US20170328615A1 - Refrigerant evaporator - Google Patents

Refrigerant evaporator Download PDF

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Publication number
US20170328615A1
US20170328615A1 US15/536,597 US201615536597A US2017328615A1 US 20170328615 A1 US20170328615 A1 US 20170328615A1 US 201615536597 A US201615536597 A US 201615536597A US 2017328615 A1 US2017328615 A1 US 2017328615A1
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United States
Prior art keywords
tank
refrigerant
heat exchange
exchange part
drainage passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/536,597
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English (en)
Inventor
Masakazu Morimoto
Eiichi Torigoe
Naohisa Ishizaka
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Denso Corp
Original Assignee
Denso Corp
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Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Assigned to DENSO CORPORATION reassignment DENSO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ISHIZAKA, NAOHISA, MORIMOTO, MASAKAZU, TORIGOE, EIICHI
Publication of US20170328615A1 publication Critical patent/US20170328615A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/05308—Assemblies of conduits connected side by side or with individual headers, e.g. section type radiators
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • 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
    • F28D2021/0061—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for phase-change applications
    • F28D2021/0064—Vaporizers, e.g. evaporators

Definitions

  • the present disclosure relates to a refrigerant evaporator in which heat is exchanged between a fluid to be cooled and a refrigerant.
  • Patent Literature 1 describes a refrigerant evaporator.
  • the refrigerant evaporator described in Patent Literature 1 includes a first heat exchange part and a second heat exchange part in which heat is exchanged with air that is a fluid to be cooled.
  • the first heat exchange part and the second heat exchange part are arranged to oppose in a flowing direction of air.
  • the first heat exchange part is divided into a first core part and a second core part in a direction perpendicular to the flowing direction of air.
  • the second heat exchange part is also divided into a first core part and a second core part in a direction perpendicular to the flowing direction of air.
  • the first core part of the first heat exchange part opposes the first core part of the second heat exchange part in the flowing direction of air.
  • the second core part of the first heat exchange part opposes the second core part of the second heat exchange part in the flowing direction of air.
  • the refrigerant evaporator described in Patent Literature 1 includes a pair of tanks disposed at the respective ends of the first heat exchange part in the vertical direction, and a pair of tanks disposed at the respective ends of the second heat exchange part in the vertical direction.
  • the refrigerant evaporator described in Patent Literature 1 includes a switch tank between the tank disposed below the first heat exchange part in the vertical direction and the tank disposed below the second heat exchange part in the vertical direction.
  • refrigerant flows from the tank above the second heat exchange part in the vertical direction to the first core part and the second core part of the second heat exchange part.
  • the refrigerant flowing into the first core part of the second heat exchange part flows from the tank below the second heat exchange part in the vertical direction through the switch tank and the tank below the first heat exchange part in the vertical direction into the second core part of the first heat exchange part.
  • the refrigerant flowing into the second core part of the second heat exchange part flows from the tank below the second heat exchange part in the vertical direction through the switch tank and the tank below the first heat exchange part in the vertical direction into the first core part of the first heat exchange part.
  • the refrigerant flowing into the first core part of the first heat exchange part, and the refrigerant flowing into the second core part of the first heat exchange part are discharged through the tank above the first heat exchange part in the vertical direction.
  • a refrigerant evaporator in which heat is exchanged between a fluid to be cooled and a refrigerant includes: a first heat exchange part in which the refrigerant flows to exchange heat between the fluid to be cooled and the refrigerant; a second heat exchange part in which the refrigerant flows to exchange heat between the fluid to be cooled and the refrigerant, the second heat exchange part being arranged to oppose the first heat exchange part; a first tank arranged below the first heat exchange part to distribute the refrigerant to the first heat exchange part; a second tank arranged below the second heat exchange part to collect the refrigerant flowing through the second heat exchange part; and a third tank joined to the first tank and the second tank to introduce the refrigerant collected by the second tank to the first tank.
  • a clearance is defined among the first tank, the second tank, and the third tank. At least one of a joint portion between the first tank and the third tank, and a joint portion between the second tank and the third tank defines
  • a refrigerant evaporator in which heat is exchanged between a fluid to be cooled and a refrigerant includes: a first heat exchange part in which the refrigerant flows to perform heat exchange between the fluid to be cooled and the refrigerant; a second heat exchange part in which the refrigerant flows to perform heat exchange between the fluid to be cooled and the refrigerant, the second heat exchange part being arranged to oppose the first heat exchange part; a first tank arranged below the first heat exchange part to distribute the refrigerant to the first heat exchange part; a second tank arranged below the second heat exchange part to collect the refrigerant flowing through the second heat exchange part; a connection part that connects the first tank and the second tank to each other; and a third tank joined to the first tank and the second tank to introduce the refrigerant collected by the second tank to the first tank.
