WO2011104878A1 - 三流体熱交換器およびそれを用いた空調給湯システム - Google Patents
三流体熱交換器およびそれを用いた空調給湯システム Download PDFInfo
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- WO2011104878A1 WO2011104878A1 PCT/JP2010/053141 JP2010053141W WO2011104878A1 WO 2011104878 A1 WO2011104878 A1 WO 2011104878A1 JP 2010053141 W JP2010053141 W JP 2010053141W WO 2011104878 A1 WO2011104878 A1 WO 2011104878A1
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- Prior art keywords
- hot water
- refrigerant
- heat exchanger
- water supply
- air
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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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
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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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0041—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form
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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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
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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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
Definitions
- the present invention relates to a three-fluid heat exchanger and an air conditioning and hot water supply system using the same, and more particularly to an air temperature adjusting refrigerant circuit that switches between cooling and heating, a hot water supply refrigerant circuit that stores hot water, and a heat storage tank.
- the present invention relates to a three-fluid heat exchanger suitable for an air-conditioning hot-water supply system in which a hot water refrigerant circuit used is connected via a three-fluid heat exchanger to form a refrigeration cycle, and an air-conditioning hot-water supply system using the same.
- Patent Literature 1 and Patent Literature 2 disclose an air conditioning hot water supply system that combines a hot water supply refrigerant circuit and an air temperature adjustment refrigerant circuit.
- the air conditioning hot water supply system includes a hot water supply refrigerant circuit, an air temperature adjustment refrigerant circuit, and an air temperature adjustment cold / hot water circuit, and the hot water supply refrigerant circuit and the air temperature adjustment refrigerant circuit include cold / hot water for air temperature adjustment. It is a device that exchanges heat through a water heat exchanger provided in the circuit.
- the water heat exchanger disclosed in Patent Documents 1 and 2 is composed of an outer tube and a plurality of inner tubes, and a predetermined number of inner tubes are used for an air temperature adjusting refrigerant circuit, and the remaining inner tubes are used as a hot water supply refrigerant circuit.
- This is a multi-tube heat exchanger that circulates cold / hot water of a cold / hot water circuit for adjusting the air temperature through the gap between the outer pipe and the inner pipe.
- the hot water supply refrigerant circuit and the air temperature adjusting refrigerant circuit are arranged in a heat exchange relationship via cold / hot water, the evaporation pressure of the hot water supply refrigerant circuit is the water heat source.
- Patent Documents 1 and 2 describe that high-temperature hot water can be efficiently produced without being lowered as in the case of an air heat source, and that air conditioning can also be performed.
- Patent Document 3 as a technique for suppressing an increase in the installation area of the hot water supply heat exchanger, the heat transfer area is maintained by spirally winding the multi-tube heat exchanger. A configuration for reducing the installation area is disclosed. Patent Document 3 describes that, according to this spirally wound heat exchanger, the heat exchanger can be made compact even when the length of the heat transfer tube is extended.
- the multi-tube heat exchanger as disclosed in Patent Document 3 forms an inner pipe composed of two types, an inner pipe through which the first fluid flows and an inner pipe through which the second fluid flows.
- the first fluid and the second fluid are Since heat is exchanged via the third fluid, the heat transfer performance is reduced.
- the inner pipe In order to improve the heat exchange performance between the first fluid and the second fluid, it is conceivable to join the inner pipe through which the first fluid and the second fluid circulate.
- mechanical joining methods eg, joining by screwing or banding
- metallurgical joining eg, joining by brazing or pressure welding, which is a kind of welding.
- the brazing is also called brazing or brazing, but is hereinafter referred to as brazing.
- this joining structure is applied to the downsizing technique disclosed in Patent Document 3, the inner pipe is cured by joining the inner pipes, and the multi-tube heat exchanger is spirally formed. It is difficult to turn and downsize.
- An object of the present invention is to improve the energy saving performance by configuring an air conditioning and hot water supply system using natural energy, and to achieve heat transfer performance of a heat exchanger between three fluids used in an air conditioning cycle, a hot water supply cycle, and a natural energy cycle.
- An object of the present invention is to provide a heat exchanger and an air-conditioning hot-water supply system using the heat exchanger that are miniaturized.
- the present invention mainly adopts the following configuration.
- the air conditioner that flows through the respective refrigerant circuits of an air conditioning refrigerant circuit in which an air conditioning refrigerant circulates, a hot water supply refrigerant circuit in which a hot water supply refrigerant circulates, and a hot water refrigerant circuit in which hot water refrigerant stored using natural energy circulates
- a three-fluid heat exchanger that exchanges heat between the refrigerant for hot water, the refrigerant for hot water supply, and the hot water refrigerant, wherein the air-conditioning refrigerant and the hot water supply refrigerant flow through the three-fluid heat exchanger, respectively.
- a plurality of inner pipes and an outer shell that encloses the plurality of inner pipes and through which the hot water refrigerant flows, and inner pipes that are joined with different refrigerants flowing are connected to the direct portion in the outer shell.
- a partition plate that forms a planar meandering shape composed of a bent portion and partitions each meandering portion of the meandering shape in the inner tube is disposed in the outer shell in parallel with the perpendicular portion of the inner tube and is rectangular Forming the portion and bending the inner pipe
- the opening portion of the partition plate is provided with an opening in a substantially central portion by a dimension that allows the inner tube to pass through in the longitudinal direction of the rectangular portion, and the inner tube is connected to an inner edge portion of the opening portion.
- it is fixedly arranged at a substantially central portion in the vertical direction on the inlet side and outlet side of the outer shell through which the inner pipe passes.
- the plurality of inner pipes through which the air-conditioning refrigerant and the hot water supply refrigerant respectively flow are formed from two inner pipes, and the two inner pipes are overlapped and joined together.
- the configuration is as follows. Further, the plurality of inner pipes through which the air conditioning refrigerant and the hot water supply refrigerant respectively flow are formed from two inner pipes, and the two inner pipes are arranged and joined on a horizontal plane, and the inner pipe is bent. In the portion, the inner side of the inner tube having a large bending diameter is joined to the outer side of the inner tube having a small bending diameter. Further, the outer shell forms a stainless steel box shape, and the hot water refrigerant flows through the outer shell partitioned by the partition plate along the axial direction of the inner tube.
- the outer shell has a curved structure made of resin, and the curved structure is formed at both ends of the outer shell where the flow direction of the hot water refrigerant flowing in the outer shell is reversed.
- the flow of the hot water refrigerant is guided along the bent portion of the inner pipe.
- a cross section of the outer shell perpendicular to the axial direction of the direct portion of the inner tube is formed in a substantially circular tube shape.
- the outer shell and the partition plate are integrally formed of resin.
- An air conditioning system having the air conditioning refrigerant circuit, a hot water supply system having the hot water supply refrigerant circuit, and a natural energy utilization heat storage system having the hot water refrigerant circuit, each of which uses the above-described three-fluid heat exchanger.
- the air-conditioning hot-water supply system provided with these is the object of the present invention.
- natural energy such as solar heat and geothermal heat
- the energy saving performance of the air conditioning hot water supply system can be further enhanced.
- the minimum bending radius is determined by the diameter of the outer tube, whereas according to the present invention, the minimum bending radius is determined by the diameter of the inner tube. Therefore, it is possible to reduce the size of the three-fluid heat exchanger while maintaining the heat transfer performance as compared with the prior art.
- a three-fluid heat exchanger according to an embodiment of the present invention and an air-conditioning hot-water supply system using the same will be described in detail below with reference to the drawings.
- the outline of the air-conditioning hot water supply system using natural energy according to the embodiment of the present invention will be described, and then the three-fluid heat exchanger used in the air conditioning hot water supply system using natural energy according to the present embodiment will be described.
- the structure, function, and effect will be described.
- FIG. 1 is a system diagram showing an overall configuration of an air conditioning and hot water supply system according to an embodiment of the present invention.
- the basic configuration of this air conditioning and hot water supply system is mainly composed of an air conditioning compressor 21, a four-way valve 22, a three-fluid heat exchanger (heat recovery heat exchanger) 23, an air conditioning side heat source side heat exchanger 24, and an expansion valve 27.
- An air conditioning system comprising an air conditioning use side heat exchanger 28, and a hot water supply compressor 41, a hot water use side heat exchanger 42, an expansion valve 43, a three-fluid heat exchanger 23, a hot water source heat source side heat exchanger.
