WO2021014603A1 - Heat exchanger and air conditioning device using same - Google Patents

Heat exchanger and air conditioning device using same Download PDF

Info

Publication number
WO2021014603A1
WO2021014603A1 PCT/JP2019/028977 JP2019028977W WO2021014603A1 WO 2021014603 A1 WO2021014603 A1 WO 2021014603A1 JP 2019028977 W JP2019028977 W JP 2019028977W WO 2021014603 A1 WO2021014603 A1 WO 2021014603A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
flat
joint
brazing
insertion port
Prior art date
Application number
PCT/JP2019/028977
Other languages
French (fr)
Japanese (ja)
Inventor
瑞朗 酒井
野花 坂邊
哲矢 山下
尚 堀本
達郎 永山
嘉一 村上
優也 秦
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 JP2021534477A priority Critical patent/JP7170881B2/en
Priority to PCT/JP2019/028977 priority patent/WO2021014603A1/en
Publication of WO2021014603A1 publication Critical patent/WO2021014603A1/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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators

Definitions

  • the present invention relates to a heat exchanger and an air conditioner using the heat exchanger.
  • the heat transfer tube of the heat exchanger to be mounted is a flat tube with a flat shape and a multi-hole tube structure, which has better heat transfer performance than the cylindrical shape. There is a tendency to use it.
  • a heat exchanger using such a flat tube a fin-and-tube type heat exchanger configured by combining a strip-shaped fin and a flat tube is known (for example, a patent). Reference 1).
  • the heat exchanger disclosed in Patent Document 1 includes a flat tube in which a flow path of a refrigerant is divided and formed by a plurality of partition walls, a circular tube having a circular cross section, and a plurality of fins joined to the flat tube. And is configured with.
  • the circular tube is flattened in order to connect the flat tube and the circular tube.
  • Flat tube joints are used to convert flat tubes into circular tubes.
  • the flat pipe joint is a joint that connects a circular pipe and a flat pipe, and has an insertion port corresponding to the flat pipe on one end side and an insertion port corresponding to the circular pipe on the other end side.
  • the flat joint is composed of two joint members having the same shape divided in the vertical cross section, and a relief portion is formed at the back of the insertion port of the flat pipe. Then, the flat joint having such a configuration is joined by brazing a circular pipe and a flat pipe between the joint members divided into two in a state of being interposed at the corresponding insertion ports. It is designed to connect a circular tube and a flat tube.
  • a sufficient brazing material is not supplied to the joint surface as a brazing place where a brazing material is required at the time of brazing, there is a possibility that voids may occur everywhere on the joint surface.
  • the void is a cavity that encloses a foreign substance such as a gas generated from air, a flux or a brazing material, a residual flux, or an oxide. Therefore, in the heat exchanger of Patent Document 1, a sufficient brazing material cannot be spread over the joint surface of the flat joint, and there is a possibility that voids may occur due to a shortage of the brazing material.
  • the present invention is for solving the above problems, and the brazing material can be sufficiently spread over the joint surface where the brazing material is required at the time of brazing, and voids are generated due to insufficient supply of the brazing material. It is an object of the present invention to provide a heat exchanger that can be suppressed and an air conditioner using the same.
  • the heat exchanger according to the present invention comprises a flat tube having a flat cross section, a circular tube having a circular cross section, and a flat joint connecting the circular tube and the flat tube.
  • a heat exchanger to be provided wherein the flat-shaped joint has at least two joint members divided by a vertical cross section at the axial center of the flat pipe and along a long side of the flat pipe, and the two joints.
  • the flat pipe and the circular pipe are interposed between the members and are joined by brazing, and a first insertion port corresponding to the flat pipe is formed on one end side and the other end.
  • a second insertion port corresponding to the circular pipe is formed on the side, and the wax is formed at the brazing portion of the flat pipe on at least one of the two joint members on the first insertion port side.
  • a brazing filler metal storage part is formed to collect the molten brazing filler metal at the time of attachment.
  • the air conditioner according to the present invention is an air conditioner provided with a heat exchanger, and the heat exchanger is used as the heat exchanger.
  • the brazing material is required at the time of brazing.
  • the brazing material can be sufficiently spread on the surface, the shortage of the brazing material can be avoided, and the generation of voids can be suppressed.
  • FIG. It is a schematic diagram which shows the refrigerant circuit of the air conditioner which concerns on Embodiment 1.
  • FIG. It is a perspective view which shows the appearance of the outdoor unit in the air conditioner of FIG. It is an exploded perspective view which shows the structure of the outdoor unit of FIG. It is a perspective view which shows the structure of the heat exchanger used for the outdoor unit of FIG. It is a perspective view which shows the main part in the heat exchanger of FIG. 4 enlarged.
  • It is a perspective view which shows the structure of the joint member in the flat shape joint of FIG.
  • FIG. It is a perspective view which shows the structure of the modification of the joint member of FIG. It is a perspective view which shows the structure of the modification of the joint member of FIG. It is a perspective view which shows the structure of the modification of the joint member of FIG. It is a perspective view which shows the structure of the modification of the joint member of FIG. It is a perspective view which shows the structure of the joint member in the flat joint of the heat exchanger which concerns on Embodiment 2.
  • FIG. It is a perspective view which shows the structure of the modification of the joint member of FIG. It is a perspective view which shows the structure of the modification of the joint member of FIG.
  • FIG. 1 is a schematic view showing a refrigerant circuit 5 of the air conditioner 1 according to the first embodiment.
  • the air conditioner 1 performs cooling or heating operation by transferring heat between the outside air and the indoor air via a refrigerant to perform indoor air. It is for harmonization and has an indoor unit 2 and an outdoor unit 3.
  • the indoor unit 2 and the outdoor unit 3 are connected by pipes via the refrigerant pipes 4, 4a and 4b to form a refrigerant circuit 5 in which the refrigerant circulates.
  • the refrigerant circuit 5 is provided with a compressor 10, a flow path switching device 11, a heat exchanger 12, an expansion valve 13, and an indoor heat exchanger 14, and these are connected via refrigerant pipes 4, 4a, and 4b. ..
  • the outdoor unit 3 has a compressor 10, a flow path switching device 11, a heat exchanger 12, and an expansion valve 13.
  • the compressor 10 compresses and discharges the sucked refrigerant.
  • the compressor 10 may include an inverter device (not shown). When the inverter device is provided, the operation frequency can be changed by the control unit 6 to change the capacity of the compressor 10.
  • the capacity of the compressor 10 is the amount of refrigerant delivered per unit time.
  • the flow path switching device 11 is, for example, a four-way valve, which switches the direction of the refrigerant flow path.
  • the air conditioner 1 can realize a heating operation or a cooling operation by switching the flow of the refrigerant by using the flow path switching device 11 based on the instruction from the control unit 6.
  • the heat exchanger 12 exchanges heat between the refrigerant and the outdoor air. Further, the heat exchanger 12 is provided with an outdoor blower 15 in order to improve the efficiency of heat exchange between the refrigerant and the outdoor air.
  • An inverter device (not shown) may be attached to the outdoor blower 15. In this case, the inverter device changes the rotation speed of the fan by changing the operating frequency of the fan motor 16 which is the drive source of the outdoor blower 15.
  • the outdoor blower 15 is not limited to this as long as the same effect can be obtained.
  • the type of fan may be a sirocco fan or a plug fan.
  • the outdoor blower 15 may be a pushing type or a pulling type.
  • the heat exchanger 12 functions as an evaporator during the heating operation, and exchanges heat between the low-pressure refrigerant flowing in from the refrigerant pipe 4b side and the outdoor air to evaporate and vaporize the refrigerant. , Flow out to the refrigerant pipe 4a side. Further, the heat exchanger 12 functions as a condenser during the cooling operation, and is between the refrigerant compressed by the compressor 10 flowing in from the refrigerant pipe 4a side via the flow path switching device 11 and the outdoor air. The refrigerant is condensed and liquefied, and then discharged to the refrigerant pipe 4b side.
  • the external fluid is not limited to the gas containing the outdoor air, and may be a liquid containing water.
  • the expansion valve 13 is a throttle device that controls the flow rate of the refrigerant, and adjusts the pressure of the refrigerant by adjusting the flow rate of the refrigerant flowing through the refrigerant pipe 4 by changing the opening degree of the expansion valve 13.
  • the expansion valve 13 expands the high-pressure liquid state refrigerant into the low-pressure gas-liquid two-phase state refrigerant to reduce the pressure.
  • the expansion valve 13 is not limited to this, and an electronic expansion valve, a capillary tube, or the like may be used as long as the same effect can be obtained.
  • the opening degree is adjusted based on the instruction of the control unit 6.
  • the indoor unit 2 includes an indoor heat exchanger 14 that exchanges heat between the refrigerant and the indoor air, and an indoor blower 17 that adjusts the flow of air that the indoor heat exchanger 14 exchanges heat with.
  • the indoor heat exchanger 14 acts as a condenser during the heating operation, exchanges heat between the refrigerant flowing in from the refrigerant pipe 4a side and the indoor air, condenses the refrigerant and liquefies it, and causes the refrigerant pipe. Let it flow out to the 4b side. Further, the indoor heat exchanger 14 functions as an evaporator during the cooling operation, and exchanges heat between the refrigerant brought into a low pressure state by the expansion valve 13 flowing in from the refrigerant pipe 4b side and the indoor air. The refrigerant takes heat from the air, evaporates it, vaporizes it, and causes it to flow out to the refrigerant pipe 4a side.
  • the indoor air is used as the external fluid
  • the external fluid is not limited to the gas containing the indoor air and may be a liquid containing water.
  • the operating speed of the indoor blower 17 is determined by the user's setting. It is preferable to attach an inverter device to the indoor blower 17 and change the operating frequency of the fan motor 18 to change the rotation speed of the fan.
  • the indoor blower 17 is not limited to this as long as the same effect can be obtained.
  • the type of fan may be a sirocco fan or a plug fan.
  • the indoor blower 17 may be a pushing type or a pulling type.
  • This gas-liquid two-phase refrigerant flows into the indoor heat exchanger 14 of the indoor unit 2, evaporates by heat exchange with the indoor air blown by the indoor blower 17, becomes a low-temperature low-pressure gas refrigerant, and becomes an indoor heat exchanger. Outflow from 14. At this time, the indoor air that has been cooled by being absorbed by the refrigerant becomes air-conditioned air (blown air) and is blown out from the indoor unit 2 into the room that is the air-conditioned space. The gas refrigerant flowing out of the indoor heat exchanger 14 is sucked into the compressor 10 via the flow path switching device 11 and is compressed again. In the cooling operation of the air conditioner 1, the above operation is repeated (indicated by the solid arrow in FIG. 1).
  • the high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 10 flows into the indoor heat exchanger 14 of the indoor unit 2 via the flow path switching device 11.
  • the gas refrigerant flowing into the indoor heat exchanger 14 is condensed by heat exchange with the indoor air blown by the indoor blower 17, becomes a low-temperature refrigerant, and flows out from the indoor heat exchanger 14.
  • the indoor air that has been warmed by receiving heat from the gas refrigerant becomes conditioned air (blown air) and is blown out from the indoor unit 2 into the room.
  • the refrigerant flowing out of the indoor heat exchanger 14 is expanded and depressurized by the expansion valve 13 to become a low-temperature low-pressure gas-liquid two-phase refrigerant.
  • This gas-liquid two-phase refrigerant flows into the heat exchanger 12 of the outdoor unit 3, evaporates by heat exchange with the outside air blown by the outdoor blower 15, becomes a low-temperature low-pressure gas refrigerant, and flows out from the heat exchanger 12. To do.
  • the gas refrigerant flowing out of the heat exchanger 12 is sucked into the compressor 10 via the flow path switching device 11 and is compressed again. In the heating operation of the air conditioner 1, the above operation is repeated (indicated by the broken line arrow in FIG. 1).
  • FIG. 2 is a perspective view showing the appearance of the outdoor unit 3 in the air conditioner 1 of FIG.
  • FIG. 3 is an exploded perspective view showing the configuration of the outdoor unit 3 of FIG.
  • the housing panel 30 covering the outer shell is formed in a rectangular parallelepiped shape.
  • the inside of the housing panel 30 is divided into an air passage chamber 32 and a machine room 33 by a partition plate 31.
  • An outdoor blower 15 is installed on the front side of the housing panel 30 in the air passage chamber 32. Further, on the back side of the outdoor blower 15 in the air passage chamber 32, a heat exchanger 12 mounted in an L shape from the back side to the side surface side of the air passage chamber 32 of the housing panel 30 is installed.
  • the housing panel 30 is composed of a front upper outer panel 30a, a front lower outer panel 30b, a back upper outer panel 30c, a back lower lower outer panel 30d, a top outer panel 30e, a side outer panel 30f, and a front panel 30g. Further, the housing panel 30 surrounds the four side surfaces of the air passage chamber 32 and the four side surfaces of the machine room 33 together with the partition plate 31.
  • the configuration of the housing panel 30 of the machine room 33 described above is an example, and the number of parts of the housing panel 30 or the position of the seam is not limited.
  • the outdoor unit 3 may be an outdoor unit 3 using a front outer panel in which the front upper outer panel 30a and the front lower outer panel 30b are integrated.
  • the outdoor blower 15 is provided with a plurality of blades 15b on the outer periphery of the boss 15a, which is the center of rotation, and is rotationally driven by a fan motor 16 (see FIG. 1). Further, the front panel 30g located on the front side of the outdoor blower 15 in the housing panel 30 has a slit-shaped outlet 30h for discharging the air inside the housing panel 30 to the outside of the housing panel 30. Is provided.
  • a compressor 10 is installed which is connected to the heat exchanger 12 via a refrigerant pipe 4 (see FIG. 1) and supplies the refrigerant to the heat exchanger 12.
  • the compressor 10 may be equipped with a thermal protector that functions as an overheat protection device that detects the surface temperature of the compressor 10.
  • electric parts such as a power module and an inverter board are installed, including a current sensor that detects whether or not the outdoor unit 3 is operating.
  • FIG. 4 is a perspective view showing the configuration of the heat exchanger 12 used in the outdoor unit 3 of FIG.
