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WO2022102040A1 - 室内熱交換器、及び空気調和機の室内機 - Google Patents

室内熱交換器、及び空気調和機の室内機 Download PDF

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Publication number
WO2022102040A1
WO2022102040A1 PCT/JP2020/042205 JP2020042205W WO2022102040A1 WO 2022102040 A1 WO2022102040 A1 WO 2022102040A1 JP 2020042205 W JP2020042205 W JP 2020042205W WO 2022102040 A1 WO2022102040 A1 WO 2022102040A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
shaped member
heat exchanger
heat transfer
indoor
Prior art date
Application number
PCT/JP2020/042205
Other languages
English (en)
French (fr)
Inventor
一紀 福田
昌彦 高木
晃一 遠原
幸大 宮川
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2022561770A priority Critical patent/JP7471446B2/ja
Priority to PCT/JP2020/042205 priority patent/WO2022102040A1/ja
Priority to DE112020007772.1T priority patent/DE112020007772T5/de
Priority to US18/044,588 priority patent/US20230332776A1/en
Priority to AU2020476620A priority patent/AU2020476620B2/en
Publication of WO2022102040A1 publication Critical patent/WO2022102040A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0067—Indoor units, e.g. fan coil units characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
    • 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
    • F28D1/047—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 bent, e.g. in a serpentine or zig-zag
    • 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
    • F28D1/047—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 bent, e.g. in a serpentine or zig-zag
    • F28D1/0475—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 bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • 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
    • 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
    • F28F9/026—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/165—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • F28F9/167—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets the parts being inserted in the heat-exchange conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • 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
    • F28D2001/0253—Particular components
    • F28D2001/026—Cores
    • F28D2001/0266—Particular core assemblies, e.g. having different orientations or having different geometric features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • 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
    • 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
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding
    • F28F2275/065—Fastening; Joining by welding by ultrasonic or vibration welding
    • 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
    • F28F2275/20—Fastening; Joining with threaded elements

