EP3470745A1 - Heizungssteuerungssystem mit hydraulischem ausgleich - Google Patents

Heizungssteuerungssystem mit hydraulischem ausgleich Download PDF

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Publication number
EP3470745A1
EP3470745A1 EP17195934.9A EP17195934A EP3470745A1 EP 3470745 A1 EP3470745 A1 EP 3470745A1 EP 17195934 A EP17195934 A EP 17195934A EP 3470745 A1 EP3470745 A1 EP 3470745A1
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EP
European Patent Office
Prior art keywords
room
valve
boiler
temperature
controller
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Granted
Application number
EP17195934.9A
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English (en)
French (fr)
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EP3470745B1 (de
Inventor
Jifuh Sheen
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Individual
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Individual
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    • 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
    • F24D19/1018—Radiator valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/254—Room temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/281—Input from user
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/45—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible
    • F24H15/464—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible using local wireless communication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency

Definitions

  • the invention relates to a heating system to warm rooms, and in particular, to a heating system with intelligence to save energy and balancing heat distribution among the multiple rooms.
  • a heating system to warm multiple rooms includes a boiler to provide hot water to the multiple rooms through water pipes.
  • a boiler to provide hot water to the multiple rooms through water pipes.
  • valves to control the flow of the hot water.
  • a valve can be located in a room for providing hot water to a radiator for radiating heat to the rooms or multiple valves can be located inside a central manifold for providing multiple under floor pipes to warm rooms.
  • each valve is either fully closed or fully opened, which is not efficient for distributing heat among rooms if each room has a different set temperature and might waste heat energy when the heat provided by the boiler is higher than necessary to maintain the set temperatures of the rooms.
  • One objective of the present invention is to provide a heating system with intelligence to balance heat among multiple rooms in such it avoids big fluctuation of water flow of each valve during the heating adjustment process.
  • One objective of the present invention is to provide a heating system with intelligence to balance heat among multiple rooms when the output heat of the boiler is not enough to allow each room to reach its set temperature.
  • One objective of the present invention is to provide a heating system with intelligence to adjust the output heat of the boiler to save energy.
  • a system for distributing heat to multiple rooms from a boiler comprising a corresponding adjustable valve, a corresponding valve controller and a corresponding thermostat for controlling the temperature of each room, wherein the opening gap of adjustable valve is capable of varying from the minimum opening gap when the adjustable valve is fully closed to the maximum opening gap when the adjustable valve is fully opened with a plurality of different opening gaps between said minimum opening gap and said maximum opening gap, wherein the opening gap of each adjustable valve is capable of being adjusted by its corresponding valve controller according to information comprising a temperature of each room detected by its corresponding thermostat and a set temperature of each room set by a user for distributing heat from the boiler to each room via its corresponding adjustable valve.
  • said information further comprises the current opening gap of each adjustable valve for adjusting the output heat of the boiler to save energy.
  • each of a first room and a second room is warmed through a pipe located under the floor of the room, respectively, wherein a thermostat corresponding to the first room is located in the first room and a thermostat corresponding to the second room is located in the second room, and wherein a first valve and a first valve controller corresponding to the first room and a second valve and a second valve controller corresponding to the second room are located in a manifold outside the first room and the second room.
  • a third room is warmed through a radiator, wherein a third valve, a third valve controller and a third thermostat are located inside the third room.
  • a system for distributing heat to multiple rooms from a boiler comprising a corresponding valve, a corresponding valve controller and a corresponding thermostat for controlling the temperature of each room, wherein the opening gap of each adjustable valve is capable of varying from the minimum opening gap when the adjustable valve is fully closed to the maximum opening gap when the adjustable valve is fully opened with a plurality of different opening gaps between said minimum opening gap and said maximum opening gap, wherein said valves and said valve controllers are located in a manifold outside of each of the multiple rooms for distributing heat from the boiler to each room.
  • a system for distributing heat output from a boiler to multiple rooms wherein the system comprises a corresponding valve, a corresponding valve controller and a corresponding thermostat for controlling the temperature of each room, wherein the opening gap of each adjustable valve is capable of varying from the minimum opening gap when the adjustable valve is fully closed to the maximum opening gap when the adjustable valve is fully opened with a plurality of different opening gaps between said minimum opening gap and said maximum opening gap, wherein the output heat from the boiler is controlled according to information comprising a difference between the current temperature of each room detected by its corresponding thermostat and a set temperature of each room set by a user and the current opening gap of each valve.
