WO2013168526A1 - Heat exchanger and vehicle air conditioning device - Google Patents

Heat exchanger and vehicle air conditioning device Download PDF

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Publication number
WO2013168526A1
WO2013168526A1 PCT/JP2013/061376 JP2013061376W WO2013168526A1 WO 2013168526 A1 WO2013168526 A1 WO 2013168526A1 JP 2013061376 W JP2013061376 W JP 2013061376W WO 2013168526 A1 WO2013168526 A1 WO 2013168526A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
heat
heat medium
header tank
flat tube
Prior art date
Application number
PCT/JP2013/061376
Other languages
French (fr)
Japanese (ja)
Inventor
仲戸　宏治
上坊寺　康修
克弘 齊藤
敏久 近藤
Original Assignee
三菱重工オートモーティブサーマルシステムズ株式会社
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Publication date
Application filed by 三菱重工オートモーティブサーマルシステムズ株式会社 filed Critical 三菱重工オートモーティブサーマルシステムズ株式会社
Publication of WO2013168526A1 publication Critical patent/WO2013168526A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00899—Controlling the flow of liquid in a heat pump system
    • B60H1/00914—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant does not change and there is a bypass of the condenser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0012—Brazing heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—Soldering within a furnace
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • B60H1/32281—Cooling devices using compression characterised by refrigerant circuit configurations comprising a single secondary circuit, e.g. at evaporator or condenser side
    • 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
    • F28D7/0008—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 one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0025—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 one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0209—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions
    • F28F9/0212—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions the partitions being separate elements attached to header boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0243—Header boxes having a circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

Definitions

  • the present invention relates to a heat exchanger suitable for heat exchange between a refrigerant and a heat medium, and a vehicle air conditioner using the heat exchanger.
  • HEV hybrid vehicles
  • PHEV plug-in hybrid vehicles
  • the exhaust heat of the internal combustion engine is used as a heat source for heating, but the amount of exhaust heat is decreasing due to the efficiency improvement of the internal combustion engine.
  • a heat medium such as a coolant with heat generated by a PTC heater and use it as a heat source for heating.
  • a power source for the PTC heater becomes indispensable, and the power consumption increases accordingly.
  • An increase in power consumption in the air conditioner means a decrease in the cruising distance of the vehicle, leading to a deterioration in the original performance of the vehicle.
  • a heat pump is used for the air conditioner for the vehicle, an in-vehicle condenser is provided in the HVAC unit (Heating Ventilation and Air Conditioning Unit), and refrigerant and coolant (cooling water) are provided in a cooling water circulation circuit such as an electric motor for traveling.
  • Patent Document 1 provides a heat pump type vehicle air conditioner that includes a refrigerant / coolant heat exchanger that also serves as a radiator for exchanging heat, and that includes the refrigerant / coolant heat exchanger and the in-vehicle condenser to constitute a heat pump cycle. Yes.
  • the heat pump type vehicle air conditioner disclosed in Patent Document 1 uses a refrigerant / coolant heat exchanger that exchanges heat between a refrigerant and a coolant (cooling water).
  • this refrigerant / coolant heat exchanger has a configuration in which a refrigerant flat tube through which a refrigerant is circulated and a coolant flat tube through which a coolant is circulated are alternately stacked in multiple layers via corrugated fins through which air is circulated.
  • the heat exchange between the refrigerant and the coolant is performed via fins and air. For this reason, there is a problem that a loss is caused by the amount of air passing through the fins and air, and efficiency is lowered.
  • the HVAC unit of the current system that uses the exhaust heat of the internal combustion engine, which is configured to include a radiator in which a heat medium is circulated in the air flow path in the HVAC unit, must be significantly changed. There are issues such as increased development costs.
  • the present invention has been made in view of such circumstances, and is a small high-performance and high pressure-resistant heat exchanger capable of efficiently exchanging heat between a heat medium and a high-temperature and high-pressure refrigerant, and heating with the heat exchanger. It is an object of the present invention to provide a vehicle air conditioner that consumes less power and can be heated using the heated heat medium as a heat source for heating.
  • the heat exchanger according to the first aspect of the present invention is a heat exchanger for exchanging heat between a refrigerant and a heat medium, wherein a refrigerant flat tube through which a plurality of refrigerants are circulated and a plurality of heat media are circulated.
  • the heat transfer flat tubes are alternately stacked in multiple layers and joined together, and a pair of refrigerant and heat medium are distributed and collected at both ends of the plurality of flat tubes for refrigerant and the flat tubes for heat medium, respectively.
  • the refrigerant side header tank and the heat medium side header tank are provided.
  • a plurality of refrigerant flat tubes and a plurality of heat medium flat tubes are alternately stacked in multiple layers, joined together, and a plurality of refrigerant flat tubes and heat medium flat tubes
  • a pair of refrigerant side header tanks and heat medium side header tanks for distributing and collecting the refrigerant and the heat medium are provided at both ends. Therefore, the refrigerant and the heat medium circulating in the refrigerant flat tube and the heat medium flat tube are directly heat-exchanged through the tube walls of the flat tubes joined to each other, and the heat medium is heated or cooled by the refrigerant. Can do.
  • the pressure resistance of each flat tube can be increased. Therefore, the heat exchange efficiency can be improved and the heat exchanger can be reduced in size and performance as compared with those in which heat exchange is performed between the two media via air or fins.
  • the present invention can also be effectively applied to a high-pressure refrigerant / heat medium heat exchanger for a heating heat source for heat exchange.
  • the heat exchanger includes at least the refrigerant flat tube and the heat medium side header tank to which the refrigerant flat tube, the heat medium flat tube, and both tubes are respectively connected.
  • the flat tube for heat medium may have a configuration in which a brazing material is clad on the surface, and each may be integrated by brazing and joining.
  • a brazing material is clad on the surface, and each is integrated by brazing joint. Therefore, it is possible to integrally assemble and join the flat tube and the header tank with the brazing material clad on the surface by temporarily assembling and brazing them in a furnace.
  • the refrigerant and the heat medium can be directly heat-exchanged by heat conduction between the flat tubes joined via the brazing material, heat transfer loss can be minimized and the heat exchange efficiency can be improved, and the refrigerant / heat medium A heat exchanger can be produced efficiently.
  • any one of the heat exchangers described above includes an integrated header in which the refrigerant side header tank and the heat medium side header tank are partitioned into a refrigerant side header tank part and a heat medium side header tank part through a partition. It may be configured as a tank.
  • the refrigerant side header tank and the heat medium side header tank are integrated header tanks that are partitioned into the refrigerant side header tank part and the heat medium side header tank part via the partition. Therefore, the number of header tanks can be halved by using an integrated header tank, and heat exchange between both media can be promoted even in the header tank. Therefore, the heat exchanger can be improved in performance by reducing the number of parts and increasing the heat transfer area.
  • the above-described heat exchanger may be configured such that the integrated header tank is a header tank made of an extruded product.
  • the integrated header tank is a header tank configured by an extruded product. Therefore, by making the header tank an extrusion-molded product, it is possible to obtain a header tank with high pressure resistance with as few joints as possible. Therefore, it is easy to ensure pressure resistance, and can be effectively applied to a high-pressure refrigerant / heat-medium heat exchanger for a heating heat source for exchanging heat between a high-temperature and high-pressure refrigerant gas and a heat medium.
  • any of the above-described heat exchangers may have a configuration in which the flat tube for refrigerant and / or the flat tube for heat medium is an extruded product or a laminated plate type flat tube into which an inner fin is inserted.
  • the flat tube for refrigerant and / or the flat tube for heat medium is an extruded product or a laminated plate type flat tube with an inner fin inserted. Therefore, each flat tube can be made into a tube with high pressure resistance by making the flat tube into an extruded product or a laminated plate type tube into which an inner fin is inserted. Therefore, it is easy to ensure pressure resistance, and can be effectively applied to a high-pressure refrigerant / heat-medium heat exchanger for a heating heat source for exchanging heat between a high-temperature and high-pressure refrigerant gas and a heat medium.
  • any one of the heat exchangers described above has at least one or more of distributing the refrigerant and the heat medium to each of the plurality of tube groups along the length direction of the refrigerant side header tank and the heat medium side header tank. It is good also as a structure by which the partition is provided and the refrigerant
  • the refrigerant-side header tank and the heat medium-side header tank are provided with at least one partition that distributes the refrigerant and the heat medium for each of the plurality of tube groups along the length direction thereof.
  • the path is divided so that the heat medium is circulated one or more times between the inlet and the outlet. Therefore, by circulating the refrigerant and the heat medium so as to meander through the plurality of divided tube groups, the two media can exchange heat with each other over a sufficient time. . Therefore, the heat exchange rate can be improved and the performance of the heat exchanger can be improved.
  • any of the heat exchangers described above may have a configuration in which a sacrificial anticorrosion layer is provided on the internal flow path side through which the heat medium in the heat medium flat tube and the heat medium side header tank flows.
  • the sacrificial anticorrosion layer is provided on the internal flow path side through which the heat medium flows in the heat medium flat tube and the heat medium side header tank. Therefore, the sacrificial anticorrosion layer can prevent corrosion of the heat medium flat tube through which the heat medium flows and the internal flow path of the heat medium side header tank. Therefore, it is possible to prevent corrosion of the internal flow path by the heat medium that may be used or mixed with various media, and to improve the corrosion resistance of the heat exchanger.
  • any one of the heat exchangers described above includes a heat insulating casing in which a core portion of the refrigerant flat tube, the heat medium flat tube, the refrigerant side header tank, and the heat medium side header tank of the heat exchanger is provided. It is good also as a structure stored in the inside of a body.
  • the core portion including the refrigerant flat tube, the heat medium flat tube, the refrigerant side header tank, and the heat medium side header tank of the heat exchanger is stored in the heat insulating casing. Therefore, heat transfer from the core portion of the heat exchanger to the surrounding air can be shielded by the heat insulating casing. Therefore, heat loss can be reduced, and the heat medium can be efficiently heated or cooled by effectively using the heat of the refrigerant.
  • a vehicle air conditioner includes a heat medium circulation circuit that circulates a heat medium to a radiator disposed in an HVAC unit in which vehicle interior air or outside air is circulated, and the HVAC unit.
  • a heat pump cycle that circulates a refrigerant in an evaporator disposed therein, and a heat exchanger that exchanges heat between a heat medium that circulates in the heat medium circulation circuit and a high-temperature and high-pressure refrigerant gas that circulates in the heat pump cycle /
  • the heat medium heat exchanger is any one of the heat exchangers described above.
  • the refrigerant / heat medium heat exchange that exchanges heat between the heat medium that circulates in the heat medium circuit that circulates the heat medium to the radiator and the high-temperature and high-pressure refrigerant gas that circulates in the heat pump cycle.
  • the vessel is one of the heat exchangers described above. For this reason, the heat transfer medium circulating in the heat transfer circuit and the high-temperature and high-pressure refrigerant gas circulating in the heat pump cycle are combined with a high-pressure, compact, high-performance refrigerant / heat transfer medium heat exchanger to change the tube wall of the flat tube.
  • the heat medium can be directly exchanged through heat, and the heat medium can be heated by the high-temperature and high-pressure refrigerant gas and supplied to the radiator.
  • the energy efficiency can be greatly improved, and the power consumption in the air conditioner is reduced.
  • the cruising distance of the vehicle can be extended, and the HVAC unit of the current system can be used as it is, thereby reducing development costs.
  • the refrigerant circulating through the flat tube for refrigerant and the flat tube for heat medium and the heat medium are directly heat-exchanged through the tube walls of the flat tubes joined to each other, and heat is generated by the refrigerant.
  • the medium can be heated or cooled, and the flat surfaces of the flat tubes stacked in multiple layers are joined to each other, so that the pressure resistance of each flat tube can be increased. Therefore, compared to the heat exchange between two media through air or fins, the heat exchange efficiency can be improved, the heat exchanger can be made smaller and more efficient, and the high-temperature and high-pressure refrigerant gas and the heat medium can be combined.
  • the present invention can also be effectively applied to a high-pressure refrigerant / heat medium heat exchanger for a heating heat source for heat exchange.
  • the heat medium circulating in the heat medium circulation circuit and the high-temperature and high-pressure refrigerant gas circulating in the heat pump cycle are reduced in size and performance of refrigerant / heat medium heat exchange with high-pressure specifications.
