WO2014174792A1 - Système de pompe à chaleur - Google Patents

Système de pompe à chaleur Download PDF

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Publication number
WO2014174792A1
WO2014174792A1 PCT/JP2014/002116 JP2014002116W WO2014174792A1 WO 2014174792 A1 WO2014174792 A1 WO 2014174792A1 JP 2014002116 W JP2014002116 W JP 2014002116W WO 2014174792 A1 WO2014174792 A1 WO 2014174792A1
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WIPO (PCT)
Prior art keywords
refrigerant
temperature
fluid
heat exchanger
compressor
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.)
Ceased
Application number
PCT/JP2014/002116
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English (en)
Japanese (ja)
Inventor
竹内　清
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Denso Corp
Original Assignee
Denso Corp
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Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to DE112014002083.4T priority Critical patent/DE112014002083T5/de
Publication of WO2014174792A1 publication Critical patent/WO2014174792A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/001—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems in which the air treatment in the central station takes place by means of a heat-pump or by means of a reversible cycle
    • 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
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using 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
    • F24H15/136—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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
    • 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
    • F24H15/227—Temperature of the refrigerant in heat pump cycles
    • 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
    • F24H15/335—Control of pumps, e.g. on-off control
    • 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
    • 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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • 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
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • 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
    • F25B2400/00—Component parts or details not otherwise provided for in this subclass
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0411—Refrigeration circuit bypassing means for expansion valves or capillary tubes
    • 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
    • F25B2400/00—Component parts or details not otherwise provided for in this subclass
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0417—Refrigeration circuit bypassing means for subcoolers
    • 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
    • F25B2600/13—Pump speed control
    • 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
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21161—Temperatures of a condenser of the fluid heated by the condenser
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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]
    • Y02B30/12—Hot water 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]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • This disclosure relates to a heat pump system using a refrigeration cycle.
  • the high-temperature and high-pressure refrigerant discharged from the compressor flows through the heat exchanger (heat radiator), and the heat exchanger (evaporator) uses the outside air as a heat source via the electronic expansion valve. ) And return to the compressor.
  • the heat exchanger heat radiator
  • the heat exchanger evaporator
  • the water in the tank is supplied from the water supply pump, and the water and the refrigerant exchange heat.
  • Patent Document 1 in order to increase the refrigerant temperature reaching the evaporator inlet, it is necessary to increase the discharge pressure during the defrosting operation, and the power consumption or power consumption of the compressor during the defrosting operation is high. Get higher. Therefore, a heat pump system that can save power consumption or power consumption of the compressor during the defrosting operation and quickly terminate the defrosting operation is desired.
  • This disclosure is intended to provide a heat pump system that performs highly efficient defrosting by performing defrosting operation in a short time while suppressing power consumption or power consumption during defrosting operation.
  • the heat pump system includes a compressor that compresses the refrigerant, a heat exchanger that performs heat exchange between the refrigerant compressed by the compressor and the fluid, and a heating fluid that includes a fluid heated by the heat exchanger.
  • a heating device a fluid circulation device that circulates the heating fluid so as to pass through the heating device and the heat exchanger, a control valve that controls a flow of the refrigerant that has passed through the heat exchanger, and a refrigerant that has passed through the control valve flows.
  • An evaporator that absorbs heat from outside air, and a control device that controls the fluid circulation device and the control valve are provided.
  • the control device makes the opening degree of the control valve larger than that during the non-defrosting operation, and operates the fluid circulation device to flow the fluid to the heat exchanger.
  • the control device increases the opening degree of the control valve and operates the fluid circulation device to flow the fluid to the heat exchanger. Therefore, the heat which a heating apparatus holds with a heat exchanger can be supplied to a refrigerant
  • the heat pump system further includes an internal heat exchanger.
  • the internal heat exchanger is a high pressure side heat exchange section provided between the heat exchanger and the expansion valve, a low pressure side heat exchange section provided between the evaporator and the compressor, and exchanges heat with the high pressure side heat exchange section. It consists of.
  • a control valve for defrosting is provided between the refrigerant outflow side of the heat exchanger and the refrigerant inflow side of the evaporator.
  • the efficiency of the refrigeration cycle can be improved by the internal heat exchanger, the temperature of the fluid heated by the heat exchanger can be increased efficiently, and the increased temperature can be used to shorten the temperature.
  • Defrosting can be efficiently performed in time. Further, at the time of defrosting, it is possible to defrost in a short time while bypassing the internal heat exchanger and preventing the refrigerant from flowing through the control valve and taking heat away from the internal heat exchanger.
  • the heat pump system further includes a fluid temperature detection unit that detects the temperature of the heated fluid, and a refrigerant temperature detection unit that detects the temperature of the refrigerant compressed by the compressor.
