US20230375283A1 - Heat exchanger and refrigeration cycle apparatus - Google Patents

Heat exchanger and refrigeration cycle apparatus Download PDF

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Publication number
US20230375283A1
US20230375283A1 US18/027,236 US202018027236A US2023375283A1 US 20230375283 A1 US20230375283 A1 US 20230375283A1 US 202018027236 A US202018027236 A US 202018027236A US 2023375283 A1 US2023375283 A1 US 2023375283A1
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United States
Prior art keywords
flat tubes
plate
heat exchanger
gravity
fins
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Pending
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US18/027,236
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English (en)
Inventor
Tsuyoshi Maeda
Atsushi Takahashi
Satoru Yanachi
Kodai Miyakawa
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TAKAHASHI, ATSUSHI, MAEDA, TSUYOSHI, MIYAKAWA, Kodai, YANACHI, SATORU
Publication of US20230375283A1 publication Critical patent/US20230375283A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • 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
    • F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05341—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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • 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
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/0292—Other particular headers or end plates with fins
    • 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
    • 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
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0278—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of stacked distribution plates or perforated plates arranged over end plates

Definitions

  • the present disclosure relates to a heat exchanger and a refrigeration cycle apparatus.
  • Japanese Patent Laying-Open No. 2015-113983 discloses a heat exchanger including: a first heat exchange element having a plurality of first flat tubes; a second heat exchange element having a plurality of second flat tubes; and a folded header at which refrigerant having passed through the first heat exchange element is turned and introduced into the second heat exchange element.
  • each of the first flat tubes and each of the second flat tubes are disposed at the same height in the vertical direction, one of each first flat tube and each second flat tube is located downstream of the other in the ventilation direction.
  • the flat tubes disposed on the downstream side are located in the dead water zone formed behind the flat tubes disposed on the upstream side.
  • a main object of the present disclosure is to provide a heat exchanger enhanced in heat exchange performance as compared with the above-mentioned conventional heat exchanger, and a refrigeration cycle apparatus including the heat exchanger.
  • a heat exchanger includes: a first heat exchange portion and a second heat exchange portion arranged side by side in a first direction intersecting with a direction of gravity.
  • the first heat exchange portion has: a plurality of first fins extending in the direction of gravity and arranged side by side in a second direction intersecting with the direction of gravity and the first direction; and a plurality of first flat tubes mounted to intersect with each of the first fins and arranged side by side in the direction of gravity.
  • the second heat exchange portion has: a plurality of second fins extending in the direction of gravity and arranged side by side in the second direction; and a plurality of second flat tubes mounted to intersect with each of the second fins and arranged side by side in the direction of gravity.
  • the heat exchanger further includes: a first header connected to a first end of each of the first flat tubes; a second header connected to a first end of each of the second flat tubes; and a third header connected to a second end of each of the first flat tubes and a second end of each of the second flat tubes.
  • each of the second flat tubes is disposed not to overlap with each of the first flat tubes.
  • the third header has: a first plate provided with a plurality of first insertion holes through which the second ends of the first flat tubes are respectively inserted, and a plurality of second insertion holes through which the second ends of the second flat tubes are respectively inserted; and a second plate provided with a plurality of communication spaces each communicating with a corresponding one of the first insertion holes and a corresponding one of the second insertion holes.
  • a heat exchanger includes a first heat exchange portion and a second heat exchange portion arranged side by side in a first direction intersecting with a direction of gravity.
  • the first heat exchange portion has: a plurality of first fins extending in the direction of gravity and arranged side by side in a second direction intersecting with the direction of gravity and the first direction; and a plurality of first flat tubes mounted to intersect with each of the first fins and arranged side by side in the direction of gravity.
  • the second heat exchange portion has: a plurality of second fins extending in the direction of gravity and arranged side by side in the second direction; and a plurality of second flat tubes mounted to intersect with each of the second fins and arranged side by side in the direction of gravity.
  • the heat exchanger further includes: a first header connected to a first end of each of the first flat tubes; a second header connected to a first end of each of the second flat tubes; and a third header connected to a second end of each of the first flat tubes and a second end of each of the second flat tubes, the third header being provided with a plurality of communication spaces each communicating with a corresponding one of the first flat tubes and a corresponding one of the second flat tubes.