  • the heat exchanger can directly exchange heat through the tube wall of the flat tube, and the heat medium can be heated by the high-temperature and high-pressure refrigerant gas and supplied to the radiator. Therefore, compared to an air conditioner that heats the heat medium supplied to the radiator with a PTC heater or the like and uses it as a heat source for heating, the energy efficiency can be significantly improved, and the power consumption in the air conditioner is reduced. As a result, the cruising range of the vehicle can be extended, and the HVAC unit of the current system can be used as it is, thereby reducing development costs.
  • FIG. 1 It is a disassembled perspective view of the heat exchanger which concerns on 1st Embodiment of this invention. It is the front view (A) and top view (B) of the heat exchanger which concern on 2nd Embodiment of this invention. It is a block diagram of the vehicle air conditioner using the heat exchanger shown in FIG.
  • FIG. 1 is an exploded perspective view of the heat exchanger according to the first embodiment of the present invention.
  • the heat exchanger 1 is a refrigerant / heat medium heat exchanger that directly heat-exchanges a refrigerant, particularly high-temperature and high-pressure refrigerant gas discharged from a compressor, and a heat medium such as a coolant, and heats the heat medium with the refrigerant.
  • circulates a heat medium are provided.
  • the refrigerant flat tube 2 and the heat medium flat tube 3 can use flat tubes having the same configuration.
  • An alloy extruded tube or a pair of molded plates made of a thin aluminum alloy plate are stacked, and an inner fin formed by corrugating a thin aluminum alloy plate is inserted inside and joined together. Therefore, it is possible to use a laminated plate type tube or the like forming a large number of separated flow paths.
  • the refrigerant flat tube 2 and the heat medium flat tube 3 are, for example, flat tubes having a thickness of about 1 mm to 2 mm and a width of about 10 mm to 30 mm, and are used after being cut to a predetermined length.
  • the brazing material for brazing on the surface is clad. Further, both ends of the refrigerant flat tube 2 and the heat medium flat tube 3 cut to a predetermined length are connected to refrigerant side header tanks 6 and 7 and heat medium side header tanks 8 and 9, which will be described later. Insertions 4 and 5 are provided.
  • the refrigerant flat tube 2 and the heat medium flat tube 3 are each formed by alternately laminating a plurality of flat tubes and brazing them in a furnace as will be described later.
  • the flat surfaces of the flat tube 3 are joined to each other.
  • a pair of refrigerant side header tanks 6 and 7 and heat medium side header tanks 8 and 9 are respectively connected to both ends of the refrigerant flat tube 2 and the heat medium flat tube 3 through insertion portions 4 and 5, respectively. It has become so.
  • the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 have pipe-shaped header tanks arranged in parallel to each other, and are provided at opposite ends of the refrigerant flat tube 2 on their parallel opposing surfaces.
  • the horizontally long tube insertion hole 10 into which the insertion portion 4 is inserted and the horizontally long tube insertion hole 11 into which the insertion portions 5 provided at both ends of the flat tube 3 for heat medium are inserted are provided. Yes.
  • the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 are also made of aluminum alloy.
  • the refrigerant side header tank 6 is a header tank on the refrigerant inlet side, a refrigerant inlet portion (not shown) is provided, the refrigerant side header tank 7 is a header tank on the refrigerant outlet side, and a refrigerant outlet (not shown) is shown. It is set as the structure by which the part was provided.
  • the heat medium side header tank 8 is a header tank on the heat medium inlet side, a heat medium inlet part (not shown) is provided, and the heat medium side header tank 9 is a header tank part on the heat medium outlet side.
  • a heat medium outlet portion (not shown) is provided, and the refrigerant and the heat medium are circulated as indicated by solid arrows.
  • the refrigerant side header tank 6 and the heat medium side header tank 8 are the refrigerant and heat medium inlet side header tank
  • the refrigerant side header tank 7 and the heat medium side header tank 9 are the refrigerant and heat medium outlet side.
  • a parallel flow type refrigerant / heat medium heat exchanger (heat exchanger) 1 is shown as a header tank, the inlet side and the outlet side of the header tank of one medium are reversed, for example, heat It goes without saying that the medium may be circulated from the header tank 9 to the header tank 8 side to form a counter flow type refrigerant / heat medium heat exchanger (heat exchanger) 1.
  • the refrigerant / heat-medium heat exchanger (heat exchanger) 1 uses an assembly jig, and a plurality of flat refrigerant tubes 2 and flat tubes 3 for heat medium are alternately stacked in multiple layers, respectively.
  • the refrigerant side header tanks 6 and 7 are inserted into the insertion portions 4 at both ends of the flat tube 2 through the tube insertion holes 10, and heat is inserted into the insertion portions 5 at both ends of the flat tube 3 for heat medium through the tube insertion holes 11.
  • the medium side header tanks 8 and 9 the refrigerant flat tube 2, the heat medium flat tube 3, the refrigerant side header tanks 6 and 7, and the heat medium side header tanks 8 and 9 can be temporarily assembled.
  • the temporarily assembled refrigerant / heat medium heat exchanger 1 is placed in a furnace and heated to a predetermined temperature to melt the brazing material clad on the surfaces of the refrigerant flat tube 2 and the heat medium flat tube 3, With the brazing material, the flat surfaces of the refrigerant flat tube 2 and the heat medium flat tube 3, the space between the refrigerant flat tube 2 and the refrigerant side header tanks 6 and 7, and the heat medium flat tube 3 and the heat medium side header tank.
  • the refrigerant / heat-medium heat exchanger 1 can be manufactured by brazing between 8 and 9 and integrally sealing and joining them.
  • the refrigerant / heat medium heat exchanger 1 is arranged in the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 along the length direction of the refrigerant and heat medium for each of a plurality of tube groups.
  • One or more partition plates 12 are provided to distribute the refrigerant, and the refrigerant and the heat medium flowing into the refrigerant side header tank 6 and the heat medium side header tank 8 that are the inlet side header tank are the refrigerant side header that is the outlet side header tank. While flowing out from the tank 7 and the heat medium side header tank 9, it is good also as a structure which divided
  • the same header tank is provided with refrigerant and heat medium inlet / outlet.
  • the inlet of the heat medium and the outlet of the refrigerant and the heat medium are provided on the other header tank side.
  • a sacrificial anticorrosion layer is provided on the heat medium flat tube 3 through which the heat medium flows and the internal flow path side of the heat medium side header tanks 8 and 9.
  • the refrigerant / heat medium heat exchanger 1 that exchanges heat between the high-temperature and high-pressure refrigerant gas and the heat medium, the refrigerant flat tube 2 through which a plurality of refrigerants are circulated,
  • the heat medium flat tubes 3 through which a plurality of heat media are circulated are alternately laminated in multiple layers and brazed to each other, and are attached to both ends of the plurality of refrigerant flat tubes 2 and the heat medium flat tubes 3.
  • the pair of refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 for distributing and collecting the refrigerant and the heat medium are provided.
  • the tube walls of the refrigerant flat tube 2 and the heat medium flat tube 3 in which the high-temperature and high-pressure refrigerant flowing through the refrigerant flat tube 2 and the heat medium flat tube 3 and the heat medium are brazed to each other are joined.
  • the heat medium can be heated directly by the high-temperature and high-pressure refrigerant.
  • the flat surfaces of the refrigerant flat tube 2 and the heat medium flat tube 3 stacked in multiple layers are brazed to each other, the refrigerant flat tube 2 and the heat medium flat tube are combined. 3 can be improved in pressure resistance.
  • the heat exchange efficiency can be improved and the refrigerant / heat medium heat exchanger 1 can be reduced in size and performance as compared with the case where heat is exchanged between the two media via air or fins, and a high-temperature and high-pressure refrigerant can be obtained.
  • the present invention can also be effectively applied to a high-pressure refrigerant / heat medium heat exchanger 1 for a heating heat source that exchanges heat between a gas and a heat medium.
  • At least the refrigerant flat tube 2 and the heat medium flat tube 3 have a structure in which a brazing material is clad on the surface, and each is integrated by brazing joint.
  • the refrigerant flat tube 2 and the heat medium flat tube 3 clad with the brazing material, the refrigerant header tanks 6 and 7 and the heat medium header tanks 8 and 9 are temporarily assembled, and they are placed in the furnace.
  • they can be assembled and joined together. Therefore, the refrigerant and the heat medium can be directly heat-exchanged by heat conduction between the refrigerant flat tube 2 and the heat medium flat tube 3 joined via the brazing material, and heat transfer loss is minimized to improve heat exchange efficiency.
  • the refrigerant / heat medium heat exchanger 1 can be produced efficiently.
  • the refrigerant flat tube 2 and / or the heat medium flat tube 3 is an extruded product or a laminated plate type flat tube into which an inner fin is inserted, the refrigerant flat tube 2 and / or the heat medium.
  • the flat tube 3 for use into an extrusion molded product or a laminated plate type tube into which an inner fin is inserted each of the flat tube 2 for refrigerant and the flat tube 3 for heat medium can be made a high pressure-resistant tube. Therefore, it is easy to ensure pressure resistance, and it can be effectively applied to the high-pressure refrigerant / heat medium heat exchanger 1 for a heating heat source that exchanges heat between a high-temperature and high-pressure refrigerant gas and a heat medium.
  • the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 are divided into a plurality of refrigerant flat tubes 2 and heat medium flat tubes 3 along the length direction.
  • At least one or more partition plates 12 for distributing the refrigerant and the heat medium are provided, and the path is divided so that the refrigerant and the heat medium are circulated one or more times from the inlet to the outlet.
  • the refrigerant and the heat medium are circulated in a meandering manner by turning the refrigerant and the heat medium one or more times through the plurality of refrigerant flat tubes 2 and the heat medium flat tubes 3 divided by the pass, Heat can be exchanged over time. Therefore, a heat exchange rate can be improved and the heat exchanger 1 can be improved in performance.
  • the sacrificial anticorrosion layer is provided in the internal flow path through which the heat medium flows in the heat medium flat tube 3 and the heat medium header tanks 8 and 9, the heat medium through which the heat medium flows.
  • the sacrificial anticorrosion layer can prevent corrosion of the internal flow paths of the flat tube 3 for use and the heat medium side header tanks 8 and 9. Therefore, corrosion of the internal flow path due to the heat medium that may be used or mixed with various media can be prevented, and the corrosion resistance of the heat exchanger 1 can be improved.
  • FIGS. 1 and 22 differs in the structure of the header tanks 21 and 22 with respect to above-described 1st Embodiment. Since other points are the same as those in the first embodiment, description thereof will be omitted.
  • the header tanks 21 and 22 provided at both ends of the refrigerant flat tube 2 and the heat medium flat tube 3 are provided with partitions 23 and 24 inside, and the inside is formed with the refrigerant side header tank portions 25 and 26.
  • the integrated header tanks 21 and 22 are partitioned into heat medium side header tank portions 27 and 28.
  • the integrated header tanks 21 and 22 are made of extruded products.
  • the external sides of the integrated header tanks 21 and 22 are refrigerant side header tank portions 25 and 26
  • the internal sides are heat medium side header tank portions 27 and 28, and both ends of the refrigerant flat tube 2 are heated.
  • the medium side header tank parts 27 and 28 and the partitions 23 and 24 are connected to the refrigerant side header tank parts 25 and 26.
  • both ends of the heat medium flat tube 3 are connected to the heat medium side header tank portions 27 and 28.
  • the heat medium side header tank portions 27 and 28 may be provided on the outside side and the refrigerant side header tank portions 25 and 26 may be provided on the inside side.
  • the refrigerant side header tank and the heat medium side header tank are partitioned into the refrigerant side header tank parts 25 and 26 and the heat medium side header tank parts 27 and 28 through the partitions 23 and 24.
  • the integrated header tanks 21 and 22 can be used. Therefore, the number of header tanks can be halved by using the integrated header tanks 21 and 22, and heat exchange between both media can be promoted in the integrated header tanks 21 and 22. Therefore, the refrigerant / heat medium heat exchanger 1 can be improved in performance by reducing the number of parts and increasing the heat transfer area.
  • the present embodiment relates to a heat pump type vehicle air conditioner 30 to which the heat exchanger (refrigerant / heat medium heat exchanger) 1 shown in the first and second embodiments described above is applied.
  • the heat pump vehicle air conditioner 30 includes an HVAC unit (Heating Ventilation and Air Conditioning Unit) 31, a heat medium circulation circuit 32, and a heat pump cycle 33. Further, a cooling water circulation circuit 35 such as an engine or a motor connected to the heat medium circulation circuit 32 via a four-way switching valve 34 is provided.
  • HVAC unit Heating Ventilation and Air Conditioning Unit
  • a cooling water circulation circuit 35 such as an engine or a motor connected to the heat medium circulation circuit 32 via a four-way switching valve 34 is provided.