  • the control device determines whether or not a value obtained by subtracting a predetermined temperature from the temperature of the refrigerant detected by the refrigerant temperature detection unit is higher than the temperature of the heated fluid detected by the fluid temperature detection unit. And when it is high, the rotation speed of the compressor is reduced by a predetermined amount from the rotation speed of the compressor at the start of the defrosting operation.
  • the rotation speed of the compressor is decreased by a predetermined amount.
  • the refrigerant can sufficiently absorb heat from the fluid.
  • the heat pump system further includes a fluid temperature detection unit that detects the temperature of the heated fluid, and a refrigerant temperature detection unit that detects the temperature of the refrigerant compressed by the compressor.
  • the control device determines whether or not a value obtained by subtracting a predetermined temperature from the temperature of the refrigerant detected by the refrigerant temperature detection unit is higher than the temperature of the heated fluid detected by the fluid temperature detection unit. And when it is high, the opening degree of the control valve is made a predetermined amount larger than the opening degree of the control valve at the start of the defrosting operation.
  • the opening degree of the control valve is increased by a predetermined amount when the temperature obtained by subtracting the predetermined temperature from the refrigerant temperature is higher than the temperature of the fluid detected by the fluid temperature detecting unit, the high pressure side of the compressor The pressure can be reduced to reduce the power or power of the compressor. Further, the temperature of the discharged refrigerant, which is the temperature on the discharge side of the compressor, is lowered so that the refrigerant can sufficiently absorb heat from the feed water through the heat exchanger.
  • a compressor 1 is composed of an electric compressor in which a compressor is driven by an electric motor to compress refrigerant.
  • the refrigerant is carbon dioxide, but other refrigerants can also be used.
  • the water-refrigerant heat exchanger 2 performs heat exchange between the refrigerant compressed by the compressor 1 and an antifreeze liquid (hereinafter, also simply referred to as water, hot water, or water supply) that is a fluid flowing inside.
  • an antifreeze liquid hereinafter, also simply referred to as water, hot water, or water supply
  • a warm water pipe 3 through which water heated by the water refrigerant heat exchanger 2 flows, a floor heating panel 4, and a circulation pump 5 that circulates water so as to pass through the water refrigerant heat exchanger 2 are a floor heating device 6. Is provided.
  • a control valve 9 is provided between the water-refrigerant heat exchanger 2 and the evaporator 7. The opening degree of the control valve 9 is controlled by a control signal from the control device 10.
  • the compressor 1, the water refrigerant heat exchanger 2, the control valve 9, and the evaporator 7 constitute a refrigeration cycle apparatus 50 that pumps heat from the outside air.
  • the refrigeration cycle apparatus 50 is integrated with the floor heating apparatus 6.
  • the control device 10 controls at least the circulation pump 5 and the control valve 9. And the control apparatus 10 makes the opening degree of the control valve 9 larger than the time of normal operation according to the start of the defrosting operation of the evaporator 7, and when the circulation pump 5 is stopped, the circulation pump 5 Rotate.
  • the high-temperature and high-pressure refrigerant compressed by the compressor 1 warms the water in the floor heating device 6 through the water-refrigerant heat exchanger 2 (for example, 35 ° C.). Accordingly, the floor in the house is heated by heat radiation from the floor heating panel 4 laid under the floor. During this time, water circulates between the water-refrigerant heat exchanger 2 and the floor heating panel 4 by the circulation pump 5.
  • control valve 9 functions as an expansion valve disposed on the refrigerant inflow side of the evaporator 7. For this reason, the refrigerant evaporates in the evaporator 7 and the evaporator 7 absorbs heat from the outside air. The refrigerant that has absorbed heat is sucked into the compressor 1 and pressurized. Thus, in the process in which the water of the floor heating apparatus 6 is heated, frost adheres to the evaporator 7 and the need for defrosting arises. When the need for defrosting occurs, the water in the floor heating device 6 is sufficiently heated.
  • the defrosting operation is started at a known timing such as when frosting of the evaporator 7 is detected.
  • the defrosting operation is started when the difference between the outside air temperature and the refrigerant temperature downstream of the evaporator 7 exceeds a predetermined temperature TA.
  • the defrosting operation is terminated when the refrigerant temperature downstream of the evaporator 7 becomes equal to or higher than the predetermined temperature TB.
  • the circulation pump 5 is controlled to continue to rotate.
  • the compressor 1 is controlled so as to continue to operate. Thereby, the water (warm water) in the floor heating device 6 is circulated between the floor heating panel 4 and the water refrigerant heat exchanger 2.
  • the opening degree of the control valve 9 is larger by a predetermined amount than in the normal operation during non-defrosting, for example, fully opened.
  • the refrigerant heated by the compressor 1 and further heated by the hot water in the floor heating device 6 passes through the control valve 9 having an increased opening and flows into the evaporator 7 to heat the evaporator 7.
  • the defrosting operation is performed.
