EP3608603B1 - Système de circulation de milieu chauffant - Google Patents

Système de circulation de milieu chauffant Download PDF

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Publication number
EP3608603B1
EP3608603B1 EP17904897.0A EP17904897A EP3608603B1 EP 3608603 B1 EP3608603 B1 EP 3608603B1 EP 17904897 A EP17904897 A EP 17904897A EP 3608603 B1 EP3608603 B1 EP 3608603B1
Authority
EP
European Patent Office
Prior art keywords
heating
indoor
temperature
heating medium
defrosting
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.)
Not-in-force
Application number
EP17904897.0A
Other languages
German (de)
English (en)
Other versions
EP3608603A1 (fr
EP3608603A4 (fr
Inventor
Naoki Watanabe
Naoki SHIBAZAKI
Yasunari Matsumura
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
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Publication of EP3608603A1 publication Critical patent/EP3608603A1/fr
Publication of EP3608603A4 publication Critical patent/EP3608603A4/fr
Application granted granted Critical
Publication of EP3608603B1 publication Critical patent/EP3608603B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
    • 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
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • 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
    • F24D19/0095—Devices for preventing damage by freezing
    • 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
    • F24H15/136—Defrosting or de-icing; Preventing freezing
    • 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
    • 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
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors of heat pumps
    • 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
    • F24H15/395—Information to users, e.g. alarms
    • 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
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/004—Control mechanisms
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps
    • 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
    • F24H15/176—Improving or maintaining comfort of users
    • 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
    • F24H15/258—Outdoor temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/23—Time delays

Definitions

  • the present invention relates to a heating medium circulation system.
  • the heat pump includes an air heat exchanger that exchanges heat between a refrigerant and air and a compressor that compresses the refrigerant.
  • frost may adhere to the air heat exchanger. In this case, there is a need to temporarily suspend the indoor-heating operation and perform defrosting operation for removing the frost.
  • a system disclosed in PTL 1 described below is as follows.
  • an upper limit of the temperature of warm water supplied to the floor indoor-heating device is set to 55°C, 50°C, 45°C, and the like.
  • the period of time at the upper limit 55°C is set to five minutes and the period of time at the upper limit 50°C is set to five minutes.
  • the present invention has been made in order to solve the problems as above, and has an object to provide a heating medium circulation system capable of reducing the frequency of activating and deactivating a compressor included in heating means for heating a heating medium.
  • a heating medium circulation system includes: a heating means for heating a liquid heating medium, the heating means including an air heat exchanger configured to exchange heat between a refrigerant and air and a compressor configured to compress the refrigerant; a pump configured to circulate the heating medium through a circulation circuit passing through an indoor-heating terminal and the heating means; a control means electrically connected to the heating means and the pump, the control means being configured to execute indoor-heating operation for suppling the heating medium heated by the heating means to the indoor-heating terminal and defrosting operation for causing frost adhering to the air heat exchanger to melt; and a means for detecting a supply temperature that is a temperature of the heating medium supplied to the indoor-heating terminal from the heating means.
  • the control means is configured to deactivate the compressor when the supply temperature exceeds a first deactivation temperature in the indoor-heating operation after a predetermined period of time elapses from a switching time point from the defrosting operation to the indoor-heating operation.
  • the control means is configured not to deactivate the compressor when the supply temperature exceeds the first deactivation temperature in the indoor-heating operation in a post-defrosting period that is a period until the predetermined period of time elapses from the switching time point.
  • the frequency of activating and deactivating the compressor included in the heating means for heating the heating medium can be reduced.
  • Fig. 1 is a view illustrating a heating medium circulation system 1 according to Embodiment 1.
  • the heating medium circulation system 1 includes a heat pump device 100, a tank unit 200, and a controller 10.
  • the heating medium circulation system 1 corresponds to a heat-pump-type hot-water supply indoor-heating system.
  • the heat pump device 100 and the tank unit 200 are connected to each other via a first passage 3, a second passage 9, and electric wiring (not shown).
  • the heat pump device 100 is installed outdoors.
  • the tank unit 200 may be installed outdoors or may be installed indoors.
  • the heating medium circulation system 1 of Embodiment 1 has a configuration in which the heat pump device 100 and the tank unit 200 are separated from each other.
  • the present invention is not limited to the configuration as above, and the heat pump device 100 and the tank unit 200 may be integrated.
  • the heat pump device 100 of Embodiment 1 is an example of heating means for heating a liquid heating medium.
  • the heating medium may be liquid water or may be a liquid heating medium other than water such as any of a calcium chloride solution, an ethylene glycol solution, a propylene glycol solution, and alcohol, for example.
  • the heat pump device 100 includes a refrigerant circuit including a compressor 13 that compresses the refrigerant, a heat exchanger 15, a decompression device 16 that decompresses the refrigerant, an air heat exchanger 17, and a refrigerant pipe 14 that annularly connects those devices.
  • the heat pump device 100 performs an operation of a heat pump cycle, that is, a refrigerating cycle in the refrigerant circuit.