  • At least one opening is defined in the connection part. At least one of a joint portion between the first tank and the third tank and a joint portion between the second tank and the third tank defines a drainage passage located on a lower side of the opening of the connection part to discharge water passing through the opening.
  • FIG. 1 is a perspective view illustrating a refrigerant evaporator according to a first embodiment.
  • FIG. 2 is an exploded perspective view illustrating the refrigerant evaporator of the first embodiment.
  • FIG. 3 is an exploded perspective view illustrating a windward distribution tank, a leeward collection tank, and a switch tank of the refrigerant evaporator of the first embodiment.
  • FIG. 4 is a schematic perspective view illustrating a flow of refrigerant in the refrigerant evaporator of the first embodiment.
  • FIG. 5 is a side view illustrating a structure of a drainage passage of the refrigerant evaporator of the first embodiment.
  • FIG. 6 is a side view illustrating a structure of a drainage passage of a refrigerant evaporator according to a first modification of the first embodiment.
  • FIG. 7 is a side view illustrating a structure of a drainage passage of a refrigerant evaporator according to a second modification of the first embodiment.
  • FIG. 8 is a side view illustrating a structure of a drainage passage of a refrigerant evaporator according to a third modification of the first embodiment.
  • FIG. 9 is a side view illustrating a structure of a drainage passage of a refrigerant evaporator according to a fourth modification of the first embodiment.
  • FIG. 10 is a side view illustrating a structure of a drainage passage of a refrigerant evaporator according to a fifth modification of the first embodiment.
  • FIG. 11 is a sectional view illustrating a windward distribution tank, a leeward collection tank, and a switch tank of a refrigerant evaporator according to a second embodiment.
  • the refrigerant evaporator 1 of this embodiment shown in FIG. 1 is used for a refrigeration cycle for an air-conditioner for a vehicle, which conditions air in the cabin.
  • the refrigerant evaporator 1 is a cooling heat exchanger for cooling air by absorbing heat from air to be sent to the cabin to evaporate the liquid phase refrigerant.
  • the refrigeration cycle includes a compressor, a radiator, an expansion valve, which are not illustrated but well known, in addition to the refrigerant evaporator 1 .
  • the refrigerant evaporator 1 includes two evaporation parts 10 and 20 and a switch tank 30 .
  • the evaporation part 10 is arranged on the upstream side and the evaporation part 20 is arranged on the downstream side in an air flowing direction X.
  • the air flowing direction X is a direction perpendicular to a vertical direction Y 1 , Y 2 .
  • the evaporation part 10 arranged upstream in the air flowing direction X is called as “the windward side evaporation part 10 .”
  • the evaporation part 20 arranged downstream in the air flowing direction X is called as “the leeward side evaporation part 20 .”
  • the windward side evaporation part 10 has a windward side collection tank 11 , a windward side heat exchange part 12 , and a windward side distribution tank 13 .
  • the windward side collection tank 11 , the windward side heat exchange part 12 , and the windward side distribution tank 13 are arranged in this order downward in the vertical direction Y 1 .
  • the windward side heat exchange part 12 has a rectangular parallelepiped shape.
  • the windward side heat exchange part 12 is arranged so that the air flowing direction X corresponds to the thickness direction.
  • the windward side distribution tank 13 is attached to a lower-side end surface 12 d of the windward side heat exchange part 12 in the vertical direction Y 1 .
  • the windward side collection tank 11 is attached to an upper-side end surface 12 e of the windward side heat exchange part 12 in the vertical direction Y 2 .
  • the windward side heat exchange part 12 includes plural tubes 12 a and plural fins 12 b alternately stacked with each other in the horizontal direction. In FIG. 2 , illustration of the tube 12 a and the fin 12 b is omitted.
  • the tube 12 a is arranged to extend in the vertical direction Y 1 , Y 2 , and has a flat shape in the cross-section.
  • a passage for flowing refrigerant is formed in the tube 12 a .
  • the fin 12 b is what is called a corrugated fin formed by bending a thin metal plate.
