WO2014115496A1 - 暖房システム - Google Patents

暖房システム Download PDF

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Publication number
WO2014115496A1
WO2014115496A1 PCT/JP2014/000070 JP2014000070W WO2014115496A1 WO 2014115496 A1 WO2014115496 A1 WO 2014115496A1 JP 2014000070 W JP2014000070 W JP 2014000070W WO 2014115496 A1 WO2014115496 A1 WO 2014115496A1
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WO
WIPO (PCT)
Prior art keywords
heat
refrigerant
hot water
heat exchanger
temperature
Prior art date
Application number
PCT/JP2014/000070
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
▲祥▼▲隆▼ 久米
Original Assignee
株式会社デンソー
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Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to DE112014000525.8T priority Critical patent/DE112014000525T5/de
Publication of WO2014115496A1 publication Critical patent/WO2014115496A1/ja

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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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • 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
    • F24D11/0257—Central heating systems using heat accumulated in storage masses using heat pumps air 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
    • 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
    • F24D11/0257—Central heating systems using heat accumulated in storage masses using heat pumps air heating system
    • F24D11/0264—Central heating systems using heat accumulated in storage masses using heat pumps air heating system combined with solar energy
    • 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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0015—Domestic hot-water supply systems using solar energy
    • F24D17/0021—Domestic hot-water supply systems using solar energy with accumulation of the heated water
    • 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
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/106—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump and solar energy
    • 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
    • F24D19/1084—Arrangement or mounting of control or safety devices for air heating systems
    • F24D19/1093—Arrangement or mounting of control or safety devices for air heating systems system using a heat pump and solar energy
    • 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
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/02—Hot-air central heating systems; Exhaust gas central heating systems operating with discharge of hot air into the space or area to be heated
    • F24D5/04—Hot-air central heating systems; Exhaust gas central heating systems operating with discharge of hot air into the space or area to be heated with return of the air or the air-heater
    • 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
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/12—Hot-air central heating systems; Exhaust gas central heating systems using heat pumps
    • 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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
    • 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
    • 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
    • F24D2200/14—Solar energy
    • 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
    • F24D2200/16—Waste heat
    • F24D2200/22—Ventilation air
    • 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
    • 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
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • 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
    • F24H15/227—Temperature of the refrigerant in heat pump cycles
    • F24H15/231—Temperature of the refrigerant in heat pump cycles at the evaporator
    • 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
    • F24H15/242—Pressure
    • 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
    • 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
    • F24H15/375—Control of heat pumps
    • F24H15/385—Control of expansion valves 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
    • F24H15/40—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
    • 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
    • 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
    • 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
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/13—Hot air central heating systems using heat pumps
    • 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
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Definitions

  • the present disclosure relates to a heating system including a heat pump cycle.
  • Patent Document 1 a heating medium (hot water) heated by a heat pump cycle is used as a panel heater or a floor heating device disposed in each room (heating target space) such as a living room, a kitchen, and a bedroom in a residential house.
  • a heating system for heating each room by supplying to a heating device is disclosed.
  • the heating system disclosed in Patent Document 1 exchanges heat between exhaust (inside air) exhausted from the room to the outside of the room and ventilating air (outside air) taken into the room from the outside when the room is ventilated.
  • a ventilation heat exchanger for heating and a heating heat exchanger for heating the supply air using hot water flowing out from a heating device arranged in each room as a heat source are provided. And it is going to suppress the temperature fall in the room by ventilation by heating supply air with these two heat exchangers.
  • the enthalpy of the high-pressure side refrigerant is reduced by exchanging heat between the relatively low temperature hot water flowing out from the heat exchanger for heating and the high-pressure side refrigerant of the heat pump cycle.
  • the coefficient of performance (COP) of the heat pump cycle is being improved.
  • the heating system of Patent Document 1 is configured to perform heating of each room using hot water heated in the heat pump cycle as a heat source, so that the coefficient of performance (COP) of the heat pump cycle is reduced. It is difficult to heat each room by heating the supply air sufficiently with a ventilation heat exchanger and a heating heat exchanger. For this reason, in the heating system of Patent Document 1, for example, when the outside air temperature is low, the temperature drop in the room due to ventilation may not be sufficiently suppressed.
  • the ventilation heat exchanger uses exhaust as a heat source, the supply air cannot be sufficiently heated at a low outside temperature or the like.
  • the temperature of the hot water flowing into the heat exchanger for heating can be sufficiently increased by increasing the temperature of the hot water flowing into the heat exchanger for heating, but the temperature of the hot water flowing into the heat exchanger for heating is increased. Is raised, the temperature of the hot water flowing out from the heat exchanger for heating also rises. Therefore, the COP of the heat pump cycle is reduced.
  • a heating system in the present disclosure includes a compressor that compresses and discharges a refrigerant, and a decompressor that depressurizes the refrigerant that has been pressurized by the compressor.
  • a heat pump cycle a ventilation heat exchanger for exchanging heat between the exhaust exhausted from the heating target space to the outside and the supply air taken into the heating target space from the outside, and the refrigerant discharged from the compressor and the compressor
  • Heat exchange with a high temperature side heater core that heats the supply air that has flowed out of the ventilation heat exchanger, a refrigerant that flows into the decompressor, and a refrigerant that flows into the decompressor, using either one of the heat mediums heated by the refrigerant as a heat source
  • a low-temperature side heater core that heats the supply air flowing into the ventilation heat exchanger by lowering the temperature of any one of the heat mediums to be heated.
  • the supply air heated by the ventilation heat exchanger can be further heated to raise the temperature of the supply air taken into the space to be heated.
  • one of the refrigerant discharged from the compressor and the heat medium heated by the refrigerant discharged from the compressor is used as a heat source. The temperature can be sufficiently raised to a certain level.
