WO2021009806A1 - Brazing jig and multilayer refrigerant distributor produced using same - Google Patents

Brazing jig and multilayer refrigerant distributor produced using same Download PDF

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Publication number
WO2021009806A1
WO2021009806A1 PCT/JP2019/027721 JP2019027721W WO2021009806A1 WO 2021009806 A1 WO2021009806 A1 WO 2021009806A1 JP 2019027721 W JP2019027721 W JP 2019027721W WO 2021009806 A1 WO2021009806 A1 WO 2021009806A1
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WO
WIPO (PCT)
Prior art keywords
plate
jig
brazing
laminated
shaped
Prior art date
Application number
PCT/JP2019/027721
Other languages
French (fr)
Japanese (ja)
Inventor
哲玄 千葉
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 PCT/JP2019/027721 priority Critical patent/WO2021009806A1/en
Publication of WO2021009806A1 publication Critical patent/WO2021009806A1/en

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    • 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
    • B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates

Definitions

  • the present invention relates to a brazing jig for a laminated refrigerant distributor configured by laminating a plurality of plate-like bodies, and a laminated refrigerant distributor manufactured by using the brazing jig.
  • a refrigerant distributor that distributes the inflowing refrigerant into a plurality of heat exchangers in a refrigerant circuit in a refrigeration cycle device such as an air conditioner has been used.
  • a refrigerant distributor for example, a laminated refrigerant distributor configured by laminating a plurality of plate-like bodies is used (see, for example, Patent Document 1).
  • the laminated refrigerant distributor for example, one circular tube is connected to one end face in the stacking direction, and a plurality of heat transfer tubes such as flat perforated tubes are connected to the other end face.
  • the circular pipe serves as the refrigerant inlet pipe, and the plurality of heat transfer pipes serve as the refrigerant outlet pipe.
  • Such a laminated refrigerant distributor is manufactured by sandwiching a plurality of plate-like bodies with brazing jigs and brazing and joining them (see, for example, Patent Document 2). Specifically, when a plurality of plate-shaped bodies of a laminated refrigerant distributor are brazed and joined, the plurality of plate-shaped bodies are laminated and laminated with a brazing material interposed between the plurality of plate-shaped bodies. One end face and the other end face in the direction are fixed so as to be sandwiched by the pressurizing device. Then, brazing in the furnace is performed with the plurality of plate-shaped bodies sandwiched by the pressurizing device.
  • the plurality of plate-shaped bodies are brazed in a furnace with a long brazing jig interposed between each of both end faces in the stacking direction and the pressurizing portion of the pressurizing device. Is done.
  • the surface pressure acting on each of both end faces in the stacking direction of the plurality of plate-shaped bodies can be made uniform.
  • the laminated refrigerant distributor is arranged in the furnace so that the stacking direction of the plurality of plate-like bodies is the vertical direction.
  • Insertion holes for inserting heat transfer tubes are formed in the plurality of plate-shaped bodies, and when the brazing of the plurality of plate-shaped bodies is completed, the insertion holes provided in the plurality of brazed plate-shaped bodies are provided. Multiple heat transfer tubes are inserted at the same time.
  • the difference between the linear expansion coefficient of a plurality of plate-shaped bodies and the linear expansion coefficient of a long brazing jig may change. Therefore, the insertability when a plurality of heat transfer tubes are simultaneously inserted into a plurality of brazed plate-like bodies deteriorates, and the working time increases. Further, in some cases, when a plurality of heat transfer tubes are simultaneously inserted into a plurality of plate-shaped bodies, some of the heat transfer tubes may be crushed or deformed, which is practically inconvenient.
  • the present invention has been made in view of the above-mentioned problems in the prior art, and suppresses changes in the position and size of the insertion hole for inserting the heat transfer tube during brazing, and can provide a plurality of heat transfer tubes. It is an object of the present invention to provide a brazing jig capable of improving insertability at the same time.
