GB2472084A - Radiator control apparatus - Google Patents

Radiator control apparatus Download PDF

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Publication number
GB2472084A
GB2472084A GB0912886A GB0912886A GB2472084A GB 2472084 A GB2472084 A GB 2472084A GB 0912886 A GB0912886 A GB 0912886A GB 0912886 A GB0912886 A GB 0912886A GB 2472084 A GB2472084 A GB 2472084A
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GB
United Kingdom
Prior art keywords
radiator
power
control
generating
arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0912886A
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GB0912886D0 (en
Inventor
Andrew Simon Clegg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0912886A priority Critical patent/GB2472084A/en
Publication of GB0912886D0 publication Critical patent/GB0912886D0/en
Publication of GB2472084A publication Critical patent/GB2472084A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
    • G05D23/1905—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value associated with tele control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Selective Calling Equipment (AREA)

Abstract

An apparatus 106 adapted to control a radiator 100 comprises a receiving device (210, fig.2) for receiving a radiator control signal from a remote device 108. The apparatus further includes an adjusting device (212, fig.2) for adjusting the radiator in accordance with the control signal, a power supply (204, fig.2), and at least one arrangement 110, 112 for generating power for the power supply. Preferably, the power generating arrangement generates power using thermal energy emitted by the radiator and may comprise a Seebeck thermoelectric device 112 connected to a surface of the radiator. Advantageously, the power generating arrangement generates power using solar energy and may comprise a solar panel 110 connected to, or fitted on, the radiator control apparatus. The adjusting device may comprise a motor arranged to adjust a control valve 104 of the radiator. Preferably, the power supply includes a low impedance super-capacitor.

