WO2006004046A1 - 給湯装置 - Google Patents
給湯装置 Download PDFInfo
- Publication number
- WO2006004046A1 WO2006004046A1 PCT/JP2005/012218 JP2005012218W WO2006004046A1 WO 2006004046 A1 WO2006004046 A1 WO 2006004046A1 JP 2005012218 W JP2005012218 W JP 2005012218W WO 2006004046 A1 WO2006004046 A1 WO 2006004046A1
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- WO
- WIPO (PCT)
- Prior art keywords
- heat
- hot water
- refrigerant
- refrigerant circuit
- water supply
- Prior art date
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Classifications
-
- 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage 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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- 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
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
- F24F2221/183—Details or features not otherwise provided for combined with domestic apparatus combined with a hot-water boiler
-
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/003—Indoor unit with water as a heat sink or heat source
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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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
Definitions
- the present invention relates to a hot water supply apparatus using a heat pump.
- a hot water supply apparatus that supplies hot water obtained by using a heat pump to a user side is known.
- the hot water supply apparatus disclosed in Patent Document 1 generates high-temperature water of about 90 ° C with one heat pump unit, and supplies high-temperature water stored in a hot-water storage tank to the user side.
- This hot water supply device generates medium-temperature water by heat exchange with high-temperature water, and supplies the obtained medium-temperature water to heat-utilizing equipment such as radiators for floor heating.
- the hot water supply device disclosed in Patent Document 2 separately generates high-temperature water of about 90 ° C and medium-temperature water of about 60 ° C to 80 ° C with one heat pump unit.
- This hot water supply device supplies the obtained high-temperature water to the user side, and supplies the obtained medium-temperature water to a heat-utilizing device such as a radiator for floor heating.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-056905
- Patent Document 2 Japanese Patent Laid-Open No. 2002-364912
- a hot water supply apparatus as disclosed in Patent Document 1, that is, a hot water supply apparatus that generates medium temperature hot water, even in an operation situation where only supply of medium temperature water is required, medium temperature water is generated. High temperature water must be generated. For this reason, this type of hot water supply apparatus may have an excessive consumption of energy such as electric power.
- Patent Document 2 that is, a hot water supply apparatus that individually generates high-temperature water and medium-temperature water with a single heat pump unit, there is no refrigerant in the single refrigerant circuit. It is necessary to generate two types of hot water with different temperatures by heat exchange. For this reason, if the refrigeration cycle conditions in the refrigerant circuit are set to conditions suitable for the production of high-temperature water, for example. As a result, the temperature of the obtained medium-temperature water is restricted, making it impossible to set the temperature of the medium-temperature water according to the request from the user side.
- the present invention has been made in view of power, and the object of the present invention is to reduce the amount of energy consumption such as electric power and to have a high degree of freedom in setting the hot water supply temperature and the like.
- the object is to provide an easy water heater.
- the first invention in addition to the operation of supplying hot water to the user side, an operation of supplying a heat medium having a medium temperature lower than the temperature of the hot water as a heating fluid to the heat utilization device (45) is possible.
- a first refrigerant circuit (20) that heats the refrigerant to a medium temperature by heat exchange with the first refrigerant, and a refrigeration cycle in which the second refrigerant is circulated and water is heated with the second refrigerant for hot water supply.
- the second refrigerant circuit (60) includes an evaporator that exchanges heat between the second refrigerant and the heat medium in the heat medium passage (40).
- a heat pump using the heat medium in the heat medium passage (40) as a heat source is configured.
- the heat medium passage (40) is configured such that the heat medium after passing through the heat utilization device (45) is converted into the evaporator (50) of the second refrigerant circuit (60). The operation to supply to is enabled.
- the heat medium passage (40) causes the heat medium heated to an intermediate temperature to evaporate the heat utilization device (45) and the second refrigerant circuit (60). It is possible to distribute to the container (50).
- the heat medium passage (40) converts the heat medium heated to an intermediate temperature into the evaporator (50) of the second refrigerant circuit (60). ) Can only be supplied.
- the first refrigerant circuit (20) includes:
- the air conditioner heat exchanger (24) for exchanging heat between the first refrigerant and room air is provided.
- the first refrigerant circuit (20) includes an operation in which the heat exchanger for air conditioning (24) serves as an evaporator, and the heat exchanger for air conditioning ( 24) is turned off as a condenser. It can be replaced.
- first refrigerant circuit (20) and the second refrigerant circuit (60) are provided, and the heat medium passage (40) is provided.