  • the HVAC unit 31 includes a blower 38 that sucks and circulates inside air or outside air in the vehicle interior, a PTC heater 39 for heating assistance, an evaporator 40, and a radiator 41.
  • the inside air or the outside air circulated by the blower 38 is cooled, heated or dehumidified by the PTC heater 39, the evaporator 40, the radiator 41, etc., and blown out into the vehicle.
  • a known current system can be applied to the HVAC unit 31 as it is.
  • the heat medium circulation circuit 32 circulates the heat medium heated by the refrigerant / heat medium heat exchanger 1 to the radiator 41 of the HVAC unit 31, and includes a heat medium circulation pump 42, a four-way switching valve 34, The refrigerant / heat medium heat exchanger 1, the radiator 41, and the buffer tank 43 are sequentially connected by piping.
  • the core of the heat exchanger 1 that is, the refrigerant flat tube 2, the heat medium flat tube 3, the refrigerant side header tank 6, 7 and the heat medium side header tanks 8 and 9 or the integrated header tanks 21 and 22 and the like are housed and installed in the heat-insulating housing 44, and the heat exchanger 1 is connected to the ambient air from the core portion. The heat transfer is shielded.
  • the heat pump cycle 33 includes a refrigerant compressor 45, a three-way switching valve 46, an external condenser 47, a receiver 48, an expansion valve 49, and an evaporator 40 in order to form a cooling cycle, and the three-way switching valve 46 and the receiver 48.
  • the refrigerant / heat medium heat exchanger 1 functioning as a condenser (condenser) is connected in parallel with the external condenser 47 between the refrigerant compressor 45, the three-way switching valve 46, the refrigerant / heat medium heat exchanger 1, and the receiver.
  • the heat pump heating cycle can be configured by 48, the expansion valve 49, and the evaporator 40.
  • the cooling water circulation circuit 35 includes an engine or motor 50, a buffer tank 51, a radiator 52, a cooling water pump 53, and the like, and a bypass circuit 54 via the four-way switching valve 34 is connected to the cooling water circulation circuit 35. It is said that.
  • the external condenser 47 of the heat pump cycle 33 and the radiator 52 of the cooling water circulation circuit 35 are arranged in parallel, and can be ventilated through a common fan 55.
  • the refrigerant compressed by the refrigerant compressor 45 is circulated in the cooling cycle by the three-way switching valve 46 in the order of the external capacitor 47, the receiver 48, the expansion valve 49, and the evaporator 40.
  • the air blown by the blower 38 can be cooled for cooling.
  • the refrigerant compressed by the refrigerant compressor 45 is circulated through the heat pump heating cycle in the order of the refrigerant / heat medium heat exchanger 1, the receiver 48, the expansion valve 49, and the evaporator 40 by the three-way switching valve 46, and the refrigerant / heat medium heat is circulated.
  • the exchanger 1 is caused to function as a condenser, and the heat medium is heated by the high-temperature and high-pressure refrigerant gas. Then, the heat medium is circulated to the radiator 41 by the heat medium circulation circuit 32, so that the air passing through the evaporator 40 can be heated by the radiator 41 and used for heating or dehumidification.
  • the heat medium circulating in the heat medium circulation circuit 32 and the high-temperature and high-pressure refrigerant gas circulating in the heat pump cycle 33 are converted into a high-pressure, small, high-performance refrigerant / heat medium heat exchanger.
  • the heat exchanger 1 can directly exchange heat through the tube walls of the refrigerant flat tube 2 and the heat medium flat tube 3, heat the heat medium with a high-temperature and high-pressure refrigerant gas, and supply it to the radiator 41. Therefore, compared with an air conditioner that heats the heat medium supplied to the radiator 41 with a PTC heater or the like and uses it as a heat source for heating, the energy efficiency can be greatly improved, and the power consumption in the air conditioner 30 can be reduced. As a result, the cruising distance of the vehicle can be extended, and the HVAC unit 31 of the current system can be used as it is, thereby reducing development costs.
  • the refrigerant flat tube 2 In installing the refrigerant / heat medium heat exchanger (heat exchanger) 1 between the heat medium circulation circuit 32 and the heat pump cycle 33, the refrigerant flat tube 2, the heat medium flat tube 3 of the heat exchanger 1, Core portions such as the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 or the integrated header tanks 21 and 22 are housed and installed in a case 44 having heat insulation properties. For this reason, the heat transfer from the core portion of the heat exchanger 1 to the ambient air can be shielded by the heat insulating casing 44. Therefore, heat loss can be reduced, and the heat medium can be efficiently heated or cooled by effectively using the heat of the refrigerant.
  • heat exchanger heat exchanger
  • this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably.
  • the present invention may be applied to a refrigerant / heat medium heat exchanger that exchanges heat between a low-pressure refrigerant and a heat medium and cools the heat medium.
  • Heat exchanger (refrigerant / heat medium heat exchanger) 2 Flat tube for refrigerant 3 Flat tube for heat medium 6, 7 Refrigerant side header tank 8, 9 Heat medium side header tank 12 Partition plates 21, 22 Integrated header tanks 23, 24 Partitions 25, 26 Refrigerant side header tank 27, 28 Heat medium side header tank 30 Vehicle air conditioner 31 HVAC unit 32 Heat medium circulation circuit 33 Heat pump cycle 40 Evaporator 41 Radiator 44 Insulating housing

Abstract

Provided is a compact, high-performance, and highly pressure resistant heat exchanger (1) which is capable of efficiently exchanging heat between a heat medium and a high-temperature, high-pressure refrigerant; also provided is a low power consumption vehicle air conditioning device which can perform heating with a heat medium which is heated by said heat exchanger as the heat source. In this heat exchanger for exchanging heat between a refrigerant and a heat medium, multiple refrigerant flat tubes (2) through which a refrigerant circulates and multiple heat medium flat tubes (3) through which a heat medium circulates are laminated alternately in multiple layers and bonded together, and a pair of refrigerant-side header tanks (6, 7) and heat medium-side header tanks (8, 9) which distribute and collect the refrigerant and the heat medium, respectively, are provided at both ends of the multiple refrigerant flat tubes (2) and the multiple heat medium flat tubes (3).

Description

熱交換器および車両用空調装置Heat exchanger and vehicle air conditioner
　本発明は、冷媒と熱媒体との熱交換に好適な熱交換器およびそれを用いた車両用空調装置に関する。 The present invention relates to a heat exchanger suitable for heat exchange between a refrigerant and a heat medium, and a vehicle air conditioner using the heat exchanger.
　ハイブリッド車（ＨＥＶ）やプラグインハイブリッド車（ＰＨＥＶ）では、暖房用熱源に内燃機関の排熱を利用しているが、内燃機関の効率のアップ等から排熱量が少なくなってきており、電気自動車（ＥＶ）と同様、クーラント等の熱媒体をＰＴＣヒータの発熱で加熱し、それを暖房用熱源とする空調装置が増加している。この場合、ＰＴＣヒータ用の電源が不可欠となり、それに伴って電力消費量が多くなる。空調装置での電力消費量の増大は、車両の航続走行距離の低下を意味し、車本来の性能を損なうことに繋がる。 In hybrid vehicles (HEV) and plug-in hybrid vehicles (PHEV), the exhaust heat of the internal combustion engine is used as a heat source for heating, but the amount of exhaust heat is decreasing due to the efficiency improvement of the internal combustion engine. As in (EV), there is an increasing number of air conditioners that heat a heat medium such as a coolant with heat generated by a PTC heater and use it as a heat source for heating. In this case, a power source for the PTC heater becomes indispensable, and the power consumption increases accordingly. An increase in power consumption in the air conditioner means a decrease in the cruising distance of the vehicle, leading to a deterioration in the original performance of the vehicle.
　一方、車両用空調装置にヒートポンプを用い、ＨＶＡＣユニット（Ｈｅａｔｉｎｇ　Ｖｅｎｔｉｌａｔｉｏｎ　ａｎｄ　Ａｉｒ　Ｃｏｎｄｉｔｉｏｎｉｎｇ　Ｕｎｉｔ）内に車内凝縮器を設けるとともに、走行用電動モータ等の冷却水循環回路中に、冷媒とクーラント（冷却水）とを熱交換するラジエータ兼用の冷媒／クーラント熱交換器を設け、これら冷媒／クーラント熱交換器および車内凝縮器を含んでヒートポンプサイクルを構成したヒートポンプ式の車両用空調装置が特許文献１により提供されている。 On the other hand, a heat pump is used for the air conditioner for the vehicle, an in-vehicle condenser is provided in the HVAC unit (Heating Ventilation and Air Conditioning Unit), and refrigerant and coolant (cooling water) are provided in a cooling water circulation circuit such as an electric motor for traveling. Patent Document 1 provides a heat pump type vehicle air conditioner that includes a refrigerant / coolant heat exchanger that also serves as a radiator for exchanging heat, and that includes the refrigerant / coolant heat exchanger and the in-vehicle condenser to constitute a heat pump cycle. Yes.
特開２０１２－７８２１号公報JP 2012-7821 A
　上記特許文献１に示されたヒートポンプ式の車両用空調装置は、冷媒とクーラント（冷却水）とを熱交換する冷媒／クーラント熱交換器を用いたものである。しかし、この冷媒／クーラント熱交換器は、冷媒が流通される冷媒用扁平チューブと、クーラントが流通されるクーラント用扁平チューブとを、空気を流通させるコルゲートフィンを介して交互に多層に積層した構成としており、冷媒とクーラント間の熱交換をフィンおよび空気を介して行うようにしている。このため、フィンおよび空気を介する分だけロスが生じ、効率が低下する等の課題を有している。 The heat pump type vehicle air conditioner disclosed in Patent Document 1 uses a refrigerant / coolant heat exchanger that exchanges heat between a refrigerant and a coolant (cooling water). However, this refrigerant / coolant heat exchanger has a configuration in which a refrigerant flat tube through which a refrigerant is circulated and a coolant flat tube through which a coolant is circulated are alternately stacked in multiple layers via corrugated fins through which air is circulated. The heat exchange between the refrigerant and the coolant is performed via fins and air. For this reason, there is a problem that a loss is caused by the amount of air passing through the fins and air, and efficiency is lowered.
　また、上記のヒートポンプ式車両用空調装置は、ＨＶＡＣユニット内の空気流路にヒートポンプサイクルを構成する車内凝縮器を配設する必要がある。このため、ＨＶＡＣユニット内の空気流路に熱媒体が循環される放熱器を設けた構成とされている内燃機関の排熱を利用した現行システムのＨＶＡＣユニットを大幅に変更しなければならず、開発費用が嵩む等の課題を有している。 Further, in the above heat pump type vehicle air conditioner, it is necessary to dispose an in-vehicle condenser constituting a heat pump cycle in an air flow path in the HVAC unit. For this reason, the HVAC unit of the current system that uses the exhaust heat of the internal combustion engine, which is configured to include a radiator in which a heat medium is circulated in the air flow path in the HVAC unit, must be significantly changed. There are issues such as increased development costs.
　本発明は、このような事情に鑑みてなされたものであって、熱媒体と高温高圧冷媒とを効率よく熱交換できる小型高性能でかつ耐圧性の高い熱交換器およびその熱交換器で加熱された熱媒体を暖房用熱源として暖房することができる消費電力の少ない車両用空調装置を提供することを目的とする。 The present invention has been made in view of such circumstances, and is a small high-performance and high pressure-resistant heat exchanger capable of efficiently exchanging heat between a heat medium and a high-temperature and high-pressure refrigerant, and heating with the heat exchanger. It is an object of the present invention to provide a vehicle air conditioner that consumes less power and can be heated using the heated heat medium as a heat source for heating.
　本発明の第１の態様にかかる熱交換器は、冷媒と熱媒体とを互いに熱交換する熱交換器であって、複数の冷媒が流通される冷媒用扁平チューブと、複数の熱媒体が流通される熱媒体用扁平チューブとを交互に多層に積層し、互いに接合するとともに、複数の前記冷媒用扁平チューブおよび前記熱媒体用扁平チューブの両端に、それぞれ冷媒および熱媒体を分配および集合する一対の冷媒側ヘッダタンクおよび熱媒体側ヘッダタンクが設けられている。 The heat exchanger according to the first aspect of the present invention is a heat exchanger for exchanging heat between a refrigerant and a heat medium, wherein a refrigerant flat tube through which a plurality of refrigerants are circulated and a plurality of heat media are circulated. The heat transfer flat tubes are alternately stacked in multiple layers and joined together, and a pair of refrigerant and heat medium are distributed and collected at both ends of the plurality of flat tubes for refrigerant and the flat tubes for heat medium, respectively. The refrigerant side header tank and the heat medium side header tank are provided.