  • a boiler system for outputting heat to multiple rooms wherein a corresponding adjustable valve, a corresponding valve controller and a corresponding thermostat are used for controlling the temperature of each room, wherein the boiler system comprises a boiler and a boiler manager connected to the boiler, wherein the boiler manager instructs the boiler to adjust heat output according to information comprising a temperature of each room detected by its corresponding thermostat, a set temperature of each room set by a user, and the current opening gap of each adjustable valve.
  • first and second features are formed in direct contact
  • additional features are formed between the first and second features, such that the first and second features are not in direct contact
  • present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
  • Heating control system with hydraulic balancing is based on the following design architecture: (A) All devices in the heating system of present invention can have wireless communication capability. Any device can communicate to any other devices by wireless communication; (B) valve controller has a built in electric-mechanism module which partitions the valve open gap, from fully open to fully closed, into hundreds of step so that valve controller can control valve to open its gap at any step among these partitioned steps; (C) both of thermostat and valve controller could be combined into different type of products to meet different working environment. But, they all have the same working characteristics: thermostat continuously measures room temperatures and compare with set temperature to determine how much valve gap should be open and commands valve controller to set valve to open gap to the calculated step. The process is ongoing and dynamically adjust valve gap.
  • FIG. 1 is a schematic view of a heating system 100 in accordance with an embodiment of the present invention.
  • the boiler 101 will supply hot water to a first radiator (not shown) via the adjustable valve 1 102b, and the water volume flowing through the first radiator can be controlled by using the valve 1 controller 102a to adjust the opening gap of the adjustable valve 1 102b.
  • Thermostat 1 102 is a wireless device which communicates with valve 1 controller 102a via a wireless connection to control the opening gap of an adjustable valve 1 102b in order to meet a desired room temperature set by user.
  • the boiler 101 will also supply hot water to a second radiator (not shown) via an adjustable valve 103b, and the water volume flowing through the second radiator can be controlled by using the valve 2 controller 103a to adjust the opening gap of the adjustable valve 2 103b, wherein the valve 2 controller 103a is integrated with the thermostat 2 103 as a single device.
  • This single device will measure room temperature and compare with the set temperature set by user and then adjust the opening gap of the adjustable valve 2 103b as desired.
  • the boiler 101 will also supply hot water flowing to a manifold that provides water loops to under floor pipes for warming rooms.
  • Thermostat 3 104, thermostat 4 105, thermostat 5 106 are wireless devices which communicate with a Multi-Valves Controller 110 which is connected to valve controller 3 104a, valve controller 4 105a and valve controller 5 106a, wherein thermostat 3 104, thermostat 4 105, thermostat 5 106 are paired with valve controller 3 104a, valve controller 4 105a, valve controller 5 106a, respectively.
  • the Multi-Valves Controller 110, valve controller 3 104a, valve controller 4 105a, valve controller 5 106a and adjustable valves 104b, 105b, 106b are located inside a manifold, wherein Multi-Valves Controller 110 receives commands from the thermostat 3 104, thermostat 4 105, thermostat 5 106 to control valve controller 3 104a, valve controller 4 105a and valve controller 5 106a respectively to adjust the opening gap of the adjustable valves 104b, 105b, 106b.
  • each of the above valve controllers can be an intelligent valve controller such as valve controller 102b, one of the implementations of the intelligent valve controller is shown in FIG.
  • valve 2 controller 103a is integrated with the thermostat 2 103 as a single device, which is called a thermoactuator, one of the implementations of the thermoactuator is shown in FIG. 3C .
  • a boiler manager 101a is connected with the boiler 101 via an interface such as a RS232 interface.
  • the boiler manager communicates with other devices in the heating system via wireless connections. For example, the boiler manager from obtained room temperatures, set temperatures and opening gaps of the adjustable valves from thermostats and can instruct the boiler to adjust the heat output. When all rooms can reach set temperature of the steady state, but none of the adjustable valves is fully opened, it means that the heat output of the boiler is too large, a waste of energy. At this time, boiler manager can instruct boiler to reduce its heat output to save energy. When there is a room which has valve full open but could not reach its set temperature while other rooms have reached set temperature of the steady state, it means heat output from boiler is not enough. Under such case, boiler manager will inform boiler to increase heat output.