  • the supply air flowing into the ventilation heat exchanger can be heated to raise the temperature of the supply air taken into the space to be heated.
  • the temperature of one of the refrigerant flowing into the pressure reducer and the heat medium exchanging heat with the refrigerant flowing into the pressure reducer is lowered, so the enthalpy of the refrigerant flowing into the pressure reducer is lowered.
  • the coefficient of performance of the heat pump cycle can be improved.
  • the heat medium heated by the refrigerant discharged from the compressor is not limited to the heat medium directly heated by the refrigerant discharged from the compressor by a heat exchanger or the like, and is discharged from the compressor.
  • the heat medium that exchanges heat with the refrigerant that flows into the decompressor is not limited to the heat medium that directly exchanges heat with the refrigerant that flows into the decompressor using a heat exchanger or the like. Heat medium that indirectly exchanges heat.
  • the heating system in the present disclosure includes a heat medium-refrigerant heat exchanger in which the heat pump cycle heat-exchanges the refrigerant discharged from the compressor and the heat medium to heat the heat medium.
  • the refrigerant flowing out from the medium-refrigerant heat exchanger is decompressed, and the high temperature side heater core uses the heat medium heated by the heat medium-refrigerant heat exchanger as a heat source to supply the air that has flowed out of the ventilation heat exchanger. And may be heated.
  • the low temperature side heater core may heat the supply air flowing into the ventilation heat exchanger by lowering the temperature of the heat medium that exchanges heat with the refrigerant flowing into the decompressor.
  • this heat medium may be used as a heat source for heating equipment that requires a heat source in a temperature range different from that of the high-temperature side heater core and the low-temperature side heater core. it can.
  • the heating system 1 is applied to a residential house and heats each room (heating target space) such as a living room, a kitchen, and a bedroom. Furthermore, this residential house is a highly airtight house called a so-called high airtight house, and requires constant ventilation.
  • the heating system 1 includes a heat pump cycle 10 that heats hot water, a hot water storage tank 20 that stores hot water heated by the heat pump cycle 10, and indoor ventilation.
  • a supply air heating unit 30 for heating supply air (outside air) taken into the room from the outside is provided.
  • the heat pump cycle 10 is a vapor compression refrigeration cycle configured by sequentially connecting a compressor 11, a water-refrigerant heat exchanger 12, an electric expansion valve 13, an evaporator 14 and the like with refrigerant pipes.
  • this heat pump cycle 10 employs carbon dioxide as a refrigerant, and the refrigerant pressure on the high pressure side of the cycle from the discharge port side of the compressor 11 to the inlet side of the electric expansion valve 13 is equal to or higher than the critical pressure of the refrigerant.
  • the refrigerant is mixed with refrigerating machine oil for lubricating the compressor 11, and a part of the refrigerating machine oil circulates in the cycle together with the refrigerant.
  • the compressor 11 sucks the refrigerant in the heat pump cycle 10 and compresses and discharges the refrigerant until it reaches a critical pressure or higher.
  • an electric compressor that drives a fixed displacement compression mechanism with a fixed discharge capacity by an electric motor is employed as the compressor 11.
  • the operation (the number of rotations) of the electric motor of the compressor 11 is controlled by a control signal output from a control device described later.
  • the water-refrigerant heat exchanger 12 heats the hot water by exchanging heat between the refrigerant discharged from the compressor 11 and the hot water.
  • Hot water is a fluid to be heated in the heat pump cycle 10 and is stored in a hot water storage tank 20 described later, and then supplied to a kitchen or a bath. Further, the hot water supply also serves as a heat medium for transferring the heat generated in the heat pump cycle 10 to the hot water stored in the hot water storage tank 20.
  • the water-refrigerant heat exchanger 12 constitutes the heat medium-refrigerant heat exchanger described in the claims.
  • a water-refrigerant heat exchanger 12 a plurality of tubes for circulating the refrigerant are provided as the refrigerant passage 12a, a water passage 12b is formed between adjacent tubes, and the refrigerant, cooling water, It is possible to employ a heat exchanger or the like configured by arranging inner fins that promote heat exchange between the two.
  • the water-refrigerant heat exchanger 12 is a counter flow type heat exchanger in which the flow direction of the refrigerant flowing through the refrigerant passage 12a and the flow direction of hot water flowing through the water passage 12b are opposite flows. Adopted.
  • heat is exchanged between the refrigerant on the inlet side of the refrigerant passage 12a and hot water on the outlet side of the water passage 12b, and heat is supplied to the refrigerant on the outlet side of the refrigerant passage 12a and the hot water on the inlet side of the water passage 12b. Since it can be exchanged, the temperature difference between the hot water and the refrigerant can be ensured over the entire heat exchange region, and the heat exchange efficiency can be improved.
  • the heat pump cycle 10 constitutes a supercritical refrigeration cycle as described above, in the refrigerant passage 12a of the water-refrigerant heat exchanger 12, the refrigerant does not condense and dissipates heat in the supercritical state. Reduce enthalpy.
  • the electric expansion valve 13 is a decompressor that decompresses the refrigerant flowing out from the refrigerant passage 12a of the water-refrigerant heat exchanger 12.
  • the electric expansion valve 13 is a variable throttle mechanism that includes a valve body that can change the throttle opening degree and an electric actuator that changes the throttle opening degree of the valve body. . Further, the operation of the electric actuator is controlled by a control signal output from the control device.
  • the evaporator 14 evaporates the refrigerant decompressed by the electric expansion valve 13 by exchanging heat with the outside air or exhaust gas flowing out from the ventilation heat exchanger 34 of the air supply heating unit 30 described later.