　第１の態様によれば、複数の冷媒用扁平チューブと、複数の熱媒体用扁平チューブとを交互に多層に積層し、互いに接合するとともに、複数の冷媒用扁平チューブおよび熱媒体用扁平チューブの両端に、それぞれ冷媒および熱媒体を分配および集合する一対の冷媒側ヘッダタンクおよび熱媒体側ヘッダタンクが設けられている。そのため、冷媒用扁平チューブおよび熱媒体用扁平チューブ内を流通する冷媒と熱媒体とを互いに接合されている扁平チューブのチューブ壁を介して直接熱交換し、冷媒により熱媒体を加熱または冷却することができる。それとともに、多層に積層された扁平チューブの扁平面同士が互いに接合された構成とされることから、それぞれの扁平チューブの耐圧性を高めることができる。従って、空気やフィンを介在して２媒体を熱交換するものに比べ、熱交換効率を向上させ、熱交換器を小型高性能化することができるとともに、高温高圧の冷媒ガスと熱媒体とを熱交換する暖房熱源用の高圧仕様の冷媒／熱媒体熱交換器にも有効に適用することができる。 According to the first aspect, a plurality of refrigerant flat tubes and a plurality of heat medium flat tubes are alternately stacked in multiple layers, joined together, and a plurality of refrigerant flat tubes and heat medium flat tubes A pair of refrigerant side header tanks and heat medium side header tanks for distributing and collecting the refrigerant and the heat medium are provided at both ends. Therefore, the refrigerant and the heat medium circulating in the refrigerant flat tube and the heat medium flat tube are directly heat-exchanged through the tube walls of the flat tubes joined to each other, and the heat medium is heated or cooled by the refrigerant. Can do. At the same time, since the flat surfaces of the flat tubes stacked in multiple layers are joined to each other, the pressure resistance of each flat tube can be increased. Therefore, the heat exchange efficiency can be improved and the heat exchanger can be reduced in size and performance as compared with those in which heat exchange is performed between the two media via air or fins. The present invention can also be effectively applied to a high-pressure refrigerant / heat medium heat exchanger for a heating heat source for heat exchange.
　上記の熱交換器は、前記冷媒用扁平チューブおよび前記熱媒体用扁平チューブ並びに両チューブがそれぞれ接続される前記冷媒側ヘッダタンクおよび前記熱媒体側ヘッダタンクのうち、少なくとも前記冷媒用扁平チューブおよび前記熱媒体用扁平チューブが、表面にろう材がクラッドされた構成とされ、各々が互いにろう付け接合により一体化されている構成としてもよい。 The heat exchanger includes at least the refrigerant flat tube and the heat medium side header tank to which the refrigerant flat tube, the heat medium flat tube, and both tubes are respectively connected. The flat tube for heat medium may have a configuration in which a brazing material is clad on the surface, and each may be integrated by brazing and joining.
　この構成によれば、冷媒用扁平チューブおよび熱媒体用扁平チューブ並びに両チューブがそれぞれ接続される冷媒側ヘッダタンクおよび熱媒体側ヘッダタンクのうち、少なくとも冷媒用扁平チューブおよび熱媒体用扁平チューブが、表面にろう材がクラッドされた構成とされ、各々が互いにろう付け接合により一体化されている。そのため、表面にろう材がクラッドされている扁平チューブとヘッダタンクとを仮組み立てし、それを炉中でろう付けすることによって一体的に組み付け接合することができる。従って、ろう材を介して接合された扁平チューブ同士の熱伝導により直接冷媒と熱媒体とを熱交換でき、伝熱ロスを最小化して熱交換効率を向上させることができるとともに、冷媒／熱媒体熱交換器を効率よく生産することができる。 According to this configuration, at least the refrigerant flat tube and the heat medium flat tube among the refrigerant side header tank and the heat medium side header tank to which the refrigerant flat tube and the heat medium flat tube and the both tubes are connected, respectively, A brazing material is clad on the surface, and each is integrated by brazing joint. Therefore, it is possible to integrally assemble and join the flat tube and the header tank with the brazing material clad on the surface by temporarily assembling and brazing them in a furnace. Therefore, the refrigerant and the heat medium can be directly heat-exchanged by heat conduction between the flat tubes joined via the brazing material, heat transfer loss can be minimized and the heat exchange efficiency can be improved, and the refrigerant / heat medium A heat exchanger can be produced efficiently.
　上述のいずれかの熱交換器は、前記冷媒側ヘッダタンクおよび前記熱媒体側ヘッダタンクが、仕切りを介して内部が冷媒側ヘッダタンク部と熱媒体側ヘッダタンク部とに区画された一体型ヘッダタンクとされている構成としてもよい。 Any one of the heat exchangers described above includes an integrated header in which the refrigerant side header tank and the heat medium side header tank are partitioned into a refrigerant side header tank part and a heat medium side header tank part through a partition. It may be configured as a tank.
　この構成によれば、冷媒側ヘッダタンクおよび熱媒体側ヘッダタンクが、仕切りを介して内部が冷媒側ヘッダタンク部と熱媒体側ヘッダタンク部とに区画された一体型ヘッダタンクとされている。そのため、ヘッダタンクの数を一体型ヘッダタンクとすることによって半減することができるとともに、ヘッダタンク内においても両媒体間の熱交換を促進することができる。従って、部品数の低減および伝熱面積の増大により、熱交換器をより高性能化することができる。 According to this configuration, the refrigerant side header tank and the heat medium side header tank are integrated header tanks that are partitioned into the refrigerant side header tank part and the heat medium side header tank part via the partition. Therefore, the number of header tanks can be halved by using an integrated header tank, and heat exchange between both media can be promoted even in the header tank. Therefore, the heat exchanger can be improved in performance by reducing the number of parts and increasing the heat transfer area.
　上述の熱交換器は、前記一体型ヘッダタンクが、押出し成形品により構成されたヘッダタンクとされている構成としてもよい。 The above-described heat exchanger may be configured such that the integrated header tank is a header tank made of an extruded product.
　この構成によれば、一体型のヘッダタンクが、押出し成形品により構成されたヘッダタンクとされている。そのため、ヘッダタンクを押出し成形品とすることにより、接合部を極力少なくした耐圧性の高いヘッダタンクとすることができる。従って、耐圧性を確保し易く、特に高温高圧の冷媒ガスと熱媒体とを熱交換する暖房熱源用の高圧仕様の冷媒／熱媒体熱交換器に有効に適用することができる。 According to this configuration, the integrated header tank is a header tank configured by an extruded product. Therefore, by making the header tank an extrusion-molded product, it is possible to obtain a header tank with high pressure resistance with as few joints as possible. Therefore, it is easy to ensure pressure resistance, and can be effectively applied to a high-pressure refrigerant / heat-medium heat exchanger for a heating heat source for exchanging heat between a high-temperature and high-pressure refrigerant gas and a heat medium.
　上述のいずれかの熱交換器は、前記冷媒用扁平チューブおよび／または前記熱媒体用扁平チューブが、押出し成形品もしくはインナーフィンを挿入した積層プレートタイプの扁平チューブとされている構成としてもよい。 Any of the above-described heat exchangers may have a configuration in which the flat tube for refrigerant and / or the flat tube for heat medium is an extruded product or a laminated plate type flat tube into which an inner fin is inserted.
　この構成によれば、冷媒用扁平チューブおよび／または熱媒体用扁平チューブが、押出し成形品もしくはインナーフィンを挿入した積層プレートタイプの扁平チューブとされている。そのため、扁平チューブを押出し成形品もしくはインナーフィンを挿入した積層プレートタイプのチューブとすることにより、それぞれの扁平チューブを耐圧性の高いチューブとすることができる。従って、耐圧性を確保し易く、特に高温高圧の冷媒ガスと熱媒体とを熱交換する暖房熱源用の高圧仕様の冷媒／熱媒体熱交換器に有効に適用することができる。 According to this configuration, the flat tube for refrigerant and / or the flat tube for heat medium is an extruded product or a laminated plate type flat tube with an inner fin inserted. Therefore, each flat tube can be made into a tube with high pressure resistance by making the flat tube into an extruded product or a laminated plate type tube into which an inner fin is inserted. Therefore, it is easy to ensure pressure resistance, and can be effectively applied to a high-pressure refrigerant / heat-medium heat exchanger for a heating heat source for exchanging heat between a high-temperature and high-pressure refrigerant gas and a heat medium.
　上述のいずれかの熱交換器は、前記冷媒側ヘッダタンクおよび前記熱媒体側ヘッダタンクには、その長さ方向に沿って複数本のチューブ群毎に冷媒および熱媒体を分配する少なくとも１以上の仕切りが設けられ、冷媒および熱媒体が入口から出口に至る間に１回以上ターンして流通されるようにパス割りされている構成としてもよい。 Any one of the heat exchangers described above has at least one or more of distributing the refrigerant and the heat medium to each of the plurality of tube groups along the length direction of the refrigerant side header tank and the heat medium side header tank. It is good also as a structure by which the partition is provided and the refrigerant | coolant and the heat medium distribute | circulate the path | pass so that it may circulate | turn through 1 or more times from an entrance to an exit.
　この構成によれば、冷媒側ヘッダタンクおよび熱媒体側ヘッダタンクに、その長さ方向に沿って複数本のチューブ群毎に冷媒および熱媒体を分配する少なくとも１以上の仕切りが設けられ、冷媒および熱媒体が入口から出口に至る間に１回以上ターンして流通されるようにパス割りされている。そのため、パス割りされた複数本のチューブ群に対して、冷媒および熱媒体を１回以上ターンさせて蛇行するように流通させることにより、両媒体を互いに十分時間をかけて熱交換させることができる。従って、熱交換率を向上させ、熱交換器をより高性能化することができる。 According to this configuration, the refrigerant-side header tank and the heat medium-side header tank are provided with at least one partition that distributes the refrigerant and the heat medium for each of the plurality of tube groups along the length direction thereof. The path is divided so that the heat medium is circulated one or more times between the inlet and the outlet. Therefore, by circulating the refrigerant and the heat medium so as to meander through the plurality of divided tube groups, the two media can exchange heat with each other over a sufficient time. . Therefore, the heat exchange rate can be improved and the performance of the heat exchanger can be improved.
　上述のいずれかの熱交換器は、前記熱媒体用扁平チューブおよび前記熱媒体側ヘッダタンクの熱媒体が流通する内部流路側に、犠牲防食層が設けられている構成としてもよい。 Any of the heat exchangers described above may have a configuration in which a sacrificial anticorrosion layer is provided on the internal flow path side through which the heat medium in the heat medium flat tube and the heat medium side header tank flows.
　この構成によれば、熱媒体用扁平チューブおよび熱媒体側ヘッダタンクにおける熱媒体が流通する内部流路側に、犠牲防食層が設けられている。そのため、熱媒体が流通する熱媒体用扁平チューブおよび熱媒体側ヘッダタンクの内部流路の腐食を犠牲防食層により防止することができる。従って、様々な媒体が用いられ、または混入される可能性がある熱媒体による内部流路の腐食を防止し、熱交換器の耐食性を向上することができる。 According to this configuration, the sacrificial anticorrosion layer is provided on the internal flow path side through which the heat medium flows in the heat medium flat tube and the heat medium side header tank. Therefore, the sacrificial anticorrosion layer can prevent corrosion of the heat medium flat tube through which the heat medium flows and the internal flow path of the heat medium side header tank. Therefore, it is possible to prevent corrosion of the internal flow path by the heat medium that may be used or mixed with various media, and to improve the corrosion resistance of the heat exchanger.
　上述のいずれかの熱交換器は、前記熱交換器の前記冷媒用扁平チューブ、前記熱媒体用扁平チューブ、前記冷媒側ヘッダタンクおよび前記熱媒体側ヘッダタンクからなるコア部が、断熱性の筐体内部に格納されている構成としてもよい。 Any one of the heat exchangers described above includes a heat insulating casing in which a core portion of the refrigerant flat tube, the heat medium flat tube, the refrigerant side header tank, and the heat medium side header tank of the heat exchanger is provided. It is good also as a structure stored in the inside of a body.
　この構成によれば、熱交換器の冷媒用扁平チューブ、熱媒体用扁平チューブ、冷媒側ヘッダタンクおよび熱媒体側ヘッダタンクからなるコア部が、断熱性の筐体内部に格納されている。そのため、熱交換器のコア部から周囲空気への熱移動を断熱性の筐体によって遮蔽することができる。従って、熱ロスを低減し、冷媒の熱を有効に利用して効率よく熱媒体を加熱または冷却することができる。 According to this configuration, the core portion including the refrigerant flat tube, the heat medium flat tube, the refrigerant side header tank, and the heat medium side header tank of the heat exchanger is stored in the heat insulating casing. Therefore, heat transfer from the core portion of the heat exchanger to the surrounding air can be shielded by the heat insulating casing. Therefore, heat loss can be reduced, and the heat medium can be efficiently heated or cooled by effectively using the heat of the refrigerant.