Description

Radiator Control The present invention relates to controlling at least one radiator.
Conventional radiators include thermostatic valves that allow a user to control their temperature. These tend to be simple manual devices and users normally have to individually set the valve of each radiator in a building. This can be particularly inconvenient if the weather is fluctuating frequently and quite often users tend to not to adjust the valves, leading to energy inefficiency.
Embodiments of the present invention are intended to address at least some of the abovementioned problems.
According to a first aspect of the present invention there is provided apparatus adapted to control a radiator, the apparatus including: a receiving device for receiving, in use, a radiator control signal from a remote device;* an adjusting device for adjusting a radiator, in use, in accordance with the control signal; a power supply for the apparatus, and at least one arrangement for generating power for the power supply.
In some embodiments the apparatus includes a plurality of said arrangements for generating power. A said power-generating arrangement may generate power using thermal energy emitted by the radiator. The power-generating arrangement may include a thermoelectric power arrangement. The thermoelectric power arrangement may include a Seebeck device. The thermoelectric power arrangement may be connected to a surface of the radiator.
The power-generating arrangement may include a solar power arrangement. The solar power arrangement may include at least one solar panel connected to, or fitted on, the apparatus. The solar panel may be connected to the apparatus by means of a cable or the like, allowing the panel to be located remotely from the apparatus. Additionally or alternatively, the solar panel may be fitted on the apparatus.
The adjusting device may include a motor arranged to adjust a control valve of the radiator. The motor may be arranged to move a pin or the like that at least partially opens/closes the valve.
The power supply may include a super-capacitor. The power-generating arrangement may comprise very low voltage (e.g. 0.3 -8 V) and low current (i.e. high impedance) devices. Outputs of these devices can be stepped up by a switching device. The power-generating arrangement may implement an impedance transfer technique, allowing current-limited charging of the (low impedance) super-capacitor from at least one high impedance power source.
The apparatus may further include at least one temperature sensor.
Output from the at least one temperature sensor may be used to control activation of the apparatus. The at least one temperature sensor may be used to allow thermostatic control of the radiator when the radiator is not being controlled in accordance with the control signal.
According to another aspect of the invention there is provided a radiator (or radiator valve) including apparatus substantially as described herein.
According to yet another aspect of the present invention there is provided *a system adapted to control at least one radiator, the system including: at least one radiator including, or connected to, at least one respective apparatus substantially as described herein, and a device for generating radiator control signals.
The device for generating signals may generate a radiator control signal indicating a desired temperature and/or on/off timings for the radiator. The device for generating signals may include a display for a user interface. The device for generating signals may communicate wirelessly with the apparatus.
According to another aspect of the present invention there is provided a device for generating radiator control signals substantially as described herein.
According to a further aspect of the present invention there is provided a method of controlling at least one radiator, the method including: fitting apparatus substantially as described herein to at least one radiator, and using the apparatus to control the at least one radiator.
According to a further aspect of the present invention there is provided a building or environment including a control system substantially as described herein.
Whilst the invention has been described above, it extends to any inventive combination of features set out above or in the following description.
Although illustrative embodiments of the invention are described in detail herein with reference to the accompanying drawings, it is to be understood that the invention is not limited to these precise embodiments. As such, many modifications and variations will be apparent to practitioners skilled in the art.
Furthermore, it is contemplated that a particular feature described either individually or as part of an embodiment can be combined with other individually described features, or parts of other embodiments, even if the other features and embodiments make no mention of the particular feature. Thus, the invention extends to such specific combinations not already described.
The invention may be performed in various ways, and, by way of example only, embodiments thereof will now be described, reference being made to the accompanying drawings in which: Figure 1 is a diagram of a radiator fitted with example control apparatus and a remote signal-generating device; Figure 2 is a block diagram of the example apparatus configured to control a radiator, and Figure 3 is a schematic drawing of a building fitted with an example system for controlling a plurality of radiators.
Referring to Figure 1, a radiator 100 includes a conventional thermostatic valve 104. In the example the radiator control apparatus 106 has been retro-fitted onto the UK industry standard 32 mm threaded body of the water valve of the radiator (having removed the old wax actuator). However, it will be appreciated that radiators/valves having integrated control apparatus can be manufactured, or the apparatus may be retro-fitted onto an existing radiator/valve in a different manner.