- a hot water storage system consisting mainly of a tap water supply port 78, a hot water storage tank 70, a hot water use side heat exchanger 42, and a hot water supply port 79, and mainly a solar heat collector 4, solar heat exchange.
- a solar heat collecting system comprising a heat exchanger 91, mainly a tap water supply port 78, a heat storage tank 50, intermediate hot water pipes 52 and 53, a three-fluid heat exchanger 23, a solar heat exchanger 91, a hot water remaining heat heat exchanger 92, Hot water supply port 7
- a thermal storage system consisting mainly includes the air-conditioning use-side heat exchanger 28, the hot water supply remaining heat heat exchanger 92, the hot and cold water system for a room air conditioner comprising the indoor heat exchanger 61, the.
- the air conditioning and hot water supply system includes an air conditioning refrigerant circuit 5 that switches between a cooling operation and a heating operation, a hot water supply refrigerant circuit 6 that supplies hot water, and an air conditioning Heat exchange with the refrigerant circulating in the refrigerant circuit 5 and the hot water supply refrigerant circuit 6 is carried out to circulate the water that has stored hot or cold heat, and heat exchange with the refrigerant circuit 5 for air conditioning.
- Air-conditioning cold / hot water circulation circuit 8 that performs air conditioning indoors
- hot-water supply circuit 9 that supplies hot water by exchanging heat with the hot-water supply refrigerant circuit 6, and heat transport that stores solar heat collected by the solar heat collector 4
- a heat medium circulation circuit 10 for collecting solar heat for circulating the medium a hot water supply path 11 for supplying hot water in the hot water supply circuit 9 to the outside, and a heat medium circulation circuit 10 for collecting solar heat to exchange heat
- a ring circuit 8 and the hot water preheat hot water circulation circuit 12 for performing heat exchange, and a.
- the air-conditioning hot-water supply system which concerns on this embodiment has the heat pump unit 1 arrange
- the air conditioning and hot water supply system can form operation patterns 1 to 5 based on operation control by the control device 1a, and the outline of these operation patterns will be described below. .
- the air-conditioning cycle is a compression-type cooling operation
- the air-conditioning heat source side heat exchanger 24 radiates heat to the outside air
- the three-fluid heat exchanger 23 uses the air-conditioning pipe 23a for hot water supply.
- Heat is dissipated to both the pipe 23b and the heat storage intermediate hot water pipe 23c, and the air-conditioning use-side divided heat exchangers 28a and 28b absorb heat from the indoor air-conditioning cold / hot water circulation circuit 8 and cool the room by the heat absorption.
- the hot water supply cycle is a compression hot water supply operation
- the hot water supply heat source side exchanger 44 absorbs heat from the outside air
- the hot water supply pipe 23b is connected to the air conditioning pipe 23a. It absorbs heat and promotes vaporization of the hot water supply refrigerant
- the hot water supply side heat exchanger 42 radiates heat to the hot water supply water to the hot water storage tank 70.
- the air conditioning cycle is a compression heating operation
- the air-conditioning heat source side heat exchanger 24 absorbs heat from the outside air
- the three-fluid heat exchanger 23 stores the air-conditioning pipe 23a in the middle of heat storage. Heat is absorbed from the hot water pipe 23c, and the use side divided heat exchangers 28a and 28b for air conditioning dissipate heat to the cold / hot water circulation circuit 8 for indoor air conditioning to heat the room.
- the hot water supply cycle is a compression hot water supply operation
- the hot water supply heat source side exchanger 44 absorbs heat from the outside air
- the hot water supply pipe 23b is a heat storage intermediate hot water pipe 23c.
- the hot water supply side heat exchanger 42 radiates heat to the hot water in the hot water supply pipe 72 to the hot water storage tank 70.
- the cold / warm water for air conditioning in the cold / hot water circulation circuit 8 for indoor air conditioning which has absorbed heat from the use side divided heat exchangers 28a and 28b for air conditioning, dissipates heat to the hot water in the hot / cold hot water circulation circuit 12 in the hot water / remaining heat heat exchanger 92. The use is further promoted.
- the air conditioning cycle is a combined operation of the compression cooling operation and the natural circulation cooling operation, and the air conditioning compressed by the air conditioning compressor 21 in the case of the compression cooling operation.
- the medium passes through the expansion valve 27b, and the air-conditioning use side heat exchanger 28a absorbs heat from the indoor air-conditioning cold / hot water circulation circuit 8 to cool the room, and the air-conditioning compressor 21 is used in the case of natural circulation cooling operation.
- the air conditioning medium passes through the expansion valve 27a from the air conditioning heat source side heat exchanger 24 of the condenser function installed at a high position, and the air conditioning use side divided heat exchanger 28b from the cold / hot water circulation circuit 8 for indoor air conditioning.
- the hot water supply cycle is a compression hot water supply operation
- the hot water supply heat source side exchanger 44 absorbs heat from the outside air
- the three-fluid heat exchanger 23 uses the hot water supply pipe 23b for air conditioning. Heat is absorbed from the pipe 23 a, and the hot water use side heat exchanger 42 radiates heat to the hot water for hot water supply to the hot water storage tank 70. Further, the heat storage intermediate hot water pipe 23c of the three-fluid heat exchanger 23 absorbs heat from the air conditioning pipe 23a, and the heat storage intermediate hot water to the heat storage tank 50 is warmed by the heat absorption.
- the air conditioning cycle is the hot water cycle use and the natural circulation combined operation by the outside air.
- One of the natural circulation combined operation is a condensation installed at a high position.
- the air conditioning medium passes through the expansion valve 27a from the air conditioning heat source side heat exchanger 24 having the air conditioner function, and the air conditioning use side divided heat exchanger 28b absorbs heat from the indoor air conditioning cold / hot water circulation circuit 8 to cool the room. At this time, the air conditioning medium vaporized by the heat absorption returns to the heat source side heat exchanger 24 for air conditioning.
- the three-fluid heat exchanger 23 absorbs heat to the hot water supply pipe 23b of the hot water supply cycle in which the air conditioning pipe 23a is operating, and the air conditioning medium is condensed, and then passes through the expansion valve 27b.
- the use side divided heat exchanger 28a absorbs heat from the cold / hot water circulation circuit 8 for indoor air conditioning and cools the room.
- the hot water supply cycle is a compression hot water supply operation
- the hot water supply heat source side exchanger 44 absorbs heat from the outside air
- the hot water use side heat exchanger 42 serves as a hot water storage tank. Dissipate heat to hot water for hot water supply to 70.
- the natural air cooling operation using the outside air as the operation pattern 5 is an outdoor air natural circulation operation in which the air conditioning cycle does not use the air conditioning compressor 21, and this natural circulation operation is for air conditioning with a condenser function installed at a high position.
- the air conditioning medium passes from the heat source side heat exchanger 24 through the expansion valve 27a, and the air conditioning use side divided heat exchangers 28b and 28a absorb heat from the indoor air conditioning cold / hot water circulation circuit 8 to cool the room. At this time, the air conditioning medium vaporized by the heat absorption returns to the heat source side heat exchanger 24 for air conditioning.
- the hot water supply cycle is a compression hot water supply operation
- the hot water heat source side exchanger 44 absorbs heat from the outside air
- the hot water use side heat exchanger 42 supplies hot water to the hot water storage tank 70. Dissipate heat to hot water.
- the hot water supply pipe 23 b absorbs heat from the heat storage intermediate hot water pipe 23 c and promotes vaporization of the hot water supply refrigerant downstream of the hot water supply expansion valve 43.
- the solar heat exchanger 91 radiates heat from the solar heat collecting pipe 83 to the hot water supply hot water hot water circulation circuit 12, and always uses solar heat effectively. .
- the heat pump unit 1 includes an air conditioning refrigerant circuit 5 and a hot water supply refrigerant circuit 6. Further, a three-fluid heat exchanger 23 is disposed between the air conditioning refrigerant circuit 5 and the hot water supply refrigerant circuit 6. This three-fluid heat exchanger 23 exchanges heat between the three fluids of the refrigerant circulating in the air conditioning refrigerant circuit 5, the refrigerant circulating in the hot water supply refrigerant circuit 6, and the heat medium circulating in the intermediate hot water circulation circuit 7. It has a structure capable of performing the above, and exhibits the function of a heat exchanger for heat recovery.