　本発明の第２の態様にかかる車両用空調装置は、車室内空気または外気が流通されるＨＶＡＣユニット内に配設されている放熱器に熱媒体を循環する熱媒体循環回路と、前記ＨＶＡＣユニット内に配設されているエバポレータに冷媒を循環するヒートポンプサイクルとを備え、前記熱媒体循環回路を循環する熱媒体と、前記ヒートポンプサイクル内を循環する高温高圧の冷媒ガスとを熱交換する冷媒／熱媒体熱交換器が、上述のいずれかの熱交換器とされている。 A vehicle air conditioner according to a second aspect of the present invention includes a heat medium circulation circuit that circulates a heat medium to a radiator disposed in an HVAC unit in which vehicle interior air or outside air is circulated, and the HVAC unit. A heat pump cycle that circulates a refrigerant in an evaporator disposed therein, and a heat exchanger that exchanges heat between a heat medium that circulates in the heat medium circulation circuit and a high-temperature and high-pressure refrigerant gas that circulates in the heat pump cycle / The heat medium heat exchanger is any one of the heat exchangers described above.
　第２の態様によれば、放熱器に熱媒体を循環する熱媒体循環回路内を循環する熱媒体と、ヒートポンプサイクル内を循環する高温高圧の冷媒ガスとを熱交換する冷媒／熱媒体熱交換器が、上述のいずれかの熱交換器とされている。そのため、熱媒体循環回路内を循環する熱媒体とヒートポンプサイクル内を循環する高温高圧の冷媒ガスとを、高圧仕様の小型高性能化された冷媒／熱媒体熱交換器で扁平チューブのチューブ壁を介して直接熱交換し、高温高圧の冷媒ガスにより熱媒体を加熱して放熱器に供給することができる。従って、放熱器に供給する熱媒体をＰＴＣヒータ等によって加熱し、それを暖房用熱源とする空調装置に比べ、エネルギー効率を格段に向上させることができ、空調装置での電力消費量を低減して車両の航続走行距離を延ばすことができるとともに、また、現行システムのＨＶＡＣユニットをそのまま利用することができ、開発費用を節減することができる。 According to the second aspect, the refrigerant / heat medium heat exchange that exchanges heat between the heat medium that circulates in the heat medium circuit that circulates the heat medium to the radiator and the high-temperature and high-pressure refrigerant gas that circulates in the heat pump cycle. The vessel is one of the heat exchangers described above. For this reason, the heat transfer medium circulating in the heat transfer circuit and the high-temperature and high-pressure refrigerant gas circulating in the heat pump cycle are combined with a high-pressure, compact, high-performance refrigerant / heat transfer medium heat exchanger to change the tube wall of the flat tube. The heat medium can be directly exchanged through heat, and the heat medium can be heated by the high-temperature and high-pressure refrigerant gas and supplied to the radiator. Therefore, compared to an air conditioner that heats the heat medium supplied to the radiator with a PTC heater or the like and uses it as a heat source for heating, the energy efficiency can be greatly improved, and the power consumption in the air conditioner is reduced. Thus, the cruising distance of the vehicle can be extended, and the HVAC unit of the current system can be used as it is, thereby reducing development costs.
　本発明の熱交換器によると、冷媒用扁平チューブおよび熱媒体用扁平チューブ内を流通する冷媒と熱媒体とを互いに接合されている扁平チューブのチューブ壁を介して直接熱交換し、冷媒により熱媒体を加熱または冷却することができるとともに、多層に積層された扁平チューブの扁平面同士が互いに接合された構成とされることから、それぞれの扁平チューブの耐圧性を高めることができる。そのため、空気やフィンを介在して２媒体を熱交換するものに比べ、熱交換効率を向上させ、熱交換器を小型高性能化することができるとともに、高温高圧の冷媒ガスと熱媒体とを熱交換する暖房熱源用の高圧仕様の冷媒／熱媒体熱交換器にも有効に適用することができる。 According to the heat exchanger of the present invention, the refrigerant circulating through the flat tube for refrigerant and the flat tube for heat medium and the heat medium are directly heat-exchanged through the tube walls of the flat tubes joined to each other, and heat is generated by the refrigerant. The medium can be heated or cooled, and the flat surfaces of the flat tubes stacked in multiple layers are joined to each other, so that the pressure resistance of each flat tube can be increased. Therefore, compared to the heat exchange between two media through air or fins, the heat exchange efficiency can be improved, the heat exchanger can be made smaller and more efficient, and the high-temperature and high-pressure refrigerant gas and the heat medium can be combined. The present invention can also be effectively applied to a high-pressure refrigerant / heat medium heat exchanger for a heating heat source for heat exchange.
　本発明の車両用空調装置によると、熱媒体循環回路内を循環する熱媒体とヒートポンプサイクル内を循環する高温高圧の冷媒ガスとを、高圧仕様の小型高性能化された冷媒／熱媒体熱交換器で扁平チューブのチューブ壁を介して直接熱交換し、高温高圧の冷媒ガスにより熱媒体を加熱して放熱器に供給することができる。そのため、放熱器に供給する熱媒体をＰＴＣヒータ等によって加熱し、それを暖房用熱源とする空調装置に比べ、エネルギー効率を格段に向上させることができ、空調装置での電力消費量を低減して車両の航続走行距離を延ばすことができるとともに、現行システムのＨＶＡＣユニットをそのまま利用することができ、開発費用を節減することができる。 According to the vehicle air conditioner of the present invention, the heat medium circulating in the heat medium circulation circuit and the high-temperature and high-pressure refrigerant gas circulating in the heat pump cycle are reduced in size and performance of refrigerant / heat medium heat exchange with high-pressure specifications. The heat exchanger can directly exchange heat through the tube wall of the flat tube, and the heat medium can be heated by the high-temperature and high-pressure refrigerant gas and supplied to the radiator. Therefore, compared to an air conditioner that heats the heat medium supplied to the radiator with a PTC heater or the like and uses it as a heat source for heating, the energy efficiency can be significantly improved, and the power consumption in the air conditioner is reduced. As a result, the cruising range of the vehicle can be extended, and the HVAC unit of the current system can be used as it is, thereby reducing development costs.
本発明の第１実施形態に係る熱交換器の分解斜視図である。It is a disassembled perspective view of the heat exchanger which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る熱交換器の正面図（Ａ）および平面図（Ｂ）である。It is the front view (A) and top view (B) of the heat exchanger which concern on 2nd Embodiment of this invention. 図１または２に示す熱交換器を用いた車両用空調装置の構成図である。It is a block diagram of the vehicle air conditioner using the heat exchanger shown in FIG.
　以下に、本発明にかかる実施形態について、図面を参照して説明する。
［第１実施形態］
　以下、本発明の第１実施形態について、図１を用いて説明する。
　図１には、本発明の第１実施形態に係る熱交換器の分解斜視図が示されている。
　熱交換器１は、冷媒、特に圧縮機から吐出された高温高圧の冷媒ガスと、クーラント等の熱媒体とを直接熱交換して、冷媒により熱媒体を加熱する冷媒／熱媒体熱交換器とされたものであり、高温高圧冷媒ガスを流通する冷媒用扁平チューブ２と、熱媒体を流通する熱媒体用扁平チューブ３とを備えている。 Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is an exploded perspective view of the heat exchanger according to the first embodiment of the present invention.
The heat exchanger 1 is a refrigerant / heat medium heat exchanger that directly heat-exchanges a refrigerant, particularly high-temperature and high-pressure refrigerant gas discharged from a compressor, and a heat medium such as a coolant, and heats the heat medium with the refrigerant. The refrigerant | coolant flat tube 2 which distribute | circulates a high temperature / high pressure refrigerant gas and the heat medium flat tube 3 which distribute | circulates a heat medium are provided.
　冷媒用扁平チューブ２および熱媒体用扁平チューブ３は、同一構成の扁平チューブを使用することができ、例えば、チューブ内に仕切り壁によって仕切られた多数の分離された流路が設けられているアルミ合金製の押出し成形チューブ、あるいは薄いアルミ合金製の板材を成形した一対の成形プレートを重ね合わせ、その内部に薄いアルミ合金製の板材を波形に成形したインナーフィンを挿入し、一体に接合することによって多数の分離された流路を形成している積層プレートタイプのチューブ等を使用することができる。 The refrigerant flat tube 2 and the heat medium flat tube 3 can use flat tubes having the same configuration. For example, aluminum in which a large number of separated flow paths partitioned by a partition wall are provided in the tube. An alloy extruded tube or a pair of molded plates made of a thin aluminum alloy plate are stacked, and an inner fin formed by corrugating a thin aluminum alloy plate is inserted inside and joined together. Therefore, it is possible to use a laminated plate type tube or the like forming a large number of separated flow paths.
　これらの冷媒用扁平チューブ２および熱媒体用扁平チューブ３は、例えば厚さが１ｍｍ～２ｍｍ程度、幅が１０ｍｍ～３０ｍｍ程度の扁平なチューブとされ、所定の長さに切断されて使用されるようになっており、表面にろう付けするためのろう材がクラッドされた構成とされている。また、所定の長さに切断された冷媒用扁平チューブ２および熱媒体用扁平チューブ３の両端には、後述する冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９に接続するための挿入部４，５が設けられている。 The refrigerant flat tube 2 and the heat medium flat tube 3 are, for example, flat tubes having a thickness of about 1 mm to 2 mm and a width of about 10 mm to 30 mm, and are used after being cut to a predetermined length. The brazing material for brazing on the surface is clad. Further, both ends of the refrigerant flat tube 2 and the heat medium flat tube 3 cut to a predetermined length are connected to refrigerant side header tanks 6 and 7 and heat medium side header tanks 8 and 9, which will be described later. Insertions 4 and 5 are provided.
　冷媒用扁平チューブ２および熱媒体用扁平チューブ３は、それぞれ複数本の扁平チューブが交互に多層に積層され、後述するように炉中でろう付けされることによって冷媒用扁平チューブ２および熱媒体用扁平チューブ３の扁平面同士が互いに接合されるようになっている。この冷媒用扁平チューブ２および熱媒体用扁平チューブ３の両端には、それぞれ一対の冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９が、それぞれ挿入部４，５を介して接続されるようになっている。 The refrigerant flat tube 2 and the heat medium flat tube 3 are each formed by alternately laminating a plurality of flat tubes and brazing them in a furnace as will be described later. The flat surfaces of the flat tube 3 are joined to each other. A pair of refrigerant side header tanks 6 and 7 and heat medium side header tanks 8 and 9 are respectively connected to both ends of the refrigerant flat tube 2 and the heat medium flat tube 3 through insertion portions 4 and 5, respectively. It has become so.
　冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９は、それぞれパイプ状のヘッダタンクが互いに平行に配置されており、その平行な対向面にそれぞれ冷媒用扁平チューブ２の両端に設けられている挿入部４が挿入される横長のチューブ挿入穴１０および熱媒体用扁平チューブ３の両端に設けられている挿入部５が挿入される横長のチューブ挿入穴１１が設けられた構成とされている。冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９もアルミ合金製とされている。 The refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 have pipe-shaped header tanks arranged in parallel to each other, and are provided at opposite ends of the refrigerant flat tube 2 on their parallel opposing surfaces. The horizontally long tube insertion hole 10 into which the insertion portion 4 is inserted and the horizontally long tube insertion hole 11 into which the insertion portions 5 provided at both ends of the flat tube 3 for heat medium are inserted are provided. Yes. The refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 are also made of aluminum alloy.
　ここでは、冷媒側ヘッダタンク６が冷媒入口側のヘッダタンクとされ、図示省略の冷媒入口部が設けられており、冷媒側ヘッダタンク７が冷媒出口側のヘッダタンクとされ、図示省略の冷媒出口部が設けられた構成とされている。同様に、熱媒体側ヘッダタンク８が熱媒体入口側のヘッダタンクとされ、図示省略の熱媒体入口部が設けられており、熱媒体側ヘッダタンク９が熱媒体出口側のヘッダタンク部とされ、図示省略の熱媒体出口部が設けられた構成とされており、実線矢印で示されるように、冷媒および熱媒体が流通されるようになっている。 Here, the refrigerant side header tank 6 is a header tank on the refrigerant inlet side, a refrigerant inlet portion (not shown) is provided, the refrigerant side header tank 7 is a header tank on the refrigerant outlet side, and a refrigerant outlet (not shown) is shown. It is set as the structure by which the part was provided. Similarly, the heat medium side header tank 8 is a header tank on the heat medium inlet side, a heat medium inlet part (not shown) is provided, and the heat medium side header tank 9 is a header tank part on the heat medium outlet side. In addition, a heat medium outlet portion (not shown) is provided, and the refrigerant and the heat medium are circulated as indicated by solid arrows.