- the first refrigerant in each first refrigerant circuit (20) and the second refrigerant in each second refrigerant circuit (60) circulate in one heat medium passage (40) and heat medium. To be exchanged.
- the hot water supply device (10) can operate not only to supply hot water to the user side but also to supply a medium temperature heat medium to the heat-use device (45)! /,
- the In the first refrigerant circuit (20) the refrigeration cycle is performed by circulating the first refrigerant. At that time, the first refrigerant dissipates heat to the heat medium in the heat medium passage (40) and condenses. The heat medium flowing through the heat medium passage (40) is heated to the medium temperature by the first refrigerant, and then sent to the heat utilization device (45) and the evaporator (50) of the second refrigerant circuit (60). In the thermal energy utilization device (45), an object such as indoor air is heated using the supplied heat medium.
- the refrigeration cycle is performed by circulating the second refrigerant.
- the second refrigerant absorbs heat from the heat medium in the heat medium passage (40) and evaporates. That is, the second refrigerant circuit (60) constitutes a heat pump using the heat medium as a heat source.
- hot water for hot water supply is generated by heating water with the second refrigerant in the second refrigerant circuit (60).
- the heat medium that has passed through the heat utilization device (45) is supplied to the evaporator (50) of the second refrigerant circuit (60). Operation is possible.
- the evaporator (50) of the second refrigerant circuit (60) is located downstream of the heat utilization device (45) in the circulation direction of the heat medium, and the heat utilization device (45 ) And the heat medium whose temperature has dropped slightly exchanges heat with the second refrigerant in the evaporator (50) of the second refrigerant circuit (60).
- the first refrigerant in the first refrigerant circuit (20) exchanges heat with the heat medium whose temperature has further decreased by releasing heat to the second refrigerant.
- the heat medium heated by heat exchange with the first refrigerant is used as an evaporator of the heat utilization device (45) and the second refrigerant circuit (60). (50) can be distributed.
- the medium temperature heat medium is supplied not only to the heat utilization device (45) but also to the evaporator (50) of the second refrigerant circuit (60).
- the second refrigerant absorbs heat from the medium temperature heat medium.
- the operation of supplying the heat medium heated to an intermediate temperature only to the evaporator (50) of the second refrigerant circuit (60) is performed. It becomes possible. This operation is performed when it is not necessary to heat the object with the thermal equipment (45).
- the first refrigerant circuit (20) is provided with the air conditioner heat exchanger (24).
- the first refrigerant circulating in the first refrigerant circuit (20) is also sent to the air conditioner heat exchanger (24).
- the air conditioner heat exchanger (24) causes the indoor air to exchange heat with the first refrigerant, and cools or heats the indoor air.
- the air-conditioning heat exchanger (24) cools the room air.
- the indoor air is heated in the air conditioner heat exchanger (24).
- a heating operation in which the indoor air is heated in the air conditioner heat exchanger (24). Can be switched.
- one or both of the first refrigerant circuit (20) and the second refrigerant circuit (60) are provided, and the first refrigerant circuit (20) and the second refrigerant circuit (60) ) Is connected to one heat medium passage (40).
- the first refrigerants of all the first refrigerant circuits (20) can exchange heat with the heat medium in the heat medium passage (40).
- the second refrigerants of all the second refrigerant circuits (60) can exchange heat with the heat medium in the heat medium passage (40).
- the first refrigerant circuit (20) performs the refrigeration cycle to heat the heat medium in the heat medium passage (40), and the second refrigerant circuit (60) serves as a heat source for the second refrigerant circuit (60).
- hot water for hot water supply is generated.
- the thermal energy utilization device (45) only the first refrigerant circuit (20) needs to be operated. There is no need to operate to produce hot water for hot water supply. Therefore, according to the present invention, it is not necessary to generate high-temperature hot water just to obtain a medium-temperature heat medium as in the prior art, and wasteful consumption of energy such as electric power can be suppressed.
- the operation state of the first refrigerant circuit (20) when the demand for the medium temperature heat medium or the required value of the heat medium temperature changes, the operation state of the first refrigerant circuit (20) is changed. If the required amount of hot water supply or hot water temperature changes by adjusting the heating amount for the heat medium, the operating state of the second refrigerant circuit (60) may be changed to adjust the heating amount for water. Therefore, according to the present invention, the operation of the first refrigerant circuit (20) and the second refrigerant circuit (60) can be individually controlled to appropriately cope with the demand for the medium temperature heat medium and the demand for hot water supply. This makes it possible to realize a hot water supply device (10) that can be easily controlled according to load fluctuations.