  • a fin-and-tube heat exchanger or the like can be employed as such an evaporator 14.
  • the refrigerant outlet side of the evaporator 14 is connected to the suction port side of the compressor 11.
  • the component devices 11 to 14 of the heat pump cycle 10 are accommodated in one housing or one frame structure, and the heat pump unit As a single unit.
  • the hot water storage tank 20 is formed of a metal (for example, stainless steel) having excellent corrosion resistance.
  • the hot water storage tank 20 has a heat insulating structure whose outer periphery is covered with a heat insulating material or a vacuum heat insulating structure using a double tank, and is a hot water tank that can keep hot hot water hot for a long time.
  • the hot water storage tank 20 is also arranged outside the room.
  • Hot water stored in the hot water storage tank 20 is discharged from a hot water outlet provided in the upper part of the hot water storage tank 20, mixed with cold water from a water tap at a temperature control valve (not shown), and then adjusted in temperature (specifically Hot water is supplied to kitchens and baths. Further, tap water is supplied from a water supply port provided in the lower part of the hot water storage tank 20, and hot water for the amount of hot water supplied is replenished.
  • the hot water storage tank 20 is connected to the water passage 12 b of the water-refrigerant heat exchanger 12 of the heat pump cycle 10 by the first water circulation circuit 21.
  • the first water circulation circuit 21 is a water circulation circuit that circulates hot water between the hot water storage tank 20 and the water-refrigerant heat exchanger 12.
  • the first water circulation circuit 21 is provided with a first water circulation pump 22 as a water pressure feeding unit for circulating hot water.
  • the first water circulation pump 22 sucks hot water flowing out from a hot water outlet provided at the lower side of the hot water storage tank 20 and pumps the hot water into the water passage 12 b of the water-refrigerant heat exchanger 12. It is a water pump. Further, the operation (rotation speed) of the first water circulation pump 22 is controlled by a control signal output from the control device.
  • the first water circulation pump 22 when the first water circulation pump 22 is operated, hot water is supplied from the hot water outlet provided at the lower side of the hot water storage tank 20 ⁇ the first water circulation pump 22 ⁇ the water passage 12b of the water-refrigerant heat exchanger 12 ⁇ the hot water storage tank. It circulates in order of the hot water supply inlet provided on the upper side of 20. Accordingly, the hot water heated by the water-refrigerant heat exchanger 12 flows out to the upper side of the hot water storage tank 20, and the temperature distribution in which the temperature of the hot water is decreased from the upper side to the lower side in the hot water storage tank 20. Occurs.
  • thermoelectric heat exchanger 12 since a counter-flow type heat exchanger is adopted as the water-refrigerant heat exchanger 12, hot water flowing out from the hot water outlet provided on the lower side of the hot water storage tank 20 is Heat exchange is performed with a refrigerant having a relatively low enthalpy flowing in the refrigerant flow downstream of the refrigerant passage 12a of the water-refrigerant heat exchanger 12. That is, the low-temperature hot-water supply on the lower side of the hot water storage tank 20 is exchanged by the water-refrigerant heat exchanger 12 with a heat medium that directly exchanges heat with the refrigerant flowing into the electric expansion valve 13 on the downstream side of the refrigerant passage 12a. Become.
  • hot water flowing out of the water passage 12b of the water-refrigerant heat exchanger 12 exchanges heat with a refrigerant having a relatively high enthalpy flowing through the refrigerant flow upstream side of the refrigerant passage 12a of the water-refrigerant heat exchanger 12. Heated. That is, the hot hot water on the upper side of the hot water storage tank 20 becomes a heat medium directly heated by the high-temperature high-pressure refrigerant discharged from the compressor 11 of the heat pump cycle 10 in the water-refrigerant heat exchanger 12. .
  • an exhaust air fan 32a, an air supply fan 33a, a ventilation heat exchanger 34, a high temperature side heater core 35 for heating the supply air, and a low temperature side heater core 36 are accommodated. It is configured.
  • the exhaust blower fan 32a is an electric blower that blows exhaust air from the room to the outside, and is disposed on the most upstream side of the exhaust air flow path 32.
  • the supply air blower fan 33 a is an electric blower that blows supply air from the outside to the inside of the room, and is disposed on the most upstream side of the supply air flow path 33. Further, both the exhaust blower fan 32a and the supply air blower fan 33a are controlled in operating rate, that is, the rotation speed (the amount of air to be blown) by the control voltage output from the control device.
  • the ventilation heat exchanger 34 exchanges heat between the exhaust and the air supply when the room is ventilated. Therefore, the ventilation heat exchanger 34 can heat the supply air by, for example, exchanging heat between the high-temperature exhaust and the low-temperature supply air during indoor heating. That is, the ventilation heat exchanger 34 functions to suppress the temperature drop in the room due to ventilation by recovering the heat energy that is exhausted to the outside of the room together with the exhaust during heating, and heating the supply air.
  • a ventilation heat exchanger 34 plate surfaces of a plurality of metal plates (for example, an aluminum plate and a copper plate) having excellent heat conductivity are stacked in parallel to each other, and an exhaust passage and an intake passage are provided between adjacent metal plates.
  • metal plates for example, an aluminum plate and a copper plate
  • heat exchangers configured by disposing inner fins for promoting heat exchange between the exhaust and the supply air inside the respective exhaust passages and the supply passages can be employed.
  • the ventilation heat exchanger 34 can cool the supply air by, for example, exchanging heat between the high-temperature air supply and the low-temperature exhaust during indoor cooling.
  • the high temperature side heater core 35 circulates hot water therein, and heat supply for heating on the high temperature side that heats the supply air flowing out from the ventilation heat exchanger 34 (supply air downstream of the ventilation heat exchanger 34) using this warm water as a heat source. It is a vessel.