- the three-fluid heat exchanger 23 includes an air-conditioning refrigerant heat transfer pipe 23a in which the air-conditioning refrigerant flows and an hot-water supply refrigerant in which the hot-water supply refrigerant flows in the outer pipe 23c through which water in the intermediate hot water circulation circuit 7 flows. It is the structure inserted in the state which joined the heat exchanger tube 23b.
- the air conditioning refrigerant circuit 5 is a circuit in which the air conditioning refrigerant circulates, and is sent by an air conditioning compressor 21 that compresses the air conditioning refrigerant, a four-way valve 22 that switches a refrigerant flow path, a three-fluid heat exchanger 23, and a fan 25.
- the air-conditioning heat source side heat exchanger 24 for exchanging heat with the atmospheric air, the first refrigerant tank 26a, the second refrigerant tank 26b, the first expansion valve 27a and the second expansion valve for decompressing the air-conditioning refrigerant.
- the air-conditioning cold / hot water circulation circuit 8 and the air-conditioning use-side heat exchanger 28 for exchanging heat are connected by a refrigerant pipe to form an annular shape.
- the air-conditioning use-side heat exchanger 28 is divided into a first air-conditioning use-side divided heat exchanger 28a and a second air-conditioning use-side divided heat exchanger 28b.
- the first air-conditioning use-side divided heat exchanger 28a and the second air-conditioning use-side divided heat exchanger 28b are connected in series by a refrigerant pipe.
- the air-conditioning refrigerant circuit 5 includes the discharge port 21b, the four-way valve 22, the three-fluid heat exchanger 23, the first refrigerant tank 26a, the first expansion valve 27a, and the second air-conditioning use of the air-conditioning compressor 21.
- An air conditioning refrigerant main circuit formed in an annular shape by connecting the side division heat exchanger 28b, the first air conditioning amount utilization side division heat exchanger 28a, the four-way valve 22, and the suction port 21a of the air conditioning compressor 21 with refrigerant piping in this order. 5a.
- the air conditioning refrigerant circuit 5 includes five air conditioning refrigerant branch circuits provided in the air conditioning refrigerant main circuit 5a.
- the first air conditioning refrigerant branch circuit is an air conditioning refrigerant branch circuit connected in parallel with the three-fluid heat exchanger 23, and specifically, a position between the four-way valve 22 and the three-fluid heat exchanger 23.
- Air-conditioning refrigerant which branches from the branch point I located at the point B and joins at the branch point J between the three-fluid heat exchanger 23 and the first refrigerant tank 26a via the air-conditioning heat source side heat exchanger 24. It is a branch circuit.
- the second air conditioning refrigerant branch circuit is an air conditioning refrigerant branch circuit that bypasses the suction port 21a and the discharge port 21b of the air conditioning compressor 21, and more specifically, the first air conditioning use-side divided heat exchange.
- a three-way valve 34a is provided at the branch point A, and a three-way valve 34b is provided at the branch point B.
- the third air conditioning refrigerant branch circuit branches from a branch point D located between the three-fluid heat exchanger 23 and the branch point J, and sequentially passes through the second refrigerant tank 26b and the second expansion valve 27b.
- the air conditioning refrigerant branch circuit joins at a branch point E located between the first air conditioning use-side split heat exchanger 28a and the second air-conditioning use-side split heat exchanger 28b.
- the branch point D is provided with a three-way valve 34d
- the branch point E is provided with a three-way valve 34e.
- the fourth air conditioning refrigerant branch circuit branches from a branch point H located between the second expansion valve 27b provided in the third air conditioning refrigerant branch circuit and the branch point E, and the air conditioning refrigerant.
- This is an air conditioning refrigerant branch circuit that merges at a branch point G located between the first expansion valve 27a provided in the main circuit 5a and the second air conditioning use-side split heat exchanger 28b.
- the fifth air conditioning refrigerant branch circuit includes a branch point C located between the branch point I and the air source heat source side heat exchanger 24, a second air conditioning use-side divided heat exchanger 28b, and the branch point E. It is the refrigerant
- the three-fluid heat exchanger 23 is configured so that the air conditioning refrigerant heat transfer tube 23a, the hot water supply refrigerant heat transfer tube 23b, and the heat medium heat transfer tube (intermediate hot water refrigerant heat transfer tube) 23c are in thermal contact with each other. It is the heat exchanger for heat recovery constituted integrally.
- the first expansion valve 27a and the second expansion valve 27b reduce the pressure of the air-conditioning refrigerant by adjusting the opening of the valve, and also exchange heat between the three-fluid heat exchanger 23 and the air-conditioning heat source. The flow rate ratio of the air-conditioning refrigerant flowing to the vessel 24 can be adjusted.
- first air-conditioning use-side divided heat exchanger 28a and the second air-conditioning use-side divided heat exchanger 28b are installed at positions lower than the air-conditioning heat source-side heat exchanger 24, and this low position The installation is to form a natural circulation cycle of the air conditioning refrigerant.
- R410a, R134a, HFO1234yf, and HFO1234ze can be used as the air conditioning refrigerant circulating in the air conditioning refrigerant circuit 5.
- the air-conditioning cold / hot water circulation circuit (air-conditioning heat transfer medium circulation circuit) 8 performs heat exchange with the air-conditioning cold / hot water main circuit 8a for exchanging heat with the air-conditioning refrigerant circuit 5 and the hot-water supply hot / cold water circulation circuit 12. It has two circuits, a hot / cold hot water hot / cold water branch circuit 8b.
- the heat transfer medium flowing through the air-conditioning cold / hot water circulation circuit 8 is water (cold water or hot water). However, when used in a cold district, a brine such as ethylene glycol is used instead of water. Also good.
- the air-conditioning cold / hot water main circuit 8a includes an indoor heat exchanger 61, an air-conditioning cold / hot water circulation pump 67, a second air-conditioning use-side divided heat exchanger 28b, This is a circuit formed by annularly connecting one air-conditioning use-side divided heat exchanger 28a by air-conditioning cold / hot water pipes 65a, 65b, 65c.
- the air-conditioning cold / hot water main circuit 8a is provided so that the first air-conditioning cold / hot water branch pipe 66a and the second air-conditioning cold / hot water branch pipe 66b are three-dimensionally crossed (so-called tacking). Yes.
- one end of the 1st air-conditioning cold / hot water branch pipe 66a is connected via the three-way valve 62a and the air-conditioning cold / hot water piping 65a which connects the indoor heat exchanger 61 and the 2nd air-conditioning use side division
- the other end is directly connected to the air-conditioning cold / hot water pipe 65c without a three-way valve.
- one end of the second air conditioning cold / hot water branch pipe 66b is connected via an air conditioning cold / hot water pipe 65c and a three-way valve 62b connecting the indoor heat exchanger 61 and the first air conditioning use-side split heat exchanger 28a.
- the other end is directly connected to the air conditioning cold / hot water pipe 65a without a three-way valve.
- the three-way valve 62a and the three-way valve 62b By operating the three-way valve 62a and the three-way valve 62b, the direction in which water flows to the air-conditioning use-side heat exchangers 28a and 28b can be switched.
- a third air conditioning cold / hot water branch pipe 66c for bypassing the indoor heat exchanger 61 is provided.
- One end of the third air conditioning cold / hot water branch pipe 66c is connected to the air conditioning cold / hot water pipe 65a via a three-way valve 62c, and the other end is directly connected to the air conditioning cold / hot water pipe 65c without a three-way valve. ing.
- the flow rate ratio of the water flowing through the indoor heat exchanger 61 and the water flowing through the third air conditioning cold / hot water branch pipe 66c can be adjusted by the opening degree of the port of the three-way valve 62c.
- the hot / cold hot water branch circuit 8b for hot water supply residual heat connects the outlet of the first air-conditioning use side split heat exchanger 28a to the inlet of the cold / hot water circulation pump 67 for air conditioning by a hot / cold hot water pipe 63 for hot water supply residual heat.
- This is an annular circuit formed by incorporating a hot water supply residual heat exchanger 92 described later into the cold / hot water pipe 63.
- a two-way valve 64 a is attached at a position between the hot water remaining heat heat exchanger 92 and the cold / hot water circulation pump 67 for air conditioning.
