WO2021145036A1 - Method for manufacturing heat exchanger - Google Patents

Method for manufacturing heat exchanger Download PDF

Info

Publication number
WO2021145036A1
WO2021145036A1 PCT/JP2020/038863 JP2020038863W WO2021145036A1 WO 2021145036 A1 WO2021145036 A1 WO 2021145036A1 JP 2020038863 W JP2020038863 W JP 2020038863W WO 2021145036 A1 WO2021145036 A1 WO 2021145036A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
brazing
winding
refrigerant distributor
flat tubes
Prior art date
Application number
PCT/JP2020/038863
Other languages
French (fr)
Japanese (ja)
Inventor
暢洋 木下
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 JP2021570648A priority Critical patent/JP7186903B2/en
Publication of WO2021145036A1 publication Critical patent/WO2021145036A1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/14—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams
    • B23K1/18—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams circumferential seams, e.g. of shells
    • 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
    • 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

Definitions

  • This disclosure relates to a method of manufacturing a heat exchanger.
  • Patent Document 1 discloses a brazing member in which a plurality of insertion portions sandwiching a flat tube are connected by a connecting portion. That is, the brazing member of Patent Document 1 is collectively attached to a plurality of flat pipes inserted into the openings of the refrigerant distributor. Patent Document 1 is intended to improve the efficiency of brazing work in a heat exchanger in this way.
  • the portion of the connecting portion located substantially in the center of each insertion portion drops without joining the refrigerant distributor and the flat pipe. Therefore, a part of the brazing member is not used for joining the refrigerant distributor and the flat pipe, and is wasted. Further, since the connecting portion is omitted and one brazing member consisting of only the insertion portion is attached to each of the flat pipes, the entire amount is used for joining the refrigerant distributor and the flat pipe. In general, such a brazing member may be manufactured so as to have a U-shape that sandwiches a flat tube by bending a brazing member that has been linear.
  • the present disclosure has been made to solve the above-mentioned problems, and provides a method for manufacturing a heat exchanger that suppresses the occurrence of poor bonding between the refrigerant distributor and the flat pipe.
  • the method for manufacturing a heat exchanger is a method for manufacturing a heat exchanger including a plurality of flat tubes and a refrigerant distributor having a plurality of insertion openings into which the plurality of flat tubes are inserted.
  • a step of forming a winding portion by winding between a first end portion and a second end portion of a plurality of linear brazing members, and an end portion of a plurality of flat tubes are formed between the winding portion and the first portion.
  • the step of sandwiching the first sandwiching portion between the end portion of the pipe and the second sandwiching portion between the winding portion and the second end portion, and the end portions of the plurality of flat pipes are distributed as a refrigerant. It has a step of inserting into each of a plurality of insertion openings of the vessel, and a step of melting the plurality of brazing members and joining the plurality of flat pipes and the refrigerant distributor.
  • the brazing member is urged to sandwich the flat tube. Therefore, the brazing member is in contact with and fixed to the flat tube. Therefore, according to the method for manufacturing the heat exchanger of the present disclosure, since the brazing member is hard to come off from the flat tube during brazing, the occurrence of poor joining is suppressed.
  • FIG. It is a perspective view which shows the heat exchange part 34 which concerns on Embodiment 1.
  • FIG. It is a figure for demonstrating the flux application method which concerns on Embodiment 1.
  • FIG. It is a perspective view which shows the flat tube 33 and brazing member 50 which concerns on Embodiment 1.
  • FIG. It is a figure for demonstrating the connection method of the flat tube 33 and the refrigerant distributor 31 which concerns on Embodiment 1.
  • FIG. It is a side view which shows the flat tube 33, the brazing member 50, and the refrigerant distributor 31 which concerns on Embodiment 1.
  • FIG. It is a figure for demonstrating the joining method of the flat tube 33 and the refrigerant distributor 31 which concerns on Embodiment 1.
  • FIG. It is a figure for demonstrating the bending process of the heat exchange part 34 which concerns on Embodiment 1.
  • FIG. It is a perspective view which shows the outdoor heat exchanger 8 which concerns on Embodiment 1.
  • FIG. It is a flowchart which shows the manufacturing method of the outdoor heat exchanger 8 which concerns on Embodiment 2.
  • FIG. It is a side view of the brazing member 150 which concerns on Embodiment 2.
  • FIG. It is a perspective view of the brazing member 150 which concerns on Embodiment 2.
  • FIG. It is a figure for demonstrating the fixed state of the brazing member 150 which concerns on Embodiment 2.
  • FIG. It is a perspective view which shows the brazing member 250 which concerns on the modification 1 of Embodiment 1.
  • FIG. 2 It is a perspective view which shows the refrigerant distributor 331 which concerns on the modification 2 of Embodiment 1.
  • FIG. It is a figure for demonstrating the assembly of the flat tube 33 and the refrigerant distributor 31 which concerns on Embodiment 1.
  • FIG. It is a side view which shows the brazing member 450 which concerns on the modification 1 of Embodiment 2.
  • FIG. It is a perspective view which shows the brazing member 450 which concerns on the modification 1 of Embodiment 2.
  • FIG. 1 is a circuit diagram showing an air conditioner 1 according to the first embodiment.
  • the air conditioner 1 will be described with reference to FIG.
  • the air conditioner 1 has an outdoor unit 2, an indoor unit 3, and a refrigerant pipe 4.
  • one indoor unit 3 is illustrated in FIG. 1, the number of indoor units 3 may be two or more.
  • the outdoor unit 2 includes a compressor 6, a flow path switching device 7, an outdoor heat exchanger 8, an outdoor blower 9, an expansion unit 10, and a receiver 11.
  • the indoor unit 3 has an indoor heat exchanger 21 and an indoor blower 22.
  • the refrigerant pipe 4 connects the compressor 6, the flow path switching device 7, the outdoor heat exchanger 8, the expansion unit 10, the receiver 11, and the indoor heat exchanger 21.
  • the refrigerant pipe 4 and each device connected to the refrigerant pipe 4 constitute a refrigerant circuit 5.
  • the compressor 6 sucks in the refrigerant in a low temperature and low pressure state, compresses the sucked refrigerant into a refrigerant in a high temperature and high pressure state, and discharges the refrigerant.
  • the compressor 6 is, for example, an inverter compressor driven by a motor (not shown) whose frequency is controlled by an inverter (not shown).
  • the flow path switching device 7 switches the flow direction of the refrigerant in the refrigerant circuit 5, and is, for example, a four-way valve.
  • the flow path switching device 7 connects the discharge side of the compressor 6 and the outdoor heat exchanger 8 and the suction side of the compressor 6 and the indoor heat exchanger 21 during the cooling operation. Further, the flow path switching device 7 connects the discharge side of the compressor 6 and the indoor heat exchanger 21 and the suction side of the compressor 6 and the outdoor heat exchanger 8 during the heating operation. ..
  • the flow path switching device 7 may have the same function as the four-way valve by combining a plurality of two-way valves instead of the four-way valve.
  • the outdoor heat exchanger 8 exchanges heat between the refrigerant and the outdoor air, and is, for example, a fin-and-tube heat exchanger.
  • the outdoor heat exchanger 8 acts as a condenser during the cooling operation and as an evaporator during the heating operation.
  • the outdoor blower 9 is a device that sends outdoor air to the outdoor heat exchanger 8, for example, a propeller fan.
  • the expansion unit 10 is a pressure reducing valve or an expansion valve that decompresses and expands the refrigerant.
  • the receiver 11 has a substantially cylindrical shape, and is a container for storing excess refrigerant in the refrigerant circuit 5 that increases or decreases according to the load fluctuation of the air conditioner 1.
  • the receiver 11 may be provided not in the outdoor unit 2 but in the indoor unit 3, or may be provided in a device different from the outdoor unit 2 and the indoor unit 3.
  • the indoor heat exchanger 21 exchanges heat between the indoor air and the refrigerant.
  • the indoor heat exchanger 21 acts as an evaporator during the cooling operation and as a condenser during the heating operation.
  • the indoor blower 22 is a device that sends indoor air to the indoor heat exchanger 21, and is, for example, a cross flow fan.
  • the liquid-state refrigerant flows into the expansion unit 10 and is depressurized and expanded to become a low-temperature and low-pressure gas-liquid two-phase state refrigerant.
  • the gas-liquid two-phase state refrigerant flows into the indoor heat exchanger 21 that acts as an evaporator.
  • the refrigerant flowing into the indoor heat exchanger 21 exchanges heat with the indoor air sent by the indoor blower 22, evaporates and gasifies. At this time, in the indoor air passing through the evaporator, the gas phase portion is cooled. Further, about 1% to 2% of water vapor contained in the indoor air passing through the evaporator is condensed as the cooling progresses. The condensed water is discharged to the outside through a drain drain pipe (not shown). Therefore, the indoor air passing through the evaporator is cooled and becomes air having a small amount of water and low humidity. Cooling in the room is performed by blowing out the air having low humidity cooled in this way from the indoor unit 3. After that, the evaporated low-temperature and low-pressure gas-state refrigerant passes through the flow path switching device 7 and is sucked into the compressor 6.
  • Heating operation Next, the heating operation will be described.
  • the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state.
  • the high-temperature and high-pressure gas-state refrigerant discharged from the compressor 6 passes through the flow path switching device 7 and flows into the indoor heat exchanger 21 that acts as a condenser.
  • the refrigerant flowing into the indoor heat exchanger 21 exchanges heat with the indoor air sent by the indoor blower 22, condenses and liquefies. At that time, the indoor air is warmed and the indoor heating is performed.
  • the liquid-state refrigerant flows into the expansion unit 10 and is depressurized and expanded to become a low-temperature and low-pressure gas-liquid two-phase state refrigerant.
  • the gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 8 that acts as an evaporator.
  • the refrigerant flowing into the outdoor heat exchanger 8 exchanges heat with the outdoor air sent by the outdoor blower 9, evaporates and gasifies. After that, the evaporated low-temperature and low-pressure gas-state refrigerant passes through the flow path switching device 7 and is sucked into the compressor 6.
  • FIG. 2 is a perspective view showing the outdoor unit 2 according to the first embodiment.
  • FIG. 2 shows a state in which the housing of the outdoor unit 2 is removed.
  • FIG. 3 is a perspective view showing the outdoor heat exchanger 8 according to the first embodiment.
  • the outdoor heat exchanger 8 has an L-shape.
  • the outdoor heat exchanger 8 has a plurality of refrigerant distributors 31, a plurality of fins 32, and a plurality of flat pipes 33.
  • the flat tube 33 is inserted so as to be orthogonal to the plurality of fins 32. Note that FIG. 3 shows only a part of the fins 32.
  • the end portion of the flat pipe 33 is joined to the refrigerant distributor 31.
  • the fin 32 and the flat tube 33 may be referred to as a heat exchange unit 34.
  • the heat exchange portion 34 is bent and has a curved portion 61.
  • FIG. 4 is a cross-sectional view showing the refrigerant distributor 31 according to the first embodiment.
  • the refrigerant distributor 31 is configured by stacking a plurality of plate-shaped members.
  • An inflow pipe 41 is connected to one side of the refrigerant distributor 31.
  • the inflow pipe 41 is a pipe connected to the refrigerant pipe 4 to allow the refrigerant to flow into the refrigerant distributor 31.
  • a branch path 42 is formed in each plate-shaped member.
  • the branch path 42 is an opening that penetrates the plate-shaped member.
  • the branch passage 42 is formed more in the plate-shaped member on the opposite side of the inflow pipe 41 of the refrigerant distributor 31 than in the plate-shaped member on the inflow pipe 41 side of the refrigerant distributor 31.
  • FIG. 5 is a perspective view showing the refrigerant distributor 31 according to the first embodiment.
  • the refrigerant distributor 31 is formed with a plurality of insertion openings 43 arranged side by side on the opposite side of the inflow pipe 41.
  • the insertion opening 43 is an opening into which the end portion of the flat tube 33 is inserted.
  • the refrigerant distributor 31 and the flat pipe 33 are assembled by inserting the end portion of one flat pipe 33 into each insertion opening 43.
  • the refrigerant distributor 31 distributes the refrigerant to the respective flat pipes 33 inserted in parallel.
  • the fin 32 is a flat plate-shaped member.
  • the surface portions of the fins 32 face the refrigerant distributor 31 and are arranged in parallel with each other at regular intervals.
  • the fin 32 is made of, for example, aluminum.
  • the fins 32 increase the heat transfer area and promote heat exchange between the outdoor air and the refrigerant flowing inside the flat tube 33.
  • the fin 32 may have another shape such as a corrugated fin formed in a wavy shape.
  • FIG. 6 is a perspective view showing the flat tube 33 according to the first embodiment.
  • FIG. 6 shows the flat tube 33 before the bending process is performed.
  • the outdoor heat exchanger 8 has a plurality of flat tubes 33.
  • the flat tube 33 is made of, for example, aluminum.
  • the flat tube 33 has a long length in the X direction and a short length in the Y direction.
  • the flat tube 33 has a Z direction as a width direction, that is, a plate thickness direction.
  • a plurality of flow holes 51 are formed so as to penetrate from one end surface to the other end surface in the X direction and through which the refrigerant flows.
  • the plurality of distribution holes 51 are arranged in the Y direction.
  • the flat tube 33 has a first surface 52 connected to one end surface and the other end surface, and a second surface 53 which is the back surface of the first surface 52.
  • the flat tube 33 before bending is used as a reference for the X direction, the Y direction, and the Z direction.
  • FIG. 7 is a side view showing the brazing member 50 according to the first embodiment.
  • the brazing member 50 is fixed to the end of the flat pipe 33 and is used for joining the flat pipe 33 and the refrigerant distributor 31.
  • the brazing member 50 is a member extending from the first end 81 to the second end 82.
  • the brazing member 50 is a machined linear member, and a winding portion 70 wound around a winding shaft S is formed between a first end portion 81 and a second end portion 82.
  • the winding portion 70 includes four ring-shaped portions 71 arranged in the axial direction of the winding shaft S.
  • the ring-shaped portion 71 is a portion around which the brazing member 50 makes one round.
  • the brazing member 50 is wound four times between the first end portion 81 and the second end portion 82.
  • the winding start and winding end of each ring-shaped portion 71 are located below the apex of the winding portion 70.
  • the space on the first end 81 side of the apex of the winding portion 70 is set as the first region, and the apex of the winding portion 70 is set.
  • the rotation direction at the apex of the winding portion 70 has the first end 81 as the start point and the second end 82 as the end point. At that time, the direction is from the second region to the first region.
  • the portion from the apex of the winding portion 70 to the first end 81 and the portion from the apex of the winding portion 70 to the second end 82 It intersects the part.
  • the portion between the winding portion 70 and the first end portion 81 is referred to as a first sandwiching portion 83.
  • the portion between the winding portion 70 and the second end portion 82 is referred to as a second sandwiching portion 84.