  • the brazing jig of the present invention is a brazing jig used when brazing a laminated refrigerant distributor in which a plurality of long plate-shaped bodies are laminated, and is the plate-shaped body.
  • a first jig provided in contact with one end face in the stacking direction of the plate-shaped body and divided into a plurality of pieces in the longitudinal direction of the plate-shaped body, and a second jig provided in contact with the other end face in the stacking direction of the plate-shaped body. It is equipped with a jig.
  • the laminated refrigerant distributor of the present invention is a laminated refrigerant distributor manufactured by using the brazing jig according to the present invention, and heating marks are formed on the end faces of the plate-shaped bodies in the stacking direction. It is what has been done.
  • the first jig divided into a plurality of parts follows the thermal expansion of the plate-like body in contact with the first jig, and the first jig It expands without being affected by the thermal expansion of.
  • the amount of heat expansion and the amount of heat contraction of 11 of the plate-shaped body during the brazing process so that changes in the positions and dimensions of the insertion holes are suppressed, so that a plurality of heat transfer tubes can be used. It is possible to improve the insertability when inserting at the same time.
  • brazing jig causes practical inconvenience to the laminated refrigerant distributor when a plurality of heat transfer tubes are simultaneously inserted into the brazed laminated refrigerant distributor. Brazing or deformation can be suppressed.
  • FIG. 1 It is a schematic diagram which shows an example of the structure of the heat exchanger to which the laminated type refrigerant distributor which concerns on Embodiment 1 is applied. It is an exploded perspective view which shows an example of the structure of the 1st distributor. It is an enlarged perspective view of the part A of the 1st distributor shown in FIG. It is a schematic view which enlarged the part A of the 1st distributor shown in FIG. 2 and seen from the flow path inlet side. It is a development view of the 1st distributor shown in FIG. It is a vertical sectional view of the 1st distributor shown in FIG. It is the schematic which shows an example of the structure of the brazing jig which concerns on Embodiment 1.
  • the brazing jig and the laminated refrigerant distributor shown in the following drawings are examples of equipment to which the brazing jig and the laminated refrigerant distributor of the present invention are applied, and are shown in the drawings.
  • the applicable equipment of the present invention is not limited by the brazing jig and the laminated refrigerant distributor.
  • those having the same reference numerals are the same or equivalent thereof, which are common in the entire text of the specification. In each drawing, the relative dimensional relationship or shape of each component may differ from the actual one.
  • Embodiment 1 The brazing jig and the laminated refrigerant distributor according to the first embodiment will be described.
  • a laminated refrigerant distributor provided on the refrigerant inflow side or the refrigerant outflow side of the heat exchanger constituting the refrigeration cycle device such as an air conditioner is manufactured. Used when.
  • a laminated refrigerant distributor manufactured by using the brazing jig according to the first embodiment will be described.
  • FIG. 1 is a schematic view showing an example of the configuration of a heat exchanger to which the laminated refrigerant distributor according to the first embodiment is applied.
  • the flow direction of the refrigerant is indicated by an arrow.
  • the heat exchanger 1 includes a first distributor 2, a second distributor 3, a plurality of heat transfer tubes 4, and a plurality of fins 5.
  • the first distributor 2 distributes the inflowing refrigerant and causes it to flow out. At least one distribution flow path 2a is formed inside the first distributor 2. A refrigerant pipe is connected to the inflow side of the distribution flow path 2a. A plurality of heat transfer tubes 4 are connected to the outflow side of the distribution flow path 2a.
  • the laminated refrigerant distributor according to the first embodiment is applied to the first distributor 2.
  • the second distributor 3 merges the inflowing refrigerant and causes it to flow out.
  • a merging flow path 3a is formed inside the second distributor 3.
  • a plurality of heat transfer tubes 4 are connected to the inflow side of the merging flow path 3a.
  • a refrigerant pipe is connected to the outflow side of the merging flow path 3a.
