WO2015118674A1 - ヒートポンプ給湯器システム - Google Patents
ヒートポンプ給湯器システム Download PDFInfo
- Publication number
- WO2015118674A1 WO2015118674A1 PCT/JP2014/052980 JP2014052980W WO2015118674A1 WO 2015118674 A1 WO2015118674 A1 WO 2015118674A1 JP 2014052980 W JP2014052980 W JP 2014052980W WO 2015118674 A1 WO2015118674 A1 WO 2015118674A1
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- WIPO (PCT)
- Prior art keywords
- circuit
- heat pump
- water
- water heater
- pump water
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 492
- 239000003507 refrigerant Substances 0.000 claims description 31
- 238000001514 detection method Methods 0.000 claims description 10
- 230000008014 freezing Effects 0.000 description 21
- 238000007710 freezing Methods 0.000 description 21
- 238000009413 insulation Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000006837 decompression Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Images
Classifications
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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
- 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
- F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
-
- 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
-
- 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
- F24H15/215—Temperature of the water before 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
- F24H15/219—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
- F24H15/258—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
- F24H15/305—Control of valves
- F24H15/325—Control of valves of by-pass valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- 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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0271—Valves
-
- 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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/08—Storage tanks
-
- 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
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- 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
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C2001/006—Systems comprising cooling towers, e.g. for recooling a cooling medium
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Definitions
- the present invention relates to a heat pump water heater system.
- Such a heat pump water heater system has a hot water storage operation mode in which hot water is stored in the hot water storage tank, and a heat insulation operation mode in which the temperature in the hot water storage tank is kept constant.
- the heat pump water heater system starts the hot water storage operation mode
- low-temperature water flowing out from the water receiving tank is supplied to the heat pump water heater through the water supply circuit.
- the low-temperature water supplied to the heat pump water heater rises in temperature by exchanging heat with the refrigerant in the heat pump water heater, and is supplied to the hot water tank through the hot water circuit.
- the high-temperature water flowing out from the hot water tank is filled in the circulation circuit but is not flowing.
- the heat pump water heater system stops the hot water storage operation mode when it is determined that the hot water stored in the hot water tank has reached the set amount while the hot water storage operation mode is being executed.
- the heat pump water heater system determines that the temperature of the high-temperature water stored in the hot water tank has dropped and reached the set temperature or less, the heat pump water heater system starts a heat insulation operation mode for increasing the water temperature in the hot water tank. To do.
- the heat pump water heater system starts the heat insulation operation mode
- high-temperature water flowing out from the hot water tank is supplied to the heat pump water heater through the circulation circuit.
- the high temperature water supplied to the heat pump water heater rises in temperature by exchanging heat with the refrigerant in the heat pump water heater, and is supplied to the hot water storage tank through the hot water circuit.
- the low-temperature water flowing out from the water receiving tank is filled in the water supply circuit but is not flowing.
- the heat pump hot water supply system having the above-described two operation modes is intended to store hot water in a hot water tank using late-night power. For this reason, the heat pump hot water supply system often performs a hot water storage operation mode at night, and often performs a heat insulation operation mode from morning to evening after the hot water storage operation ends.
- the heat pump water heater system may execute the hot water storage operation mode at night in winter when the outside air temperature around the heat pump hot water system is the lowest. At this time, even in Japan, depending on the local weather conditions, the outside air temperature may drop to about ⁇ 20 ° C., and the heat insulation circuit without water flow during the hot water storage operation mode is exposed to low temperature outside air. In such a case, by providing a heater in the heat retaining circuit in the unit, the water in the heat retaining circuit is suppressed from freezing due to a temperature drop.
- the present invention has been made against the background of the above-described problems, and an object of the present invention is to obtain a heat pump water heater that suppresses freezing of a water circuit in an environment of a low outside air temperature while reducing the cost as compared with the prior art. .
- a heat pump water heater system includes a heat pump water heater, a hot water tank for supplying water to the heat pump water heater via a first circuit, and a second circuit connected to the first circuit indoors.
- a water receiving tank for supplying water to the heat pump water heater.