  • the first sandwiching portion 83 and the second sandwiching portion 84 extend so as to have a twisting relationship with respect to the winding shaft S.
  • the brazing member 50 is formed so that the winding portion 70 is urged in the rewinding direction.
  • the winding portion 70 is brazed so that the first sandwiching portion 83 and the second sandwiching portion 84 are brought closer to each other by the urging force in the rewinding direction of the winding portion 70 in a state where no external force is applied. It is formed by winding a member 50.
  • the brazing member 50 is attached to the flat tube 33, the flat tube 33 can be sandwiched between the first sandwiching portion 83 and the second sandwiching portion 84.
  • FIG. 8 is a flowchart showing a manufacturing method of the outdoor heat exchanger 8 according to the first embodiment.
  • a method of manufacturing the outdoor heat exchanger 8 having the bent portion 61 will be described with reference to FIG.
  • processing is performed so that the winding portion 70 is formed on the brazing member 50 (S1).
  • the winding portion 70 is formed, for example, by winding the brazing member 50 around a round bar-shaped member having a predetermined diameter.
  • FIG. 9 is a perspective view showing the heat exchange unit 34 according to the first embodiment.
  • FIG. 9 shows a flat plate-shaped heat exchange section 34 before bending.
  • FIG. 10 is a diagram for explaining a method of applying the flux F according to the first embodiment.
  • a roller 90 and a flux coating device 91 are used for applying the flux F.
  • Flux F is a white powder that decomposes an oxide film formed on the surface of an aluminum material.
  • the flux coating device 91 injects the flux F.
  • the heat exchange unit 34 before bending shown in FIG. 9 is placed on the roller 90 and is carried below the flux coating device 91 by the roller 90. As a result, the flux F is applied to the entire heat exchange section 34. Flux F also adheres to the exposed portion of the flat tube 33.
  • FIG. 11 is a perspective view showing the flat tube 33 and the brazing member 50 according to the first embodiment. Here, a method of fixing the brazing member 50 to the flat tube 33 will be described.
  • the space between the first end portion 81 and the second end portion 82 of the brazing member 50 is temporarily widened, and the first end portion 81 is provided.
  • the flat tube 33 is located between the and the second end 82. Then, by releasing the brazing member 50, the space between the first end portion 81 and the second end portion 82 is narrowed, and as shown in FIG. 11, the brazing member 50 is attached to the end portion of the flat tube 33. It is fixed. At this time, a plurality of ring-shaped portions 71 are lined up in the X direction, that is, in the elongated direction of the flat tube 33.
  • FIG. 12 is a diagram for explaining a method of connecting the flat pipe 33 and the refrigerant distributor 31 according to the first embodiment.
  • FIG. 13 is a side view showing the flat pipe 33, the brazing member 50, and the refrigerant distributor 31 according to the first embodiment.
  • FIG. 13 is a view of the assembled flat pipe 33 and the refrigerant distributor 31 as viewed from the Z direction.
  • the ends of the plurality of flat tubes 33 are inserted into the plurality of insertion openings 43 of the refrigerant distributor 31.
  • the plurality of flat tubes 33 are inserted into the plurality of insertion openings 43 so that no gap is formed between the brazing member 50 and the refrigerant distributor 31.
  • the refrigerant distributor 31 and the plurality of flat pipes 33 are connected.
  • FIG. 14 is a diagram for explaining a method of joining the flat pipe 33 and the refrigerant distributor 31 according to the first embodiment.
  • a roller 90 and a brazing furnace 92 are used for joining the flat pipe 33 and the refrigerant distributor 31.
  • the brazing furnace 92 is set to a high temperature at which the inside of the furnace melts the brazing member 50.
  • the heat exchange unit 34 and the refrigerant distributor 31 are placed on the roller 90 and carried into the inside of the brazing furnace 92 to be heated.
  • the brazing member 50 is melted, and the flat pipe 33 and the refrigerant distributor 31 are joined.
  • the heat exchange unit 34 and the refrigerant distributor 31 are placed on the roller 90 so that the Y direction, that is, the direction in which the communication holes are lined up is the vertical direction. That is, the winding portion 70 is located above the first sandwiching portion 83 and the second sandwiching portion 84. As a result, the molten winding portion 70 hangs downward.
  • FIG. 15 is a diagram for explaining the bending process of the heat exchange unit 34 according to the first embodiment.
  • FIG. 16 is a perspective view showing the outdoor heat exchanger 8 according to the first embodiment.
  • a bending device 93 is used for bending the heat exchange unit 34.
  • the heat exchange unit 34 is first placed on the table 94 of the bending device 93.
  • the heat exchange portion 34 is bent by 90 ° by applying a force to the other end portion while one end portion is fixed to the fixing portion 95 of the bending device 93. That is, the heat exchange unit 34 has a shape bent from the X direction to the Z direction. In this way, the bent portion 61 is formed in the heat exchange portion 34.
  • the outdoor heat exchanger 8 is manufactured through the steps S1 to S6.
  • the brazing member 50 is urged so as to sandwich the flat tube 33. Therefore, the brazing member 50 is in contact with and fixed to the flat tube 33. Therefore, according to the method of manufacturing the outdoor heat exchanger 8 of the first embodiment, the brazing member 50 is hard to come off from the flat tube 33 at the time of brazing, so that the occurrence of poor joining is suppressed.
  • the winding portion 70 when the flat pipe 33 and the refrigerant distributor 31 are joined, the winding portion 70 is arranged so as to be above the first sandwiching portion 83 and the second sandwiching portion 84. Has been done. The upper part of the winding portion 70 is not in contact with the flat tube 33. However, when the brazing member 50 is melted, the winding portion 70 hangs down to a portion where the refrigerant distributor 31 and the flat pipe 33 are joined, and is used for joining the refrigerant distributor 31 and the flat pipe 33. .. That is, the winding portion 70 is used not only for sandwiching the flat pipe 33 between the first sandwiching portion 83 and the second sandwiching portion 84, but also for joining the refrigerant distributor 31 and the flat pipe 33. Therefore, according to the method of manufacturing the outdoor heat exchanger 8, it is possible to reduce the portion that is not used for joining the refrigerant distributor 31 and the flat pipe 33 and is wasted.
  • the winding portion 70 of the brazing member 50 has a plurality of ring-shaped portions 71 arranged in the X direction of the flat tube 33. Therefore, the portion where the brazing member 50 and the flat tube 33 come into contact with each other is larger than, for example, when the brazing member is U-shaped or when the ring-shaped portion is continuous in the Y direction. Therefore, since the brazing member 50 is stable when attached to the flat tube 33, it is difficult to fall off even when joining is performed in the brazing furnace 92.
  • FIG. 17 is a flowchart showing a manufacturing method of the outdoor heat exchanger 8 according to the second embodiment.
  • the second embodiment is different from the first embodiment in the processing method of the brazing member 150 and the procedure for fixing the brazing member 150 to the flat pipe 33.
  • the same parts as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and the differences from the first embodiment will be mainly described.
  • the ends of the plurality of flat tubes 33 are attached to the openings of the plurality of U-shaped brazing members 150 (S12), the first ends 181 and the second ends of the brazing members 150 are used.
  • the twisted portion 170 is formed by being twisted between the end portion 182 and the end portion 182.
  • the ends of the plurality of flat tubes 33 are the first sandwiching portion 183 between the twisted portion 170 and the first end portion 181 of the plurality of brazing members 150, and the twisted portions 170 and the second. It is sandwiched between the second sandwiching portion 184 and the end portion 182 of the (S13).
  • FIG. 18 is a side view of the brazing member 150 according to the second embodiment.
  • FIG. 19 is a perspective view of the brazing member 150 according to the second embodiment.
  • the brazing member 150 attached to the end of the flat tube 33 is twisted 180 ° at the top to form a twisted portion 170.
  • the twisted portion 170 is composed of one ring-shaped portion 171.
  • the ring-shaped portion 171 is a portion in which the brazing member 150 is half-twisted.
  • the twisting shaft T in FIGS. 18 and 19 is a rotation shaft of the twisted portion 170. Further, the twist shaft T extends in the Y direction, that is, in the direction in which the flow holes 51 are lined up.
  • the first sandwiching portion 183 and the second sandwiching portion 184 extend so as to be substantially parallel to the twist axis T.
  • FIG. 20 is a diagram for explaining a fixed state of the brazing member 150 according to the second embodiment.
  • the force applied to the twisted portion 170 propagates to the first sandwiched portion 183, so that the first sandwiched portion 183 is pressed against the first surface 52 of the flat tube 33 in the direction of arrow A.
  • the force applied to the twisting portion 170 propagates to the second sandwiching portion 184, so that the second sandwiching portion 184 is pressed against the second surface 53 of the flat tube 33 in the arrow B direction. That is, the brazing member 150 sandwiches the flat tube 33 between the first sandwiching portion 183 and the second sandwiching portion 184. As a result, the brazing member 150 comes into contact with and fixed to the flat tube 33.
  • steps S14 to S16 are performed in the same manner as in the first embodiment, detailed description thereof will be omitted. That is, following S13, a plurality of flat tubes 33 are assembled to the refrigerant distributor 31 (S14). Then, the brazing member 150 is melted in the brazing furnace 92, and the flat pipe 33 and the refrigerant distributor 31 are joined (S15). Finally, the heat exchanger 34 is bent to manufacture the outdoor heat exchanger 8 (S16).
  • the brazing member 150 is urged to sandwich the flat tube 33 by the manufacturing method of the outdoor heat exchanger 8 of the second embodiment. Therefore, the brazing member 150 is in contact with and fixed to the flat tube 33. Therefore, according to the method of manufacturing the outdoor heat exchanger 8 of the second embodiment, the brazing member 150 is hard to come off from the flat tube 33 at the time of brazing, so that the occurrence of poor joining is suppressed.
  • FIG. 21 is a perspective view showing the brazing member 250 according to the first modification of the first embodiment.
  • the winding portion 270 of the brazing member 250 is configured to include one ring-shaped portion 71. That is, the brazing member 250 is wound once.
  • the brazing member 250 according to the first modification of the first embodiment has the same appearance as the brazing member 250 in which the twisted portion 170 of the second embodiment is composed of one ring-shaped portion 71.
  • the number of ring-shaped portions 71 is appropriately adjusted from the amount of brazing members 250 required for joining the refrigerant distributor 31 and the flat pipe 33.
  • the lengths of the first sandwiching portion 83 and the second sandwiching portion 84, the wire diameter of the brazing member 250, and the like are also the brazing member 250 required for joining the refrigerant distributor 31 and the flat pipe 33. It is adjusted appropriately from the amount.
  • FIG. 22 is a perspective view showing the refrigerant distributor 331 according to the second modification of the first embodiment.
  • the insertion opening 343 of the refrigerant distributor 331 includes a long hole opening 397 and a circular opening 398.
  • the elongated hole opening 397 is an opening that is long in the Y direction when the flat tube 33 is inserted.
  • the circular opening 398 is connected to the elongated hole opening 397, has a diameter larger than the width of the elongated hole opening 397 in the lateral direction, and is a circular opening when viewed from the front. Further, the diameter of the circular opening 398 is larger than the width of the winding portion 70.
  • the insertion opening 343 of the second modification of the first embodiment may correspond to the brazing member 150 having the twisted portion 170 of the second embodiment.
  • FIG. 23 is a diagram for explaining the assembly of the flat pipe 33 and the refrigerant distributor 31 according to the first embodiment.
  • the order of the steps may be changed as appropriate.
  • the flat pipe 33 and the refrigerant distributor 31 may be assembled before the brazing member 50 is attached to the flat pipe 33.
  • the winding portion 70 may be formed at any time until the brazing member 50 is fixed to the flat tube 33.
  • the application of flux and the bending process of the heat exchange unit 34 may be omitted.
  • the winding portion 70 may be arranged so as to be below the first sandwiching portion 83 and the second sandwiching portion 84.
  • the brazing member 50 is urged to sandwich the flat tube 33. Therefore, the brazing member 50 is in contact with and fixed to the flat tube 33. Therefore, since the brazing member 50 is hard to come off from the flat tube 33 at the time of brazing, the occurrence of poor joining is suppressed.
  • brazing member 150 may be attached to the indoor heat exchanger 21 or another outdoor heat exchanger 8 instead of the outdoor heat exchanger 8. Further, the outdoor heat exchanger 8 to which the brazing member 150 is attached does not have to be used for the air conditioner 1.
  • FIG. 24 is a side view showing the brazing member 450 according to the first modification of the second embodiment.
  • FIG. 25 is a perspective view showing the brazing member 450 according to the first modification of the second embodiment.
  • the brazing member 450 of the first modification of the second embodiment is twisted by 360 °. That is, the twisted portion 470 has two ring-shaped portions 71.
  • the twisted portion 470 when the twisted portion 470 is twisted by 180 ° or more, the applied force becomes large. Therefore, the twisted portion 470 strongly presses the first sandwiching portion 83 against the first surface 52 of the flat tube 33, and the second sandwiching portion 84 strongly presses against the second surface 53 of the flat tube 33. Therefore, the brazing member 450 is strongly contacted and fixed to the flat tube 33, and the occurrence of poor joining is further suppressed.
  • FIG. 26 is a perspective view showing a brazing member 550 according to the second modification of the second embodiment. Further, as shown in FIG. 26, the brazing member 550 of the modified example 2 of the second embodiment is twisted by 720 °. That is, the twisted portion 570 has four ring-shaped portions 71. Therefore, according to the modified example 2 of the second embodiment, the brazing member 450 can be fixed more strongly than the modified example 1 of the second embodiment and the second embodiment.
  • the U-shaped brazing member 150 is attached to the flat tube 33 and then the twisted portion 170 is formed.
  • the brazing member 150 in which the twisted portion 170 is formed in advance is attached to the flat tube 33. It may be attached to.
  • the brazing member 150 is formed so as to be urged in the direction in which the twisted portion 170 is twisted.
  • a method of fixing the brazing member 150 in this case to the flat tube 33 will be described.
  • the brazing member 150 is fixed to the end of the flat tube 33.
  • brazing member 1 air conditioner, 2 outdoor unit, 3 indoor unit, 4 brazing pipe, 5 brazing circuit, 6 compressor, 7 flow path switching device, 8 outdoor heat exchanger, 9 outdoor blower, 10 expansion part, 11 receiver, 21 indoor Heat exchanger, 22 indoor blower, 31 refrigerant distributor, 32 fins, 33 flat pipe, 34 heat exchange part, 41 inflow pipe, 42 branch path, 43 insertion opening, 50 brazing member, 51 flow hole, 52 first Surface, 53, 2nd surface, 61, bent part, 70, wound part, 71, ring-shaped part, 81, 1st end, 82, 2nd end, 83, 1st pinch, 84, 2nd pinch, 90 Roller, 91 brazing device, 92 brazing furnace, 93 bending device, 94 table, 95 fixing part, 150 brazing member, 170 twisting part, 171 ring-shaped part, 181 first end, 182 second end, 183 1st pinch, 184 2nd pinch, 250 brazing member, 270 winding part, 331 refrigerant