  • the laminated refrigerant distributor according to the first embodiment may be applied to the second distributor 3, or a distributor of a type different from that of the first distributor 2 may be applied. You may.
  • the heat transfer tube 4 is a flat tube or a circular tube in which a plurality of flow paths are formed.
  • the heat transfer tube 4 is made of, for example, aluminum.
  • the plurality of heat transfer tubes 4 are arranged side by side in a certain direction, for example.
  • a plurality of fins 5 are joined to the heat transfer tube 4.
  • the fin 5 is made of, for example, aluminum.
  • the heat transfer tube 4 and the fin 5 are joined by brazing, for example.
  • the example of FIG. 1 shows a case where the number of heat transfer tubes 4 is four, but this is not limited to this example. Further, in the example of FIG. 1, a case where the heat transfer tube 4 is a flat tube will be described.
  • the refrigerant flowing through the refrigerant pipe flows into the first distributor 2, is distributed in the distribution flow path 2a, and flows out to the plurality of heat transfer tubes 4.
  • the refrigerant exchanges heat with a fluid such as air supplied by a fan (not shown) in the plurality of heat transfer tubes 4.
  • the refrigerant flowing through the plurality of heat transfer tubes 4 flows into the merging flow path 3a of the second distributor 3, merges, and flows out to the refrigerant pipe.
  • the refrigerant can flow back, that is, can flow from the second distributor 3 toward the first distributor 2.
  • FIG. 2 is an exploded perspective view showing an example of the configuration of the first distributor.
  • FIG. 3 is an enlarged perspective view of a portion A of the first distributor shown in FIG.
  • FIG. 4 is an enlarged schematic view of a portion A of the first distributor shown in FIG. 2 as viewed from the flow path inlet side. Note that FIG. 4 also shows the heat transfer tube 4.
  • the first distributor 2 has a plate-shaped body 11 formed in a long shape.
  • the first plate-shaped members 12_1 to 12_1 to be the bare material and the second plate-shaped members 13_1 to the second plate-shaped members 13_3 to be the clad materials are alternately laminated. It is formed.
  • the first plate-shaped member 12_1 and the first plate-shaped member 12_1 are laminated on the outermost side of the plate-shaped body 11 in the stacking direction.
  • the first plate-shaped member 12_1 to the first plate-shaped member 12_1 may be collectively referred to as the first plate-shaped member 12.
  • the second plate-shaped member 13_1 to the second plate-shaped member 13_3 may be collectively referred to as the second plate-shaped member 13.
  • the first plate-shaped member 12 is made of, for example, aluminum or an aluminum alloy, and is made of a member having a thickness of about 3 mm. This is because aluminum or an aluminum alloy is cheaper and lighter than copper used in conventional heat exchangers, and has high thermal conductivity. As described above, by using aluminum or an aluminum alloy as the material of the first plate-shaped member 12, cost reduction can be effectively performed. The brazing material is not applied to the first plate-shaped member 12.
  • Through holes 12a_1 to 12a_4 serving as distribution flow paths 2a are formed in each of the first plate-shaped members 12.
  • the through holes 12a_1 to 12a_4 penetrate the front and back surfaces of the first plate-shaped member 12.
  • the through holes 12a_1 to 12a_3 function as a part of the distribution flow path 2a.
  • the through hole 12a_1 functions as a fluid inlet portion into which a fluid such as a refrigerant flows.
  • the end of the through hole 12a_3 functions as a fluid outlet portion through which a fluid such as a refrigerant flows out.
  • the through hole 12a_4 functions as the heat transfer tube insertion portion 2b, a fluid such as a refrigerant does not flow.
  • the second plate-shaped member 13 is made of, for example, aluminum or an aluminum alloy, and is formed thinner (for example, about 1 mm) than the first plate-shaped member 12.
  • a brazing material is applied to at least the front and back surfaces of the second plate-shaped member 13.
  • Through holes 13a_1 and through holes 13a_2 serving as distribution flow paths 2a are formed in each of the second plate-shaped members 13.