Definitions

  • the present disclosure relates to an indoor heat exchanger that uses water as a heat medium, and an indoor unit of an air conditioner equipped with an indoor heat exchanger.
  • Patent Document 1 discloses an indoor heat exchanger having a header body including a header body of a circular tube and a plurality of branch pipes branching from the header body corresponding to a plurality of flow paths.
  • This disclosure is made in order to solve the above-mentioned problems. It is an indoor heat exchanger that uses water as a heat medium, and the size of the housing of the indoor unit is increased while suppressing corrosion of the heat transfer tube. Provided is an indoor heat exchanger that does not require an indoor heat exchanger, and an indoor unit of an air conditioner provided with an indoor heat exchanger.
  • the indoor heat exchanger includes a plurality of heat transfer tubes having a flow path through which water of a heat medium flows, and a header that distributes water flowing in from an inflow tube connected to the heat source side to the plurality of heat transfer tubes.
  • the header is formed to face a first plate-like member having a plurality of starter openings communicating with the start ends of the plurality of heat transfer tubes, an inflow port into which water flows from the inflow pipe, and a plurality of starter openings. It has a distribution recess that communicates with the inlet, and has a second plate-like member joined to the first plate-like member.
  • the header of the indoor heat exchanger has a first plate-shaped member. Therefore, by increasing the number of opening ends of the first plate-shaped member, the header can cope with the increase in the number of passes without increasing the size of the first plate-shaped member. Therefore, even if water is used as the heat medium in the indoor heat exchanger, it is not necessary to increase the size of the housing of the indoor unit while suppressing the corrosion of the heat transfer tube.
  • FIG. 1 It is a top perspective view which shows the indoor unit 1 which concerns on Embodiment 1.
  • FIG. It is a perspective view which shows the room heat exchanger 12 which concerns on Embodiment 1.
  • FIG. It is an exploded perspective view which shows the indoor heat exchanger 12 which concerns on Embodiment 1.
  • FIG. It is an exploded perspective view which shows the indoor heat exchanger 12 which concerns on Embodiment 1.
  • FIG. It is an exploded perspective view which shows the indoor heat exchanger 12 which concerns on Embodiment 1.
  • FIG. It is an exploded perspective view which shows the room heat exchanger 112 which concerns on Embodiment 2.
  • FIG. It is an exploded perspective view which shows the room heat exchanger 112 which concerns on Embodiment 2.
  • FIG. It is a side view which shows the room heat exchanger 112 which concerns on Embodiment 2.
  • FIG. 1 It is sectional drawing of the room heat exchanger 112 which concerns on Embodiment 2.
  • FIG. 2 It is sectional drawing of the room heat exchanger 112 which concerns on Embodiment 2.
  • FIG. It is sectional drawing of the room heat exchanger 112 which concerns on Embodiment 2.
  • Embodiment 1 the indoor unit 1 of the air conditioner according to the first embodiment will be described.
  • the indoor unit 1 is connected to a repeater that supplies hot or cold heat generated by the heat source unit to the indoor unit 1 via a heat medium pipe through which water flows as a heat medium.
  • FIG. 1 is a top perspective view showing the indoor unit 1 according to the first embodiment.
  • the orientation when the indoor unit 1 is installed in a usable orientation is used as a reference.
  • the indoor unit 1 sucks indoor air from a suction port (not shown) formed in the center, and blows out harmonious air from air outlets (not shown) formed on four sides of the suction port.
  • the indoor unit 1 has a housing 11, an indoor heat exchanger 12, and an indoor blower 13.
  • the housing 11 has a casing 21 and an inner cover 22.
  • the casing 21 is a box body having an opening at the upper side and a substantially square shape at the lower surface, and constitutes an outer shell of the indoor unit 1.
  • the casing 21 is made of, for example, metal or resin.
  • the casing 21 is fixed to the ceiling.
  • a suction port and an outlet are formed in the casing 21.
  • the inner cover 22 is a resin box provided inside the casing 21 and reinforces the casing 21.
  • the indoor heat exchanger 12 is provided on the four sides inside the casing 21.
  • An inflow pipe 31 and an outflow pipe 32 are connected to the indoor heat exchanger 12.
  • the inflow pipe 31 is a pipe connected to the heat medium pipe and allows water flowing from the repeater side to flow into the indoor heat exchanger 12.
  • the outflow pipe 32 is a pipe connected to the heat medium pipe and allows water to flow out from the indoor heat exchanger 12 to the repeater side.
  • the indoor heat exchanger 12 regulates the temperature of the indoor air by exchanging heat between the water flowing inside and the indoor air. A detailed description of the configuration of the indoor heat exchanger 12 will be described later.
  • the indoor blower 13 is arranged in the center of the housing 11 and is surrounded on all sides by the indoor heat exchanger 12.
  • the indoor blower 13 is, for example, a turbofan, and the rotation axis extends in the vertical direction.
  • the indoor blower 13 rotates to send air in all directions to promote heat exchange in the indoor heat exchanger 12.
  • FIG. 2 is a perspective view showing the indoor heat exchanger 12 according to the first embodiment.
  • the indoor heat exchanger 12 has a heat transfer tube 41, fins 42, and a header 43.
  • a plurality of fins 42 are shown schematically together.
  • FIG. 3 is an exploded perspective view showing the indoor heat exchanger 12 according to the first embodiment.
  • FIG. 4 is an exploded perspective view showing the indoor heat exchanger 12 according to the first embodiment. 3 and 4 show the disassembled indoor heat exchanger 12 in an enlarged manner as compared with FIG. 2. Further, FIGS. 3 and 4 show the indoor heat exchanger 12 from different angles.
  • the indoor heat exchanger 12 includes a plurality of heat transfer tubes 41. Each heat transfer tube 41 is, for example, a copper tube, and a flow path through which a heat medium flows is formed therein. As the heat medium, water is used as described above. In the indoor heat exchanger 12 of the first embodiment, ten heat transfer tubes 41 are used, and ten flow paths are present.
  • the start end 51 and the end end 52 are connected to the header 43 and are folded back at the hairpin portion 53.
  • the path from the start end 51 to the hairpin portion 53 of the heat transfer tube 41 is referred to as an outward path, and the path from the hairpin portion 53 to the end path 52 is referred to as a return path.
  • the plurality of heat transfer tubes 41 are formed by bending so as to have a substantially square shape as a whole, and the header 43 and the plurality of hairpin portions 53 are located at the same corner of the square shape.
  • the hairpin portions 53 of all the heat transfer tubes 41 are arranged so as to be folded diagonally upward from the outward path to the return path. Further, in all the heat transfer tubes 41, the outward path and the return path extend in parallel. Therefore, the heat transfer tube 41 is connected to the header 43 so that the end 52 is located diagonally above the start end 51.
  • the plurality of heat transfer tubes 41 are arranged in parallel in the vertical direction, and the positions of the start end 51 and the end 52 in the left-right direction are aligned. That is, in the header 43, a row of start ends 51 and a row of ends 52 arranged in the vertical direction are configured, and the start ends 51 and the ends 52 constituting the respective rows are arranged alternately.
  • a plurality of fins 42 are provided in the plurality of heat transfer tubes 41.
  • the fin 42 is, for example, a plate fin through which the heat transfer tube 41 is inserted.
  • the plurality of fins 42 are arranged side by side in the direction in which the heat transfer tube 41 extends.
  • the fins 42 promote heat exchange between water flowing inside the heat transfer tube 41 and air.
  • the inflow pipe 31 and the outflow pipe 32 are connected to the header 43.
  • the header 43 distributes the water flowing from the inflow pipe 31 to a plurality of starting ends 51. Further, the header 43 collects the water flowing from the plurality of terminations 52 and flows it into the outflow pipe 32. The detailed flow of water in the indoor heat exchanger 12 will be described later.
  • the header 43 has a first plate-shaped member 61 and a second plate-shaped member 62.
  • the first plate-shaped member 61 and the second plate-shaped member 62 are joined so that their surfaces face each other.
  • the first plate-shaped member 61 has a substantially rectangular shape and is made of a dezinc-resistant brass alloy.
  • the first plate-shaped member 61 has substantially the same width and height as the fin 42 when viewed from the inflow pipe 31 and the outflow pipe 32 direction.