  • each of the second flat tubes is disposed not to overlap with each of the first flat tubes. At least one of the first flat tubes that is connected to one communication space of the communication spaces is located lower in the direction of gravity than at least one of the second flat tubes that is connected to the one communication space.
  • the present disclosure can provide a heat exchanger improved in heat exchange performance as compared with the above-mentioned conventional heat exchanger, and a refrigeration cycle apparatus including the heat exchanger.
  • FIG. 1 is a top view of a heat exchanger according to a first embodiment.
  • FIG. 2 is a front view of the heat exchanger shown in FIG. 1 .
  • FIG. 3 is a side view of the heat exchanger shown in FIG. 1 .
  • FIG. 4 is a partial cross-sectional view for illustrating configurations of a first fin, a first flat tube, a second fin, and a second flat tube in the heat exchanger shown in FIG. 1 .
  • FIG. 5 is a diagram for illustrating a first plate of a bridging header shown in FIG. 1 .
  • FIG. 6 is a diagram for illustrating a second plate of the bridging header shown in FIG. 1 .
  • FIG. 7 is a diagram for illustrating a third plate of the bridging header shown in FIG. 1 .
  • FIG. 8 is an exploded perspective view for illustrating a connection relation among the first plate, the second plate, and the third plate of the bridging header shown in FIG. 1 .
  • FIG. 9 is a partial cross-sectional view taken along a line indicated by an arrow IX-IX in FIG. 1 .
  • FIG. 10 is a partial cross-sectional view showing a modification of the first plate, the second plate, and the third plate shown in FIG. 9 .
  • FIG. 11 is a partial cross-sectional view for illustrating configurations of a first fin, a first flat tube, a second fin, and a second flat tube in a heat exchanger according to a second embodiment.
  • FIG. 12 is a diagram for illustrating a first plate of a bridging header in the heat exchanger according to the second embodiment.
  • FIG. 13 is a diagram for illustrating a second plate of the heat exchanger according to the second embodiment.
  • FIG. 14 is a top view of a heat exchanger according to a third embodiment.
  • FIG. 15 is a front view of the heat exchanger shown in FIG. 14 .
  • FIG. 16 is a side view of the heat exchanger shown in FIG. 14 .
  • FIG. 17 is a diagram for illustrating a first plate of a bridging header shown in FIG. 14 .
  • FIG. 18 is a diagram for illustrating a second plate of the bridging header shown in FIG. 14 .
  • FIG. 19 is a diagram for illustrating a third plate of the bridging header shown in FIG. 14 .
  • a heat exchanger 100 includes a first heat exchange portion 11 , a second heat exchange portion 12 , a first header 13 , a second header 14 , and a third header (hereinafter, referred to as a bridging header) 15 .
  • each of first heat exchange portion 11 and second heat exchange portion 12 is provided so as to exchange heat between the refrigerant flowing in the X direction (the second direction) and air flowing in the Y direction.
  • First heat exchange portion 11 and second heat exchange portion 12 are arranged side by side in the Y direction (the first direction).
  • the upstream side in the ventilation direction will be simply referred to as a windward side while the downstream side in the ventilation direction will be simply referred to as a leeward side.
  • First heat exchanging portion 11 is disposed on the windward side relative to second heat exchanging portion 12 .
  • first heat exchange portion 11 includes a plurality of first fins 1 and a plurality of first flat tubes 2 .
  • the plurality of first fins 1 extend in the Z direction and the Y direction, and are arranged side by side in the X direction.
  • Each of first fins 1 is a plate fin.
  • the plurality of first flat tubes 2 are mounted to intersect with each of the plurality of first fins 1 , and are arranged side by side in the Z direction.
  • the cross-sectional shape of each first flat tube 2 perpendicular to the X direction is a flat shape having a long-side direction and a short-side direction.
  • the long-side direction of each first flat tube 2 corresponds to the Y direction.
  • first heat exchange portion 11 heat is exchanged between: air flowing in the Y direction between first fins 1 adjacent to each other; and the refrigerant flowing in the X direction through each first flat tube 2 .
  • a plurality of flow paths are formed inside each first flat tube 2 .
  • the flow paths each extend in the axial direction (the X direction) of each first flat tube 2 and are arranged side by side in the long-side direction of each first flat tube 2 .