  • FIG. 5 is an enlarged perspective view showing a main part of the heat exchanger 12 of FIG.
  • FIG. 6 is a perspective view showing the configuration of the flat joint 20 in the heat exchanger 12 of FIG.
  • FIG. 7 is a perspective view showing the configuration of the joint member 21 in the flat joint 20 of FIG.
  • FIG. 8 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. 7.
  • FIG. 9 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. 7.
  • FIG. 10 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. 7.
  • FIG. 11 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. 7.
  • joint members 21 and 22 constituting the flat joint 20 will be illustrated and described in FIGS. 7 to 11, but this also includes the other joint member 22. Since they are configured in the same manner, they are omitted for convenience. That is, although the details will be described later, the joint members 21 and 22 constituting the flat joint 20 have the same shape.
  • the joint members 21 and 22 are joined so as to face each other in a superposed state to form a flat joint 20.
  • the heat exchanger 12 increases the heat transfer area between the flat tube 121, which is a flat heat transfer tube through which the refrigerant flows, and the refrigerant flowing through the flat tube 121 and the outside air. It has a structure in which a heat exchanger 120 having a fin 122 for the purpose is provided in parallel. That is, the heat exchanger 12 is configured as a so-called two-row structure fin-and-tube type heat exchanger having two heat exchangers 120. In the case of the first embodiment, the heat exchanger 12 is formed in an L shape as a whole according to the shape of the outdoor unit 3 (see FIGS. 2 and 3) to be mounted.
  • the fins 122 are formed in a strip shape and are arranged in a state of being vertically extended in the vertical direction, and a plurality of fins 122 are provided side by side at intervals in the horizontal direction orthogonal to the vertical direction.
  • the flat pipe 121 has a multi-hole pipe structure having a flat cross section, is arranged in a horizontally extended state, and is provided by stacking a plurality of flat pipes 121 at intervals in the vertical direction. Each of these flat tubes 121 is inserted into the fin 122 and connected in a penetrating state. Then, the flat tube 121 and the fin 122 are joined by brazing after assembly.
  • the fin material is a clad material having a brazing filler metal layer.
  • the fin 122 is clad together with the core material by using an aluminum alloy having a melting point lower than that of the aluminum alloy as the core material as a brazing material layer. After assembling, the flat tube 121 and the fin 122 are heated for joining. Further, the fin material may be a bare material, and the flat tube 121 side coated with a brazing material may be used and similarly heated and joined. Alternatively, the fin material is a bare material, the flat tube 121 side does not have a brazing material, and after assembling the fin 122 and the flat tube 121, a rod-shaped brazing material is placed or a paste brazing material is applied. , There is also a method of supplying a brazing material and heating it in the same manner for joining.
  • the flat tube 121 has a flat shape having an oval cross section perpendicular to the extension direction, and is composed of an outer shape in which the short side is formed in an arc shape and the long side is formed in a flat shape. There is. Since the flat tube 121 has a multi-hole tube structure, the contact area between the inner surface of the heat transfer tube and the refrigerant increases as compared with the circular tube-shaped heat transfer tube, so that the flat tube 121 is excellent in heat exchange efficiency.
  • the material of the flat tube 121 is mainly aluminum or an aluminum alloy, and is formed by a processing method such as extrusion molding or pultrusion molding. Pitting corrosion occurs in the flat tube 121 having a flat cross section as corrosion progresses.
  • a sacrificial anode layer is formed on the outer surface of the flat tube 121 by using a technique such as zinc spraying in order to prevent leakage of the refrigerant in the tube due to the occurrence of pitting corrosion.
  • the flat tubes 121 are staggered so that the flat tubes 121 do not intersect the flow. That is, the flat tubes 121 of the heat exchanger 120 on the upstream side and the flat tubes 121 of the heat exchanger 120 on the downstream side are alternately arranged in the vertical direction. As a result, the wind is uniformly supplied to all the flat tubes 121, thereby preventing the heat exchange efficiency from being lowered.
  • the end of the flat tube 121 as a main part in the heat exchanger 12 enlarged in FIG. 5 is converted into a circular tube shape by being connected to the circular tube 123 via the flat joint 20. ..
  • a distribution circuit such as a distributor 125 and a header 126 is connected to the circular tube 123.
  • the distributor 125 distributes the refrigerant to each flat tube 121
  • the header 126 has a function of collecting the refrigerant.
  • the flat tubes 121 of the heat exchanger 120 on the upstream side and the flat tubes 121 of the heat exchanger 120 on the downstream side, which are alternately arranged vertically, are connected to each other via the U bend tube 124.
  • the U-bend pipe 124 is formed by bending a pipe having a circular cross section into a U shape.
  • the flat joint 20 has at least two joint members 21 and 22 divided in a vertical cross section at the axial center of the flat pipe 121 and along the long side of the flat shape. It is composed. Further, in the flat joint 20, a first insertion port 20a corresponding to the flat pipe 121 is formed on one end side, and a second insertion port 20b corresponding to the circular pipe 123 is formed on the other end side. Has been done. Then, in the flat joint 20, the flat pipe 121 and the circular pipe 123 are interposed between two joint members 21 and 22 having the same shape, and the joint members 21 and 22 are stacked so as to face each other in a monaca shape. It is formed by joining together and joining by brazing.
  • the joint member 21 includes engaging protrusions 23 and 24 for alignment when the joint members 21 and 22 are joined, and engaging holes 25 and 26 at portions facing the joint member 22. Is formed.
  • the joint member 22 is also configured in the same manner as the joint member 21. Therefore, when the joint member 21 and the joint member 22 are overlapped with each other facing each other, the engaging protrusion 23 of the joint member 21, the engaging hole 25 of the joint member 22, and the engaging protruding portion 24 of the joint member 21 and The engaging hole 26 of the joint member 22 engages. Similarly, the engaging hole 25 of the joint member 21 and the engaging protruding portion 23 of the joint member 22 are engaged with the engaging hole 26 of the joint member 21 and the engaging protruding portion 24 of the joint member 22. As a result, when the joint member 21 and the joint member 22 face each other and are overlapped with each other, the alignment can be easily and accurately performed.
  • the brazed material that collects the brazed material melted at the time of brazing is stored in the brazed portion which is the joint surface of the flat pipe 121 on the first insertion port 20a side.
  • the portion 21a is formed.
  • the joint member 21 and the joint member 22 shown in FIG. 6 have the same shape, but the brazing material storage portion 21a may be provided at the brazed portion of either the joint member 21 or 22 or the joint. It may be provided at the brazed portion of both the members 21 and 22.
  • the brazing filler metal storage portion 21a is formed as a recess opened toward the flat pipe 121, and the recess is arranged parallel to the opening of the first insertion port 20a and continuously linearly.
  • the distance from the opening end portion on the first insertion port 20a side of the joint member 21 is from the end portion of the flat pipe 121 inserted into the first insertion port 20a. It is placed at a position shorter than the distance of.
  • the brazing material melted during brazing can flow and stay in the brazing material storage section 21a due to the capillary phenomenon, and the brazing material is placed at a place where voids are to be prevented from being generated. It is possible to braze. Therefore, it is possible to suppress the generation of voids due to insufficient supply of brazing material at the brazed portion.
  • the brazing filler metal storage portion 21a By defining the position where the brazing filler metal storage portion 21a is arranged, it is possible to suppress the inflow of the brazing filler metal into the flat tube 121 and prevent the brazing filler metal from clogging.
  • the brazing filler metal storage portion 21a As a method for forming the brazing filler metal storage portion 21a, it can be formed by simultaneously forming a recess during pressing or by making a notch after press forming.
  • the cross-sectional shape of the concave portion on the surface of the brazed portion has various forms such as a semicircular shape, a triangular shape, or a rectangular shape, and a certain effect can be obtained in any configuration.
  • the brazing material flows into the flat pipe 121 or the circular pipe 123 between the first insertion port 20a and the second insertion port 20b.
  • a relief portion 20c is formed to prevent the occurrence of wax clogging.
  • the relief portion 20c of the flat joint 20 has a larger bulge toward the outside than the first insertion port 20a and the second insertion port 20b.
  • the relief portion 20c is also provided in the joint member 22 (see FIG. 6) having the same shape as the joint member 21.
  • the brazing material storage portion 21a is provided at the brazed portion of one or both of the joint members 21 and 22 constituting the flat joint 20 with respect to the opening of the first insertion port 20a.
  • the case where the groove portions are formed in parallel and continuously arranged linearly has been described.
  • the shape and arrangement of the brazing filler metal storage portion 21a is not limited to this. That is, the brazing filler metal storage portion 21a may be formed in a partially recessed state or may be formed in a linear grooved state.
  • the brazing filler metal storage portion 21a is parallel and linear with respect to the opening of the first insertion port 20a, for example, as shown in FIG. 8 in which the portion corresponding to FIG. 7 is designated by the same reference numeral.
  • a plurality of portions may be arranged in parallel with respect to the opening of the first insertion port 20a in a state of continuous grooves.
  • the brazing material storage portion 21a is parallel to the opening of the first insertion port 20a and intermittently and linearly. That is, it may be formed as a groove portion arranged in a broken line shape. Even in this case, the same effect as that of the first embodiment described above can be obtained.
  • the brazing filler metal storage portions 21a are parallel to the opening of the first insertion port 20a and are spaced on the same line. It may be formed as a linear groove portion arranged in a row. This makes it possible to concentrate the brazing material in a place where the brazing material is particularly difficult to rotate.
  • the brazing material storage portions 21a are provided at both ends except the center of the brazed portion, but a certain effect can be obtained with other configurations such as forming the brazing material storage portion 21a only in the central portion. Will be brazed.
  • the brazing filler metal storage portion 21a is formed as a plurality of groove portions radially arranged toward the opening of the first insertion port 20a, as shown in FIG. 11 in which the corresponding portions corresponding to those in FIG. 7 are designated by the same reference numerals. May be done.
  • This makes it possible to dispose the solidified brazing material in the direction of the refrigerant flow. Therefore, it is possible to form fillets on both side surfaces of the brazing filler metal storage portion 21a on the side that comes into contact with the outside air and the side that comes into contact with the refrigerant, and it is possible to control or eliminate the void generation position in the center. It becomes.
  • FIG. 11 the brazing filler metal storage portion 21a is formed as a plurality of groove portions radially arranged toward the opening of the first insertion port 20a, as shown in FIG. 11 in which the corresponding portions corresponding to those in FIG. 7 are designated by the same reference numerals. May be done.
  • This makes it possible to dispose the solidified
  • FIG. 11 shows a case where three radial brazing material storage portions 21a are arranged, but depending on the amount of brazed material supplied at the time of brazing or the shape of the brazed part, a certain effect can be obtained if a plurality of the brazing material storage portions are provided. can get.
  • the flat shape joint 20 connecting the flat pipe 121 and the circular pipe 123 has the flat shape.
  • the brazing material storage portion 21a is provided at one or both brazing points of the joint members 21 and 22 constituting the joint 20.
  • FIG. 12 is a perspective view showing the configuration of the joint member 21 in the flat joint 20 of the heat exchanger 12 according to the second embodiment.
  • FIG. 13 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG.
  • FIG. 14 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG.
  • the joint member 22 in the flat joint 20 will be illustrated and described, but the joint member 22 also has the same shape as the joint member 21. Therefore, it is omitted for convenience.
  • the brazing material storage portion 21a of the second embodiment is the brazing of the flat pipe 121 on the first insertion port 20a side of the joint member 21. It is formed as a through hole penetrating the front and back surfaces of the joint member 21 at the location. As a result, a loophole of the brazing material melted at the time of brazing and the flux material for activating the function of the brazing material is formed. Therefore, before the brazing material solidifies, the flux material that has been activated and is no longer needed can be removed from the brazing material storage portion 21a formed at the brazed portion, and the brazing material also collects around the through hole.
  • the brazing material storage portion 21a in the through-hole state it is formed by making a hole at the time of pressing, performing hole processing after pressing, or the like, as in the first embodiment.
  • the brazed material storage portion 21a in the through-hole state is not limited to one, and a plurality of brazed material storage portions 21a may be formed at the brazed portion.
  • a plurality (two in this case) of brazed material storage portions 21a may be formed at the brazed portion of the joint member 21. Good.
  • the brazing material storage portion 21a from which the molten brazing material and the flux material are removed during brazing can be arranged at a position where the solidified brazing material is required, and it becomes possible to suppress the generation of voids.
  • brazed material storage portions 21a composed of a plurality of through holes are provided at both brazed portions of the two joint members 21 and 22, respectively. It may be arranged in the same direction and at the same position from the center of the first insertion port 20a and the joint members 21 and 22. In this case, the plurality of brazing filler metal storage portions 21a are arranged so as to be in staggered positions when the two joint members 21 and 22 are overlapped with each other facing each other.
  • the brazing material storage portion 21a as a loophole between the brazing material melted at the time of brazing and the flux material can be arranged at a place where the solidified brazing material is required without waste, and the generation of voids can be further suppressed. Is possible.
  • the flat shape joint 20 connecting the flat pipe 121 and the circular pipe 123 has the flat shape.
  • a brazing material storage portion 21a is provided as a through hole in one or both brazed portions of the joint members 21 and 22 constituting the joint 20.