  • the first plate-shaped member 61 has a first insertion portion 65 and a second insertion portion 66.
  • the first insertion portion 65 is a circular tube having a starting end opening 67 formed in the center, and is provided on a plurality of surfaces of the first plate-shaped member 61 on the opposite side to the second plate-shaped member 62.
  • the opening end opening 67 penetrates from the tip of the first insertion portion 65 to the surface on the second plate-shaped member 62 side.
  • Each of the first insertion portions 65 is provided at a position corresponding to one of the starting ends 51 of the plurality of heat transfer tubes 41.
  • the plurality of first insertion portions 65 are inserted into the starting ends 51 of the plurality of heat transfer tubes 41 and fixed by brazing. As a result, the outward path of the heat transfer tube 41 and the opening end opening 67 communicate with each other.
  • the second insertion portion 66 is a circular tube having a terminal opening 68 formed in the center, and is provided on a plurality of surfaces of the first plate-shaped member 61 opposite to the second plate-shaped member 62.
  • the terminal opening 68 penetrates from the tip of the second insertion portion 66 to the surface on the second plate-shaped member 62 side.
  • Each of the second insertion portions 66 is provided at a position corresponding to one of the terminal 52s of the plurality of heat transfer tubes 41.
  • the plurality of first insertion portions 65 are inserted into the terminal 52s of the plurality of heat transfer tubes 41 and fixed by brazing. As a result, the return path of the heat transfer tube 41 and the terminal opening 68 communicate with each other.
  • the number of the first insertion portion 65 and the second insertion portion 66 that is, the number of the start end opening 67 and the end opening 68 is appropriately adjusted to be the same as the number of the heat transfer tubes 41, that is, the number of flow paths.
  • the numbers of the start end opening 67 and the end opening 68 may be changed. It is not necessary to increase the size of the plate-shaped member 61 of 1.
  • the second plate-shaped member 62 has a substantially rectangular shape and is made of a dezinc-resistant brass alloy.
  • the second plate-shaped member 62 has substantially the same width and height as the fin 42 when viewed from the inflow pipe 31 and the outflow pipe 32 direction.
  • the inflow pipe 31 and the outflow pipe 32 are connected to the second plate-shaped member 62.
  • the second plate-shaped member 62 is formed with an inlet 72, a distribution recess 73, an outlet 74, and a collective recess 75.
  • the inflow port 72 is formed on a surface opposite to the first plate-shaped member 61.
  • the inflow port 72 communicates with the flow path of the inflow pipe 31.
  • the distribution recess 73 is formed on the surface of the first plate-shaped member 61 and faces the plurality of opening ends 67. Further, the distribution recess 73 communicates with the inflow port 72. The distribution recess 73 distributes the water that has passed through the inflow pipe 31 to the outward paths of the plurality of heat transfer pipes 41.
  • the outlet 74 is formed on the surface opposite to the first plate-shaped member 61.
  • the outlet 74 communicates with the flow path of the outflow pipe 32.
  • the collecting recess 75 is formed on the surface of the first plate-shaped member 61 and faces the plurality of terminal openings 68. Further, the collecting recess 75 communicates with the outlet 74.
  • the collecting recess 75 collects water that has passed through the return paths of the plurality of heat transfer tubes 41 and flows them into the outflow pipe 32.
  • the first plate-shaped member 61 and the second plate-shaped member 62 are joined by brazing the edge portions of the facing surfaces.
  • the edge portion of the facing surfaces of the first plate-shaped member 61 is a region on the side of the second plate-shaped member 62 that is outside the region where the start end opening 67 and the end opening 68 are formed.
  • the edge portion of the facing surfaces of the second plate-shaped member 62 is a region on the side of the first plate-shaped member 61 that is outside the region where the distribution recess 73 and the collective recess 75 are formed.
  • the flow of water in the indoor heat exchanger 12 of the first embodiment will be described.
  • the water flowing from the inflow pipe 31 passes through the inflow port 72 and flows into the distribution recess 73 of the second plate-shaped member 62.
  • the water flowing through the distribution recess 73 is distributed to the outward path of the plurality of heat transfer tubes 41 through the opening end opening 67 of the first plate-shaped member 61.
  • the water flowing in the outward path of the heat transfer tube 41 is folded back at the hairpin portion 53 and flows to the return path of the plurality of heat transfer tubes 41.
  • the water flowing through the return path of the plurality of heat transfer tubes 41 passes through the terminal opening 68 of the first plate-shaped member 61, collects in the collecting recess 75 of the second plate-shaped member 62, passes through the outlet 74, and passes through the outflow pipe. It flows out to 32.
  • the header 43 of the indoor heat exchanger 12 has a first plate-shaped member 61. Therefore, by increasing the number of opening ends 67 of the first plate-shaped member 61, the header 43 can cope with the increase in the number of passes without increasing the size of the first plate-shaped member 61. Therefore, even if water is used as the heat medium in the indoor heat exchanger 12, it is not necessary to increase the size of the housing 11 of the indoor unit 1 while suppressing the corrosion of the heat transfer tube 41.
  • the header 43 of the first embodiment is configured by laminating the first plate-shaped member 61 and the second plate-shaped member 62. Therefore, the header 43 of the first embodiment has a smaller thickness than the case where it has a plurality of branch pipes.
  • the first plate-shaped member 61 and the second plate-shaped member 62 are made of a dezinc-resistant brass alloy. Therefore, dezincification corrosion is suppressed in the first plate-shaped member 61 and the second plate-shaped member 62.
  • the header 43 has both distribution and set functions. Therefore, the amount of brazing between the first plate-shaped member 61 and the second plate-shaped member 62 is smaller than that in the case where the portion performing distribution and the portion performing assembly are separate bodies.
  • FIG. 5 is an exploded perspective view showing the indoor heat exchanger 112 according to the second embodiment.
  • FIG. 6 is an exploded perspective view showing the indoor heat exchanger 112 according to the second embodiment. 5 and 6 show the indoor heat exchanger 112 in a disassembled state. Further, FIGS. 5 and 6 show the indoor heat exchanger 112 from different angles. As shown in FIGS. 5 and 6, the indoor heat exchanger 112 according to the second embodiment is different from the first embodiment in that the header 143 has a third plate-shaped member 181.
  • the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted, and the differences from the first embodiment will be mainly described.
  • the hairpin portions 53 of the four upper heat transfer tubes 41 are provided so as to be folded straight up from the outward path to the return path. Therefore, the four heat transfer tubes 41 on the upper side are connected to the header 43 so that the end 52 is located directly above the start end 51.
  • the hairpin portions 53 of the lower six heat transfer tubes 41 are provided so as to be folded diagonally upward from the outward path to the return path, as in the first embodiment. Therefore, the upper six heat transfer tubes 41 are connected to the header 43 so that the end 52 is located diagonally above the start end 51.
  • the third plate-shaped member 181 is provided between the first plate-shaped member 61 and the second plate-shaped member 62, and partitions the flow path.
  • the third plate-shaped member 181 has a substantially rectangular shape and is made of a dezinc-resistant brass alloy.
  • the third plate-shaped member 181 is formed with a distribution adjustment opening 191 and an assembly adjustment opening 192, and an adjustment recess 193.
  • a plurality of distribution adjustment openings 191 are formed in the third plate-shaped member 181.
  • the plurality of distribution adjusting openings 191 are formed at positions facing the plurality of opening ends 67, and penetrate from the surface on the side of the first plate-shaped member 61 to the surface on the side of the second plate-shaped member 62.
  • Each distribution adjusting opening 191 communicates one of the plurality of opening ends 67 with the distribution recess 73.
  • a plurality of assembly adjusting openings 192 are formed in the third plate-shaped member 181.
  • the plurality of assembly adjusting openings 192 are formed at positions facing the plurality of terminal openings 68, and penetrate from the surface on the side of the first plate-shaped member 61 to the surface on the side of the second plate-shaped member 62.