  • each room divides from its room temperature to target set temperature into many sections.
  • Each section has its target set temperature and a target pre-defined room temperature changing rule.
  • valve is adjusted every fixed pre-defined time interval to have room temperature change per pre-defined time interval conform to the target pre-defined room temperature changing value per pre-defined time interval according to the pre-defined time interval rule so that each room in the section will enable room temperature gradually changing to reach section target set temperature.
  • room reaches set temperature and valves gap are also at stable.
  • this room could partition set temperature adjustment process into 3 sections: 16°C -19°C, 19°C-21°C, and 21°C -22°C, wherein in section 16°C -19°C, the temperature will be increased from 16°C to target section set temperature 19°C, then enter section 19°C-21°C to increase the temperature to target section set temperature 21°C. Finally, enter section 21°C -22°C to increase the temperature to the set temperature 22°C.
  • valve movement is controlled and guided by a pre-defined temperature changing rule: increase or decrease valve gap by certain amount of adjustable valve gap steps depending on the difference of measured room temperature change per pre-defined time compared to the pre-defined room temperature change per pre-defined time interval.
  • rule could be : pre-defined time interval is 5 minutes , targeted room temperature change per 5 minutes is to be within [0.3, 0.4] degree, if measured room temperature change per 5 minutes is less than 0.3 degree and no less than 0, valve gap will be increased by 1% of total valve gap ; if measured room temperature change per 5 minutes is less than 0, valve gap will be increase by 3 % of total valve gap; If measured room temperature change larger than 0.4 degree and no larger than 0.7 degree, valve gap will be reduced by 1% of total valve gap; if measured room temperature change larger than 0.7 degree, valve gap will be reduced by 3% of total valve gap.
  • the temperature difference between the current room temperature when user sets set temperature and the set temperature could be divided into multiple sections, wherein the multiple rooms respectively adjust its current room temperature toward a corresponding targeted set temperature of the section and guided by said pre-defined room temperature changing rule of the section.
  • the multiple rooms respectively adjust its current room temperature toward a corresponding targeted set temperature of the section and guided by said pre-defined room temperature changing rule of the section.
  • one of the guidelines is to select the pre-defined room temperature change per pre-defined time interval by considering how much time it needs to travel through the section and to adjust the valve gap in a way that ongoing room temperature change per pre-defined time interval will converge to the pre-defined room temperature change per pre-defined time interval of the section, and another guideline is that the section closer to last section which has user set temperature as section targeted temperature, the pre-defined room temperature change per pre-defined time interval for the section will be smaller and associated valves gap amount adjustment will be more fine adjustment.
  • valve control steps, pre-defined time interval, pre-defined temperature changing range per time interval can be also further changed at each time interval checking point within the section.
  • the number of sections for each room between the current room temperature and the set temperature and parameter of valve adjust steps, pre-defined time interval, temperature changing range per pre-defined time interval of each section can be defined based on the requirements in each different scenario or at user's needs.
  • the operations of the heat system is described as follows:
  • FIG. 2 is a schematic view of a heating system 200 in accordance with an embodiment of the present invention.
  • the heating system 200 distributes heat to three rooms 201, 202, 203 from a boiler 204 that provides hot water to warm each room.
  • Room 1 has a radiator with control device Dev 1 201a.
  • Room 2 202 and room 3 203 are using under floor heating with hot water coming from a manifold 205, while thermostat 2 202a and thermostat 3 203a are at room 2 202 and room 3 203 respectively.
  • Dev 1 201a is at room 1 which detects room temperature and adjusts water volume flow through the radiator by control the open size of its corresponding adjustable valve.
  • Thermostat 2 202a is at room 2 202 which detects room temperature and commands Multi-Valves Controller 205a at the manifold controls the dumb valve controllers 205b and 205c to adjust the opening gap of its corresponding adjustable valve for determining the water volume following to room 2 202 and room 3 203.
  • Dev 4 204a is a boiler manager which is connected to the boiler, wherein the boiler manager controls the boiler to generate right amount of heat output.
  • the room having the highest room temperature can transfer certain amount of heat to the room with the lowest room temperature that has not yet met its set temperature, wherein the room has the highest room temperature is a heat contributor and the room with the lowest room temperature as a heat recipient.
  • the heat contributor can lower its set temperature for transferring certain amount of heat to the heat recipient.