  • the liquid flowing in the water refrigerant heat exchanger 2 is not limited to water or antifreeze. Therefore, the water refrigerant heat exchanger 2 is also referred to as a liquid refrigerant heat exchanger.
  • a water temperature detection sensor 11 that detects the temperature of water heated by the water refrigerant heat exchanger 2 is provided.
  • the control device 10 monitors a signal from a water temperature detection sensor 11 that detects the temperature of water (water supply) between the water refrigerant heat exchanger 2 and the circulation pump 5.
  • a refrigerant discharge temperature sensor 12 that detects the temperature of the refrigerant compressed by the compressor 1 is provided on the discharge side of the compressor 1.
  • the control device 10 monitors the refrigerant discharge temperature from the refrigerant discharge temperature sensor 12.
  • the control device 10 rotates the compressor 1. Decrease the number by a predetermined amount.
  • FIG. 2 shows control of the heat pump system 100 of the first embodiment.
  • the control of FIG. 2 is repeatedly executed by the control device 10 at predetermined intervals.
  • the control starts in S21 of FIG. 2, in S22, the relationship between the water temperature detected by the water temperature detection sensor 11 and the refrigerant discharge temperature is determined.
  • the process proceeds to S23.
  • the rotation speed of the compressor 1 is reduced by a predetermined amount, the discharge temperature is lowered, and the refrigerant can absorb heat from the hot water via the water / refrigerant heat exchanger 2. As a result, the power or power consumed by the compressor 1 can be saved.
  • FIG. 3 is used to compare the defrosting in the first embodiment with the conventional defrosting (comparative example) and explain the effect of shortening the defrosting operation time.
  • the vertical axis represents the defrosting time ratio
  • the defrosting time ratio in the conventional defrosting control is 1.
  • the defrosting time ratio is about 0.3, and the time can be reduced by about 70%.
  • the defrosting operation can be performed in a short time and with high efficiency by warming the refrigerant with warm water boiled using outside air heat during normal operation.
  • FIG. 4 is a Mollier diagram during the defrosting operation.
  • the vertical axis represents pressure (p), and the horizontal axis represents specific enthalpy (h).
  • the increase in the refrigerant pressure by the compressor is indicated between a ⁇ b.
  • the specific enthalpy of the refrigerant is increased due to the refrigerant being heated by the water-refrigerant heat exchanger (the refrigerant absorbs heat from the hot water).
  • the decompression of the refrigerant by the control valve 9 is shown.
  • d ⁇ a the specific enthalpy is reduced by heating the evaporator to defrost.
  • the defrosting operation is performed only with the energy of the compressor 1.
  • FIG. 4 the Mollier diagram at the time of the defrost operation of a comparative example is partially shown with the broken line.
  • the increase in the refrigerant pressure by the compressor 1 is shown between a and bb.
  • bb and db shows the decompression of the refrigerant when the refrigerant on the high-pressure side of the compressor 1 is led to the evaporator 7 through the solenoid valve and the capillary.
  • db ⁇ a the specific enthalpy is reduced by heating the evaporator to defrost.
  • the defrosting capability of the comparative example corresponds to the length between a and db, and the defrosting capability of the above embodiment corresponds to the length between a and d, and the defrosting capability is improved.
  • ⁇ corresponds to the amount of heat absorbed by the refrigerant from the hot water.
  • various heating devices using hot water can be adopted.
  • the heat capacity of the heating device itself terminal device itself
  • the heat capacity of the hot water in the hose and hot water piping up to the heating device itself can be utilized.
  • the compression pressure of the compressor 1 can be reduced (power consumption can be reduced) by intentionally reducing the discharge pressure. Further, the discharge pressure decreases, the density of the refrigerant in the water-refrigerant heat exchanger 2 is reduced, the amount of refrigerant flowing into the evaporator 7 is increased correspondingly, and the effect of further shortening the defrosting operation time is also accompanied. Will occur.
  • the water refrigerant heat exchanger 2 in FIG. 1 constitutes a fluid refrigerant heat exchanger
  • the floor heating device 6 constitutes a heating device
  • the circulation pump 5 constitutes a fluid circulation device
  • control is performed.
  • the opening degree of the valve 9 can be adjusted by the control device 10 from fully closed to fully open.
  • the water refrigerant heat exchanger 2 corresponds to a fluid refrigerant heat exchanger, and is also referred to as a fluid refrigerant heat exchanger 2 hereinafter.
  • the floor heating device 6 corresponds to the heating device 6 and is also referred to as a heating device 6 hereinafter.
  • the circulation pump 5 corresponds to a fluid circulation device and is also referred to as a fluid circulation device 5 hereinafter.
  • the heat pump system 100 includes a refrigeration system device 50 and a floor heating device 6, and includes a compressor 1 that compresses a refrigerant, and a fluid refrigerant heat exchanger 2 that performs heat exchange between the refrigerant compressed by the compressor 1 and a fluid.
