The present invention relates to a wall-mounted spray head unit for delivering a fire suppressant liquid and to a fire suppression system comprising at least one wall-mounted spray head unit.
The present invention also relates to a wall-mounted unit for a control hub for a building or part of a building, such as a home, office, shop, hospital or other venue used by people.
A fire-suppression system which uses a targeted water mist spray offers an effective alternative to a conventional sprinkler system. Such a system offers a range of benefits. For example, it can operate with a much-reduced water flow requirement compared to a conventional sprinkler system and, thus, can cause less water damage when activated. The system can be easier, cheaper and less disruptive to retrofit in an existing property. An example of such a fire suppression system can be found in WO 2017/191443 A1.
According to a first aspect of the present invention there is provided a wall-mountable spray head unit. The spray head unit comprises a rotatable spray head assembly comprising a spray manifold rotatable about a first axis, and a spray nozzle supported by the spray manifold and orientated to deliver fire-suppressant material (such as water or an aqueous solution) radially in a plane defined by the first axis and a second axis which is perpendicular to the first axis. The spray head unit also comprises one or more fire-locating sensors for guiding the rotatable spray head assembly. The one or more fire-locating sensors include a visible-light camera and/or a microphone.
Thus, the visible-light camera and/or microphone can be used to sense and locate non-thermal signs of fire, such as the appearance of smoke and/or the sound of fire (for example in the form of crackle and/or hiss).
Preferably, the one or more fire-locating sensors is/are directed in the plane. Thus, the sensors can move with the spray nozzle.
The visible-light camera may comprise a lens and a hydrophobic coating on the lens.
The spray head unit may further comprise a thermal sensor directed in the plane. Thus, the thermal sensor can be used to confirm the presence of fire.
The visible-light camera and/or microphone may be mounted on the spray manifold so as to move with the spray nozzle.
The first axis may be a substantially vertical axis and the plane may be a substantially vertical plane. The spray manifold may be only rotatable about the first axis.
The spray head unit may further comprise an output device, such as a display, and a controller or input configured to cause the output device to output real-time information. This can help encourage inspection of the spray head unit and, thus, help ensure that the spray head unit is in working order. The output device may be a speaker. The spray head unit may comprise more than one different types of output device.
The head unit may comprise a spray nozzle. There may be first and second paths to the spray nozzle for delivering first and second liquids to the spray nozzle. The first and second liquids may be different. For example, the first liquid may be water and the second liquid may be a perfume, a fire suppressant material or a marker, or a mixture containing water and a fire suppressant material or a marker.
The head unit may comprise at least two spray nozzles. A first spray nozzle of the at least two spray nozzles may deploy a first liquid of a first droplet size and a second nozzle may deploy a second liquid of a second droplet size. The first and second liquids may be different. For example, the first liquid may be water and the second liquid may be a perfume, a fire suppressant material or a marker, or a mixture containing water and a fire suppressant material or a marker. The first and second droplet sizes may be different. For example, a first nozzle may deploy droplets of water or a mixture containing water of a relatively small size and a second nozzle may deploy droplets of water or a mixture containing water of a relatively large size.
Droplet size of about 0.020 inches (0.5 mm) can be used for systems using very high water volume. This can be used in low-pressure misting systems.
Droplet size of about 0.016 inches (0.4 mm) can be used for systems where airflow and clearance allow for complete evaporation and where higher water volume is used. This can be used in low- and medium-pressure misting systems.
Droplet size of about 0.012 inches (0.3 mm) can be used for most systems. It can be used in both open and enclosed areas with complete evaporation. It provides similar results to the 0.008 inch nozzle, but with more water. This can be used in medium-pressure misting systems.
Droplet size of about 0.008 inches (0.2 mm) can be used to help reduce the volume of water used. It results in less moisture and can encourage evaporation. This can be use in high-pressure misting systems, generally at or above 250 psi/17 bar (1,700 kPa).
Droplet size of about 0.006 inches (0.15 mm) can be used for help reduce the volume of water used still further. This can be use in high-pressure misting systems, generally at or above 500 psi/34 bar (3,400 kPa).
The wall-mountable spray head unit may include a wireless network interface, for example, to enable wireless connection via WiFi and/or mobile phone network.