  • the low-temperature side heater core 36 circulates hot water that has flowed out of the high-temperature side heater core 35 and reduced in temperature therein, and uses this hot water as a heat source to flow into the ventilation heat exchanger 34 (the supply air upstream of the ventilation heat exchanger 34). This is a heat exchanger for heating on the low temperature side for heating the gas.
  • the high temperature side heater core 35 and the low temperature side heater core 36 are arranged in a second water circulation circuit 37 for circulating hot water, and are connected to a hot water passage 38 arranged in the hot water storage tank 20.
  • the second water circulation circuit 37 is a water circulation circuit that circulates hot water among the hot water passage 38, the high temperature side heater core 35, and the low temperature side heater core 36. Further, the second water circulation circuit 37 is provided with a second water circulation pump 39 as a water pressure feeding section for circulating hot water.
  • the hot water circulating in the second water circulation circuit 37 is a heat medium that moves the heat of hot water stored in the hot water storage tank 20 to the supply air, and uses the same tap water or ethylene glycol aqueous solution as the hot water. Can be adopted. That is, in the heating system 1, the heat generated in the heat pump cycle 10 is moved to the intake air via two types of heat media, hot water and hot water.
  • the hot water passage 38 is arranged to extend in the vertical direction while meandering in the hot water storage tank 20. Therefore, by circulating the hot water through the hot water passage 38, the hot water can be heated using hot water stored in the hot water storage tank 20 as a heat source.
  • the hot water inlet of the hot water passage 38 is provided below the hot water storage tank 20, and the hot water outlet of the hot water passage 38 is provided above the hot water storage tank 20.
  • the hot water supply in the hot water storage tank 20 has a temperature distribution in which the temperature increases from the lower side to the upper side, so that the hot water flowing through the hot water passage 38 is also from the lower side (hot water inlet side). The temperature increases toward the upper side (warm water outlet side).
  • the second water circulation pump 39 is an electric water pump that sucks the hot water flowing out from the low temperature side heater core 36 and pumps it to the hot water inlet side of the hot water passage 38.
  • the operation (rotation speed) of the second water circulation pump 39 is controlled by a control signal output from the control device.
  • the hot water is arranged at the second water circulation pump 39 ⁇ the hot water inlet of the hot water passage 38 arranged at the lower side of the hot water storage tank ⁇ the hot water passage 38 ⁇ at the upper side of the hot water storage tank.
  • the hot water passage 38 circulates in the order of hot water outlet ⁇ high temperature side heater core 35 ⁇ low temperature side heater core 36.
  • the exhaust gas flowing out from the ventilation heat exchanger 34 on the downstream side of the exhaust ventilation path 32 is sent to the evaporator 14 side of the heat pump cycle 10 as shown by a thick broken line arrow in FIG. 1.
  • a guiding duct (not shown) is connected.
  • a control device (not shown) includes a known microcomputer including a CPU, a ROM, a RAM, and the like and peripheral circuits thereof. This control device performs various calculations and processes based on the control program stored in the ROM, and controls the operations of the various electric actuators 11, 13, 22, 32a, 33a, 39, etc. described above.
  • a sensor group for various controls such as a high-pressure sensor, a boiling temperature sensor, an evaporator temperature sensor, an outside air temperature sensor, an in-tank temperature sensor, and a hot water temperature sensor is connected to the input side of the control device.
  • a signal is input to the controller.
  • the high pressure side pressure sensor is a high pressure side pressure detector that detects the high pressure side refrigerant pressure Pd of the high pressure refrigerant discharged from the compressor 11.
  • the boiling temperature sensor is a boiling temperature detector that detects the boiling temperature Two of hot water flowing out from the water passage of the water-refrigerant heat exchanger 12.
  • the evaporator temperature sensor is an evaporator temperature detector that detects a refrigerant evaporation temperature (temperature of the evaporator 14) Ts in the evaporator 14.
  • the outside air temperature sensor is an outside air temperature detector that detects the outside air temperature Tam.
  • the tank internal temperature sensor is a tank internal temperature detector that detects the temperature Tt of hot water stored in the hot water storage tank 20.
  • the hot water temperature sensor is a hot water temperature detector that detects an outlet temperature Tout of hot water flowing out from the hot water passage 38.
  • an operation panel (not shown) is connected to the input side of the control device.
  • This operation panel is provided with an operation switch for outputting an operation signal for requesting the operation of the heating system 1, a temperature setting switch for setting a boiling temperature (target heating temperature) of hot water, and the operation signals of these switches. Is input to the controller.
  • control device is configured such that a control unit that controls various devices to be controlled connected to the output side is integrally configured.
  • movement of each control object apparatus among the control apparatuses comprises the control part which controls the operation
  • the configuration (hardware and software) that controls the operation (refrigerant discharge capacity) of the compressor 11 constitutes the compressor control unit.
  • You may comprise a compressor control part with another apparatus with respect to a control apparatus.
  • the operation signal of the operation panel and the detection signal detected by the control sensor group described above are read. Based on the read operation signal and detection signal, the control state (specifically, the control signal or control voltage output to each control target device) of each control target device connected to the output side of the control device is determined. To do.
  • the control map stored in the ROM of the control device is referred to based on the hot water temperature setting signal from the operation panel and the outside air temperature Tam detected by the outside air temperature sensor. Determined. Specifically, the rotational speed (refrigerant discharge capacity) of the compressor 1 is determined to increase as the set temperature is increased by the hot water supply temperature setting signal and the outside air temperature Tam is decreased.
  • control signal output to the electric actuator of the electric expansion valve 13 is determined so that the high-pressure side refrigerant pressure Pd of the heat pump cycle 10 becomes the target high pressure.