Abstract

A method for manufacturing a heat exchanger that is provided with a plurality of flat tubes and a refrigerant distributor in which a plurality of insertion openings are formed, the plurality of flat tubes being inserted into said insertion openings, said method having: a step in which areas between first end sections and second end sections of a plurality of linear brazing members are respectively wound to form winding sections; a step in which end sections of the plurality of flat tubes are respectively clamped by first clamping sections that are between the winding sections and the first end sections and second clamping sections that are between the winding sections and the second end sections; a step in which the end sections of the plurality of flat tubes are respectively inserted into the plurality of insertion holes of the refrigerant distributor; and a step in which the plurality of brazing members are melted to bond the plurality of flat tubes and the refrigerant distributor.

Description

熱交換器の製造方法How to make a heat exchanger
　本開示は、熱交換器の製造方法に関する。 This disclosure relates to a method of manufacturing a heat exchanger.
　従来、熱交換器において、冷媒分配器と、冷媒分配器に形成された複数の開口のそれぞれに対応して挿入された扁平管とを接合させるロウ付け部材が知られている。このようなロウ付け部材は、扁平管の端部を扁平管の延びる方向と直交する方向に挟み込むことで、扁平管に固定されるものである。扁平管に固定されたロウ付け部材は、加熱されることで溶融し、冷媒分配器と扁平管とを接合させる。特許文献１には、扁平管を挟み込む挿入部が連結部によって複数連結されているロウ付け部材が開示されている。即ち、特許文献１のロウ付け部材は、冷媒分配器の開口に挿入された複数の扁平管に一括して取り付けられる。特許文献１は、このように、熱交換器におけるロウ付け作業の効率を高めようとするものである。 Conventionally, in a heat exchanger, a brazing member for joining a refrigerant distributor and a flat tube inserted corresponding to each of a plurality of openings formed in the refrigerant distributor is known. Such a brazing member is fixed to the flat tube by sandwiching the end portion of the flat tube in a direction orthogonal to the extending direction of the flat tube. The brazing member fixed to the flat pipe melts by being heated, and joins the refrigerant distributor and the flat pipe. Patent Document 1 discloses a brazing member in which a plurality of insertion portions sandwiching a flat tube are connected by a connecting portion. That is, the brazing member of Patent Document 1 is collectively attached to a plurality of flat pipes inserted into the openings of the refrigerant distributor. Patent Document 1 is intended to improve the efficiency of brazing work in a heat exchanger in this way.
特開２０１９－１４３８１６号公報Japanese Unexamined Patent Publication No. 2019-143816
　しかしながら、特許文献１に開示されたロウ付け部材は、連結部のうち、それぞれの挿入部の略中央に位置する部分が冷媒分配器と扁平管とを接合することなく滴下する。このため、ロウ付け部材の一部は、冷媒分配器と扁平管との接合に用いられず無駄になっている。また、連結部が省略され、挿入部のみからなるロウ付け部材は、扁平管のそれぞれに対して１つずつ取り付けられるため、全量が冷媒分配器と扁平管との接合に用いられる。概して、このようなロウ付け部材は、直線状であったロウ付け部材が折り曲げられることで、扁平管を挟み込むＵ字形状となるように製造されることがある。しかしながら、このようなロウ付け部材は、弾性力によって原形に復帰しようとするため、扁平管と接触し難い。したがって、このようなロウ付け部材は、熱交換器に適用された際に、冷媒分配器と扁平管との接合不良を発生させる虞があった。 However, in the brazing member disclosed in Patent Document 1, the portion of the connecting portion located substantially in the center of each insertion portion drops without joining the refrigerant distributor and the flat pipe. Therefore, a part of the brazing member is not used for joining the refrigerant distributor and the flat pipe, and is wasted. Further, since the connecting portion is omitted and one brazing member consisting of only the insertion portion is attached to each of the flat pipes, the entire amount is used for joining the refrigerant distributor and the flat pipe. In general, such a brazing member may be manufactured so as to have a U-shape that sandwiches a flat tube by bending a brazing member that has been linear. However, such a brazing member tends to return to its original shape by elastic force, so that it is difficult to come into contact with the flat tube. Therefore, when such a brazing member is applied to a heat exchanger, there is a risk of causing poor bonding between the refrigerant distributor and the flat pipe.
　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、冷媒分配器と扁平管との接合不良が発生することを抑制する熱交換器の製造方法を提供するものである。 The present disclosure has been made to solve the above-mentioned problems, and provides a method for manufacturing a heat exchanger that suppresses the occurrence of poor bonding between the refrigerant distributor and the flat pipe.
　本開示に係る熱交換器の製造方法は、複数の扁平管と、複数の扁平管が挿入される複数の挿入開口が形成された冷媒分配器とを備える熱交換器の製造方法であって、複数の線状のロウ付け部材の第１の端部と第２の端部との間を巻いて巻回部を形成するステップと、複数の扁平管の端部を、巻回部と第１の端部との間の第１の挟み部と、巻回部と第２の端部との間の第２の挟み部とでそれぞれ挟み込むステップと、複数の扁平管の端部を、冷媒分配器の複数の挿入開口にそれぞれ挿入するステップと、複数のロウ付け部材を溶融し、複数の扁平管と冷媒分配器とを接合するステップと、を有する。 The method for manufacturing a heat exchanger according to the present disclosure is a method for manufacturing a heat exchanger including a plurality of flat tubes and a refrigerant distributor having a plurality of insertion openings into which the plurality of flat tubes are inserted. A step of forming a winding portion by winding between a first end portion and a second end portion of a plurality of linear brazing members, and an end portion of a plurality of flat tubes are formed between the winding portion and the first portion. The step of sandwiching the first sandwiching portion between the end portion of the pipe and the second sandwiching portion between the winding portion and the second end portion, and the end portions of the plurality of flat pipes are distributed as a refrigerant. It has a step of inserting into each of a plurality of insertion openings of the vessel, and a step of melting the plurality of brazing members and joining the plurality of flat pipes and the refrigerant distributor.
　本開示の熱交換器の製造方法によれば、ロウ付け部材は、扁平管を挟み込むように付勢されている。このため、ロウ付け部材は、扁平管に接触して固定される。したがって、本開示の熱交換器の製造方法によれば、ロウ付けの際にロウ付け部材が扁平管から外れ難いため、接合不良の発生が抑制される。 According to the method of manufacturing the heat exchanger of the present disclosure, the brazing member is urged to sandwich the flat tube. Therefore, the brazing member is in contact with and fixed to the flat tube. Therefore, according to the method for manufacturing the heat exchanger of the present disclosure, since the brazing member is hard to come off from the flat tube during brazing, the occurrence of poor joining is suppressed.
実施の形態１に係る空気調和機１を示す回路図である。It is a circuit diagram which shows the air conditioner 1 which concerns on Embodiment 1. FIG. 実施の形態１に係る室外機２を示す斜視図である。It is a perspective view which shows the outdoor unit 2 which concerns on Embodiment 1. FIG. 実施の形態１に係る室外熱交換器８を示す斜視図である。It is a perspective view which shows the outdoor heat exchanger 8 which concerns on Embodiment 1. FIG. 実施の形態１に係る冷媒分配器３１を示す断面図である。It is sectional drawing which shows the refrigerant distributor 31 which concerns on Embodiment 1. FIG. 実施の形態１に係る冷媒分配器３１を示す斜視図である。It is a perspective view which shows the refrigerant distributor 31 which concerns on Embodiment 1. FIG. 実施の形態１に係る扁平管３３を示す斜視図である。It is a perspective view which shows the flat tube 33 which concerns on Embodiment 1. FIG. 実施の形態１に係るロウ付け部材５０を示す側面図である。It is a side view which shows the brazing member 50 which concerns on Embodiment 1. FIG. 実施の形態１に係る室外熱交換器８の製造方法を示すフローチャートである。It is a flowchart which shows the manufacturing method of the outdoor heat exchanger 8 which concerns on Embodiment 1. FIG. 実施の形態１に係る熱交換部３４を示す斜視図である。It is a perspective view which shows the heat exchange part 34 which concerns on Embodiment 1. FIG. 実施の形態１に係るフラックスの塗布方法について説明するための図である。It is a figure for demonstrating the flux application method which concerns on Embodiment 1. FIG. 実施の形態１に係る扁平管３３及びロウ付け部材５０を示す斜視図である。It is a perspective view which shows the flat tube 33 and brazing member 50 which concerns on Embodiment 1. FIG. 実施の形態１に係る扁平管３３と冷媒分配器３１との接続方法を説明するための図である。It is a figure for demonstrating the connection method of the flat tube 33 and the refrigerant distributor 31 which concerns on Embodiment 1. FIG. 実施の形態１に係る扁平管３３、ロウ付け部材５０、及び冷媒分配器３１を示す側視図である。It is a side view which shows the flat tube 33, the brazing member 50, and the refrigerant distributor 31 which concerns on Embodiment 1. FIG. 実施の形態１に係る扁平管３３と冷媒分配器３１との接合方法について説明するための図である。It is a figure for demonstrating the joining method of the flat tube 33 and the refrigerant distributor 31 which concerns on Embodiment 1. FIG. 実施の形態１に係る熱交換部３４の曲げ加工について説明するための図である。It is a figure for demonstrating the bending process of the heat exchange part 34 which concerns on Embodiment 1. FIG. 実施の形態１に係る室外熱交換器８を示す斜視図である。It is a perspective view which shows the outdoor heat exchanger 8 which concerns on Embodiment 1. FIG. 実施の形態２に係る室外熱交換器８の製造方法を示すフローチャートである。It is a flowchart which shows the manufacturing method of the outdoor heat exchanger 8 which concerns on Embodiment 2. FIG. 実施の形態２に係るロウ付け部材１５０の側視図である。It is a side view of the brazing member 150 which concerns on Embodiment 2. FIG. 実施の形態２に係るロウ付け部材１５０の斜視図である。It is a perspective view of the brazing member 150 which concerns on Embodiment 2. FIG. 実施の形態２に係るロウ付け部材１５０の固定状態を説明するための図である。It is a figure for demonstrating the fixed state of the brazing member 150 which concerns on Embodiment 2. FIG. 実施の形態１の変形例１に係るロウ付け部材２５０を示す斜視図である。It is a perspective view which shows the brazing member 250 which concerns on the modification 1 of Embodiment 1. FIG. 実施の形態１の変形例２に係る冷媒分配器３３１を示す斜視図である。It is a perspective view which shows the refrigerant distributor 331 which concerns on the modification 2 of Embodiment 1. FIG. 実施の形態１に係る扁平管３３と冷媒分配器３１との組付けを説明するための図である。It is a figure for demonstrating the assembly of the flat tube 33 and the refrigerant distributor 31 which concerns on Embodiment 1. FIG. 実施の形態２の変形例１に係るロウ付け部材４５０を示す側面図である。It is a side view which shows the brazing member 450 which concerns on the modification 1 of Embodiment 2. 実施の形態２の変形例１に係るロウ付け部材４５０を示す斜視図である。It is a perspective view which shows the brazing member 450 which concerns on the modification 1 of Embodiment 2. 実施の形態２の変形例２に係るロウ付け部材５５０を示す斜視図である。It is a perspective view which shows the brazing member 550 which concerns on the modification 2 of Embodiment 2.
実施の形態１．
　以下、室外熱交換器８の実施の形態について、図面を参照しながら説明する。図１は、実施の形態１に係る空気調和機１を示す回路図である。図１に基づいて、空気調和機１について説明する。図１に示すように、空気調和機１は、室外機２、室内機３及び冷媒配管４を有している。なお、図１では、１台の室内機３を例示しているが、室内機３の台数は、２台以上でもよい。 Embodiment 1.
Hereinafter, embodiments of the outdoor heat exchanger 8 will be described with reference to the drawings. FIG. 1 is a circuit diagram showing an air conditioner 1 according to the first embodiment. The air conditioner 1 will be described with reference to FIG. As shown in FIG. 1, the air conditioner 1 has an outdoor unit 2, an indoor unit 3, and a refrigerant pipe 4. Although one indoor unit 3 is illustrated in FIG. 1, the number of indoor units 3 may be two or more.
　室外機２は、圧縮機６、流路切替装置７、室外熱交換器８、室外送風機９、膨張部１０、及びレシーバ１１を有している。室内機３は、室内熱交換器２１及び室内送風機２２を有している。冷媒配管４は、圧縮機６、流路切替装置７、室外熱交換器８、膨張部１０、レシーバ１１及び室内熱交換器２１を接続している。冷媒配管４及び、冷媒配管４に接続された各機器は、冷媒回路５を構成している。 The outdoor unit 2 includes a compressor 6, a flow path switching device 7, an outdoor heat exchanger 8, an outdoor blower 9, an expansion unit 10, and a receiver 11. The indoor unit 3 has an indoor heat exchanger 21 and an indoor blower 22. The refrigerant pipe 4 connects the compressor 6, the flow path switching device 7, the outdoor heat exchanger 8, the expansion unit 10, the receiver 11, and the indoor heat exchanger 21. The refrigerant pipe 4 and each device connected to the refrigerant pipe 4 constitute a refrigerant circuit 5.
　圧縮機６は、低温且つ低圧の状態の冷媒を吸入し、吸入した冷媒を圧縮して高温且つ高圧の状態の冷媒にして吐出するものである。圧縮機６は、例えば、インバータ（図示せず）により周波数が制御されるモータ（図示せず）によって駆動されるインバータ圧縮機である。 The compressor 6 sucks in the refrigerant in a low temperature and low pressure state, compresses the sucked refrigerant into a refrigerant in a high temperature and high pressure state, and discharges the refrigerant. The compressor 6 is, for example, an inverter compressor driven by a motor (not shown) whose frequency is controlled by an inverter (not shown).
　流路切替装置７は、冷媒回路５において、冷媒の流通方向を切り替えるものであり、例えば四方弁である。流路切替装置７は、冷房運転時には、圧縮機６の吐出側と室外熱交換器８とを接続すると共に、圧縮機６の吸入側と室内熱交換器２１とを接続するものである。また、流路切替装置７は、暖房運転時には、圧縮機６の吐出側と室内熱交換器２１とを接続すると共に、圧縮機６の吸入側と室外熱交換器８とを接続するものである。なお、流路切替装置７は、四方弁ではなく、複数の二方弁などを組み合わせることで、四方弁と同様の機能を持たせたものであってもよい。 The flow path switching device 7 switches the flow direction of the refrigerant in the refrigerant circuit 5, and is, for example, a four-way valve. The flow path switching device 7 connects the discharge side of the compressor 6 and the outdoor heat exchanger 8 and the suction side of the compressor 6 and the indoor heat exchanger 21 during the cooling operation. Further, the flow path switching device 7 connects the discharge side of the compressor 6 and the indoor heat exchanger 21 and the suction side of the compressor 6 and the outdoor heat exchanger 8 during the heating operation. .. The flow path switching device 7 may have the same function as the four-way valve by combining a plurality of two-way valves instead of the four-way valve.
　室外熱交換器８は、冷媒と室外空気との間で熱交換を行うものであり、例えばフィンアンドチューブ型熱交換器である。室外熱交換器８は、冷房運転時には凝縮器として作用し、暖房運転時には蒸発器として作用する。 The outdoor heat exchanger 8 exchanges heat between the refrigerant and the outdoor air, and is, for example, a fin-and-tube heat exchanger. The outdoor heat exchanger 8 acts as a condenser during the cooling operation and as an evaporator during the heating operation.
　室外送風機９は、室外熱交換器８に室外空気を送る機器であり、例えば、プロペラファンである。膨張部１０は、冷媒を減圧して膨張させる減圧弁又は膨張弁である。 The outdoor blower 9 is a device that sends outdoor air to the outdoor heat exchanger 8, for example, a propeller fan. The expansion unit 10 is a pressure reducing valve or an expansion valve that decompresses and expands the refrigerant.
　レシーバ１１は、略円筒形をなしており、空気調和機１の負荷変動に応じて増減する冷媒回路５中の余剰冷媒を蓄える容器である。なお、レシーバ１１は、室外機２ではなく、室内機３に設けられたり、室外機２及び室内機３とは別の機器に設けられたりしてもよい。 The receiver 11 has a substantially cylindrical shape, and is a container for storing excess refrigerant in the refrigerant circuit 5 that increases or decreases according to the load fluctuation of the air conditioner 1. The receiver 11 may be provided not in the outdoor unit 2 but in the indoor unit 3, or may be provided in a device different from the outdoor unit 2 and the indoor unit 3.