The wall-mountable spray head unit may include a replaceable reservoir or a fillable reservoir for holding an additive. The wall-mountable spray head unit may be configured to controllably add the additive to the fire-suppressant material. The additive may be a wetting agent. The additive may be a perfume.
According to a second aspect of the present invention there is provided a wall-mountable spray head unit. The wall-mountable spray head unit comprises a rotatable spray head assembly which comprises a spray manifold rotatable about a first axis and a spray nozzle supported by the spray manifold and orientated to deliver fire-suppressant material radially in a plane defined by the first axis and a second axis which is perpendicular to the first axis, one or more fire-locating sensors, an output device and a controller configured to cause the output device to output real-time information.
The real-time information may include a current time and/or weather report. The real-time information may include information regarding a system check. The real-time information includes directions, for example, regarding fire escape.
The real-time information may include a heat map and, optionally, an image of the room with the heat map. This can be used to help manage energy use by identifying cold spots and/or hot spots and so allow a user to take corrective measures.
The spray head unit may have different modes and the controller may be operable to output different information in different modes.
The spray head unit may further comprise an input device, such as a push button or a touch switch. The input device may be a touch screen or panel. This can help encourage use of the spray head unit and, thus, help ensure that the spray head unit is in working order.
The spray head unit may be configured to determine whether a user, in response to a prompt, has provided an input to the input device, optionally, within a given time period. The prompt may be provided via the output device comprised in the spray head unit or via a mobile device, e.g. via a text, e-mail or other notification.
The spray head unit may comprise a controller configured to deploy fire-suppressant material in response to a trigger. A threshold for the trigger depends on an angle of rotation of the spray manifold. For example, a lower threshold may be used close to a wall, for instance up to 20°.
According to a third aspect of the present invention there is provided a wall-mountable spray head unit. The wall-mountable spray head unit comprises a rotatable spray head assembly which comprises a spray manifold rotatable about a first axis and a spray nozzle supported by the spray manifold and orientated to deliver fire-suppressant material radially in a plane defined by the first axis and a second axis which is perpendicular to the first axis, one or more fire-locating sensors, a controller configured to cause deployment of fire-suppressant material in response to a trigger, wherein a threshold for the trigger depends on an angle of rotation of the spray manifold.
The spray head unit may comprise a controller configured to deploy fire-suppressant material in response to a triggering event at a first angular position. The controller may be configured to deploy the fire-suppressant material at a second, different, predetermined angular position before the first angular position. This can be used to deploy protective cover or a barrier for a high-risk or high-worth article, such as a gas pipe.
According to a fourth aspect of the present invention there is provided a wall-mountable spray head unit. The wall-mountable spray head unit comprises a rotatable spray head assembly which comprises a spray manifold rotatable about a first axis and a spray nozzle supported by the spray manifold and orientated to deliver fire-suppressant material radially in a plane defined by the first axis and a second axis which is perpendicular to the first axis, one or more fire-locating sensors, a controller configured to deploy the fire-suppressant material at a second, different, predetermined angular position before the first angular position.
A subject or article of importance may be located at the second, different angular position. Thus, deployment of the fire-suppressant material can be used to provide a protective cover over the high-risk or high-worth article, or subject (e.g., a person or animal).
The second, different angular position may intersect the first angular position and a third angular position at which a subject or article is located. Thus, deployment of the fire-suppressant material can be used to provide a protective barrier between the fire and the high-risk or high-worth article, or subject.
According to a fifth aspect of the present invention there is provided a system comprising a wall-mountable spray head unit comprising a rotatable spray head assembly which comprises a spray manifold rotatable about a first axis and a spray nozzle supported by the spray manifold and orientated to deliver fire-suppressant material radially in a plane defined by the first axis and a second axis which is perpendicular to the first axis, and one or more fire-locating sensors for locating a fire in a room, the one or more fire-locating sensors including a thermal sensor, wherein the room is scannable with the thermal sensor so as to generate a heat map of the room.
Thus, the wall-mountable spray head unit can be used not only as a safety device, but also as an energy management tool.
The wall-mountable spray head unit may gather and optionally record information about location of occupants (which may be identified since they have a heat signature). This information may be provided to a display or transmitted to a remote device, such as a portable computer (for example in the form of a tablet computer), which can be used to help guide fire fighters.