  • the fin 12 b is arranged between the tubes 12 a adjacent to each other in the horizontal direction, and is joined to the external surface of the tube 12 a .
  • the windward side heat exchange part 12 is divided into a first windward side core part 121 and a second windward side core part 122 in the stacking direction of the tube 12 a and the fin 12 b .
  • FIG. 2 the windward side heat exchange part 12 is divided into a first windward side core part 121 and a second windward side core part 122 in the stacking direction of the tube 12 a and the fin 12 b .
  • the windward side heat exchange part 12 has a side plate 12 c on the both ends in the stacking direction of the tube 12 a and the fin 12 b .
  • the side plate 12 c is a component for reinforcing the windward side heat exchange part 12 .
  • the windward side distribution tank 13 is a cylindrical component in which a passage for refrigerant is defined. The both ends of the windward side distribution tank 13 in the axial direction are closed. As shown in FIG. 2 , the windward side distribution tank 13 has a partition board 13 a at the central part in the axial direction. The partition board 13 a divides the internal passage of the windward side distribution tank 13 into a first distribution part 131 and a second distribution part 132 . Plural through holes, which are not illustrated, are defined in the external surface of the windward side distribution tank 13 , and the lower end of the tube 12 a in the vertical direction Y 1 is inserted into the through hole.
  • the internal passage of the first distribution part 131 is communicated to the tube 12 a of the first windward side core part 121 by the through hole, and the internal passage of the second distribution part 132 is communicated to the tube 12 a of the second windward side core part 122 by the through hole. That is, the first distribution part 131 distributes refrigerant to the tubes 12 a of the first windward side core part 121 . Moreover, the second distribution part 132 distributes refrigerant to the tubes 12 a of the second windward side core part 122 .
  • a joint portion 133 having a plane shape is formed on the external surface of the windward side distribution tank 13 to extend in the axial direction.
  • the joint portion 133 is a portion to which the switch tank 30 is joined.
  • the joint portion 133 has a through hole 134 passing through to the internal passage of the first distribution part 131 .
  • the through hole 134 is a passage for leading the refrigerant from the switch tank 30 to the first distribution part 131 .
  • the joint portion 133 has a through hole 135 passing through to the internal passage of the second distribution part 132 .
  • the through hole 135 is a passage for leading the refrigerant from the switch tank 30 to the second distribution part 132 .
  • the windward side collection tank 11 is a cylindrical component in which a passage is defined for refrigerant.
  • One end part of the windward side collection tank 11 in the axial direction is closed.
  • the other end part of the windward side collection tank 11 in the axial direction defines a refrigerant outlet 11 a .
  • the refrigerant outlet 11 a is connected to the intake side of the non-illustrated compressor.
  • non-illustrated plural through holes are formed in the external surface of the windward side collection tank 11 , and the upper end of the tube 12 a in the vertical direction Y 2 is inserted into the through hole.
  • the internal passage of the windward side collection tank 11 is communicated to the tube 12 a of the first windward side core part 121 and the tube 12 a of the second windward side core part 122 by the respective through holes. That is, the refrigerant which flows through the tube 12 a of the first windward side core part 121 , and the refrigerant which flows through the tube 12 a of the second windward side core part 122 are brought together into the windward side collection tank 11 .
  • the refrigerant collected in the windward side collection tank 11 is introduced into the compressor through the refrigerant outlet 11 a.
  • the leeward side evaporation part 20 has a leeward side distribution tank 21 , a leeward side heat exchange part 22 , and a leeward side collection tank 23 .
  • the leeward side distribution tank 21 , the leeward side heat exchange part 22 , and the leeward side collection tank 23 are arranged in this order downward in the vertical direction Y 1 .
  • the leeward side heat exchange part 22 has the structure approximately the same as the windward side heat exchange part 12 . That is, the leeward side heat exchange part 22 has a rectangular parallelepiped shape, and is arranged so that the air flowing direction X corresponds to the thickness direction.
  • the leeward side heat exchange part 22 includes plural tubes 22 a and plural fins 22 b alternately stacked with each other in the horizontal direction, and has a side plate 22 c on the both ends in the stacking direction of the tube 22 a and the fin 22 b .
  • the leeward side collection tank 23 is attached to a lower end surface 22 d of the leeward side heat exchange part 22 in the vertical direction Y 1 .