Abstract

This heat exchanger comprises a flat tube, a circular tube, and a flat joint that connects the flat tube and the circular tube. The flat joint has at least two joint members obtained by dividing the same at a longitudinal section along the long side of the flat shape and at the center of the axis of the flat tube, and is formed by brazing the two joint members with the flat tube and the circular tube interposed therebetween. A first insertion port corresponding to the flat tube is formed on one end side of the flat joint and a second insertion port corresponding to the circular tube is formed on the other end side. A brazing material reservoir for collecting the molten brazing material during brazing is formed at the first insertion port-side portion of at least one of the two joint members where the flat tube is brazed. Thus, by collecting the brazing material in the brazing material reservoir provided at the portion of the flat joint where the flat tube is brazed, the brazing material can be sufficiently distributed to the joint surface where the brazing material is required during brazing, and the generation of voids due to insufficient supply of the brazing material can be suppressed.

Description

熱交換器およびそれを用いた空気調和装置Heat exchanger and air conditioner using it
　本発明は、熱交換器およびそれを用いた空気調和装置に関する。 The present invention relates to a heat exchanger and an air conditioner using the heat exchanger.
　空気調和装置では、室外機の小型化および高性能化を図るため、搭載される熱交換器の伝熱管として、円筒形状よりも伝熱性能に優れた扁平形状で多穴管構造の扁平管を用いる傾向となっている。このような扁平管を用いた熱交換器としては、帯板状に成形されたフィンと、扁平管と、を組み合わせて構成されたフィンアンドチューブ型熱交換器が知られている（例えば、特許文献１参照）。 In the air conditioner, in order to reduce the size and improve the performance of the outdoor unit, the heat transfer tube of the heat exchanger to be mounted is a flat tube with a flat shape and a multi-hole tube structure, which has better heat transfer performance than the cylindrical shape. There is a tendency to use it. As a heat exchanger using such a flat tube, a fin-and-tube type heat exchanger configured by combining a strip-shaped fin and a flat tube is known (for example, a patent). Reference 1).
　かかる特許文献１に開示された熱交換器は、複数の隔壁で冷媒の流路が分割形成された扁平管と、横断面が円形状の円管と、扁平管に接合されている複数のフィンと、を備えて構成されている。この熱交換器では、円管をＵ字形状に曲折したＵベンド管または分配器と、扁平管と、の接続部分において、これら扁平管と円管とを接続するために、円管を扁平管にまたは扁平管を円管に変換するための扁平管継手が用いられている。 The heat exchanger disclosed in Patent Document 1 includes a flat tube in which a flow path of a refrigerant is divided and formed by a plurality of partition walls, a circular tube having a circular cross section, and a plurality of fins joined to the flat tube. And is configured with. In this heat exchanger, at the connection portion between the U-bend tube or the distributor in which the circular tube is bent into a U shape and the flat tube, the circular tube is flattened in order to connect the flat tube and the circular tube. Flat tube joints are used to convert flat tubes into circular tubes.
　扁平管継手は、円管と扁平管とを接続する継手であり、一端側に扁平管に対応した差込み口を有し、他端側に円管に対応した差込み口を有している。なお、扁平形状で多穴管構造の扁平管におけるアスペクト比によっては、一体型の継手形成が困難な場合がある。そのため、扁平形状継手は、縦断面で分割された同じ形状の２つの継手部材で構成され、扁平管の差込み口の奥部に逃げ部が形成されている。そして、このような構成の扁平形状継手は、２つに分割された継手部材の間に、円管と扁平管とを、それぞれに対応した差込み口に介在した状態でろう付されることによって接合され、円管と扁平管とを接続するようになっている。 The flat pipe joint is a joint that connects a circular pipe and a flat pipe, and has an insertion port corresponding to the flat pipe on one end side and an insertion port corresponding to the circular pipe on the other end side. Depending on the aspect ratio of the flat pipe having a flat shape and a multi-hole pipe structure, it may be difficult to form an integrated joint. Therefore, the flat joint is composed of two joint members having the same shape divided in the vertical cross section, and a relief portion is formed at the back of the insertion port of the flat pipe. Then, the flat joint having such a configuration is joined by brazing a circular pipe and a flat pipe between the joint members divided into two in a state of being interposed at the corresponding insertion ports. It is designed to connect a circular tube and a flat tube.
特開２０１６－３８１４１号公報Japanese Unexamined Patent Publication No. 2016-38141
　しかしながら、特許文献１の熱交換器では、扁平形状継手における扁平管のろう付箇所が面接触でのろう付となる。とりわけ、扁平形状継手は、継手部材同士を組み合わせた際のクリアランスなどの影響により、溶融したろう材が扁平形状継手の内壁をどのように伝って流れるか予測が困難であった。 However, in the heat exchanger of Patent Document 1, the brazed portion of the flat tube in the flat joint is brazed by surface contact. In particular, in the flat joint, it is difficult to predict how the molten brazing material flows along the inner wall of the flat joint due to the influence of the clearance when the joint members are combined.
　また、ろう付時にろう材が必要となるろう付箇所としての接合面に十分なろう材が供給されていない場合、当該接合面の随所でボイドが発生する虞があった。このボイドとは、空気、フラックス若しくはろう材から発生したガス、残留したフラックス、または酸化物等の異物を包み込んだ空洞のことである。よって、特許文献１の熱交換器では、扁平形状継手における接合面に十分なろう材を行き亘らせることができず、ろう材が不足することにより、ボイドが発生する虞があった。 Further, if a sufficient brazing material is not supplied to the joint surface as a brazing place where a brazing material is required at the time of brazing, there is a possibility that voids may occur everywhere on the joint surface. The void is a cavity that encloses a foreign substance such as a gas generated from air, a flux or a brazing material, a residual flux, or an oxide. Therefore, in the heat exchanger of Patent Document 1, a sufficient brazing material cannot be spread over the joint surface of the flat joint, and there is a possibility that voids may occur due to a shortage of the brazing material.
　本発明は、上記課題を解決するためのものであり、ろう付時にろう材が必要となる接合面にろう材を十分に行き亘らせることができ、ろう材の供給不足によるボイドの発生を抑制できる熱交換器およびそれを用いた空気調和装置を提供することを目的とする。 The present invention is for solving the above problems, and the brazing material can be sufficiently spread over the joint surface where the brazing material is required at the time of brazing, and voids are generated due to insufficient supply of the brazing material. It is an object of the present invention to provide a heat exchanger that can be suppressed and an air conditioner using the same.
　本発明に係る熱交換器は、横断面が扁平形状の伝熱管である扁平管と、横断面が円形状の円管と、前記円管と前記扁平管とを接続する扁平形状継手と、を備える熱交換器であって、前記扁平形状継手は、前記扁平管の軸中心で且つ前記扁平形状の長辺に沿った縦断面で分割された少なくとも２つの継手部材を有し、前記２つの継手部材の間に前記扁平管と前記円管とを介在した状態で、ろう付によって接合されてなり、一端側に前記扁平管に対応した第一の差込口が形成されていると共に、他端側に前記円管に対応した第二の差込口が形成されており、前記２つの継手部材における少なくとも一方の前記第一の差込口側における前記扁平管のろう付箇所には、前記ろう付の際に溶融したろう材を集めるろう材貯留部が形成されているものである。 The heat exchanger according to the present invention comprises a flat tube having a flat cross section, a circular tube having a circular cross section, and a flat joint connecting the circular tube and the flat tube. A heat exchanger to be provided, wherein the flat-shaped joint has at least two joint members divided by a vertical cross section at the axial center of the flat pipe and along a long side of the flat pipe, and the two joints. The flat pipe and the circular pipe are interposed between the members and are joined by brazing, and a first insertion port corresponding to the flat pipe is formed on one end side and the other end. A second insertion port corresponding to the circular pipe is formed on the side, and the wax is formed at the brazing portion of the flat pipe on at least one of the two joint members on the first insertion port side. A brazing filler metal storage part is formed to collect the molten brazing filler metal at the time of attachment.
　また、本発明に係る空気調和装置は、熱交換器を備えた空気調和装置であって、前記熱交換器として、上記熱交換器を用いるものである。 Further, the air conditioner according to the present invention is an air conditioner provided with a heat exchanger, and the heat exchanger is used as the heat exchanger.
　本発明に係る熱交換器およびそれを用いた空気調和装置によれば、扁平形状継手のろう付箇所に設けたろう材貯留部にろう材を集めることで、ろう付時にろう材が必要となる接合面にろう材を十分に行き亘らせることができ、ろう材の不足を回避してボイドの発生を抑制できる。 According to the heat exchanger according to the present invention and the air conditioner using the same, by collecting the brazing material in the brazing material storage portion provided at the brazing part of the flat joint, the brazing material is required at the time of brazing. The brazing material can be sufficiently spread on the surface, the shortage of the brazing material can be avoided, and the generation of voids can be suppressed.
実施の形態１に係る空気調和装置の冷媒回路を示す模式図である。It is a schematic diagram which shows the refrigerant circuit of the air conditioner which concerns on Embodiment 1. FIG. 図１の空気調和装置における室外機の外観を示す斜視図である。It is a perspective view which shows the appearance of the outdoor unit in the air conditioner of FIG. 図２の室外機の構成を示す分解斜視図である。It is an exploded perspective view which shows the structure of the outdoor unit of FIG. 図２の室外機に用いられる熱交換器の構成を示す斜視図である。It is a perspective view which shows the structure of the heat exchanger used for the outdoor unit of FIG. 図４の熱交換器における要部を拡大して示す斜視図である。It is a perspective view which shows the main part in the heat exchanger of FIG. 4 enlarged. 図５の熱交換器における扁平形状継手の構成を示す斜視図である。It is a perspective view which shows the structure of the flat joint in the heat exchanger of FIG. 図６の扁平形状継手における継手部材の構成を示す斜視図である。It is a perspective view which shows the structure of the joint member in the flat shape joint of FIG. 図７の継手部材における変形例の構成を示す斜視図である。It is a perspective view which shows the structure of the modification of the joint member of FIG. 図７の継手部材における変形例の構成を示す斜視図である。It is a perspective view which shows the structure of the modification of the joint member of FIG. 図７の継手部材における変形例の構成を示す斜視図である。It is a perspective view which shows the structure of the modification of the joint member of FIG. 図７の継手部材における変形例の構成を示す斜視図である。It is a perspective view which shows the structure of the modification of the joint member of FIG. 実施の形態２に係る熱交換器の扁平形状継手における継手部材の構成を示す斜視図である。It is a perspective view which shows the structure of the joint member in the flat joint of the heat exchanger which concerns on Embodiment 2. FIG. 図１２の継手部材における変形例の構成を示す斜視図である。It is a perspective view which shows the structure of the modification of the joint member of FIG. 図１２の継手部材における変形例の構成を示す斜視図である。It is a perspective view which shows the structure of the modification of the joint member of FIG.
　以下、図面に基づいて、本発明に係る熱交換器およびそれを空気調和装置に適用した場合の実施の形態について説明する。なお、明細書全文に示す構成要素の形態は、あくまで例示であってこれらの記載に限定されるものではない。すなわち、本発明は、請求の範囲および明細書全体から読み取ることのできる発明の要旨又は思想に反しない範囲で適宜変更可能である。また、そのような変更を伴う熱交換器およびそれを用いた空気調和装置も本発明の技術思想に含まれる。さらに、各図において、同一の符号を付したものは、同一の又はこれに相当するものであり、これは明細書の全文において共通している。 Hereinafter, the heat exchanger according to the present invention and the embodiment when the heat exchanger is applied to the air conditioner will be described with reference to the drawings. It should be noted that the forms of the components shown in the entire specification are merely examples and are not limited to these descriptions. That is, the present invention can be appropriately modified as long as it does not contradict the gist or idea of the invention that can be read from the claims and the entire specification. Further, a heat exchanger accompanied by such a change and an air conditioner using the heat exchanger are also included in the technical idea of the present invention. Further, in each figure, those having the same reference numerals are the same or equivalent thereof, which are common in the whole text of the specification.
実施の形態１．
＜空気調和装置１の構成＞
　図１を参照しながら、実施の形態１に係る空気調和装置１について説明する。図１は、実施の形態１に係る空気調和装置１の冷媒回路５を示す模式図である。 Embodiment 1.
<Configuration of air conditioner 1>
The air conditioner 1 according to the first embodiment will be described with reference to FIG. FIG. 1 is a schematic view showing a refrigerant circuit 5 of the air conditioner 1 according to the first embodiment.
　図１に示すように、本実施の形態１に係る空気調和装置１は、冷媒を介して外気と室内の空気との間で熱を移動させることにより、冷房または暖房運転を行って室内の空気調和を行うものであり、室内機２と室外機３とを有している。 As shown in FIG. 1, the air conditioner 1 according to the first embodiment performs cooling or heating operation by transferring heat between the outside air and the indoor air via a refrigerant to perform indoor air. It is for harmonization and has an indoor unit 2 and an outdoor unit 3.
　空気調和装置１においては、室内機２と室外機３とが冷媒配管４、４ａ、４ｂを介して配管接続され、冷媒が循環する冷媒回路５を構成している。冷媒回路５には、圧縮機１０、流路切替装置１１、熱交換器１２、膨張弁１３および室内熱交換器１４が設けられ、これらが冷媒配管４、４ａ、４ｂを介して接続されている。 In the air conditioner 1, the indoor unit 2 and the outdoor unit 3 are connected by pipes via the refrigerant pipes 4, 4a and 4b to form a refrigerant circuit 5 in which the refrigerant circulates. The refrigerant circuit 5 is provided with a compressor 10, a flow path switching device 11, a heat exchanger 12, an expansion valve 13, and an indoor heat exchanger 14, and these are connected via refrigerant pipes 4, 4a, and 4b. ..
　室外機３は、圧縮機１０、流路切替装置１１、熱交換器１２および膨張弁１３を有している。圧縮機１０は、吸入した冷媒を圧縮して吐出する。ここで、圧縮機１０は、不図示のインバータ装置を備えていてもよい。インバータ装置を備えた場合、制御部６によって運転周波数を変化させて、圧縮機１０の容量を変更することができる。なお、圧縮機１０の容量とは、単位時間当たりに送り出す冷媒の量である。 The outdoor unit 3 has a compressor 10, a flow path switching device 11, a heat exchanger 12, and an expansion valve 13. The compressor 10 compresses and discharges the sucked refrigerant. Here, the compressor 10 may include an inverter device (not shown). When the inverter device is provided, the operation frequency can be changed by the control unit 6 to change the capacity of the compressor 10. The capacity of the compressor 10 is the amount of refrigerant delivered per unit time.