The wall-mountable spray head unit may gather and optionally record information about heat profile for a room. This information may be provided to a display or transmitted to help control air flow in a building for smote venting. The information may be provided to a ventilation system controller for controlling air flow in a building.
The wall-mountable spray head unit may include a wireless network interface, for example, to enable wireless connection via WiFi and/or mobile phone network.
The wall-mountable spray head unit may further comprise a display, wherein the wall-mountable spray head unit is configured to show the heat map.
The wall-mountable spray head unit may further comprise a network interface for transmitting the heat map to a remote location.
According to a sixth aspect of the present invention there is provided a method of locating a fire using a unit comprising a temperature sensor mounted on a rotatable support. The method comprises performing a first scan by rotating the support between first and second angular limits (for example, 25° and 155° respectively) and recording a temperature at each of a plurality of angles to obtain a first measurement of temperature against angle. The method comprises determining whether any temperature in the first measurement exceeds a predetermined threshold and, upon a positive determination, causing deployment of fire suppressant material. The method comprises performing a second scan by rotating the support between the first and second angular limits and recording a temperature at each of a plurality of angles to obtain a second measurement of temperature against angle. The method comprises comparing a temperature for each angle in the first measurement with a temperature for a corresponding angle in the second measurement and determining whether the difference exceeds a predetermined threshold and, upon a positive determination, causing deployment of fire suppressant material. The method may further comprise comparing the temperature differences with temperature difference from another different unit and determining whether a temperature differences from the other unit is larger and flagging a result of the determination.
The method may further comprise smoothing the function.
According to a seventh aspect of the present invention there is provided a computer program comprising instructions which, when performed by a processor, causes the processor to perform the method.
According to an eighth aspect of the present invention there is provided a computer program product comprising a computer-readable medium (e.g. a non-transitory computer-readable medium, such as memory) storing the computer program.
According to a ninth aspect of the present invention there is provided a wall-mounted unit for a control hub for connected devices in a building or part of a building. The wall-mounted unit preferably comprises at least one spray nozzle for delivering fire-suppressant material (such as water or an aqueous solution). The spray head unit comprises one or more sensors for gathering thermal information for a room or space, and an output device for providing a user with information and an input device for receiving a user input.
According to a tenth aspect of the present invention there is provided a system comprising the wall-mounted unit, a controller in communication with the wall-mounted unit and a wireless interface. The wireless interface may be integrated into the wall-mounted unit or controller.
Certain embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
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The system 1 includes at least one fire detector 2, a main controller 3, one or more pressure generators 4 (or “pumps”) for supplying fire suppressing material 5, in this example water, from a source 6 via piping 7 to at least one rotatable spray head assembly 8 (herein also referred to simply as a “spray head”). The main controller 3 may be omitted or its functions may be implemented by the spray heads 8. The fire detector 2 and the spray head(s) 8 may be co-located in one space 9, for example, a room. The fire detector 2, main controller 3 and/or spray head(s) 8 are connected by a communication network 10, for example, an Ethernet-over-powerline network. The system 1, however, may include dedicated point-to-point communication link(s) (not shown). For example, the fire detector 2 and main controller 3 may be connected by a separate, dedicated wired link. The general principle of operation of the system is described in WO 2010/058183 A1 and WO 2017/191443 A1 which are incorporated herein by reference.
The system 1 is connected to a network 10, for example, the Internet. This can allow a user device 12, such as a mobile phone, tablet, laptop computer or other form of computer, to access the system 1 or a server 13 which can serve information about the system 1 to the user device 12.
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Multiple spray head units 14 co-operate to suppress a fire using targeted jets of watermist. The pressure generator(s) 4 provide the pressure on demand to allow watermist to be created by one or more of the multiple spray heads 8.
Further details about the spray head unit 14, in particular the mechanical construction, can be found in WO 2017/191443 A1 which is incorporated herein by reference.
As will be explained in more detail later, the system 1 can be used for safety-related applications. For example, it can provide emergency signage in the case of fire, early warning alarm (for example, warning of a possible fire in given zone), and/or provide fire prediction by monitoring temperatures. The system 1 can provide maintenance alerts, be used to provide remote room visibility assessment, provide automatic fire service notification, and/or even be used to help find locate occupants in the home in the case of an emergency.