  • a fluid circulation device 5 that circulates the fluid through the fluid refrigerant heat exchanger 2 is provided in the heating device 6 through which the fluid heated by the fluid refrigerant heat exchanger 2 flows. Furthermore, a control valve 9 that controls the flow of the refrigerant that has passed through the fluid refrigerant heat exchanger 2, an evaporator 7 in which the refrigerant that has passed through the control valve 9 flows and absorbs heat from the outside air, and at least the fluid circulation device 5 and the control valve 9 Is provided.
  • the control device 10 increases the degree of opening of the control valve 9 during the defrosting operation of the evaporator 7 than during the non-defrosting operation, and operates the fluid circulation device 5 to flow the fluid to the fluid refrigerant heat exchanger 2. .
  • the control device 10 increases the opening degree of the control valve 9 and operates the fluid circulation device 5 to flow the fluid to the fluid refrigerant heat exchanger 2 during the defrosting operation of the evaporator 7. Therefore, the heat which the heating apparatus 6 with which the fluid heated with the fluid refrigerant
  • the fluid refrigerant heat exchanger 2 includes a liquid refrigerant heat exchanger 2 that performs heat exchange between the refrigerant compressed by the compressor 1 and the liquid, and the heating device 6 is heated by the liquid refrigerant heat exchanger 2. It consists of a floor heating device that is a hot water device 6 that dissipates heat.
  • the fluid circulation device 5 includes a pump 5 that circulates liquid through the hot water device 6 and the liquid refrigerant heat exchanger 2.
  • the control device 10 increases the opening degree of the control valve 9 and rotates the pump 5 when the evaporator 7 is defrosted. Therefore, the heat which the liquid which flows into the hot water apparatus 6 which radiates the liquid heated with the liquid refrigerant heat exchanger 2 can be supplied to a refrigerant
  • the water temperature detection sensor 11 constitutes a fluid temperature detection unit
  • the refrigerant discharge temperature sensor 12 constitutes a refrigerant temperature detection unit.
  • the heat pump system 100 includes a fluid temperature detection unit 11 that detects the temperature of the fluid heated by the fluid refrigerant heat exchanger 2 and a refrigerant temperature detection unit 12 that detects the temperature of the refrigerant compressed by the compressor 1. Then, the following control is performed.
  • the rotational speed of the compressor 1 is decreased by a predetermined amount. Electric power or power can be reduced, and the refrigerant can sufficiently absorb heat from the fluid.
  • the heat pump system showing the second embodiment will be described with reference to FIG.
  • the control shown in FIG. 2 is executed.
  • the compressor 1 compresses the refrigerant.
  • the water-refrigerant heat exchanger 2 performs heat exchange between the refrigerant compressed by the compressor 1 and an antifreeze liquid (hereinafter, also simply referred to as water, hot water, or water supply) that is a fluid flowing inside.
  • a circulation pump 5 that circulates the feed water so as to pass through the water-refrigerant heat exchanger 2 is provided in the floor heating panel 4 and the hot water pipe 3 through which water flows.
  • a high-pressure side heat exchanger 15a and an electronic expansion valve 16 are connected between the water-refrigerant heat exchanger 2 and the evaporator 7, a high-pressure side heat exchanger 15a and an electronic expansion valve 16 are connected.
  • the electronic expansion valve 16 is controlled in its open / closed state by a control signal from the control device 10 and is also simply referred to as an expansion valve.
  • the defrosting electromagnetic valve 9 constituting the control valve 9 is closed during normal time (when not defrosting) and is open during defrosting. Therefore, at normal times, the refrigerant flows through the high-pressure side heat exchanging portion 15 a and the expansion valve 16 to the evaporator 7.
  • the refrigerant that has taken the heat of vaporization from the outside air in the evaporator 7 is guided to the suction side of the compressor 1 through the other low-pressure side heat exchange section 15b.
  • the refrigerant absorbs heat from the outside air and heats the water supplied to the floor heating panel 4 via the water / refrigerant heat exchanger 2.
  • the high-pressure side heat exchanging part 15a and the low-pressure side heat exchanging part 15b are coupled so as to be able to transfer heat, and constitute an internal heat exchanger 15 as a whole.
  • the defrosting solenoid valve 9 is controlled to be opened or closed by a control signal from the control device 10.
  • the control device 10 controls at least the circulation pump 5 and the control valve 9. And the control apparatus 10 opens the control valve 9 according to the start of the defrost operation of the evaporator 7, closes the expansion valve 16, and rotates it when the circulation pump 5 has stopped.
  • the high-temperature and high-pressure refrigerant compressed by the compressor 1 heats the water in the floor heating device 6 through the water-refrigerant heat exchanger 2.
  • the floor in the house is heated by heat radiation from the floor heating panel 4 laid under the floor.