　室内熱交換器２１は、室内空気と冷媒との間で熱交換を行うものである。室内熱交換器２１は、冷房運転時には蒸発器として作用し、暖房運転時には凝縮器として作用する。室内送風機２２は、室内熱交換器２１に室内空気を送る機器であり、例えば、クロスフローファンである。 The indoor heat exchanger 21 exchanges heat between the indoor air and the refrigerant. The indoor heat exchanger 21 acts as an evaporator during the cooling operation and as a condenser during the heating operation. The indoor blower 22 is a device that sends indoor air to the indoor heat exchanger 21, and is, for example, a cross flow fan.
　（冷房運転）
　ここで、空気調和機１の動作について説明する。先ず、冷房運転について説明する。冷房運転において、圧縮機６に吸入された冷媒は、圧縮機６によって圧縮されて高温且つ高圧のガス状態で吐出される。圧縮機６から吐出された高温且つ高圧のガス状態の冷媒は、流路切替装置７を通過して、凝縮器として作用する室外熱交換器８に流入する。室外熱交換器８に流入した冷媒は、室外送風機９によって送られる室外空気と熱交換されて凝縮し、液化する。液状態の冷媒は、膨張部１０に流入し、減圧及び膨張されて、低温且つ低圧の気液二相状態の冷媒となる。気液二相状態の冷媒は、蒸発器として作用する室内熱交換器２１に流入する。 (Cooling operation)
Here, the operation of the air conditioner 1 will be described. First, the cooling operation will be described. In the cooling operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high temperature and high pressure gas state. The high-temperature and high-pressure gas-state refrigerant discharged from the compressor 6 passes through the flow path switching device 7 and flows into the outdoor heat exchanger 8 acting as a condenser. The refrigerant flowing into the outdoor heat exchanger 8 exchanges heat with the outdoor air sent by the outdoor blower 9, condenses and liquefies. The liquid-state refrigerant flows into the expansion unit 10 and is depressurized and expanded to become a low-temperature and low-pressure gas-liquid two-phase state refrigerant. The gas-liquid two-phase state refrigerant flows into the indoor heat exchanger 21 that acts as an evaporator.
　室内熱交換器２１に流入した冷媒は、室内送風機２２によって送られる室内空気と熱交換されて蒸発し、ガス化する。この際、蒸発器を通過する室内空気において、気相の部分は、冷却される。また、蒸発器を通過する室内空気に含まれる１％～２％前後の水蒸気は、冷却が進むことで凝縮する。凝縮した水は、ドレン排水管（図示せず）を通じて室外に排出される。このため、蒸発器を通過する室内空気は、冷却され、水分量が少なく湿度の低い空気となる。このように冷却された湿度の低い空気が室内機３から吹き出されることで、室内における冷房が実施される。その後、蒸発した低温且つ低圧のガス状態の冷媒は、流路切替装置７を通過して、圧縮機６に吸入される。 The refrigerant flowing into the indoor heat exchanger 21 exchanges heat with the indoor air sent by the indoor blower 22, evaporates and gasifies. At this time, in the indoor air passing through the evaporator, the gas phase portion is cooled. Further, about 1% to 2% of water vapor contained in the indoor air passing through the evaporator is condensed as the cooling progresses. The condensed water is discharged to the outside through a drain drain pipe (not shown). Therefore, the indoor air passing through the evaporator is cooled and becomes air having a small amount of water and low humidity. Cooling in the room is performed by blowing out the air having low humidity cooled in this way from the indoor unit 3. After that, the evaporated low-temperature and low-pressure gas-state refrigerant passes through the flow path switching device 7 and is sucked into the compressor 6.
　（暖房運転）
　次に、暖房運転について説明する。暖房運転において、圧縮機６に吸入された冷媒は、圧縮機６によって圧縮されて高温且つ高圧のガス状態で吐出される。圧縮機６から吐出された高温且つ高圧のガス状態の冷媒は、流路切替装置７を通過して、凝縮器として作用する室内熱交換器２１に流入する。室内熱交換器２１に流入した冷媒は、室内送風機２２によって送られる室内空気と熱交換されて凝縮し、液化する。その際、室内空気が温められて、室内における暖房が実施される。液状態の冷媒は、膨張部１０に流入し、減圧及び膨張されて、低温且つ低圧の気液二相状態の冷媒となる。気液二相状態の冷媒は、蒸発器として作用する室外熱交換器８に流入する。室外熱交換器８に流入した冷媒は、室外送風機９によって送られる室外空気と熱交換されて蒸発し、ガス化する。その後、蒸発した低温且つ低圧のガス状態の冷媒は、流路切替装置７を通過して、圧縮機６に吸入される。 (Heating operation)
Next, the heating operation will be described. In the heating operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state. The high-temperature and high-pressure gas-state refrigerant discharged from the compressor 6 passes through the flow path switching device 7 and flows into the indoor heat exchanger 21 that acts as a condenser. The refrigerant flowing into the indoor heat exchanger 21 exchanges heat with the indoor air sent by the indoor blower 22, condenses and liquefies. At that time, the indoor air is warmed and the indoor heating is performed. The liquid-state refrigerant flows into the expansion unit 10 and is depressurized and expanded to become a low-temperature and low-pressure gas-liquid two-phase state refrigerant. The gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 8 that acts as an evaporator. The refrigerant flowing into the outdoor heat exchanger 8 exchanges heat with the outdoor air sent by the outdoor blower 9, evaporates and gasifies. After that, the evaporated low-temperature and low-pressure gas-state refrigerant passes through the flow path switching device 7 and is sucked into the compressor 6.
　続いて、室外熱交換器８の詳細について説明する。図２は、実施の形態１に係る室外機２を示す斜視図である。図２は、室外機２の筐体を取り外した状態を示している。図３は、実施の形態１に係る室外熱交換器８を示す斜視図である。図２および図３に示すように、室外熱交換器８は、Ｌ字形状を有している。また、図３に示すように、室外熱交換器８は、複数の冷媒分配器３１、複数のフィン３２、及び複数の扁平管３３を有している。扁平管３３は、複数のフィン３２に直交するように挿通されている。なお、図３では、一部のフィン３２のみを示している。また、扁平管３３の端部は、冷媒分配器３１に接合されている。なお、以下の説明において、フィン３２、及び扁平管３３を熱交換部３４と称することがある。熱交換部３４は、曲げ加工が施され、曲面形状の曲折部６１を有している。 Next, the details of the outdoor heat exchanger 8 will be described. FIG. 2 is a perspective view showing the outdoor unit 2 according to the first embodiment. FIG. 2 shows a state in which the housing of the outdoor unit 2 is removed. FIG. 3 is a perspective view showing the outdoor heat exchanger 8 according to the first embodiment. As shown in FIGS. 2 and 3, the outdoor heat exchanger 8 has an L-shape. Further, as shown in FIG. 3, the outdoor heat exchanger 8 has a plurality of refrigerant distributors 31, a plurality of fins 32, and a plurality of flat pipes 33. The flat tube 33 is inserted so as to be orthogonal to the plurality of fins 32. Note that FIG. 3 shows only a part of the fins 32. Further, the end portion of the flat pipe 33 is joined to the refrigerant distributor 31. In the following description, the fin 32 and the flat tube 33 may be referred to as a heat exchange unit 34. The heat exchange portion 34 is bent and has a curved portion 61.
　図４は、実施の形態１に係る冷媒分配器３１を示す断面図である。図４に示すように、冷媒分配器３１は、複数の板状部材が重ねられて構成されている。冷媒分配器３１は、一方に流入パイプ４１が接続されている。流入パイプ４１は、冷媒配管４に接続され、冷媒分配器３１に冷媒を流入させる管である。また、それぞれの板状部材には、分岐路４２が形成されている。分岐路４２は、板状部材を貫通する開口である。分岐路４２は、冷媒分配器３１の流入パイプ４１側の板状部材よりも、冷媒分配器３１の流入パイプ４１の反対側の板状部材に多く形成されている。これにより、冷媒分配器３１を流れる冷媒は、板状部材を経るごとに分岐して、挿入開口４３から流出する。 FIG. 4 is a cross-sectional view showing the refrigerant distributor 31 according to the first embodiment. As shown in FIG. 4, the refrigerant distributor 31 is configured by stacking a plurality of plate-shaped members. An inflow pipe 41 is connected to one side of the refrigerant distributor 31. The inflow pipe 41 is a pipe connected to the refrigerant pipe 4 to allow the refrigerant to flow into the refrigerant distributor 31. Further, a branch path 42 is formed in each plate-shaped member. The branch path 42 is an opening that penetrates the plate-shaped member. The branch passage 42 is formed more in the plate-shaped member on the opposite side of the inflow pipe 41 of the refrigerant distributor 31 than in the plate-shaped member on the inflow pipe 41 side of the refrigerant distributor 31. As a result, the refrigerant flowing through the refrigerant distributor 31 branches every time it passes through the plate-shaped member and flows out from the insertion opening 43.
　図５は、実施の形態１に係る冷媒分配器３１を示す斜視図である。図５に示すように、冷媒分配器３１には、流入パイプ４１の反対側において、複数の挿入開口４３が並んで形成されている。挿入開口４３は、扁平管３３の端部が挿入される開口である。それぞれの挿入開口４３に１つの扁平管３３の端部が挿入されることで、冷媒分配器３１と扁平管３３とが組付けられる。冷媒分配器３１は、並列して挿入されているそれぞれの扁平管３３に冷媒を分配する。 FIG. 5 is a perspective view showing the refrigerant distributor 31 according to the first embodiment. As shown in FIG. 5, the refrigerant distributor 31 is formed with a plurality of insertion openings 43 arranged side by side on the opposite side of the inflow pipe 41. The insertion opening 43 is an opening into which the end portion of the flat tube 33 is inserted. The refrigerant distributor 31 and the flat pipe 33 are assembled by inserting the end portion of one flat pipe 33 into each insertion opening 43. The refrigerant distributor 31 distributes the refrigerant to the respective flat pipes 33 inserted in parallel.
　フィン３２は、平板状の部材である。それぞれのフィン３２は、面部分が冷媒分配器３１に対向すると共に、互いに一定間隔を空けて並列に配置されている。フィン３２は、例えばアルミニウムからなる。フィン３２は、伝熱面積を増やし、室外空気と扁平管３３の内部を流れる冷媒との熱交換を促進する。なお、フィン３２は、波状に形成されたコルゲートフィン等のように他の形状からなるものであってもよい。 The fin 32 is a flat plate-shaped member. The surface portions of the fins 32 face the refrigerant distributor 31 and are arranged in parallel with each other at regular intervals. The fin 32 is made of, for example, aluminum. The fins 32 increase the heat transfer area and promote heat exchange between the outdoor air and the refrigerant flowing inside the flat tube 33. The fin 32 may have another shape such as a corrugated fin formed in a wavy shape.
　図６は、実施の形態１に係る扁平管３３を示す斜視図である。図６には、曲げ加工が行われる前の扁平管３３が示されている。室外熱交換器８は、複数の扁平管３３を有している。扁平管３３は、例えば、アルミニウムからなる。図６に示すように、扁平管３３は、Ｘ方向を長尺とし、Ｙ方向を短尺としている。また、扁平管３３は、Ｚ方向を幅方向、即ち、板厚方向としている。扁平管３３の内部には、一端面から他端面までをＸ方向に貫通し、冷媒が流れる流通孔５１が複数形成されている。複数の流通孔５１は、Ｙ方向に並んでいる。扁平管３３は、一端面及び他端面と接続する第１の面５２、及び第１の面５２の裏面である第２の面５３を有する。なお、Ｘ方向、Ｙ方向、及びＺ方向については、曲げ加工が行われる前の扁平管３３を基準としている。 FIG. 6 is a perspective view showing the flat tube 33 according to the first embodiment. FIG. 6 shows the flat tube 33 before the bending process is performed. The outdoor heat exchanger 8 has a plurality of flat tubes 33. The flat tube 33 is made of, for example, aluminum. As shown in FIG. 6, the flat tube 33 has a long length in the X direction and a short length in the Y direction. Further, the flat tube 33 has a Z direction as a width direction, that is, a plate thickness direction. Inside the flat tube 33, a plurality of flow holes 51 are formed so as to penetrate from one end surface to the other end surface in the X direction and through which the refrigerant flows. The plurality of distribution holes 51 are arranged in the Y direction. The flat tube 33 has a first surface 52 connected to one end surface and the other end surface, and a second surface 53 which is the back surface of the first surface 52. The flat tube 33 before bending is used as a reference for the X direction, the Y direction, and the Z direction.
　図７は、実施の形態１に係るロウ付け部材５０を示す側面図である。ロウ付け部材５０は、扁平管３３の端部に固定され、扁平管３３と冷媒分配器３１との接合に用いられるものである。ロウ付け部材５０は、第１の端部８１から第２の端部８２まで延びる部材である。ロウ付け部材５０は、線状の部材が加工されたものであり、第１の端部８１と第２の端部８２との間に、巻き軸Ｓを中心として巻かれた巻回部７０を有している。巻回部７０は、巻き軸Ｓの軸方向に並ぶ４つの輪状部７１からなる。輪状部７１は、ロウ付け部材５０が１周する部分である。即ち、ロウ付け部材５０は、第１の端部８１と第２の端部８２との間が４周巻かれている。それぞれの輪状部７１の巻き始めと巻き終わりとは、巻回部７０の頂点の下方に位置している。また、ロウ付け部材５０を巻回部７０の巻き軸方向から見た際において、巻回部７０の頂点よりも第１の端部８１側の空間を第１領域とし、巻回部７０の頂点よりも第２の端部８２側の空間を第２領域とした場合、巻回部７０の頂点における回転方向は、第１の端部８１を始点とし、第２の端部８２を終点とした際に、第２領域から第１領域に向かう方向である。 FIG. 7 is a side view showing the brazing member 50 according to the first embodiment. The brazing member 50 is fixed to the end of the flat pipe 33 and is used for joining the flat pipe 33 and the refrigerant distributor 31. The brazing member 50 is a member extending from the first end 81 to the second end 82. The brazing member 50 is a machined linear member, and a winding portion 70 wound around a winding shaft S is formed between a first end portion 81 and a second end portion 82. Have. The winding portion 70 includes four ring-shaped portions 71 arranged in the axial direction of the winding shaft S. The ring-shaped portion 71 is a portion around which the brazing member 50 makes one round. That is, the brazing member 50 is wound four times between the first end portion 81 and the second end portion 82. The winding start and winding end of each ring-shaped portion 71 are located below the apex of the winding portion 70. Further, when the brazing member 50 is viewed from the winding axis direction of the winding portion 70, the space on the first end 81 side of the apex of the winding portion 70 is set as the first region, and the apex of the winding portion 70 is set. When the space on the side of the second end 82 is set as the second region, the rotation direction at the apex of the winding portion 70 has the first end 81 as the start point and the second end 82 as the end point. At that time, the direction is from the second region to the first region.
　ロウ付け部材５０を巻き軸Ｓと平行な方向から見た場合に、巻回部７０の頂点から第１の端部８１までの部分と巻回部７０の頂点から第２の端部８２までの部分とは交差している。また、巻回部７０と第１の端部８１との間の部分を第１の挟み部８３と称する。更に、巻回部７０と第２の端部８２との間の部分を第２の挟み部８４と称する。第１の挟み部８３、及び第２の挟み部８４は、巻き軸Ｓに対して、ねじれの関係となるように延びている。ロウ付け部材５０は、巻回部７０が巻き戻る方向に付勢されるように形成されている。即ち、巻回部７０は、外部からの力が加えられない状態では、自身の巻き戻る方向への付勢力によって第１の挟み部８３と第２の挟み部８４とが近づくように、ロウ付け部材５０を巻いて形成されている。これにより、ロウ付け部材５０は、扁平管３３に取り付けられた際に、第１の挟み部８３と第２の挟み部８４とで扁平管３３を挟むことができる。 When the brazing member 50 is viewed from a direction parallel to the winding shaft S, the portion from the apex of the winding portion 70 to the first end 81 and the portion from the apex of the winding portion 70 to the second end 82 It intersects the part. Further, the portion between the winding portion 70 and the first end portion 81 is referred to as a first sandwiching portion 83. Further, the portion between the winding portion 70 and the second end portion 82 is referred to as a second sandwiching portion 84. The first sandwiching portion 83 and the second sandwiching portion 84 extend so as to have a twisting relationship with respect to the winding shaft S. The brazing member 50 is formed so that the winding portion 70 is urged in the rewinding direction. That is, the winding portion 70 is brazed so that the first sandwiching portion 83 and the second sandwiching portion 84 are brought closer to each other by the urging force in the rewinding direction of the winding portion 70 in a state where no external force is applied. It is formed by winding a member 50. As a result, when the brazing member 50 is attached to the flat tube 33, the flat tube 33 can be sandwiched between the first sandwiching portion 83 and the second sandwiching portion 84.
　（室外熱交換器８の製造方法）
　図８は、実施の形態１に係る室外熱交換器８の製造方法を示すフローチャートである。ここで、図８を用いて、曲折部６１を有する室外熱交換器８の製造方法について説明する。先ず、ロウ付け部材５０に巻回部７０が形成されるように加工を行う（Ｓ１）。巻回部７０は、例えば、所定の径を有する丸棒状の部材に対して、ロウ付け部材５０を巻きつけることで形成される。 (Manufacturing method of outdoor heat exchanger 8)