  • the refrigerant sealed in the refrigerant circuit may be any of carbon dioxide, ammonia, propane, isobutane, fluorocarbons such as HFC, HFO-1123, and HFO-1234yf, for example.
  • the heat exchanger 15 exchanges heat between a high-pressure and high-temperature refrigerant compressed by the compressor 13 and the heating medium.
  • the decompression device 16 decompresses and expands the high-pressure refrigerant that has passed through the heat exchanger 15.
  • the decompression device 16 may be an expansion valve capable of electrically controlling the opening degree.
  • the refrigerant that has passed through the decompression device 16 flows into the air heat exchanger 17.
  • the air heat exchanger 17 exchanges heat between outdoor air and the refrigerant.
  • the heat pump device 100 may include a blower (not shown) that transmits outside air to the air heat exchanger 17.
  • the tank unit 200 includes a heat storage tank 2, a switching valve 6, and a circulation pump 11.
  • the heating medium is stored in the heat storage tank 2.
  • a thermal stratification in which the temperature on the upper side is high and the temperature on the lower side is low is formed due to the difference in specific gravity of the heating medium in accordance with the temperature.
  • a lower portion inlet passage 18 is connected to the lower portion of the heat storage tank 2.
  • the heating medium having a relatively low temperature flows into the heat storage tank 2 through the lower portion inlet passage 18.
  • An upper portion outlet passage 19 is connected to the upper portion of the heat storage tank 2.
  • the heating medium accumulated in the heat storage tank 2 is supplied to a heat demand portion (not shown) through the upper portion outlet passage 19.
  • the heat demand portion may be a heat exchanger for suppling hot water that heats water by exchanging heat between the heating medium and the water.
  • a circulation circuit in which the heating medium that has passed through the heat demand portion returns to the lower portion of the heat storage tank 2 through the lower portion inlet passage 18 may be formed.
  • the hot water may be directly supplied to heat demand portions such as a hot water supply faucet, a bathtub, and a shower from the heat storage tank 2 through the upper portion outlet passage 19.
  • the heat storage tank 2 has an outlet 25 and an inlet 26.
  • the heating medium in the heat storage tank 2 flows out from the outlet 25.
  • the heating medium heated by the heat pump device 100 enters the heat storage tank 2 from the inlet 26.
  • the outlet 25 is at the lower portion of the heat storage tank 2.
  • the inlet 26 is at the upper portion of the heat storage tank 2.
  • the switching valve 6 includes a first port 6a, a second port 6b, and a third port 6c. The switching valve 6 can be switched between a state in which the third port 6c and the first port 6a are in communication with each other and the second port 6b is blocked and a state in which the third port 6c and the second port 6b are in communication with each other and the first port 6a is blocked.
  • the lower portion outlet passage 8 connects the outlet 25 of the heat storage tank 2 and an upstream end of the second passage 9 to each other.
  • a downstream end of the second passage 9 is connected to a heating medium inlet of the heat exchanger 15 of the heat pump device 100.
  • the circulation pump 11 is connected to a place in the middle of the second passage 9.
  • the operation speed of the circulation pump 11 can be changed.
  • the circulation pump 11 may include a pulse width modulation control DC motor that can change the operation speed in accordance with a speed command voltage from the controller 10.
  • the circulation pump 11 is installed in the tank unit 200. In place of the configuration, the circulation pump 11 may be installed in the heat pump device 100.
  • the first passage 3 connects the heating medium outlet of the heat exchanger 15 of the heat pump device 100 and the third port 6c of the switching valve 6 to each other.
  • the upper portion inlet passage 4 connects the first port 6a of the switching valve 6 and the inlet 26 of the heat storage tank 2 to each other.
  • the circulation pump 11 is connected to a place in the middle of the second passage 9. In place of the configuration, the circulation pump 11 may be connected to a place in the middle of the first passage 3.
  • An indoor-heating terminal 12 includes at least one indoor-heating unit 24.
  • the indoor-heating unit 24 heats the inside of a room by dissipating the heat of the heating medium.
  • the indoor-heating unit 24 at least one type out of a floor indoor-heating panel provided under the floor, a radiator or a panel heater provided on an indoor wall surface, and a fan convector, for example, can be used.
  • the indoor-heating terminal 12 includes a plurality of the indoor-heating units 24, the types of the indoor-heating units 24 may be the same or different.
  • the way of connecting the plurality of indoor-heating units 24 may be any of connection in series, parallel connection, and a combination of the connection in series and the parallel connection.
  • the tank unit 200 and the indoor-heating terminal 12 are connected to each other via an external passage 22 and an external passage 23.
  • the tank unit 200 has an outlet 27 and an inlet 28.
  • the heating medium supplied to the indoor-heating terminal 12 from the tank unit 200 flows out to the outside of the tank unit 200 from the outlet 27.
  • a third passage 5 connects the second port 6b of the switching valve 6 and the outlet 27 to each other in the tank unit 200.