  • water circulates between the water-refrigerant heat exchanger 2 and the floor heating panel 4 by the circulation pump 5.
  • the water in the floor heating device 6 is sufficiently heated.
  • the defrosting operation is started at a known timing such as when frosting of the evaporator 7 is detected.
  • the circulation pump 5 continues to rotate, and the water (warm water) in the floor heating device 6 circulates between the floor heating panel 4 and the water refrigerant heat exchanger 2.
  • the defrosting electromagnetic valve 9 is opened.
  • the refrigerant heated by the compressor 1 and further heated by the water in the floor heating device 6 flows through the pipe 8 and bypasses the opened defrosting electromagnetic valve 9 side to the evaporator 7.
  • the defrosting of the evaporator 7 is performed.
  • coolant temperature fall in the internal heat exchanger 15 can be prevented, and a defrosting efficiency improves.
  • the defrosting solenoid valve 9 is opened from the closed state, and the expansion valve 16 is closed from the opened state, so that the refrigerant flows through the bypass passage 80.
  • the aperture of the defrosting electromagnetic valve 9 is large, the discharge refrigerant pressure can be lowered, and the density of the refrigerant in the water refrigerant heat exchanger 2 is lowered. Therefore, the amount of refrigerant held by the water refrigerant heat exchanger 2 decreases, and instead, the amount of refrigerant flowing through the evaporator 7 increases.
  • the refrigerant outflow side of the water refrigerant heat exchanger 2 and the refrigerant inflow side of the evaporator 7 are connected by the high-pressure side heat exchanging portion 15a and the expansion valve 16. Moreover, the refrigerant
  • An internal heat exchanger 15 is configured by coupling the high-pressure side heat exchange unit 15a and the low-pressure side heat exchange unit 15b so as to transfer heat to each other. The internal heat exchanger 15 improves the efficiency of the refrigeration cycle during normal operation.
  • the control shown in FIG. 2 can be adopted as the control.
  • the refrigerant outflow side of the fluid refrigerant heat exchanger 2 and the refrigerant inflow side of the evaporator 7 are connected by the high-pressure side heat exchange unit 15 a and the expansion valve 16. Then, the refrigerant outflow side of the evaporator 7 and the compressor 1 are connected by a low-pressure side heat exchange section 15b. And the high-pressure side heat exchange part 15a and the low-pressure side heat exchange part 15b are couple
  • the efficiency of the refrigeration cycle can be improved by the internal heat exchanger 15, the temperature of the fluid heated by the fluid refrigerant heat exchanger 2 can be increased efficiently, and the increased heat can be reduced. It can be used for efficient defrosting in a short time. Further, at the time of defrosting, the internal heat exchanger 15 is bypassed, the refrigerant flows through the control valve 9, and it is possible to defrost in a short time while preventing the internal heat exchanger 15 from taking heat away.
  • FIG. 1 A third embodiment will be described. A different part from embodiment mentioned above is demonstrated. Control of the heat pump system according to the third embodiment will be described with reference to FIG. Although FIG. 1 or FIG. 5 can be used for the entire configuration diagram, FIG. 1 is used in this third embodiment.
  • the control of FIG. 6 is repeatedly executed at a predetermined interval during the defrosting operation in which the control valve 9 is open.
  • the control starts in S61, the relationship between the water supply temperature detected by the water temperature detection sensor 11 (FIG. 1) and the refrigerant discharge temperature detected by the refrigerant discharge temperature sensor 12 is determined in S62. If the temperature obtained by subtracting the predetermined temperature ⁇ from the refrigerant discharge temperature is not smaller than the feed water temperature, the process proceeds to S63.
  • the opening degree of the control valve 9 in FIG. 1 is further increased by a predetermined amount.
  • the discharge temperature (discharge pressure) which is the temperature on the discharge side of the compressor 1 is lowered, and the refrigerant can absorb heat from the feed water via the water / refrigerant heat exchanger 2.
  • the fluid temperature detector 11 that detects the temperature of the fluid heated by the fluid refrigerant heat exchanger 2 and the refrigerant temperature detector 12 that detects the temperature of the refrigerant compressed by the compressor 1. And have. Then, it is determined whether or not a temperature obtained by subtracting a predetermined temperature from the temperature of the refrigerant detected by the refrigerant temperature detection unit 12 is higher than the temperature of the fluid detected by the fluid temperature detection unit 11. And when high, the control apparatus 10 is performing control which makes the opening degree of the control valve 9 predetermined amount larger than the time of a defrost operation start.
  • the opening degree of the control valve 9 is increased by a predetermined amount when the temperature obtained by subtracting the predetermined temperature from the refrigerant temperature is higher than the temperature of the fluid detected by the fluid temperature detection unit 11, the compressor 1 The pressure on the high pressure side is reduced, and the power or power of the compressor 1 can be reduced. Further, the discharge temperature, which is the temperature on the discharge side of the compressor 1, is lowered so that the refrigerant can sufficiently absorb heat from the water supply via the water / refrigerant heat exchanger 2.