  • second heat exchange portion 12 includes a plurality of second fins 3 and a plurality of second flat tubes 4 .
  • the plurality of second fins 3 extend in the Z direction and the Y direction, and are arranged side by side in the X direction.
  • Each second fin 3 is a plate fin.
  • the plurality of second flat tubes 4 are mounted to intersect with each of the plurality of second fins 3 and are arranged side by side in the Z direction.
  • the cross-sectional shape of each second flat tube 4 perpendicular to the X direction is a flat shape having a long-side direction and a short-side direction.
  • second heat exchange portion 12 heat is exchanged between: air flowing in the Y direction between second fins 3 adjacent to each other; and the refrigerant flowing in the X direction through each second flat tube 4 .
  • a plurality of flow paths are formed inside each second flat tube 4 .
  • the flow paths each extend in the axial direction (the X direction) of each second flat tube 4 and are arranged side by side in the long-side direction of each second flat tube 4 .
  • each second fin 3 is spaced apart in the Y direction from each first fin 1 .
  • Each second fin 3 is disposed on the leeward side relative to each first fin 1 .
  • An end portion 3 A located on the windward side of each second fin 3 is disposed on the leeward side relative to an end portion 1 B located on the leeward side of each first fin 1 .
  • each second flat tube 4 is spaced apart in the Y direction from each first flat tube 2 .
  • Each second flat tube 4 is disposed on the leeward side relative to each first flat tube 2 .
  • An end portion located on the windward side of each second flat tube 4 is disposed on the leeward side relative to an end portion located on the leeward side of each first flat tube 2 .
  • each second fin 3 is disposed to overlap with each first fin 1 when viewed in the Y direction.
  • Each second fin 3 is formed as a member separate from each first fin 1 .
  • each second flat tube 4 is disposed not to overlap with each first flat tube 2 when viewed in the Y direction.
  • each first flat tube 2 is disposed between two second flat tubes 4 adjacent to each other in the Z direction.
  • each second flat tube 4 is disposed between two first flat tubes 2 adjacent to each other in the Z direction.
  • each first fin 1 has a continuous portion 1 D disposed on one side (for example, on the windward side) in the Y direction and extending in the Z direction.
  • Each first fin 1 is provided with a plurality of insertion holes 1 C disposed on the other side (for example, on the leeward side) in the Y direction with respect to continuous portion 1 D.
  • each first flat tube 2 is inserted.
  • Continuous portion 1 D is located between an end portion 1 A located on the windward side of first fin 1 and an end portion located on the windward side of each insertion hole 1 C.
  • Each insertion hole 1 C is opened, for example, at end portion 1 B located on the leeward side of first fin 1 . Note that each insertion hole 1 C may not be opened at end portion 1 B located on the leeward side of first fin 1 .
  • each second fin 3 has a continuous portion 3 D disposed on one side (for example, on the windward side) in the Y direction and extending in the Z direction.
  • Each second fin 3 is provided with a plurality of insertion holes 3 C disposed on the other side (for example, on the leeward side) in the Y direction with respect to continuous portion 3 D.
  • each second flat tube 4 is inserted.
  • Continuous portion 3 D is located between end portion 3 A located on the windward side of second fin 3 and the end portion located on the windward side of each insertion hole 3 C.
  • Each insertion hole 3 C is opened, for example, at an end portion 3 B located on the leeward side of second fin 3 .
  • Each insertion hole 3 C may not be opened at end portion 3 B located on the leeward side of second fin 3 .
  • first header 13 is connected to a first end of each first flat tube 2 in the Y direction.
  • First header 13 allows merging of the refrigerant having flowed out of each first flat tube 2 or allows splitting of the refrigerant that is to flow into each first flat tube 2 .
  • Second header 14 is connected to the first end of each second flat tube 4 in the Y direction, and allows merging of the refrigerant having flowed out of each second flat tube 4 or allows splitting of the refrigerant that is to flow into each second flat tube 4 .
  • Second header 14 is disposed on the leeward side relative to first header 13 .
  • bridging header 15 is connected to the second end of each first flat tube 2 and the second end of each second flat tube 4 .
  • Bridging header 15 provides communication between each first flat tube 2 and each second flat tube 4 for refrigerant to flow therebetween.