- the second invention an operation of supplying the heat medium after passing through the heat utilization device (45) to the evaporator (50) of the second refrigerant circuit (60) is possible.
- the heat medium that has dissipated heat to the refrigerant and the temperature further decreases, and the first refrigerant in the first refrigerant circuit (20) exchanges heat.
- the enthalpy of the first refrigerant exchanged with the heat medium can be reduced, thereby increasing the amount of heat that the first refrigerant absorbs heat, such as outside air, and the refrigeration in the first refrigerant circuit (20).
- Cycle COP coefficient of performance
- the operation of distributing the heat medium heated by heat exchange with the first refrigerant to the heat utilization device (45) and the evaporator (50) of the second refrigerant circuit (60) is performed.
- the second refrigerant of the second refrigerant circuit (60) absorbs heat during the operation.
- the second refrigerant in the second refrigerant circuit (60) is heat-exchanged with a heat medium having the highest possible temperature. Therefore, according to the present invention, the low pressure of the refrigeration cycle in the second refrigerant circuit (60) can be set higher, and the power required for compression of the second refrigerant can be reduced to reduce the refrigeration cycle.
- COP can be reduced.
- the hot water supply device (10) is provided with one or a plurality of one or both of the first refrigerant circuit (20) and the second refrigerant circuit (60), and these are provided as one heat medium passage (40). Connected to.
- first refrigerant circuits (20) when a plurality of first refrigerant circuits (20) are provided, another first refrigerant circuit (when the heating amount to the heat medium is insufficient only by operation of one first refrigerant circuit (20)). It is also possible to drive 20). Therefore, according to the present invention, it is possible to realize a working water heater (10) that can flexibly cope with load fluctuations, good usability, and a hot water supply device (10).
- FIG. 1 is a piping system diagram showing a schematic configuration of a hot water supply apparatus and an operation during cooling operation in an embodiment.
- FIG. 2 is a schematic diagram of a hot water supply apparatus according to the embodiment and a piping system diagram showing an operation during heating operation.
- FIG. 3 is a piping system diagram showing a schematic configuration of a hot water supply apparatus in Modification 1 of the embodiment.
- FIG. 4 is a piping system diagram showing a schematic configuration of a hot water supply apparatus in Modification 2 of the embodiment. Explanation of symbols
- the hot water supply device (10) of the present embodiment includes a heat source unit (11), an indoor unit (12) for air conditioning, a hot water hot water supply unit (13), and a hot water storage unit (14). It is configured by.
- the hot water supply device (10) includes a first refrigerant circuit (20), an intermediate temperature water circuit (40), a second refrigerant circuit (60), and a high temperature water circuit (80).
- the first refrigerant circuit (20) is formed across the heat source unit (11) and the indoor unit (12).
- the first refrigerant circuit (20) includes a first compressor (21), a four-way switching valve (22), an outdoor heat exchanger (23), an indoor heat exchanger (24), and a first heat exchange.
- a vessel (30) and two electric expansion valves (25, 26) are provided. Of these, only indoor heat exchange (24) is stored in the indoor unit (12), and the rest is stored in the heat source unit (11).
- the first refrigerant circuit (20) is filled with the first refrigerant.
- hydrocarbon refrigerants such as methane and propane may be used in addition to so-called freon refrigerants such as R407C and R410A.
- Both the outdoor heat exchange ⁇ 23 (23) and the indoor heat exchange ⁇ (24) are constituted by cross-fin plate 'and' tube heat exchange ⁇ .
- Outdoor heat exchange (23) causes the first refrigerant to exchange heat with outdoor air.
- the indoor heat exchanger (24) exchanges heat between the first refrigerant and room air. This indoor heat exchange (24) constitutes a heat exchange for air conditioning.
- the first heat exchanger (30) is constituted by a so-called plate heat exchanger ⁇ , and includes a plurality of first flow paths (31) and second flow paths (32) separated from each other! /, The
- the four-way switching valve (22) has a first state (state shown in Fig. 1) in which the first port and the third port communicate with each other and the second port and the fourth port communicate with each other; The first port and the fourth port communicate with each other, and the second port and the third port communicate with each other.
- the second state (the state shown in FIG. 2) can be switched.