  • Each set adjustment opening 192 communicates one of the plurality of end openings 68 with the set recess 75.
  • Two adjustment recesses 193 are formed on the surface of the third plate-shaped member 181 on the side of the first plate-shaped member 61.
  • Each adjustment recess 193 has a terminal opening 68 corresponding to the terminal 52 of one of the two heat transfer tubes 41 folded in the vertical direction and the other of the two heat transfer tubes 41 on the surface on the side of the first plate-shaped member 61. It is formed so as to face the start end opening 67 corresponding to the start end 51 of the heat transfer tube 41.
  • the adjustment recess 193 does not penetrate the second plate-shaped member 62 side.
  • the adjusting recess 193 communicates the termination opening 68 corresponding to the end 52 of one heat transfer tube 41 and the start end opening 67 corresponding to the start end 51 of the other heat transfer tube 41 facing the adjustment recess 193. That is, the adjusting recess 193 allows water to flow from the return path of one heat transfer tube 41 to the outward path of the other heat transfer tube 41.
  • the indoor heat exchanger 112 since water does not collect and flows continuously in the two sets of heat transfer tubes 41 out of the ten heat transfer tubes 41 due to the two adjustment recesses 193, the indoor heat exchanger 112 has , There are eight channels.
  • the first plate-shaped member 61 and the third plate-shaped member 181 are fixed by brazing the edge portions of the facing surfaces.
  • the edge portions of the facing surfaces of the third plate-shaped member 181 for brazing with the first plate-shaped member 61 are the distribution adjustment opening 191 and the collective adjustment opening 192 of the third plate-shaped member 181. And a region outside the region where the adjustment recess 193 is formed.
  • both the second plate-shaped member 62 and the third plate-shaped member 181 are fixed by brazing the edge portions of the facing surfaces. In brazing with the second plate-shaped member 62, the edge portion of the facing surface of the third plate-shaped member 181 is larger than the distribution adjustment opening 191 and the collective adjustment opening 192 of the third plate-shaped member 181. The outer area.
  • the header 143 Since the header 143 has a portion for distributing and a portion for assembling, the entire adjusting recess 193 of the third plate-shaped member 181 faces the first plate-shaped member 61. Therefore, the third plate-shaped member 181 can communicate the outward path and the return path of the heat transfer tube 41 by the adjusting recess 193 to partition the flow path.
  • FIG. 7 is a side view showing the indoor heat exchanger 112 according to the second embodiment.
  • FIG. 8 is a cross-sectional view of the indoor heat exchanger 112 according to the second embodiment.
  • FIG. 9 is a cross-sectional view of the indoor heat exchanger 112 according to the second embodiment.
  • FIG. 10 is a cross-sectional view of the indoor heat exchanger 112 according to the second embodiment.
  • FIG. 8 is a cross-sectional view when the header 143 of the indoor heat exchanger 112 of FIG. 7 is cut in the cross section in the AA direction.
  • FIG. 9 is a cross-sectional view when the header 143 of the indoor heat exchanger 112 of FIG. 7 is cut in the cross section in the BB direction.
  • FIG. 8 is a cross-sectional view when the header 143 of the indoor heat exchanger 112 of FIG. 7 is cut in the cross section in the BB direction.
  • FIGS. 8 to 10 are cross-sectional views when the header 143 of the indoor heat exchanger 112 of FIG. 7 is cut in the cross section in the CC direction.
  • the arrows shown by solid lines indicate the flow of water.
  • the arrows with the same reference numerals indicate that the flow of water is continuous.
  • the flow of water in the indoor heat exchanger 112 will be described with reference to FIGS. 8 to 10.
  • the water flowing from the inflow pipe 31 passes through the inflow port 72 and flows into the distribution recess 73 of the second plate-shaped member 62.
  • the water (F1 to F8) flowing through the distribution recess 73 passes through the distribution adjustment opening 191 of the third plate-shaped member 181 and the start end opening 67 of the first plate-shaped member 61, and enters the outward path of the plurality of heat transfer tubes 41. Will be distributed.
  • the water (F1 to F8) flowing in the outward path of the heat transfer tube 41 is folded back at the hairpin portion 53 and flows in the return path.
  • the water (F1 to F6) flowing through the return path of the lower six heat transfer tubes 41 passes through the terminal opening 68 of the first plate-shaped member 61 and the collective adjustment opening 192 of the third plate-shaped member 181. It collects in the collecting recess 75 of the second plate-shaped member 62 and flows out to the outflow pipe 32 through the outflow port 74.
  • the water (F7 and F8) flowing through the return path of the four upper heat transfer tubes 41 passes through the terminal opening 68 of the first plate-shaped member 61 and then in the adjusting recess 193. Wrap back.
  • the water (R1 and R2) folded back in the adjusting recess 193 passes through the opening end opening 67 of the first plate-shaped member 61 and flows again in the outward path of the plurality of heat transfer tubes 41.
  • the water (E1 and E2) flowing in the outward path of the heat transfer tube 41 is folded back at the hairpin portion 53 and flows in the return path.
  • the water (E1 and E2) flowing through the return path passes through the terminal opening 68 of the first plate-shaped member 61 and the collecting adjustment opening 192 of the third plate-shaped member 181 and is a collecting depression of the second plate-shaped member 62. It gathers at 75 and flows out to the outflow pipe 32 through the outflow port 74.
  • the indoor heat exchanger 112 has a third plate-shaped member 181. Therefore, the indoor heat exchanger 112 can reduce the number of flow paths so that the flow rate of water does not decrease excessively. Therefore, the indoor heat exchanger 112 can suppress the corrosion of the heat transfer tube 41.
  • the indoor heat exchanger 112 of the second embodiment has a third plate shape even when the indoor heat exchanger in which the refrigerant flows is diverted and water is used instead of the refrigerant.
  • the number of flow paths can be adjusted only by providing the member 181 and the corrosion of the heat transfer tube 41 can be suppressed.
  • the header 43 has both distribution and set functions. Therefore, the first plate-shaped member 61 and the third plate-shaped member 181 and the second plate-shaped member 62 and the second plate-shaped member 62 are compared with the case where the portion performing distribution and the portion performing assembly are separate bodies. The amount of brazing with the plate-shaped member 181 of 3 is small.
  • the second plate-shaped member 62 and the third plate-shaped member 181 are made of resin.
  • the second plate-shaped member 62 and the third plate-shaped member 181 are welded by ultrasonic waves or the like.
  • the first plate-shaped member 61 and the second plate-shaped member 62 are fastened by screws with a third plate-shaped member 181 arranged between them.
  • the header 143 of the indoor heat exchanger 112 is manufactured without using a large-scale brazing device.
  • the indoor heat exchanger 12 of the first embodiment is attached not only to the indoor unit 1 used for the multi air conditioner for a building but also to the wall surface or the like of a living room of a house, and blows out air from the front of the housing 11. It may be applied to an indoor unit or the like.
  • the case where the number of heat transfer tubes 41 and the number of flow paths is 10 has been described as an example, but the water has an appropriate flow velocity so that the heat transfer tubes 41 are not corroded by water. As long as it is maintained, it may be 2 to 9 or 11 or more. Further, the heat transfer tube 41 may be provided so that the start end 51 and the end 52 are arranged in three or more rows in the header 43.
  • header 43 may be composed of only a portion for distribution.
  • the formation location, the number, and the like of the adjustment depression 193 in the third plate-shaped member 181 of the second embodiment may be appropriately adjusted from the viewpoint of appropriately maintaining the flow velocity of water.
  • the third plate-shaped member 181 may have a plate-shaped member for partitioning a flow path between the first plate-shaped member 61 and the second plate-shaped member 62.
  • the second plate-shaped member 62 and the third plate-shaped member 181 are made of resin, but the second plate-shaped member 62 or the third plate-shaped member 62 of the second embodiment is made of resin. Any one of the plate-shaped members 181 may be made of resin. Further, the second plate-shaped member 62 of the first embodiment may be made of resin. Further, as described above, the plate-shaped member provided between the first plate-shaped member 61 and the second plate-shaped member 62 may be made of resin in addition to the third plate-shaped member 181.