  • bridging header 15 is provided with: a plurality of first insertion holes 16 through which first flat tubes 2 are respectively inserted; a plurality of second insertion holes 17 through which second flat tubes 4 are respectively inserted; and a plurality of communication spaces 18 each communicating with a corresponding one of first insertion holes 16 and a corresponding one of second insertion holes 17 .
  • First insertion holes 16 are arranged side by side in the Z direction.
  • Second insertion holes 17 are arranged side by side in the Z direction. Each second insertion hole 17 is spaced apart in the Y direction from each first insertion hole 16 . Further, each second insertion hole 17 is spaced apart in the Z direction from each first insertion hole 16 .
  • each communication space 18 is provided to allow communication between one first insertion hole 16 and one second insertion hole 17 that is disposed adjacent to this one first insertion hole 16 in the Z direction and located above this one first insertion hole 16 .
  • each communication space 18 provides communication between one first flat tube 2 and one second flat tube 4 that is disposed adjacent to this one first flat tube 2 in the Z direction and located above this one first flat tube 2 , for refrigerant to flow therebetween.
  • bridging header 15 includes a first plate 15 A, a second plate 15 B, and a third plate 15 C.
  • First plate 15 A, second plate 15 B, and third plate 15 C are stacked in the X direction.
  • First plate 15 A is disposed on the side close to first heat exchange portion 11 and second heat exchange portion 12 with respect to second plate 15 B and third plate 15 C in the X direction.
  • Third plate 15 C is disposed on the side opposite to first heat exchange portion 11 and second heat exchange portion 12 with respect to first plate 15 A and second plate 15 B in the X direction.
  • Second plate 15 B is sandwiched between first plate 15 A and third plate 15 C in the X direction.
  • First plate 15 A, second plate 15 B, and third plate 15 C are connected and fixed to each other in a water-tight manner.
  • the materials forming first plate 15 A, second plate 15 B, and third plate 15 C include aluminum (Al), for example.
  • first plate 15 A is provided with a plurality of through holes.
  • the through holes provided in first plate 15 A constitute first insertion holes 16 or second insertion holes 17 .
  • first insertion holes 16 and second insertion holes 17 are provided as through holes in first plate 15 A.
  • First insertion holes 16 and second insertion holes 17 each may be formed by any method and, for example, are formed by press working.
  • First plate 15 A serves as a connection plate connected to each first flat tube 2 and each second flat tube 4 in a water-tight manner.
  • second plate 15 B is provided with a plurality of through holes.
  • the inner space of each through hole provided in second plate 15 B provides communication space 18 .
  • each communication space 18 is an inner space of each of the plurality of through holes provided in second plate 15 B.
  • each through hole provided in second plate 15 B is provided to overlap with the entirety of one first insertion hole 16 and one second insertion hole 17 .
  • the opening end of each through hole provided in second plate 15 B is located outside each of the opening ends of each first insertion hole 16 and each second insertion hole 17 provided in first plate 15 A.
  • Each through hole provided in second plate 15 B may be formed by any method and, for example, are formed by press working.
  • Second plate 15 B is a flow path plate providing communication space 18 as a refrigerant flow path between first flat tube 2 and second flat tube 4 .
  • one first flat tube 2 connected to one communication space 18 is located lower in the Z direction than one second flat tube 4 connected to this one communication space 18 .
  • the uppermost portion of one first flat tube 2 connected to one communication space 18 is located at the same height in the Z direction as the lowermost portion of one second flat tube 4 connected to this one communication space 18 , or located lower than the lowermost portion.
  • each through hole provided in second plate 15 B has a pair of inclined surfaces facing each other in the Z direction and inclined with respect to the X direction and the Y direction.
  • the pair of inclined surfaces is inclined gradually upward to the leeward side.
  • the distance between the pair of inclined surfaces in the Z direction is larger than the width of each first insertion hole 16 in the Z direction and the width of each second insertion hole 17 in the Z direction.
  • third plate 15 C is disposed on the side opposite to each first insertion hole 16 and each second insertion hole 17 with respect to each communication space 18 , and closes one end of each communication space 18 in the X direction.
  • third plate 15 C no through hole is formed in a region overlapping with communication space 18 when viewed in the X direction.
  • Third plate 15 C forms what is called an outer shell plate.
  • first plate 15 A is smaller in thickness than second plate 15 B.