  • the target high pressure is determined so that the coefficient of performance (COP) of the heat pump cycle 10 is maximized based on the outside air temperature Tam and the rotational speed of the compressor 11 with reference to the control map stored in the ROM of the control device. Is done.
  • the boiling temperature of the hot water flowing out from the water passage 12b of the water-refrigerant heat exchanger 12 is used by using a feedback control method or the like. Two is determined so as to approach the target heating temperature (for example, 80 ° C. to 90 ° C.) set by the temperature setting switch.
  • the control voltage output to the exhaust air fan 32a and the air supply fan 33a is determined so that the exhaust air fan 32a and the air supply fan 33a can exhibit a predetermined air blowing capability.
  • the exit temperature Tout of the warm water which flows out from the warm water channel 38 (the warm water which flows into the high temperature side heater core 35) Temperature) is determined to be a predetermined reference temperature (40 ° C. to 50 ° C. in the first embodiment).
  • This reference temperature is determined so that the supply air heat-exchanged with the hot water flowing out from the hot water passage 38 in the high-temperature side heater core 35 becomes a temperature (for example, 30 ° C. to 40 ° C.) at which the indoor heating can be appropriately realized. Value.
  • control signal and the control voltage determined as described above are output to various control target devices. Then, the heat pump cycle 10 is operated so that the temperature Tt of the hot water stored in the hot water storage tank 20 approaches the target heating temperature set by the temperature setting switch.
  • control device reads the detection signal and the operation signal at a predetermined control cycle until the operation switch of the operation panel is turned off and the operation stop of the heating system 1 is requested.
  • Control routines such as state determination ⁇ output of control voltages and control signals to various devices to be controlled are repeated.
  • the heating system 1 when the heating system 1 is operated, in the heat pump cycle 10, the high-temperature and high-pressure refrigerant discharged from the compressor 11 flows into the refrigerant passage 12a of the water-refrigerant heat exchanger 12 and flows through the water passage 12b. Heat is released to cool down. Thereby, the hot water supplied through the water passage 12b is heated.
  • the high-pressure refrigerant that has flowed out of the refrigerant passage 12a flows into the electric expansion valve 13 and is decompressed until it becomes a low-pressure refrigerant.
  • the low-pressure refrigerant decompressed by the electric expansion valve 13 flows into the evaporator 14, absorbs heat from the exhaust gas flowing out from the exhaust ventilation path 32 of the supply air heating unit 30, and evaporates.
  • the refrigerant flowing out of the evaporator 14 is sucked into the compressor 11 and compressed again.
  • the relatively low temperature hot water supplied from the first water circulation pump 22 on the lower side of the hot water storage tank 20 is heated when it flows through the water passage 12 b of the water-refrigerant heat exchanger 12. Is done. Hot water that has been heated by the water-refrigerant heat exchanger 12 to a high temperature is stored above the hot water storage tank 20.
  • the warm water flows out from the warm water outlet on the upper side of the warm water passage 38.
  • the hot water flowing out from the hot water outlet of the hot water passage 38 is heated by the hot water supply at a relatively high temperature above the hot water storage tank 20 and rises in temperature until it reaches the reference temperature.
  • the hot water whose temperature has risen to the reference temperature flows into the high temperature side heater core 35 and exchanges heat with the supply air flowing out from the ventilation heat exchanger 34 to dissipate heat. Thereby, the supply air flowing out from the ventilation heat exchanger 34 is heated until it reaches a temperature at which the room can be appropriately heated.
  • the high temperature side heater core 35 flows out of the ventilation heat exchanger 34 using hot water (heat medium) indirectly heated via hot water by the high temperature and high pressure refrigerant discharged from the compressor 11 of the heat pump cycle 10 as a heat source. Heating the air supply.
  • the hot water whose temperature has been reduced by releasing heat to the supply air at the high temperature side heater core 35 flows into the low temperature side heater core 36.
  • the hot water flowing into the low temperature side heater core 36 exchanges heat with the supply air that is blown from the supply air blowing fan 33a and flows into the ventilation heat exchanger 34, and dissipates heat. Thereby, the supply air flowing into the ventilation heat exchanger 34 is heated.
  • the hot water flowing out from the low temperature side heater core 36 is sucked into the second water circulation pump 39 and pumped to the hot water inlet side of the hot water passage 38 disposed on the lower side in the hot water storage tank 20.
  • hot water supplied to the lower side of the hot water storage tank 20 that exchanges heat with the hot water on the upstream side (the hot water inlet side) of the hot water flowing through the hot water passage 38 is supplied from the first water circulation pump 22 to the water-refrigerant heat exchanger.
  • the heat is exchanged with the refrigerant that is pumped to the 12 water passages 12 b and flows into the electric expansion valve 13 on the outlet side of the refrigerant passage 12 a of the water-refrigerant heat exchanger 12.
  • the temperature of the hot water (heat medium) that indirectly exchanges heat via the refrigerant flowing into the electric expansion valve 13 and the hot water supply is lowered, and the supply water that flows into the ventilation heat exchanger 34 is reduced.
  • Qi is heating up.
  • the supply air (outside air) blown from the supply air blowing fan 33a is heated by the low-temperature side heater core 36 and flows into the supply passage of the ventilation heat exchanger 34.
  • the supply air that has flowed into the supply passage of the ventilation heat exchanger 34 is exchanged with the exhaust (inside air) that is blown from the exhaust blower fan 32 a and flows through the exhaust passage of the ventilation heat exchanger 34.
  • the supply air that has flowed out of the ventilation heat exchanger 34 is further heated by the high-temperature heater core 35 and blown into each room that is a space to be heated through a duct (not shown), while it flows out of the ventilation heat exchanger 34.