  • An upstream end of the external passage 22 is connected to the outlet 27 from the outside of the tank unit 200.
  • a downstream end of the external passage 22 is connected to an inlet of the indoor-heating terminal 12.
  • An upstream end of the external passage 23 is connected to an outlet of the indoor-heating terminal 12.
  • a downstream end of the external passage 23 is connected to the inlet 28 from the outside of the tank unit 200.
  • a fourth passage 7 connects the inlet 28 and an upstream end of the second passage 9 to each other in the tank unit 200.
  • the heating medium returning to the tank unit 200 from the indoor-heating terminal 12 enters the tank unit 200 from the inlet 28.
  • the controller 10 is installed in the tank unit 200.
  • the controller 10 and a terminal device 21 are connected to each other so as to be able to transmit data to each other in a wired or wireless manner.
  • the terminal device 21 may be installed in a room including the indoor-heating unit 24.
  • the terminal device 21 has a function of receiving an operation motion command, the change of the setting value, and operations by a user relating to other matters.
  • the terminal device 21 is an example of an operation display terminal or a user interface.
  • the terminal device 21 may include a display that displays information on the state of the heating medium circulation system 1 and the like, operation portions such as buttons or keys operated by the user, a speaker, a microphone, and the like.
  • the heating medium circulation system 1 may include a plurality of the terminal devices 21 installed in different places.
  • the above-mentioned display may be any of a liquid crystal display, an organic electro-luminescence (EL) display, and a touchscreen also having a function of an operation portion.
  • the terminal device 21 may output a speech guidance from the speaker.
  • the terminal device 21 functions as notification means for the user by performing at least one of the display by the display and the speech guidance from the speaker.
  • a plurality of temperature sensors may be attached to the surface of the heat storage tank 2 so as to be separated from each other in the vertical direction.
  • the controller 10 can calculate the heat storage amount in the heat storage tank 2 by detecting the temperature distribution in the heat storage tank 2 in the vertical direction by those temperature sensors.
  • a flow rate sensor 30 and a supply temperature sensor 31 are installed in the middle of the first passage 3.
  • the flow rate sensor 30 detects the volumetric flow rate of the heating medium passing through the first passage 3.
  • the temperature of the heating medium flowing out from the heat pump device 100 is referred to as a "supply temperature”.
  • the "supply temperature" at the time of the indoor-heating operation corresponds to the temperature of the heating medium supplied to the indoor-heating terminal 12 from the heat pump device 100.
  • the supply temperature can be detected by the supply temperature sensor 31.
  • the flow rate sensor 30 and the supply temperature sensor 31 are installed in the tank unit 200. In place of the configuration, the flow rate sensor 30 and the supply temperature sensor 31 may be installed in the heat pump device 100.
  • a return temperature sensor 32 is provided in the second passage 9.
  • the return temperature sensor 32 detects the temperature of the heating medium flowing into the heat pump device 100.
  • the temperature of the heating medium flowing into the heat pump device 100 is hereinafter also referred to as a "return temperature".
  • the return temperature sensor 32 is installed in the tank unit 200. In place of the configuration, the return temperature sensor 32 may be installed in the heat pump device 100.
  • the heating power of the heat pump device 100 may be variable.
  • the heating power means a heat quantity given to the heating medium from the heat pump device 100 per unit time.
  • the unit of the heating power is "watt", for example.
  • the controller 10 may control the heating power by changing the capacity of the compressor 13, for example.
  • the controller 10 may control the capacity of the compressor 13 by changing the rotational speed of the compressor 13, for example.
  • the controller 10 may change the rotational speed of the compressor 13 by inverter control, for example.
  • the heat accumulating operation is performed as follows.
  • the switching valve 6 is placed in a state in which the third port 6c communicates with the first port 6a and the second port 6b is blocked.
  • the heat pump device 100 and the circulation pump 11 are operated.
  • a low-temperature heating medium in the lower portion of the heat storage tank 2 is transmitted to the heat exchanger 15 through the outlet 25, the lower portion outlet passage 8, and the second passage 9.
  • the high-temperature heating medium heated by the heat exchanger 15 flows into the upper portion of the heat storage tank 2 through the first passage 3, the third port 6c and the first port 6a of the switching valve 6, the upper portion inlet passage 4, and the inlet 26.
  • the high-temperature heating medium is accumulated from the top to the bottom in the heat storage tank 2 by the circulation of the heating medium as described above. As a result, the heat storage amount of the heat storage tank 2 increases.
  • the circulation circuit of the heating medium at the time of the heat accumulating operation described above is referred to as a "heat accumulating circuit".
  • the controller 10 may start the heat accumulating operation when the heat storage amount in the heat storage tank 2 becomes equal to or less than a preset low level. When the heat storage amount in the heat storage tank 2 increases by the heat accumulating operation and reaches a preset high level, the controller 10 may end the heat accumulating operation. Note that the present invention can be applied to a system that does not include the heat storage tank 2 as described above, that is, a system that does not perform the heat accumulating operation.