  • the fourth embodiment is a combination of the overall configuration of FIG. 5 and the control of FIG.
  • the defrosting control valve 9 in FIG. 5 a valve whose opening degree can be controlled in a plurality of stages is adopted.
  • a fourth embodiment will be described with reference to FIGS. 5 and 6.
  • the control valve 9 in FIG. 5 is closed during normal operation and opened during defrosting.
  • the control in FIG. 6 is repeatedly executed at a predetermined interval during the defrosting operation.
  • the control starts in S61, the relationship between the feed water temperature detected by the feed water temperature detection sensor 11 and the refrigerant discharge temperature detected by the refrigerant discharge temperature sensor 12 is determined in S62. If the temperature obtained by subtracting the predetermined temperature ⁇ from the refrigerant discharge temperature is not smaller than the feed water temperature, the process proceeds to S63.
  • the opening degree of the defrosting electromagnetic valve 5 in FIG. 5 is further increased by a predetermined amount. As a result, the pressure on the high pressure side of the compressor 1 decreases, and the power or power consumed by the compressor 1 can be saved. If the feed water temperature is higher than the temperature obtained by subtracting the predetermined temperature ⁇ from the refrigerant discharge temperature in S62, the control is terminated in S64. The control in FIG. 6 is repeated at predetermined time intervals during the defrosting operation period.
  • the fourth embodiment combines the overall configuration of FIG. 5 and the control of FIG. That is, in the heat pump system 100 having the refrigeration cycle apparatus 50 having the internal heat exchanger 15 and the floor heating apparatus 6, the opening degree of the control valve 9 during the defrosting operation is controlled as shown in FIG.
  • the temperature of the warm water of the floor heating device 6 is efficiently increased by the internal heat exchanger 15, and the opening of the control valve 9 is controlled so that the refrigerant efficiently absorbs heat from the warm water during the defrosting operation.
  • the high pressure on the discharge side of 1 is reduced.
  • the power or power for driving the compressor 1 can be reduced, and defrosting that ends in a short time is efficiently performed.
  • the heating device 6 includes an indoor heating device 6 that warms the temperature of the air flowing through the room (including the interior).
  • the indoor heating device of the present disclosure includes an internal heating device.
  • Compressor 1 compresses the refrigerant.
  • the refrigerant consists of carbon dioxide, but other refrigerants can be used.
  • the condenser 2 constituting the fluid refrigerant heat exchanger performs heat exchange between the refrigerant compressed by the compressor 1 and the air flowing inside.
  • the air heated by the condenser 2 increases the temperature in a space of a predetermined size such as a room as warm air.
  • the temperature of the warm air is detected by a blowing temperature sensor 11 that is the fluid temperature detecting unit 11.
  • a blower 5 that circulates air in the room so as to pass through the condenser 2 is provided.
  • the refrigerant that has passed through the condenser 2 from the compressor 1 flows toward the evaporator 7 that forms an external heat exchanger that absorbs heat from the outside air.
  • a high-pressure side heat exchanging portion 15a and a first electronic expansion valve 16 (also simply referred to as a first expansion valve 16) are connected.
  • the second electronic expansion valve 9 (also simply referred to as the second expansion valve 9) constituting the control valve for defrosting is fully closed except during defrosting. Accordingly, the refrigerant in the normal state flows through the high pressure side heat exchange unit 15 a and the first expansion valve 16 to the evaporator 7.
  • the refrigerant that has expanded in the evaporator 7 and has taken the heat of vaporization from the outside air passes through the low-pressure side heat exchange section 15b and is guided to the suction side of the compressor 1. Thereby, the refrigerant absorbs heat from the outside air and heats the air passing through the condenser 2 via the condenser 2. This air circulates in the room and heats the room.
  • Control can be performed by the method shown in FIG. 2 or the method shown in FIG. As a modification, as shown in FIG. 9, the method of FIG. 2 and the method of FIG. 6 can be used simultaneously.
  • the fifth embodiment employs the method of FIG.
  • the opening degree of the second expansion valve 9 that forms the control valve for defrosting is controlled by a control signal from the control device 10.
  • the control device 10 controls at least the rotation of the blower 5 and the opening degree of the second expansion valve 9 constituting the control valve for defrosting. Then, the control device 10 switches the second expansion valve 9 from closed to open in response to the start of the defrosting operation of the evaporator 7. And when the air blower 5 has stopped, the air blower 5 is rotated.
  • the high-temperature and high-pressure refrigerant compressed by the compressor 1 raises the temperature of the air via the condenser 2.
  • the temperature in a predetermined space such as a room rises.
  • air passes through the condenser 2 by the blower 5 and circulates in the room.
  • the defrosting operation is started at a known timing such as when frosting of the evaporator 7 is detected.