  • the exhausted air is blown to the evaporator 14 side of the heat pump cycle 10 through the exhaust ventilation path 32 and a duct (not shown).
  • hot water heated by the water-refrigerant heat exchanger 2 of the heat pump cycle 10 can be stored in the hot water storage tank 20. Furthermore, heating of each room
  • the heat medium heated indirectly through the hot water by the heat generated in the heat pump cycle 10 is used as a heat source to heat the supply air taken into the space to be heated.
  • the supply air can be sufficiently and easily raised to a temperature required for heating the space to be heated.
  • the temperature of the hot water that exchanges heat with the refrigerant that flows into the electric expansion valve 13 is lowered by exchanging heat between the hot water and the supply air that flows into the ventilation heat exchanger 34 by the low-temperature side heater core 36. Accordingly, the coefficient of performance (COP) of the heat pump cycle can be improved by reducing the enthalpy of the refrigerant flowing into the electric expansion valve 13.
  • the COP of the heat pump cycle 10 is not reduced.
  • the supply air taken into the space to be heated from outside can be sufficiently heated.
  • the supply air flowing out from the ventilation heat exchanger 34 is heated using the hot water heated by the hot water supply as a heat source.
  • the maximum temperature of the hot water in the hot water storage tank 20 and the maximum temperature of the hot water flowing into the high temperature side heater core 35 can be set to different values.
  • the hot water stored in the hot water storage tank 20 can also be used as a heat source for a heating device (or a heating device) that requires a heat source in a temperature range different from that of the high temperature side heater core 35 or the low temperature side heater core 36. .
  • the evaporator 14 exchanges heat between the refrigerant and the exhaust gas flowing out from the ventilation heat exchanger 34. Therefore, the heat of the exhaust gas can be effectively utilized to heat the hot water supply by causing the refrigerant to absorb the heat. As a result, the thermal energy of the exhaust can be prevented from being released to the outside, and the thermal energy of the exhaust can be effectively used for heating the room.
  • the operation of the heating system 1 when heating the room is described.
  • the hot water supply water may be operated without heating the room.
  • the operation of the exhaust air fan 32a, the air supply fan 33a, and the second water circulation pump 39 is stopped, and the evaporator 14 may be operated so that the refrigerant absorbs heat from the outside air and evaporates.
  • the room may be heated without heating the hot water.
  • the operation of the compressor 11, the electric expansion valve 13, and the first water circulation pump 22 may be stopped.
  • the configuration and the like of the low-temperature side heater core 36 are changed as shown in the schematic overall configuration diagram of FIG. 2 with respect to the first embodiment.
  • the low temperature side heater core 36 exchanges heat between the refrigerant flowing out of the refrigerant passage 12a of the water-refrigerant heat exchanger 12 and the supply air flowing into the ventilation heat exchanger 34.
  • the hot water outlet side of the high temperature side heater core 35 is connected to the suction side of the second water circulation pump 39.
  • Other configurations are the same as those of the first embodiment.
  • the supply air flowing into the ventilation heat exchanger 34 is heated by the refrigerant flowing out from the refrigerant passage 12a of the water-refrigerant heat exchanger 12 in the low temperature side heater core 36. That is, in the low temperature side heater core 36, the temperature of the refrigerant flowing out of the refrigerant passage 12 a of the water-refrigerant heat exchanger 12 and flowing into the electric expansion valve 13 is lowered, and the supply air flowing into the ventilation heat exchanger 34 is supplied. Heat.
  • the heating system 1 of the second embodiment similarly to the first embodiment, the supply air taken into the heating target space from the outside is sufficiently heated without causing a decrease in the COP of the heat pump cycle 10. be able to.
  • the refrigerant of the heat pump cycle 10 and the supply air are directly heat-exchanged by the low-temperature side heater core 36, and therefore, via a heat medium such as hot water or hot water.
  • a heat medium such as hot water or hot water.
  • the solar panel 40 is disposed on the roof of a residential house and the like, and heats hot water using solar heat as a heat source.
  • warm water can be heated up to about 40 ° C. to 50 ° C. in fine weather.
  • the solar panel 40 is connected in parallel to the hot water passage 38 disposed in the hot water storage tank 20 in the second water circulation circuit 37.
  • Other configurations are the same as those of the first embodiment.
  • the heating system 1 when the heating system 1 is operated, the supply air taken into the heating target space from the outside can be sufficiently heated without causing a decrease in the COP of the heat pump cycle 10 as in the first embodiment.
  • the heating system 1 includes the solar panel 40
  • the operation of the heat pump cycle 10 is performed by raising the temperature of the hot water flowing into the high temperature side heater core 35 to the reference temperature or higher in the solar panel 40. Can be stopped. Thereby, the energy consumed for indoor heating can be reduced.
  • 4th Embodiment demonstrates the example which connected the 1st water circulation circuit 21 and the 2nd water circulation circuit 37 with respect to 1st Embodiment, as shown to the typical whole block diagram of FIG. Accordingly, in the second water circulation circuit 37, the same hot water as in the first water circulation circuit 21 circulates.
  • the outlet side of the water passage 12b of the water-refrigerant heat exchanger 12 of the first water circulation circuit 21 (the hot water inlet side of the hot water storage tank 20) and the outlet side of the hot water passage 38 of the second water circulation circuit 37 (high temperature).
  • the hot water outlet side of the low temperature side heater core 36 of the second water circulation circuit 37 (the suction side of the second water circulation pump 39) and the hot water supply inlet side of the hot water storage tank 20 of the first water circulation circuit 21 (the suction side of the first water circulation pump 22). ) Is connected.