  • Fig. 2 is a view illustrating circulation circuits of the refrigerant and the heating medium at the time of the indoor-heating operation of the heating medium circulation system 1 of Embodiment 1.
  • the arrows in Fig. 2 indicate the directions in which the refrigerant and the heating medium flow.
  • the indoor-heating operation is as follows.
  • the switching valve 6 is placed in a state in which the third port 6c communicates with the second port 6b and the first port 6a is blocked.
  • the heat pump device 100 and the circulation pump 11 are operated.
  • the heating medium heated by the heat exchanger 15 of the heat pump device 100 is delivered to the indoor-heating terminal 12 through the first passage 3, the third port 6c and the second port 6b of the switching valve 6, the third passage 5, the outlet 27, and the external passage 22.
  • the temperature of the heating medium decreases when heat is removed from the heating medium by the indoor air or the floor as the heating medium passes through the indoor-heating unit 24 of the indoor-heating terminal 12.
  • the heating medium of which temperature has decreased returns to the heat exchanger 15 of the heat pump device 100 through the external passage 23, the inlet 28, the fourth passage 7, and the second passage 9.
  • the heating medium that has returned to the heat exchanger 15 is reheated and recirculated.
  • the circulation circuit of the heating medium at the time of the indoor-heating operation described above is referred to as an "indoor-heating circuit".
  • the heat accumulating circuit and the indoor-heating circuit can be switched by the switching valve 6.
  • an indoor terminal including a room temperature sensor may be installed.
  • the indoor terminal and the controller 10 are connected to each other so as to be able to transmit data to each other in a wired or wireless manner.
  • the indoor terminal can transmit information on the room temperature detected by the room temperature sensor to the controller 10.
  • the terminal device 21 When the terminal device 21 is installed in the room including the indoor-heating unit 24, the terminal device 21 may include the room temperature sensor and the terminal device 21 may transmit the room temperature information to the controller 10.
  • the room temperature detected by the room temperature sensor is hereinafter referred to as an "actual room temperature".
  • the user can set a value of a desired "target room temperature" with use of the terminal device 21 or the indoor terminal.
  • the controller 10 may end the indoor-heating operation when the actual room temperature reaches the target room temperature on the basis of information received from the indoor terminal or the terminal device 21.
  • the supply temperature detected by the supply temperature sensor 31 is hereinafter referred to as an "actual supply temperature".
  • the controller 10 can execute a feedback control as below so that the actual supply temperature becomes equal to a target supply temperature.
  • the controller 10 can control the actual supply temperature by increasing and reducing the operation speed of the circulation pump 11, that is, increasing and reducing the circulation flow rate of the heating medium.
  • the controller 10 can cause the actual supply temperature to approach the target supply temperature by increasing the circulation flow rate of the heating medium so as to lower the actual supply temperature.
  • the controller 10 can cause the actual supply temperature to approach the target supply temperature by reducing the circulation flow rate of the heating medium so as to raise the actual supply temperature.
  • the controller 10 may control the actual supply temperature by adjusting the heating power of the heat pump device 100 instead of the operation speed of the circulation pump 11.
  • the value of the target supply temperature at the time of the indoor-heating operation may be a value within the range of from 25°C to 60°C, for example.
  • the value of the target supply temperature at the time of the heat accumulating operation may be a value within the range of from 60°C to 80°C, for example.
  • the controller 10 may determine the target supply temperature in the indoor-heating operation in accordance with any of the following methods.
  • the controller 10 deactivates the compressor 13 and the circulation pump 11 when the actual supply temperature exceeds a "first deactivation temperature". As a result, a heating medium of which temperature is too high can be reliably prevented from flowing into the indoor-heating unit 24.
  • the controller 10 may determine the first deactivation temperature on the basis of the target supply temperature. For example, the controller 10 may set a temperature that is higher than the target supply temperature by a predetermined value as the first deactivation temperature. For example, the controller 10 may set a temperature that is higher than the target supply temperature by 2°C as the first deactivation temperature.
  • frost may adhere to the air heat exchanger 17.
  • the heat exchange efficiency of the air heat exchanger 17 decreases, and the heating power of the heat pump device 100 decreases.
  • the controller 10 temporarily suspends the indoor-heating operation and performs the defrosting operation for causing the frost adhering to the air heat exchanger 17 to melt.
  • the controller 10 determines whether the defrosting operation is necessary during the execution of the indoor-heating operation. In this embodiment, whether the defrosting operation is necessary can be determined on the basis of the temperature detected by a defrosting temperature sensor 29.
  • the defrosting temperature sensor 29 detects the temperature of the air heat exchanger 17.
  • the controller 10 determines that the defrosting operation is necessary when the defrosting temperature sensor 29 continuously detects a temperature that is equal to or less than a predetermined threshold value for a predetermined period of time or more.
  • the threshold value may be -3°C, for example.
  • the predetermined period of time may be three minutes, for example.