  • the contributor will reduce the opening gap of the corresponding adjustable valve while the heat recipient will have its adjustable valve fully opened, wherein all other rooms are stable at their current room temperature.
  • the above heat transfer process from the room with the highest room temperature to the room with the lowest room temperature can be iterated to ensure there is no room with an un-acceptable low room temperature. Please note that there can be multiple contributors and/or multiple recipients during a heat transfer process among rooms.
  • the system can calculate optimum temperatures for all of the rooms and each room can set its set temperature to the calculated optimum temperature to balance heat among rooms and repeat the process.
  • FIG. 3A is a schematic view of valve controller 300 to position a corresponding adjustable valve to control the water volume flowing through a suitable opening gap of the adjustable valve in accordance with an embodiment of the present invention.
  • the main blocks of valve controller are: Electronic control center, communication block, motor driver, gear sets, infra-red transceiver, interface to move valve.
  • Working principle of each element of the valve controller is described as follows: Motor driver: control motor speed, clock or clockwise rotation. When motor works, it will push gear sets to rotate and move its pod forward or backward. This pod connects to interface to move valve. Interface to move valve will transform up down movement of the pod into a larger torque pod to on-off push-pull valve or into a larger torque rotation cap to open-close ball valve.
  • infra-red transceiver When motor starts to work, infra-red transceiver will transmit infra-red. When gear sets move to an infra-red reflection dot on the gear, the reflection of the infra-red will be received by the infra-red transceiver. When infra-red transceiver receives reflected infra-red, it knows the gear sets has rotated to another reflection position. By recording the number of the infra-red reflections, it can calculate how much the gear sets have been moved and convert them into a distance the gear sets pod has moved, which can be used to determine the opening gap of the adjustable valve. When the desired opening gap of the adjustable valve is reached, the motor will be stopped. Another possible implementation is to use a stepping motor to measure how many steps between full open and full close of the adjustable valve, and then the stepping motor can be controlled to the opening gap of the adjustable valve.
  • the Intelligent valve controller and its corresponding thermostat can communicate with each other through wireless communications, the thermostat is responsible to send a command to the intelligent valve controller to adjust the adjustable valve to a desired opening gap, and the intelligent valve controller will adjust the adjustable valve to the desired opening gap according to the command.
  • the FIG. 3A is a design based on a microcontroller, however, the present invention is not limited to the implementations of the intelligent valve controller 300.
  • intelligent valve controller 300 can be based on a hardware design as well.
  • FIG. 3B is a schematic view of a dumb valve controller 400 to position a corresponding adjustable valve in a manifold in accordance with an embodiment of the present invention.
  • the dumb valve controllers in the manifold can be connected to a Multi-Valves Controller using RJ11 connector, wherein the Multi-Valves Controller has multiple RJ11 female sockets, and each dumb valve controller also has female a socket, wherein both ends of the RJ11 cable are equipped with male plugs to connect the Multi-Valves Controller and to the dumb valve controller.
  • the Multi-Valves Controller can communicate with each of the thermostats corresponding to the manifold for receiving a command from each of the thermostats and control corresponding dumb valve controller to adjust the corresponding adjustable valve to the desired opening gap, respectively.
  • the Multi-Valves Controller After the Multi-Valves Controller receives the command from a thermostat, the Multi-Valves Controller will control the corresponding dumb valve controller to adjust a corresponding adjustable valve to the desired opening gap.
  • RJ11 connector instead of RJ11 connector can be used in the example, however, the RJ11 connector makes the installing process easier.
  • FIG. 3C is a schematic view of a thermoactuator 500 comprising a thermostat and a valve controller and having wireless communication capability in accordance with an embodiment of the present invention.
  • Thermoactuator 500 can measure/record room temperatures, compare with set up temperature, and analyze the room temperature changing curve, also collect other similar information from other thermoactuators in the system. Thermoactuator 500 will decide when and how much to change valve gap open size according its computation. When room temperature is lower than set temperature, thermoactuator 500 will increase the opening gap of the adjustable valve. When the room temperature is higher set temperature, thermoactuator 500 will reduce the opening gap of the adjustable valve.
  • FIG. 3C is a design based on a microcontroller, however, the present invention is not limited to the implementations of the thermoactuator 500. For example, the thermoactuator 500 can be based on a hardware design as well.