  • the hot water flowing out of the water passage 12 b of the water-refrigerant heat exchanger 12 out of the hot water circulating in the first water circulation circuit 21 only flows into the upper side of the hot water storage tank 20. Instead, it joins the hot water flowing out of the hot water passage 38 of the second water circulation circuit 37 and flows into the high temperature side heater core 35.
  • the hot water flowing out from the low temperature side heater core 36 is not only drawn into the second water circulation pump 39 but also below the hot water storage tank 20 of the first water circulation circuit 21.
  • the hot water flowing out from the hot water outlet on the side joins and is sucked into the first water circulation pump 22.
  • Other configurations are the same as those of the first embodiment.
  • the heating system 1 is configured as in the fourth embodiment, the supply air taken into the heating target space from the outside is sufficiently heated without causing a decrease in the COP of the heat pump cycle 10 as in the first embodiment. can do.
  • the high-temperature side heater core 35 can directly heat the supply air flowing out from the ventilation heat exchanger 34 by using a heat medium (hot water) heated by the refrigerant discharged from the compressor 11. Therefore, even if the temperature of the hot water in the hot water storage tank 20 is low, it is possible to sufficiently heat the air supplied from the outside to the space to be heated.
  • a heat medium hot water
  • the heater 41 heats the object to be heated using the hot water flowing out from the high temperature side heater core 35 as a heat source, and the hot water whose temperature has been lowered by heating the object to be heated is supplied to the hot water inlet of the low temperature side heater core 36. To the side.
  • a heater 41 that requires a heat source in a temperature range lower than that of the high temperature side heater core 35 and higher than that of the low temperature side heater core 36.
  • a panel heater, towel warmer, or the like that requires a heat source in a temperature range of about 20 ° C. to 40 ° C. can be used as such a heater 41.
  • a panel heater is a heater that heats a room by arranging a hot water passage extending in a meandering manner in a wall and circulating the hot water through the hot water passage.
  • a towel warmer is a hot water passage that extends in a serpentine shape in a washroom, etc., and by circulating warm water through this hot water passage, towels and small laundry that are hung in the hot water passage are heated and dried. is there.
  • the heating system 1 according to the fifth embodiment when operated, the supply air taken into the heating target space from the outside is sufficiently heated without causing a decrease in the COP of the heat pump cycle 10 as in the first embodiment. be able to. Furthermore, the heater 41 can effectively use the heat of the hot water.
  • a heat medium circulation circuit 50 In the sixth embodiment, an example in which a heat medium circulation circuit 50 is added to the first embodiment as shown in FIG. 6 will be described.
  • the heat medium circulation circuit 50 circulates second warm water (for example, ethylene glycol aqueous solution). Further, in the heat medium circulation circuit 50, a third water circulation pump 51, a water passage 12b of the water-refrigerant heat exchanger 12, and a first water passage 52a of the water-water heat exchanger 52 are arranged.
  • the second hot water that circulates in the heat medium circulation circuit 50 is a heat medium that moves the heat generated in the heat pump cycle 10 to the hot water that circulates in the first water circulation circuit 21.
  • the third water circulation pump 51 is a water pumping unit that pumps a heating heat medium to the inlet side of the water passage 12b of the water-refrigerant heat exchanger 12, and the basic configuration thereof is the first configuration of the first embodiment.
  • the second water circulation pumps 22 and 39 are the same. Therefore, the operation (rotation speed) of the third water circulation pump 51 is controlled by the control signal output from the control device.
  • the water-water heat exchanger 52 is pumped from the first water passage 52 a for circulating the second hot water flowing out from the water passage 12 b of the water-refrigerant heat exchanger 12 and the first water circulation pump 22 of the first water circulation circuit 21. And a second water passage 52b through which hot water is circulated.
  • the water-water heat exchanger 52 exchanges heat between the second hot water flowing through the first water passage 52a and the hot water supplied through the second water passage 52b.
  • the basic configuration of the water-water heat exchanger 52 is the same as that of the water-refrigerant heat exchanger 12.
  • the heating medium for heating is the discharge port of the third water circulation pump 51 ⁇ the water passage 12 b of the water-refrigerant heat exchanger 12 ⁇ the first of the water-water heat exchanger 52. It circulates in order of the water passage 52a ⁇ the inlet of the third water circulation pump 51.
  • Other configurations are the same as those of the first embodiment.
  • control device determines a control voltage to be output to the third water circulation pump 51 so that the third water circulation pump 51 can exhibit a predetermined water pumping ability.
  • the high-temperature and high-pressure refrigerant discharged from the compressor 11 flows into the refrigerant passage 12a of the water-refrigerant heat exchanger 12 and flows through the water passage 12b. 2 It dissipates heat to warm water and is cooled. Thereby, the 2nd warm water which distribute
  • the subsequent operation of the heat pump cycle 10 is the same as in the first embodiment.
  • the second hot water heated in the water passage 12b of the water-refrigerant heat exchanger 12 flows into the first water passage 52a of the water-water heat exchanger 52, and the water-water heat Heat is dissipated to the hot water flowing through the second water passage 52b of the exchanger 52. Thereby, the hot water supplied through the second water passage 52b is heated.
  • the subsequent operations in the first and second water circulation circuits 21 and 37 and the supply air heating unit 30 are the same as those in the first embodiment.
  • the second hot water circulating in the heat medium circulation circuit 50 is heated by the high-temperature and high-pressure refrigerant discharged from the compressor 11 of the heat pump cycle 10, and the second heated water is used to heat the second hot water.
  • the hot water circulating through the water circulation circuit 21 is heated, and the hot water is heated by the heated hot water.
  • the hot water (heat medium) indirectly heated via the second hot water and hot water by the high temperature and high pressure refrigerant discharged from the compressor 11 of the heat pump cycle 10 is used as a heat source.
  • the supply air flowing out from the exchanger 34 is heated.