- the air conditioning cold / hot water circulation circuit 8 configured as described above, when the two-way valve 64a is closed, the water sent from the air conditioning cold / hot water circulation pump 67 circulates in the air conditioning cold / hot water main circuit 8a. .
- the two-way valve 64a when the two-way valve 64a is open, the water sent from the air conditioning cold / hot water circulation pump 67 not only circulates in the air conditioning cold / hot water main circuit 8a, but also the hot / cold hot water branch circuit 8b. It also circulates inside.
- the hot water received from the first air-conditioning use-side heat exchanger 28a and the second air-conditioning use-side heat exchanger 28b is transferred to the hot water supply residual heat exchanger 92.
- the hot water can be transmitted to the hot water circulating hot water circulation circuit 12.
- the hot water supply refrigerant circuit 6 is a circuit in which the hot water supply refrigerant circulates, and includes a hot water supply compressor 41 that compresses the hot water supply refrigerant, a hot water use side heat exchanger 42 that performs heat exchange with the hot water supply circuit 9, and hot water supply.
- Refrigerant tank 46, hot water supply expansion valve 43 that depressurizes hot water supply refrigerant, three-fluid heat exchanger 23, and hot water supply heat source side heat exchanger 44 that exchanges heat with the air sent by fan 45 are formed by refrigerant piping. It is connected and formed in an annular shape.
- the hot water supply refrigerant circuit 6 includes a discharge port of a hot water supply compressor 41, a hot water supply heat exchanger 42, a hot water supply refrigerant tank 46, a hot water supply expansion valve 43, a three-fluid heat exchanger 23, and a hot water supply compressor 41.
- a hot water supply refrigerant main circuit 6a formed in an annular shape by connecting with refrigerant pipes in the order of the suction port is provided.
- the hot water supply refrigerant branch circuit is an air conditioning refrigerant branch circuit connected in parallel with the three-fluid heat exchanger 23, and specifically, between the hot water supply expansion valve 43 and the three-fluid heat exchanger 23.
- the branch point L is branched from the branch point K at the position, and is located between the three-fluid heat exchanger 23 and the suction port 41a of the hot water supply compressor 41 via the heat source side heat exchanger 44 for hot water supply. It is the refrigerant
- the second hot water supply refrigerant branch circuit 48 is formed by connecting the hot water supply refrigerant tank 46 to the branch point M located between the branch point K and the hot water supply heat source side heat exchanger 45 with a refrigerant pipe. This is a hot water supply refrigerant branch circuit 48.
- the second hot water supply refrigerant circuit 48 is a hot water supply bypass pipe.
- a three-way valve is provided at the branch point M.
- a two-way valve is provided at a position near the outlet of the hot water use side heat exchanger 42, and a two way valve is provided at a position near the outlet of the three-fluid heat exchanger 23.
- a two-way valve is provided at a position near the inlet and outlet of the heat exchanger 44, and a two-way valve is provided at a position between the branch point L and the compressor 41.
- the hot water supply compressor 41 can perform capacity control by inverter control similarly to the air conditioning compressor 21, and the rotation speed is variable from low speed to high speed.
- the hot water use side heat exchanger 42 is configured so that the hot water supply refrigerant heat transfer tube and the hot water supply water heat transfer tube are in contact with each other.
- the hot water supply expansion valve 43 adjusts the opening degree of the valve to reduce the pressure of the hot water supply refrigerant, and the hot water supply refrigerant flows through the three-fluid heat exchanger 23 and the hot water supply heat source side heat exchanger 44.
- the flow rate ratio of the refrigerant can be adjusted.
- R134a, HFO1234yf, and HFO1234ze can be used as the hot water supply refrigerant circulating in the hot water supply refrigerant circuit 6, for example.
- the hot water supply circuit 9 connects the lower part of the hot water storage tank 70 and one end of the hot water use side heat exchanger 42 by a hot water supply pipe 72, and connects the other end of the hot water use side heat exchanger 42 and the hot water storage tank 70. It is a circuit formed in an annular shape by connecting the upper part with a hot water supply pipe 73.
- the hot water supply pipe 72 incorporates a hot water supply circulation pump 71 and a hot water supply flow rate sensor (not shown) for detecting the flow rate of water flowing in the hot water supply circuit 9.
- the water in the hot water storage tank 70 flows into the hot water use side heat exchanger 42 by driving the hot water supply circulation pump 71, and the hot water use side heat exchanger 42 exchanges heat with the hot water supply refrigerant. To warm water and return to the hot water storage tank 70.
- the flow of the hot water supply refrigerant and the flow of water are counterflows.
- the solar heat collecting heat medium circulation circuit 10 is a circuit formed in an annular shape by connecting the solar heat collector 4 and the solar heat exchanger 91 with solar heat collecting pipes 82 and 83.
- the solar heat collection pipe 82 incorporates a solar heat collection circulation pump 85 for circulating a solar heat collection heat medium.
- the heat medium heated by the solar heat collector 4 circulates in the solar heat collection heat medium circulation circuit 10 by driving the solar heat collection circulation pump 85 and flows through the solar heat exchanger 91. Then, heat exchange is performed with the hot water hot water circulation circuit 12.
- the intermediate hot water circulation circuit (heat medium circuit) 7 connects the lower part of the heat storage tank 50 and one end of the three-fluid heat exchanger 23 with an intermediate hot water pipe 52, and the other end of the three-fluid heat exchanger 23
- This is a circuit formed in an annular shape by connecting the heat storage tank 50 with an intermediate hot water pipe 53.
- An intermediate hot water circulation pump 51 is incorporated in the intermediate hot water pipe 52.
- the water in the intermediate hot water circulation circuit 7 flows into the three-fluid heat exchanger 23 by driving the intermediate hot water circulation pump 51, and the air-conditioning refrigerant circuit 5 and the hot water supply are supplied by the three-fluid heat exchanger 23. While exchanging heat with the refrigerant circuit 6, the heat storage tank 50 is returned to.
- the heat storage tank 50 is filled with a heat storage material, and the hot or cold energy obtained from the three-fluid heat exchanger 23 is stored in the heat storage tank 50.
- the heat storage tank 50 is connected to a tap water supply pipe 78 for supplying tap water to the heat storage tank 50.
- the hot water remaining heat / hot water circulation circuit 12 connects the lower part of the heat storage tank 50 and one end of the solar heat exchanger 91 with a hot water remaining heat / hot water pipe 94, the other end of the solar heat exchanger 91, and a heat pump unit. 1 is connected to one end of a hot-water remaining heat heat exchanger 92 that is incorporated in the air-conditioning cold / hot water circulation circuit 8 and exchanges heat with the hot-water remaining heat / hot water pipe 95, and the other end of the hot water remaining heat heat exchanger 92 is connected to the heat storage tank 50.
- This is a circuit formed in an annular shape by connecting the upper part thereof with a pipe 96.
- a circulating hot water supply hot water circulating pump 93 is incorporated in the hot water supply hot water hot water pipe 94.
- the water in the heat storage tank 50 exchanges heat with the solar heat collecting heat medium circulation circuit 10 in the solar heat exchanger 91 by driving the hot water hot water hot water circulation pump 93, and further the hot water hot water heat exchanger.
- the air flows while exchanging heat with the air-conditioning liquid circulation circuit 7, and returns to the heat storage tank 50.
- the hot water supply path 11 is used for supplying the user with hot water supply path 74 for supplying hot water stored in the hot water storage tank 70 to the user, and for supplying intermediate hot water stored in the heat storage tank 50 to the user.
- hot water supply path 74 for supplying hot water stored in the hot water storage tank 70 to the user
- intermediate hot water stored in the heat storage tank 50 there are three paths: an intermediate hot water supply path 75 and a tap water supply path 76 for supplying tap water to the hot water storage tank 70, the heat storage tank 50, and the user.
- the hot water supply path 74 has one end connected to the hot water storage tank 70 and the other end connected to the hot water supply port 79, and one end connected to the hot water storage tank 70 and the other end in the middle of the hot water supply pipe 74a.
- the hot water supply pipe 74b is connected, and a three-way valve 77 is provided at a portion where the hot water supply pipe 74a and the hot water supply pipe 74b merge.
- the intermediate hot water supply path 75 has one end connected to the heat storage tank 50 and the other end connected in the middle of the hot water supply pipe 74a, one end connected to the heat storage tank 50, and the other end supplied with the intermediate hot water supply.