  • the leeward side distribution tank 21 is attached to an upper end surface 22 e of the leeward side heat exchange part 22 in the vertical direction Y 2 . Moreover, as shown in FIG. 2 , the leeward side heat exchange part 22 is divided into a first leeward side core part 221 opposing the first windward side core part 121 and a second leeward side core part 222 opposing the second windward side core part 122 in the air flowing direction X.
  • the leeward side distribution tank 21 is a cylindrical component which has a passage for refrigerant inside. One end part of the leeward side distribution tank 21 in the axial direction is closed. The other end part of the leeward side distribution tank 21 in the axial direction defines a refrigerant inlet 21 a . Low-pressure refrigerant decompressed by the non-illustrated expansion valve flows into the refrigerant inlet 21 a . Moreover, non-illustrated plural through holes are formed in the external surface of the leeward side distribution tank 21 , and the upper end of the tube 22 a in the vertical direction Y 2 is inserted into the through hole.
  • the internal passage of the leeward side distribution tank 21 is communicated to the tube 22 a of the first leeward side core part 221 and the tube 22 a of the second leeward side core part 222 by the through hole. That is, the refrigerant which flowed into the leeward side distribution tank 21 from the refrigerant inlet 21 a is distributed to the tube 22 a of the first leeward side core part 221 and the tube 22 a of the second leeward side core part 222 .
  • the leeward side collection tank 23 is a cylindrical component which has a passage for refrigerant inside. The both ends of the leeward side collection tank 23 in the axial direction are closed.
  • the leeward side collection tank 23 has a partition board 23 a at the central part in the axial direction. As shown in FIG. 2 , the partition board 23 a divides the internal passage of the leeward side collection tank 23 into a first collection part 231 and a second collection part 232 .
  • non-illustrated plural through holes are formed in the external surface of the leeward side collection tank 23 , and the lower end of the tube 22 a in the vertical direction Y 1 is inserted into the through hole.
  • the internal passage of the first collection part 231 is communicated to the tube 22 a of the first leeward side core part 221
  • the internal passage of the second collection part 232 is communicated to the tube 22 a of the second leeward side core part 222 . That is, the refrigerant which flows through the tubes 22 a of the first leeward side core part 221 is brought together in the first collection part 231 .
  • the refrigerant which flows through the tubes 22 a of the second leeward side core part 222 is brought together in the second collection part 232 .
  • the external surface of the leeward side collection tank 23 defines a joint portion 233 having a plane shape to extend in the axial direction.
  • the joint portion 233 is a portion to which the switch tank 30 is joined.
  • the joint portion 233 has a through hole 234 passing through to the internal passage of the first collection part 231 .
  • the through hole 234 is a passage for introducing the refrigerant from the first collection part 231 to the switch tank 30 .
  • the joint portion 233 has a through hole 235 passing through to the internal passage of the second collection part 232 .
  • the through hole 235 is a passage for introducing the refrigerant from the second collection part 232 to the switch tank 30 .
  • the leeward side collection tank 23 corresponds to a first tank
  • the windward side heat exchange part 12 corresponds to a second tank.
  • the leeward side heat exchange part 22 corresponds to a first heat exchange part
  • the windward side heat exchange part 12 corresponds to a second heat exchange part.
  • the switch tank 30 is arranged between the windward side distribution tank 13 and the leeward side collection tank 23 .
  • the switch tank 30 corresponds to a third tank.
  • the switch tank 30 is a cylindrical component which has a passage for refrigerant inside.
  • a partition component 301 is disposed inside the switch tank 30 .
  • the partition component 301 divides the interior space of the switch tank 30 to a first refrigerant passage 302 and a second refrigerant passage 303 .
  • the external surface of the switch tank 30 defines a joint portion 304 having a plane shape to which the joint portion 133 of the windward side distribution tank 13 is joined, and a joint portion 305 having a plane shape to which the joint portion 233 of the leeward side collection tank 23 is joined.
  • a through hole 306 passing through to the first refrigerant passage 302 is formed in the joint portion 304 .
  • the through hole 306 is located to be connected with the through hole 134 of the windward side distribution tank 13 .
  • a through hole 307 passing through to the first refrigerant passage 302 is formed in the joint portion 305 .
  • the through hole 307 is located to be connected with the through hole 235 of the leeward side collection tank 23 . That is, the refrigerant brought together in the second collection part 232 of the leeward side collection tank 23 flows into the first refrigerant passage 302 through the through hole 235 of the leeward side collection tank 23 and the through hole 307 of the switch tank 30 .