　なお、本実施形態では、冷媒側ヘッダタンク６および熱媒体側ヘッダタンク８が冷媒および熱媒体の入口側ヘッダタンク、冷媒側ヘッダタンク７および熱媒体側ヘッダタンク９が冷媒および熱媒体の出口側ヘッダタンクとされた並行流型の冷媒／熱媒体熱交換器（熱交換器）１が示されているが、一方の媒体の出・入口側ヘッダタンクの入口側および出口側を逆、例えば熱媒体をヘッダタンク９からヘッダタンク８側に流通するようにし、対向流型の冷媒／熱媒体熱交換器（熱交換器）１としてもよいことはもちろんである。 In the present embodiment, the refrigerant side header tank 6 and the heat medium side header tank 8 are the refrigerant and heat medium inlet side header tank, and the refrigerant side header tank 7 and the heat medium side header tank 9 are the refrigerant and heat medium outlet side. Although a parallel flow type refrigerant / heat medium heat exchanger (heat exchanger) 1 is shown as a header tank, the inlet side and the outlet side of the header tank of one medium are reversed, for example, heat It goes without saying that the medium may be circulated from the header tank 9 to the header tank 8 side to form a counter flow type refrigerant / heat medium heat exchanger (heat exchanger) 1.
　上記の冷媒／熱媒体熱交換器（熱交換器）１は、組み立て冶具を用い、冷媒用扁平チューブ２および熱媒体用扁平チューブ３を、それぞれ複数本ずつ交互に多層に積層し、その冷媒用扁平チューブ２の両端の挿入部４にチューブ挿入穴１０を介して冷媒側ヘッダタンク６，７を挿し込むとともに、熱媒体用扁平チューブ３の両端の挿入部５にチューブ挿入穴１１を介して熱媒体側ヘッダタンク８，９を挿し込むことによって、冷媒用扁平チューブ２、熱媒体用扁平チューブ３、冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９を仮組み立てすることができる。 The refrigerant / heat-medium heat exchanger (heat exchanger) 1 uses an assembly jig, and a plurality of flat refrigerant tubes 2 and flat tubes 3 for heat medium are alternately stacked in multiple layers, respectively. The refrigerant side header tanks 6 and 7 are inserted into the insertion portions 4 at both ends of the flat tube 2 through the tube insertion holes 10, and heat is inserted into the insertion portions 5 at both ends of the flat tube 3 for heat medium through the tube insertion holes 11. By inserting the medium side header tanks 8 and 9, the refrigerant flat tube 2, the heat medium flat tube 3, the refrigerant side header tanks 6 and 7, and the heat medium side header tanks 8 and 9 can be temporarily assembled.
　この仮組み立てした冷媒／熱媒体熱交換器１を炉中に入れ、所定温度に加熱することにより、冷媒用扁平チューブ２および熱媒体用扁平チューブ３の表面にクラッドされているろう材を溶かし、そのろう材で冷媒用扁平チューブ２および熱媒体用扁平チューブ３の扁平面同士、冷媒用扁平チューブ２と冷媒側ヘッダタンク６，７との間および熱媒体用扁平チューブ３と熱媒体側ヘッダタンク８，９との間をそれぞれろう付けして一体的に密封接合することにより、冷媒／熱媒体熱交換器１を製造することができる。 The temporarily assembled refrigerant / heat medium heat exchanger 1 is placed in a furnace and heated to a predetermined temperature to melt the brazing material clad on the surfaces of the refrigerant flat tube 2 and the heat medium flat tube 3, With the brazing material, the flat surfaces of the refrigerant flat tube 2 and the heat medium flat tube 3, the space between the refrigerant flat tube 2 and the refrigerant side header tanks 6 and 7, and the heat medium flat tube 3 and the heat medium side header tank. The refrigerant / heat-medium heat exchanger 1 can be manufactured by brazing between 8 and 9 and integrally sealing and joining them.
　また、冷媒／熱媒体熱交換器１は、冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９内に、その長さ方向に沿って、複数本のチューブ群毎に冷媒および熱媒体を分配する１以上の仕切り板１２を設け、入口側のヘッダタンクである冷媒側ヘッダタンク６および熱媒体側ヘッダタンク８に流入された冷媒および熱媒体が、出口側ヘッダタンクである冷媒側ヘッダタンク７および熱媒体側ヘッダタンク９から流出される間に、両ヘッダタンク間を１回以上ターンして流通されるようにパス割りした構成としてもよい。この場合、仕切り板１２の設置数により偶数にパス割りした場合、同じヘッダタンクに冷媒、熱媒体の出・入口が設けられ、奇数にパス割りした場合、対向する一方のヘッダタンク側に冷媒、熱媒体の入口、他方のヘッダタンク側に冷媒、熱媒体の出口が設けられることになる。 Further, the refrigerant / heat medium heat exchanger 1 is arranged in the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 along the length direction of the refrigerant and heat medium for each of a plurality of tube groups. One or more partition plates 12 are provided to distribute the refrigerant, and the refrigerant and the heat medium flowing into the refrigerant side header tank 6 and the heat medium side header tank 8 that are the inlet side header tank are the refrigerant side header that is the outlet side header tank. While flowing out from the tank 7 and the heat medium side header tank 9, it is good also as a structure which divided | segmented path | pass so that it may distribute | circulate by turning between both header tanks one or more times. In this case, when the number of partitions 12 is divided into even numbers, the same header tank is provided with refrigerant and heat medium inlet / outlet. The inlet of the heat medium and the outlet of the refrigerant and the heat medium are provided on the other header tank side.
　さらに、上記冷媒／熱媒体熱交換器１において、熱媒体が流通する熱媒体用扁平チューブ３および熱媒体側ヘッダタンク８，９の内部流路側に、犠牲防食層を設けた構成としている。このように、内部流路を流通する熱媒体に対する腐食防止対策を施工し、様々な媒体が用いられ、また混入される可能性がある熱媒体に対して耐食性を確保しておくことが望ましい。 Further, in the refrigerant / heat medium heat exchanger 1, a sacrificial anticorrosion layer is provided on the heat medium flat tube 3 through which the heat medium flows and the internal flow path side of the heat medium side header tanks 8 and 9. As described above, it is desirable to take measures to prevent corrosion of the heat medium flowing through the internal flow path, and to ensure corrosion resistance against the heat medium in which various media are used and possibly mixed.
　このように、本実施形態によると、高温高圧の冷媒ガスと熱媒体とを互いに熱交換する冷媒／熱媒体熱交換器１であって、複数の冷媒が流通される冷媒用扁平チューブ２と、複数の熱媒体が流通される熱媒体用扁平チューブ３とを交互に多層に積層し、それを互いにろう付け接合するとともに、これら複数の冷媒用扁平チューブ２および熱媒体用扁平チューブ３の両端に、それぞれ冷媒および熱媒体を分配および集合する一対の冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９が設けられた構成とされている。 Thus, according to the present embodiment, the refrigerant / heat medium heat exchanger 1 that exchanges heat between the high-temperature and high-pressure refrigerant gas and the heat medium, the refrigerant flat tube 2 through which a plurality of refrigerants are circulated, The heat medium flat tubes 3 through which a plurality of heat media are circulated are alternately laminated in multiple layers and brazed to each other, and are attached to both ends of the plurality of refrigerant flat tubes 2 and the heat medium flat tubes 3. The pair of refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 for distributing and collecting the refrigerant and the heat medium are provided.
　このため、冷媒用扁平チューブ２および熱媒体用扁平チューブ３内を流通する高温高圧冷媒と熱媒体とを互いにろう付け接合されている冷媒用扁平チューブ２および熱媒体用扁平チューブ３のチューブ壁を介して直接熱交換し、高温高圧冷媒により熱媒体を加熱することができる。それとともに、多層に積層された冷媒用扁平チューブ２および熱媒体用扁平チューブ３の扁平面同士が互いにろう付け接合された構成とされていることから、冷媒用扁平チューブ２および熱媒体用扁平チューブ３のそれぞれの耐圧性を高めることができる。 For this reason, the tube walls of the refrigerant flat tube 2 and the heat medium flat tube 3 in which the high-temperature and high-pressure refrigerant flowing through the refrigerant flat tube 2 and the heat medium flat tube 3 and the heat medium are brazed to each other are joined. The heat medium can be heated directly by the high-temperature and high-pressure refrigerant. At the same time, since the flat surfaces of the refrigerant flat tube 2 and the heat medium flat tube 3 stacked in multiple layers are brazed to each other, the refrigerant flat tube 2 and the heat medium flat tube are combined. 3 can be improved in pressure resistance.
　これによって、空気やフィンを介在して２媒体を熱交換するものに比べ、熱交換効率を向上し、冷媒／熱媒体熱交換器１を小型高性能化することができるとともに、高温高圧の冷媒ガスと熱媒体とを熱交換する暖房熱源用の高圧仕様の冷媒／熱媒体熱交換器１にも有効に適用することができる。 As a result, the heat exchange efficiency can be improved and the refrigerant / heat medium heat exchanger 1 can be reduced in size and performance as compared with the case where heat is exchanged between the two media via air or fins, and a high-temperature and high-pressure refrigerant can be obtained. The present invention can also be effectively applied to a high-pressure refrigerant / heat medium heat exchanger 1 for a heating heat source that exchanges heat between a gas and a heat medium.
　また、冷媒用扁平チューブ２および熱媒体用扁平チューブ３並びに冷媒用扁平チューブ２および熱媒体用扁平チューブ３が接続される冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９のうち、少なくとも冷媒用扁平チューブ２および熱媒体用扁平チューブ３が、表面にろう材がクラッドされた構成とされ、各々が互いにろう付け接合により一体化されている。 Further, of the refrigerant flat tubes 2 and the heat medium flat tubes 3, the refrigerant flat tubes 2 and the heat medium flat tubes 3, and the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9, At least the refrigerant flat tube 2 and the heat medium flat tube 3 have a structure in which a brazing material is clad on the surface, and each is integrated by brazing joint.
　このため、ろう材がクラッドされている冷媒用扁平チューブ２および熱媒体用扁平チューブ３と冷媒用ヘッダタンク６，７および熱媒体用ヘッダタンク８，９とを仮組み立てし、それを炉中でろう付けすることによって一体的に組み付け接合することができる。従って、ろう材を介して接合された冷媒用扁平チューブ２および熱媒体用扁平チューブ３同士の熱伝導により直接冷媒と熱媒体とを熱交換でき、伝熱ロスを最小化して熱交換効率を向上させることができるとともに、冷媒／熱媒体熱交換器１を効率よく生産することができる。 For this reason, the refrigerant flat tube 2 and the heat medium flat tube 3 clad with the brazing material, the refrigerant header tanks 6 and 7 and the heat medium header tanks 8 and 9 are temporarily assembled, and they are placed in the furnace. By brazing, they can be assembled and joined together. Therefore, the refrigerant and the heat medium can be directly heat-exchanged by heat conduction between the refrigerant flat tube 2 and the heat medium flat tube 3 joined via the brazing material, and heat transfer loss is minimized to improve heat exchange efficiency. In addition, the refrigerant / heat medium heat exchanger 1 can be produced efficiently.
　さらに、上記冷媒用扁平チューブ２および／または熱媒体用扁平チューブ３が、押出し成形品もしくはインナーフィンを挿入した積層プレートタイプの扁平チューブとされているため、冷媒用扁平チューブ２および／または熱媒体用扁平チューブ３を押出し成形品もしくはインナーフィンを挿入した積層プレートタイプのチューブとすることにより、冷媒用扁平チューブ２および熱媒体用扁平チューブ３のそれぞれを耐圧性の高いチューブとすることができる。従って、耐圧性を確保し易く、特に高温高圧の冷媒ガスと熱媒体とを熱交換する暖房熱源用の高圧仕様の冷媒／熱媒体熱交換器１に有効に適用することができる。 Further, since the refrigerant flat tube 2 and / or the heat medium flat tube 3 is an extruded product or a laminated plate type flat tube into which an inner fin is inserted, the refrigerant flat tube 2 and / or the heat medium. By making the flat tube 3 for use into an extrusion molded product or a laminated plate type tube into which an inner fin is inserted, each of the flat tube 2 for refrigerant and the flat tube 3 for heat medium can be made a high pressure-resistant tube. Therefore, it is easy to ensure pressure resistance, and it can be effectively applied to the high-pressure refrigerant / heat medium heat exchanger 1 for a heating heat source that exchanges heat between a high-temperature and high-pressure refrigerant gas and a heat medium.