　流路切替装置１１は、例えば四方弁であり、冷媒流路の方向の切り換えが行われる装置である。空気調和装置１は、制御部６からの指示に基づいて、流路切替装置１１を用いて冷媒の流れを切り換えることで、暖房運転または冷房運転を実現することができる。熱交換器１２は、冷媒と室外空気との熱交換を行う。また、熱交換器１２には、冷媒と室外空気との間の熱交換の効率を高めるために、室外送風機１５が設けられている。室外送風機１５には、不図示のインバータ装置が取り付けられていてもよい。この場合、インバータ装置は、室外送風機１５の駆動源であるファンモーター１６の運転周波数を変化させてファンの回転速度を変更する。なお、室外送風機１５は、同様の効果が得られるものであればこれに限らず、例えばファンの種類はシロッコファンでもよいし、プラグファンでもよい。また、室外送風機１５は押し込み方式でもよいし、引っぱり方式でもよい。 The flow path switching device 11 is, for example, a four-way valve, which switches the direction of the refrigerant flow path. The air conditioner 1 can realize a heating operation or a cooling operation by switching the flow of the refrigerant by using the flow path switching device 11 based on the instruction from the control unit 6. The heat exchanger 12 exchanges heat between the refrigerant and the outdoor air. Further, the heat exchanger 12 is provided with an outdoor blower 15 in order to improve the efficiency of heat exchange between the refrigerant and the outdoor air. An inverter device (not shown) may be attached to the outdoor blower 15. In this case, the inverter device changes the rotation speed of the fan by changing the operating frequency of the fan motor 16 which is the drive source of the outdoor blower 15. The outdoor blower 15 is not limited to this as long as the same effect can be obtained. For example, the type of fan may be a sirocco fan or a plug fan. Further, the outdoor blower 15 may be a pushing type or a pulling type.
　ここで、熱交換器１２は、暖房運転時において蒸発器として機能し、冷媒配管４ｂ側から流入した低圧の冷媒と、室外空気と、の間で熱交換を行って冷媒を蒸発させて気化させ、冷媒配管４ａ側に流出させる。また、熱交換器１２は、冷房運転時において凝縮器として機能し、冷媒配管４ａ側から流路切替装置１１を介して流入した圧縮機１０にて圧縮済の冷媒と、室外空気と、の間で熱交換を行い、冷媒を凝縮させて液化させ、冷媒配管４ｂ側に流出させる。なお、ここでは室外空気を外部流体として用いる場合を例に説明したが、外部流体は室外空気を含む気体に限らず、水を含む液体であってもよい。 Here, the heat exchanger 12 functions as an evaporator during the heating operation, and exchanges heat between the low-pressure refrigerant flowing in from the refrigerant pipe 4b side and the outdoor air to evaporate and vaporize the refrigerant. , Flow out to the refrigerant pipe 4a side. Further, the heat exchanger 12 functions as a condenser during the cooling operation, and is between the refrigerant compressed by the compressor 10 flowing in from the refrigerant pipe 4a side via the flow path switching device 11 and the outdoor air. The refrigerant is condensed and liquefied, and then discharged to the refrigerant pipe 4b side. Although the case where the outdoor air is used as the external fluid has been described here as an example, the external fluid is not limited to the gas containing the outdoor air, and may be a liquid containing water.
　膨張弁１３は、冷媒の流量を制御する絞り装置であり、膨張弁１３の開度を変化させることで冷媒配管４を流れる冷媒の流量を調節することにより、冷媒の圧力を調整する。膨張弁１３は、冷房運転時において、高圧の液状態の冷媒を低圧の気液二相状態の冷媒へと膨張させ減圧させる。なお、膨張弁１３としてはこれに限らず、同様の効果が得られるものであれば、電子膨張弁またはキャピラリーチューブ等でもよい。例えば、膨張弁１３が、電子式膨張弁で構成された場合は、制御部６の指示に基づいて開度調整が行われる。 The expansion valve 13 is a throttle device that controls the flow rate of the refrigerant, and adjusts the pressure of the refrigerant by adjusting the flow rate of the refrigerant flowing through the refrigerant pipe 4 by changing the opening degree of the expansion valve 13. During the cooling operation, the expansion valve 13 expands the high-pressure liquid state refrigerant into the low-pressure gas-liquid two-phase state refrigerant to reduce the pressure. The expansion valve 13 is not limited to this, and an electronic expansion valve, a capillary tube, or the like may be used as long as the same effect can be obtained. For example, when the expansion valve 13 is composed of an electronic expansion valve, the opening degree is adjusted based on the instruction of the control unit 6.
　室内機２は、冷媒と室内空気との間で熱交換を行う室内熱交換器１４と、室内熱交換器１４が熱交換を行う空気の流れを調整する室内送風機１７と、を有する。 The indoor unit 2 includes an indoor heat exchanger 14 that exchanges heat between the refrigerant and the indoor air, and an indoor blower 17 that adjusts the flow of air that the indoor heat exchanger 14 exchanges heat with.
　室内熱交換器１４は、暖房運転時において凝縮器の働きをし、冷媒配管４ａ側から流入した冷媒と、室内空気と、の間で熱交換を行い、冷媒を凝縮させて液化させ、冷媒配管４ｂ側に流出させる。また、室内熱交換器１４は、冷房運転時において蒸発器として機能し、冷媒配管４ｂ側から流入した膨張弁１３によって低圧状態にされた冷媒と、室内空気と、の間で熱交換を行い、冷媒に空気の熱を奪わせて蒸発させて気化させ、冷媒配管４ａ側に流出させる。なお、ここでは室内空気を外部流体として用いる場合を例に説明したが、外部流体は室内空気を含む気体に限らず、水を含む液体であってもよい。 The indoor heat exchanger 14 acts as a condenser during the heating operation, exchanges heat between the refrigerant flowing in from the refrigerant pipe 4a side and the indoor air, condenses the refrigerant and liquefies it, and causes the refrigerant pipe. Let it flow out to the 4b side. Further, the indoor heat exchanger 14 functions as an evaporator during the cooling operation, and exchanges heat between the refrigerant brought into a low pressure state by the expansion valve 13 flowing in from the refrigerant pipe 4b side and the indoor air. The refrigerant takes heat from the air, evaporates it, vaporizes it, and causes it to flow out to the refrigerant pipe 4a side. Although the case where the indoor air is used as the external fluid has been described here as an example, the external fluid is not limited to the gas containing the indoor air and may be a liquid containing water.
　室内送風機１７の運転速度は、ユーザーの設定により決定される。室内送風機１７には、インバータ装置を取り付け、ファンモーター１８の運転周波数を変化させてファンの回転速度を変更することが好ましい。なお、室内送風機１７は、同様の効果が得られるものであればこれに限らず、例えば、ファンの種類はシロッコファンでもよいし、プラグファンでもよい。また、室内送風機１７は押し込み方式でもよいし、引っぱり方式でもよい。 The operating speed of the indoor blower 17 is determined by the user's setting. It is preferable to attach an inverter device to the indoor blower 17 and change the operating frequency of the fan motor 18 to change the rotation speed of the fan. The indoor blower 17 is not limited to this as long as the same effect can be obtained. For example, the type of fan may be a sirocco fan or a plug fan. Further, the indoor blower 17 may be a pushing type or a pulling type.
＜空気調和装置１の冷房および暖房運転の動作例＞
　次に、空気調和装置１の動作例として冷房運転の動作を説明する。圧縮機１０によって圧縮され吐出された高温高圧のガス冷媒は、流路切替装置１１を経由して、熱交換器１２に流入する。熱交換器１２に流入したガス冷媒は、室外送風機１５により送風される外気との熱交換により凝縮し、低温の冷媒となって、熱交換器１２から流出する。熱交換器１２から流出した冷媒は、膨張弁１３によって膨張および減圧され、低温低圧の気液二相冷媒となる。この気液二相冷媒は、室内機２の室内熱交換器１４に流入し、室内送風機１７により送風される室内空気との熱交換により蒸発し、低温低圧のガス冷媒となって室内熱交換器１４から流出する。このとき、冷媒に吸熱されて冷却された室内空気は、空調空気（吹出風）となって、室内機２から空調対象空間である室内に吹き出される。室内熱交換器１４から流出したガス冷媒は、流路切替装置１１を経由して圧縮機１０に吸入され、再び圧縮される。空気調和装置１の冷房運転は、以上の動作が繰り返される（図１中、実線の矢印で示す）。 <Operation example of cooling and heating operation of air conditioner 1>
Next, the operation of the cooling operation will be described as an operation example of the air conditioner 1. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 10 flows into the heat exchanger 12 via the flow path switching device 11. The gas refrigerant that has flowed into the heat exchanger 12 is condensed by heat exchange with the outside air blown by the outdoor blower 15, becomes a low-temperature refrigerant, and flows out of the heat exchanger 12. The refrigerant flowing out of the heat exchanger 12 is expanded and depressurized by the expansion valve 13 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. This gas-liquid two-phase refrigerant flows into the indoor heat exchanger 14 of the indoor unit 2, evaporates by heat exchange with the indoor air blown by the indoor blower 17, becomes a low-temperature low-pressure gas refrigerant, and becomes an indoor heat exchanger. Outflow from 14. At this time, the indoor air that has been cooled by being absorbed by the refrigerant becomes air-conditioned air (blown air) and is blown out from the indoor unit 2 into the room that is the air-conditioned space. The gas refrigerant flowing out of the indoor heat exchanger 14 is sucked into the compressor 10 via the flow path switching device 11 and is compressed again. In the cooling operation of the air conditioner 1, the above operation is repeated (indicated by the solid arrow in FIG. 1).
　次に、空気調和装置１の動作例として暖房運転の動作を説明する。圧縮機１０によって圧縮され吐出された高温高圧のガス冷媒は、流路切替装置１１を経由して、室内機２の室内熱交換器１４に流入する。室内熱交換器１４に流入したガス冷媒は、室内送風機１７により送風される室内空気との熱交換により凝縮し、低温の冷媒となって、室内熱交換器１４から流出する。このとき、ガス冷媒から熱を受け取り暖められた室内空気は、空調空気（吹出風）となって、室内機２から室内に吹き出される。室内熱交換器１４から流出した冷媒は、膨張弁１３によって膨張および減圧され、低温低圧の気液二相冷媒となる。この気液二相冷媒は、室外機３の熱交換器１２に流入し、室外送風機１５により送風される外気との熱交換により蒸発し、低温低圧のガス冷媒となって熱交換器１２から流出する。熱交換器１２から流出したガス冷媒は、流路切替装置１１を経由して圧縮機１０に吸入され、再び圧縮される。空気調和装置１の暖房運転は、以上の動作が繰り返される（図１中、破線の矢印で示す）。 Next, the operation of the heating operation will be described as an operation example of the air conditioner 1. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 10 flows into the indoor heat exchanger 14 of the indoor unit 2 via the flow path switching device 11. The gas refrigerant flowing into the indoor heat exchanger 14 is condensed by heat exchange with the indoor air blown by the indoor blower 17, becomes a low-temperature refrigerant, and flows out from the indoor heat exchanger 14. At this time, the indoor air that has been warmed by receiving heat from the gas refrigerant becomes conditioned air (blown air) and is blown out from the indoor unit 2 into the room. The refrigerant flowing out of the indoor heat exchanger 14 is expanded and depressurized by the expansion valve 13 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. This gas-liquid two-phase refrigerant flows into the heat exchanger 12 of the outdoor unit 3, evaporates by heat exchange with the outside air blown by the outdoor blower 15, becomes a low-temperature low-pressure gas refrigerant, and flows out from the heat exchanger 12. To do. The gas refrigerant flowing out of the heat exchanger 12 is sucked into the compressor 10 via the flow path switching device 11 and is compressed again. In the heating operation of the air conditioner 1, the above operation is repeated (indicated by the broken line arrow in FIG. 1).
＜室外機３＞
　ここで、図２および図３を参照しながら、本実施の形態１に係る空気調和装置１の室外機３について説明する。図２は、図１の空気調和装置１における室外機３の外観を示す斜視図である。図３は、図２の室外機３の構成を示す分解斜視図である。 <Outdoor unit 3>
Here, the outdoor unit 3 of the air conditioner 1 according to the first embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is a perspective view showing the appearance of the outdoor unit 3 in the air conditioner 1 of FIG. FIG. 3 is an exploded perspective view showing the configuration of the outdoor unit 3 of FIG.
　図２および図３に示すように、室外機３は、外郭を覆う筐体パネル３０が直方体形状で形成されている。筐体パネル３０の内部は、仕切板３１によって風路室３２と機械室３３とに区画されている。風路室３２における筐体パネル３０の前面側には、室外送風機１５が設置されている。また、風路室３２における室外送風機１５の背面側には、筐体パネル３０の風路室３２における背面側から側面側にかけてＬ字状に搭載される熱交換器１２が設置されている。 As shown in FIGS. 2 and 3, in the outdoor unit 3, the housing panel 30 covering the outer shell is formed in a rectangular parallelepiped shape. The inside of the housing panel 30 is divided into an air passage chamber 32 and a machine room 33 by a partition plate 31. An outdoor blower 15 is installed on the front side of the housing panel 30 in the air passage chamber 32. Further, on the back side of the outdoor blower 15 in the air passage chamber 32, a heat exchanger 12 mounted in an L shape from the back side to the side surface side of the air passage chamber 32 of the housing panel 30 is installed.
　筐体パネル３０は、前面上部外郭パネル３０ａ、前面下部外郭パネル３０ｂ、背面上部外郭パネル３０ｃ、背面下部外郭パネル３０ｄ、天面外郭パネル３０ｅ、側面外郭パネル３０ｆおよび前面パネル３０ｇによって構成されている。また、筐体パネル３０は、仕切板３１と共に風路室３２の側面四面および機械室３３の側面四面を囲っている。なお、前述した機械室３３の筐体パネル３０の構成は一例であり、筐体パネル３０の部品点数または継ぎ目の位置等は限定しない。例えば、前面上部外郭パネル３０ａと前面下部外郭パネル３０ｂとを一体化した前面外郭パネルを用いた室外機３であってもよい。 The housing panel 30 is composed of a front upper outer panel 30a, a front lower outer panel 30b, a back upper outer panel 30c, a back lower lower outer panel 30d, a top outer panel 30e, a side outer panel 30f, and a front panel 30g. Further, the housing panel 30 surrounds the four side surfaces of the air passage chamber 32 and the four side surfaces of the machine room 33 together with the partition plate 31. The configuration of the housing panel 30 of the machine room 33 described above is an example, and the number of parts of the housing panel 30 or the position of the seam is not limited. For example, the outdoor unit 3 may be an outdoor unit 3 using a front outer panel in which the front upper outer panel 30a and the front lower outer panel 30b are integrated.
　室外送風機１５は、回転中心となるボス１５ａの外周に複数の翼１５ｂが設けられ、ファンモーター１６（図１参照）により回転駆動される。また、筐体パネル３０における室外送風機１５の前面側に位置する前面パネル３０ｇには、筐体パネル３０の内部の空気を当該筐体パネル３０の外部へと排出するためのスリット状の吹出口３０ｈが設けられている。 The outdoor blower 15 is provided with a plurality of blades 15b on the outer periphery of the boss 15a, which is the center of rotation, and is rotationally driven by a fan motor 16 (see FIG. 1). Further, the front panel 30g located on the front side of the outdoor blower 15 in the housing panel 30 has a slit-shaped outlet 30h for discharging the air inside the housing panel 30 to the outside of the housing panel 30. Is provided.
　機械室３３には、熱交換器１２と冷媒配管４（図１参照）を介して接続され、当該熱交換器１２へと冷媒を供給する圧縮機１０が設置されている。圧縮機１０には、当該圧縮機１０の表面温度を検知する過熱保護装置として機能するサーマルプロテクタが取り付けられていてもよい。また、機械室３３には、室外機３の運転有無を検知する電流センサーをはじめ、パワーモジュールおよびインバータ基板等の電気部品が設置されている。 In the machine room 33, a compressor 10 is installed which is connected to the heat exchanger 12 via a refrigerant pipe 4 (see FIG. 1) and supplies the refrigerant to the heat exchanger 12. The compressor 10 may be equipped with a thermal protector that functions as an overheat protection device that detects the surface temperature of the compressor 10. Further, in the machine room 33, electric parts such as a power module and an inverter board are installed, including a current sensor that detects whether or not the outdoor unit 3 is operating.
＜熱交換器１２＞
　次に、図４～図１１を参照しながら、本実施の形態１における熱交換器１２について説明する。図４は、図２の室外機３に用いられる熱交換器１２の構成を示す斜視図である。図５は、図４の熱交換器１２における要部を拡大して示す斜視図である。図６は、図５の熱交換器１２における扁平形状継手２０の構成を示す斜視図である。図７は、図６の扁平形状継手２０における継手部材２１の構成を示す斜視図である。図８は、図７の継手部材２１における変形例の構成を示す斜視図である。図９は、図７の継手部材２１における変形例の構成を示す斜視図である。図１０は、図７の継手部材２１における変形例の構成を示す斜視図である。図１１は、図７の継手部材２１における変形例の構成を示す斜視図である。 <Heat exchanger 12>