- An intermediate hot water supply pipe 75b connected in the middle of the pipe 75a is provided, and a three-way valve 77 is provided at a portion where the intermediate hot water supply pipe 75a and the hot water supply pipe 74a merge.
- the tap water supply path 76 is connected to the heat storage tank 50 by branching from a tap water supply pipe 76a connected to the hot water storage tank 70 from a tap water supply port 78 to which tap water is supplied, and from the middle of the tap water supply pipe 76a.
- a tap water supply pipe 76b and a tap water supply pipe 76c branched from the middle of the tap water supply pipe 76a and connected in the middle of the hot water supply pipe 74a. It is the structure which provided the three-way valve 77 in the part which joins.
- hot water is stored in the hot water storage tank 70 from the hot water supply port 79 through the hot water supply port 79 by appropriately opening and closing each of the three-way valves 77.
- the control device 1a inputs a remote controller (not shown) and signals from temperature sensors provided in each part of the air conditioning and hot water supply system according to the present embodiment, and based on these signals, the air conditioning compressor 21 and the hot water supply Control is performed on the compressor 41, the four-way valve 22, the expansion valves 27 and 43, and the circulation pumps 51, 67, 71, 85, and 93.
- the air conditioning and hot water supply system uses the above-described three-fluid heat exchanger, so that the air conditioner and the hot water supply machine can be used regardless of the size of the air conditioning / hot water supply load. Is a system that can arbitrarily operate simultaneously with high energy efficiency. Further, since natural energy such as solar heat and geothermal heat can be used as a heat source for air conditioning and hot water supply, the energy saving performance of the air conditioning and hot water supply system can be further enhanced.
- FIG. 2 is a plan view showing the inner tube bending structure and the outer tube structure of the first example relating to the three-fluid heat exchanger according to the embodiment of the present invention.
- FIG. 3 is a cross-sectional view seen from a plane perpendicular to the tube axis direction of the straight part of the inner tube and the outer tube of the first example of the three-fluid heat exchanger according to the present embodiment.
- FIG. 4 is a cross-sectional view of the bent portion of the inner tube and the outer tube of the first example relating to the three-fluid heat exchanger according to the present embodiment as viewed from a plane perpendicular to the tube axis direction.
- FIG. 5 is a sketch showing the entire structure of the bent portion of the inner tube, the outer tube (outer shell), and the partition plate of the first example relating to the three-fluid heat exchanger according to the present embodiment.
- FIG. 6 is a cross-sectional view showing a second example in which two inner pipes are superposed on each other by brazing in a box-shaped outer shell forming an outer shell in the three-fluid heat exchanger according to the present embodiment. It is.
- FIG. 7 is a cross-sectional view showing a third example in which two inner pipes are combined by plane brazing in a box-shaped outer shell forming an outer shell in the three-fluid heat exchanger according to the present embodiment.
- FIG. 8 is a plan view of a fourth example showing a curved structure at the end of the resin outer shell forming the outer pipe and an inner pipe bending structure in the resin outer shell in the three-fluid heat exchanger according to the present embodiment. is there.
- FIG. 9 is a cross-sectional view seen from a plane perpendicular to the tube axis direction of the direct part of the inner tube and outer tube (resin outer shell) of the fourth example of the three-fluid heat exchanger according to the present embodiment.
- 101 is an air conditioning inner pipe
- 102 is a hot water supply inner pipe
- 103 is an outer shell (box-type outer pipe)
- 104 is a partition plate
- 105 is a rectifying plate
- 107 is an air conditioning refrigerant.
- Flow path, 108 is a hot water supply refrigerant path
- 110 is a hot water inlet
- 111 is a hot water outlet
- 113 is an inner pipe direct partial hot water flow path
- 114 is an inner pipe bent partial hot water flow path
- 115 is a large diameter
- 116 is a small diameter
- 117 is a heat insulating material
- 118 is a heat exchanger inlet side
- 119 is a heat exchanger outlet side
- 121 is an inner pipe joint
- 122 is an inner pipe / partition plate joint
- 123 is an inner pipe height holding guide
- 130 is A resin outer shell, 135 is a resin outer shell curved portion
- 136 is a resin outer shell upper and lower flat surface portion
- 137 is a resin outer shell angular curved surface portion.
- FIG. 2 is a plan view showing the inner tube bending structure and the outer tube structure of the first example relating to the three-fluid heat exchanger according to the present embodiment.
- FIG. 3 is a cross-sectional view seen from a plane perpendicular to the tube axis direction of the straight part of the inner tube and the outer tube of the first example of the three-fluid heat exchanger according to the present embodiment.
- FIG. 4 is a cross-sectional view of the bent portion of the inner tube and the outer tube of the first example relating to the three-fluid heat exchanger according to the present embodiment as viewed from a plane perpendicular to the tube axis direction.
- the meandering shape will be described.
- the inner pipes 101 and 102 form a reciprocating path composed of a straight part and a bent part.
- the shape of the path is referred to as a meandering shape and is used in the same meaning hereinafter.
- the above-mentioned perpendicular portion is not necessarily limited to only a linear shape, and includes a portion having a slight non-linear shape. Further, the forward path and the return path of the inner pipe are not limited to parallel paths in a strict sense.
- the meandering bent portion of the inner tube has a shape in which the large diameter 115 and the small diameter 116 are combined.
- the air conditioning inner pipe 101 and the hot water supply inner pipe 102 are joined together by brazing 121 according to the illustrated example of FIG. That is, the air conditioning inner pipe 101 or the hot water supply inner pipe 102 is arranged on a diagonal line, and adjacent inner pipes, that is, the inner pipes 101 and 102 are brazed and joined 121.
- the outermost circumference of the bundled inner pipes may be fixed around the brazed joint 121 by winding a band.
- Two of the inner pipes are the air conditioning inner pipe 101 and the remaining two are the hot water supply inner pipes 102, and the respective inner pipes serve as air conditioning refrigerant and hot water supply refrigerant channels 107 and 108.
- the inner pipe 101 and the inner pipes 102 are brazed and joined 121 in a direct portion of the inner pipes 101 and 102 as shown in FIG. Has been.
- the bent portions of the inner pipes 101 and 102 are brazed and joined 121 so that the inside of the bent portion of the large diameter 115 is in contact with the outside of the bent portion of the small diameter 116 (see FIG. 4).
- the two inner pipes 101 and 102 are circular pipes having the same inner diameter.
- the stainless steel box-shaped outer shell 103 is a natural energy hot water circuit (intermediate hot water refrigerant circuit 7) (see FIG. 1).
- the outer shell 103 is provided with a partition plate 104 and a rectifying plate 105.
- the rectifying plate 105 is provided at corners (left and right ends in the illustrated example of FIG. 2) of the outer shell 103 where the direction of the flow 113 of the hot water refrigerant flowing through the outer shell 103 is reversed, and the flow of the hot water refrigerant is Is guided along.
- the rectifying plates 105 are provided at both ends of the outer shell 103, respectively, to suppress the turbulent flow of the hot water refrigerant. As can be seen from the cross-sectional view shown in FIG.
- the partition plate 104 is provided between the left and right ends along the hot water flow path 113 in contact with the upper wall portion and the lower wall portion of the outer shell 103. As shown, the partition plate 104 is provided with a perforated portion including a space through which the inner pipes 101 and 102 penetrate and a space in which the hot water flow path 114 is formed at the bent portion of the inner pipe.
- the hot water circuit of natural energy flowing through the outer shell 103 is connected to the inner pipe 101 for air conditioning and the hot water supply.
- the flow paths are formed so as to flow around the outer periphery of the refrigerant circuit respectively formed in the inner pipe 102. That is, as shown in FIG. 1, the inner pipe direct partial hot water flow path 113 and the inner pipe bent partial hot water flow path 114 are formed.
- the partition plate 104 has an outer shell 103 such that a flow path of hot water flowing inside the outer shell 103 forms a partial hot water flow path 113 and an inner pipe bent partial hot water flow path 114.
- each end of the partition plate 104 is fixed to the outer shell 103.
- Inner tubes 101 and 102 are inserted into the space formed by the partition plate 104.
- the wall surface of the perforated portion of the partition plate 104 through which the bent portion of the inner pipes 101 and 102 passes (upper and lower side surfaces on the left end side of the perforated portion in the example shown in FIG. 4), and a part of the bent portion of the inner tubes 101 and 102 are joined by brazing to form an inner tube / partition plate joint 122. Further, in FIG.