The spray head unit 14 can be used as a user interface unit for a control hub (“smart home hub”) for connected devices in a building or part of a building. It can be used for temperature monitoring and temperature control. The spray head unit 14 can be employed for user testing and verification and for fire safety planning. Enhancing functionality of the spray head unit 14 can increase user engagement. Increasing user engagement can promote uptake of the system 1 and can help ensure that the system 1 is maintained.
The system 1 can also be used for non-fire-related applications.
The system 1 can be adapted and used to deploy a security marker. In particular, the system 1 may include first and second paths (not shown) between a water inlet (not shown) and pump each path individually selectable. The second path may be provided with a reservoir (not shown) for holding a marker (not shown) and a mixer unit for adding the marker to water. Further details can be found in WO 2015/49500 A1 which is incorporated herein by reference.
Additionally or alternatively, the system 1 can be adapted and used to be used a humidifier. Similar a security marker arrangement, the system 1 may include an additional path (not shown). The additional second path may be provided with a reservoir (not shown) for holding a perfume (not shown) and a mixer unit for adding the perfume to water. The spray head unit may operate at a different pressure. In some embodiments, the spray head unit 14 may include an additional nozzle (not shown).
The system 1 may be connected to a heating, ventilation and air conditioning (HVAC) system (not shown). The spray head control unit 25 (
The fire suppression system 1 includes multiple wall-mountable spray head units 14 with rotatable spray head assemblies 8.
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The spray head unit 14 comprises a rotatable spray head assembly 8 which can turn on one, vertical axis. The rotatable spray head assembly 8 comprises an elongate box-shaped manifold 19 (
The rotatable spray head assembly 8 is mounted on a base (not shown) and is driven by an actuator 24 (
As will be explained in more detail later, the sensors 21, 22, 23 can include a thermal sensor 21, for example, in the form of an infrared pyrometer or infrared array sensor (for instance, with 4×4 pixels). The sensors 21, 22, 23 include a visible-light camera 22 and/or a directional microphone 23 for detecting non-thermal signs of fire, such as the appearance of smoke and/or the sound of fire (for example in the form of crackle and/or hiss) which can help to identify the presence of a fire early.
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Each spray head unit 14 includes a thermal sensor 21, a visible-light camera 22 and/or a microphone 23. Each spray head unit 14 also includes at least one output device 35, for example in the form of a display 35, such as an LCD or OLED screen, and which may be a touch display. Each spray head unit 14 may also include other output devices, such as a speaker 36. Each spray head unit 14 also includes an input device 37, for example, in the form of a push button. Each spay head unit 14 may include a wireless network interface 38 for providing an interface to one or more wireless networks such as WiFi, a mobile phone network and BlueTooth®. This can help enable the controller unit 25 to connect to other connectable devices such as thermostats. The spray head unit 14 to be used a controller (or “smart hub”) for the building or part of the building.
The rotatable head assembly 8 can be swept back and forth under the control of software 30 to cause the head to be pointed at a wide range of locations within a room. As will be explained in more detail hereinafter, the head assembly 8 need not always be oriented and water mist deployed first at the fire, at an angle (or “first angular position”). Instead, the water mist can be oriented at an important object or subject so as to cover the object or subject in water first, or to lay down a protective barrier between the fire and the object or subject.
The visible-light camera 22 or microphone 23 can be used to identify the presence of a fire. For example, image recognition software can be used to identify flame or smoke. Suitable image recognition software is FireVu 500® available from FireVu (Northwich, UK). Similarly, sound recognition software can be used to identify crackle or hiss, and suitable sound recognition software is ai3® available from Audio Analytic (Cambridge, UK).
The spray heads 14 can be linked to an activating alarm and can start scanning. A scan may include measurement of temperature at each point in an arc with the head facing at an angle of 25 to 155° from parallel with the wall 15 of installation. The measurements in a scan can be smoothed using a convolutional filter to reduce the effects of temperature sensor jitter and moving bodies within the room.
A first scan can establish a baseline temperature for each angle of the scan which is used to calculate a differential increase on following scans. An exceptionally high-temperature reading may cause an activation following the first scan. Subsequent scans measure the increase in temperature for each angle of the scan. Once the temperature at an angle exceeds a threshold that head is deemed to have successfully located a fire. All heads which locate a fire during a scan are then compared to see which has the best view. Selection is based on the highest temperature differential observed.