The apparatus 106 comprises a housing that includes/is connected to various components, including a device for adjusting the radiator valve and a device for receiving a radiator control signal from a remote signal-generating device 108. The apparatus includes a power supply for operating the adjusting device and further includes at least one arrangement for generating power for the power supply. The power generating arrangements advantageously scavenge/harvest energy from the environment, in particular thermal energy from the radiator itself and/or from features typically located in the vicinity of the radiator (e.g. a solar panel by a window above the radiator).
In the example of Figure 1, the power generating arrangements include a solar panel arrangement 110 and a thermoelectric arrangement 112. The solar arrangement can include a panel fitted directly on the apparatus 106.
Additionally or alternatively, at least one solar panel may be indirectly connected to the apparatus (e.g. wired) and located remotely from it, e.g. on a wall away from curtains, or a windowsill above the valve. The thermoelectric arrangement can include a Seebeck device (shown schematically at 112) attached to rear surface of the radiator and wired to the apparatus. It will be appreciated that the power-generating arrangements shown are exemplary only and alternatives are possible. For example, the apparatus may include other types of power-generating arrangements, such as kinetic power generation, e.g. vibration and water flow, or even Radio Frequency.
Figure 2 shows the components of the apparatus 106 in more detail. The outputs of the solar panel(s) 110 and Seebeck device 112 may be very low voltage (e.g. 0.3 -8 V) and low current (i.e. high impedance). When the temperature differential is small (e.g. I -5 °C), the current can be in the region of a few micro-amps and the source impedance can be in the region of hundreds of Kilo-ohms. The outputs can be stepped up by a switching device 202 (e.g. Freescale 900840 Ultra low voltage DC/DC Converter -operating voltage 0.3 -IV) to charge a super-capacitor 204 using an impedance transfer technique, allowing the current limited charging of the low impedance super-capacitor from a high impedance source. An example of a suitable super-capacitor is a CAP-X I.8F.
The super-capacitor 204, along with another switcher device, which will normally have a higher input voltage that switcher 202, is connected to a processor 208. The processor (which may be a ULP (Ultra Low Power) microcontroller, such as Texas instruments MSP43OF5xxx series) receives input from a communications device 210 that is configured to receive radiator control signals. In the example, the signal-receiving device includes a ZigBee Pro radio device, which receives signals wirelessly, although it will be appreciated that other (wired or wireless) communications means may be used. The signal can take various forms, e.g. it may include an indication that the valve is to be switched completely on/off and/or it may include an indication of the desired temperature. Using a proportional integral derivative the processor 208 calculate the appropriate position for the valve and drives a DC motor 212 to that position by turning on the switching device 206. The position of the valve can be fed back to the processor via a Hall Effect transducer 214. Stall/end of travel of the valve can be detected by measuring the motor drive circuit.
The processor 208 can also receive input from at least one temperature sensor. In the example there is a first temperature sensor 216A arranged to detect the temperature in a pipe of the radiator, and a second sensor 216B arranged to measure ambient temperature in the room. The first sensor indicating that the pipe has heated up can be used to activate the processor 208 from a sleep/power-saving mode because the heating system has been switched on. The second temperature is provided to allow the radiator valve to work as a conventional thermostatic radiator valve, e.g. in the event of failure of the apparatus/system, or for test purposes.
Figure 3 shows an example of a house 300 fitted with a system where radiators in various rooms have been fitted with control apparatus. It will be understood that the system can also be used in non-domestic premises/environments. The signal-generating device 108 can include an in-home display including a touch-screen interface and a processor/memory (or it could comprise a personal computer or the like). The display includes an interface that allows the user to configure the heating system of the entire building, which can include other controllable components (e.g. boilers, hot water tanks) in addition to the radiators fitted with the control apparatus. The interface may allow various types of configuration, for example, it may simply allow the switch on/off times/dates of all or part of the system to be specified, or it may be more complex. Having the radiators fitted with the control apparatus means that radiators throughout the building can be accurately controlled from a convenient central location. Different target temperatures and/or operational timings can be set for different radiators.
The control system may also be in communication with further devices, e.g. it may allow remote control or review of settings over the internet; it may be * connected to a weather station (e.g. one capable of measuring wind direction, wind speed, humidity, air pressure, solar gain and/or rainfall) that may be used to override or guide user settings. Other sensors may also be connected to the system, e.g. motion detectors that give an indication whether or nota room Is occupied, allowing the heating (or other systems, such as lighting) to be turned off If the room is unused for a certaIn period of time for cost-savinglsafety purposes.