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)

Abstract

室内熱交換器は、内部に熱媒体の水が流れる流路を有する複数の伝熱管と、熱源側に接続された流入管から流入した水を複数の伝熱管に分配するヘッダと、を備え、ヘッダは、複数の伝熱管の始端と連通する複数の始端開口を有する第１の板状部材と、流入管から水が流入する流入口と、複数の始端開口に対向して形成され、流入口と連通する分配窪みと、を有し、第１の板状部材と接合された第２の板状部材と、を有する。

Description

室内熱交換器、及び空気調和機の室内機
　本開示は、熱媒体として水を用いる室内熱交換器、及び室内熱交換器を備える空気調和機の室内機に関する。
　従来、複数の流路が形成された室内熱交換器が知られている。特許文献１には、円管のヘッダ本体と、ヘッダ本体から複数の流路に対応して分岐する複数の分岐管とからなるヘッダを有する室内熱交換器が開示されている。
特開２０１４－２１５０１１号公報
　一般に、室内熱交換器を流れる熱媒体として水を用いる場合、水の流速が速いと室内熱交換器の伝熱管が腐食する。そこで、室内熱交換器では、水の流速を抑制するために、流路の数を多くする多パス化が採用される。しかしながら、特許文献１の室内熱交換器で多パス化を採用した場合、分岐管の数が増えるため、ヘッダが全体として大型化する。また、特許文献１の室内熱交換器では、水の流速を抑制するために、ヘッダ本体の拡径化も採用される。しかしながら、ヘッダ本体の拡径化をした場合も、ヘッダが全体として大型化する。これらのヘッダの大型化に伴って、室内熱交換器を格納する室内機の筐体にも大型化する必要が生じてしまう。
　本開示は、上記のような課題を解決するためになされたもので、熱媒体として水を用いる室内熱交換器であって、伝熱管の腐食を抑制しつつ、室内機の筐体の大型化が不要な室内熱交換器、及び室内熱交換器を備える空気調和機の室内機を提供するものである。
　本開示に係る室内熱交換器は、内部に熱媒体の水が流れる流路を有する複数の伝熱管と、熱源側に接続された流入管から流入した水を複数の伝熱管に分配するヘッダと、を備え、ヘッダは、複数の伝熱管の始端と連通する複数の始端開口を有する第１の板状部材と、流入管から水が流入する流入口と、複数の始端開口に対向して形成され、流入口と連通する分配窪みと、を有し、第１の板状部材と接合された第２の板状部材と、を有する。
　本開示では、室内熱交換器のヘッダは、第１の板状部材を有する。このため、ヘッダは、第１の板状部材の始端開口の数を増やすことで、第１の板状部材を大型化せずに、多パス化に対応することができる。したがって、室内熱交換器は、熱媒体として水を用いたとしても、伝熱管の腐食を抑制しつつ、室内機の筐体の大型化が不要になる。
実施の形態１に係る室内機１を示す上面斜視図である。 実施の形態１に係る室内熱交換器１２を示す斜視図である。 実施の形態１に係る室内熱交換器１２を示す分解斜視図である。 実施の形態１に係る室内熱交換器１２を示す分解斜視図である。 実施の形態２に係る室内熱交換器１１２を示す分解斜視図である。 実施の形態２に係る室内熱交換器１１２を示す分解斜視図である。 実施の形態２に係る室内熱交換器１１２を示す側視図である。 実施の形態２に係る室内熱交換器１１２の断面図である。 実施の形態２に係る室内熱交換器１１２の断面図である。 実施の形態２に係る室内熱交換器１１２の断面図である。
　実施の形態１．
　以下、実施の形態１に係る空気調和機の室内機１について説明する。実施の形態１では、空気調和機の室内機１が天井に取付けられて、ビル用マルチエアコンとして利用される場合を例にして説明をする。室内機１は、熱媒体として水が流れる熱媒体配管を介して、熱源機にて生成された温熱又は冷熱を室内機１に供給する中継器と接続されている。
　図１は、実施の形態１に係る室内機１を示す上面斜視図である。以下の説明において、「上」又は「下」等の方向を示す語を用いた場合、室内機１が使用可能な向きに設置された際の向きを基準にしている。室内機１は、中央に形成された吸込口（図示せず）から室内の空気を吸い込み、吸込口の四方に形成された吹出口（図示せず）から調和された空気を吹き出す。図１に示すように、室内機１は、筐体１１、室内熱交換器１２、及び室内送風機１３を有している。
　筐体１１は、ケーシング２１及びインナーカバー２２を有する。ケーシング２１は、上方が開口し、下面が略四角形状の箱体であり、室内機１の外郭を構成している。ケーシング２１は、例えば、金属又は樹脂等からなる。ケーシング２１は、天井に固定されている。ケーシング２１には、吸込口及び吹出口が形成されている。インナーカバー２２は、ケーシング２１の内側に設けられた樹脂製の箱体であり、ケーシング２１を補強している。
　室内熱交換器１２は、ケーシング２１内部の四側方に設けられる。室内熱交換器１２には、流入管３１、及び流出管３２が接続されている。流入管３１は、熱媒体配管に接続され、中継器側から流れる水を室内熱交換器１２に流入させる配管である。流出管３２は、熱媒体配管に接続され、室内熱交換器１２から中継器側に水を流出させる配管である。室内熱交換器１２は、内部を流れる水と室内空気とを熱交換させることで室内空気を温調する。室内熱交換器１２の構成の詳細な説明については、後述する。
　室内送風機１３は、筐体１１の中央に配置され、四方が室内熱交換器１２に囲まれている。室内送風機１３は、例えば、ターボファンであり、回転軸が上下方向に延びている。室内送風機１３は、回転することで、四方に向かい空気を送り、室内熱交換器１２の熱交換を促す。
　図２は、実施の形態１に係る室内熱交換器１２を示す斜視図である。図２に示すように、室内熱交換器１２は、伝熱管４１、フィン４２、及びヘッダ４３を有している。なお、本開示の各図では、複数のフィン４２をまとめて概略的に示している。
　図３は、実施の形態１に係る室内熱交換器１２を示す分解斜視図である。図４は、実施の形態１に係る室内熱交換器１２を示す分解斜視図である。図３及び図４は、分解された状態の室内熱交換器１２を図２よりも拡大して示している。また、図３と図４とは、室内熱交換器１２を異なる角度から示している。図３及び図４に示すように、室内熱交換器１２には、複数の伝熱管４１を備えている。それぞれの伝熱管４１は、例えば、銅製の管であり、内部に熱媒体が流れる流路が形成されている。熱媒体としては、上述したように水が用いられている。実施の形態１の室内熱交換器１２には、１０本の伝熱管４１が用いられ、１０本の流路が存在している。複数の伝熱管４１は、始端５１及び終端５２がヘッダ４３に接続され、ヘアピン部５３で折り返されている。以下の説明では、伝熱管４１の始端５１からヘアピン部５３までを往路、ヘアピン部５３から終端５２までを復路と呼称する。複数の伝熱管４１は、全体として略四角形状となるように折り曲げて形成されており、ヘッダ４３と複数のヘアピン部５３とは、この四角形状の同じ一隅に位置している。
　実施の形態１において、全ての伝熱管４１のヘアピン部５３は、往路から復路に向かって斜め上に折り返すように配置されている。また、全ての伝熱管４１は、往路と復路とが平行に延びている。このため、伝熱管４１は、終端５２が始端５１の斜め上に位置するようにヘッダ４３に接続されている。複数の伝熱管４１同士は、上下方向に並列し、始端５１及び終端５２の左右方向の位置が揃えられている。即ち、ヘッダ４３においては、上下方向に並ぶ始端５１の列及び終端５２の列が構成されており、それぞれの列を構成する始端５１と終端５２とが互い違いに配置されている。
　複数の伝熱管４１には、複数のフィン４２が設けられている。フィン４２は、例えば、伝熱管４１が挿通されるプレートフィンである。複数のフィン４２は、伝熱管４１が延びる方向に並んで配置される。フィン４２は、伝熱管４１の内部を流れる水と空気との熱交換を促進する。