FIG. 8 is a flowchart showing a manufacturing method of the outdoor heat exchanger 8 according to the first embodiment. Here, a method of manufacturing the outdoor heat exchanger 8 having the bent portion 61 will be described with reference to FIG. First, processing is performed so that the winding portion 70 is formed on the brazing member 50 (S1). The winding portion 70 is formed, for example, by winding the brazing member 50 around a round bar-shaped member having a predetermined diameter.
　続いて、熱交換部３４の全体にフラックスＦが塗布される（Ｓ２）。図９は、実施の形態１に係る熱交換部３４を示す斜視図である。図９には、曲げ加工前の平板状の熱交換部３４が示されている。図１０は、実施の形態１に係るフラックスＦの塗布方法について説明するための図である。図１０に示すように、フラックスＦの塗布には、ローラー９０、及びフラックス塗布装置９１が用いられる。フラックスＦは、アルミ材の表面に形成されている酸化被膜を分解する白い粉である。フラックス塗布装置９１は、このフラックスＦを噴射するものである。図９に示された曲げ加工前の熱交換部３４は、ローラー９０の上に載置され、ローラー９０によってフラックス塗布装置９１の下方に運ばれる。これにより、熱交換部３４の全体にフラックスＦが塗布される。また、扁平管３３の露出部分にもフラックスＦが付着する。 Subsequently, the flux F is applied to the entire heat exchange section 34 (S2). FIG. 9 is a perspective view showing the heat exchange unit 34 according to the first embodiment. FIG. 9 shows a flat plate-shaped heat exchange section 34 before bending. FIG. 10 is a diagram for explaining a method of applying the flux F according to the first embodiment. As shown in FIG. 10, a roller 90 and a flux coating device 91 are used for applying the flux F. Flux F is a white powder that decomposes an oxide film formed on the surface of an aluminum material. The flux coating device 91 injects the flux F. The heat exchange unit 34 before bending shown in FIG. 9 is placed on the roller 90 and is carried below the flux coating device 91 by the roller 90. As a result, the flux F is applied to the entire heat exchange section 34. Flux F also adheres to the exposed portion of the flat tube 33.
　図８に戻って、熱交換部３４にフラックスＦが塗布される（Ｓ２）と、複数の扁平管３３の端部が、複数のロウ付け部材５０の第１の挟み部８３と第２の挟み部８４とでそれぞれ挟み込まれる（Ｓ３）。これにより、複数の扁平管３３の端部に、複数のロウ付け部材５０が１つずつ取り付けられる。図１１は、実施の形態１に係る扁平管３３及びロウ付け部材５０を示す斜視図である。ここで、ロウ付け部材５０を扁平管３３に固定する方法について説明する。巻回部７０を巻き込むようにロウ付け部材５０に力を加えることで、ロウ付け部材５０の第１の端部８１と第２の端部８２との間を一旦広げ、第１の端部８１と第２の端部８２との間に扁平管３３を位置させる。そして、ロウ付け部材５０を解放することで、第１の端部８１と第２の端部８２との間が狭まり、図１１に示すように、ロウ付け部材５０が扁平管３３の端部に固定される。この際に、複数の輪状部７１がＸ方向、即ち扁平管３３の長尺方向に沿って並んでいる。 Returning to FIG. 8, when the flux F is applied to the heat exchange portion 34 (S2), the ends of the plurality of flat tubes 33 are sandwiched between the first sandwiching portion 83 and the second sandwiching portion 83 of the plurality of brazing members 50. It is sandwiched between the portions 84 (S3). As a result, the plurality of brazing members 50 are attached to the ends of the plurality of flat tubes 33 one by one. FIG. 11 is a perspective view showing the flat tube 33 and the brazing member 50 according to the first embodiment. Here, a method of fixing the brazing member 50 to the flat tube 33 will be described. By applying a force to the brazing member 50 so as to involve the winding portion 70, the space between the first end portion 81 and the second end portion 82 of the brazing member 50 is temporarily widened, and the first end portion 81 is provided. The flat tube 33 is located between the and the second end 82. Then, by releasing the brazing member 50, the space between the first end portion 81 and the second end portion 82 is narrowed, and as shown in FIG. 11, the brazing member 50 is attached to the end portion of the flat tube 33. It is fixed. At this time, a plurality of ring-shaped portions 71 are lined up in the X direction, that is, in the elongated direction of the flat tube 33.
　図８に戻って、複数の扁平管３３の端部が、複数のロウ付け部材５０の第１の挟み部８３と第２の挟み部８４とでそれぞれ挟み込まれる（Ｓ３）と、複数の扁平管３３の端部が、冷媒分配器３１の複数の挿入開口４３に挿入される（Ｓ４）。ここで、挿入開口４３に挿入される扁平管３３の端部とは、ロウ付け部材５０が固定された位置よりも冷媒分配器３１側の挿入代である。図１２は、実施の形態１に係る扁平管３３と冷媒分配器３１との接続方法を説明するための図である。図１３は、実施の形態１に係る扁平管３３、ロウ付け部材５０、及び冷媒分配器３１を示す側視図である。図１３は、組付けられた扁平管３３、及び冷媒分配器３１をＺ方向から見た図である。図１２に示すように、複数の扁平管３３の端部を、冷媒分配器３１の複数の挿入開口４３に挿入する。この際に、図１３に示すように、複数の扁平管３３は、ロウ付け部材５０と冷媒分配器３１との間に隙間が生じないように、複数の挿入開口４３に挿入される。これにより、冷媒分配器３１と複数の扁平管３３とが接続される。 Returning to FIG. 8, when the ends of the plurality of flat tubes 33 are sandwiched between the first sandwiching portion 83 and the second sandwiching portion 84 of the plurality of brazing members 50 (S3), the plurality of flat tubes The end of 33 is inserted into the plurality of insertion openings 43 of the refrigerant distributor 31 (S4). Here, the end of the flat pipe 33 inserted into the insertion opening 43 is an insertion allowance on the refrigerant distributor 31 side of the position where the brazing member 50 is fixed. FIG. 12 is a diagram for explaining a method of connecting the flat pipe 33 and the refrigerant distributor 31 according to the first embodiment. FIG. 13 is a side view showing the flat pipe 33, the brazing member 50, and the refrigerant distributor 31 according to the first embodiment. FIG. 13 is a view of the assembled flat pipe 33 and the refrigerant distributor 31 as viewed from the Z direction. As shown in FIG. 12, the ends of the plurality of flat tubes 33 are inserted into the plurality of insertion openings 43 of the refrigerant distributor 31. At this time, as shown in FIG. 13, the plurality of flat tubes 33 are inserted into the plurality of insertion openings 43 so that no gap is formed between the brazing member 50 and the refrigerant distributor 31. As a result, the refrigerant distributor 31 and the plurality of flat pipes 33 are connected.
　図８に戻って、複数の扁平管３３の端部が、冷媒分配器３１の複数の挿入開口４３に挿入される（Ｓ４）と、扁平管３３と冷媒分配器３１とが接合される（Ｓ５）。図１４は、実施の形態１に係る扁平管３３と冷媒分配器３１との接合方法について説明するための図である。図１４に示すように、扁平管３３と冷媒分配器３１との接合には、ローラー９０、及びロウ付け炉９２が用いられる。ロウ付け炉９２は、炉内部がロウ付け部材５０を溶かす高温に設定されている。熱交換部３４、及び冷媒分配器３１は、ローラー９０の上に載置され、ロウ付け炉９２の炉内部に運ばれて加熱される。この際に、ロウ付け部材５０が溶融し、扁平管３３と冷媒分配器３１とが接合される。なお、熱交換部３４、及び冷媒分配器３１は、Ｙ方向、即ち連通穴の並ぶ方向が上下方向となるようにローラー９０に載置される。つまり、巻回部７０は、第１の挟み部８３、及び第２の挟み部８４の上側に位置している。これにより、溶融した巻回部７０は下方に垂れる。 Returning to FIG. 8, when the ends of the plurality of flat pipes 33 are inserted into the plurality of insertion openings 43 of the refrigerant distributor 31 (S4), the flat pipe 33 and the refrigerant distributor 31 are joined (S5). ). FIG. 14 is a diagram for explaining a method of joining the flat pipe 33 and the refrigerant distributor 31 according to the first embodiment. As shown in FIG. 14, a roller 90 and a brazing furnace 92 are used for joining the flat pipe 33 and the refrigerant distributor 31. The brazing furnace 92 is set to a high temperature at which the inside of the furnace melts the brazing member 50. The heat exchange unit 34 and the refrigerant distributor 31 are placed on the roller 90 and carried into the inside of the brazing furnace 92 to be heated. At this time, the brazing member 50 is melted, and the flat pipe 33 and the refrigerant distributor 31 are joined. The heat exchange unit 34 and the refrigerant distributor 31 are placed on the roller 90 so that the Y direction, that is, the direction in which the communication holes are lined up is the vertical direction. That is, the winding portion 70 is located above the first sandwiching portion 83 and the second sandwiching portion 84. As a result, the molten winding portion 70 hangs downward.
　図８に戻って、扁平管３３と冷媒分配器３１とが接合される（Ｓ５）と、熱交換部３４は、曲げ加工が行われる（Ｓ６）。図１５は、実施の形態１に係る熱交換部３４の曲げ加工について説明するための図である。図１６は、実施の形態１に係る室外熱交換器８を示す斜視図である。図１５に示すように、熱交換部３４の曲げ加工には、曲げ装置９３が用いられる。熱交換部３４は、先ず、曲げ装置９３のテーブル９４に載置される。そして、熱交換部３４は、曲げ装置９３の固定部９５に一方の端部が固定されたまま、他方の端部に力が加えられることで９０°曲げられる。つまり、熱交換部３４は、Ｘ方向からＺ方向に曲がった形状となる。このようにして、熱交換部３４に曲折部６１が形成される。以上のように、Ｓ１～Ｓ６の工程を経て、室外熱交換器８が製造される。 Returning to FIG. 8, when the flat pipe 33 and the refrigerant distributor 31 are joined (S5), the heat exchange unit 34 is bent (S6). FIG. 15 is a diagram for explaining the bending process of the heat exchange unit 34 according to the first embodiment. FIG. 16 is a perspective view showing the outdoor heat exchanger 8 according to the first embodiment. As shown in FIG. 15, a bending device 93 is used for bending the heat exchange unit 34. The heat exchange unit 34 is first placed on the table 94 of the bending device 93. Then, the heat exchange portion 34 is bent by 90 ° by applying a force to the other end portion while one end portion is fixed to the fixing portion 95 of the bending device 93. That is, the heat exchange unit 34 has a shape bent from the X direction to the Z direction. In this way, the bent portion 61 is formed in the heat exchange portion 34. As described above, the outdoor heat exchanger 8 is manufactured through the steps S1 to S6.
　実施の形態１の室外熱交換器８の製造方法によれば、ロウ付け部材５０は、扁平管３３を挟み込むように付勢されている。このため、ロウ付け部材５０は、扁平管３３に接触して固定される。したがって、実施の形態１の室外熱交換器８の製造方法によれば、ロウ付けの際にロウ付け部材５０が扁平管３３から外れ難いため、接合不良の発生が抑制される。 According to the manufacturing method of the outdoor heat exchanger 8 of the first embodiment, the brazing member 50 is urged so as to sandwich the flat tube 33. Therefore, the brazing member 50 is in contact with and fixed to the flat tube 33. Therefore, according to the method of manufacturing the outdoor heat exchanger 8 of the first embodiment, the brazing member 50 is hard to come off from the flat tube 33 at the time of brazing, so that the occurrence of poor joining is suppressed.
　また、実施の形態１によれば、扁平管３３と冷媒分配器３１とを接合する際に、巻回部７０が第１の挟み部８３及び第２の挟み部８４の上側となるように配置されている。巻回部７０は、上部が扁平管３３と接触していない。しかしながら、巻回部７０は、ロウ付け部材５０が溶融した際に、冷媒分配器３１と扁平管３３とが接合している部分まで垂れ、冷媒分配器３１と扁平管３３との接合に用いられる。即ち、巻回部７０は、第１の挟み部８３と第２の挟み部８４とで扁平管３３を挟み込ませるだけでなく、冷媒分配器３１と扁平管３３との接合にも用いられる。したがって、室外熱交換器８の製造方法によれば、冷媒分配器３１と扁平管３３との接合に用いられず無駄になる部分を削減することができる。 Further, according to the first embodiment, when the flat pipe 33 and the refrigerant distributor 31 are joined, the winding portion 70 is arranged so as to be above the first sandwiching portion 83 and the second sandwiching portion 84. Has been done. The upper part of the winding portion 70 is not in contact with the flat tube 33. However, when the brazing member 50 is melted, the winding portion 70 hangs down to a portion where the refrigerant distributor 31 and the flat pipe 33 are joined, and is used for joining the refrigerant distributor 31 and the flat pipe 33. .. That is, the winding portion 70 is used not only for sandwiching the flat pipe 33 between the first sandwiching portion 83 and the second sandwiching portion 84, but also for joining the refrigerant distributor 31 and the flat pipe 33. Therefore, according to the method of manufacturing the outdoor heat exchanger 8, it is possible to reduce the portion that is not used for joining the refrigerant distributor 31 and the flat pipe 33 and is wasted.
　また、実施の形態１によれば、ロウ付け部材５０の巻回部７０は、扁平管３３のＸ方向に並ぶ複数の輪状部７１を有している。このため、ロウ付け部材５０と扁平管３３とが接触する部分は、例えば、ロウ付け部材がＵ字形状である場合、又は輪状部がＹ方向に連続する場合等と比較して多くなる。よって、ロウ付け部材５０は、扁平管３３に取り付けた際に安定するため、ロウ付け炉９２で接合が行われる際も脱落し難い。 Further, according to the first embodiment, the winding portion 70 of the brazing member 50 has a plurality of ring-shaped portions 71 arranged in the X direction of the flat tube 33. Therefore, the portion where the brazing member 50 and the flat tube 33 come into contact with each other is larger than, for example, when the brazing member is U-shaped or when the ring-shaped portion is continuous in the Y direction. Therefore, since the brazing member 50 is stable when attached to the flat tube 33, it is difficult to fall off even when joining is performed in the brazing furnace 92.
実施の形態２．
　図１７は、実施の形態２に係る室外熱交換器８の製造方法を示すフローチャートである。本実施の形態２は、ロウ付け部材１５０の加工方法、及びロウ付け部材１５０を扁平管３３に固定する手順が実施の形態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号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。 Embodiment 2.
FIG. 17 is a flowchart showing a manufacturing method of the outdoor heat exchanger 8 according to the second embodiment. The second embodiment is different from the first embodiment in the processing method of the brazing member 150 and the procedure for fixing the brazing member 150 to the flat pipe 33. In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and the differences from the first embodiment will be mainly described.
　（室外熱交換器８の製造方法）
　実施の形態２に係る曲折部６１を有する室外熱交換器８の製造方法について説明する。図１７に示すように、先ず、熱交換部３４にフラックスＦが塗布される（Ｓ１１）。フラックスＦの塗布は、実施の形態１と同じ方法で行われるため、説明を省略する。次に、熱交換部３４にフラックスＦが塗布される（Ｓ１１）と、複数の扁平管の端部がそれぞれ、複数のＵ字状のロウ付け部材の開口部分に取り付けられる（Ｓ１２）。Ｕ字形状のロウ付け部材１５０は、第１の端部１８１から第２の端部１８２に延びている。即ち、扁平管３３は、ロウ付け部材１５０のＵ字形状の第１の端部１８１と第２の端部１８２との間に位置している。 (Manufacturing method of outdoor heat exchanger 8)
A method of manufacturing the outdoor heat exchanger 8 having the bent portion 61 according to the second embodiment will be described. As shown in FIG. 17, first, the flux F is applied to the heat exchange section 34 (S11). Since the application of the flux F is performed by the same method as in the first embodiment, the description thereof will be omitted. Next, when the flux F is applied to the heat exchange portion 34 (S11), the ends of the plurality of flat tubes are attached to the openings of the plurality of U-shaped brazing members (S12). The U-shaped brazing member 150 extends from the first end 181 to the second end 182. That is, the flat tube 33 is located between the U-shaped first end 181 and the second end 182 of the brazing member 150.
　続いて、複数の扁平管３３の端部がそれぞれ、複数のＵ字状のロウ付け部材１５０の開口部分に取り付けられる（Ｓ１２）と、ロウ付け部材１５０の第１の端部１８１と第２の端部１８２との間がねじられ、ねじり部１７０が形成される。これに伴い、複数の扁平管３３の端部は、複数のロウ付け部材１５０の、ねじり部１７０と第１の端部１８１との間の第１の挟み部１８３と、ねじり部１７０と第２の端部１８２との間の第２の挟み部１８４とでそれぞれ挟み込まれる（Ｓ１３）。 Subsequently, when the ends of the plurality of flat tubes 33 are attached to the openings of the plurality of U-shaped brazing members 150 (S12), the first ends 181 and the second ends of the brazing members 150 are used. The twisted portion 170 is formed by being twisted between the end portion 182 and the end portion 182. Along with this, the ends of the plurality of flat tubes 33 are the first sandwiching portion 183 between the twisted portion 170 and the first end portion 181 of the plurality of brazing members 150, and the twisted portions 170 and the second. It is sandwiched between the second sandwiching portion 184 and the end portion 182 of the (S13).