Next, the heat exchanger 12 according to the first embodiment will be described with reference to FIGS. 4 to 11. FIG. 4 is a perspective view showing the configuration of the heat exchanger 12 used in the outdoor unit 3 of FIG. FIG. 5 is an enlarged perspective view showing a main part of the heat exchanger 12 of FIG. FIG. 6 is a perspective view showing the configuration of the flat joint 20 in the heat exchanger 12 of FIG. FIG. 7 is a perspective view showing the configuration of the joint member 21 in the flat joint 20 of FIG. FIG. 8 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. 7. FIG. 9 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. 7. FIG. 10 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. 7. FIG. 11 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. 7.
　なお、以下の説明において、図７～図１１では扁平形状継手２０を構成する継手部材２１および２２のうちの一方の継手部材２１のみを図示して説明するが、これは他方の継手部材２２も同様に構成されているため、便宜上、割愛するものである。すなわち、詳細は後述するが、扁平形状継手２０を構成する継手部材２１および２２は、同一形状からなる。そして、これら継手部材２１および２２は、互いに対向して重ね合わせの状態で接合されることで、扁平形状継手２０を形成するものである。 In the following description, only one of the joint members 21 and 22 constituting the flat joint 20 will be illustrated and described in FIGS. 7 to 11, but this also includes the other joint member 22. Since they are configured in the same manner, they are omitted for convenience. That is, although the details will be described later, the joint members 21 and 22 constituting the flat joint 20 have the same shape. The joint members 21 and 22 are joined so as to face each other in a superposed state to form a flat joint 20.
　図４および図５に示すように、熱交換器１２は、冷媒を流通させる扁平形状の伝熱管である扁平管１２１と、扁平管１２１を流れる冷媒と外気との間の伝熱面積を大きくするためのフィン１２２と、を有する熱交換体１２０を並列に備えた構造を有している。すなわち、熱交換器１２は、２つの熱交換体１２０を有する、所謂、２列構造のフィンアンドチューブ型熱交換器として構成されている。本実施の形態１の場合、熱交換器１２は、搭載される室外機３（図２および図３参照）の形状に合わせて全体としてＬ字状に形成されている。 As shown in FIGS. 4 and 5, the heat exchanger 12 increases the heat transfer area between the flat tube 121, which is a flat heat transfer tube through which the refrigerant flows, and the refrigerant flowing through the flat tube 121 and the outside air. It has a structure in which a heat exchanger 120 having a fin 122 for the purpose is provided in parallel. That is, the heat exchanger 12 is configured as a so-called two-row structure fin-and-tube type heat exchanger having two heat exchangers 120. In the case of the first embodiment, the heat exchanger 12 is formed in an L shape as a whole according to the shape of the outdoor unit 3 (see FIGS. 2 and 3) to be mounted.
　フィン１２２は帯板状に成形され、鉛直方向の上下に伸長した状態で配置され、当該鉛直方向に直交する水平方向に間隔をあけて複数並んで設けられている。扁平管１２１は、横断面が扁平形状をなす多穴管構造をなし、水平方向に伸長した状態で配置され、鉛直方向の上下に間隔をあけて複数積層して設けられている。これら扁平管１２１は、それぞれフィン１２２に挿入し貫通した状態で接続されている。そして、扁平管１２１とフィン１２２とは、組み付け後にろう付により接合される。フィン材料は、ろう材層を有するクラッド材料である。フィン１２２は、心材となるアルミニウム合金よりも融点が低いアルミニウム合金をろう材層として、心材と共にクラッドされている。扁平管１２１とフィン１２２とは、組み付けた後、接合するため加熱される。また、フィン材料がベア材で、扁平管１２１側にろう材を塗装したものを用い、同様に加熱して接合してもよい。あるいは、フィン材料がベア材で、扁平管１２１側にもろう材を持たせず、フィン１２２と扁平管１２１とを組み付け後、棒状のろう材を置きろうする、またはペーストろうを塗布することによって、ろう材を供給し、同様に加熱して接合する方法もある。 The fins 122 are formed in a strip shape and are arranged in a state of being vertically extended in the vertical direction, and a plurality of fins 122 are provided side by side at intervals in the horizontal direction orthogonal to the vertical direction. The flat pipe 121 has a multi-hole pipe structure having a flat cross section, is arranged in a horizontally extended state, and is provided by stacking a plurality of flat pipes 121 at intervals in the vertical direction. Each of these flat tubes 121 is inserted into the fin 122 and connected in a penetrating state. Then, the flat tube 121 and the fin 122 are joined by brazing after assembly. The fin material is a clad material having a brazing filler metal layer. The fin 122 is clad together with the core material by using an aluminum alloy having a melting point lower than that of the aluminum alloy as the core material as a brazing material layer. After assembling, the flat tube 121 and the fin 122 are heated for joining. Further, the fin material may be a bare material, and the flat tube 121 side coated with a brazing material may be used and similarly heated and joined. Alternatively, the fin material is a bare material, the flat tube 121 side does not have a brazing material, and after assembling the fin 122 and the flat tube 121, a rod-shaped brazing material is placed or a paste brazing material is applied. , There is also a method of supplying a brazing material and heating it in the same manner for joining.
　ここで、扁平管１２１は、伸長方向に垂直な横断面が長円形の扁平形状を有しており、短辺側が円弧状に形成され、長辺側が平面状に形成された外形により構成されている。扁平管１２１は、多穴管構造で構成されることにより、円管形状の伝熱管に比べて伝熱管内面と冷媒との接触面積が増えるため熱交換効率に優れている。扁平管１２１の材料は、主としてアルミニウムあるいはアルミニウム合金であり、押し出し成形または引き抜き成形等の加工方法により成形される。扁平形状の断面を有する扁平管１２１は、腐食が進展すると孔食が発生する。そのため、扁平管１２１の外側面には、孔食の発生に伴う管内冷媒の漏れを防止するべく、亜鉛溶射を施すなどの手法を用いて犠牲陽極層が形成されていることが望ましい。 Here, the flat tube 121 has a flat shape having an oval cross section perpendicular to the extension direction, and is composed of an outer shape in which the short side is formed in an arc shape and the long side is formed in a flat shape. There is. Since the flat tube 121 has a multi-hole tube structure, the contact area between the inner surface of the heat transfer tube and the refrigerant increases as compared with the circular tube-shaped heat transfer tube, so that the flat tube 121 is excellent in heat exchange efficiency. The material of the flat tube 121 is mainly aluminum or an aluminum alloy, and is formed by a processing method such as extrusion molding or pultrusion molding. Pitting corrosion occurs in the flat tube 121 having a flat cross section as corrosion progresses. Therefore, it is desirable that a sacrificial anode layer is formed on the outer surface of the flat tube 121 by using a technique such as zinc spraying in order to prevent leakage of the refrigerant in the tube due to the occurrence of pitting corrosion.
　本実施の形態１の場合、室外送風機１５（図３参照）から供給される風の上流側に配置される熱交換体１２０と、下流側に配置される熱交換体１２０とで、当該風の流れに対して扁平管１２１が交差しないように、各扁平管１２１は互い違いに配置されている。つまり、上流側の熱交換体１２０の扁平管１２１と、下流側の熱交換体１２０の扁平管１２１とが、上下方向において交互に配置されている。これにより、どの扁平管１２１にも均一に風が供給されることで、熱交換効率の低下を防止している。 In the case of the first embodiment, the heat exchanger 120 arranged on the upstream side of the wind supplied from the outdoor blower 15 (see FIG. 3) and the heat exchanger 120 arranged on the downstream side of the wind The flat tubes 121 are staggered so that the flat tubes 121 do not intersect the flow. That is, the flat tubes 121 of the heat exchanger 120 on the upstream side and the flat tubes 121 of the heat exchanger 120 on the downstream side are alternately arranged in the vertical direction. As a result, the wind is uniformly supplied to all the flat tubes 121, thereby preventing the heat exchange efficiency from being lowered.
　図５に拡大して示す熱交換器１２における要部としての扁平管１２１の端部は、扁平形状継手２０を介して円管１２３と接続されることで、円管形状へと変換されている。円管１２３から先には、分配器１２５およびヘッダ１２６等の分配回路が接続されている。分配器１２５は各扁平管１２１へ冷媒を分配し、ヘッダ１２６は冷媒を集める機能を有する。また、上下に交互に配置された上流側の熱交換体１２０の扁平管１２１と、下流側の熱交換体１２０の扁平管１２１とは、Ｕベンド管１２４を介して接続されている。このＵベンド管１２４は、横断面が円形状の配管がＵ字状に屈曲されてなるものである。 The end of the flat tube 121 as a main part in the heat exchanger 12 enlarged in FIG. 5 is converted into a circular tube shape by being connected to the circular tube 123 via the flat joint 20. .. A distribution circuit such as a distributor 125 and a header 126 is connected to the circular tube 123. The distributor 125 distributes the refrigerant to each flat tube 121, and the header 126 has a function of collecting the refrigerant. Further, the flat tubes 121 of the heat exchanger 120 on the upstream side and the flat tubes 121 of the heat exchanger 120 on the downstream side, which are alternately arranged vertically, are connected to each other via the U bend tube 124. The U-bend pipe 124 is formed by bending a pipe having a circular cross section into a U shape.
　ここで、扁平形状継手２０は、図６に示すように、扁平管１２１の軸中心で且つ扁平形状の長辺に沿った縦断面で分割された少なくとも２つの継手部材２１および２２を有して構成される。また、扁平形状継手２０は、一端側に扁平管１２１に対応した第一の差込口２０ａが形成されていると共に、他端側に円管１２３に対応した第二の差込口２０ｂが形成されている。そして、扁平形状継手２０は、同一形状からなる２つの継手部材２１および２２の間に扁平管１２１と円管１２３とを介在した状態で、これら継手部材２１および２２をモナカ状に対向させて重ね合わせ、ろう付によって接合することで形成される。 Here, as shown in FIG. 6, the flat joint 20 has at least two joint members 21 and 22 divided in a vertical cross section at the axial center of the flat pipe 121 and along the long side of the flat shape. It is composed. Further, in the flat joint 20, a first insertion port 20a corresponding to the flat pipe 121 is formed on one end side, and a second insertion port 20b corresponding to the circular pipe 123 is formed on the other end side. Has been done. Then, in the flat joint 20, the flat pipe 121 and the circular pipe 123 are interposed between two joint members 21 and 22 having the same shape, and the joint members 21 and 22 are stacked so as to face each other in a monaca shape. It is formed by joining together and joining by brazing.
　なお、継手部材２１には、継手部材２２との対向する部位に、継手部材２１および２２の接合の際の位置合わせのための係合突出部２３および２４と、係合穴部２５および２６とが形成されている。ここでは図示省略するが、継手部材２２も継手部材２１と同様に構成されている。したがって、継手部材２１と継手部材２２とを対向して重ね合わせた場合、継手部材２１の係合突出部２３および継手部材２２の係合穴部２５と、継手部材２１の係合突出部２４および継手部材２２の係合穴部２６とが係合する。同様に、継手部材２１の係合穴部２５および継手部材２２の係合突出部２３と、継手部材２１の係合穴部２６および継手部材２２の係合突出部２４とが係合する。これにより、継手部材２１と継手部材２２とを対向させて重ね合わせる際、容易且つ正確に位置合わせができるようになっている。 The joint member 21 includes engaging protrusions 23 and 24 for alignment when the joint members 21 and 22 are joined, and engaging holes 25 and 26 at portions facing the joint member 22. Is formed. Although not shown here, the joint member 22 is also configured in the same manner as the joint member 21. Therefore, when the joint member 21 and the joint member 22 are overlapped with each other facing each other, the engaging protrusion 23 of the joint member 21, the engaging hole 25 of the joint member 22, and the engaging protruding portion 24 of the joint member 21 and The engaging hole 26 of the joint member 22 engages. Similarly, the engaging hole 25 of the joint member 21 and the engaging protruding portion 23 of the joint member 22 are engaged with the engaging hole 26 of the joint member 21 and the engaging protruding portion 24 of the joint member 22. As a result, when the joint member 21 and the joint member 22 face each other and are overlapped with each other, the alignment can be easily and accurately performed.
　図７に示すように、継手部材２１において、その第一の差込口２０ａ側における扁平管１２１の接合面であるろう付箇所には、ろう付の際に溶融したろう材を集めるろう材貯留部２１ａが形成されている。なお、継手部材２１と図６に示す継手部材２２とは、同一形状からなるが、ろう材貯留部２１ａは、継手部材２１および２２のいずれか一方のろう付箇所に設けてもよいし、継手部材２１および２２の双方のろう付箇所に設けてもよい。また、ろう材貯留部２１ａは、扁平管１２１に向かって開口された凹部として形成され、この凹部が第一の差込口２０ａの開口に対して平行、且つ、線状に連続して配置された溝部として形成されることで構成される。このとき、ろう材貯留部２１ａは、継手部材２１の第一の差込口２０ａ側における開口端部からの距離が、当該第一の差込口２０ａに挿入された扁平管１２１の端部からの距離よりも短い位置に配置される。 As shown in FIG. 7, in the joint member 21, the brazed material that collects the brazed material melted at the time of brazing is stored in the brazed portion which is the joint surface of the flat pipe 121 on the first insertion port 20a side. The portion 21a is formed. The joint member 21 and the joint member 22 shown in FIG. 6 have the same shape, but the brazing material storage portion 21a may be provided at the brazed portion of either the joint member 21 or 22 or the joint. It may be provided at the brazed portion of both the members 21 and 22. Further, the brazing filler metal storage portion 21a is formed as a recess opened toward the flat pipe 121, and the recess is arranged parallel to the opening of the first insertion port 20a and continuously linearly. It is formed by being formed as a groove. At this time, in the brazing filler metal storage portion 21a, the distance from the opening end portion on the first insertion port 20a side of the joint member 21 is from the end portion of the flat pipe 121 inserted into the first insertion port 20a. It is placed at a position shorter than the distance of.
　このような構成のろう材貯留部２１ａでは、毛細管現象によりろう付の際に溶融したろう材がろう材貯留部２１ａ内へ流れ込み留まることができ、ボイドの発生を防止したい箇所にろう材を行き亘らせることが可能となる。したがって、ろう付箇所において、ろう材の供給不足によるボイドの発生を抑制できる。なお、ろう材貯留部２１ａろ配置する位置を規定することで、扁平管１２１内へのろう材の流入を抑制し、ろう詰まりを未然に防止することも可能となる。 In the brazing material storage section 21a having such a configuration, the brazing material melted during brazing can flow and stay in the brazing material storage section 21a due to the capillary phenomenon, and the brazing material is placed at a place where voids are to be prevented from being generated. It is possible to braze. Therefore, it is possible to suppress the generation of voids due to insufficient supply of brazing material at the brazed portion. By defining the position where the brazing filler metal storage portion 21a is arranged, it is possible to suppress the inflow of the brazing filler metal into the flat tube 121 and prevent the brazing filler metal from clogging.
　ろう材貯留部２１ａを形成する手法としては、プレス時に凹部を同時成形するか、プレス成形後に切り欠きを入れることで形成できる。加工の方法により、ろう付箇所表面の凹部の断面形状は半円形状、三角形状または矩形形状等の様々な形態となり、どの構成においても一定の効果が得られる。 As a method for forming the brazing filler metal storage portion 21a, it can be formed by simultaneously forming a recess during pressing or by making a notch after press forming. Depending on the processing method, the cross-sectional shape of the concave portion on the surface of the brazed portion has various forms such as a semicircular shape, a triangular shape, or a rectangular shape, and a certain effect can be obtained in any configuration.
　また、扁平形状継手２０を構成する継手部材２１は、第一の差込口２０ａと第二の差込口２０ｂとの間に、ろう材が扁平管１２１または円管１２３内への流入することによって、ろう詰まりを生じることを未然に防止するための逃げ部２０ｃが形成されている。扁平形状継手２０の逃げ部２０ｃは、第一の差込口２０ａおよび第二の差込口２０ｂよりも外方に向けた膨らみが大きい。なお、逃げ部２０ｃは、継手部材２１と同一形状の継手部材２２（図６参照）にも設けられている。 Further, in the joint member 21 constituting the flat joint 20, the brazing material flows into the flat pipe 121 or the circular pipe 123 between the first insertion port 20a and the second insertion port 20b. As a result, a relief portion 20c is formed to prevent the occurrence of wax clogging. The relief portion 20c of the flat joint 20 has a larger bulge toward the outside than the first insertion port 20a and the second insertion port 20b. The relief portion 20c is also provided in the joint member 22 (see FIG. 6) having the same shape as the joint member 21.