- the first circuit connecting the hot water storage tank and the heat pump water heater and the second circuit through which water flowing out of the water receiving tank flows are connected indoors. For this reason, freezing of the water circuit in an environment with a low outside air temperature can be suppressed while reducing the cost as compared with the conventional case.
- FIG. 1 is a diagram showing an outline of a heat pump water heater system 200 according to Embodiment 1 of the present invention.
- the heat pump water heater system 200 includes a heat pump water heater 100, a hot water storage tank 101, a water receiving tank 102, a water piping kit 103, and a pump 108.
- the heat pump water heater 100 is provided outdoors, for example. Details of the heat pump water heater 100 will be described later.
- the hot water storage tank 101 is an open-type tank that stores hot water that has become high temperature in the heat pump water heater 100, and is provided indoors, for example.
- the water receiving tank 102 is a tank that stores cold water to be supplied to the heat pump water heater 100, and is provided indoors, for example.
- the heat pump water heater 100 and the hot water storage tank 101 are connected by a water inlet circuit 104, a hot water outlet circuit 105, and a heat retention circuit 107.
- the hot water storage tank 101 and the water receiving tank 102 are connected by a water supply circuit 106 and a heat retention circuit 107.
- the water receiving tank 102 and the heat pump water heater 100 are connected by a water incoming circuit 104 and a water supply circuit 106.
- a pump 108 is provided on the water supply circuit 106.
- the water piping kit 103 includes the electric valve 10, check valves 12 a and 12 b, and a part of the water supply circuit 106 and the heat retaining circuit 107.
- the check valves 12a and 12b may be collectively referred to as the check valve 12.
- the water piping kit 103 is configured to join the water supply circuit 106 and the heat retaining circuit 107. That is, the part of the water pipe that joins the water supply circuit 106 and the heat retaining circuit 107 is separated from the heat pump water heater 100 to form a pipe kit and installed indoors.
- the water piping kit 103 is desirably provided indoors in the vicinity of the hot water tank 101 so as not to be affected by low outside air.
- the electric valve 10 is a valve provided in the water supply circuit 106.
- the motor-operated valve 10 passes or blocks water from the water receiving tank 102 toward the water inlet circuit 104.
- the check valve 12 a is a valve provided in the heat insulation circuit 107.
- the check valve 12 a functions to allow the water in the hot water storage tank 101 to flow into the heat pump water heater 100 and prevent the water in the heat pump water heater 100 and the water receiving tank 102 from flowing into the hot water tank 101.
- the check valve 12 b is a valve provided in the water supply circuit 106.
- the check valve 12b functions to allow the water in the water receiving tank 102 to flow into the heat pump water heater 100 and prevent the water in the heat pump water heater 100 and the hot water storage tank 101 from flowing into the water receiving tank 102.
- a merging section 9 where the water supply circuit 106 and the heat retaining circuit 107 merge is provided inside the water piping kit 103.
- the junction 9 is located indoors. As a result, the water that has flowed out of the hot water storage tank 101 and the water receiving tank 102 and has reached the joining section 9 joins and flows into the heat pump water heater 100 through the water inlet circuit 104.
- FIG. 2 is a diagram showing a refrigerant circuit and a water circuit of the heat pump water heater 100 of the heat pump water heater system 200 according to Embodiment 1 of the present invention.
- the heat pump water heater 100 includes a compressor 1, a radiator 2, a decompression device 3, an evaporator 4, and control means 8.
- the compressor 1 compresses and discharges the refrigerant flowing in the refrigeration cycle into a high-temperature and high-pressure refrigerant.
- the radiator 2 is a heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant circuit and the water supplied from the water supply circuit 106.
- the outlet pipe of the water circuit of the radiator 2 is connected to the hot water circuit 105.
- the decompression device 3 reduces the pressure of the refrigerant.
- the evaporator 4 is a heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant circuit and the outside air.
- Control means 8 adjusts the frequency of the compressor 1 and the opening of the decompression device 3. Further, the control means 8 opens or closes the motor operated valve 10. The control means 8 opens the motor operated valve 10 in the hot water storage operation mode. The control means 8 closes the motor operated valve 10 in the heat retention operation mode.