図１８は、実施の形態２に係るロウ付け部材１５０の側視図である。図１９は、実施の形態２に係るロウ付け部材１５０の斜視図である。図１８及び図１９に示すように、扁平管３３の端部に取り付けられたロウ付け部材１５０は、上部が１８０°ねじられ、ねじり部１７０が形成される。ねじり部１７０は、１つの輪状部１７１からなる。輪状部１７１は、ロウ付け部材１５０が半周ねじられた部分である。図１８及び図１９のねじり軸Ｔは、ねじり部１７０の回転軸である。また、ねじり軸Ｔは、Ｙ方向、即ち流通孔５１が並ぶ方向に延びている。第１の挟み部１８３、及び第２の挟み部１８４は、ねじり軸Ｔに対して、略平行となるように延びている。 FIG. 18 is a side view of the brazing member 150 according to the second embodiment. FIG. 19 is a perspective view of the brazing member 150 according to the second embodiment. As shown in FIGS. 18 and 19, the brazing member 150 attached to the end of the flat tube 33 is twisted 180 ° at the top to form a twisted portion 170. The twisted portion 170 is composed of one ring-shaped portion 171. The ring-shaped portion 171 is a portion in which the brazing member 150 is half-twisted. The twisting shaft T in FIGS. 18 and 19 is a rotation shaft of the twisted portion 170. Further, the twist shaft T extends in the Y direction, that is, in the direction in which the flow holes 51 are lined up. The first sandwiching portion 183 and the second sandwiching portion 184 extend so as to be substantially parallel to the twist axis T.
　図２０は、実施の形態２に係るロウ付け部材１５０の固定状態を説明するための図である。ねじり部１７０に加えられた力が第１の挟み部１８３に伝播することで、第１の挟み部１８３は、矢印Ａ方向に扁平管３３の第１の面５２に押し付けられる。また、ねじり部１７０に加えられた力が第２の挟み部１８４に伝播することで、第２の挟み部１８４は、矢印Ｂ方向に扁平管３３の第２の面５３に押し付けられる。つまり、ロウ付け部材１５０は、第１の挟み部１８３と第２の挟み部１８４とで扁平管３３を挟み込む。これにより、ロウ付け部材１５０は、扁平管３３に接触して固定される。 FIG. 20 is a diagram for explaining a fixed state of the brazing member 150 according to the second embodiment. The force applied to the twisted portion 170 propagates to the first sandwiched portion 183, so that the first sandwiched portion 183 is pressed against the first surface 52 of the flat tube 33 in the direction of arrow A. Further, the force applied to the twisting portion 170 propagates to the second sandwiching portion 184, so that the second sandwiching portion 184 is pressed against the second surface 53 of the flat tube 33 in the arrow B direction. That is, the brazing member 150 sandwiches the flat tube 33 between the first sandwiching portion 183 and the second sandwiching portion 184. As a result, the brazing member 150 comes into contact with and fixed to the flat tube 33.
　Ｓ１４～Ｓ１６の工程は、実施の形態１と同じ方法で行われるため、詳細な説明を省略する。即ち、Ｓ１３に続いて、冷媒分配器３１に複数の扁平管３３を組付ける（Ｓ１４）。そして、ロウ付け炉９２でロウ付け部材１５０を溶融し、扁平管３３と冷媒分配器３１とを接合する（Ｓ１５）。最後に、熱交換部３４が曲げ加工されることで、室外熱交換器８が製造される（Ｓ１６）。 Since the steps S14 to S16 are performed in the same manner as in the first embodiment, detailed description thereof will be omitted. That is, following S13, a plurality of flat tubes 33 are assembled to the refrigerant distributor 31 (S14). Then, the brazing member 150 is melted in the brazing furnace 92, and the flat pipe 33 and the refrigerant distributor 31 are joined (S15). Finally, the heat exchanger 34 is bent to manufacture the outdoor heat exchanger 8 (S16).
　実施の形態１と同様に、実施の形態２の室外熱交換器８の製造方法によっても、ロウ付け部材１５０は、扁平管３３を挟み込むように付勢されている。このため、ロウ付け部材１５０は、扁平管３３に接触して固定される。したがって、実施の形態２の室外熱交換器８の製造方法によれば、ロウ付けの際にロウ付け部材１５０が扁平管３３から外れ難いため、接合不良の発生が抑制される。 Similar to the first embodiment, the brazing member 150 is urged to sandwich the flat tube 33 by the manufacturing method of the outdoor heat exchanger 8 of the second embodiment. Therefore, the brazing member 150 is in contact with and fixed to the flat tube 33. Therefore, according to the method of manufacturing the outdoor heat exchanger 8 of the second embodiment, the brazing member 150 is hard to come off from the flat tube 33 at the time of brazing, so that the occurrence of poor joining is suppressed.
　以上が本開示の実施の形態の説明であるが、本開示は、上記の実施の形態の構成に限定されるものではなく、その技術的思想の範囲内で様々な変形又は組み合わせが可能である。 The above is the description of the embodiment of the present disclosure, but the present disclosure is not limited to the configuration of the above-described embodiment, and various modifications or combinations are possible within the scope of the technical idea thereof. ..
実施の形態１の変形例１．
　図２１は、実施の形態１の変形例１に係るロウ付け部材２５０を示す斜視図である。図２１に示すように、ロウ付け部材２５０の巻回部２７０は、１つの輪状部７１からなるように構成されている。即ち、ロウ付け部材２５０は、１周巻かれたものである。この場合、実施の形態１の変形例１に係るロウ付け部材２５０は、実施の形態２のねじり部１７０が１つの輪状部７１からなるロウ付け部材２５０と同等の外観を有する。また、輪状部７１の数は、冷媒分配器３１と扁平管３３との接合に要するロウ付け部材２５０の量から適宜調整される。その他にも、第１の挟み部８３及び第２の挟み部８４の長さ、及びロウ付け部材２５０の線径等も、冷媒分配器３１と扁平管３３との接合に要するロウ付け部材２５０の量から適宜調整される。 Modification example of the first embodiment 1.
FIG. 21 is a perspective view showing the brazing member 250 according to the first modification of the first embodiment. As shown in FIG. 21, the winding portion 270 of the brazing member 250 is configured to include one ring-shaped portion 71. That is, the brazing member 250 is wound once. In this case, the brazing member 250 according to the first modification of the first embodiment has the same appearance as the brazing member 250 in which the twisted portion 170 of the second embodiment is composed of one ring-shaped portion 71. Further, the number of ring-shaped portions 71 is appropriately adjusted from the amount of brazing members 250 required for joining the refrigerant distributor 31 and the flat pipe 33. In addition, the lengths of the first sandwiching portion 83 and the second sandwiching portion 84, the wire diameter of the brazing member 250, and the like are also the brazing member 250 required for joining the refrigerant distributor 31 and the flat pipe 33. It is adjusted appropriately from the amount.
実施の形態１の変形例２．
　図２２は、実施の形態１の変形例２に係る冷媒分配器３３１を示す斜視図である。図２２に示すように、冷媒分配器３３１の挿入開口３４３は、長孔開口３９７及び円開口３９８からなる。長孔開口３９７は、扁平管３３が挿入された際のＹ方向に長い開口である。円開口３９８は、長孔開口３９７に接続し、径が長孔開口３９７の短手方向の幅よりも大きく、正面視において、円形の開口である。また、円開口３９８の径は、巻回部７０の幅よりも大きい。円開口３９８には、巻回部７０の一部の輪状部７１が収められる。これにより、冷媒分配器３３１とロウ付け部材１５０とが密着し易くなり、冷媒分配器３３１と扁平管３３との接合をより強固に行うことができる。もっとも、実施の形態１の変形例２の挿入開口３４３は、実施の形態２のねじり部１７０を有するロウ付け部材１５０に対応するものであってもよい。 Modification example of the first embodiment 2.
FIG. 22 is a perspective view showing the refrigerant distributor 331 according to the second modification of the first embodiment. As shown in FIG. 22, the insertion opening 343 of the refrigerant distributor 331 includes a long hole opening 397 and a circular opening 398. The elongated hole opening 397 is an opening that is long in the Y direction when the flat tube 33 is inserted. The circular opening 398 is connected to the elongated hole opening 397, has a diameter larger than the width of the elongated hole opening 397 in the lateral direction, and is a circular opening when viewed from the front. Further, the diameter of the circular opening 398 is larger than the width of the winding portion 70. A part of the ring-shaped portion 71 of the winding portion 70 is housed in the circular opening 398. As a result, the refrigerant distributor 331 and the brazing member 150 can be easily brought into close contact with each other, and the refrigerant distributor 331 and the flat pipe 33 can be joined more firmly. However, the insertion opening 343 of the second modification of the first embodiment may correspond to the brazing member 150 having the twisted portion 170 of the second embodiment.
　図２３は、実施の形態１に係る扁平管３３と冷媒分配器３１との組付けを説明するための図である。室外熱交換器８の製造方法は、適宜、ステップの順番を変更するようにしてもよい。例えば、図２１に示すように、扁平管３３にロウ付け部材５０を取り付ける前に、扁平管３３と冷媒分配器３１との組付けを行ってもよい。また、巻回部７０の形成は、扁平管３３にロウ付け部材５０を固定するまでの任意の時点で行われればよい。また、フラックスの塗布、及び熱交換部３４の曲げ加工は、省略されてもよい。 FIG. 23 is a diagram for explaining the assembly of the flat pipe 33 and the refrigerant distributor 31 according to the first embodiment. In the method of manufacturing the outdoor heat exchanger 8, the order of the steps may be changed as appropriate. For example, as shown in FIG. 21, the flat pipe 33 and the refrigerant distributor 31 may be assembled before the brazing member 50 is attached to the flat pipe 33. Further, the winding portion 70 may be formed at any time until the brazing member 50 is fixed to the flat tube 33. Further, the application of flux and the bending process of the heat exchange unit 34 may be omitted.
　また、扁平管３３と冷媒分配器３１とを接合するステップにおいて、巻回部７０が、第１の挟み部８３及び第２の挟み部８４の下側となるように配置されていてもよい。この場合も、ロウ付け部材５０は、扁平管３３を挟み込むように付勢されている。このため、ロウ付け部材５０は、扁平管３３に接触して固定される。したがって、ロウ付けの際にロウ付け部材５０が扁平管３３から外れ難いため、接合不良の発生が抑制される。 Further, in the step of joining the flat pipe 33 and the refrigerant distributor 31, the winding portion 70 may be arranged so as to be below the first sandwiching portion 83 and the second sandwiching portion 84. In this case as well, the brazing member 50 is urged to sandwich the flat tube 33. Therefore, the brazing member 50 is in contact with and fixed to the flat tube 33. Therefore, since the brazing member 50 is hard to come off from the flat tube 33 at the time of brazing, the occurrence of poor joining is suppressed.
　また、ロウ付け部材１５０は、室外熱交換器８ではなく、室内熱交換器２１又は他の室外熱交換器８に取り付けられてもよい。更に、ロウ付け部材１５０が取り付けられる室外熱交換器８は、空気調和機１に用いられるものでなくてもよい。 Further, the brazing member 150 may be attached to the indoor heat exchanger 21 or another outdoor heat exchanger 8 instead of the outdoor heat exchanger 8. Further, the outdoor heat exchanger 8 to which the brazing member 150 is attached does not have to be used for the air conditioner 1.
実施の形態２の変形例１．
　図２４は、実施の形態２の変形例１に係るロウ付け部材４５０を示す側面図である。図２５は、実施の形態２の変形例１に係るロウ付け部材４５０を示す斜視図である。図２４及び図２５に示すように、実施の形態２の変形例１のロウ付け部材４５０は、３６０°ねじられている。即ち、ねじり部４７０は、２つの輪状部７１を有している。 Modification example of the second embodiment 1.
FIG. 24 is a side view showing the brazing member 450 according to the first modification of the second embodiment. FIG. 25 is a perspective view showing the brazing member 450 according to the first modification of the second embodiment. As shown in FIGS. 24 and 25, the brazing member 450 of the first modification of the second embodiment is twisted by 360 °. That is, the twisted portion 470 has two ring-shaped portions 71.
　このように、ねじり部４７０は、１８０°以上ねじられることで、加えられる力が大きくなる。このため、ねじり部４７０は、第１の挟み部８３を扁平管３３の第１の面５２に強く押し付け、第２の挟み部８４を扁平管３３の第２の面５３に強く押し付ける。したがって、ロウ付け部材４５０が扁平管３３に強く接触して固定され、接合不良が発生することが更に抑制されている。 In this way, when the twisted portion 470 is twisted by 180 ° or more, the applied force becomes large. Therefore, the twisted portion 470 strongly presses the first sandwiching portion 83 against the first surface 52 of the flat tube 33, and the second sandwiching portion 84 strongly presses against the second surface 53 of the flat tube 33. Therefore, the brazing member 450 is strongly contacted and fixed to the flat tube 33, and the occurrence of poor joining is further suppressed.
実施の形態２の変形例２．
　図２６は、実施の形態２の変形例２に係るロウ付け部材５５０を示す斜視図である。また、図２６に示すように、実施の形態２の変形例２のロウ付け部材５５０は、７２０°ねじられている。即ち、ねじり部５７０は、４つの輪状部７１を有している。このため、実施の形態２の変形例２によれば、実施の形態２、及び実施の形態２の変形例１よりも更に強くロウ付け部材４５０を固定することができる。 Modification example of the second embodiment 2.
FIG. 26 is a perspective view showing a brazing member 550 according to the second modification of the second embodiment. Further, as shown in FIG. 26, the brazing member 550 of the modified example 2 of the second embodiment is twisted by 720 °. That is, the twisted portion 570 has four ring-shaped portions 71. Therefore, according to the modified example 2 of the second embodiment, the brazing member 450 can be fixed more strongly than the modified example 1 of the second embodiment and the second embodiment.
　また、実施の形態２では、Ｕ字状のロウ付け部材１５０を扁平管３３に取り付けた後、ねじり部１７０を形成していたが、予めねじり部１７０を形成したロウ付け部材１５０を扁平管３３に取り付けるようにしてもよい。この場合、ロウ付け部材１５０は、ねじり部１７０がねじり込まれる方向に付勢されるように形成されている。 Further, in the second embodiment, the U-shaped brazing member 150 is attached to the flat tube 33 and then the twisted portion 170 is formed. However, the brazing member 150 in which the twisted portion 170 is formed in advance is attached to the flat tube 33. It may be attached to. In this case, the brazing member 150 is formed so as to be urged in the direction in which the twisted portion 170 is twisted.
　この場合のロウ付け部材１５０を扁平管３３に固定する方法について説明する。先ず、ねじり部１７０が解消するように、ロウ付け部材１５０に力を加えることで、ロウ付け部材１５０の第１の端部８１と第２の端部８２との間を一旦広げ、第１の端部８１と第２の端部８２との間に扁平管３３を位置させる。ロウ付け部材１５０の第１の端部８１と第２の端部８２との間を一旦広げる、そして、ロウ付け部材１５０を解放することで、第１の端部８１と第２の端部８２との間が狭まり、ロウ付け部材１５０が扁平管３３の端部に固定される。 A method of fixing the brazing member 150 in this case to the flat tube 33 will be described. First, by applying a force to the brazing member 150 so that the twisted portion 170 is eliminated, the space between the first end portion 81 and the second end portion 82 of the brazing member 150 is temporarily widened, and the first The flat tube 33 is located between the end 81 and the second end 82. By temporarily widening the space between the first end 81 and the second end 82 of the brazing member 150 and then releasing the brazing member 150, the first end 81 and the second end 82 are released. The brazing member 150 is fixed to the end of the flat tube 33.
　１　空気調和機、２　室外機、３　室内機、４　冷媒配管、５　冷媒回路、６　圧縮機、７　流路切替装置、８　室外熱交換器、９　室外送風機、１０　膨張部、１１　レシーバ、２１　室内熱交換器、２２　室内送風機、３１　冷媒分配器、３２　フィン、３３　扁平管、３４　熱交換部、４１　流入パイプ、４２　分岐路、４３　挿入開口、５０　ロウ付け部材、５１　流通孔、５２　第１の面、５３　第２の面、６１　曲折部、７０　巻回部、７１　輪状部、８１　第１の端部、８２　第２の端部、８３　第１の挟み部、８４　第２の挟み部、９０　ローラー、９１　フラックス塗布装置、９２　ロウ付け炉、９３　曲げ装置、９４　テーブル、９５　固定部、１５０　ロウ付け部材、１７０　ねじり部、１７１　輪状部、１８１　第１の端部、１８２　第２の端部、１８３　第１の挟み部、１８４　第２の挟み部、２５０　ロウ付け部材、２７０　巻回部、３３１　冷媒分配器、３４３　挿入開口、３９７　長孔開口、３９８　円開口、４５０　ロウ付け部材、４７０　ねじり部、５５０　ロウ付け部材、５７０　ねじり部。 1 air conditioner, 2 outdoor unit, 3 indoor unit, 4 brazing pipe, 5 brazing circuit, 6 compressor, 7 flow path switching device, 8 outdoor heat exchanger, 9 outdoor blower, 10 expansion part, 11 receiver, 21 indoor Heat exchanger, 22 indoor blower, 31 refrigerant distributor, 32 fins, 33 flat pipe, 34 heat exchange part, 41 inflow pipe, 42 branch path, 43 insertion opening, 50 brazing member, 51 flow hole, 52 first Surface, 53, 2nd surface, 61, bent part, 70, wound part, 71, ring-shaped part, 81, 1st end, 82, 2nd end, 83, 1st pinch, 84, 2nd pinch, 90 Roller, 91 brazing device, 92 brazing furnace, 93 bending device, 94 table, 95 fixing part, 150 brazing member, 170 twisting part, 171 ring-shaped part, 181 first end, 182 second end, 183 1st pinch, 184 2nd pinch, 250 brazing member, 270 winding part, 331 refrigerant distributor, 343 insertion opening, 397 long hole opening, 398 circular opening, 450 brazing member, 470 twisting part 550 brazing member, 570 twisted part.