　なお、ここでは、上述のように、扁平形状継手２０を構成する継手部材２１および２２の一方または双方のろう付箇所に、ろう材貯留部２１ａが第一の差込口２０ａの開口に対して平行、且つ、線状に連続して配置された溝部として形成される場合について述べた。しかし、ろう材貯留部２１ａの形状および配置としてはこれに限ることはない。すなわち、ろう材貯留部２１ａは、部分的な凹部状態で形成されてもよいし、線状的な溝部状態で形成されてもよい。 Here, as described above, the brazing material storage portion 21a is provided at the brazed portion of one or both of the joint members 21 and 22 constituting the flat joint 20 with respect to the opening of the first insertion port 20a. The case where the groove portions are formed in parallel and continuously arranged linearly has been described. However, the shape and arrangement of the brazing filler metal storage portion 21a is not limited to this. That is, the brazing filler metal storage portion 21a may be formed in a partially recessed state or may be formed in a linear grooved state.
　具体的に、ろう材貯留部２１ａは、例えば、図７との対応部分に同一符号を付した図８に示すように、第一の差込口２０ａの開口に対して平行、且つ、線状に連続した溝部状態で、第一の差込口２０ａの開口に対して複数並列に配置するようにしてもよい。これにより、ろう材貯留部２１ａにおける外気に接触する側と、冷媒と接触する側と、の両側面において、フィレットを形成することが可能となり、ボイドの発生位置をろう付箇所中央にコントロールもしくは排除することができる。よって、外側にフィレットを形成することで、耐圧はもとより、腐食または疲労耐力等の向上を促進することができる。 Specifically, the brazing filler metal storage portion 21a is parallel and linear with respect to the opening of the first insertion port 20a, for example, as shown in FIG. 8 in which the portion corresponding to FIG. 7 is designated by the same reference numeral. A plurality of portions may be arranged in parallel with respect to the opening of the first insertion port 20a in a state of continuous grooves. As a result, fillets can be formed on both side surfaces of the brazing material storage portion 21a on the side that comes into contact with the outside air and the side that comes into contact with the refrigerant, and the position where voids are generated can be controlled or eliminated at the center of the brazing part. can do. Therefore, by forming the fillet on the outside, it is possible to promote not only the pressure resistance but also the improvement of corrosion or fatigue resistance.
　また、同じく図７との対応部分に同一符号を付した図９に示すように、ろう材貯留部２１ａは、第一の差込口２０ａの開口に対して平行、且つ、線状に断続して、すなわち破線状に配置された溝部として形成するようにしてもよい。この場合においても、前述した実施の形態１と同様の効果を奏することができる。 Further, as shown in FIG. 9, which also has the same reference numerals as those corresponding to those in FIG. 7, the brazing material storage portion 21a is parallel to the opening of the first insertion port 20a and intermittently and linearly. That is, it may be formed as a groove portion arranged in a broken line shape. Even in this case, the same effect as that of the first embodiment described above can be obtained.
　また、図７との対応部分に同一符号を付した図１０に示すように、ろう材貯留部２１ａは、第一の差込口２０ａの開口に対して平行、且つ、同一線上に間隔をあけて配置された線状の溝部として形成するようにしてもよい。これにより、特にろう材が回りにくい箇所に、ろう材を集約することが可能となる。図１０では、ろう付箇所の中央を除く両端にろう材貯留部２１ａを設けるように構成しているが、中央部分だけろう材貯留部２１ａを形成するなど、その他の構成でも一定の効果が得られる。 Further, as shown in FIG. 10 in which the corresponding portions corresponding to those in FIG. 7 are designated by the same reference numerals, the brazing filler metal storage portions 21a are parallel to the opening of the first insertion port 20a and are spaced on the same line. It may be formed as a linear groove portion arranged in a row. This makes it possible to concentrate the brazing material in a place where the brazing material is particularly difficult to rotate. In FIG. 10, the brazing material storage portions 21a are provided at both ends except the center of the brazed portion, but a certain effect can be obtained with other configurations such as forming the brazing material storage portion 21a only in the central portion. Will be brazed.
　さらに、ろう材貯留部２１ａは、図７との対応部分に同一符号を付した図１１に示すように、第一の差込口２０ａの開口に向かって放射状に配置された複数の溝部として形成されてもよい。これにより、冷媒流れ方向に対して、凝固したろう材を配置することが可能となる。よって、ろう材貯留部２１ａにおける外気に接触する側と、冷媒と接触する側と、の両側面において、フィレットを形成することが可能となり、ボイドの発生位置を中央にコントロールもしくは排除することが可能となる。図１１では、放射状のろう材貯留部２１ａを３本配置する場合について図示しているが、ろう付時のろう材の供給量またはろう付箇所の形状により、複数本設ければ一定の効果は得られる。 Further, the brazing filler metal storage portion 21a is formed as a plurality of groove portions radially arranged toward the opening of the first insertion port 20a, as shown in FIG. 11 in which the corresponding portions corresponding to those in FIG. 7 are designated by the same reference numerals. May be done. This makes it possible to dispose the solidified brazing material in the direction of the refrigerant flow. Therefore, it is possible to form fillets on both side surfaces of the brazing filler metal storage portion 21a on the side that comes into contact with the outside air and the side that comes into contact with the refrigerant, and it is possible to control or eliminate the void generation position in the center. It becomes. FIG. 11 shows a case where three radial brazing material storage portions 21a are arranged, but depending on the amount of brazed material supplied at the time of brazing or the shape of the brazed part, a certain effect can be obtained if a plurality of the brazing material storage portions are provided. can get.
＜実施の形態１における効果＞
　以上、説明したように、本実施の形態１の熱交換器１２およびそれを用いた空気調和装置１によれば、扁平管１２１と円管１２３とを接続する扁平形状継手２０において、当該扁平形状継手２０を構成する継手部材２１および２２の一方または双方のろう付箇所にろう材貯留部２１ａを設けるようにした。これにより、ろう材貯留部２１ａに、ろう付の際に溶融したろう材を集め、留めることで、ろう付時にろう材が必要となるろう付箇所にろう材を十分に行き亘らせることができ、ろう材の供給不足によるボイドの発生を抑制できる。 <Effect in Embodiment 1>
As described above, according to the heat exchanger 12 of the first embodiment and the air conditioner 1 using the heat exchanger 12, the flat shape joint 20 connecting the flat pipe 121 and the circular pipe 123 has the flat shape. The brazing material storage portion 21a is provided at one or both brazing points of the joint members 21 and 22 constituting the joint 20. As a result, by collecting and fastening the brazed material melted during brazing in the brazing material storage portion 21a, the brazing material can be sufficiently distributed to the brazing place where the brazing material is required at the time of brazing. It is possible to suppress the generation of voids due to insufficient supply of brazing material.
実施の形態２．
　次に、図１２～図１４を参照しながら、実施の形態２に係る熱交換器１２の扁平形状継手２０について説明する。図１２は、実施の形態２に係る熱交換器１２の扁平形状継手２０における継手部材２１の構成を示す斜視図である。図１３は、図１２の継手部材２１における変形例の構成を示す斜視図である。図１４は、図１２の継手部材２１における変形例の構成を示す斜視図である。なお、本実施の形態２においても、前述した実施の形態１と同様、扁平形状継手２０における継手部材２１についてのみ図示して説明するが、これは、継手部材２２も継手部材２１と同一形状をなすため、便宜上、割愛するものである。 Embodiment 2.
Next, the flat joint 20 of the heat exchanger 12 according to the second embodiment will be described with reference to FIGS. 12 to 14. FIG. 12 is a perspective view showing the configuration of the joint member 21 in the flat joint 20 of the heat exchanger 12 according to the second embodiment. FIG. 13 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. FIG. 14 is a perspective view showing a configuration of a modified example of the joint member 21 of FIG. In the second embodiment as well, as in the first embodiment described above, only the joint member 21 in the flat joint 20 will be illustrated and described, but the joint member 22 also has the same shape as the joint member 21. Therefore, it is omitted for convenience.
　図７との対応部分に同一符号を付した図１２に示すように、実施の形態２のろう材貯留部２１ａは、継手部材２１の第一の差込口２０ａ側における扁平管１２１のろう付箇所に、当該継手部材２１の表裏を貫通した貫通孔として形成される。これにより、ろう付の際に溶融したろう材と、ろう材の働きを活性化させるためのフラックス材の抜け穴が形成されることとなる。よって、ろう材が凝固する前の、活性化が終了し不要となったフラックス材をろう付箇所に形成したろう材貯留部２１ａから抜くことが可能となり、ろう材も貫通孔周辺に集まることから、ボイド発生を抑制することが可能となる。なお、貫通孔状態のろう材貯留部２１ａを形成する加工の方法としては、実施の形態１と同様に、プレス時に穴をあけるか、プレス後に孔加工を施すか等で形成である。 As shown in FIG. 12 in which the corresponding portions corresponding to those in FIG. 7 are designated by the same reference numerals, the brazing material storage portion 21a of the second embodiment is the brazing of the flat pipe 121 on the first insertion port 20a side of the joint member 21. It is formed as a through hole penetrating the front and back surfaces of the joint member 21 at the location. As a result, a loophole of the brazing material melted at the time of brazing and the flux material for activating the function of the brazing material is formed. Therefore, before the brazing material solidifies, the flux material that has been activated and is no longer needed can be removed from the brazing material storage portion 21a formed at the brazed portion, and the brazing material also collects around the through hole. , It becomes possible to suppress the generation of voids. As a method of processing to form the brazing material storage portion 21a in the through-hole state, it is formed by making a hole at the time of pressing, performing hole processing after pressing, or the like, as in the first embodiment.
　なお、貫通孔状態のろう材貯留部２１ａは、一つに限らず、ろう付箇所に複数形成されていてもよい。例えば、図１２との対応部分に同一符号を付した図１３に示すように、継手部材２１のろう付箇所において、ろう材貯留部２１ａを複数（この場合、２つ）形成するようにしてもよい。これにより、ろう付の際に溶融したろう材とフラックス材とが抜けるろう材貯留部２１ａを、凝固したろう材が必要な箇所に配置可能となり、ボイド発生を抑制することが可能となる。 The brazed material storage portion 21a in the through-hole state is not limited to one, and a plurality of brazed material storage portions 21a may be formed at the brazed portion. For example, as shown in FIG. 13 in which the corresponding portions corresponding to those in FIG. 12 are designated by the same reference numerals, a plurality (two in this case) of brazed material storage portions 21a may be formed at the brazed portion of the joint member 21. Good. As a result, the brazing material storage portion 21a from which the molten brazing material and the flux material are removed during brazing can be arranged at a position where the solidified brazing material is required, and it becomes possible to suppress the generation of voids.
　また、図１２との対応部分に同一符号を付した図１４に示すように、複数の貫通孔からなるろう材貯留部２１ａを、２つの継手部材２１および２２における双方のろう付箇所において、それぞれ第一の差込口２０ａおよび継手部材２１および２２の中央から同一方向、且つ、同一位置に配置するようにしてもよい。この場合、複数のろう材貯留部２１ａは、２つの継手部材２１および２２を互いに対向させて重ね合わせた際に、互い違いの位置となるように配置される。これにより、ろう付の際に溶融したろう材と、フラックス材との抜け穴としてのろう材貯留部２１ａを、凝固したろう材が必要な箇所に無駄なく配置可能となり、ボイド発生をより抑制することが可能となる。 Further, as shown in FIG. 14 in which the corresponding portions corresponding to those in FIG. 12 are designated by the same reference numerals, brazed material storage portions 21a composed of a plurality of through holes are provided at both brazed portions of the two joint members 21 and 22, respectively. It may be arranged in the same direction and at the same position from the center of the first insertion port 20a and the joint members 21 and 22. In this case, the plurality of brazing filler metal storage portions 21a are arranged so as to be in staggered positions when the two joint members 21 and 22 are overlapped with each other facing each other. As a result, the brazing material storage portion 21a as a loophole between the brazing material melted at the time of brazing and the flux material can be arranged at a place where the solidified brazing material is required without waste, and the generation of voids can be further suppressed. Is possible.
＜実施の形態２における効果＞
　以上、説明したように、本実施の形態２の熱交換器１２およびそれを用いた空気調和装置１によれば、扁平管１２１と円管１２３とを接続する扁平形状継手２０において、当該扁平形状継手２０を構成する継手部材２１および２２の一方または双方のろう付箇所にろう材貯留部２１ａを貫通孔として設けるようにした。これにより、ろう材貯留部２１ａに、ろう付の際に溶融したろう材と、フラックス材とをろう付箇所から抜くことができ、凝固したろう材が必要な箇所に無駄なく配置可能となる。よって、ろう材の供給不足によるボイドの発生を抑制できる。 <Effect in Embodiment 2>
As described above, according to the heat exchanger 12 of the second embodiment and the air conditioner 1 using the heat exchanger 12, the flat shape joint 20 connecting the flat pipe 121 and the circular pipe 123 has the flat shape. A brazing material storage portion 21a is provided as a through hole in one or both brazed portions of the joint members 21 and 22 constituting the joint 20. As a result, the brazed material melted at the time of brazing and the flux material can be removed from the brazed portion in the brazing material storage portion 21a, and the solidified brazing material can be arranged in the required portion without waste. Therefore, the generation of voids due to insufficient supply of brazing material can be suppressed.
　１　空気調和装置、２　室内機、３　室外機、４　冷媒配管、４ａ　冷媒配管、４ｂ　冷媒配管、５　冷媒回路、６　制御部、１０　圧縮機、１１　流路切替装置、１２　熱交換器、１３　膨張弁、１４　室内熱交換器、１５　室外送風機、１５ａ　ボス、１５ｂ　翼、１６　ファンモーター、１７　室内送風機、１８　ファンモーター、２０　扁平形状継手、２０ａ　第一の差込口、２０ｂ　第二の差込口、２０ｃ　逃げ部、２１　継手部材、２１ａ　ろう材貯留部、２２　継手部材、２３　係合突出部、２４　係合突出部、２５　係合穴部、２６　係合穴部、３０　筐体パネル、３０ａ　前面上部外郭パネル、３０ｂ　前面下部外郭パネル、３０ｃ　背面上部外郭パネル、３０ｄ　背面下部外郭パネル、３０ｅ　天面外郭パネル、３０ｆ　側面外郭パネル、３０ｇ　前面パネル、３０ｈ　吹出口、３１　仕切板、３２　風路室、３３　機械室、１２０　熱交換体、１２１　扁平管、１２２　フィン、１２３　円管、１２４　Ｕベンド管、１２５　分配器、１２６　ヘッダ。 1 air conditioner, 2 indoor unit, 3 outdoor unit, 4 refrigerant piping, 4a refrigerant piping, 4b refrigerant piping, 5 refrigerant circuit, 6 control unit, 10 compressor, 11 flow path switching device, 12 heat exchanger, 13 expansion Valve, 14 indoor heat exchanger, 15 outdoor blower, 15a boss, 15b wing, 16 fan motor, 17 indoor blower, 18 fan motor, 20 flat joint, 20a first outlet, 20b second outlet , 20c relief part, 21 joint member, 21a brazing material storage part, 22 joint member, 23 engagement protrusion, 24 engagement protrusion, 25 engagement hole, 26 engagement hole, 30 housing panel, 30a front Upper outer panel, 30b front lower outer panel, 30c rear upper outer panel, 30d rear lower outer panel, 30e top outer panel, 30f side outer panel, 30g front panel, 30h air outlet, 31 partition plate, 32 air passage room, 33 Machine room, 120 heat exchanger, 121 flat pipe, 122 fin, 123 circular pipe, 124 U bend pipe, 125 distributor, 126 header.