  • the temperature of the hot water is lowered by heating the supply air with the low temperature side heater core 36, the temperature of the hot water on the lower side in the hot water storage tank 20 is lowered by the hot water having the lowered temperature, The temperature of the second hot water is lowered by the hot water supply on the lower side in the hot water storage tank 20 whose temperature has dropped.
  • the temperature of the hot water (heat medium) that indirectly exchanges heat with the refrigerant flowing into the electric expansion valve 13 via the hot water and the second hot water is lowered, and the ventilation heat exchanger The supply air flowing into 34 is heated.
  • the heating system 1 of the sixth embodiment as in the first embodiment, it is possible to sufficiently heat the supply air that is taken into the heating target space from the outside without causing a decrease in the COP of the heat pump cycle 10. it can.
  • the heating system 1 is configured to indirectly exchange heat between the refrigerant of the heat pump cycle 10 and the hot water via the second hot water of the heat medium circulation circuit 50, the refrigerant leaks into the hot water. This can be prevented. Therefore, the safety when using hot water as drinking water can be improved. (Other embodiments)
  • the present disclosure is not limited to the above-described embodiment, and can be variously modified as follows without departing from the spirit of the present disclosure.
  • the refrigerant that has flowed out of the refrigerant passage 12a of the water-refrigerant heat exchanger 12 may flow into the high temperature side heater core 35, and the refrigerant that has flowed out of the high temperature side heater core 35 may flow into the low temperature side heater core 36. .
  • the high-temperature side heater core 35 can heat the supply air flowing out from the ventilation heat exchanger 34 using the refrigerant discharged from the compressor 11 as a heat source, and the low-temperature side heater core 36 flows into the electric expansion valve 13.
  • the supply air flowing into the ventilation heat exchanger 34 can be heated by lowering the temperature of the refrigerant.
  • ventilation heat exchange is performed in contrast to the case where heat exchange is performed between the refrigerant and the supply air via a heat medium such as hot water or hot water.
  • the supply air flowing out from the vessel 34 can be efficiently heated.
  • Some heating systems 1 including the heat pump cycle 10 perform a defrosting operation to defrost the evaporator 14 when frost is formed.
  • a defrosting operation for example, there is a method of configuring a so-called hot gas cycle in which the throttle opening degree of the electric expansion valve 13 is fully opened and the refrigerant discharged from the compressor 11 flows into the evaporator 14. Conceivable.
  • the high temperature side heater core 35 it is desirable to heat the supply air flowing out from the ventilation heat exchanger 34 using hot water stored in the hot water storage tank 20 as a heat source as described in the above embodiment.
  • the heat pump cycle 10 is performing a defrosting operation or when the heat pump cycle 10 is stopped. Even so, by sufficiently raising the temperature of the hot water stored in the hot water storage tank 20, the high-temperature heater core 35 continuously heats the supply air flowing out of the ventilation heat exchanger 34. Can do.
  • the evaporator 14 is configured to exchange heat between the refrigerant and the exhaust gas flowing out from the ventilation heat exchanger 34.
  • the evaporator 14 heats the refrigerant and the outside air.
  • a configuration for replacement may be employed. Thereby, the duct which guides exhaust_gas
  • the exhaust air blowing fan 32 a is disposed on the most upstream side of the exhaust air flow path 32, and the air supply fan 33 a is disposed on the most upstream side of the air supply air flow path 33.
  • positioning of the exhaust ventilation fan 32a and the supply ventilation fan 33a is not limited to this.
  • the exhaust air blowing fan 32 a may be arranged on the most upstream side of the exhaust air flow path 32, and the air supply fan 33 a may be arranged on the most downstream side of the air supply air flow of the air supply ventilation path 33.
  • two ventilation fans can be arrange
  • each above-mentioned embodiment it is constituted by laminating and arranging a plurality of metal plates excellent in heat transfer as ventilation heat exchanger 34, and as a sensible heat exchanger which exchanges heat between exhaust and air supply
  • the configured one was adopted.

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PCT/JP2014/000070 2013-01-23 2014-01-10 暖房システム WO2014115496A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112014000525.8T DE112014000525T5 (de) 2013-01-23 2014-01-10 Heizsystem

Applications Claiming Priority (2)

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WO2018199835A1 (en) * 2017-04-28 2018-11-01 Fläktgroup Sweden Ab Air handling system with partially indirect heat pump and method to reduce the drop of the supply air temperature in defrost mode
CN110848846A (zh) * 2019-11-19 2020-02-28 珠海格力电器股份有限公司 一种太阳能空调热泵系统、控制方法和空调器

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US20210033302A1 (en) * 2018-02-22 2021-02-04 Mitsubishi Electric Corporation Air-conditioning apparatus and air handling unit
JPWO2022244182A1 (de) * 2021-05-20 2022-11-24
WO2023119590A1 (ja) * 2021-12-23 2023-06-29 三菱電機株式会社 ヒートポンプ装置

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WO2018199835A1 (en) * 2017-04-28 2018-11-01 Fläktgroup Sweden Ab Air handling system with partially indirect heat pump and method to reduce the drop of the supply air temperature in defrost mode
EP3615868A4 (de) * 2017-04-28 2020-12-30 FläktGroup Sweden AB Luftbehandlungssystem mit teilweise indirekter wärmepumpe und verfahren zur verringerung des abfalls der versorgungslufttemperatur im abtaumodus
CN110848846A (zh) * 2019-11-19 2020-02-28 珠海格力电器股份有限公司 一种太阳能空调热泵系统、控制方法和空调器
CN110848846B (zh) * 2019-11-19 2023-12-08 珠海格力电器股份有限公司 一种太阳能空调热泵系统、控制方法和空调器

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