  • Fig. 3 is a view illustrating a circulation circuit of the refrigerant at the time of the defrosting operation of the heating medium circulation system 1 of Embodiment 1.
  • the arrows in Fig. 3 indicate the directions in which the refrigerant flows.
  • the defrosting operation is as follows.
  • the controller 10 controls hot gas that is high-temperature refrigerant gas compressed by the compressor 13 to flow into the air heat exchanger 17.
  • the opening degree of the decompression device 16 is fully open.
  • the frost melts by the heat of the hot gas flowing into the air heat exchanger 17.
  • the defrosting operation can be performed without switching the flow path of the refrigerant, and hence the defrosting operation can be performed by a simple configuration.
  • the controller 10 deactivates the circulation pump 11 during the defrosting operation.
  • the heating medium does not flow in the heat exchanger 15, and hence a case where the heat of the hot gas discharged from the compressor 13 is removed by the heating medium can be prevented in a more reliable manner.
  • the heat quantity of the hot gas that flows into the air heat exchanger 17 can be caused to be higher, and hence the defrosting capacity can be caused to be higher.
  • the controller 10 determines whether the frost adhering to the air heat exchanger 17 has been able to be removed during the defrosting operation. In this embodiment, it can be determined whether the frost has been able to be removed on the basis of the temperature detected by the defrosting temperature sensor 29. For example, when the defrosting temperature sensor 29 continuously detects a temperature that is equal to or more than a predetermined threshold value for a predetermined period of time or more, the controller 10 determines that the frost has been able to be removed. When it is determined that the frost has been able to be removed, the controller 10 ends the defrosting operation and restarts the indoor-heating operation.
  • Fig. 4 is a graph showing an example of a temporal fluctuation of the actual supply temperature when the operation is switched in the order of the indoor-heating operation, the defrosting operation, and the restart of the indoor-heating operation. The features of Embodiment 1 are described below with reference to Fig. 4 .
  • the example of Fig. 4 is as follows.
  • the target supply temperature is 45°C.
  • the first deactivation temperature is 47°C.
  • the actual supply temperature is stable at a temperature that is approximately equal to the target supply temperature.
  • the controller 10 determines that the defrosting operation is necessary, the operation switches from the indoor-heating operation to the defrosting operation.
  • the time t1 corresponds to a switching time point from the indoor-heating operation to the defrosting operation.
  • the circulation pump 11 deactivates and the heating medium is not supplied to the supply temperature sensor 31 and the indoor-heating terminal 12. Therefore, the actual supply temperature detected by the supply temperature sensor 31 decreases from the time t1.
  • the operation switches from the defrosting operation to the indoor-heating operation. That is, the indoor-heating operation is restarted, the operation of the circulation pump 11 is restarted, and the heating medium is supplied to the supply temperature sensor 31 and the indoor-heating terminal 12.
  • Time t2 in Fig. 4 corresponds to a switching time point from the defrosting operation to the indoor-heating operation.
  • the hot gas from the compressor 13 is supplied to the air heat exchanger 17 through the heat exchanger 15.
  • the temperature of the heat exchanger 15 during the defrosting operation is higher than the temperature of the heat exchanger 15 before the indoor-heating operation starts.
  • the actual supply temperature immediately after the switching from the defrosting operation to the indoor-heating operation rises more rapidly as compared to the actual supply temperature immediately after the indoor-heating operation starts.
  • the actual supply temperature easily overshoots the target supply temperature because the adjustment of the operation speed of the circulation pump 11 or the adjustment of the heating power of the heat pump device 100 is falling behind.
  • the actual supply temperature changes so as to be stable at 45°C after exceeding 45°C that is the target supply temperature and rising to 49°C.
  • the actual supply temperature reaches 47°C that is the first deactivation temperature. Supposing that the controller 10 deactivates the compressor 13 and the circulation pump 11 at the time point at which the actual supply temperature exceeds the first deactivation temperature, the compressor 13 and the circulation pump 11 are deactivated at the time t3.
  • the time t3 is about nine minutes after the time t2 that is the switching time point from the defrosting operation to the indoor-heating operation.
  • the actual room temperature has not reached the target room temperature, and hence the compressor 13 and the circulation pump 11 are not preferred to be deactivated.
  • the controller 10 is configured so as not to deactivate the compressor 13 and the circulation pump 11 even when the actual supply temperature exceeds the first deactivation temperature in the indoor-heating operation in a post-defrosting period.
  • the "post-defrosting period” is a period until a predetermined period of time elapses from the switching time point from the defrosting operation to the indoor-heating operation.
  • the period from the time t2 to time t4 corresponds to the "post-defrosting period”.
  • the above-mentioned predetermined period of time that is, the length of the post-defrosting period is 15 minutes.
  • the length of the post-defrosting period is not limited thereto and may be a period of time within the range of from 10 minutes to one hour, for example. According to this embodiment, the following effects can be obtained, for example.
  • the indoor-heating operation is continued without deactivating the compressor 13 and the circulation pump 11 at the time t3 in Fig. 4 .