　ヘッダ４３には、流入管３１、及び流出管３２が接続されている。ヘッダ４３は、流入管３１から流れた水を複数の始端５１に分配する。また、ヘッダ４３は、複数の終端５２から流れた水を集合させて流出管３２に流す。室内熱交換器１２での詳細な水の流れについては、後述する。
　ヘッダ４３は、第１の板状部材６１及び第２の板状部材６２を有する。第１の板状部材６１と第２の板状部材６２とは、面同士が向かい合うようにして接合されている。第１の板状部材６１は、略長方形状であり、耐脱亜鉛黄銅合金からなる。第１の板状部材６１は、流入管３１、及び流出管３２方向から見た場合、フィン４２と略同等の幅及び高さを有している。第１の板状部材６１は、第１挿入部６５及び第２挿入部６６を有している。
　第１挿入部６５は、中央に始端開口６７が形成された円管状であり、第１の板状部材６１の第２の板状部材６２と反対側の面に複数設けられている。始端開口６７は、第１挿入部６５の先端から第２の板状部材６２側の面まで貫通している。第１挿入部６５のそれぞれは、複数の伝熱管４１の始端５１の１つに対応した位置に設けられている。複数の第１挿入部６５は、複数の伝熱管４１の始端５１に挿入され、ロウ付けで固定される。これにより、伝熱管４１の往路と始端開口６７とが連通する。
　第２挿入部６６は、中央に終端開口６８が形成された円管状であり、第１の板状部材６１の第２の板状部材６２と反対側の面に複数設けられている。終端開口６８は、第２挿入部６６の先端から第２の板状部材６２側の面まで貫通している。第２挿入部６６のそれぞれは、複数の伝熱管４１の終端５２の１つに対応した位置に設けられている。複数の第１挿入部６５は、複数の伝熱管４１の終端５２に挿入され、ロウ付けで固定される。これにより、伝熱管４１の復路と終端開口６８とが連通する。
　第１挿入部６５及び第２挿入部６６の数、即ち、始端開口６７及び終端開口６８の数は、伝熱管４１の本数、即ち流路の数と同じ数となるように適宜調整される。室内熱交換器１２において、水の流速を抑制するために、流路の数を多くする多パス化が採用された際にも、始端開口６７及び終端開口６８の数を変更すればよく、第１の板状部材６１を大きくする必要がない。
　第２の板状部材６２は、略長方形状であり、耐脱亜鉛黄銅合金からなる。第２の板状部材６２は、流入管３１、及び流出管３２方向から見た場合、フィン４２と略同等の幅及び高さを有している。第２の板状部材６２には、流入管３１及び流出管３２が接続される。第２の板状部材６２には、流入口７２、分配窪み７３、流出口７４、及び集合窪み７５が形成されている。流入口７２は、第１の板状部材６１と反対側の面に形成されている。流入口７２は、流入管３１の流路と連通している。分配窪み７３は、第１の板状部材６１側の面に形成され、複数の始端開口６７に対向している。また、分配窪み７３は、流入口７２と連通している。分配窪み７３は、流入管３１を通った水を複数の伝熱管４１の往路に分配する。
　流出口７４は、第１の板状部材６１と反対側の面に形成されている。流出口７４は、流出管３２の流路と連通している。集合窪み７５は、第１の板状部材６１側の面に形成され、複数の終端開口６８に対向している。また、集合窪み７５は、流出口７４と連通している。集合窪み７５は、複数の伝熱管４１の復路を通った水を集合し流出管３２に流す。
　第１の板状部材６１と第２の板状部材６２とは、向かい合う面の縁部分がロウ付けされることで、接合されている。第１の板状部材６１における向かい合う面の縁部分とは、第２の板状部材６２側の面のうち始端開口６７及び終端開口６８が形成されている領域よりも外側の領域である。第２の板状部材６２における向かい合う面の縁部分とは、第１の板状部材６１側の面のうち分配窪み７３及び集合窪み７５が形成されている領域よりも外側の領域である。
　実施の形態１の室内熱交換器１２における水の流れについて説明する。先ず、流入管３１から流入した水は、流入口７２を通り、第２の板状部材６２の分配窪み７３に流れる。分配窪み７３に流れた水は、第１の板状部材６１の始端開口６７を通って、複数の伝熱管４１の往路に分配される。伝熱管４１の往路を流れる水は、ヘアピン部５３で折り返し、複数の伝熱管４１の復路に流れる。複数の伝熱管４１の復路を流れた水は、第１の板状部材６１の終端開口６８を通って第２の板状部材６２の集合窪み７５に集合し、流出口７４を通り、流出管３２に流出する。
　実施の形態１では、室内熱交換器１２のヘッダ４３は、第１の板状部材６１を有する。このため、ヘッダ４３は、第１の板状部材６１の始端開口６７の数を増やすことで、第１の板状部材６１を大型化せずに、多パス化に対応することができる。したがって、室内熱交換器１２は、熱媒体として水を用いたとしても、伝熱管４１の腐食を抑制しつつ、室内機１の筐体１１の大型化が不要になる。
　また、実施の形態１のヘッダ４３は、第１の板状部材６１及び第２の板状部材６２を積層して構成されている。このため、実施の形態１のヘッダ４３は、複数の分岐管を有する場合と比較して、厚みが小さい。
　また、実施の形態１では、伝熱管４１として汎用的な銅管を使用した場合であっても、伝熱管４１の腐食を抑制することができる。
　また、実施の形態１では、第１の板状部材６１及び第２の板状部材６２は、耐脱亜鉛黄銅合金製である。よって、第１の板状部材６１及び第２の板状部材６２では、脱亜鉛腐食が抑制されている。
　また、本実施の形態１によれば、ヘッダ４３は、分配及び集合の両方の機能を有している。このため、分配を行う部分と集合を行う部分とが別体である場合と比較して、第１の板状部材６１と第２の板状部材６２とのロウ付け量が少ない。
　実施の形態２．
　図５は、実施の形態２に係る室内熱交換器１１２を示す分解斜視図である。図６は、実施の形態２に係る室内熱交換器１１２を示す分解斜視図である。図５及び図６は、分解された状態の室内熱交換器１１２を示している。また、図５と図６とは、室内熱交換器１１２を異なる角度から示している。図５及び図６に示すように、本実施の形態２に係る室内熱交換器１１２は、ヘッダ１４３が第３の板状部材１８１を有する点で実施の形態１と相違する。本実施の形態２では、実施の形態１と同一の部分は同一の符合を付して説明を省略し、実施の形態１との相違点を中心に説明する。
　実施の形態２では、上側の４本の伝熱管４１のヘアピン部５３は、往路から復路に向かって真上に折り返すように設けられている。このため、上側の４本の伝熱管４１は、終端５２が始端５１の真上に位置するようにヘッダ４３に接続されている。下側の６本の伝熱管４１のヘアピン部５３は、実施の形態１と同様に、往路から復路に向かって斜め上に折り返すように設けられている。このため、上側の６本の伝熱管４１は、終端５２が始端５１の斜め上に位置するようにヘッダ４３に接続されている。
　第３の板状部材１８１は、第１の板状部材６１と第２の板状部材６２との間に設けられ、流路を区画する。第３の板状部材１８１は、略長方形状であり、耐脱亜鉛黄銅合金からなる。第３の板状部材１８１には、分配調整開口１９１、集合調整開口１９２、及び調整窪み１９３が形成されている。
　分配調整開口１９１は、第３の板状部材１８１に複数形成されている。複数の分配調整開口１９１は、複数の始端開口６７に対向する位置に形成され、第１の板状部材６１側の面から第２の板状部材６２側の面を貫通している。それぞれの分配調整開口１９１は、複数の始端開口６７の内の１つと分配窪み７３とを連通させている。集合調整開口１９２は、第３の板状部材１８１に複数形成されている。複数の集合調整開口１９２は、複数の終端開口６８に対向する位置に形成され、第１の板状部材６１側の面から第２の板状部材６２側の面に貫通している。それぞれの集合調整開口１９２は、複数の終端開口６８の内の１つと集合窪み７５とを連通させている。