- the inner tube height holding guide 123 is formed by providing the holed portion of the partition plate 104 at the upper and lower central portions of the partition plate 104, and the inner tubes 101 and 102 are arranged at the height of the outer shell 103. It can be arranged in a substantially central part in the direction.
- the inner pipes 101 and 102 are also joined to the outer shell 103 on the inlet side 118 and the outlet side 119 of the three-fluid heat exchanger. In this way, the inner pipes 101 and 102 are stably fixed in the heat exchanger by being fixed to the outer shell 103 and the partition plate 104.
- the hot water refrigerant that has entered from the hot water inlet 110 of the outer shell 103 flows through the space partitioned by the partition plate 104 that partitions the inside of the outer shell 103 along the tube axis direction of the inner tubes 101 and 102.
- the hot water refrigerant Since the inner pipes 101 and 102 are disposed at a substantially central portion in the partitioned space, the hot water refrigerant achieves a uniform heat transfer performance with respect to the inner pipe.
- the hot water refrigerant goes out from the hot water outlet through the outer shell 103 by reversing the flow direction of the flow path a plurality of times.
- the outer shell 103 is surrounded by a heat insulating material 117 as shown in FIG. 3 in order to suppress heat transfer with the outside air.
- the box-shaped outer tube 103 and the meandering inner tubes 101 and 102 constitute a multi-tube three-fluid heat exchanger.
- the heat exchanger can be downsized while maintaining the performance.
- the inner pipe joint portion 121 is formed after the inner pipes 101 and 102 are bent, the bending radius of the inner pipe can be reduced, which contributes to downsizing.
- the inner pipes 101 and 102 are joined to the partition provisional 104 at their bent portions, they can be fixedly arranged at the center in the outer shell 103, so that the inner pipes 101 and 102 are unevenly distributed around the entire circumference. Heat transfer performance is good because the fluid in the outer shell flows.
- the provision of the rectifying plate 105 has an effect of making it difficult to disturb the flow of the fluid even in the bent portion where the flow direction changes greatly.
- FIG. 6 is a cross-sectional view showing a second example in which two inner pipes are superposed on each other by brazing in a box-shaped outer shell forming an outer shell in the three-fluid heat exchanger according to the present embodiment. .
- Two stainless inner pipes 101 and 102 curved in a meandering manner are accommodated in a stainless steel box-shaped outer shell 103.
- the air conditioning inner pipe 101 is disposed on the upper side
- the hot water supply inner pipe 102 is disposed on the lower side.
- the upper and lower arrangements of the inner pipes may be reversed.
- the two inner pipes are the same type, and the bending diameters of the inner pipes are all the same because the inner pipes 101 and 102 are vertically arranged. That is, since the inner pipes 101 and 102 are arranged one above the other, a small diameter and a large diameter (see the large diameter 115 and the small diameter 116 in FIG. 2) do not occur at the bent portion.
- the outer shell 103 is a natural energy hot water circuit (intermediate hot water refrigerant circuit 7 shown in FIG. 1).
- the outer shell 103 is surrounded by a heat insulating material 117 to suppress heat transfer with the outside air.
- the two inner pipes 101 and 102 are circular pipes having the same inner diameter.
- the shape of the inner tube is the same and the configuration is simple, so that a three-fluid heat exchanger can be easily manufactured at low cost.
- the number of inner pipes is small, the size of the outer shell (outer pipe) that encloses the inner pipe can be reduced, and the three-fluid heat exchanger can be made compact.
- the two inner pipes are described as circular pipes having the same inner diameter.
- the diameters of the inner pipes may be different depending on the type and characteristics of the refrigerant flowing in each inner pipe.
- the bending diameter of the bent portion of the entire inner tube is determined by the bending diameter of the inner tube having the larger diameter, and the inner tube having the smaller diameter may be bent in accordance with the determined bending diameter.
- FIG. 7 is a cross-sectional view showing a third example in which two inner tubes are overlapped in a planar shape by brazing in a box-shaped outer shell forming an outer shell in the three-fluid heat exchanger according to the present embodiment. is there.
- Two stainless steel inner pipes 101 and 102 curved in a meandering manner are accommodated in a stainless steel box-shaped outer shell 103.
- the meandering shape of the inner pipes 101 and 102 is a combination of the straight part of the inner pipe described in FIG. 2 and the bent part composed of the large diameter 115 and the small diameter 116.
- One of the inner pipes is a flow path for air conditioning and the remaining one is a flow path for hot water supply.
- the inner pipes 101 and 102 are large outside the bent part of the small diameter 116.
- the inner side of the bent portion of the diameter 115 is in contact with each other, and is joined to each other by brazing 121 to form a flat plate shape.
- the brazed joint 121 is performed after the bending portion of the inner pipe is bent, the bending diameter can be reduced, and the three-fluid heat exchanger can be reduced in size.
- the outer shell 103 is a natural energy hot water circuit (intermediate hot water refrigerant circuit 7 shown in FIG. 1).
- the two inner pipes 101 and 102 are circular pipes having the same inner diameter.
- the configuration of the inner tube is the same and the configuration is simple, a three-fluid heat exchanger can be easily manufactured at low cost. Since the number of inner pipes is small, the size of the outer shell (outer pipe) that encloses the inner pipe can be reduced, and the three-fluid heat exchanger can be made compact. Further, since the inner pipe is arranged in a planar shape, the height of the three-fluid heat exchanger can be suppressed, and further downsizing can be achieved.
- the two inner pipes are described as circular pipes having the same inner diameter.
- the diameters of the inner pipes may be varied depending on the type and characteristics of the refrigerant flowing in each inner pipe.
- the bending diameter of the bent portion of the entire inner tube is determined by the bending diameter of the inner tube having the larger diameter, and the inner tube having the smaller diameter may be bent in accordance with the determined bending diameter.
- FIG. 8 shows a curved structure 135 at the end of the resin outer shell 130 forming the outer tube in the three-fluid heat exchanger according to this embodiment, and an inner tube bending structure in the resin outer shell 130 of the fourth example. It is a top view.
- FIG. 9 is a cross-sectional view as viewed from a plane perpendicular to the tube axis direction of the orthogonal portions of the inner pipes 101 and 102 and the outer pipe (resin outer shell 130) of the fourth example of the three-fluid heat exchanger according to the present embodiment. It is.
- the inner pipes 101 and 102 have a meandering shape composed of a straight part and a bent part as in FIG. 2, and the outer shell 130 and the partition plate 104 are integrally formed.
- the inner rods 101 and 102 are configured such that the inner side of the inner tube with the large diameter 115 faces the outer side of the inner tube with the small diameter 116 at the bent portion.
- the inner pipes 101 and 102 through which different refrigerants flow are bent at the bent portions, and then joined 121 by brazing so that the inside of the bent portion of the large diameter 115 is in contact with the outside of the bent portion of the small diameter 116.
- two are air conditioning channels 107, and the remaining two are hot water channels 108.
- the left and right ends of the resin outer shell 130 form a resin outer shell curved portion 135.
- the cross section of the perpendicular portion between the left and right end portions of the outer shell 130 includes an upper and lower flat surface portion 136 formed on the upper and lower surfaces of the outer shell, and an outer shell angular curved surface connected to the upper and lower flat surface portion 136. Part 137.
- the two inner pipes composed of the air conditioning inner pipe 101 and the hot water supply inner pipe 102 are circular pipes having the same inner diameter.
- the small diameter portion 116 of the inner tube at the bent portion of the inner tube is fixed to the partition plate 104 by a fixing member as in FIG. 4, and the inner tube 101 is further formed at the inlet side 118 and the outlet side 119 of the resin outer shell 130.
- 102 are fixed by a sealing member, and the inner pipes 101, 102 are evenly transferred by the hot water forming the flow path 113 by the fixing.
- the resin outer shell 130 is a natural energy hot water circuit, and forms an inner pipe direct partial hot water flow path 113 and an inner pipe bent partial hot water flow path 114.
- the outer shell 130 of the present embodiment can be a heat exchanger having excellent heat insulation from the outside air by molding the outer shell 130 with resin.
- the shape of the outer shell can be designed more freely by resin molding. That is, when the outer shell is box-shaped, a rectifying plate is provided because the hot water flow is likely to be disturbed at the corners at both ends of the direct portion of the inner pipe (see the rectifying plate 105 in FIG. 2).