  • the compressor 13 and the circulation pump 11 can be prevented from being deactivated when the actual supply temperature suddenly rises after the defrosting operation, and hence the frequency of activating and deactivating the compressor 13 and the circulation pump 11 can be reduced. Therefore, in the operation of the heating medium circulation system 1, energy loss due to the activation and the deactivation of the compressor 13 can be reduced and the life of the compressor 13 can be prevented from decreasing.
  • the actual supply temperature is conceived to be stable around the target supply temperature. That is, in the example of Fig. 4 , in the indoor-heating operation after the time t4, the actual supply temperature is conceived to be stable around the target supply temperature. Therefore, in the indoor-heating operation after the post-defrosting period, the condition of the deactivation temperature at which the compressor 13 and the circulation pump 11 are deactivated does not need to be alleviated. Therefore, in the indoor-heating operation after the post-defrosting period, the controller 10 deactivates the compressor 13 and the circulation pump 11 when the actual supply temperature exceeds the first deactivation temperature. As a result, in the indoor-heating operation after the post-defrosting period, the heating medium of which temperature is higher than the temperature expected by the user can be reliably prevented from flowing into the indoor-heating terminal 12.
  • the controller 10 deactivates the compressor 13 and the circulation pump 11 when the actual supply temperature exceeds a "second deactivation temperature" in the indoor-heating operation in the post-defrosting period.
  • the "second deactivation temperature” is a temperature that is higher than the "first deactivation temperature”.
  • the controller 10 may determine the second deactivation temperature on the basis of the target supply temperature. For example, the controller 10 may set a temperature that is higher than the target supply temperature by a predetermined value as the second deactivation temperature. For example, the controller 10 may set a temperature that is higher than the target supply temperature by 5°C as the second deactivation temperature. In the example of Fig. 4 , the second deactivation temperature is 50°C. According to this embodiment, the following effects are obtained. In the indoor-heating operation in the post-defrosting period, the heating medium of which temperature is higher than the second deactivation temperature can be reliably prevented from flowing into the indoor-heating terminal 12.
  • the heating medium circulation system 1 may include means for enabling the user to set a value of a parameter for determining the second deactivation temperature. For example, the following is possible.
  • the controller 10 determines a value obtained by adding a parameter Y to the target supply temperature as the second deactivation temperature.
  • the value of the parameter Y may be settable by a user with use of the terminal device 21.
  • Embodiment 2 is described, but the differences from Embodiment 1 described above are mainly described, and the description of the same parts or corresponding parts is simplified or omitted.
  • the hardware configuration of the heating medium circulation system 1 of Embodiment 2 is the same as that of Embodiment 1, and hence the illustration thereof is omitted.
  • Embodiment 2 is as follows.
  • the "second deactivation temperature" as in Embodiment 1 is not set.
  • the controller 10 continues, regardless of the actual supply temperature, operation of the compressor 13 and the circulation pump 11 in the indoor-heating operation in the post-defrosting period.
  • the following effects can be obtained.
  • the compressor 13 and the circulation pump 11 can be prevented from being deactivated in a more reliable manner. Therefore, the frequency of activating and deactivating the compressor 13 and the circulation pump 11 can be further reduced as compared to Embodiment 1.
  • the heating medium circulation system 1 may include means for enabling the length of the post-defrosting period, that is, the value of the above-mentioned predetermined period of time to be set by the user.
  • the length of the post-defrosting period may be able to be set by the user with use of the terminal device 21.
  • the length of the post-defrosting period can be determined in a more appropriate manner in accordance with the conditions such as the pipe length of the external passages 22 and 23 and the like, the number of the indoor-heating units 24, and the installation environment, and hence the convenience is enhanced.
  • the controller 10 may deactivate, regardless of the actual supply temperature, the compressor 13 when the actual room temperature reaches the target room temperature. That is, the controller 10 deactivates the compressor 13 when the actual room temperature reaches the target room temperature even when the actual supply temperature is not exceeding the first deactivation temperature. As a result, the room temperature can be reliably prevented from increasing too much, and comfort can be maintained.
  • the controller 10 may limit the first deactivation temperature and the second deactivation temperature so as not to exceed a predetermined upper limit temperature.
  • the upper limit temperature is a temperature in accordance with the heat resistant temperature of the external passage 22 or the heat resistant temperature of the indoor-heating terminal 12, for example. As a result, the external passage 22 and the indoor-heating terminal 12 can be protected in a more reliable manner.
  • the heating medium circulation system 1 may include means for notifying a user of the possibility of the supply temperature becoming higher than normal in the post-defrosting period. For example, the following may be performed.
  • a phrase of "caution high temperature" is displayed on the display of the terminal device 21.
  • the user pays attention so as not to touch the indoor-heating unit 24, and hence actively avoids discomfort in an easier manner.
  • the controller 10 may operate the circulation pump 11 so that the circulation flow rate of the heating medium immediately after the defrosting operation becomes higher than the circulation flow rate of the heating medium immediately before the defrosting operation.