  • FIG. 4 is a schematic view 600 of using a Multi-Valves Controller 603 in a manifold to control each dumb valve controller 604, 605 in accordance with an embodiment of the present invention.
  • Each thermostat 610, 602 can command its associated dumb valve controller 604, 605 through the Multi-Valves Controller 603.
  • Each thermostat 610, 602 computes the needed opening gap of its corresponding adjustable valve and sends the request to the Multi-Valves Controller 603.
  • the Multi-Valves Controller 603 will control each dumb valve controller 604, 605 to adjust the opening gap of each adjustable valve, respectively.
  • FIG. 4 is a design based on a microcontroller, however, the present invention is not limited to the implementations of the Multi-Valves Controller 603.
  • the Multi-Valves Controller 603 can be based on a hardware design as well.
  • FIG. 5 is a schematic view of a boiler system 700 including a boiler 101 comprising an interface to connect with an associated boiler manager 101a for controlling the heat output of the boiler 101 in accordance with an embodiment of the present invention.
  • a boiler manager 101a is directly connected with the boiler 101 via a RS232 interface, but the present invention is not limited to the type of interface to connect the boiler manager 101a to the boiler 101.
  • the boiler manager comprises a communication interface such as a wireless interface to communicate with other devices in the heating system via wireless connections.
  • the boiler manager 101a can obtain room temperatures, set temperatures and opening gaps of the adjustable valves from thermostats so that it can instruct the boiler to decrease or increase heat output accordingly.
  • the boiler manager 101a instructs boiler 101 to reduce its heat output to save energy.
  • the boiler manager 101a can instruct boiler 101 to increase its heat output.
  • the boiler manager 101a is a design based on a microcontroller or a processor, however, the present invention is not limited to the implementations of the boiler manager 101a.
  • the boiler manager 101a can be based on a hardware design as well.
  • the boiler system 700 and boiler manager 101a can be used for warming one room only, and the boiler manager 101a can obtain the room temperature set temperature and the opening gap of the adjustable valves from the thermostat so that it can instruct the boiler 101 to adjust the heat output accordingly.
  • the boiler manager 101a instructs boiler 101 to reduce its heat output to save energy.
  • the room could not reach its set temperature of the steady state, but the adjustable valves are fully opened, it means that the heat output of the boiler is not enough.
  • Boiler manager 101a can instruct boiler 101 to increase its heat output.
EP17195934.9A 2017-10-11 2017-10-11 Heizungssteuerungssystem mit hydraulischem ausgleich Active EP3470745B1 (de)

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EP3470745B1 EP3470745B1 (de) 2024-05-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4230921A1 (de) * 2022-02-17 2023-08-23 Viessmann Climate Solutions SE Verfahren zum steuern einer raumtemperatur, heizungssystem zum steuern einer raumtemperatur und steuervorrichtung zum einsatz in einem heizungssystem
WO2023233388A1 (en) * 2022-06-03 2023-12-07 Kellett Leroy Michael Improvements to heating systems

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4203613A1 (de) * 1992-02-07 1993-08-12 Sandler Energietechnik Steuersystem fuer raumheizanlagen
EP2530390A1 (de) * 2011-06-01 2012-12-05 Danfoss A/S Heizsystem und Verfahren zum Heizen einer Vielzahl von Räumen
US20130221117A1 (en) * 2010-11-19 2013-08-29 Nest Labs, Inc. Power management in single circuit hvac systems and in multiple circuit hvac systems

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100924147B1 (ko) * 2007-12-04 2009-10-28 주식회사 경동네트웍 난방시스템 제어방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4203613A1 (de) * 1992-02-07 1993-08-12 Sandler Energietechnik Steuersystem fuer raumheizanlagen
US20130221117A1 (en) * 2010-11-19 2013-08-29 Nest Labs, Inc. Power management in single circuit hvac systems and in multiple circuit hvac systems
EP2530390A1 (de) * 2011-06-01 2012-12-05 Danfoss A/S Heizsystem und Verfahren zum Heizen einer Vielzahl von Räumen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4230921A1 (de) * 2022-02-17 2023-08-23 Viessmann Climate Solutions SE Verfahren zum steuern einer raumtemperatur, heizungssystem zum steuern einer raumtemperatur und steuervorrichtung zum einsatz in einem heizungssystem
WO2023233388A1 (en) * 2022-06-03 2023-12-07 Kellett Leroy Michael Improvements to heating systems

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