WO2021014603A1 - Échangeur de chaleur et dispositif de climatisation faisant appel à celui-ci - Google Patents

Échangeur de chaleur et dispositif de climatisation faisant appel à celui-ci Download PDF

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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
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
flat
joint
brazing
insertion port
Prior art date
Application number
PCT/JP2019/028977
Other languages
English (en)
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/ja
Priority to PCT/JP2019/028977 priority patent/WO2021014603A1/fr
Publication of WO2021014603A1 publication Critical patent/WO2021014603A1/fr

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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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

L'invention concerne un échangeur de chaleur comprenant un tube plat, un tube circulaire et un joint plat qui relie le tube plat et le tube circulaire. Le joint plat comprend au moins deux éléments de joint obtenus en divisant celui-ci au niveau d'une section longitudinale le long du grand côté de la forme plate et au centre de l'axe du tube plat et est formé par brasage des deux éléments de joint avec le tube plat et le tube circulaire intercalés entre ceux-ci. Un premier orifice d'insertion correspondant au tube plat est formé sur un côté d'extrémité du joint plat et un second orifice d'insertion correspondant au tube circulaire est formé sur l'autre côté d'extrémité. Un réservoir de matériau de brasage destiné à collecter le matériau de brasage fondu pendant le brasage est formé au niveau de la partie côté premier orifice d'insertion d'au moins l'un des deux éléments de joint au niveau de laquelle est brasé le tube plat. Ainsi, en collectant le matériau de brasage dans le réservoir de matériau de brasage disposé au niveau de la partie du joint plat au niveau de laquelle est brasé le tube plat, le matériau de brasage peut être suffisamment bien réparti à la surface du joint au niveau de laquelle le matériau de brasage est nécessaire pendant le brasage et la génération de vides dus à une alimentation insuffisante en matériau de brasage peut être supprimée.
PCT/JP2019/028977 2019-07-24 2019-07-24 Échangeur de chaleur et dispositif de climatisation faisant appel à celui-ci WO2021014603A1 (fr)

Priority Applications (2)

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JP2021534477A JP7170881B2 (ja) 2019-07-24 2019-07-24 熱交換器およびそれを用いた空気調和装置
PCT/JP2019/028977 WO2021014603A1 (fr) 2019-07-24 2019-07-24 Échangeur de chaleur et dispositif de climatisation faisant appel à celui-ci

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PCT/JP2019/028977 WO2021014603A1 (fr) 2019-07-24 2019-07-24 Échangeur de chaleur et dispositif de climatisation faisant appel à celui-ci

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WO2022191106A1 (fr) * 2021-03-09 2022-09-15 三菱電機株式会社 Élément de séparation et échangeur de chaleur

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WO1996034245A1 (fr) * 1995-04-26 1996-10-31 Helmut Lingemann Gmbh & Co. Tube plat a cavites multiples pour echangeurs de chaleur et son procede de fabrication
JP2004306133A (ja) * 2003-03-25 2004-11-04 Calsonic Kansei Corp 熱交換器用チューブ及び熱交換器用チューブの製造方法
EP1748270A1 (fr) * 2005-07-27 2007-01-31 Behr GmbH & Co. KG Echangeur de chaleur
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WO2019031210A1 (fr) * 2017-08-09 2019-02-14 住友電工焼結合金株式会社 Élément assemblé

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JPS49123953A (fr) * 1973-03-27 1974-11-27
JPH0732133A (ja) * 1993-07-20 1995-02-03 Zexel Corp 熱交換器用偏平チューブの製造方法
WO1996034245A1 (fr) * 1995-04-26 1996-10-31 Helmut Lingemann Gmbh & Co. Tube plat a cavites multiples pour echangeurs de chaleur et son procede de fabrication
JP2004306133A (ja) * 2003-03-25 2004-11-04 Calsonic Kansei Corp 熱交換器用チューブ及び熱交換器用チューブの製造方法
EP1748270A1 (fr) * 2005-07-27 2007-01-31 Behr GmbH & Co. KG Echangeur de chaleur
US7254026B2 (en) * 2005-11-18 2007-08-07 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Heat dissipation device with heat pipe
JP2016038141A (ja) * 2014-08-07 2016-03-22 三菱電機株式会社 熱交換器
WO2016031500A1 (fr) * 2014-08-27 2016-03-03 住友電工焼結合金株式会社 Article assemblé par brasage
WO2019031210A1 (fr) * 2017-08-09 2019-02-14 住友電工焼結合金株式会社 Élément assemblé

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