- both end portions can be shaped along the bent shape of the inner tube, and turbulence of the flow of fluid flowing through the outer shell can be suppressed without providing a rectifying plate.
- the cross section of the straight portion of the inner tube in the outer shell 130 constitutes the upper and lower flat surface portions 136 and the angular curved surface portion 137 and is substantially circular, the pressure resistance is high. Since the outer shell 130 and the partition plate 104 are integrally formed, the number of parts can be reduced, and it can be manufactured at low cost. Also in the fourth embodiment, after the inner pipe is bent at the bent portion, the inner pipes are brazed and joined 121, whereby the bending diameter can be reduced and the three-fluid heat exchanger can be reduced in size.
- the two inner tubes are described as circular tubes having the same inner diameter.
- the diameters of the inner tubes may be different depending on the type and characteristics of the refrigerant flowing in each inner tube.
- the bending diameter of the bent portion of the entire inner tube is determined by the bending diameter of the inner tube having the larger diameter, and the inner tube having the smaller diameter may be bent in accordance with the determined bending diameter.
- a fifth example of the embodiment of the present invention is a three-fluid heat exchanger of the air-conditioning hot-water supply system shown in FIG. 1 as one of the three-fluid heat exchangers mentioned as the first to fourth examples. It is the configuration applied to.
- an air conditioning refrigerant circuit, a hot water supply refrigerant circuit, and a heat medium circuit that stores heat by exchanging heat in each of the refrigerant circulating in the air conditioning refrigerant circuit and the hot water supply refrigerant circuit in a three-fluid heat exchanger
- efficient heat exchange is performed between the fluids in the three-fluid heat exchanger 23 according to various operation patterns.
- the intermediate hot water in the intermediate hot water refrigerant circuit 7 always flows in the same direction in the three-fluid heat exchanger 23, but the intermediate hot water refrigerant circuit 7 uses a three-way valve to input and output sides. If the cross circuit is provided, the flow direction in the three-fluid heat exchanger 23 of the intermediate hot water can be reversed by the control command, and the connection between the inlet and the outlet of the three-fluid heat exchanger 23 is reversed.
- the circuit may be configured as described above. In addition, by reversely connecting the inlet and the outlet, the flow direction of the fluid can be reversed for any fluid flowing in the three-fluid heat exchanger 23.
- the heat exchange performance can be improved by setting the flow of the fluid in the three-fluid heat exchanger 23 as follows. That is, when heat exchange is performed between the high-pressure side refrigerant of the air-conditioning refrigerant circuit 5 and the low-pressure side refrigerant of the hot water supply refrigerant circuit 6 (eg, cooling / hot water supply operation), the air conditioning refrigerant and the hot water supply refrigerant are counterflowed. And When heat exchange is performed between the low-pressure side refrigerant of the air conditioning refrigerant circuit 5, the low-pressure side refrigerant of the hot water supply refrigerant circuit 6, and the intermediate hot water of natural energy in the intermediate hot water refrigerant circuit 7 (eg, heating / hot water supply operation). In addition, the air conditioning refrigerant and the hot water supply refrigerant are made to counter flow with respect to the intermediate hot water of natural energy.
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Abstract
Description
空調用冷媒が循環する空調用冷媒回路、給湯用冷媒が循環する給湯用冷媒回路、自然エネルギを利用して蓄熱された温水冷媒が循環する温水冷媒回路、のそれぞれの冷媒回路に流れる、前記空調用冷媒と、前記給湯用冷媒と、前記温水冷媒との間で熱交換を行う三流体熱交換器であって、前記三流体熱交換器は、前記空調用冷媒と前記給湯用冷媒がそれぞれ流れる複数の内管と、前記複数の内管を内包し且つ前記温水冷媒が流れる外殻と、から形成され、異なる冷媒が流れていて接合された内管同士は、前記外殻内で直行部分と曲げ部分とからなる平面状の蛇行形状を形成し、前記内管における前記蛇行形状の各直行部分を仕切る仕切板は、前記内管の直行部分に並行して前記外殻内に配置されて矩形部を形成するとともに、前記内管の曲げ部分を貫通させる穴開き部を形成する構成とする。
本発明の実施形態に係る第1実施例について、図2~図4を参照しながら以下説明する。図2は本実施形態に係る三流体熱交換器に関する第1実施例の内管曲げ構造と外管構造を示す平面図である。図3は本実施形態に係る三流体熱交換器に関する第1実施例の内管及び外管の直行部分の管軸方向に対する垂直な面から見た断面図である。図4は本実施形態に係る三流体熱交換器に関する第1実施例の内管及び外管の曲げ部分の管軸方向に対する垂直な面から見た断面図である。
図4に示すように、仕切板104は、外殻103の内部を流れる温水の流路が内管直行部分温水流路113と内管曲げ部分温水流路114を形成するように、外殻103の内部を仕切った空間を形成する矩形状の板から成り立っている。仕切板104の端部はそれぞれ外殻103に固定されている。仕切板104が形成する空間には内管101,102が挿入されている。内管101,102の曲げ部分が貫通する仕切板104の穴開き部の壁面(図4の図示例で穴開き部の左端側の上下側面)と、内管101,102の曲げ部分の一部とは、ロウ付けにより接合されて、内管・仕切板接合部122が形成されている。さらに、図4において、仕切板104の穴開き部を仕切板104の上下中央部分に設けることによって、内管高さ保持用ガイド123が形成され、内管101,102を外殻103の高さ方向で略中央部分に配置することができる。また、内管101,102は三流体熱交換器の入口側118と出口側119においても外殻103と接合している。このようにして、内管101,102は、外殻103と仕切板104に固定されることで、熱交換器内で安定して固定されている。