- the control means 8 is configured by, for example, hardware such as a circuit device that realizes this function, or software executed on an arithmetic device such as a microcomputer or a CPU.
- the refrigerant flowing through the refrigerant pipe in the heat pump water heater 100 becomes a high-temperature and high-pressure refrigerant in the compressor 1 and then flows into the radiator 2.
- the refrigerant that has flowed into the radiator 2 exchanges heat with the water that has flowed into the heat pump water heater system 200 through the water inlet circuit 104 and decreases in temperature.
- the refrigerant whose temperature has been lowered in this way is decompressed by the decompression device 3.
- the decompressed refrigerant flows into the evaporator 4, exchanges heat with the outside air, flows into the compressor 1 again, and thereafter repeats the same cycle.
- the water flowing into the heat pump water heater 100 exchanges heat with the refrigerant in the refrigerant circuit and rises in temperature, and then flows out to the hot water circuit 105.
- the hot water storage operation mode is an operation mode in which hot water is stored in the hot water storage tank 101.
- the heat insulation operation mode is an operation mode in which the temperature in the hot water tank 101 is kept constant.
- Hot water storage operation mode In the hot water storage operation mode, the control means 8 opens the motor-operated valve 10. For this reason, the water that flows out of the water receiving tank 102 flows into the water piping kit 103 through the water supply circuit 106, passes through the motor-operated valve 10 and the check valve 12 b in this order, and flows through the heat retaining circuit 107 at the junction 9. Join. In addition, although the water which flowed out from the hot water storage tank 101 flows into the heat retention circuit 107, it does not reach the junction 9 and is not supplied to the heat pump water heater 100.
- the water that has flowed out of the water receiving tank 102 merges with the water that flows through the heat retaining circuit 107 at the merge section 9, and is supplied to the heat pump water heater 100 through the water intake circuit 104.
- the water that flows into the heat pump water heater 100 exchanges heat with the refrigerant to become high-temperature water, flows out of the heat pump water heater 100, and flows into the hot water tank 101 through the hot water circuit 105.
- the heat retaining circuit 107 is provided with a check valve 12a. For this reason, the water flowing out from the water receiving tank 102 does not flow into the heat retaining circuit 107, and the hot water storage tank 101 is in a state where hot water is accumulated.
- the hot water storage operation mode is carried out until the water level of the hot water stored in the hot water storage tank 101 reaches the set water level.
- the control means 8 determines that the hot water level in the hot water storage tank 101 has reached the set water level.
- the hot water storage operation mode is terminated.
- the temperature of the hot water stored in the hot water storage tank 101 gradually decreases due to the influence of the indoor temperature, and may be lower than the temperature required for hot water use. For this reason, when it is determined that the temperature of the water in the hot water storage tank 101 is lower than the preset temperature, the control means 8 performs the heat retaining operation mode.
- the control means 8 closes the motor-operated valve 10. For this reason, the water flowing out of the water receiving tank 102 is in a state where there is no flow of water stored in the water supply circuit 106 and is not supplied to the heat retaining circuit 107. Therefore, only water flowing out of the hot water tank 101 is supplied to the heat pump water heater 100 through the heat retaining circuit 107 and the water inlet circuit 104.
- the water supplied to the heat pump water heater 100 exchanges heat with the refrigerant in the heat pump water heater 100 and rises in temperature, and flows into the hot water tank 101 through the hot water circuit 105.
- the control means 8 continues the heat insulation operation mode until the temperature of the hot water in the hot water storage tank 101 becomes equal to or higher than the set value. In this manner, in the heat retaining operation mode, the water temperature in the hot water storage tank 101 can be maintained using the hot water in the hot water storage tank 101 as high temperature water again.
- FIG. 3 is a diagram showing an outline of a heat pump water heater system 400 according to a comparative example.
- the heat pump water heater system 400 includes a heat pump water heater 300, a hot water storage tank 301, a water receiving tank 302, a hot water circuit 305, a water supply circuit 306, a heat retention circuit 307, a pump 308, Is provided.