  • the blower 5 continues to rotate, and the indoor air circulates through the condenser 2.
  • the opening degree of the second expansion valve 9 constituting the control valve for defrosting becomes the defrosting opening degree from the fully closed state during the normal operation during non-defrosting.
  • the first expansion valve 16 is fully closed.
  • the refrigerant outflow side of the condenser 2 and the refrigerant inflow side of the evaporator 7 are connected by the high-pressure side heat exchange unit 15a and the first expansion valve 16. Moreover, the refrigerant
  • An internal heat exchanger 15 is configured by coupling the high-pressure side heat exchange unit 15a and the low-pressure side heat exchange unit 15b so as to transfer heat to each other.
  • a fluid refrigerant heat exchanger is configured by the condenser 2 through which air flows, as shown in FIG. That is, the condenser 2 includes an air refrigerant heat exchanger that performs heat exchange between the refrigerant compressed by the compressor 1 and air.
  • the heat pump system 100 includes a refrigeration system device 50, a blower 5, a condenser 2, and a room (not shown) having a limited space volume in which hot air from the condenser 2 circulates (inside or inside the room).
  • the apparatus 6 is comprised.
  • the heating device 6 includes an indoor heating device 6 for heating with air heated by the air refrigerant heat exchanger 2.
  • the fluid circulation device 5 includes a blower 5 that circulates the air heated by the air refrigerant heat exchanger so as to pass through the air refrigerant heat exchanger 2.
  • the opening degree of the control valve is increased and the blower 5 is rotated during the defrosting operation, the heat held by the indoor heating device 6 that heats the air in the air refrigerant heat exchanger 2 is used as the refrigerant.
  • the defrosting operation of the evaporator 7 can be performed by supplying.
  • the heat pump system 100 using a highly efficient refrigeration cycle can be provided by performing the defrosting operation in a short time while suppressing the power consumption or the power consumption during the defrosting operation.
  • control of the heat pump system 100 of the fifth embodiment can be performed by the method of FIG. 2 or the method of FIG.
  • a fluid temperature detection unit 11 Blowing temperature sensor 11
  • a refrigerant temperature detector 12 refrigerant discharge temperature sensor 12 that detects the temperature of the refrigerant compressed by the compressor 1 is used.
  • the control device 10 decreases the rotation speed of the compressor 1 by a predetermined amount.
  • the detection unit 11 is used.
  • a refrigerant temperature detector 12 that detects the temperature of the refrigerant compressed by the compressor 1 is used.
  • the control device 10 sets the opening degree of the control valve 9 in advance. A predetermined amount is further increased from the defrosting opening.
  • the opening degree of the control valve 9 is increased by a predetermined amount. Therefore, the pressure on the high pressure side of the compressor 1 can be reduced, and the power or power of the compressor 1 can be reduced. Furthermore, when the pressure on the high pressure side of the compressor 1 is reduced, the temperature of the refrigerant passing through the condenser 2 is lowered, and the refrigerant can sufficiently absorb heat.
  • FIG. 6 A heat pump system according to the sixth embodiment will be described with reference to FIG.
  • hot water heated by the water-refrigerant heat exchanger 2 is used for the floor heating device 6, and the hot water storage tank 21 is connected to the hot water storage tank 21 via the hot water supply heat exchanger 22 for supplying high-temperature water. It is also used for the hot water supply device 60 for heating the water supply (hot water supply water).
  • the hot water from the water / refrigerant heat exchanger 2 can be switched to the floor heating panel 4 or the hot water supply heat exchanger 22 depending on whether the circulation pump 5 or the first hot water supply pump 23 is operated.
  • a second hot water supply pump 24 is provided between the hot water supply heat exchanger 22 and the hot water storage tank 21.
  • the heat capacity of the hot water flowing through the second water refrigerant heat exchanger 2 is switched and controlled between the circulation pump 5 and the first hot water supply pump 23 to increase it. be able to.
  • the pumps 5 and 23 having the larger heat capacity can be operated.
  • the hot water heat exchanger 22 may be provided in the hot water storage tank 21.
  • the hot water supply heat exchanger 22 is a heat exchanger so that the hot water in the hot water storage tank 21 and the hot water in the floor heating device 6 are not mixed. This type of heat exchanger may be provided on the floor heating device 6 side.
  • the heat pump system 100 includes a refrigeration cycle apparatus 50, a floor heating apparatus 6, and a hot water supply apparatus 60.
  • the water refrigerant heat exchanger 2 in FIG. 8 constitutes the fluid refrigerant heat exchanger 2
  • the floor heating device 6 and the hot water supply device 60 constitute the heating devices 6 and 60.
  • the circulation pump 5 and the first hot water supply pump 23 constitute fluid circulation devices 5 and 23, and the control valve 9 can adjust the opening degree from fully closed to fully opened by the control device 10.