  • Third plate 15 C is smaller in thickness than second plate 15 B.
  • First plate 15 A is larger in thickness than third plate 15 C, for example.
  • First flat tube 2 is fixed to first plate 15 A, for example, by a brazing material.
  • first flat tube 2 and second insertion hole 17 are fixed to first plate 15 A by a brazing material.
  • second plate 15 B and third plate 15 C are fixed to first plate 15 A by a brazing material.
  • each first flat tube 2 , each second flat tube 4 , and bridging header 15 are connected and fixed to each other in a water-tight manner.
  • each of second flat tubes 4 is disposed not to overlap with each of first flat tubes 2 when viewed in the Y direction.
  • each second flat tube 4 disposed on the leeward side is not located in the dead water zone of each first flat tube 2 disposed on the windward side.
  • the heat exchange performance of heat exchanger 100 is enhanced as compared with the heat exchange performance of the heat exchanger in which each first flat tube and each second flat tube are disposed at the same height in the vertical direction.
  • bridging header 15 of heat exchanger 100 includes: first plate 15 A provided with first insertion holes 16 through which the second ends of first flat tubes 2 are respectively inserted and second insertion holes 17 through which the second ends of second flat tubes 4 are respectively inserted; and second plate 15 B provided with communication spaces 18 each communicating with a corresponding one of first insertion holes 16 and a corresponding one of second insertion holes 17 .
  • each of first plate 15 A and second plate 15 B formed of separate plate members is provided with: first insertion holes 16 and second insertion holes 17 through which first flat tubes 2 and second flat tubes 4 are respectively inserted; and communication spaces 18 each providing communication between each first flat tube 2 and each second flat tube 4 for refrigerant to flow therebetween.
  • first insertion holes 16 and second insertion holes 17 through which first flat tubes 2 and second flat tubes 4 are respectively inserted
  • communication spaces 18 each providing communication between each first flat tube 2 and each second flat tube 4 for refrigerant to flow therebetween.
  • each second flat tube 4 is disposed not to overlap with each first flat tube 2 when viewed in the Y direction, the insertion margins for each first insertion hole 16 and each second insertion hole 17 can be readily ensured and the volume of each communication space 18 can be readily increased, as compared with the bridging header in which each first insertion hole, each second insertion hole, and each communication space are provided in one member.
  • heat exchanger 100 including bridging header 15 described above the heat exchange performance can be readily enhanced as compared with the heat exchanger including the bridging header in which each first insertion hole, each second insertion hole, and each communication space are provided in one member.
  • first plate 15 A is smaller in thickness than second plate 15 B. This makes it possible to simultaneously increase the volume of each communication space 18 and the insertion margins for each first insertion hole 16 and each second insertion hole 17 , as compared with the case in which the thickness of first plate 15 A is equal to or larger than the thickness of second plate 15 B.
  • one first flat tube 2 connected to one communication space 18 is located lower in the Z direction than one second flat tube 4 connected to this one communication space 18 .
  • Each communication space 18 only needs to provide communication between at least one first flat tube 2 and at least one second flat tube 4 for refrigerant to flow therebetween.
  • Each communication space 18 may be formed, for example, to provide communication between the plurality of first flat tubes 2 and the plurality of second flat tubes 4 for refrigerant to flow therebetween.
  • Second plate 15 B may be provided with a plurality of recesses in place of the plurality of through holes.
  • each communication space 18 is formed of an inner space of a recess provided in second plate 15 B.
  • Bridging header 15 may not include third plate 15 C and may be formed as a multilayer body of first plate 15 A and second plate 15 B.
  • a plurality of recesses 15 D may be provided in the surface of third plate 15 C on the side close to second plate 15 B.
  • Each of the plurality of recesses 15 D is provided to overlap with each of the through holes provided in second plate 15 B when viewed in the X direction.
  • the region of third plate 15 C where no recess 15 D is provided is formed to overlap with the region of second plate 15 B where no through hole is provided when viewed in the X direction.
  • the inner space of each recess 15 D provided in third plate 15 C communicates with the inner space of each through hole provided in second plate 15 B, and each communication space 18 is formed of the above-mentioned two inner spaces.