  • the through holes 13a_1 to 13a_3 penetrate the front and back surfaces of the second plate-shaped member 13.
  • the first plate-shaped member 12 and the second plate-shaped member 13 are not limited to this example, and may be made of stainless steel, for example. Any material may be used as long as it has sufficient heat resistance to heating in the brazing treatment of the first distributor 2 which is a laminated refrigerant distributor.
  • the through hole 13a_1 and the through hole 13a_2 function as a part of the distribution flow path 2a. Since the through hole 13a_3 functions as the heat transfer tube insertion portion 2b, a fluid such as a refrigerant does not flow.
  • the through hole 12a_1 formed in the first plate-shaped member 12_1, the through hole 13a_1 formed in the second plate-shaped member 13_1, and the through hole 13a_1 formed in the second plate-shaped member 13_2 have a circular cross-sectional shape of the flow path. It is formed through.
  • the flow path cross section is a cross section obtained by cutting the flow path in a direction orthogonal to the flow of the fluid.
  • a refrigerant pipe as an inlet pipe is connected to the through hole 12a_1 that functions as a fluid inlet portion.
  • a base or the like may be provided on the surface of the first plate-shaped member 12_1 on the inflow side of the refrigerant, and the refrigerant pipe may be connected via the base or the like.
  • the inner peripheral surface of the through hole 12a_1 may be shaped to fit with the outer peripheral surface of the refrigerant pipe, and the refrigerant pipe may be directly connected to the through hole 12a_1 without using a base or the like.
  • the through hole 12a_2 formed in the first plate-shaped member 12_2 is formed through, for example, in a Z-shaped cross section of the flow path.
  • the through hole 13a_1 of the second plate-shaped member 13_1 laminated on the side where the refrigerant of the first plate-shaped member 12_2 flows in is formed at a position facing the center of the through hole 12a_2.
  • the through hole 13a_2 of the second plate-shaped member 13_2, which is laminated on the side where the refrigerant of the first plate-shaped member 12_2 flows out, is formed at a position facing the end of the through hole 12a_2.
  • the through hole 12a_3 formed in the first plate-shaped member 12_3 is formed through, for example, in a shape in which a Z-shaped portion of the flow path cross section and a linear portion of the flow path cross section are combined.
  • the Z-shaped portion of the flow path cross section will be referred to as the Z-shaped portion 112A
  • the linear portion of the flow path cross section will be referred to as the linear portion 112B.
  • the linear portion 112B communicates with both ends of the Z-shaped portion 112A. That is, the linear portion 112B is formed as a space portion located at the end of the through hole 12a_3, that is, the end of the distribution flow path 2a, and corresponds to a portion that functions as a fluid outlet portion.
  • the upper end of the Z-shaped portion 112A communicates with the lower side of the linear portion 112B located on the upper side of the paper surface. Further, in FIG. 3, the lower end of the Z-shaped portion 112A communicates with the upper side of the linear portion 112B located on the lower side of the paper surface.
  • the two linear portions 112B are parallel to each other. Further, as shown in FIG. 4, the opening area of the linear portion 112B is larger than the opening area of the tip portion 4a of the heat transfer tube 4.
  • the through hole 13a_2 of the second plate-shaped member 13_2 laminated on the side where the refrigerant of the first plate-shaped member 12_3 flows in is formed at a position facing the center of the through hole 12a_3.
  • the through hole 13a_3 of the second plate-shaped member 13_3 laminated on the side opposite to the second plate-shaped member 13_2 of the first plate-shaped member 12_3 is formed at a position facing the linear portion 112B of the through hole 12a_3.
  • a distribution flow path 2a is formed by communicating with each other. That is, when the first plate-shaped member 12 and the second plate-shaped member 13 are laminated, the adjacent through holes communicate with each other, and the portion other than the communicating through holes is adjacent to the first plate-shaped member 12 or the first plate-shaped member 12. It is closed by the two-plate-shaped member 13 to form the distribution flow path 2a.