- the first compressor (21) has a discharge side on the first port of the four-way switching valve (22) and a suction side on the second port of the four-way switching valve (22). Are connected to each.
- One end of the outdoor heat exchanger (23) is connected to the third port of the four-way switching valve.
- the other end of the outdoor heat exchanger (23) is connected to both one end of the first electric expansion valve (25) and one end of the second electric expansion valve (26).
- the other end of the first electric expansion valve (25) is connected to one end of the indoor heat exchanger (24).
- the other end of the indoor heat exchanger (24) is connected to the fourth port of the four-way switching valve (22).
- the other end of the second electric expansion valve (26) is connected to one end of the first flow path (31) in the first heat exchange (30).
- the other end of the first flow path (31) in the first heat exchanger (30) is connected between the discharge side of the first compressor (21) and the four-way switching valve (22).
- the medium hot water circuit (40) is formed across the heat source unit (11) and the high temperature water hot water supply unit (13).
- This medium hot water circuit (40) has a first heat exchanger (30), a pump (41) and a three-way control valve (42 ) And second heat exchange (50). Of these, only the second heat exchanger (50) is stored in the hot water hot water supply unit (13), and the rest is stored in the heat source unit (11).
- the intermediate hot water circuit (40) is connected to a floor heating radiator (45) serving as a thermal utilization device.
- the intermediate hot water circuit (40) constitutes a heat medium passage for circulating water (heat medium water) filled as a heat medium between the floor heating radiator (45).
- the heat medium filled in the intermediate temperature water circuit (40) is not limited to water, and brine such as an aqueous solution of ethylene glycol may be used as the heat medium.
- brine such as an aqueous solution of ethylene glycol
- what is connected to the intermediate hot water circuit (40) as a device for using heat is not limited to the radiator for floor heating (45).
- a hot water heater or a bathroom dryer that heats the air using heat transfer water may be connected to the intermediate hot water circuit (40) as a device using heat.
- the three-way control valve (42) sends the fluid flowing into the first port to one of the second port and the third port, and the fluid flowing into the first port into the second port. It is possible to send to both the third port and the third port.
- the ratio of the fluid flowing into the first port that is directed toward the second port and that directed toward the third port is variable.
- the second heat exchange (50) is constituted by a so-called plate-type heat exchange ⁇ , and includes a plurality of first flow paths (51) and second flow paths (52) separated from each other! /, The
- the discharge side of the pump (41) is connected to the first port of the three-way control valve (42).
- the first flow path (51) of the second heat exchange (50) has one end connected to the second port of the three-way control valve (42) and the other end connected to the second flow path of the first heat exchanger (30). (32) is connected to one end of each.
- the other end of the second flow path (32) of the first heat exchange (30) is connected to the suction side of the pump (41).
- the third port of the three-way control valve (42) is connected to one end of the floor heating radiator (45).
- the other end of the floor heating radiator (45) is connected to a pipe connecting the first flow path (51) of the second heat exchange (50) and the second flow path (32) of the first heat exchange (30).
- the second refrigerant circuit (60) is housed in the high-temperature hot water supply unit (13).
- the second refrigerant circuit (60) is provided with a second compressor (61), a third heat exchanger (70), an electric expansion valve (62), and a second heat exchanger (50). ing.
- the second refrigerant circuit (60) is filled with the second refrigerant.
- carbon dioxide (CO 2) is used as the second refrigerant.
- the third heat exchange (70) is constituted by so-called plate heat exchange ⁇ A plurality of divided first flow paths (71) and second flow paths (72) are provided.
- the discharge side of the second compressor (61) is connected to one end of the first flow path (71) of the third heat exchanger (70).
- the other end of the first flow path (71) of the third heat exchanger (70) is connected to one end of the second flow path (52) of the second heat exchanger (50) via the electric expansion valve (62). It has been.
- the other end of the second flow path (52) of the second heat exchanger (50) is connected to the suction side of the second compressor (61).
- the high-temperature water circuit (80) is formed across the high-temperature water hot water supply unit (13) and the hot water storage unit (14).
- the hot water circuit (80) includes a hot water storage tank (81), a pump (82), a third heat exchanger (70), and a mixing valve (83).
- the mixing valve (83) is configured to mix the fluid that has flowed into the first port and the fluid that has flowed into the second port, and to send the mixed fluid from the third port. Further, the mixing valve (83) can change the flow rate ratio between the fluid flowing into the first port and the fluid flowing into the second port.