  • second plate 15 B may be configured as a multilayer body formed of a plurality of plates. As long as the entire thickness of second plate 15 B is larger than the thickness of first plate 15 A, the thickness of each plate forming second plate 15 B may be equal to or smaller than the thickness of first plate 15 A.
  • second plate 15 B can be enhanced without impairing the formability of second plate 15 B as compared with the case in which second plate 15 B is formed as one plate.
  • bridging header 15 the plurality of first insertion holes 16 , the plurality of second insertion holes 17 , and the plurality of communication spaces 18 may be provided in one member.
  • Bridging header 15 as described above may be formed by laser processing, for example.
  • a heat exchanger according to the second embodiment has basically the same configuration and exhibits basically the same effect as those of heat exchanger 100 according to the first embodiment, but is different from heat exchanger 100 in that each first flat tube 2 and each second flat tube 4 have upper surfaces 2 A and 4 A, respectively, inclined with respect to the horizontal direction and that each communication space 18 extends along upper surfaces 2 A and 4 A, as shown in FIGS. 11 to 13 .
  • the angle formed by upper surface 2 A with respect to the horizontal direction is 5 degrees or more and 45 degrees or less, for example.
  • the angle formed by upper surface 4 A with respect to the horizontal direction is 5 degrees or more and 45 degrees or less, for example.
  • the angle formed by upper surface 2 A of first flat tube 2 with respect to the horizontal direction is, for example, equal to the angle formed by upper surface 4 A of second flat tube 4 with respect to the horizontal direction.
  • Upper surface 2 A of one first flat tube 2 connected to one communication space 18 is, for example, disposed to be flush with upper surface 4 A of one second flat tube 4 connected to this one communication space 18 .
  • each first flat tube 2 and each second flat tube 4 have upper surfaces 2 A and 4 A, respectively, inclined with respect to the horizontal direction, and each communication space 18 extends along upper surfaces 2 A and 4 A, and thereby, imbalance in distribution of the refrigerant from communication space 18 to the flow paths of first flat tubes 2 is suppressed.
  • a heat exchanger 101 according to the third embodiment has basically the same configuration and exhibits basically the same effect as those of heat exchanger 100 according to the first embodiment, but is different from heat exchanger 100 in that bridging header 15 is divided into a plurality of sections as shown in FIGS. 14 to 16 .
  • Bridging header 15 is divided into a first bridging header 19 disposed above in the Z direction and a second bridging header 20 disposed below in the Z direction.
  • the plurality of first flat tubes 2 are divided into first flat tubes 2 of a first group disposed above and first flat tubes 2 of a second group disposed below first flat tubes 2 of the first group.
  • the plurality of second flat tubes 4 are divided into second flat tubes 4 of a first group disposed above and second flat tubes 4 of a second group disposed below second flat tubes 4 of the first group.
  • First bridging header 19 is connected to each of the second ends of first flat tubes 2 of the first group and each of the second ends of second flat tubes 4 of the first group, and allows merging of the refrigerant having flowed out of each of second flat tubes 4 of the first group and also allows splitting of the refrigerant that is to flow into each of first flat tubes 2 of the first group.
  • Second bridging header 20 is connected to each of the second ends of first flat tubes 2 of the second group and each of the second ends of second flat tubes 4 of the second group, and allows merging of the refrigerant having flowed out of each of second flat tubes 4 of the second group and also allows splitting of the refrigerant that is to flow into each of first flat tubes 2 of the second group.
  • First bridging header 19 includes a first plate 19 A, a second plate 19 B, and a third plate 19 C.
  • First plate 19 A, second plate 19 B, and third plate 19 C have the same configurations as those of first plate 15 A, second plate 15 B, and third plate 15 C described above.
  • Second bridging header 20 includes a first plate 20 A, a second plate 20 B, and a third plate 20 C.
  • First plate 20 A, second plate 20 B, and third plate 20 C have the same configurations as those of first plate 15 A, second plate 15 B, and third plate 15 C described above.
  • First plates 19 A and 20 A are configured as plate members different from each other, for example.
  • Second plates 19 B and 20 B are configured as plate members different from each other, for example.
  • Third plates 19 C and 20 C are configured as plate members different from each other, for example. Note that first plates 19 A and 20 A may be configured as one plate member. Second plates 19 B and 20 B may be configured as one plate member.
  • Third plates 19 C and 20 C may be configured as one plate member, for example.