  • the distribution flow path 2a has four fluid outlets for one fluid inlet is shown as an example, but the number of branches is limited to four. It is not something to do.
  • the through hole 12a_4 formed in the first plate-shaped member 12_4 and the through hole 13a_3 formed in the second plate-shaped member 13_3 are linear portions 112B which are the ends of the through hole 12a_3. It is formed in the facing direction of the heat transfer tube 4 and functions as a heat transfer tube insertion portion 2b into which the tip end portion 4a of the heat transfer tube 4 is inserted. That is, the through holes 12a_4 and the through holes 13a_3 are formed at positions facing the linear portion 112B located on the extension line of the heat transfer tube 4, and by inserting the heat transfer tube 4 into the through holes 12a_4 and the through holes 13a_3.
  • the heat transfer tube 4 is connected to the first distributor 2.
  • the tip portion 4a of the heat transfer tube 4 may be at the position of the through hole 13a_3 of the second plate-shaped member 13_3, or may be the position of the linear portion 112B of the through hole 12a_3 of the first plate-shaped member 12_3. Good. That is, the tip portion 4a of the heat transfer tube 4 may be at a position where it does not come into contact with the second plate-shaped member 13_2.
  • the inner peripheral surface of the through hole 12a_4 of the first plate-shaped member 12_4 is fitted to the outer peripheral surface of the heat transfer tube 4.
  • the fitting should have a gap such that the heated brazing material is infiltrated by the capillary phenomenon.
  • FIG. 5 is a development view of the first distributor shown in FIG.
  • FIG. 6 is a vertical sectional view of the first distributor 2 shown in FIG.
  • the thickness of each plate-shaped body 11 is shown as being substantially uniform.
  • FIG. 6 shows a cross section cut along the flow direction of the fluid.
  • the refrigerant flowing through the refrigerant pipe flows into the inside of the first distributor 2 with the through hole 12a_1 of the first plate-shaped member 12_1 as the fluid inlet portion.
  • the refrigerant that has flowed in through the through hole 12a_1 flows into the through hole 13a_1 of the second plate-shaped member 13_1.
  • the refrigerant that has flowed into the center of the through hole 12a_2 of the first plate-shaped member 12_2 hits the surface of the second plate-shaped member 13_2 that is laminated adjacently and branches, and reaches the end of the through hole 12a_2 of the first plate-shaped member 12_2. It flows.
  • the refrigerant that has reached the end of the through hole 12a_2 of the first plate-shaped member 12_2 passes through the through hole 13a_2 of the second plate-shaped member 13_2 and flows into the center of the through hole 12a_3 of the first plate-shaped member 12_3.
  • the refrigerant that has flowed into the center of the through hole 12a_3 of the first plate-shaped member 12_3 hits the surface of the second plate-shaped member 13_3 that is laminated adjacently and branches, and reaches the end of the through hole 12a_3 of the first plate-shaped member 12_3. It flows.
  • the linear portion 112B which is the end portion of the through hole 12a_3 of the first plate-shaped member 12_3, functions as a fluid outlet portion, and the refrigerant reaching the end portion of the through hole 12a_3 of the first plate-shaped member 12_3 is a through hole. It flows into the inside of the heat transfer tube 4 from the tip portion 4a of the heat transfer tube 4 located in 13a_3 or the through hole 12a_3.
  • the refrigerant that has flowed into the heat transfer tube 4 passes through a region located inside the through hole 13a_3 of the second plate-shaped member 13_3 and inside the through hole 12a_4 of the first plate-shaped member 12_4, and the fin 5 of the heat transfer tube 4 passes through the region. It flows into the joined area.
  • FIG. 7 is a schematic view showing an example of the configuration of the brazing jig according to the first embodiment.
  • FIG. 8 is a schematic view for explaining the arrangement of the brazing jig with respect to the laminated refrigerant distributor.