- the hot water storage tank (81) is formed in the shape of a vertically long, cylindrical sealed container!
- the discharge side of the pump (82) is the second flow path of the third heat exchanger (70).
- the other end of the second flow path (72) of the third heat exchanger (70) is connected to the first port of the mixing valve (83).
- the second port of the mixing valve (83) is connected to the suction side of the pump (82).
- the third port of the mixing valve (83) is connected to a hot water supply pipe (85) extending to the use side such as a kitchen, a wash basin or a bath.
- the bottom of the hot water storage tank (81) is connected to the pipe connecting the mixing valve (83) and the pump (82), and the top is connected to the second flow path (72) of the third heat exchanger (70) and the mixing valve (83). It is connected to each connecting pipe.
- the water to which an external force is also supplied into the high-temperature water circuit (80) is introduced near the suction side of the pump (82).
- the hot water supply device (10) The operation of the hot water supply device (10) will be described.
- this hot water supply device (10) it is possible to switch between a cooling operation in which the indoor unit (12) cools the room and a heating operation in which the indoor unit (12) heats the room.
- the four-way selector valve (22) is set to the first state.
- the opening degree of the first electric expansion valve (25) is appropriate.
- the opening of the second electric expansion valve (26) is set almost fully open.
- the first compressor (21) is operated in this state, the first refrigerant circulates in the first refrigerant circuit (20) and a refrigeration cycle is performed.
- the outdoor heat exchanger (23) and the first heat exchanger (30) serve as a condenser, and the indoor heat exchanger (24) serves as an evaporator.
- the first refrigerant circuit (20) constitutes a heat pump using indoor air as a heat source.
- a part of the first refrigerant discharged from the first compressor (21) flows into the outdoor heat exchanger (23) through the four-way switching valve (22), and the remaining part is the first refrigerant.
- 1 Flows into the first flow path (31) of the heat exchanger (30).
- the first refrigerant flowing into the outdoor heat exchanger (23) dissipates heat to the outdoor air and condenses.
- the first refrigerant flowing into the first flow path (31) of the first heat exchanger (30) dissipates heat and condenses to the heat transfer medium in the intermediate hot water circuit (40), and then the second electric expansion valve (26 ) And the first refrigerant condensed in the outdoor heat exchanger (23).
- the first refrigerant is decompressed when passing through the first electric expansion valve (25), and then flows into the indoor heat exchanger (24).
- the indoor heat exchanger (24) the inflowing first refrigerant absorbs heat from the indoor air and evaporates, and the indoor air is cooled.
- the first refrigerant evaporated in the indoor heat exchanger (24) passes through the four-way switching valve (22) and then is sucked into the first compressor (21) and compressed.
- the four-way selector valve (22) is set to the second state.
- the opening degrees of the first electric expansion valve (25) and the second electric expansion valve (26) are appropriately adjusted.
- the first compressor (21) is operated in this state, the first refrigerant circulates in the first refrigerant circuit (20) and a refrigeration cycle is performed.
- the indoor heat exchange (24) and the first heat exchange (30) serve as a condenser, and the outdoor heat exchange (23) serves as an evaporator.
- the first refrigerant circuit (20) constitutes a heat pump using outdoor air as a heat source.
- the first refrigerant condensed in the indoor heat exchanger (24) is decompressed when passing through the first electric expansion valve (25), and then the first refrigerant in the first heat exchanger (30).
- the first refrigerant condensed in the flow path (31) is decompressed when passing through the second electric expansion valve (26) and then flows into the outdoor heat exchanger (23).
- the outdoor heat exchanger (23) the inflowing first refrigerant absorbs heat from the outdoor air and evaporates.
- the first refrigerant evaporated in the outdoor heat exchanger (23) is sucked into the first compressor (21) and compressed after passing through the four-way switching valve (22).
- the heat transfer water circulates in the intermediate temperature water circuit (40).
- the heat transfer water flowing into the second flow path (32) of the first heat exchanger (30) is heated by the first refrigerant flowing through the first flow path (31).
- the heat transfer water heated to a medium temperature of about 30 ° C to 60 ° C while passing through the second flow path (32) flows into the three-way control valve (42).
- the three-way control valve (42) is set in a state where the first port communicates with the second and third ports, a part of the medium temperature heat transfer water is heat radiation for floor heating. Flows into the heat exchanger (45), and the remainder flows into the first flow path (51) of the second heat exchanger (50).
