for controlling a split HVAC system according to an exemplary embodiment. In an example method, instructions are initially set or programmed for the operation of the one or more indoor units of the split HVAC system. These instructions may be set, for example, by a user (e.g., homeowner, etc.) entering the instructions via a programmable thermostat or a zone control (e.g., zone controller 250, etc.) or via the Internet by accessing an application, tool, platform, etc. The instructions may also or alternatively be set by a utility/energy provider via a smart meter (e.g., smart meter 260, etc.). When the instructions are set via the Internet or via a smart meter, the instructions are conveyed, transmitted, or communicated to the zone controller. The zone controller, in turn, conveys, transmits, or communicates the instructions to an equipment interface unit or module (e.g., via RF signals to an RF transceiver 240, etc.). The equipment interface unit converts the instructions to an appropriate command for the indoor unit and conveys, transmits, or communicates the command to the indoor unit (e.g., via infrared signals to a receiver 230 of an indoor unit 210, etc.). The receiver then conveys, transmits, or communicates the command to the indoor unit.
Aspects of the present disclosure also relate to exemplary embodiments of methods for comparing a sensed temperature with a set point temperature for turning on or off the system, changing an operating mode, etc. In an example method, a zone control (e.g., zone controller 250, etc.) conveys, transmits, or communicates a set point temperature to an equipment interface unit or module (e.g., an RF transceiver 240, etc.), which may store the set point temperature in a local member. The equipment interface unit may include a temperature sensor that senses the temperature of the zone, room, or interior space in which the equipment interface unit and indoor unit is located. Alternatively, the equipment interface unit may receive a sensed temperature from a remote temperature sensor, e.g., a temperature sensor internal to or an onboard thermostat of an indoor unit, a temperature sensor internal to the zone control, etc. The equipment interface unit compares the sensed temperature with the set point temperature received from the zone controller. If the sensed temperature is higher than the set point temperature, the equipment interface unit conveys, transmits, or communicates an ON command to the indoor unit (e.g., via IR signal to an IR receiver 230, etc.) to start a cool cycle or a command to change from a heat cycle to a cool cycle. If the sensed temperature is lower than the set point temperature, the equipment interface unit conveys, transmits, or communicates an OFF command to the indoor unit to stop the cool cycle and/or a command to change from the cool cycle to a heat cycle.
In another exemplary embodiment of a method, a temperature sensor in a zone control senses the temperature of the inside space. The zone control conveys, transmits, or communicates the sensed temperature to an equipment interface unit or module (e.g., an RF transceiver 240, etc.). The equipment interface unit compares a set point temperature (e.g., stored in a local memory, etc.) with the sensed temperature received from the zone control. If the sensed temperature is higher than the set point temperature, the equipment interface unit conveys, transmits, or communicates an ON command to the indoor unit (e.g., via IR signal to an IR receiver 230, etc.) to start a cool cycle or a command to change from a heat cycle to a cool cycle. If the sensed temperature is lower than the set point temperature, the equipment interface unit conveys, transmits, or communicates an OFF command to the indoor unit to stop the cool cycle and/or a command to change from the cool cycle to a heat cycle.
Accordingly, exemplary aspects of the present disclosure are directed towards a common control for a multi-split HVAC system (ductless system), in which a single device is able to replace the individual indoor unit controls which are typically provided with a ductless system. The indoor unit typically has a wireless remote control which is used to program an operational set point for the unit and to establish the operating mode, e.g., heat, cool, on, or off. In exemplary embodiments, a common control (e.g., programmable thermostat, zone control, etc.) is installed in a centralized or central location of a home, apartment, etc. The control communicates wirelessly to an equipment interface unit, module, or device that is attached to an indoor unit of the HVAC system. The interface module (e.g., RF transceiver, etc.) receives a wireless command from the control and then converts the command into the appropriate command for the indoor unit. The indoor unit is configured to receive instructions via an IR signal. The OEM (original equipment manufacturers) handheld wireless remote control units typically use an IR communication scheme for programming of the indoor unit. Thus, the interface module is configured to use the same method to transmit commands to the indoor unit as the OEM remote control. The interface module may thus have to “learn” the specific command sets of a specific ductless system in which it is being used.