  • FIG. 9 is a schematic view showing an arrangement state of the brazing jig during the brazing process.
  • the brazing jig 50 is composed of a plate-shaped first jig 51 and a second jig 52.
  • the brazing jig 50 is a laminated refrigerant distributor before brazing, which is formed of a plurality of plate-shaped bodies 11 by the first jig 51 and the second jig 52. It is used to sandwich 60. Then, the first jig 51, the second jig 52, and the laminated refrigerant distributor 60 are pressed and fixed by the pressurizing jig 70 during the brazing process.
  • the first jig 51 and the second jig 52 are not limited to a plate shape, and may be formed in a block shape, for example.
  • the first jig 51 is made of, for example, stainless steel.
  • the first jig 51 is formed by being divided into a plurality of pieces in the longitudinal direction (x direction in FIG. 7) of the elongated plate-shaped body 11.
  • the example of FIG. 7 shows a case where the first jig 51 is divided into two divided first jigs 51A and 51B.
  • the first division jigs 51A and 51B are formed so that the width (length in the y direction) is substantially the same as the length in the lateral direction of the laminated refrigerant distributor 60.
  • the first jig 51 uses, as shown in FIG. 8, among the end faces of the plurality of laminated plate-like bodies 11 in the stacking direction (z direction).
  • the heat transfer tube 4 which is a flat tube is arranged so as to be in contact with the end face on the refrigerant outlet side to which the heat transfer tube 4 is connected.
  • the first jig 51 is arranged so that the longitudinal direction coincides with the longitudinal direction of the plate-shaped body 11 in which the heat transfer tube insertion portions 2b of the laminated refrigerant distributor 60 are arranged side by side.
  • the first jig 51 is formed with a first through hole 51a.
  • the first through hole 51a is provided at a position corresponding to the heat transfer tube insertion portion 2b, which is an insertion hole provided in the plate-shaped body 11 of the laminated refrigerant distributor 60, and is provided at a position corresponding to the heat transfer tube insertion portion of the laminated refrigerant distributor 60.
  • One or more are provided depending on the number of 2b.
  • the portion of the plate-shaped body 11 where the first through hole 51a is not provided is a pressurized surface to be pressurized by the pressurizing jig 70 described later.
  • the second jig 52 is made of stainless steel, for example, and is formed in a long shape.
  • the second jig 52 is formed so that the lengths in the x direction and the y direction are substantially the same as the lengths in the longitudinal direction and the lateral direction of the laminated refrigerant distributor 60.
  • the second jig 52 uses, as shown in FIG. 8, among the end faces of the plurality of laminated plate-like bodies 11 in the stacking direction (z direction). It is arranged so as to be in contact with the end face on the refrigerant inlet side to which the circular pipe is connected.
  • the second jig 52 is formed with a second through hole 52a.
  • the second through hole 52a is a pipe on the refrigerant inlet side attached to the plate-shaped body 11 of the laminated refrigerant distributor 60 when the second jig 52 is arranged in contact with the laminated refrigerant distributor 60. It is provided to avoid a certain circular pipe.
  • the first jig 51 and the second jig 52 constituting the brazing jig 50 are made of stainless steel as described above. This is because the heat resistance is high and the force of the pressurizing jig 70 can be evenly applied to the laminated refrigerant distributor 60 even at a high temperature when the brazing process is performed.
  • the material of the brazing jig 50 is not limited to this example as long as the mechanical strength of the jig does not decrease with respect to the temperature during the brazing process, and any material may be used. Good.
  • the heat resistance shows the property of maintaining the physical properties of the material, and can be determined by, for example, the melting point or the coefficient of thermal expansion of the material.
  • the brazing jig 50 uses a material having higher heat resistance than the plate-shaped body 11. It is more preferable to be brazed. This is a brazing jig 50 having higher heat resistance even when the plate-like body 11 may be deformed by heating when the brazing treatment of the laminated refrigerant distributor 60 is performed in the furnace. This is because the deformation of the plate-shaped body 11 can be suppressed.