  • the refrigerant which flowed into the first refrigerant passage 302 is led to the first distribution part 131 of the windward side distribution tank 13 through the through hole 306 of the switch tank 30 and the through hole 134 of the windward side distribution tank 13 .
  • a through hole 308 passing through to the second refrigerant passage 303 is formed in the joint portion 304 .
  • the through hole 308 is located to be connected with the through hole 135 of the windward side distribution tank 13 .
  • a through hole 309 passing through to the second refrigerant passage 303 is formed in the joint portion 305 .
  • the through hole 309 is located to be connected with the through hole 234 of the leeward side collection tank 23 . That is, the refrigerant brought together in the first collection part 231 of the leeward side collection tank 23 flows into the second refrigerant passage 303 through the through hole 234 of the leeward side collection tank 23 and the through hole 309 of the switch tank 30 .
  • the refrigerant which flowed into the second refrigerant passage 303 is led to the second distribution part 132 of the windward side distribution tank 13 through the through hole 308 of the switch tank 30 and the through hole 135 of the windward side distribution tank 13 .
  • the switch tank 30 functions as a portion which introduces the refrigerant collected in the leeward side collection tank 23 to the windward side distribution tank 13 . Moreover, the switch tank 30 functions as a portion which exchanges the flows of refrigerant in the leeward side heat exchange part 22 and the flows of refrigerant in the windward side heat exchange part 12 with each other in the stacking direction of the tubes 12 a , 22 a.
  • the refrigerant decompressed by the non-illustrated expansion valve is introduced into the leeward side distribution tank 21 from the refrigerant inlet 21 a , as shown in an arrow A in FIG. 4 .
  • the refrigerant is distributed in the leeward side distribution tank 21 , as shown by arrows B and C, to flow into the first leeward side core part 221 and the second leeward side core part 222 of the leeward side distribution tank 21 .
  • the refrigerant which flowed into the first leeward side core part 221 and the second leeward side core part 222 flows through inside of each tube 22 a downward in the vertical direction Y 1 .
  • the refrigerant which flows through the inside of the tube 22 a performs heat exchange with air flowing outside of the tube 22 a in the air flowing direction X. Thereby, a part of the refrigerant is evaporated to absorb heat from air, such that the air is cooled.
  • the refrigerant which flows through the tubes 22 a of the first leeward side core part 221 is brought together in the first collection part 231 of the leeward side collection tank 23 , as shown in an arrow D.
  • the refrigerant brought together in the first collection part 231 flows into the second distribution part 132 of the windward side distribution tank 13 through the second refrigerant passage 303 of the switch tank 30 , as shown in an arrow F.
  • the refrigerant which flowed into the second distribution part 132 flows into the second windward side core part 122 , as shown in an arrow H.
  • the refrigerant which flows through the tubes 22 a of the second leeward side core part 222 is brought together in the second collection part 232 of the leeward side collection tank 23 , as shown in an arrow E.
  • the refrigerant brought together in the second collection part 232 flows into the first distribution part 131 of the windward side distribution tank 13 through the first refrigerant passage 302 of the switch tank 30 , as shown in an arrow G.
  • the refrigerant which flowed into the first distribution part 131 flows into the first windward side core part 121 , as shown in an arrow I.
  • the refrigerant which flows through the inside of the tube 22 a performs heat exchange with air which flows outside of the tube 22 a in the air flowing direction X. Thereby, a part of the refrigerant is evaporated to absorb heat from air, such that the air is cooled.
  • the refrigerant which flows through the first windward side core part 121 and the second windward side core part 122 is brought together in the windward side collection tank 11 , as shown in arrows K and J.
  • the refrigerant brought together in the windward side collection tank 11 is supplied to the intake side of the non-illustrated compressor from the refrigerant outlet 11 a of the windward side collection tank 11 , as shown in an arrow L.
  • the condensed water flows downward in the vertical direction Y 1 .
  • the condensed water may stay in a clearance CL 1 among the windward side distribution tank 13 , the leeward side collection tank 23 , and the switch tank 30 . If the condensed water staying in the clearance CL 1 is frozen by a temperature fall, each of the tanks 13 , 23 , and 30 may be damaged, because the volume of water is increased, as what is called a freeze crack.
  • the refrigerant evaporator 1 has a drainage structure for discharging the condensed water staying in the clearance CL 1 . Next, the details of the drainage structure are explained.