Claims (29)

  1. CLAIMS1. Apparatus (106) adapted to control a radiator (100), the apparatus including: a receiving device (210) for receiving, in use, a radiator control signal from a remote device (108); an adjusting device (212) for adjusting a radiator, in use, in accordance with the control signal; a power supply (204) for the apparatus, and at least one arrangement (110, 112) for generating power for the power supply.
  2. 2. Apparatus according to claim 1, including a plurality of said arrangements (110, 112) for generating power.
  3. 3. Apparatus according to claim I or 2, wherein a said power-generating arrangement (112) generates power using thermal energy emitted, by the radiator (100).
  4. 4. Apparatus according to claim 3, wherein the power-generating arrangement (112) includes a thermoelectric power arrangement.
  5. 5. Apparatus according to claim 4, wherein the thermoelectric power arrangement (112) includes a Seebeck device.
  6. 6. Apparatus according to any one of claims 3 to 5, wherein the thermoelectric power arrangement (112) is connected to a surface of the radiator (100).
  7. 7. Apparatus according to any one of the preceding claims, wherein the power-generating arrangement include a solar power arrangement (110).
  8. 8. Apparatus according to claim 7, wherein the solar power arrangement (110) includes at least one solar panel connected to, or fitted on, the apparatus (106) adapted to control a radiator.
  9. 9. Apparatus according to claim 8, wherein the solar panel (110) is connected to the apparatus by means of a cable or the like, allowing the panel to be located remotely from the apparatus.
  10. 10. Apparatus according to claim 8 or 9, wherein the solar panel (110) is fitted directly on the apparatus (106) adapted to control the radiator.
  11. 11. Apparatus according to any one of the preceding claims, wherein the adjusting device includes a motor (212) arranged to adjust a control valve (104) of the radiator (100).
  12. 12. Apparatus according to claim 11, wherein the motor (212) is arranged to move a pin or the like that at least partially opens/closes the control valve (104).
  13. 13. Apparatus according to any one of the preceding c'aims, wherein the power supply includes a low impedance super-capacitor (204).
  14. 14. Apparatus according to claim 13, wherein the power-generating arrangement further comprises very low voltage (e.g. 0.3 -8 V) and low current (i.e. high impedance) devices.
  15. 15. Apparatus according to claim 14, wherein outputs of the very low voltage and low current devices are stepped up by a switching device (202).
  16. 16. Apparatus according to any one of claims 13 to 15, wherein the power-generating arrangement (202, 204) implements an impedance transfer technique, allowing current-limited charging of the super-capacitor from at least one high impedance power source. * 11
  17. 17. Apparatus according to any one of the preceding claims, further including at least one temperature sensor (216).
  18. 18. Apparatus according to claim 17, wherein output from the at least one temperature sensor (216) is used to control activation of the apparatus.
  19. 19. Apparatus according to claim 17 or 18, wherein the at least one temperature sensor (216) is used to allow thermostatic control of the radiator when the radiator is not being controlled in accordance with the control signal.
  20. 20. A radiator valve including apparatus according to any one of the preceding claims.
  21. 21. A radiator including apparatus according to any one of claims ito 19.
  22. 22. A system adapted to control at least one radiator, the system including: at least one radiator (100) including, or connected to, at least one respective control apparatus (106) according to any one of claims 1 to 19, and a device (108) for generating radiator control signals.
  23. 23. A system according to claim 22, wherein the device (108) for generating signals generates a radiator control signal indicating a desired temperature and/or on/off timings for the radiator.
  24. 24. A system according to claim 22 or 23, wherein the device (108) for generating signals include a display for a user interface.
  25. 25. A system according to any one of claims 22 to 24, wherein the device (108) for generating signals communicates wirelessly with the apparatus (106) adapted to control the radiator.
  26. 26. A method of controlling at least one radiator, the method including:* fitting apparatus according to any one of claims 1 to 19 to at least one radiator (100), and using the apparatus to control the at least one radiator.
  27. 27. A building including a system according to any one of claims 22 to 25.
  28. 28. Apparatus adapted to control a radiator substantially as described herein and/or with reference to the accompanying drawings.
  29. 29. A system adapted to control at least one radiator substantially as described herein and/or with reference to the accompanying drawings.
GB0912886A 2009-07-24 2009-07-24 Radiator control apparatus Withdrawn GB2472084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0912886A GB2472084A (en) 2009-07-24 2009-07-24 Radiator control apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0912886A GB2472084A (en) 2009-07-24 2009-07-24 Radiator control apparatus

Publications (2)

Publication Number Publication Date
GB0912886D0 GB0912886D0 (en) 2009-08-26
GB2472084A true GB2472084A (en) 2011-01-26