Each spray unit 14 may include a valve, for example, as described in WO 2017/191443 A1, or in a separate manifold to direct flow of fire-suppressant material where it is required. One or more devices 103, 104 (
As will be explained in more detail, the system can be used to provide a mist for cooling, a fine mist for watering plants, acting as a humidifier, to provide perfume or room fragrances, or to provide a security tagging agent, maybe even industrial cleaning, or as a humidifier.
The spray head unit 14 can be used as a home hub. It can be connected to other smart home devices, for example, via network interface 34 or via wireless network interface 38. For example, the system 1 can be connected to a smart thermostat (not shown) or a smart alarm system (not shown). The spray head 8 may be connected to the Internet to display information and or alert emergency services or an insurer via WiFi or wireless network interface 38 in the spray head unit 14.
A fire-suppression system can benefit from being inspected at regular intervals (for example, quarterly) to ensure that each spray head unit 14 is operating and not obstructed. Furthermore, the fire-suppression system is more likely to be embraced by user if it is seen as being more than just a safety system. Moreover, a fire-suppression system is more likely to be installed through choice, if the user has greater control over operation of the system.
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The heat map 45 may be a composite image comprising an image of the room 47 and a heat map 48 comprising colour-coded tiles 49 (for example, ranging from red to blue). In
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When the system 1 is installed, a floor plan 52 (or “map”) of the dwelling or premises is uploaded to the main controller 3 or the server 13, and locations of spray head units 14 are recorded.
The main controller 3 or server 13 generates a report 51, e.g. periodically (for instance every quarter), in response to a request and/or in response to an event and provides the report 51 which shows the location and status of each spray head unit 14. The status of each spray head unit 14 can be represented using a traffic light colour system. For instance, green can represent proper working order (or “OK”), yellow may indicate that attention is required, such as a test is required, and red may indicate a possible fault or the need for a technician to inspect the unit. The report 51 may provide a provide a dashboard 53 providing a summary of the statuses of the spray head units 14 and system statistics.
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When the system 1 is installed, a floor plan 52 (or “map”) of the dwelling or premises is uploaded to the main controller 3 or the server 13, and locations of spray head units 14 are recorded.
The main controller 3 or server 13 generates a report 61, e.g. periodically (for instance every day), in response to a request and/or in response to an event and provides the report 61 which shows the location and a fan-like, colour-coded map 62 comprising sectors 63 whose colour indicates absolute or relative temperature measured by each spray head unit 14. In
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The spray head controller 26, however, can be programmed to deploy water mist at other angular positions first, before returning to the fire and deploying water mist towards the fire itself. There may be two reasons for following this approach. First, it might be preferable to provide protective cover, for example, over an occupant in the room or over fire-hazardous articles, such as gas pipes, in the room. Alternatively, rather than provide water mist directly over the subject, a protective barrier region of water mist may be provided between the fire and the subject.
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Humidification can be carried out periodically, e.g. daily or weekly, and/or on demand by the user by activating a menu (not shown) displayed on display 35 (
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The spray head face plate 16 (
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The system 1 may gather and optionally record information about heat profile for a room. This information may be provided to a display, for example display 35 (
It will be appreciated that various modifications may be made to the embodiments hereinbefore described. Such modifications may involve equivalent and other features which are already known in the design, manufacture and use of fire-suppression systems and component parts thereof and which may be used instead of or in addition to features already described herein. Features of one embodiment may be replaced or supplemented by features of another embodiment.
Although claims have been formulated in this application to particular combinations of features, it should be understood that the scope of the disclosure of the present invention also includes any novel features or any novel combination of features disclosed herein either explicitly or implicitly or any generalization thereof, whether or not it relates to the same invention as presently claimed in any claim and whether or not it mitigates any or all of the same technical problems as does the present invention. The applicants hereby give notice that new claims may be formulated to such features and/or combinations of such features during the prosecution of the present application or of any further application derived therefrom.
Number | Date | Country | Kind |
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1812557.5 | Aug 2018 | GB | national |
Filing Document | Filing Date | Country | Kind |
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PCT/GB2019/052103 | 7/26/2019 | WO | 00 |