  • the circulation flow rate of the heating medium immediately after the defrosting operation becomes high, the amount of the heating medium that removes heat from the heat exchanger 15 increases, and hence it becomes difficult for the actual supply temperature to rise. Therefore, the rise of the actual supply temperature in the indoor-heating operation in the post-defrosting period can be delayed, and the compressor 13 can be reliably prevented from being deactivated.
  • Embodiments 1 and 2 may be as follows.
  • the controller 10 stores therein an indoor-heating abnormal temperature.
  • the indoor-heating abnormal temperature may be 75°C, for example.
  • the indoor-heating abnormal temperature is a value for determining abnormality such as a failure of the heat pump device 100 or a failure of the circulation pump 11 in the indoor-heating operation.
  • the controller 10 deactivates the compressor 13 and causes the terminal device 21 to notify abnormality to a user of when the actual supply temperature exceeds the indoor-heating abnormal temperature in the indoor-heating operation after the post-defrosting period.
  • the controller 10 continues operation of the compressor 13 and does not execute the notification of the abnormality to the user even when the actual supply temperature exceeds the indoor-heating abnormal temperature in the indoor-heating operation in the post-defrosting period.
  • the compressor 13 can be prevented from being unnecessarily deactivated in a more reliable manner in the indoor-heating operation in the post-defrosting period.
  • the controller 10 may switch the switching valve 6 so that the heating medium from the heat pump device 100 flows into the heat storage tank 2 and not into the indoor-heating terminal 12 when the actual supply temperature exceeds the indoor-heating abnormal temperature in the indoor-heating operation in the post-defrosting period.
  • Each function of the controller 10 included in the heating medium circulation system 1 of Embodiments 1 and 2 may be implemented by a processing circuit.
  • the processing circuit of the controller 10 includes at least one processor 10a and at least one memory 10b.
  • each function of the controller 10 may be implemented by software, firmware, or the combination of the software and the firmware.
  • At least one of the software and the firmware may be described as a program.
  • At least one of the software and the firmware may be stored in at least one memory 10b.
  • At least one processor 10a may implement each function of the controller 10 by reading out and executing the program stored in at least one memory 10b.
  • At least one memory 10b may include a nonvolatile or volatile semiconductor memory, a magnetic disc, and the like.
  • the processing circuit of the controller 10 may include at least one dedicated hardware.
  • the processing circuit may be a single circuit, a composite circuit, a programmed processor, a parallel-programmed processor, an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or a combination thereof, for example.
  • the functions of the units of the controller 10 may be respectively implemented by the processing circuit.
  • the functions of the units of the controller 10 may be implemented by the processing circuit altogether.
  • a part may be implemented by a dedicated hardware, and another part may be implemented by software or firmware.
  • the processing circuit may implement each function of the controller 10 by hardware, software, firmware, or a combination thereof.
  • a configuration in which the operation of the heating medium circulation system 1 is controlled by a plurality of controllers cooperating can be used.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Claims (9)

  1. Système de circulation de milieu chauffant (1), comprenant :
    un moyen chauffant (100) pour chauffer un milieu chauffant liquide, le moyen chauffant (100) comprenant :
    un échangeur de chaleur à air (17) conçu pour échanger de la chaleur entre un réfrigérant et l'air ; et
    un compresseur (13) conçu pour comprimer le réfrigérant ;
    une pompe (11) conçue pour faire circuler le milieu chauffant à travers un circuit de circulation passant à travers une borne de chauffage intérieur (12) et le moyen chauffant (100) ;
    un moyen de commande (10) connecté électriquement au moyen chauffant (100) et à la pompe (11), le moyen de commande (10) étant conçu pour exécuter une opération de chauffage intérieur pour fournir le milieu chauffant chauffé par le moyen chauffant (100) à la borne de chauffage intérieur (12) et une opération de dégivrage pour amener le givre adhérant à l'échangeur de chaleur à air (17) à fondre ; et
    un moyen (31) pour détecter une température d'alimentation qui est une température du milieu chauffant fourni à la borne de chauffage intérieur (12) par le moyen chauffant (100), caractérisé en ce que
    le moyen de commande (10) est conçu pour désactiver le compresseur (13) lorsque la température d'alimentation dépasse une première température de désactivation pendant l'opération de chauffage intérieur après qu'une période de temps prédéfinie s'est écoulée depuis un point temporel de commutation de l'opération de dégivrage vers l'opération de chauffage intérieur,
    et le moyen de commande (10) étant conçu pour ne pas désactiver le compresseur (13) lorsque la température d'alimentation dépasse la première température de désactivation pendant l'opération de chauffage intérieur dans une période post-dégivrage qui est une période jusqu'à ce que la période de temps prédéfinie s'écoule à partir du point temporel de commutation.