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010033428A1 (en) * 2010-08-04 2012-02-09 Micropelt Gmbh Controller for actuator, such as radiator valve of heating controller, has voltage supply with energy converter for converting ambient energy into electrical energy
DE102010050496A1 (en) * 2010-11-08 2012-05-10 Honeywell Technologies S.A.R.L. Heating thermostat valve for heater, has thermal generator that is integrated with casing, adapter and/or thermostat controller, for generating thermal energy from which electric energy for operating thermostat controller is generated
GB2501488A (en) * 2012-04-24 2013-10-30 Nigel Vaughan Smith Automatic charging device for an electronic thermostatic radiator valve
GB2507555A (en) * 2012-11-05 2014-05-07 Honeywell Technologies Sarl Valve controller in combination with an energy harvester
EP3588235A1 (en) * 2017-09-29 2020-01-01 Schneider Electric Controls UK Limited Electronic thermostatic radiator valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2800704A1 (en) * 1978-01-09 1979-07-12 Lenz Measurement and control for fluid flow valve position - is performed by logic circuit permitting energy consumption calculation
GB2051421A (en) * 1979-05-21 1981-01-14 Keldmann E C V Temperature regulating system for the control of the temperature in a room
GB2216293A (en) * 1988-03-01 1989-10-04 David Philip Reynolds Radiator valve control apparatus
GB2278934A (en) * 1993-06-09 1994-12-14 Anthony Alford Actuator control module
DE19527745A1 (en) * 1995-07-28 1997-01-30 Thiel Martin Regulating unit with attachment housing for radiator valve - contg. servo motor acting on valve plunger being applied to heater valve and attachment housing connected with operating housing by flexible connection
DE102004032618A1 (en) * 2003-07-10 2005-02-10 Kieback & Peter Gmbh & Co. Kg Solar-powered radio-transmitting temperature sensor, e.g. for use in opening or closing a heating valve, is configured so that it only transmits a change in measured temperature when the change exceeds a threshold value

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2800704A1 (en) * 1978-01-09 1979-07-12 Lenz Measurement and control for fluid flow valve position - is performed by logic circuit permitting energy consumption calculation
GB2051421A (en) * 1979-05-21 1981-01-14 Keldmann E C V Temperature regulating system for the control of the temperature in a room
GB2216293A (en) * 1988-03-01 1989-10-04 David Philip Reynolds Radiator valve control apparatus
GB2278934A (en) * 1993-06-09 1994-12-14 Anthony Alford Actuator control module
DE19527745A1 (en) * 1995-07-28 1997-01-30 Thiel Martin Regulating unit with attachment housing for radiator valve - contg. servo motor acting on valve plunger being applied to heater valve and attachment housing connected with operating housing by flexible connection
DE102004032618A1 (en) * 2003-07-10 2005-02-10 Kieback & Peter Gmbh & Co. Kg Solar-powered radio-transmitting temperature sensor, e.g. for use in opening or closing a heating valve, is configured so that it only transmits a change in measured temperature when the change exceeds a threshold value

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010033428A1 (en) * 2010-08-04 2012-02-09 Micropelt Gmbh Controller for actuator, such as radiator valve of heating controller, has voltage supply with energy converter for converting ambient energy into electrical energy
DE102010033428A8 (en) * 2010-08-04 2012-05-10 Micropelt Gmbh Control for an actuator
DE102010033428B4 (en) 2010-08-04 2024-04-18 Micropelt Gmbh Radiator valve with control for one actuator and heating control
DE102010050496A1 (en) * 2010-11-08 2012-05-10 Honeywell Technologies S.A.R.L. Heating thermostat valve for heater, has thermal generator that is integrated with casing, adapter and/or thermostat controller, for generating thermal energy from which electric energy for operating thermostat controller is generated
DE102010050496B4 (en) * 2010-11-08 2018-07-05 Honeywell Technologies S.A.R.L. Heating thermostatic valve
GB2501488A (en) * 2012-04-24 2013-10-30 Nigel Vaughan Smith Automatic charging device for an electronic thermostatic radiator valve
GB2507555A (en) * 2012-11-05 2014-05-07 Honeywell Technologies Sarl Valve controller in combination with an energy harvester
GB2507555B (en) * 2012-11-05 2017-05-10 Honeywell Technologies Sarl A valve controller in combination with an energy harvester
EP3588235A1 (en) * 2017-09-29 2020-01-01 Schneider Electric Controls UK Limited Electronic thermostatic radiator valve

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