- the flow rate of the heat transfer water to the floor heating radiator (45) and the flow rate of the heat transfer water to the second heat exchange (50) The ratio of can be changed. If the three-way control valve (42) is set so that the first port communicates only with the second port, the heat transfer water heated by the first heat exchanger (30) is transferred to the second heat exchanger (50 ) Only supplied. If the three-way control valve (42) is set so that the first port communicates only with the third port, the heat transfer water heated by the first heat exchanger (30) Supplied only to 45).
- the second compressor (61) of the second refrigerant circuit (60) When the second compressor (61) of the second refrigerant circuit (60) is operated, the second refrigerant circulates in the second refrigerant circuit (60) to perform a refrigeration cycle. At that time, in the second refrigerant circuit (60), the third heat exchanger (70) serves as a condenser, and the second heat exchanger (50) serves as an evaporator. In the second refrigerant circuit (60), the high pressure of the refrigeration cycle is set higher than the critical pressure of the second refrigerant. That is, in the second refrigerant circuit (60), a so-called supercritical cycle is performed.
- the second refrigerant circuit (60) constitutes a heat pump using the heat transfer water of the intermediate temperature water circuit (40) as a heat source.
- the second refrigerant discharged from the second compressor (61) is the first flow of the third heat exchanger (70). It flows into the channel (71), dissipates heat to the hot water supply water flowing through the second channel (72), and condenses.
- the second refrigerant condensed in the third heat exchanger (70) is decompressed when passing through the electric expansion valve (62) and then flows into the second flow path (52) of the second heat exchanger (50). .
- the second refrigerant flowing into the second flow path (52) of the second heat exchanger (50) absorbs heat from the heat medium flowing through the first flow path (51) and evaporates.
- the refrigerant evaporated in the second heat exchanger (50) is sucked into the second compressor (61) and compressed.
- Hot water supply water flows through the high temperature water circuit (80).
- the hot water for which the pump (82) force is also discharged flows into the second flow path (72) of the third heat exchanger (70) and is heated by the second refrigerant flowing through the first flow path (71).
- Hot water for hot water heated to about 60 ° C to 90 ° by the third heat exchanger (70) is supplied to the user side through the hot water pipe (85) or stored in the hot water storage tank (81). It is done.
- the mixing valve (83) is operated, the flow rate ratio between the hot water supply water flowing into the first port and the room temperature water flowing into the second port changes, and as a result, the hot water supply from the third port changes.
- the temperature of the hot water flowing into the pipe (85) is adjusted.
- the first refrigerant circuit (20) performs the refrigeration cycle to heat the heat transfer water in the intermediate hot water circuit (40), and the second heat transfer water is used as a heat source.
- the refrigerant circuit (60) heats the hot water supply water to a high temperature of about 60 ° C to 90 ° by performing a refrigeration cycle. For this reason, for example, when no hot water supply is required, but heat medium water needs to be supplied to the floor heating radiator (45), the second refrigerant circuit that only needs to perform the refrigeration cycle with the first refrigerant circuit (20). It is not necessary to heat the hot water supply water to a high temperature by performing a refrigeration cycle in the channel (60). Therefore, according to the hot water supply device (10), there is no need to generate high-temperature water just to obtain a medium-temperature heat medium as in the prior art, and wasteful consumption of electric power can be suppressed.
- the hot water supply device (10) of the present embodiment if the operating capacity of the first compressor (21) is changed, the amount of heat applied to the heat transfer water in the first heat exchanger (30) changes. For this reason, when the demand value of the heat medium water temperature changes, the operation state corresponding to these changes can be realized by the operation control of the first compressor (21). Further, in the hot water supply device (10), if the operating capacity of the second compressor (61) is changed, the amount of heating with respect to the hot water supply water in the third heat exchanger (70) changes. For this reason, the required value for hot water supply and hot water temperature changes. In such a case, the operation state corresponding to these changes can be realized by the operation control of the second compressor (61).
- the first compressor (21) and the second compressor (61) are individually operated and controlled, so that the demand for medium temperature heat transfer water and the demand for hot water supply are increased. It is possible to respond appropriately. Therefore, according to the present embodiment, it is possible to realize a hot water supply device (10) in which operation control according to load fluctuation is easy.
- the heat transfer water heated by heat exchange with the first refrigerant is distributed to the floor heating radiator (45) and the second heat exchanger (50).