Claims (8)

  1. 　複数の扁平管と、複数の前記扁平管が挿入される複数の挿入開口が形成された冷媒分配器とを備える熱交換器の製造方法であって、
    　複数の線状のロウ付け部材の第１の端部と第２の端部との間を巻いて巻回部を形成するステップと、
    　複数の前記扁平管の前記端部を、前記巻回部と前記第１の端部との間の第１の挟み部と、前記巻回部と前記第２の端部との間の第２の挟み部とでそれぞれ挟み込むステップと、
    　複数の前記扁平管の端部を、前記冷媒分配器の複数の前記挿入開口にそれぞれ挿入するステップと、
    　複数の前記ロウ付け部材を溶融し、複数の前記扁平管と前記冷媒分配器とを接合するステップと、を有する
    　熱交換器の製造方法。     A method for manufacturing a heat exchanger including a plurality of flat tubes and a refrigerant distributor having a plurality of insertion openings into which the plurality of flat tubes are inserted.
    A step of winding between the first end and the second end of a plurality of linear brazing members to form a wound portion, and
    The ends of the plurality of flat tubes are held in a first sandwiching portion between the winding portion and the first end portion, and a second sandwiching portion between the winding portion and the second end portion. Steps to sandwich each with the sandwiching part of
    A step of inserting the ends of the plurality of flat tubes into the plurality of insertion openings of the refrigerant distributor, respectively.
    A method for manufacturing a heat exchanger, comprising a step of melting a plurality of the brazing members and joining the plurality of the flat tubes and the refrigerant distributor.
  2. 　前記巻回部を形成するステップにおいて、前記巻回部は、前記第１の挟み部と前記第２の挟み部とが近づくように前記ロウ付け部材を巻いて形成されている
    　請求項１に記載の熱交換器の製造方法。     The first aspect of claim 1, wherein in the step of forming the winding portion, the winding member is wound so that the first sandwiching portion and the second sandwiching portion come close to each other. How to make a heat exchanger.
  3. 　前記ロウ付け部材を前記巻回部の巻き軸方向から見た際において、前記巻回部の頂点よりも前記第１の端部側の空間を第１領域と定め、前記巻回部の前記頂点よりも前記第２の端部側の空間を第２領域と定めた場合、前記巻回部の前記頂点における回転方向は、前記第１の端部を始点とし、前記第２の端部を終点とした際に、前記第２領域から前記第１領域に向かう方向である
    　請求項１又は２に記載の熱交換器の製造方法。     When the brazing member is viewed from the winding axis direction of the winding portion, the space on the first end side of the apex of the winding portion is defined as the first region, and the apex of the winding portion is defined as the first region. When the space on the side of the second end is defined as the second region, the rotation direction at the apex of the winding portion starts from the first end and ends at the second end. The method for manufacturing a heat exchanger according to claim 1 or 2, wherein the direction is from the second region to the first region.
  4. 　前記巻回部を形成するステップにおいて、前記ロウ付け部材を、前記巻回部の巻き軸方向から見た場合に、前記ロウ付け部材の前記巻回部の頂点から前記第１の端部までの部分と、前記ロウ付け部材の前記巻回部の頂点から前記第２の端部までの部分とを交差させる
    　請求項１～３の何れか１項に記載の熱交換器の製造方法。     In the step of forming the winding portion, when the brazing member is viewed from the winding axis direction of the winding portion, the brazing member is from the apex of the winding portion to the first end portion. The method for manufacturing a heat exchanger according to any one of claims 1 to 3, wherein the portion and a portion of the brazing member from the apex of the winding portion to the second end portion intersect.
  5. 　複数の扁平管と、複数の前記扁平管が挿入される複数の挿入開口が形成された冷媒分配器とを備える熱交換器の製造方法であって、
    　複数の前記扁平管の端部を、前記冷媒分配器の複数の前記挿入開口にそれぞれ挿入するステップと、
    　複数の前記扁平管の前記端部に複数のＵ字状のロウ付け部材をそれぞれ取り付けるステップと、
    　複数の前記ロウ付け部材の第１の端部と第２の端部との間をねじってねじり部を形成すると共に、複数の前記扁平管の前記端部を、前記ねじり部と前記第１の端部との間の第１の挟み部と、前記ねじり部と前記第２の端部との間の第２の挟み部とでそれぞれ挟み込むステップと、
    　複数の前記ロウ付け部材を溶融し、複数の前記扁平管と前記冷媒分配器とを接合するステップと、を有する
    　熱交換器の製造方法。     A method for manufacturing a heat exchanger including a plurality of flat tubes and a refrigerant distributor having a plurality of insertion openings into which the plurality of flat tubes are inserted.
    A step of inserting the ends of the plurality of flat tubes into the plurality of insertion openings of the refrigerant distributor, respectively.
    A step of attaching a plurality of U-shaped brazing members to the ends of the plurality of flat tubes, respectively.
    The twisted portion is formed by twisting between the first end portion and the second end portion of the plurality of brazing members, and the end portions of the plurality of flat tubes are formed by twisting the twisted portion and the first end portion. A step of sandwiching the first sandwiching portion between the end portion and the second sandwiching portion between the twisted portion and the second end portion, respectively.
    A method for manufacturing a heat exchanger, comprising a step of melting a plurality of the brazing members and joining the plurality of the flat tubes and the refrigerant distributor.
  6. 　複数の扁平管と、複数の前記扁平管が挿入される複数の挿入開口が形成された冷媒分配器とを備える熱交換器の製造方法であって、
    　複数のＵ字状のロウ付け部材の第１の端部と第２の端部との間をねじってねじり部を形成するステップと、
    　複数の前記扁平管の前記端部を、前記ねじり部と前記第１の端部との間の第１の挟み部と、前記ねじり部と前記第２の端部との間の第２の挟み部とでそれぞれ挟み込むステップと、
    　複数の前記扁平管の端部を、前記冷媒分配器の複数の前記挿入開口にそれぞれ挿入するステップと、
    　複数の前記ロウ付け部材を溶融し、複数の前記扁平管と前記冷媒分配器とを接合するステップと、を有する
    　熱交換器の製造方法。     A method for manufacturing a heat exchanger including a plurality of flat tubes and a refrigerant distributor having a plurality of insertion openings into which the plurality of flat tubes are inserted.
    A step of twisting between the first end and the second end of a plurality of U-shaped brazing members to form a twisted portion,
    The end portions of the plurality of flat tubes are sandwiched between a first sandwiching portion between the twisted portion and the first end portion and a second sandwiching portion between the twisted portion and the second end portion. The steps to be sandwiched between the parts and the parts
    A step of inserting the ends of the plurality of flat tubes into the plurality of insertion openings of the refrigerant distributor, respectively.
    A method for manufacturing a heat exchanger, comprising a step of melting a plurality of the brazing members and joining the plurality of the flat tubes and the refrigerant distributor.
  7. 　前記巻回部又は前記ねじり部は、
    　輪状部を複数有している
    　請求項１～６の何れか１項に記載の熱交換器の製造方法。     The winding part or the twisting part is
    The method for manufacturing a heat exchanger according to any one of claims 1 to 6, which has a plurality of ring-shaped portions.
  8. 　前記ロウ付け部材は、
    　前記扁平管と前記冷媒分配器とを接合するステップにおいて
    　前記巻回部又は前記ねじり部が、前記第１の挟み部及び前記第２の挟み部の上側となるように配置されている
    　請求項１～７の何れか１項に記載の熱交換器の製造方法。     The brazing member is
    Claim 1 in which the winding portion or the twisting portion is arranged above the first sandwiching portion and the second sandwiching portion in the step of joining the flat tube and the refrigerant distributor. The method for manufacturing a heat exchanger according to any one of 7 to 7.
PCT/JP2020/038863 2020-01-16 2020-10-15 Method for manufacturing heat exchanger WO2021145036A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021570648A JP7186903B2 (en) 2020-01-16 2020-10-15 Heat exchanger manufacturing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JPPCT/JP2020/001303 2020-01-16
JP2020001303 2020-01-16