In addition to being able to send commands to one or more indoor units, the control is also configured (e.g., has an antenna, radio, etc.) for connection to the Internet and/or a smart meter. This enables a user to remotely access the settings in the control (e.g., set or change the settings, etc.). This also or alternatively enables a utility provider (e.g., energy company, etc.) to send a command for energy reduction to the control, to thereby have the control respond accordingly, e.g., discontinue use of the ductless HVAC system, etc.
The control itself may be powered by a power stealing technique, which may supplement one or more batteries. Or, the control may be continuously powered by line voltage. The interface module (e.g., RF transceiver, etc.) may have a solar power supply, which charges one or more batteries or capacitors to extend operational life.
Exemplary embodiments disclosed herein may be configured with the ability to allow a control (e.g., programmable thermostat, zone control, control with or without an internal temperature sensor, etc.) to operate multiple units of a ductless system, such as a ductless system having one outdoor compressor and multiple indoor units or a ductless system having two or more indoor units each with its own outdoor unit. Accordingly, exemplary embodiments may thus provide connectivity to the Internet and/or to a smart utility meter, remote access, and/or multiple unit control capability.
Exemplary embodiments may include equipment interface modules having separate infrared emitters and collectors. The emitter is operable for sending instructions to the onboard control of an indoor unit via the IR protocol. The collector is operable to intercept and countermand signals from a handheld IR remote control, e.g., an OEM remote control that originally came with a ductless unit. For example, if the control has indicated the ductless unit should be off, the user might be able to override that OFF command using a local handheld IR remote control. In exemplary embodiments, however, an equipment interface module is configured to sense via its collector the ON command from the IR handheld remote control unit, and then immediately send its own OFF signal via its IR emitter to maintain the programmed OFF state.
In an exemplary embodiment the control is a zone control that does not have an internal temperature sensor. Because each indoor unit in a ductless system typically has its own thermostat and temperature sensor as part of its built-in control. Therefore, the zone control does not also need an internal temperature sensor. The zone control may be operable to maintain a programmed schedule (e.g., wake, leave, return, sleep or home, sleep, away, etc.), the set point temperature for each remote zone, and the state (ON or OFF) for each remote zone. Then, the onboard controllers in each of the indoor units would use this set point information to determine when to turn on and off. The indoor unit controller may have a set point and dead band around the set point, which is used to determine whether to enter a heat or cool cycle.
In an exemplary embodiment, there may be a temperature sensor in the equipment interface unit or module. The equipment interface unit may be configured and be operable to compare a stored set point (received from the zone control) to a sensed temperature received from its own temperature sensor. When the sensed temperature is beyond a first predetermined amount (e.g., 1.5° F., etc.) of the stored set point temperature, the equipment interface unit may the send an ON command to the onboard control of the indoor unit. When the sensed temperature is within a second predetermined amount (e.g., 0.5° F., etc.) of the stored set point temperature, the equipment interface unit sends an OFF command to the onboard control of the indoor unit.
Another exemplary embodiment includes a zone control having a temperature sensor. In this example, the zone control is operable for sending the sensed temperature to each of the interface units installed to the indoor units of the HVAC system. Each interface unit may then compare the value of the sensed temperature it received from the zone control to a stored set point, and then command the indoor unit (to which it is installed) as a function of the comparison. Accordingly, this exemplary embodiment thus makes use of the inherent control abilities of the indoor unit onboard controllers.