- the second refrigerant in the medium temperature heat medium hydraulic power second refrigerant circuit (60) that has flowed out the first heat exchange (30) force absorbs heat. That is, in the hot water supply device (10), the second refrigerant in the second refrigerant circuit (60) exchanges heat with the heat transfer water having the highest temperature. Therefore, according to this embodiment, the low pressure of the refrigeration cycle in the second refrigerant circuit (60) can be set higher, and the power consumption of the second compressor (61) can be reduced to reduce the power consumption of the refrigeration cycle. COP can be reduced.
- the hot water supply device (10) of the present embodiment it is possible to cut off the supply of heat transfer water to the floor heating radiator (45), which does not require operation. Therefore, it is possible to avoid heat dissipation loss of the heat transfer water in the floor heating radiator (45) that does not require operation.
- the hot water supply device (10) of the present embodiment it is possible to perform indoor heating and cooling using the first refrigerant circuit (20). Therefore, the installation space for the equipment can be reduced compared to the case where the hot water supply device (10) and the air conditioner are individually installed.
- the heat exchange in which the refrigerant exchanges heat with water is smaller than the heat exchanger in which the refrigerant exchanges heat with air.
- the second refrigerant circuit (60) for heating the hot water supply water in the high temperature water circuit (80) uses the heat transfer water of the intermediate hot water circuit (40).
- the second heat exchanger (50), which constitutes the heat pump as the heat source and serves as the evaporator of the second refrigerant circuit (60), is a plate type heat exchanger that exchanges heat between the second refrigerant and the heat transfer medium.
- the hot water supply device (10) can be significantly reduced in size.
- the configuration of the intermediate hot water circuit (40) may be changed! /.
- a floor heating radiator (45) is connected to a pipe connecting the three-way control valve (42) and the second heat exchanger (50) in the intermediate hot water circuit (40). ) Can be connected at the other end! / ⁇ .
- the heat transfer water radiated by the floor heating radiator (45) passes through the first flow path (51) of the second heat exchanger (50) and then passes through the first heat flow path (51). 1 Flows into the second flow path (32) of the heat exchanger (30)
- the hot water supply device (10) of the present modification it is possible to perform an operation of supplying the heat transfer water after passing through the floor heating radiator (45) to the second heat exchanger (50).
- the heat transfer water radiated by the floor heating radiator (45) further dissipates heat to the second refrigerant in the second heat exchanger (50), and the first heat exchange (30) generates the first heat. It will exchange heat with the refrigerant.
- the enthalpy of the first refrigerant at the outlet of the first flow path (31) of the first heat exchanger (30) can be reduced, thereby increasing the amount of heat that the first refrigerant absorbs from a heat source such as outside air. it can. Therefore, according to this modification, the COP (coefficient of performance) of the refrigeration cycle in the first refrigerant circuit (20) can be improved.
- the configuration of the first refrigerant circuit (20) may be changed! /.
- the indoor heat exchanger (24) and the four-way switching valve (22) may be omitted from the first refrigerant circuit (20).
- the first compressor (21) has a discharge side on the first flow path (31) of the first heat exchanger (30) and an intake side on the outdoor heat exchanger ( 23) is connected to each.
- a plurality of first refrigerant circuits (20) may be provided.
- a plurality of first heat exchangers (30) are connected in series or in parallel to the intermediate temperature water circuit (40), and the first refrigerant is connected to the first flow path (31) of each first heat exchanger (30).
- Circuits (20) are connected one by one. Even if only one first refrigerant circuit (20) is operated, the amount of heating to the heat transfer medium is insufficient. Can be compensated. Therefore, according to this modification, it is possible to flexibly cope with load fluctuations.
- the hot water supply device (10) can be realized.
- a plurality of second refrigerant circuits (60) may be provided.
- a plurality of second heat exchangers (50) are connected in series or in parallel to the intermediate temperature water circuit (40), and the second flow path (52) of each second heat exchanger (50) is connected to the second flow path (52).
- One refrigerant circuit (60) is connected.
- the high temperature water hot water supply unit (13) and the hot water storage unit (14) may be integrated. That is, the second refrigerant circuit (60) and the high-temperature water circuit (80) may be housed in one casing. By integrating the high-temperature water hot water supply unit (13) and the hot water storage unit (14) in this way, the installation area of the hot water supply device (10) can be reduced.