- a junction (not shown) of the water supply circuit 306 and the heat retaining circuit 307 is provided outdoors.
- the hot water circuit 305, the water supply circuit 306, and the heat insulation circuit 307 are constructed outdoors, the water circuit part in which water does not flow in each operation mode is exposed to a low outside air environment and is outdoors. A problem arises that the pipes located may freeze. Moreover, in order to suppress the freezing of piping located outdoors, it is necessary to provide heating means such as a heater, resulting in a problem of requiring product cost.
- the heat pump water heater system 200 includes a heat pump water heater 100, a hot water storage tank 101 that supplies water to the heat pump water heater 100 via the heat retaining circuit 107, a heat retaining circuit 107, and an indoor space. And a water receiving tank 102 for supplying water to the heat pump water heater 100 through a water supply circuit 106 connected in the above. That is, a heat retaining circuit 107 that connects the hot water storage tank 101 and the heat pump water heater 100 and a water supply circuit 106 through which water flowing out of the water receiving tank 102 flows are connected indoors. For this reason, freezing of the water circuit can be suppressed without using a heater. Therefore, freezing of the water circuit in an environment with a low outside air temperature can be suppressed while reducing the cost as compared with the conventional case.
- the number of pipes can be reduced, so the number of heaters can be reduced, leading to a reduction in construction work for local water piping.
- a water piping kit 103 is provided indoors. For this reason, there are two water circuits installed outdoors, that is, a part of the hot water circuit 105 and the incoming water circuit 104. Therefore, since there is no portion where water does not flow in the water piping section installed outdoors in each operation mode, the water circuit can be prevented from freezing during the heat pump operation.
- a water piping kit 103 configured to join the water supply circuit 106 and the heat retaining circuit 107 is provided indoors. For this reason, it is possible to reduce the construction of the local construction.
- Embodiment 2 FIG. In the second embodiment, unlike the first embodiment, the heat pump water heater system 200 includes the inlet pipe temperature sensor 5 or the outlet pipe temperature sensor 6.
- FIG. 4 is a diagram showing a refrigerant circuit and a water circuit of the heat pump water heater 100 of the heat pump water heater system 200 according to Embodiment 2 of the present invention.
- the heat pump water heater 100 includes an inlet pipe temperature sensor 5 and an outlet pipe temperature sensor 6.
- the inlet pipe temperature sensor 5 is temperature detection means provided on the inlet side of the radiator 2.
- the outlet pipe temperature sensor 6 is temperature detection means provided on the outlet side of the radiator 2.
- the inlet pipe temperature sensor 5 detects the temperature of water supplied from the water receiving tank 102 to the heat pump water heater 100 through the water supply circuit 106 and the water inlet circuit 104 in the hot water storage operation mode.
- the inlet pipe temperature sensor 5 detects the temperature of water supplied from the hot water storage tank 101 to the heat pump water heater 100 through the heat retaining circuit 107 and the water inlet circuit 104 in the heat retaining operation mode.
- the outlet pipe temperature sensor 6 detects the temperature of the water that is supplied from the water receiving tank 102 to the heat pump water heater 100 through the water supply circuit 106 and the water inlet circuit 104 and exchanges heat with the refrigerant.
- the outlet pipe temperature sensor 6 detects the temperature of the water supplied from the hot water storage tank 101 to the heat pump water heater 100 through the heat retaining circuit 107 and the incoming water circuit 104 and exchanged heat with the refrigerant in the heat retaining operation mode.
- the control unit 8 starts the operation of the compressor 1. Further, when the control unit 8 determines that the inlet pipe temperature sensor 5 or the outlet pipe temperature sensor 6 is equal to or higher than a threshold temperature (for example, 10 ° C.) while the compressor 1 is operating, the compressor 1 Stop operation.
- a threshold temperature for example, 3 ° C.