  • plural drain grooves 310 are formed in the joint portion 304 of the switch tank 30 along the slope surface of the joint portion 304 .
  • a drain groove 136 is formed in the joint portion 133 of the windward side distribution tank 13 at the position corresponding to the drain groove 310 of the joint portion 304 of the switch tank 30 .
  • a straight-shaped drainage passage 40 is defined by a space surrounded by the drain groove 310 formed in the joint portion 304 of the switch tank 30 and the drain groove 136 formed in the joint portion 133 of the windward side distribution tank 13 .
  • One end part of the drainage passage 40 defines an inflow port 41 communicated to the clearance CL 1 .
  • the other end part of the drainage passage 40 defines an outlet port 42 open to the lower space of the windward side distribution tank 13 in the vertical direction Y 1 .
  • the outlet port 42 is located on the lower side of the clearance CL 1 in the vertical direction Y 1 .
  • plural drain grooves 311 are formed in the joint portion 305 of the switch tank 30 along the slope surface of the joint portion 305 .
  • a drain groove 236 is formed in the joint portion 233 of the leeward side collection tank 23 at the position corresponding to the drain groove 311 of the joint portion 305 of the switch tank 30 .
  • a straight-shaped drainage passage 50 is defined by a space surrounded by the drain groove 311 formed in the joint portion 305 of the switch tank 30 and the drain groove 236 formed in the joint portion 233 of the leeward side collection tank 23 .
  • One end part of the drainage passage 50 defines an inflow port 51 communicated to the clearance CL 1 .
  • the other end part of the drainage passage 50 defines an outlet port 52 open to the lower space of the leeward side collection tank 23 in the vertical direction Y 1 .
  • the outlet port 52 is located on the lower side of the clearance CL 1 in the vertical direction Y 1 .
  • each illustration of the drain groove 310 , 311 of the switch tank 30 , the drain groove 136 of the windward side distribution tank 13 , and the drain groove 236 of the leeward side collection tank 23 is omitted.
  • the condensed water can be discharged from the clearance CL 1 outside through the drainage passage 40 or/and the drainage passage 50 . Therefore, a freeze crack resulting from the freeze of condensed water can be restricted since it is difficult for the condensed water to stay in the clearance CL 1 .
  • the cross-section area of the outlet port 42 of the drainage passage 40 is larger than the cross-section area of the inflow port 41 of the drainage passage 40 .
  • the cross-section area of the outlet port 52 of the drainage passage 50 is larger than the cross-section area of the inflow port 51 of the drainage passage 50 . Since the condensed water trapped by the clearance CL 1 becomes easier to be discharged according to such a structure, a freeze crack can be controlled effectively.
  • the same action and effect can be acquired when the cross-section area of the outlet port 42 is more than or equal to the cross-section area of the inflow port 41 .
  • the same action and effect can be acquired when the cross-section area of the outlet port 52 is more than or equal to the cross-section area of the inflow port 51 .
  • the drainage passage 40 , 50 may be defined of only the drain groove 310 , 311 formed in the switch tank 30 .
  • the drainage passage 40 may be defined of only the drain groove 136 formed in the windward side distribution tank 13 .
  • the drainage passage 50 may be defined of only the drain groove 236 formed in the leeward side collection tank 23 .
  • the drainage passage for discharging the water trapped by the clearance CL 1 is defined by at least one of the joint portion 133 , 304 between the windward side distribution tank 13 and the switch tank 30 , and the joint portion 233 , 305 between the leeward side collection tank 23 and the switch tank 30 shown in FIG. 2 .
  • the drainage passage 40 , 50 may have a curved shape.
  • the form of the drainage passage 40 , 50 can be suitably changed, without being limited to the form shown in FIG. 5 to FIG. 9 .
  • the cross-section area of the narrowest clearance between the windward side distribution tank 13 and the windward side collection tank 23 is set as “Sa.”
  • the cross-section area of the inflow port 41 of the drainage passage 40 is set as “Sb 1 ”
  • the cross-section area of the outlet port 42 of the drainage passage 40 is set as “Sc 1 .”
  • the cross-section area of the inflow port 51 of the drainage passage 50 is set as “Sb 2 ”
  • the cross-section area of the outlet port 52 of the drainage passage 50 is set as “Sc 2 .”