　また、本実施形態では、冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９に、その長さ方向に沿って複数本の冷媒用扁平チューブ２および熱媒体用扁平チューブ３群毎に冷媒および熱媒体を分配する少なくとも１以上の仕切り板１２を設け、冷媒および熱媒体が入口から出口に至る間に１回以上ターンして流通するようにパス割りしている。このため、パス割りされた複数本の冷媒用扁平チューブ２および熱媒体用扁平チューブ３群に対して、冷媒および熱媒体を１回以上ターンさせて蛇行するように流通させ、両媒体を互いに十分時間をかけて熱交換させることができる。従って、熱交換率を向上し、熱交換器１をより高性能化することができる。 Further, in the present embodiment, the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 are divided into a plurality of refrigerant flat tubes 2 and heat medium flat tubes 3 along the length direction. At least one or more partition plates 12 for distributing the refrigerant and the heat medium are provided, and the path is divided so that the refrigerant and the heat medium are circulated one or more times from the inlet to the outlet. For this reason, the refrigerant and the heat medium are circulated in a meandering manner by turning the refrigerant and the heat medium one or more times through the plurality of refrigerant flat tubes 2 and the heat medium flat tubes 3 divided by the pass, Heat can be exchanged over time. Therefore, a heat exchange rate can be improved and the heat exchanger 1 can be improved in performance.
　さらに、本実施形態では、熱媒体用扁平チューブ３および熱媒体側ヘッダタンク８，９における熱媒体が流通する内部流路側に、犠牲防食層が設けられているため、熱媒体が流通する熱媒体用扁平チューブ３および熱媒体側ヘッダタンク８，９の内部流路の腐食を犠牲防食層により防止することができる。従って、様々な媒体が用いられ、または混入される可能性がある熱媒体による内部流路の腐食を防止し、熱交換器１の耐食性を向上することができる。 Furthermore, in this embodiment, since the sacrificial anticorrosion layer is provided in the internal flow path through which the heat medium flows in the heat medium flat tube 3 and the heat medium header tanks 8 and 9, the heat medium through which the heat medium flows. The sacrificial anticorrosion layer can prevent corrosion of the internal flow paths of the flat tube 3 for use and the heat medium side header tanks 8 and 9. Therefore, corrosion of the internal flow path due to the heat medium that may be used or mixed with various media can be prevented, and the corrosion resistance of the heat exchanger 1 can be improved.
［第２実施形態］
　次に、本発明の第２実施形態について、図２（Ａ），（Ｂ）を用いて説明する。
　本実施形態は、上記した第１実施形態に対して、ヘッダタンク２１，２２の構成が異なっている。その他の点については、第１実施形態と同様であるので説明は省略する。
　本実施形態では、冷媒用扁平チューブ２および熱媒体用扁平チューブ３の両端に設けられるヘッダタンク２１，２２が、内部に仕切り２３，２４が設けられ、内部が冷媒側ヘッダタンク部２５，２６と熱媒体側ヘッダタンク部２７，２８とに区画された一体型ヘッダタンク２１，２２とされている。この一体型ヘッダタンク２１，２２は、押出し成形品により構成されている。 [Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
This embodiment differs in the structure of the header tanks 21 and 22 with respect to above-described 1st Embodiment. Since other points are the same as those in the first embodiment, description thereof will be omitted.
In this embodiment, the header tanks 21 and 22 provided at both ends of the refrigerant flat tube 2 and the heat medium flat tube 3 are provided with partitions 23 and 24 inside, and the inside is formed with the refrigerant side header tank portions 25 and 26. The integrated header tanks 21 and 22 are partitioned into heat medium side header tank portions 27 and 28. The integrated header tanks 21 and 22 are made of extruded products.
　ここでは、一体型ヘッダタンク２１，２２の外部側が冷媒側ヘッダタンク部２５，２６とされ、内部側が熱媒体側ヘッダタンク部２７，２８とされており、冷媒用扁平チューブ２の両端は、熱媒体側ヘッダタンク部２７，２８および仕切り２３，２４を貫通して冷媒側ヘッダタンク部２５，２６に接続される。また、熱媒体用扁平チューブ３の両端は、熱媒体側ヘッダタンク部２７，２８に接続された構成とされている。ただし、逆に外部側を熱媒体側ヘッダタンク部２７，２８、内部側を冷媒側ヘッダタンク部２５，２６とした構成としてもよいことはもちろんである。 Here, the external sides of the integrated header tanks 21 and 22 are refrigerant side header tank portions 25 and 26, the internal sides are heat medium side header tank portions 27 and 28, and both ends of the refrigerant flat tube 2 are heated. The medium side header tank parts 27 and 28 and the partitions 23 and 24 are connected to the refrigerant side header tank parts 25 and 26. Further, both ends of the heat medium flat tube 3 are connected to the heat medium side header tank portions 27 and 28. However, it goes without saying that the heat medium side header tank portions 27 and 28 may be provided on the outside side and the refrigerant side header tank portions 25 and 26 may be provided on the inside side.
　このように、冷媒側のヘッダタンクおよび熱媒体側のヘッダタンクを、仕切り２３，２４を介して内部が冷媒側ヘッダタンク部２５，２６と熱媒体側ヘッダタンク部２７，２８とに区画された一体型ヘッダタンク２１，２２により構成することができる。そのため、ヘッダタンクの数を一体型ヘッダタンク２１，２２とすることによって半減することができるとともに、一体型ヘッダタンク２１，２２内においても両媒体間の熱交換を促進することができる。従って、部品数の低減および伝熱面積の増大により、冷媒／熱媒体熱交換器１をより高性能化することができる。 Thus, the refrigerant side header tank and the heat medium side header tank are partitioned into the refrigerant side header tank parts 25 and 26 and the heat medium side header tank parts 27 and 28 through the partitions 23 and 24. The integrated header tanks 21 and 22 can be used. Therefore, the number of header tanks can be halved by using the integrated header tanks 21 and 22, and heat exchange between both media can be promoted in the integrated header tanks 21 and 22. Therefore, the refrigerant / heat medium heat exchanger 1 can be improved in performance by reducing the number of parts and increasing the heat transfer area.
［第３実施形態］
　次に、本発明の第３実施形態について、図３を用いて説明する。
　本実施形態は、上記した第１および第２実施形態に示された熱交換器（冷媒／熱媒体熱交換器）１を適用したヒートポンプ式の車両用空調装置３０に係るものである。
　ヒートポンプ式車両用空調装置３０は、ＨＶＡＣユニット（Ｈｅａｔｉｎｇ　Ｖｅｎｔｉｌａｔｉｏｎ　ａｎｄ　Ａｉｒ　Ｃｏｎｄｉｔｉｏｎｉｎｇ　Ｕｎｉｔ）３１と、熱媒体循環回路３２と、ヒートポンプサイクル３３と、を備えている。また、熱媒体循環回路３２に四方切換弁３４を介して接続されたエンジン、モータ等の冷却水循環回路３５を備えている。 [Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG.
The present embodiment relates to a heat pump type vehicle air conditioner 30 to which the heat exchanger (refrigerant / heat medium heat exchanger) 1 shown in the first and second embodiments described above is applied.
The heat pump vehicle air conditioner 30 includes an HVAC unit (Heating Ventilation and Air Conditioning Unit) 31, a heat medium circulation circuit 32, and a heat pump cycle 33. Further, a cooling water circulation circuit 35 such as an engine or a motor connected to the heat medium circulation circuit 32 via a four-way switching valve 34 is provided.
　ＨＶＡＣユニット３１は、空気流路３６を形成するケーシング３７内に、車室内の内気または外気を吸気して循環するブロア３８と、暖房補助用のＰＴＣヒータ３９と、エバポレータ４０と、放熱器４１とを順次配設した構成とされ、ブロア３８により循環される内気または外気をＰＴＣヒータ３９、エバポレータ４０、放熱器４１等で冷却、加熱または除湿して車内に吹出す構成とされている。このＨＶＡＣユニット３１には、公知の現行システムのものをそのまま適用することができる。 The HVAC unit 31 includes a blower 38 that sucks and circulates inside air or outside air in the vehicle interior, a PTC heater 39 for heating assistance, an evaporator 40, and a radiator 41. The inside air or the outside air circulated by the blower 38 is cooled, heated or dehumidified by the PTC heater 39, the evaporator 40, the radiator 41, etc., and blown out into the vehicle. A known current system can be applied to the HVAC unit 31 as it is.
　熱媒体循環回路３２は、冷媒／熱媒体熱交換器１で加熱された熱媒体をＨＶＡＣユニット３１の放熱器４１へと循環するためのものであり、熱媒体循環ポンプ４２、四方切換弁３４、上記冷媒／熱媒体熱交換器１、放熱器４１、バッファタンク４３を順次配管接続した構成とされている。また、熱媒体循環回路３２に上記冷媒／熱媒体熱交換器１を設置するに当たり、熱交換器１のコア部、すなわち冷媒用扁平チューブ２、熱媒体用扁平チューブ３、冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９または一体型ヘッダタンク２１，２２等のコア部を、断熱性の筐体４４内部に格納して設置し、熱交換器１のコア部から周囲空気への熱移動を遮蔽するようにしている。 The heat medium circulation circuit 32 circulates the heat medium heated by the refrigerant / heat medium heat exchanger 1 to the radiator 41 of the HVAC unit 31, and includes a heat medium circulation pump 42, a four-way switching valve 34, The refrigerant / heat medium heat exchanger 1, the radiator 41, and the buffer tank 43 are sequentially connected by piping. Further, when installing the refrigerant / heat medium heat exchanger 1 in the heat medium circuit 32, the core of the heat exchanger 1, that is, the refrigerant flat tube 2, the heat medium flat tube 3, the refrigerant side header tank 6, 7 and the heat medium side header tanks 8 and 9 or the integrated header tanks 21 and 22 and the like are housed and installed in the heat-insulating housing 44, and the heat exchanger 1 is connected to the ambient air from the core portion. The heat transfer is shielded.
　ヒートポンプサイクル３３は、冷媒圧縮機４５、三方切替え弁４６、車外コンデンサ４７、レシーバ４８、膨張弁４９、エバポレータ４０を順次配管接続して冷房用サイクルを構成するとともに、三方切替え弁４６とレシーバ４８との間に、車外コンデンサ４７と並列に凝縮器（コンデンサ）として機能する冷媒／熱媒体熱交換器１を接続し、冷媒圧縮機４５、三方切替え弁４６、冷媒／熱媒体熱交換器１、レシーバ４８、膨張弁４９、エバポレータ４０により、ヒートポンプ暖房サイクルが構成可能とされたものである。 The heat pump cycle 33 includes a refrigerant compressor 45, a three-way switching valve 46, an external condenser 47, a receiver 48, an expansion valve 49, and an evaporator 40 in order to form a cooling cycle, and the three-way switching valve 46 and the receiver 48. The refrigerant / heat medium heat exchanger 1 functioning as a condenser (condenser) is connected in parallel with the external condenser 47 between the refrigerant compressor 45, the three-way switching valve 46, the refrigerant / heat medium heat exchanger 1, and the receiver. The heat pump heating cycle can be configured by 48, the expansion valve 49, and the evaporator 40.
　また、冷却水循環回路３５は、エンジンまたはモータ５０、バッファタンク５１、ラジエータ５２、冷却水ポンプ５３等から構成され、その冷却水循環回路３５に四方切換弁３４を経由するバイパス回路５４が接続された構成とされている。なお、ヒートポンプサイクル３３の車外コンデンサ４７および冷却水循環回路３５のラジエータ５２は、平行に並設されており、共通のファン５５を介して通風可能とされている。 The cooling water circulation circuit 35 includes an engine or motor 50, a buffer tank 51, a radiator 52, a cooling water pump 53, and the like, and a bypass circuit 54 via the four-way switching valve 34 is connected to the cooling water circulation circuit 35. It is said that. The external condenser 47 of the heat pump cycle 33 and the radiator 52 of the cooling water circulation circuit 35 are arranged in parallel, and can be ventilated through a common fan 55.