- the control unit 8 determines that the detected value of at least one of the inlet pipe temperature sensor 5 and the outlet pipe temperature sensor 6 is equal to or lower than the threshold temperature. In that case, the compressor 1 is operated. When the compressor 1 is operated in this manner, since the high-pressure and high-temperature refrigerant flows through the radiator 2, the entire radiator 2 becomes high temperature due to heat conduction, and the temperature of the water circuit in the heat pump water heater 100 also rises. . For this reason, even if the heat pump water heater 100 stops operating, the water in the water piping inside the heat pump water heater 100 has no flow and is exposed to a low outside air environment, the water is not used. Freezing of the circuit can be suppressed. Therefore, freezing of the water circuit in an environment with a low outside air temperature can be suppressed while reducing the cost as compared with the conventional case.
- Embodiment 3 FIG.
- the water piping kit 103 is provided outdoors near the heat pump water heater 100 or inside the heat pump water heater 100.
- FIG. 5 is a diagram showing an outline of a heat pump water heater system 200 according to Embodiment 3 of the present invention.
- the water piping kit 103 is provided with connection ports for the hot water circuit 105 and the heat insulation circuit 107.
- a bypass circuit 20 that bypasses the hot water circuit 105 and the heat retaining circuit 107 is provided inside the water piping kit 103.
- the bypass circuit 20 is provided with an electric valve 13.
- a temperature sensor 14 is provided inside the water piping kit 103 and at the inlet of the heat retention circuit 107.
- the temperature sensor 14 is a temperature detection unit that detects the temperature of the heat retention circuit 107.
- the control means 8 adjusts the opening degree of the motor-operated valve 13 based on the detection value of the temperature sensor 14. For example, when it is determined that the detected value of the temperature sensor 14 is equal to or lower than a threshold temperature (for example, 3 ° C.), the control unit 8 opens the motor operated valve 13. As a result, high-temperature water flowing out of the heat pump water heater 100 is supplied to the heat retaining circuit 107 through the hot water circuit 105 and the bypass circuit 20. Further, for example, when the control unit 8 determines that the detected value of the temperature sensor 14 is equal to or higher than a threshold temperature (for example, 5 ° C.), the motorized valve 13 is closed. Thereby, the operation
- a threshold temperature for example, 3 ° C.
- the water flowing out of the hot water storage tank 101 does not flow into the heat retaining circuit 107 during the hot water storage operation mode. For this reason, in the low external air environment, since the water in piping may freeze, conventionally, freezing of a water circuit is controlled by installing a heater or the like.
- the heat pump water heater system 200 has a bypass circuit 20 that bypasses the hot water circuit 105 and the heat retaining circuit 107, and the motor operated valve 13 is provided on the bypass circuit 20. Yes.
- the high temperature water which flowed out from the heat pump water heater 100 can be supplied to the heat insulation circuit 107 through the hot water supply circuit 105 and the bypass circuit 20, and it suppresses freezing even if the heat insulation circuit 107 is provided outdoors. Can do.
- the temperature of the heat retaining circuit 107 can be increased efficiently without providing a heating means such as a heater, and freezing of the water circuit can be suppressed.
- freezing of the water circuit can be suppressed.
- the control means 8 keeps the opening degree of the motor-operated valve 13 as small as possible. It is desirable to gradually increase the opening degree of the motor-operated valve 13 while confirming the rise of the temperature sensor 14. In this way, freezing of the water circuit can be suppressed while minimizing the influence on hot water storage performance.
- Embodiment 4 FIG.
- the heat pump water heater system 200 includes a hot water tank temperature sensor 101a, an inlet pipe temperature sensor 5, and an outside air temperature sensor 7.
- FIG. 6 is a diagram showing an outline of a heat pump water heater system 200 according to Embodiment 4 of the present invention.
- FIG. 7 is a diagram showing a refrigerant circuit and a water circuit of the heat pump water heater 100 of the heat pump water heater system 200 according to Embodiment 4 of the present invention.
- FIG. 8 is a correlation table of the outside air temperature, the hot water tank temperature, and the heat insulation circuit water temperature for estimating the darkness value of opening and closing of the electric valve 13 of the water piping kit 103 of the heat pump water heater system 200 according to Embodiment 4 of the present invention. It is.
- a hot water tank temperature sensor 101 a that detects the temperature inside the hot water tank 101 is provided inside the hot water tank 101.