  • each through hole provided in each of first plates 19 A and 20 A constitutes a first insertion hole 21 or a second insertion hole 22 .
  • each first insertion hole 21 and each second insertion hole 22 are provided as a through hole in each of first plates 19 A and 20 A.
  • second plates 19 B and 20 B each are provided with a plurality of through holes.
  • the inner space of each through hole provided in each of second plates 19 B and 20 B provides a communication space 23 .
  • Each communication space 23 is an inner space of each of the plurality of through holes provided in each of second plates 19 B and 20 B.
  • each through hole provided in each of second plates 19 B and 20 B is formed to overlap with the entirety of one first insertion hole 21 and one second insertion hole 22 .
  • the opening end of each through hole provided in each of second plates 19 B and 20 B is located outside each of the opening ends of each first insertion hole 21 and each second insertion hole 22 provided in each of first plates 19 A and 20 A.
  • one first flat tube 2 connected to one communication space 23 is located lower in the Z direction than one second flat tube 4 connected to this one communication space 23 .
  • the uppermost portion of one first flat tube 2 connected to one communication space 18 is disposed at the same height in the Z direction as the lowermost portion of one second flat tube 4 connected to this one communication space 18 , or located lower than the lowermost portion.
  • each through hole provided in each of second plates 19 B and 20 B has a pair of inclined surfaces facing each other in the Z direction and inclined with respect to the X direction and the Y direction.
  • the pair of inclined surfaces is inclined gradually upward to the leeward side.
  • the distance between the pair of inclined surfaces in the Z direction is larger than the width of each first insertion hole 21 in the Z direction and the width of each second insertion hole 22 in the Z direction.
  • third plates 19 C and 20 C each are disposed on the side opposite to each first insertion hole 21 and each second insertion hole 22 with respect to each communication space 23 , and close one end of each communication space 23 in the X direction.
  • no through hole is provided in a region overlapping with communication space 23 when viewed in the X direction.
  • a refrigeration cycle apparatus 200 according to the fourth embodiment includes any one of the heat exchangers according to the first to third embodiments as an evaporator.
  • Refrigeration cycle apparatus 200 mainly includes a compressor 111 , heat exchangers 100 , 101 , a heat exchanger 113 , and an expansion valve 114 .
  • second header 14 serves as an inflow portion of refrigerant
  • first header 13 serves as an outflow portion of refrigerant.
  • the refrigerant flows through second header 14 , second heat exchange portion 12 , bridging header 15 , first heat exchange portion 11 , and first header 13 in this order.
  • refrigeration cycle apparatus 200 may further include a four-way valve 112 for switching the flow direction of the refrigerant.
  • Four-way valve 112 switches the operation mode between an operation mode in which heat exchanger 100 , 101 serves as an evaporator and an operation mode in which heat exchanger 100 , 101 serves as a condenser.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
US18/027,236 2020-10-20 2020-10-20 Heat exchanger and refrigeration cycle apparatus Pending US20230375283A1 (en)

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WO2015045105A1 (ja) * 2013-09-27 2015-04-02 三菱電機株式会社 熱交換器及びそれを用いた空気調和機
JP2015113983A (ja) 2013-12-09 2015-06-22 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 熱交換器
WO2015097876A1 (ja) * 2013-12-27 2015-07-02 三菱電機株式会社 積層型ヘッダー、熱交換器、及び、空気調和装置
WO2016103437A1 (ja) * 2014-12-26 2016-06-30 三菱電機株式会社 冷凍サイクル装置
CN108474632B (zh) * 2015-12-21 2020-01-07 三菱电机株式会社 热交换器及制冷循环装置
WO2017126019A1 (ja) * 2016-01-19 2017-07-27 三菱電機株式会社 熱交換器
JP6826133B2 (ja) * 2017-01-31 2021-02-03 三菱電機株式会社 熱交換器及び冷凍サイクル装置
JP7078840B2 (ja) * 2018-01-19 2022-06-01 ダイキン工業株式会社 熱交換器および空気調和装置
WO2020044391A1 (ja) * 2018-08-27 2020-03-05 三菱電機株式会社 熱交換器、熱交換器ユニット、及び冷凍サイクル装置

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JPWO2022085067A1 (zh) 2022-04-28

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