Claims (10)

  1. 　横断面が扁平形状の伝熱管である扁平管と、横断面が円形状の円管と、前記円管と前記扁平管とを接続する扁平形状継手と、を備える熱交換器であって、
    　前記扁平形状継手は、
    　前記扁平管の軸中心で且つ前記扁平形状の長辺に沿った縦断面で分割された少なくとも２つの継手部材を有し、
    　前記２つの継手部材の間に前記扁平管と前記円管とを介在した状態で、ろう付によって接合されてなり、
    　一端側に前記扁平管に対応した第一の差込口が形成されていると共に、
    　他端側に前記円管に対応した第二の差込口が形成されており、
    　前記２つの継手部材における少なくとも一方の前記第一の差込口側における前記扁平管のろう付箇所には、前記ろう付の際に溶融したろう材を集めるろう材貯留部が形成されている、熱交換器。     A heat exchanger comprising a flat tube having a flat cross section, a circular tube having a circular cross section, and a flat joint connecting the circular tube and the flat tube.
    The flat joint
    It has at least two joint members at the axial center of the flat tube and divided by a longitudinal section along the long side of the flat shape.
    The flat pipe and the circular pipe are interposed between the two joint members and are joined by brazing.
    A first insertion port corresponding to the flat tube is formed on one end side, and at the same time,
    A second insertion port corresponding to the circular tube is formed on the other end side.
    A brazing material storage portion for collecting the brazed material melted at the time of brazing is formed at the brazed portion of the flat pipe on the brazing portion of at least one of the two joint members on the first insertion port side. Heat exchanger.
  2. 　前記ろう材貯留部は、
    　前記扁平管に向かって開口された凹部で形成される、請求項１に記載の熱交換器。     The brazing material storage part
    The heat exchanger according to claim 1, which is formed by a recess opened toward the flat tube.
  3. 　前記凹部は、
    　前記第一の差込口の開口に対して平行、且つ、線状に連続して配置された溝部として形成される、請求項２に記載の熱交換器。     The recess is
    The heat exchanger according to claim 2, wherein the heat exchanger is formed as a groove portion parallel to the opening of the first insertion port and continuously arranged linearly.
  4. 　前記凹部は、
    　前記第一の差込口の開口に対して平行、且つ、線状に断続して配置された溝部として形成される、請求項２に記載の熱交換器。     The recess is
    The heat exchanger according to claim 2, wherein the heat exchanger is formed as a groove portion arranged parallel to the opening of the first insertion port and intermittently arranged linearly.
  5. 　前記溝部は、
    　前記第一の差込口の開口に対して複数並列に配置される、請求項３または４に記載の熱交換器。     The groove is
    The heat exchanger according to claim 3 or 4, wherein a plurality of heat exchangers are arranged in parallel with respect to the opening of the first insertion port.
  6. 　前記凹部は、
    　前記第一の差込口の開口に向かって放射状に配置された複数の溝部として形成される、請求項２に記載の熱交換器。     The recess is
    The heat exchanger according to claim 2, wherein the heat exchanger is formed as a plurality of grooves radially arranged toward the opening of the first insertion port.
  7. 　前記ろう材貯留部は、
    　２つの前記継手部材における少なくとも一方の前記第一の差込口側における前記扁平管のろう付箇所に、当該継手部材の表裏を貫通して形成される一つまたは複数の貫通孔として形成される、請求項２に記載の熱交換器。     The brazing material storage part
    It is formed as one or a plurality of through holes formed through the front and back surfaces of the joint member at the brazed portion of the flat pipe on the brazed portion of at least one of the two joint members on the first insertion port side. , The heat exchanger according to claim 2.
  8. 　前記複数の貫通孔は、
    　２つの前記継手部材における双方の前記扁平管のろう付箇所において、
    　それぞれ前記第一の差込口および前記継手部材の中央から同一方向、且つ、同一位置に配置される、請求項７に記載の熱交換器。     The plurality of through holes
    At the brazed locations of both flat tubes in the two joint members
    The heat exchanger according to claim 7, which is arranged in the same direction and at the same position from the center of the first insertion port and the joint member, respectively.
  9. 　前記複数の貫通孔は、
    　２つの前記継手部材を互いに重ね合わせた際に、互い違いの位置に配置される、請求項８に記載の熱交換器。     The plurality of through holes
    The heat exchanger according to claim 8, wherein the two joint members are arranged at staggered positions when they are superposed on each other.
  10. 　熱交換器を備えた空気調和装置であって、
    　前記熱交換器として、請求項１～９のいずれか一項に記載の熱交換器を用いる、空気調和装置。     An air conditioner equipped with a heat exchanger
    An air conditioner that uses the heat exchanger according to any one of claims 1 to 9 as the heat exchanger.
PCT/JP2019/028977 2019-07-24 2019-07-24 Heat exchanger and air conditioning device using same WO2021014603A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021534477A JP7170881B2 (en) 2019-07-24 2019-07-24 Heat exchanger and air conditioner using the same
PCT/JP2019/028977 WO2021014603A1 (en) 2019-07-24 2019-07-24 Heat exchanger and air conditioning device using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/028977 WO2021014603A1 (en) 2019-07-24 2019-07-24 Heat exchanger and air conditioning device using same