  2. Système de circulation de milieu chauffant (1) selon la revendication 1 :
    une seconde température de désactivation étant une température qui est supérieure à la première température de désactivation ; et
    le moyen de commande (10) étant conçu pour désactiver le compresseur (13) lorsque la température d'alimentation dépasse la seconde température de désactivation pendant l'opération de chauffage intérieur pendant la période post-dégivrage.
  3. Système de circulation de milieu chauffant (1) selon la revendication 1, le moyen de commande (10) étant conçu, indépendamment de la température d'alimentation, pour ne pas désactiver le compresseur (13) pendant l'opération de chauffage intérieur pendant la période post-dégivrage.
  4. Système de circulation de milieu chauffant (1) selon l'une quelconque des revendications 1 à 3, comprenant en outre un moyen (21) pour permettre à une valeur de la période de temps prédéfinie d'être réglée par un utilisateur.
  5. Système de circulation de milieu chauffant (1) selon la revendication 2, comprenant en outre un moyen (21) pour permettre à une valeur d'un paramètre pour déterminer la seconde température de désactivation d'être réglée par un utilisateur.
  6. Système de circulation de milieu chauffant (1) selon l'une quelconque des revendications 1 à 5, comprenant en outre un moyen (21) pour détecter une température ambiante réelle qui est une température d'un espace dans lequel le terminal de chauffage intérieur (12) est installé, le moyen de commande (10) étant conçu, indépendamment de la température d'alimentation, pour désactiver le compresseur (13) lorsque la température ambiante réelle atteint une température ambiante de consigne.
  7. Système de circulation de milieu chauffant (1) selon l'une quelconque des revendications 1 à 6, comprenant en outre un moyen (21) pour informer un utilisateur de la possibilité que la température d'alimentation devienne plus élevée que la normale pendant la période post-dégivrage.
  8. Système de circulation de milieu chauffant (1) selon l'une quelconque des revendications 1 à 7, le moyen de commande (10) étant conçu pour commander le fonctionnement de la pompe (11) de sorte qu'un débit de circulation du milieu chauffant immédiatement après l'opération de dégivrage soit supérieur à un débit de circulation du milieu chauffant immédiatement avant l'opération de dégivrage.
  9. Système de circulation de milieu chauffant (1) selon l'une quelconque des revendications 1 à 8, comprenant en outre un moyen de notification (21) pour notifier une information à un utilisateur,
    pendant l'opération de chauffage intérieur après la période post-dégivrage, le moyen de commande (10) étant conçu, si la température d'alimentation dépasse une température anormale de chauffage intérieur, pour exécuter la désactivation du compresseur (13) et amener le moyen de notification (21) à faire une notification d'anomalie,
    et, pendant l'opération de chauffage intérieur pendant la période post-dégivrage, le moyen de commande (10) étant conçu pour ne pas exécuter la désactivation du compresseur (13) et ne pas amener le moyen de notification (21) à faire une notification d'anomalie même si la température d'alimentation dépasse la température anormale de chauffage intérieur.
EP17904897.0A 2017-04-07 2017-04-07 Système de circulation de milieu chauffant Not-in-force EP3608603B1 (fr)

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* Cited by examiner, † Cited by third party
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DE102021104741A1 (de) 2021-02-26 2022-09-01 Robert Bosch Gesellschaft mit beschränkter Haftung Heizeinrichtung, Heizsystem und Verfahren
WO2022189186A1 (fr) 2021-03-10 2022-09-15 Viessmann Climate Solutions Se Procédé, produit programme d'ordinateur et système de surveillance de pompe à chaleur

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JP7285724B2 (ja) * 2019-07-30 2023-06-02 東京エレクトロン株式会社 基板処理装置、及び基板処理方法

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JP4239922B2 (ja) 2004-07-30 2009-03-18 ダイキン工業株式会社 床暖房装置
JP4743039B2 (ja) * 2006-08-07 2011-08-10 ダイキン工業株式会社 建物において温水を循環させて暖房を行う温水循環暖房システム
JP5310432B2 (ja) * 2009-09-17 2013-10-09 パナソニック株式会社 ヒートポンプ式温水暖房装置
JP6428373B2 (ja) * 2015-02-26 2018-11-28 株式会社富士通ゼネラル ヒートポンプ式暖房給湯装置

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021104741A1 (de) 2021-02-26 2022-09-01 Robert Bosch Gesellschaft mit beschränkter Haftung Heizeinrichtung, Heizsystem und Verfahren
WO2022189186A1 (fr) 2021-03-10 2022-09-15 Viessmann Climate Solutions Se Procédé, produit programme d'ordinateur et système de surveillance de pompe à chaleur
DE102021105836A1 (de) 2021-03-10 2022-09-15 Viessmann Climate Solutions Se Verfahren, computerprogramm-produkt und system zum überwachen einer wärmepumpe

Also Published As

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EP3608603A1 (fr) 2020-02-12
EP3608603A4 (fr) 2020-02-12
JP6721116B2 (ja) 2020-07-08
WO2018185938A1 (fr) 2018-10-11
JPWO2018185938A1 (ja) 2019-11-07

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