- the present invention is useful for a hot water supply apparatus.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP05765228A EP1780476A4 (en) | 2004-07-01 | 2005-07-01 | HOT WATER SUPPLY DEVICE |
US11/630,617 US7640763B2 (en) | 2004-07-01 | 2005-07-01 | Hot water supply system |
AU2005258416A AU2005258416B2 (en) | 2004-07-01 | 2005-07-01 | Hot water supply system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-195154 | 2004-07-01 | ||
JP2004195154A JP4599910B2 (ja) | 2004-07-01 | 2004-07-01 | 給湯装置 |
Publications (1)
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WO2006004046A1 true WO2006004046A1 (ja) | 2006-01-12 |
Family
ID=35782850
Family Applications (1)
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PCT/JP2005/012218 WO2006004046A1 (ja) | 2004-07-01 | 2005-07-01 | 給湯装置 |
Country Status (7)
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US (1) | US7640763B2 (ja) |
EP (1) | EP1780476A4 (ja) |
JP (1) | JP4599910B2 (ja) |
KR (1) | KR100810870B1 (ja) |
CN (1) | CN100465542C (ja) |
AU (1) | AU2005258416B2 (ja) |
WO (1) | WO2006004046A1 (ja) |
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JP4062930B2 (ja) * | 2002-02-13 | 2008-03-19 | 株式会社デンソー | 多機能給湯装置 |
CN1228588C (zh) * | 2002-04-20 | 2005-11-23 | 浙江国祥制冷工业股份有限公司 | 复合式风冷热泵机组 |
KR100471441B1 (ko) * | 2002-07-03 | 2005-03-08 | 엘지전자 주식회사 | 2개의 압축기를 적용한 공기조화기의 압축기 동작방법 |
JP2004156806A (ja) * | 2002-11-05 | 2004-06-03 | Sanyo Electric Co Ltd | 温冷熱システム |
JP3668785B2 (ja) * | 2003-10-09 | 2005-07-06 | ダイキン工業株式会社 | 空気調和装置 |
KR100769057B1 (ko) * | 2006-02-24 | 2007-10-22 | 진주환 | 히트 펌프 시스템 |
-
2004
- 2004-07-01 JP JP2004195154A patent/JP4599910B2/ja not_active Expired - Fee Related
-
2005
- 2005-07-01 CN CNB2005800191826A patent/CN100465542C/zh not_active Expired - Fee Related
- 2005-07-01 AU AU2005258416A patent/AU2005258416B2/en not_active Ceased
- 2005-07-01 EP EP05765228A patent/EP1780476A4/en not_active Withdrawn
- 2005-07-01 US US11/630,617 patent/US7640763B2/en not_active Expired - Fee Related
- 2005-07-01 KR KR1020077002344A patent/KR100810870B1/ko not_active IP Right Cessation
- 2005-07-01 WO PCT/JP2005/012218 patent/WO2006004046A1/ja active Application Filing
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JPH04263758A (ja) * | 1991-02-18 | 1992-09-18 | Kansai Electric Power Co Inc:The | ヒートポンプ式給湯装置 |
JP2003222395A (ja) * | 2002-02-01 | 2003-08-08 | Denso Corp | 多機能給湯装置 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2246649B1 (en) | 2008-02-29 | 2017-07-19 | Daikin Industries, Ltd. | Refrigerating apparatus |
EP2246649B2 (en) † | 2008-02-29 | 2023-10-25 | Daikin Industries, Ltd. | Refrigerating apparatus |
US20110296861A1 (en) * | 2009-02-24 | 2011-12-08 | Daikin Industries, Ltd. | Heat pump system |
US9581361B2 (en) * | 2009-02-24 | 2017-02-28 | Daikin Industries, Ltd. | Heat pump system |
US20110283726A1 (en) * | 2010-05-20 | 2011-11-24 | Lg Electronics Inc. | Hot water supply device associated with heat pump and method for controlling the same |
Also Published As
Publication number | Publication date |
---|---|
CN1969154A (zh) | 2007-05-23 |
JP2006017376A (ja) | 2006-01-19 |
KR20070028605A (ko) | 2007-03-12 |
US7640763B2 (en) | 2010-01-05 |
AU2005258416B2 (en) | 2008-06-26 |
EP1780476A4 (en) | 2013-03-06 |
AU2005258416A1 (en) | 2006-01-12 |
CN100465542C (zh) | 2009-03-04 |
KR100810870B1 (ko) | 2008-03-07 |
EP1780476A1 (en) | 2007-05-02 |
US20090211282A1 (en) | 2009-08-27 |
JP4599910B2 (ja) | 2010-12-15 |
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