  • the heat pump system 100 includes a compressor 1 that compresses a refrigerant, and a fluid refrigerant heat exchanger 2 that performs heat exchange between the refrigerant compressed by the compressor 1 and a fluid. Furthermore, circulation pumps serving as fluid circulation devices 5 and 23 for circulating the fluid through the fluid refrigerant heat exchanger 2 to the heating devices 6 and 60 through which the hot water as the fluid heated by the fluid refrigerant heat exchanger 2 flows. 5 and a first hot water supply pump 23 are provided.
  • control valve 9 that controls the flow of the refrigerant that has passed through the fluid refrigerant heat exchanger 2, the evaporator 7 in which the refrigerant that has passed through the control valve 9 flows and absorbs heat from the outside air, and at least the fluid circulation devices 5 and 23 are controlled.
  • a control device 10 for controlling the valve 9 is provided.
  • the control device 10 makes the opening degree of the control valve 9 larger during the defrosting operation of the evaporator 7 than during the non-defrosting operation, and at least of the circulation pump 5 and the first hot water supply pump 23 serving as the fluid circulation device 5. Either of them is operated and hot water as a fluid continues to flow through the fluid refrigerant heat exchanger 2.
  • coolant heat exchanger 2 is filled is supplied to a refrigerant
  • a heat pump system using a highly efficient refrigeration cycle can be provided by performing the defrosting operation in a short time while suppressing power consumption or power consumption during the defrosting operation.
  • the heating devices 6 and 60 include either the floor heating device 6 that heats the floor or the hot water supply device 60 that includes the hot water supply device 60 that supplies hot water to the tank. Therefore, the defrosting of the evaporator can be quickly completed using the heat held by the floor heating device 6 or the hot water supply device 60.
  • the room heated by the air passing through the condenser does not have to be a room in a house, but may be in an in-vehicle storage or the like that becomes a closed space.
  • the flow rate is adjusted by the control valve, the flow rate is controlled by controlling the duty ratio of the ON-OFF valve, not limited to fine adjustment of the opening degree of the valve.
  • the electromagnetic valve it is of course possible to use a control valve whose valve operation is controlled by a control signal such as an electric valve using a step motor.
  • the compressor is not limited to an electric compressor, and may be a compressor driven by an internal combustion engine.
  • the heating device can be composed of various devices through which hot water flows.
  • the heating device may be a device that supplies hot water to a hot water pool or a hot water tank serving as a tank.
  • the fluid circulating in the pump is not limited to water, but may be other fluids such as oil.
  • the opening of the control valve when the opening of the control valve is increased by a predetermined amount to reduce the pressure on the high pressure side and the power or power of the compressor is reduced, the opening for defrosting is not fully opened but is further opened. Start defrosting in a state where the degree can be increased. However, when the rotational speed of the compressor is controlled as shown in FIG. 2, the control valve 9 is fully opened during defrosting. In this case, a simple solenoid valve having a structure for switching between fully closed and fully open can be used.

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  • Engineering & Computer Science (AREA)
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  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Water Supply & Treatment (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Air Conditioning Control Device (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

L'invention concerne un système de pompe à chaleur (100) comportant un échangeur thermique (2) qui échange la chaleur entre un réfrigérant et un fluide, un dispositif de chauffage (6, 60) à travers lequel s'écoule le fluide chauffé par l'échangeur thermique, un dispositif de circulation de fluide (5, 23) qui fait circuler le fluide pour un passage à travers l'échangeur thermique, une soupape de commande (9) qui commande l'écoulement du réfrigérant, un évaporateur (7) qui absorbe la chaleur de l'air extérieur, et un dispositif de commande (10). Pendant l'opération de dégivrage de l'évaporateur (7), le dispositif de commande (10) ouvre la soupape de commande (9) plus longtemps que pendant une opération qui n'est pas un dégivrage, et fait fonctionner le dispositif de circulation de fluide (5, 23) pour faire passer le fluide à travers l'échangeur thermique (2).
PCT/JP2014/002116 2013-04-22 2014-04-15 Système de pompe à chaleur Ceased WO2014174792A1 (fr)

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CN113654283A (zh) * 2021-09-17 2021-11-16 珠海格力电器股份有限公司 冷媒循环系统、化霜方法、冰箱及空调
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CN104896757B (zh) * 2015-06-17 2017-11-07 合肥美的暖通设备有限公司 热水机及其控制方法
WO2017022421A1 (fr) * 2015-08-04 2017-02-09 株式会社デンソー Système de pompe à chaleur
JP6323489B2 (ja) * 2015-08-04 2018-05-16 株式会社デンソー ヒートポンプシステム
JP6493370B2 (ja) * 2016-01-25 2019-04-03 株式会社デンソー ヒートポンプシステム
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JP5958411B2 (ja) 2016-08-02
JP2014214886A (ja) 2014-11-17

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