  • cross-section areas Sa, Sb 1 , Sb 2 , Sc 1 , and Sc 2 are set to satisfy the following relation formulas f1 and f2.
  • the refrigerant evaporator 1 is arranged with the slanting posture, if the drainage passage, among the drainage passage 40 and the drainage passage 50 , arranged on the lower side in the vertical direction satisfies the formulas, the same operation and advantage can be acquired.
  • the slanting posture represents an orientation in which the longitudinal direction of the tubes 12 a and 22 a intersects the vertical direction.
  • the windward side distribution tank 13 and the leeward side collection tank 23 of this embodiment are formed integrally with each other.
  • the windward side distribution tank 13 and the leeward side collection tank 23 are configured to have a core plate 61 and a tank portion 62 .
  • the tube 12 a of the windward side heat exchange part 12 and the tube 22 a of the leeward side heat exchange part 22 are inserted and joined to the core plate 61 .
  • the core plate 61 is formed to have approximately W-shaped cross-section.
  • the core plate 61 has a windward side tube bonded surface 611 and a leeward side tube bonded surface 612 .
  • the tube 12 a of the windward side heat exchange part 12 is inserted and joined to the windward side tube bonded surface 611 .
  • the tube 22 a of the leeward side heat exchange part 22 is inserted and joined to the leeward side tube bonded surface 612 .
  • the core plate 61 has a core plate side projection part 613 arranged between the two tube bonded surfaces 611 , 612 .
  • the core plate side projection part 613 is projected away from the heat exchange part 12 , 22 relative to the two tube bonded surfaces 611 , 612 .
  • the core plate side projection part 613 has plural openings 613 a arranged in the longitudinal direction, that is a direction perpendicular to both of the air flowing direction X and the vertical direction Y 1 , Y 2 .
  • the tank portion 62 defines a tank space with the core plate 61 .
  • the tank space represents the first distribution part 131 and the second distribution part 132 of the windward side distribution tank 31 , and the first collection part 231 and the second collection part 232 of the leeward side collection tank 23 , shown in FIG. 2 .
  • the tank portion 62 is formed to have approximately W-shaped cross-section.
  • the tank portion 62 has a windward side tank the portion 621 and a leeward side tank portion 622 .
  • the windward side tank portion 621 defines the first distribution part 131 and the second distribution part 132 with the windward side tube bonded surface 611 .
  • the leeward side tank portion 622 defines the first collection part 231 and the second collection part 232 with the leeward side tube bonded surface 612 .
  • the tank portion 62 has a tank portion side projection part 623 arranged between the two tank portions 621 and 622 .
  • the tank portion side projection part 623 is projected toward the windward side heat exchange part 12 and the leeward side heat exchange part 22 relative to the two tank portions 621 , 622 .
  • the tank portion side projection part 623 has plural openings 623 a arranged in the longitudinal direction, that is, a direction perpendicular to both of the air flowing direction X and the vertical direction Y 1 , Y 2 .
  • the core plate side projection part 613 of the core plate 61 and the tank portion side projection part 623 of the tank portion 62 are joined to each other.
  • the space formed of the core plate 61 and the tank portion 62 is divided into the windward side distribution tank 13 and the leeward side collection tank 23 .
  • the core plate side projection part 613 and the tank portion side projection part 623 operate as a connection part 70 which connects the windward side distribution tank 13 and the leeward side collection tank 23 to each other.
  • the opening 613 a and the opening 623 a are arranged at least partially overlap with each other. Thereby, the opening 613 a and the opening 623 a function as a drainage hole to drain water condensed, due to heat exchange between refrigerant and air, on the external surfaces of the windward side heat exchange part 12 and the leeward side heat exchange part 22 .
  • a space CL 2 is defined between the upper part of the switch tank 30 and the tank portion 62 .
  • the space CL 2 is communicated to a space where the windward side heat exchange part 12 and the leeward side heat exchange part 22 are arranged through the opening 613 a and the opening 623 a .
  • the space CL 2 is located below the opening 613 a and the opening 623 a in the vertical direction Y 1 .
  • the external surface of the tank portion 62 located on the outer side when attached to the core plate 61 has the joint portion 621 a and the joint portion 622 a .
  • the joint portion 621 a is a portion joined to the joint portion 304 of the switch tank 30 .
  • the joint portion 622 a is a portion joined to the joint portion 305 of the switch tank 30 .
  • the drain groove 621 b is formed on the joint portion 621 a at the position corresponding to the drain groove 310 of the joint portion 304 of the switch tank 30 .