Publications (1)

Publication Number Publication Date
WO2021014603A1 true WO2021014603A1 (en) 2021-01-28

Family

ID=74193631

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/028977 WO2021014603A1 (en) 2019-07-24 2019-07-24 Heat exchanger and air conditioning device using same

Country Status (2)

Country Link
JP (1) JP7170881B2 (en)
WO (1) WO2021014603A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022191106A1 (en) * 2021-03-09 2022-09-15 三菱電機株式会社 Partition member and heat exchanger

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49123953A (en) * 1973-03-27 1974-11-27
JPH0732133A (en) * 1993-07-20 1995-02-03 Zexel Corp Production of flat tube for heat exchanger
WO1996034245A1 (en) * 1995-04-26 1996-10-31 Helmut Lingemann Gmbh & Co. Flat tube with multiple cavities for heat exchangers and process for manufacturing the same
JP2004306133A (en) * 2003-03-25 2004-11-04 Calsonic Kansei Corp Heat exchanger tube and method for manufacturing the same
EP1748270A1 (en) * 2005-07-27 2007-01-31 Behr GmbH & Co. KG Heat exchanger
US7254026B2 (en) * 2005-11-18 2007-08-07 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Heat dissipation device with heat pipe
WO2016031500A1 (en) * 2014-08-27 2016-03-03 住友電工焼結合金株式会社 Braze joined article
JP2016038141A (en) * 2014-08-07 2016-03-22 三菱電機株式会社 Heat exchanger
WO2019031210A1 (en) * 2017-08-09 2019-02-14 住友電工焼結合金株式会社 Joined component

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS501957U (en) * 1973-05-04 1975-01-10
US20030131981A1 (en) * 2002-01-15 2003-07-17 Kohler Gregory T. Tank and cap assembly for use with microchannel tubing in a heat exchanger
JP2010185614A (en) * 2009-02-12 2010-08-26 Mitsubishi Electric Corp Flat pipe joint
JP5645852B2 (en) * 2012-01-12 2014-12-24 三菱電機株式会社 Pipe joint, heat exchanger, and heat exchanger manufacturing method
JP2016095083A (en) * 2014-11-14 2016-05-26 株式会社ケーヒン・サーマル・テクノロジー Heat exchanger
JP2016138731A (en) * 2015-01-29 2016-08-04 三菱電機株式会社 Heat exchanger
JP2017198403A (en) * 2016-04-28 2017-11-02 三菱電機株式会社 Flat pipe heat exchanger and method of manufacturing the same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49123953A (en) * 1973-03-27 1974-11-27
JPH0732133A (en) * 1993-07-20 1995-02-03 Zexel Corp Production of flat tube for heat exchanger
WO1996034245A1 (en) * 1995-04-26 1996-10-31 Helmut Lingemann Gmbh & Co. Flat tube with multiple cavities for heat exchangers and process for manufacturing the same
JP2004306133A (en) * 2003-03-25 2004-11-04 Calsonic Kansei Corp Heat exchanger tube and method for manufacturing the same
EP1748270A1 (en) * 2005-07-27 2007-01-31 Behr GmbH & Co. KG Heat exchanger
US7254026B2 (en) * 2005-11-18 2007-08-07 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Heat dissipation device with heat pipe
JP2016038141A (en) * 2014-08-07 2016-03-22 三菱電機株式会社 Heat exchanger
WO2016031500A1 (en) * 2014-08-27 2016-03-03 住友電工焼結合金株式会社 Braze joined article
WO2019031210A1 (en) * 2017-08-09 2019-02-14 住友電工焼結合金株式会社 Joined component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022191106A1 (en) * 2021-03-09 2022-09-15 三菱電機株式会社 Partition member and heat exchanger

Also Published As

Publication number Publication date
JP7170881B2 (en) 2022-11-14
JPWO2021014603A1 (en) 2021-12-16

Similar Documents

Publication Publication Date Title
JP4827882B2 (en) Heat exchanger module, heat exchanger, indoor unit and air-conditioning refrigeration apparatus
US20110030932A1 (en) Multichannel heat exchanger fins
EP3875878B1 (en) Heat exchanger and refrigeration cycle device
WO2017183180A1 (en) Heat exchanger
JP2001324244A (en) Heat exchanger
WO2020230737A1 (en) Heat exchanger and heat pump apparatus
EP3644002B1 (en) Heat exchanger, refrigeration cycle device, and air conditioner
WO2021014603A1 (en) Heat exchanger and air conditioning device using same
WO2017135442A1 (en) Heat exchanger
JP5627632B2 (en) Heat exchanger and heat pump device
JP2004069228A (en) Heat exchanger
JP2011112315A (en) Fin tube type heat exchanger and air conditioner using the same
JP6198976B2 (en) Heat exchanger and refrigeration cycle apparatus
JPH11223421A (en) Refrigerant evaporator
WO2012098913A1 (en) Heat exchanger and air conditioner
JP5569409B2 (en) Heat exchanger and air conditioner
WO2012098915A1 (en) Heat exchanger and air conditioner
JP7037076B2 (en) Manufacturing method of heat exchanger, heat pump device and heat exchanger
JP5573698B2 (en) Heat exchanger and air conditioner
JP5664272B2 (en) Heat exchanger and air conditioner
JP2017133814A (en) Heat exchanger
WO2019150864A1 (en) Refrigeration device
JP4983878B2 (en) Heat exchanger, refrigerator equipped with this heat exchanger, and air conditioner
JP2016176642A (en) Air conditioning device
JP6928793B2 (en) Plate fin laminated heat exchanger and freezing system using it

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: 19938739

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021534477

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: 19938739

Country of ref document: EP

Kind code of ref document: A1