- the heat pump water heater 100 is provided with an inlet pipe temperature sensor 5 provided on the inlet side of the radiator 2 and an outside air temperature sensor 7 for detecting the outside air temperature.
- the inlet pipe temperature sensor 5 detects the temperature of the water supply circuit 106 through which the water flowing out of the water receiving tank 102 flows. That is, in the hot water storage operation mode, it is impossible to measure the water temperature on the side of the heat retaining circuit 107 through which the water flowing out of the hot water storage tank 101 flows, where the flow of water stops and the possibility of freezing is high.
- the control means 8 correlates the detected value of the outside air temperature sensor 7, the detected value of the hot water tank temperature sensor 101 a, and the detected value of the inlet pipe temperature sensor 5.
- the storage means provided therein stores the correlation as shown in FIG.
- the correlation shown in FIG. 8 is as shown in (1-1) to (3-5) below.
- the water inlet temperature is 10 ° C. (1-2) When the outside air temperature is 5 ° C. and the hot water tank temperature is 65 ° C., the water inlet temperature is 9 ° C. (1-3) When the outside air temperature is 5 ° C. and the hot water tank temperature is 60 ° C., the water inlet temperature is 8 ° C. (1-4) When the outside air temperature is 5 ° C. and the hot water tank temperature is 55 ° C., the water inlet temperature is 7 ° C. (1-5) When the outside air temperature is 5 ° C. and the hot water tank temperature is 50 ° C., the water inlet temperature is 5 ° C.
- control means 8 calculates the temperature of the heat retaining circuit 107 based on the detected value of the outside air temperature sensor 7, the detected value of the hot water tank temperature sensor 101a, and the stored content of the correlation described above ( presume.
- the control means 8 opens the motor-operated valve 13 when the calculated temperature of the heat retention circuit 107 is a threshold temperature (for example, 3 ° C.) or less. Thereby, since the high temperature water which flowed out from the heat pump water heater 100 is supplied to the heat retention circuit 107 through the hot water supply circuit 105 and the bypass circuit 20, freezing of the water circuit can be suppressed.
- the control means 8 desirably keeps the motor-operated valve 13 open with a small opening within a range that does not affect the performance of the hot water storage operation mode.
- the control unit 8 stores the detected value of the outside air temperature sensor 7, the detected value of the hot water tank temperature sensor 101 a, and the storage unit of the control unit 8.