　調整窪み１９３は、第３の板状部材１８１の第１の板状部材６１側の面に２つ形成されている。それぞれの調整窪み１９３は、第１の板状部材６１側の面において、上下方向に折り返している２つの伝熱管４１のうち、一方の伝熱管４１の終端５２に対応する終端開口６８と他方の伝熱管４１の始端５１に対応する始端開口６７とに対向して形成されている。調整窪み１９３は、第２の板状部材６２側には、貫通していない。調整窪み１９３は、調整窪み１９３と対向する、一方の伝熱管４１の終端５２に対応する終端開口６８と他方の伝熱管４１の始端５１に対応する始端開口６７とを連通させている。つまり、調整窪み１９３は、一方の伝熱管４１の復路から他方の伝熱管４１の往路に水を流すものである。実施の形態２では、２つの調整窪み１９３によって、１０本の伝熱管４１のうち、２本２組の伝熱管４１では水が集合せずに連続して流れるため、室内熱交換器１１２には、８つの流路が存在している。
　第１の板状部材６１と第３の板状部材１８１とは、向かい合う面の縁部分がロウ付けされることで、固定されている。第１の板状部材６１とのロウ付けを行う上での第３の板状部材１８１の向かい合う面の縁部分とは、第３の板状部材１８１の分配調整開口１９１、集合調整開口１９２、及び調整窪み１９３が形成されている領域よりも外側の領域である。同様に、第２の板状部材６２と第３の板状部材１８１とも、向かい合う面の縁部分がロウ付けされることで、固定されている。第２の板状部材６２とのロウ付けを行う上で第３の板状部材１８１の向かい合う面の縁部分とは、第３の板状部材１８１の分配調整開口１９１、集合調整開口１９２よりも外側の領域である。
　ヘッダ１４３は、分配を行う部分と集合を行う部分とが一体となっているため、第３の板状部材１８１の調整窪み１９３の全体が第１の板状部材６１に対向している。このため、第３の板状部材１８１は、調整窪み１９３によって伝熱管４１の往路と復路とを連通させ、流路を区画することができる。
　図７は、実施の形態２に係る室内熱交換器１１２を示す側視図である。図８は、実施の形態２に係る室内熱交換器１１２の断面図である。図９は、実施の形態２に係る室内熱交換器１１２の断面図である。図１０は、実施の形態２に係る室内熱交換器１１２の断面図である。図８は、図７の室内熱交換器１１２のヘッダ１４３をＡ－Ａ方向の断面で切断した場合の断面図である。図９は、図７の室内熱交換器１１２のヘッダ１４３をＢ－Ｂ方向の断面で切断した場合の断面図である。図１０は、図７の室内熱交換器１１２のヘッダ１４３をＣ－Ｃ方向の断面で切断した場合の断面図である。図８～図１０において、実線で示された矢印は、水の流れを示している。特に、図８及び図９において、同一の符号を付した矢印は、水の流れが連続していることを示している。
　ここで、図８～１０を用いて、室内熱交換器１１２における水の流れについて説明する。先ず、図８に示すように、流入管３１から流入した水は、流入口７２を通り、第２の板状部材６２の分配窪み７３に流れる。分配窪み７３に流れた水（Ｆ１～Ｆ８）は、第３の板状部材１８１の分配調整開口１９１、及び第１の板状部材６１の始端開口６７を通り、複数の伝熱管４１の往路に分配される。図９に示すように、伝熱管４１の往路を流れる水（Ｆ１～Ｆ８）は、ヘアピン部５３で折り返し、復路に流れる。下側の６本の伝熱管４１の復路を流れた水（Ｆ１～Ｆ６）は、第１の板状部材６１の終端開口６８、及び第３の板状部材１８１の集合調整開口１９２を通り、第２の板状部材６２の集合窪み７５に集合し、流出口７４を通って流出管３２に流出する。
　また、図８に示すように、上側の４本の伝熱管４１の復路を流れた水（Ｆ７及びＦ８）は、第１の板状部材６１の終端開口６８を通った後、調整窪み１９３で折り返す。図９に示すように、調整窪み１９３で折り返した水（Ｒ１及びＲ２）は、第１の板状部材６１の始端開口６７を通り、再び複数の伝熱管４１の往路を流れる。その後、伝熱管４１の往路を流れる水（Ｅ１及びＥ２）は、ヘアピン部５３で折り返し、復路に流れる。復路を流れた水（Ｅ１及びＥ２）は、第１の板状部材６１の終端開口６８、及び第３の板状部材１８１の集合調整開口１９２を通り、第２の板状部材６２の集合窪み７５に集合し、流出口７４を通って流出管３２に流出する。
　概して、流路の数を増やしすぎると、水の流速が過度に低下する。水の流速が過度に低下した場合、伝熱管４１と水に含まれる酸素との接触時間が増えるため、伝熱管４１が腐食する虞がある。実施の形態２では、室内熱交換器１１２は、第３の板状部材１８１を有する。よって、室内熱交換器１１２は、水の流速が過度に低下しないように、流路の数を減らすことができる。したがって、室内熱交換器１１２は、伝熱管４１が腐食することを抑制することができる。
　また、本実施の形態２の室内熱交換器１１２は、冷媒が流れる室内熱交換器を流用した上で、冷媒の代わりに水を用いるように変更する場合であっても、第３の板状部材１８１を設けるだけで流路の数を調整し、伝熱管４１の腐食を抑制することができる。
　また、本実施の形態２によれば、ヘッダ４３は、分配及び集合の両方の機能を有している。このため、分配を行う部分と集合を行う部分とが別体である場合と比較して、第１の板状部材６１と第３の板状部材１８１、及び第２の板状部材６２と第３の板状部材１８１とのロウ付け量が少ない。
　（実施の形態２の変形例１）
　実施の形態２の変形例１では、第２の板状部材６２及び第３の板状部材１８１は、樹脂からなる。第２の板状部材６２と第３の板状部材１８１とは、超音波等よって溶着される。第１の板状部材６１と第２の板状部材６２とは、間に第３の板状部材１８１を配置した状態でねじによって締結されている。このように、室内熱交換器１１２のヘッダ１４３は、ロウ付けを行う大型の装置を用いずに製造されている。
　以上が実施の形態における室内熱交換器の説明であるが、本開示の室内熱交換器は、実施の形態に開示された構成以外に種々の変更を行うことができる。
　例えば、実施の形態１の室内熱交換器１２は、ビル用マルチエアコンに使用される室内機１だけでなく、住宅の居室の壁面等に取り付けられ、筐体１１の正面から空気の吹出を行う室内機等に適用されてもよい。
　また、実施の形態１において、伝熱管４１の本数及び流路の数は１０本の場合を例にして説明していたが、伝熱管４１が水によって腐食しないように、水が適切な流速を維持していればよく、２本～９本、又は１１本以上であってもよい。また、伝熱管４１は、始端５１及び終端５２がヘッダ４３において３列以上並ぶように設けてもよい。
　また、ヘッダ４３は、分配を行う部分のみからなるものであってもよい。
　また、実施の形態２の第３の板状部材１８１における調整窪み１９３の形成箇所、及び数等も、水の流速を適切に維持するという観点から適宜調整されてもよい。更に、第３の板状部材１８１以外にも第１の板状部材６１と第２の板状部材６２との間に流路を区画する板状部材を有していてもよい。
　また、実施の形態２の変形例１では、第２の板状部材６２及び第３の板状部材１８１を樹脂製としていたが、実施の形態２の第２の板状部材６２又は第３の板状部材１８１の何れか１つを樹脂製としてもよい。更に、実施の形態１の第２の板状部材６２を樹脂製としてもよい。更に、上述したように、第３の板状部材１８１以外に第１の板状部材６１と第２の板状部材６２との間に設けられる板状部材を樹脂製としてもよい。
　１　室内機、１１　筐体、１２　室内熱交換器、１３　室内送風機、２１　ケーシング、２２　インナーカバー、３１　流入管、３２　流出管、４１　伝熱管、４２　フィン、４３　ヘッダ、５１　始端、５２　終端、５３　ヘアピン部、６１　第１の板状部材、６２　第２の板状部材、６５　第１挿入部、６６　第２挿入部、６７　始端開口、６８　終端開口、７２　流入口、７３　分配窪み、７４　流出口、７５　集合窪み、１１２　室内熱交換器、１８１　第３の板状部材、１９１　分配調整開口、１９２　集合調整開口、１９３　調整窪み。