  • the straight-shaped drainage passage 40 is defined by the space surrounded by the drain groove 310 formed in the joint portion 304 of the switch tank 30 , and the drain groove 621 b .
  • the drainage passage 40 is formed on the lower side of the opening 613 a , 623 a of the connection part 70 .
  • the inflow port 41 communicated to the space CL 2 is formed at the end part of the drainage passage 40 .
  • the outlet port 42 open to the lower space of the windward side distribution tank 13 in the vertical direction Y 1 is formed at the other end part of the drainage passage 40 .
  • the outlet port 42 is arranged on the lower side of the space CL 2 in the vertical direction Y 1 .
  • the space where the windward side heat exchange part 12 and the leeward side heat exchange part 22 are arranged is communicated to the drainage passage 40 through the opening 613 a , the opening 623 a , and the space CL 2 .
  • the drain groove 622 b is formed in the joint portion 622 a at the position corresponding to the drain groove 311 of the joint portion 305 of the switch tank 30 .
  • the straight-shaped drainage passage 50 is defined by the space surrounded by the drain groove 311 formed in the joint portion 305 of the switch tank 30 , and the drain groove 622 b .
  • the drainage passage 50 is formed on the lower side of the opening 613 a , 623 a of the connection part 70 .
  • the inflow port 51 communicated to the space CL 2 is formed at the end part of the drainage passage 50 .
  • the outlet port 52 open to the lower space of the leeward side collection tank 23 in the vertical direction Y 1 is formed at the other end part of the drainage passage 50 .
  • the outlet port 52 is arranged on the lower side of the space CL 2 in the vertical direction Y 1 .
  • the space where the windward side heat exchange part 12 and the leeward side heat exchange part 22 are arranged is communicated to the drainage passage 50 through the opening 613 a , the opening 623 a , and the space CL 2 .
  • a cross-section area of at least one of the inflow port 41 of the drainage passage 40 and the inflow port 51 of the drainage passage 50 is larger than each opening area of the opening 613 a and the opening 623 a .
  • the condensed water which flows into the space CL 2 from the opening 613 a and the opening 623 a can be easily drained.
  • the joint portion 621 a has a through hole used as a passage for introducing the refrigerant from the switch tank 30 to the first distribution part 131 , and a through hole used as a passage for introducing the refrigerant from the switch tank 30 to the second distribution part 132 .
  • the joint portion 622 a has a through hole used as a passage for introducing the refrigerant from the first collection part 231 to the switch tank 30 , and a through hole used as a passage for introducing the refrigerant from the second collection part 232 to the switch tank 30 .
  • a cross-section area of at least one of the inflow port 41 of the drainage passage 40 and the inflow port 51 of the drainage passage 50 is larger than each opening area of the opening 613 a and the opening 623 a .
  • the refrigerant evaporator 1 of each embodiment may have only either one of the drainage passage 40 and the drainage passage 50 .
  • the fluid to be cooled in the refrigerant evaporator 1 is not limited to air, and appropriate fluid can be used.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
US15/536,597 2015-02-27 2016-02-25 Refrigerant evaporator Abandoned US20170328615A1 (en)

Applications Claiming Priority (3)

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JP2015-038169 2015-02-27
JP2015038169 2015-02-27
PCT/JP2016/001023 WO2016136266A1 (ja) 2015-02-27 2016-02-25 冷媒蒸発器

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JP (1) JP6558268B2 (enExample)
CN (1) CN107208943B (enExample)
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WO (1) WO2016136266A1 (enExample)

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US10352601B2 (en) 2015-02-27 2019-07-16 Denso Corporation Refrigerant evaporator
US11035620B1 (en) * 2020-11-19 2021-06-15 Richard W. Trent Loop heat pipe transfer system with manifold

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JP6558268B2 (ja) * 2015-02-27 2019-08-14 株式会社デンソー 冷媒蒸発器
WO2024224637A1 (ja) * 2023-04-28 2024-10-31 三菱電機株式会社 熱交換器及び冷凍サイクル装置

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DE112016000954T5 (de) 2017-11-09
JP6558268B2 (ja) 2019-08-14
WO2016136266A1 (ja) 2016-09-01
CN107208943B (zh) 2020-08-14
JP2016164486A (ja) 2016-09-08
CN107208943A (zh) 2017-09-26

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