　上記のヒートポンプ式車両用空調装置３０によると、冷媒圧縮機４５で圧縮した冷媒を三方切替え弁４６により、車外コンデンサ４７、レシーバ４８、膨張弁４９、エバポレータ４０の順に冷房サイクル内循環させ、エバポレータ４０でブロア３８が送風される空気を冷却することにより冷房に供することができる。また、冷媒圧縮機４５で圧縮した冷媒を三方切替え弁４６により、冷媒／熱媒体熱交換器１、レシーバ４８、膨張弁４９、エバポレータ４０の順にヒートポンプ暖房サイクル内を循環させ、冷媒／熱媒体熱交換器１を凝縮器として機能させて高温高圧の冷媒ガスにより熱媒体を加熱する。そして、その熱媒体を熱媒体循環回路３２により放熱器４１に循環させることにより、エバポレータ４０を経た空気を放熱器４１で加熱し、暖房または除湿に供することができる。 According to the heat pump type vehicle air conditioner 30 described above, the refrigerant compressed by the refrigerant compressor 45 is circulated in the cooling cycle by the three-way switching valve 46 in the order of the external capacitor 47, the receiver 48, the expansion valve 49, and the evaporator 40. The air blown by the blower 38 can be cooled for cooling. Further, the refrigerant compressed by the refrigerant compressor 45 is circulated through the heat pump heating cycle in the order of the refrigerant / heat medium heat exchanger 1, the receiver 48, the expansion valve 49, and the evaporator 40 by the three-way switching valve 46, and the refrigerant / heat medium heat is circulated. The exchanger 1 is caused to function as a condenser, and the heat medium is heated by the high-temperature and high-pressure refrigerant gas. Then, the heat medium is circulated to the radiator 41 by the heat medium circulation circuit 32, so that the air passing through the evaporator 40 can be heated by the radiator 41 and used for heating or dehumidification.
　従って、本実施形態によると、熱媒体循環回路３２内を循環する熱媒体とヒートポンプサイクル３３内を循環する高温高圧の冷媒ガスとを、高圧仕様の小型高性能化された冷媒／熱媒体熱交換器１で冷媒用扁平チューブ２および熱媒体用扁平チューブ３のチューブ壁を介して直接熱交換し、高温高圧の冷媒ガスにより熱媒体を加熱して放熱器４１に供給することができる。従って、放熱器４１に供給する熱媒体をＰＴＣヒータ等により加熱し、それを暖房用熱源とする空調装置に比べ、エネルギー効率を格段に向上させることができ、空調装置３０での電力消費量を低減して車両の航続走行距離を延ばすことができるとともに、現行システムのＨＶＡＣユニット３１をそのまま利用することができ、開発費用を節減することができる。 Therefore, according to the present embodiment, the heat medium circulating in the heat medium circulation circuit 32 and the high-temperature and high-pressure refrigerant gas circulating in the heat pump cycle 33 are converted into a high-pressure, small, high-performance refrigerant / heat medium heat exchanger. The heat exchanger 1 can directly exchange heat through the tube walls of the refrigerant flat tube 2 and the heat medium flat tube 3, heat the heat medium with a high-temperature and high-pressure refrigerant gas, and supply it to the radiator 41. Therefore, compared with an air conditioner that heats the heat medium supplied to the radiator 41 with a PTC heater or the like and uses it as a heat source for heating, the energy efficiency can be greatly improved, and the power consumption in the air conditioner 30 can be reduced. As a result, the cruising distance of the vehicle can be extended, and the HVAC unit 31 of the current system can be used as it is, thereby reducing development costs.
　また、熱媒体循環回路３２およびヒートポンプサイクル３３間に、冷媒／熱媒体熱交換器（熱交換器）１を設置するに当たり、熱交換器１の冷媒用扁平チューブ２、熱媒体用扁平チューブ３、冷媒側ヘッダタンク６，７および熱媒体側ヘッダタンク８，９または一体型ヘッダタンク２１，２２等のコア部を、断熱性を有する筐体４４内に格納して設置している。このため、熱交換器１のコア部から周囲空気への熱移動を断熱性の筐体４４によって遮蔽することができる。従って、熱ロスを低減し、冷媒の熱を有効に利用して効率よく熱媒体を加熱または冷却することができる。 In installing the refrigerant / heat medium heat exchanger (heat exchanger) 1 between the heat medium circulation circuit 32 and the heat pump cycle 33, the refrigerant flat tube 2, the heat medium flat tube 3 of the heat exchanger 1, Core portions such as the refrigerant side header tanks 6 and 7 and the heat medium side header tanks 8 and 9 or the integrated header tanks 21 and 22 are housed and installed in a case 44 having heat insulation properties. For this reason, the heat transfer from the core portion of the heat exchanger 1 to the ambient air can be shielded by the heat insulating casing 44. Therefore, heat loss can be reduced, and the heat medium can be efficiently heated or cooled by effectively using the heat of the refrigerant.
　なお、本発明は、上記実施形態にかかる発明に限定されるものではなく、その要旨を逸脱しない範囲において、適宜変形が可能である。例えば、上記実施形態では、熱交換器１を冷媒／熱媒体熱交換器に適用し、高温高圧冷媒と熱媒体とを熱交換して熱媒体を加熱する熱交換器に適用した場合の例について説明したが、低圧冷媒と熱媒体とを熱交換し、熱媒体を冷却する冷媒／熱媒体熱交換器に適用してもよいことはもちろんである。 In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the said embodiment, about the example at the time of applying the heat exchanger 1 to a refrigerant | coolant / heat-medium heat exchanger, and applying to a heat exchanger which heat-exchanges a high-temperature / high pressure refrigerant | coolant and a heat medium, and heats a heat medium. Although described, it goes without saying that the present invention may be applied to a refrigerant / heat medium heat exchanger that exchanges heat between a low-pressure refrigerant and a heat medium and cools the heat medium.
１　熱交換器（冷媒／熱媒体熱交換器）
２　冷媒用扁平チューブ
３　熱媒体用扁平チューブ
６，７　冷媒側ヘッダタンク
８，９　熱媒体側ヘッダタンク
１２　仕切り板
２１，２２　一体型ヘッダタンク
２３，２４　仕切り
２５，２６　冷媒側ヘッダタンク部
２７，２８　熱媒体側ヘッダタンク部
３０　車両用空調装置
３１　ＨＶＡＣユニット
３２　熱媒体循環回路
３３　ヒートポンプサイクル
４０　エバポレータ
４１　放熱器
４４　断熱性の筐体 1 Heat exchanger (refrigerant / heat medium heat exchanger)
2 Flat tube for refrigerant 3 Flat tube for heat medium 6, 7 Refrigerant side header tank 8, 9 Heat medium side header tank 12 Partition plates 21, 22 Integrated header tanks 23, 24 Partitions 25, 26 Refrigerant side header tank 27, 28 Heat medium side header tank 30 Vehicle air conditioner 31 HVAC unit 32 Heat medium circulation circuit 33 Heat pump cycle 40 Evaporator 41 Radiator 44 Insulating housing

Claims (9)

  1. 　冷媒と熱媒体とを互いに熱交換する熱交換器であって、
    　複数の冷媒が流通される冷媒用扁平チューブと、複数の熱媒体が流通される熱媒体用扁平チューブとを交互に多層に積層し、互いに接合するとともに、
    　複数の前記冷媒用扁平チューブおよび前記熱媒体用扁平チューブの両端に、それぞれ冷媒および熱媒体を分配および集合する一対の冷媒側ヘッダタンクおよび熱媒体側ヘッダタンクが設けられている熱交換器。     A heat exchanger that exchanges heat between the refrigerant and the heat medium,
    Laminating a flat tube for refrigerant through which a plurality of refrigerants circulate and a flat tube for heat medium through which a plurality of heat media are circulated alternately in multiple layers, joined together,
    A heat exchanger in which a pair of a refrigerant side header tank and a heat medium side header tank for distributing and collecting the refrigerant and the heat medium are provided at both ends of the plurality of flat tubes for the refrigerant and the flat tubes for the heat medium, respectively.
  2. 　前記冷媒用扁平チューブおよび前記熱媒体用扁平チューブ並びに両チューブがそれぞれ接続される前記冷媒側ヘッダタンクおよび前記熱媒体側ヘッダタンクのうち、少なくとも前記冷媒用扁平チューブおよび前記熱媒体用扁平チューブは、表面にろう材がクラッドされた構成とされ、各々が互いにろう付け接合により一体化されている請求項１に記載の熱交換器。 Of the refrigerant side header tank and the heat medium side header tank to which the refrigerant flat tube, the heat medium flat tube, and both tubes are respectively connected, at least the refrigerant flat tube and the heat medium flat tube are: The heat exchanger according to claim 1, wherein a brazing material is clad on the surface, and each is integrated by brazing joint.
  3. 　前記冷媒側ヘッダタンクおよび前記熱媒体側ヘッダタンクは、仕切りを介して内部が冷媒側ヘッダタンク部と熱媒体側ヘッダタンク部とに区画された一体型ヘッダタンクとされている請求項１または２に記載の熱交換器。 The said refrigerant | coolant side header tank and the said heat medium side header tank are made into the integrated header tank by which the inside was divided into the refrigerant | coolant side header tank part and the heat medium side header tank part through the partition. The heat exchanger as described in.
  4. 　前記一体型ヘッダタンクは、押出し成形品により構成されたヘッダタンクとされている請求項３に記載の熱交換器。 The heat exchanger according to claim 3, wherein the integrated header tank is a header tank made of an extruded product.
  5. 　前記冷媒用扁平チューブおよび／または前記熱媒体用扁平チューブは、押出し成形品もしくはインナーフィンを挿入した積層プレートタイプの扁平チューブとされている請求項１から４のいずれかに記載の熱交換器。 The heat exchanger according to any one of claims 1 to 4, wherein the refrigerant flat tube and / or the heat medium flat tube is a laminated plate type flat tube into which an extruded product or an inner fin is inserted.
  6. 　前記冷媒側ヘッダタンクおよび前記熱媒体側ヘッダタンクには、その長さ方向に沿って複数本のチューブ群毎に冷媒および熱媒体を分配する少なくとも１以上の仕切りが設けられ、冷媒および熱媒体が入口から出口に至る間に１回以上ターンして流通されるようにパス割りされている請求項１から５のいずれかに記載の熱交換器。 The refrigerant side header tank and the heat medium side header tank are provided with at least one partition for distributing the refrigerant and the heat medium for each of the plurality of tube groups along the length direction thereof. The heat exchanger according to any one of claims 1 to 5, wherein the heat exchanger is divided so as to be circulated one or more times between the inlet and the outlet.
  7. 　前記熱媒体用扁平チューブおよび前記熱媒体側ヘッダタンクの熱媒体が流通する内部流路側に、犠牲防食層が設けられている請求項１から６のいずれかに記載の熱交換器。 The heat exchanger according to any one of claims 1 to 6, wherein a sacrificial anticorrosive layer is provided on the internal flow path side through which the heat medium of the heat medium flat tube and the heat medium side header tank flows.
  8. 　前記熱交換器の前記冷媒用扁平チューブ、前記熱媒体用扁平チューブ、前記冷媒側ヘッダタンクおよび前記熱媒体側ヘッダタンクからなるコア部が、断熱性の筐体内部に格納されている請求項１から７のいずれかに記載の熱交換器。 The core part which consists of the said flat tube for refrigerant | coolants of the said heat exchanger, the said flat tube for heat media, the said refrigerant | coolant side header tank, and the said heat medium side header tank is stored in the heat insulation housing | casing. To 7. The heat exchanger according to any one of 7 to 7.
  9. 　車室内空気または外気が流通されるＨＶＡＣユニット内に配設されている放熱器に熱媒体を循環する熱媒体循環回路と、
    　前記ＨＶＡＣユニット内に配設されているエバポレータに冷媒を循環するヒートポンプサイクルと、を備え、
    　前記熱媒体循環回路を循環する熱媒体と、前記ヒートポンプサイクル内を循環する高温高圧の冷媒ガスとを熱交換する冷媒／熱媒体熱交換器が、請求項１から８のいずれかに記載の熱交換器とされている車両用空調装置。
     
     
     
     
     
     
          A heat medium circulation circuit that circulates the heat medium to a radiator disposed in the HVAC unit through which the air inside or outside the vehicle is circulated;
    A heat pump cycle that circulates refrigerant to an evaporator disposed in the HVAC unit,
    The heat according to any one of claims 1 to 8, wherein a refrigerant / heat medium heat exchanger that exchanges heat between the heat medium circulating in the heat medium circulation circuit and the high-temperature and high-pressure refrigerant gas circulating in the heat pump cycle. A vehicle air conditioner that is considered to be an exchanger.






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