Publications (1)

Publication Number Publication Date
WO2021145036A1 true WO2021145036A1 (en) 2021-07-22

Family

ID=76864277

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/038863 WO2021145036A1 (en) 2020-01-16 2020-10-15 Method for manufacturing heat exchanger

Country Status (2)

Country Link
JP (1) JP7186903B2 (en)
WO (1) WO2021145036A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870967A (en) * 1981-10-23 1983-04-27 Matsushita Refrig Co Soldering method
JPS5870968A (en) * 1981-10-02 1983-04-27 フオ−ド・モ−タ−・カンパニ− Method of soldering cooling pipe to header
JPS5913886U (en) * 1982-07-14 1984-01-27 カルソニックカンセイ株式会社 Heat exchanger connector
JPS61186164A (en) * 1985-02-15 1986-08-19 Sanden Corp Production of aluminum heat exchanger
JPH04288958A (en) * 1991-03-11 1992-10-14 Sanden Corp Manufacture of heat exchanger
JP2012096264A (en) * 2010-11-02 2012-05-24 Furukawa-Sky Aluminum Corp Aluminum alloy preplaced brazing and method for producing the same
JP2019143816A (en) * 2018-02-15 2019-08-29 三菱電機株式会社 Brazing member and heat exchanger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913886A (en) * 1982-07-16 1984-01-24 中島　初吉 Method of treating organic waste
JP2013096264A (en) * 2011-10-29 2013-05-20 Institute Of National Colleges Of Technology Japan Power generation apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870968A (en) * 1981-10-02 1983-04-27 フオ−ド・モ−タ−・カンパニ− Method of soldering cooling pipe to header
JPS5870967A (en) * 1981-10-23 1983-04-27 Matsushita Refrig Co Soldering method
JPS5913886U (en) * 1982-07-14 1984-01-27 カルソニックカンセイ株式会社 Heat exchanger connector
JPS61186164A (en) * 1985-02-15 1986-08-19 Sanden Corp Production of aluminum heat exchanger
JPH04288958A (en) * 1991-03-11 1992-10-14 Sanden Corp Manufacture of heat exchanger
JP2012096264A (en) * 2010-11-02 2012-05-24 Furukawa-Sky Aluminum Corp Aluminum alloy preplaced brazing and method for producing the same
JP2019143816A (en) * 2018-02-15 2019-08-29 三菱電機株式会社 Brazing member and heat exchanger

Also Published As

Publication number Publication date
JP7186903B2 (en) 2022-12-09
JPWO2021145036A1 (en) 2021-07-22

Similar Documents

Publication Publication Date Title
JP6567176B2 (en) Laminated header, heat exchanger, and air conditioner
US10082322B2 (en) Heat exchanger and air-conditioning apparatus
US11713926B2 (en) Heat exchanger and refrigeration cycle apparatus
KR101949059B1 (en) Heat exchanger and air conditioning device
EP2863159B1 (en) Heat exchanger, method for producing same, and refrigeration cycle device
JP6734002B1 (en) Heat exchanger and refrigeration cycle device
EP3088831A1 (en) Stacked header, heat exchanger, and air conditioner
JPH08247678A (en) Heat-exchanger made of aluminum
WO2021145036A1 (en) Method for manufacturing heat exchanger
JP7292510B2 (en) heat exchangers and air conditioners
JP2001124481A (en) Heat exchanger
JP6797304B2 (en) Heat exchanger and air conditioner
WO2019077655A1 (en) Heat exchanger and refrigeration cycle device
EP3112791B1 (en) Laminated header, heat exchanger, and air conditioning device
WO2016038865A1 (en) Outdoor unit and refrigeration cycle device using same
JP6880206B2 (en) How to make a heat exchanger
KR20040008343A (en) Fin & flat tube type Heat exchanger and Evaporator using the same
JP4983878B2 (en) Heat exchanger, refrigerator equipped with this heat exchanger, and air conditioner
JP6440867B2 (en) HEAT EXCHANGER, AIR CONDITIONER EQUIPPED WITH THE SAME, AND METHOD FOR PRODUCING HEAT EXCHANGER
JP2020076531A (en) Heat exchanger and air conditioner including the same
JP7462832B2 (en) Heat exchanger
JP7286015B2 (en) Laminates, heat exchangers and air conditioners
US20230175747A1 (en) Heat exchanger and refrigeration cycle apparatus
EP4043823A1 (en) Heat exchanger, heat exchanger unit, refrigeration cycle apparatus, and heat exchange member manufacturing method
WO2021205905A1 (en) Heat exchanger, air conditioner, and method for manufacturing heat exchanger

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20914586

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021570648

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20914586

Country of ref document: EP

Kind code of ref document: A1