- the motor-operated valve 13 is opened when the value calculated based on the stored data is equal to or lower than the threshold temperature. For this reason, even if the temperature sensor 14 which detects the temperature of the heat retention circuit 107 is not provided, the freezing of the water circuit can be suppressed.
- the heat retaining circuit 107 corresponds to the first circuit of the present invention.
- the water supply circuit 106 corresponds to the second circuit of the present invention.
- the tapping circuit 105 corresponds to the third circuit of the present invention.
- the incoming water circuit 104 corresponds to the fourth circuit of the present invention.
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Abstract
Description
図1は本発明の実施の形態1に係るヒートポンプ給湯器システム200の概略を示す図である。図1に示されるように、ヒートポンプ給湯器システム200は、ヒートポンプ給湯器100と、貯湯槽101と、受水槽102と、水配管キット103と、ポンプ108と、を備える。
ヒートポンプ給湯器100内の冷媒配管を流れる冷媒は、圧縮機1で高温高圧の冷媒となった後、放熱器2へ流入する。放熱器2へ流入した冷媒は、入水回路104を通ってヒートポンプ給湯器システム200に流入した水と熱交換して温度低下する。こうして温度低下した冷媒は、減圧装置3によって減圧される。減圧された冷媒は蒸発器4へと流入し、外気と熱交換して再び圧縮機1へと流入し、以後同じサイクルを繰り返す。一方、ヒートポンプ給湯器100内に流入した水は、冷媒回路内の冷媒と熱交換して温度上昇した後、出湯回路105に流出する。
貯湯運転モードにおいて、制御手段8は電動弁10を開放する。このため、受水槽102から流出した水は、給水回路106を介して水配管キット103へ流入し、電動弁10、逆止弁12bを順に通過し、合流部9で保温回路107を流れる水と合流する。なお、貯湯槽101から流出した水は、保温回路107に流入するものの合流部9に達することはないため、ヒートポンプ給湯器100に供給されることもない。
保温運転モードにおいて、制御手段8は、電動弁10を閉塞する。このため、受水槽102から流出した水は、給水回路106に貯まっているものの流れが無い状態であり、保温回路107に供給されることはない。したがって、貯湯槽101から流出した水のみが、保温回路107、入水回路104を通ってヒートポンプ給湯器100に供給される。
図3に示されるように、ヒートポンプ給湯器システム400は、ヒートポンプ給湯器300と、貯湯槽301と、受水槽302と、出湯回路305と、給水回路306と、保温回路307と、ポンプ308と、を備える。給水回路306及び保温回路307の合流部(図示省略)が、屋外に設けられている。
本実施の形態2は、実施の形態1とは異なり、ヒートポンプ給湯器システム200が入口配管温度センサ5又は出口配管温度センサ6を備える。
図4に示されるように、ヒートポンプ給湯器100は、入口配管温度センサ5及び出口配管温度センサ6を備える。入口配管温度センサ5は、放熱器2の入口側に設けられた温度検出手段である。出口配管温度センサ6は、放熱器2の出口側に設けられた温度検出手段である。
本実施の形態3は、実施の形態1とは異なり、水配管キット103が、ヒートポンプ給湯器100の近くの屋外又はヒートポンプ給湯器100の内部に設けられている。
図5に示されるように、水配管キット103の内部には、出湯回路105と保温回路107との接続口が設けられている。また、水配管キット103の内部には、出湯回路105及び保温回路107をバイパスするバイパス回路20が設けられている。バイパス回路20には電動弁13が設けられている。水配管キット103の内部であって保温回路107の入口には温度センサ14が設けられている。温度センサ14は、保温回路107の温度を検出する温度検出手段である。
本実施の形態4は、実施の形態1とは異なり、ヒートポンプ給湯器システム200が、貯湯槽温度センサ101a、入口配管温度センサ5、及び外気温度センサ7を備える。
(1-2)外気温度5℃で貯湯槽温度65℃であるとき、水入口温度9℃である。
(1-3)外気温度5℃で貯湯槽温度60℃であるとき、水入口温度8℃である。
(1-4)外気温度5℃で貯湯槽温度55℃であるとき、水入口温度7℃である。
(1-5)外気温度5℃で貯湯槽温度50℃であるとき、水入口温度5℃である。
(2-2)外気温度0℃で貯湯槽温度65℃であるとき、水入口温度6℃である。
(2-3)外気温度0℃で貯湯槽温度60℃であるとき、水入口温度5℃である。
(2-4)外気温度0℃で貯湯槽温度55℃であるとき、水入口温度3℃である。
(2-5)外気温度0℃で貯湯槽温度50℃であるとき、水入口温度1℃である。
(3-2)外気温度-5℃で貯湯槽温度65℃であるとき、水入口温度4℃である。