Claims (8)

  1. 　内部に熱媒体の水が流れる流路を有する複数の伝熱管と、
    　熱源側に接続された流入管から流入した水を複数の前記伝熱管に分配するヘッダと、を備え、
    　前記ヘッダは、
    　複数の前記伝熱管の始端と連通する複数の始端開口を有する第１の板状部材と、
    　前記流入管から水が流入する流入口と、複数の前記始端開口に対向して形成され、前記流入口と連通する分配窪みと、を有し、前記第１の板状部材と接合された第２の板状部材と、を有する
    　室内熱交換器。
  2. 　前記ヘッダは、更に、複数の前記伝熱管から集合した水を熱源側に接続された流出管に流出させるものであり、
    　前記第１の板状部材は、複数の前記伝熱管の終端に連通する複数の終端開口を有し、
    　前記第２の板状部材は、前記流出管に水を流出する流出口と、複数の前記終端開口に対向して形成され、前記流出口と連通する集合窪みと、を有する
    　請求項１に記載の室内熱交換器。
  3. 　前記第１の板状部材と、前記第２の板状部材との間に設けられ、前記流路を区画する第３の板状部材を更に有する
    　請求項２に記載の室内熱交換器。
  4. 　前記第３の板状部材は、
    　複数の前記始端開口と、前記分配窪みと、を連通する複数の分配調整開口と、
    　複数の前記終端開口と、前記集合窪みと、を連通する複数の集合調整開口と、
    　前記始端開口と、前記終端開口と、を連通する調整窪みと、を有している
    　請求項３に記載の室内熱交換器。
  5. 　前記第１の板状部材、前記第２の板状部材、及び前記第３の板状部材は、耐脱亜鉛黄銅合金製である
    　請求項３又は４に記載の室内熱交換器。
  6. 　前記第１の板状部材は、耐脱亜鉛黄銅合金製であり、
    　前記第２の板状部材は、樹脂製であり、
    　前記第３の板状部材は、樹脂製である
    　請求項３又は４に記載の室内熱交換器。
  7. 　複数の前記伝熱管は、銅製である
    　請求項１～６の何れか１項に記載の室内熱交換器。
  8. 　請求項１～７の何れか１項に記載の室内熱交換器と、
    　前記室内熱交換器に室内空気を送り、複数の前記伝熱管の内部を流れる熱媒体である水と室内空気との熱交換を促す室内送風機と、を備える
    　空気調和機の室内機。
PCT/JP2020/042205 2020-11-12 2020-11-12 室内熱交換器、及び空気調和機の室内機 WO2022102040A1 (ja)

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DE112020007772.1T DE112020007772T5 (de) 2020-11-12 2020-11-12 Innen-Wärmetauscher und Inneneinheit einer Klimaanlage
US18/044,588 US20230332776A1 (en) 2020-11-12 2020-11-12 Indoor heat exchanger and indoor unit of air-conditioning apparatus
AU2020476620A AU2020476620B2 (en) 2020-11-12 2020-11-12 Indoor heat exchanger and indoor unit of air-conditioning apparatus

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JP7602164B1 (ja) 2023-09-29 2024-12-18 ダイキン工業株式会社 室内熱交換器及び空調室内機
JP7602165B1 (ja) 2023-09-29 2024-12-18 ダイキン工業株式会社 室内熱交換器

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* Cited by examiner, † Cited by third party
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JP2012013289A (ja) * 2010-06-30 2012-01-19 Mitsubishi Electric Corp 冷媒分配器及びこの冷媒分配器を用いたヒートポンプ装置
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
WO2020089966A1 (ja) * 2018-10-29 2020-05-07 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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JP5811134B2 (ja) 2013-04-30 2015-11-11 ダイキン工業株式会社 空気調和機の室内ユニット

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JP2012013289A (ja) * 2010-06-30 2012-01-19 Mitsubishi Electric Corp 冷媒分配器及びこの冷媒分配器を用いたヒートポンプ装置
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
WO2020089966A1 (ja) * 2018-10-29 2020-05-07 三菱電機株式会社 熱交換器及び冷凍サイクル装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7602164B1 (ja) 2023-09-29 2024-12-18 ダイキン工業株式会社 室内熱交換器及び空調室内機
JP7602165B1 (ja) 2023-09-29 2024-12-18 ダイキン工業株式会社 室内熱交換器

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