In an exemplary embodiment, the equipment interface unit or module comprises an RF transceiver configured for two-way communications with a programmable control thermostat and configured for one-way communication with an existing infrared receiver of an indoor unit. A homeowner may still use the OEM remote control, e.g., as shown in
Exemplary embodiments disclosed herein may provide one or more (but not necessarily any or all) of the following advantages. For example, exemplary embodiments disclosed herein include devices operable to convert a collection of single unitary ductless units into a zoned system under the control of a single thermostat. Also in exemplary embodiments, such devices may also be used to make the converted zoned system available for control via the Internet, a smart energy meter, etc. With exemplary embodiments, an HVAC system may thus be controlled remotely with a smart meter and/or over the Internet, e.g., by a home owner or other user using a computer or Internet-enabled portable device, such as a smart phone, laptop, tablet, Blackberry® device, Android® device, an iPhone® device, iPad® tablet, etc.
Also by way of example, exemplary embodiments may enable connection of an infrared controlled air conditioner to a smart energy application (e.g., demand response/load control (DRLC), etc.) and/or may enable a homeowner to remotely control the HVAC system via a portable communication device (e.g., smart phone or device mentioned above, etc.), a personal computer, etc. Exemplary embodiments may enable a service software company to optimize home owner's energy consumption and comfort level. Also, exemplary embodiments may allow a service provider for the HVAC system to remotely optimize the system with the proper software and/or software update, etc. Exemplary embodiments may be easily installed or retrofitted as a simple add-on without having to cut wiring during installation. Exemplary embodiments may include an RF transceiver with a solar panel such that the RF transceiver has a relatively long lasting life. Exemplary embodiments may not require or need a homeowner to run the learning routine for the RF transceiver to learn the infrared remote controller. The work can be done via a computer or other device because the service platform can find homeowner's infrared remote controller's type and automatically download to the RF transceiver.
Exemplary embodiments disclosed herein may be used with various configurations of HVAC systems. By way of example, exemplary embodiments may be used with single-split systems or multi-split HVAC systems, such as a ductless system with one outdoor unit/compressor and multiple indoor units, a ductless system with two or more indoor units each with its own outdoor unit, a unitary ductless air conditioning or heat pump system with one outdoor unit and one indoor unit programmed by an infrared handheld unit, single-split wall-mounted air conditioner, single-split heat pump system, window room air conditioner, etc. Exemplary embodiments may also be used with a forced air system. For example, an exemplary embodiment includes a thermostat for a forced air system, where the thermostat has a zone control provision to enable the control of a remote ductless system such as a single-split system or a window air conditioner.
Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms, and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail. In addition, advantages and improvements that may be achieved with one or more exemplary embodiments of the present disclosure are provided for purpose of illustration only and do not limit the scope of the present disclosure, as exemplary embodiments disclosed herein may provide all or none of the above mentioned advantages and improvements and still fall within the scope of the present disclosure.
Specific dimensions, specific materials, and/or specific shapes disclosed herein are example in nature and do not limit the scope of the present disclosure. The disclosure herein of particular values and particular ranges of values for given parameters are not exclusive of other values and ranges of values that may be useful in one or more of the examples disclosed herein. Moreover, it is envisioned that any two particular values for a specific parameter stated herein may define the endpoints of a range of values that may be suitable for the given parameter (i.e., the disclosure of a first value and a second value for a given parameter can be interpreted as disclosing that any value between the first and second values could also be employed for the given parameter). Similarly, it is envisioned that disclosure of two or more ranges of values for a parameter (whether such ranges are nested, overlapping or distinct) subsume all possible combination of ranges for the value that might be claimed using endpoints of the disclosed ranges.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms “a”, “an” and “the” may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “comprising,” “including,” and “having,” are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being “on”, “engaged to”, “connected to” or “coupled to” another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly engaged to”, “directly connected to” or “directly coupled to” another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. The term “about” when applied to values indicates that the calculation or the measurement allows some slight imprecision in the value (with some approach to exactness in the value; approximately or reasonably close to the value; nearly). If, for some reason, the imprecision provided by “about” is not otherwise understood in the art with this ordinary meaning, then “about” as used herein indicates at least variations that may arise from ordinary methods of measuring or using such parameters. For example, the terms “generally”, “about”, and “substantially” may be used herein to mean within manufacturing tolerances.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as “inner,” “outer,” “beneath”, “below”, “lower”, “above”, “upper” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements, intended or stated uses, or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
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