(3-3)外気温度-5℃で貯湯槽温度60℃であるとき、水入口温度3℃である。
(3-4)外気温度-5℃で貯湯槽温度55℃であるとき、水入口温度2℃である。
(3-5)外気温度-5℃で貯湯槽温度50℃であるとき、水入口温度0℃である。
また、給水回路106が、本発明の第2回路に相当する。
また、出湯回路105が、本発明の第3回路に相当する。
また、入水回路104が、本発明の第4回路に相当する。
Claims (6)
- ヒートポンプ給湯器と、
第1回路を介して前記ヒートポンプ給湯器に水を供給する貯湯槽と、
前記第1回路と屋内で接続される第2回路を介して前記ヒートポンプ給湯器へ水を供給する受水槽と、を備えた
ことを特徴とするヒートポンプ給湯器システム。 - 前記ヒートポンプ給湯器は、
冷媒回路及び水回路を構成する放熱器と、
前記放熱器の入口側温度を検知する入口配管温度センサと、
前記放熱器の出口側温度を検知する出口配管温度センサと、
前記冷媒回路上に設けられる圧縮機と、
前記圧縮機を制御する制御手段と、を備え、
前記制御手段は、
前記ヒートポンプ給湯器の運転停止中に、前記入口配管温度センサの検知値及び前記出口配管温度センサの検知値の少なくとも一方が閾値温度以下である場合に、前記圧縮機の運転を開始させる
ことを特徴とする請求項1に記載のヒートポンプ給湯器システム。 - 前記第1回路及び前記第2回路よりも前記ヒートポンプ給湯器側に設けられる第4回路をさらに備え、
前記貯湯槽の水は、前記第1回路及び前記第4回路を介して前記ヒートポンプ給湯器に供給され、
前記受水槽の水は、前記第2回路及び前記第4回路を介して前記ヒートポンプ給湯器に供給される
ことを特徴とする請求項1又は請求項2に記載のヒートポンプ給湯器。 - ヒートポンプ給湯器と、
第1回路を介して前記ヒートポンプ給湯器に水を供給し、第3回路を介して前記ヒートポンプ給湯器から供給される水を貯める貯湯槽と、
前記第1回路の温度を検知する温度センサと、
前記第1回路と前記第3回路とを接続するバイパス回路と、
前記バイパス回路に設けられる電動弁と、
前記電動弁を制御する電動弁制御手段と、を備え、
前記電動弁制御手段は、
前記温度センサの検知値が閾値温度以下である場合に、前記電動弁を開放する
ことを特徴とするヒートポンプ給湯器システム。 - 冷媒回路及び水回路を構成する放熱器と、
外気温度を検知する外気温度センサと、
前記貯湯槽の内部の温度を検知する貯湯槽温度センサと、
前記放熱器の入口側温度を検知する入口配管温度センサと、
前記ヒートポンプ給湯器の運転停止中に、前記外気温度センサが検知した検知値、前記貯湯槽温度センサが検知した検知値、及び前記入口配管温度センサが検知した検知値を関連付けたデータを記憶する記憶手段と、を備え、
前記電動弁制御手段は、
前記外気温度センサの検知値、前記貯湯槽温度センサの検知値、及び前記記憶手段に記憶されている前記データに基づいて算出される値が閾値温度以下である場合に、前記電動弁を開放する
ことを特徴とする請求項4に記載のヒートポンプ給湯器システム。 - 前記第1回路よりも前記ヒートポンプ給湯器側に設けられる第4回路をさらに備え、
前記貯湯槽の水は、前記第1回路及び前記第4回路を介して前記ヒートポンプ給湯器に供給される
ことを特徴とする請求項4又は請求項5に記載のヒートポンプ給湯器。
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GB1610804.5A GB2537539B (en) | 2014-02-09 | 2014-02-09 | Heat pump water heating system |
PCT/JP2014/052980 WO2015118674A1 (ja) | 2014-02-09 | 2014-02-09 | ヒートポンプ給湯器システム |
JP2015561126A JP6138285B2 (ja) | 2014-02-09 | 2014-02-09 | ヒートポンプ給湯器システム |
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CN201916997U (zh) * | 2010-11-30 | 2011-08-03 | 江苏河海新能源有限公司 | 恒温供水装置 |
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2014
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JP2003139392A (ja) * | 2001-11-05 | 2003-05-14 | Denso Corp | 給湯装置 |
JP2005098568A (ja) * | 2003-09-24 | 2005-04-14 | Matsushita Electric Ind Co Ltd | 給湯装置 |
WO2005106346A1 (ja) * | 2004-04-28 | 2005-11-10 | Toshiba Carrier Corporation | ヒートポンプ式給湯装置 |
JP2011021796A (ja) * | 2009-07-15 | 2011-02-03 | Hitachi Appliances Inc | ヒートポンプ給湯機 |
JP2011064398A (ja) * | 2009-09-17 | 2011-03-31 | Panasonic Corp | ヒートポンプ式温水暖房装置 |
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GB201610804D0 (en) | 2016-08-03 |
GB2537539B (en) | 2018-11-14 |
JP6138285B2 (ja) | 2017-05-31 |
JPWO2015118674A1 (ja) | 2017-03-23 |
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