本発明の実施形態に係る第2実施例について、図6を参照しながら以下説明する。図6は本実施形態に係る三流体熱交換器において外殻を形成する箱型外殻内に2本の内管を上下にロウ付け接合で重ね合わせた第2実施例を示す断面図である。
本発明の実施形態に係る第3実施例について、図7を参照しながら以下説明する。図7は本実施形態に係る三流体熱交換器において外殻を形成する箱型外殻内に2本の内管を平面状にロウ付け接合で重ね合わせた第3実施例を示す断面図である。
ステンレス製の箱型の外殻103に蛇行状に湾曲した銅製の内管101,102が2本収納されている。内管101,102の蛇行形状は、図2で説明した内管の直行部分と、大径115と小径116からなる曲げ部分と、を組み合わせた形状である。内管のうちのいずれか1木が空調用、残りの1本が給湯用の流路であり、内管の曲げ部分において、内管101,102同士は、小径116の曲げ部分の外側に大径115の曲げ部分の内側が接するように構成されて、互いにロウ付けで接合121されて平面板形状となっている。ここで、内管の曲げ部分の曲げ加工をした後に、ロウ付け接合121をすると、曲げ径を小さくでき、三流体熱交換器の小型化に寄与できる。外殻103は自然エネルギの温水回路(図1に示す中間温水冷媒回路7)となっている。2本の内管101,102は同一内径の円管である。
本発明の実施形態に係る第4実施例について、図8と図9を参照しながら以下説明する。図8は本実施形態に係る三流体熱交換器において外管を形成する樹脂製外殻130の端部における湾曲構造135と樹脂製外殻130内の内管曲げ構造を示す第4実施例の平面図である。図9は本実施形態に係る三流体熱交換器に関する第4実施例の内管101,102及び外管(樹脂製外殻130)の直行部分の管軸方向に対する垂直な面から見た断面図である。
本発明の実施形態に係る第5実施例は、上述の第1実施例~第4実施例として挙げた三流体熱交換器の何れかを、図1に示す空調給湯システムの三流体熱交換器に適用した構成である。
1a 制御装置
2 室内ユニット
3 給湯・蓄熱タンクユニット
4 太陽熱集熱器
5 空調用冷媒回路
6 給湯用冷媒回路
7 中間温水冷媒回路
8 室内空調用冷温水循環回路
9 給湯回路
10 太陽熱集熱用熱媒体循環回路
11 外部出湯回路
12 給湯余熱温水循環回路
21 空調用圧縮機
22 四方弁
23 三流体熱交換器(熱回収用熱交換器)
23a 空調用配管
23b 給湯用配管
23c 蓄熱中間温水配管
26 冷媒タンク
27 膨張弁
28 空調用利用側熱交換器
28a 第1の空調用利用側分割熱交換器
28b 第2の空調用利用側分割熱交換器
29 空調用冷媒バイパス配管
34 三方弁
35 開閉弁
41 給湯用圧縮機
42 給湯用利用側熱交換器
43 給湯用膨張弁
44 給湯用熱源側熱交換器
45 ファン
46 給湯用冷媒タンク
47 三方弁
48 給湯用冷媒分岐回路
50 蓄熱タンク
52 中間温水用配管
53 中間温水用配管
60 住宅
61 室内熱交換器
62 三方弁
63 余熱用冷温水バイパス配管
64 二方弁
65 空調用冷温水配管
66 空調用冷温水バイパス配管
67 室内空調用冷温水循環ポンプ
70 貯湯タンク
71 給湯用循環ポンプ
72 給湯用配管
73 給湯用配管
74 温水供給経路
75 中間温水供給経路
76 水道水供給経路
77 三方弁
78 水道水供給口
79 温水供給口
81 太陽熱集熱用循環ポンプ
82 太陽熱集熱用配管
83 太陽熱集熱用配管
91 太陽熱用熱交換器
92 給湯余熱熱交換器
93 給湯余熱温水用循環ポンプ
94 給湯余熱温水用配管
95 給湯余熱温水用配管
101 空調用内管
102 給湯用内管
103 外殻(箱型の外管)
104 仕切板
105 整流板
107 空調用冷媒流路
108 給湯用冷媒流路
110 温水入口
111 温水出口
113 内管直行部分温水流路
114 内管曲げ部分温水流路
115 大径
116 小径
117 断熱材
118 熱交換器入口側
119 熱交換器出口側
121 内管接合部
122 内管・仕切板接合部
123 内管高さ保持用ガイド
130 樹脂製外殻
135 樹脂製外殻湾曲部
136 樹脂製外殻上下平面部
137 樹脂製外殻角曲面部
Claims (15)
- 空調用冷媒が循環する空調用冷媒回路、給湯用冷媒が循環する給湯用冷媒回路、自然エネルギを利用して蓄熱された温水冷媒が循環する温水冷媒回路、のそれぞれの冷媒回路に流れる、前記空調用冷媒と、前記給湯用冷媒と、前記温水冷媒との間で熱交換を行う三流体熱交換器であって、
前記三流体熱交換器は、前記空調用冷媒と前記給湯用冷媒がそれぞれ流れる複数の内管と、前記複数の内管を内包し且つ前記温水冷媒が流れる外殻と、から形成され、
異なる冷媒が流れていて接合された内管同士は、前記外殻内で直行部分と曲げ部分とからなる平面状の蛇行形状を形成し、
前記内管における前記蛇行形状の各直行部分を仕切る仕切板は、前記内管の直行部分に並行して前記外殻内に配置されて矩形部を形成するとともに、前記内管の曲げ部分を貫通させる穴開き部を形成する
ことを特徴とする三流体熱交換器。 - 請求項1において、
前記外殻に流れる温水冷媒の流れ方向が逆転する前記外殻の角部に、前記温水冷媒の流れを前記内管の曲げ部分に沿うように誘導する整流板を設けることを特徴とする三流体熱交換器。 - 請求項1または2において、
前記内管の曲げ部分は、曲げ径の小さい内管の外側に対して曲げ径の大きな内管の内側をロウ付け接合した形状であることを特徴とする三流体熱交換器。 - 請求項1または2において、
前記仕切板の穴開き部は、前記矩形部の縦方向に前記内管を貫通させる寸法分だけ開口が略中央部分に設けられ、
前記内管は、前記穴開き部の内側縁部と接合固定されるとともに、前記内管の通る前記外殻の入口側と出口側の縦方向の略中央部分で固定配置される
ことを特徴とする三流体熱交換器。 - 請求項1または2において、
前記内管は、その曲げ部分を曲げた後に内管同士をロウ付け接合又はバンド固定して前記外殻に装填したものであることを特徴とする三流体熱交換器。 - 請求項1または2において、
前記仕切板における矩形部の各四辺端部は前記外殻に当接した構造であることを特徴とする三流体熱交換器。 - 請求項1または2において、
前記空調用冷媒と前記給湯用冷媒がそれぞれ流れる複数の内管は、2本の内管から形成され、前記2本の内管は上下に重ね合わされて接合されていることを特徴とする三流体熱交換器。 - 請求項1または2において、
前記空調用冷媒と前記給湯用冷媒がそれぞれ流れる複数の内管は、2本の内管から形成され、前記2本の内管は水平面上に配置されて接合され、前記内管の曲げ部分において、曲げ径の小さい内管の外側に対して曲げ径の大きな内管の内側を接合したものであることを特徴とする三流体熱交換器。 - 請求項1ないし8のいずれか1つの請求項において、
前記外殻はステンレス製の箱型を形成し、前記仕切板で仕切られた外殻内を前記内管の軸方向に沿って前記温水冷媒が流れることを特徴とする三流体熱交換器。 - 請求項1において、
前記外殻は樹脂製の湾曲した構造であり、
前記湾曲した構造は、前記外殻に流れる温水冷媒の流れ方向が逆転する前記外殻の両端部に形成されて、前記温水冷媒の流れを前記内管の曲げ部分に沿うように誘導することを特徴とする三流体熱交換器。 - 請求項10において、
前記湾曲した構造は、前記内管の直行部分の軸方向に垂直な前記外殻の断面が略円管状を形成されていることを特徴とする三流体熱交換器。 - 請求項10または11において、
前記外殻と前記仕切板は、樹脂で一体成形されたものであることを特徴とする三流体熱交換器。 - 請求項1ないし12のいずれか1つの請求項において、
前記空調用冷媒回路の高圧側冷媒と、前記給湯用冷媒回路の低圧側冷媒とが熱交換するときに、前記空調用冷媒と前記給湯用冷媒とが対向流となることを特徴とする三流体熱交換器。 - 請求項1ないし12のいずれか1つの請求項において、
前記空調用冷媒回路の低圧側冷媒と、前記給湯用冷媒回路の低圧側冷媒と、前記温水冷媒回路の温水冷媒とが熱交換するときに、前記温水冷媒と、前記空調用冷媒及び前記給湯用冷媒とが対向流となることを特徴とする三流体熱交換器。 - 請求項1ないし14のいずれか1つの請求項に記載された三流体熱交換器がそれぞれ用いられた、前記空調用冷媒回路を有する空調システムと、前記給湯用冷媒回路を有する給湯システムと、前記温水冷媒回路を有する自然エネルギ利用の蓄熱システムと、を備えた空調給湯システム。
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| PCT/JP2010/053141 WO2011104878A1 (ja) | 2010-02-26 | 2010-02-26 | 三流体熱交換器およびそれを用いた空調給湯システム |
| EP10846542A EP2541171A1 (en) | 2010-02-26 | 2010-02-26 | Three-fluid heat exchanger and air-conditioning/water-heating system using same |
| CN201080063644.5A CN102762934B (zh) | 2010-02-26 | 2010-02-26 | 三流体热交换器以及使用了该三流体热交换器的空气调节供热水系统 |
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| US9794851B2 (en) | 2012-09-10 | 2017-10-17 | Fujitsu Limited | Handover with mobile relays |
| CN103017425A (zh) * | 2012-12-25 | 2013-04-03 | 克莱门特捷联制冷设备(上海)有限公司 | 制冷剂管路及使用其的热交换机 |
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| WO2026009970A1 (ja) * | 2024-07-05 | 2026-01-08 | 三菱重工サーマルシステムズ株式会社 | 給湯空調機の制御装置、給湯空調機、給湯空調機システム、給湯空調機の制御方法、及びプログラム |
| JP7761741B1 (ja) * | 2024-11-27 | 2025-10-28 | アーベーベー・シュバイツ・アーゲー | 塗料温度調節装置 |
Also Published As
| Publication number | Publication date |
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| JP5509311B2 (ja) | 2014-06-04 |
| CN102762934A (zh) | 2012-10-31 |
| JPWO2011104878A1 (ja) | 2013-06-17 |
| EP2541171A1 (en) | 2013-01-02 |
| CN102762934B (zh) | 2015-08-05 |
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