  • the pressurizing jig 70 has a pressurizing surface on the first jig 51 side and the second jig 52 side in a state where the first jig 51 and the second jig 52 are arranged with respect to the laminated refrigerant distributor 60.
  • the first jig 51, the second jig 52, and the plurality of plate-shaped bodies 11 are fixed by applying pressure in the central direction (z direction).
  • the pressurizing jig 70 has a grip portion 71.
  • the grip portion 71 is opened and closed by, for example, an elastic force, and the first jig 51 and the second jig 51 and the second jig 51 are sandwiched between the first jig 51 and the second jig 52 with the laminated refrigerant distributor 60 before brazing.
  • the pressure surface of the jig 52 is gripped.
  • the pressurizing jig 70 is not limited to this example.
  • the laminated refrigerant distributor 60 to which the first jig 51 and the second jig 52 are attached can be pressurized, and has heat resistance to heat during the brazing process of the laminated refrigerant distributor 60.
  • it may be of any shape and material.
  • FIG. 10 to 13 are schematic views for explaining the flow of the brazing process of the laminated refrigerant distributor.
  • the first plate-shaped members 12_1 to 12_6 and the second plate-shaped members 13_1 to 13_5 are alternately arranged.
  • a refrigerant pipe which is an inlet pipe, is previously attached to the through hole 12a_1 of the first plate-shaped member 12_1 by brazing.
  • the first plate-shaped members 12_1 to 12_6 and the second plate-shaped members 13_1 to 13_5 are laminated. As a result, the laminated refrigerant distributor 60 before brazing is formed.
  • the first jig 51 and the second jig 52 are laminated. It is arranged so as to sandwich the refrigerant distributor 60. Division of the first jig 51 The first jig 51A is arranged so that one end face in the longitudinal direction coincides with one end face in the longitudinal direction of the laminated refrigerant distributor 60. Further, the divided first jig 51B of the first jig 51 is arranged so that the other end face in the longitudinal direction coincides with the other end face in the longitudinal direction of the laminated refrigerant distributor 60. The second jig 52 is arranged so as to avoid the inlet pipe attached to the first plate-shaped member 12_1 through the second through hole 52a.
  • the pressurizing surfaces of the first jig 51 and the second jig 52 are pressurized by the grip portion 71 of the pressurizing jig 70.
  • the first jig 51, the laminated refrigerant distributor 60, and the second jig 52 are fixed by the pressurizing jig 70 in contact with each other.
  • the laminated refrigerant distributor 60 to which the brazing jig 50 is attached is heated in the furnace.
  • the wax applied to the second plate-shaped member 13 is melted, and the first plate-shaped member 12 and the second plate-shaped member 13 are joined.
  • the heat transfer tube 4 as an outlet pipe is inserted into the heat transfer tube insertion portion 2b of the first plate-shaped member 12_6 with respect to the brazed laminated refrigerant distributor 60, and the brazed material is used. Brazed.
  • FIG. 14 is a schematic view showing the state of the laminated refrigerant distributor after the brazing treatment.
  • heating marks 80 are formed on the surface of the laminated refrigerant distributor 60 by heating the brazing treatment.
  • This is the portion of the surfaces of the first plate-shaped members 12_1 and 12_6 on the outer surface side of the laminated refrigerant distributor 60 that are in contact with the divided first jigs 51A and 51B during the brazing process, and other parts. This is because the method of oxidation is different from that of the part.
  • the “surface” here refers to the end face of the plate-shaped body 11 in the laminated refrigerant distributor 60 in the laminated direction.
  • the portions in contact with the divided first jigs 51A and 51B do not come into direct contact with air in the furnace, so that oxidation is suppressed. ..
  • the parts other than the parts in contact with the first divided jigs 51A and 51B come into contact with air in the furnace, so that oxidation is promoted.
  • Thermal expansion of the plate-shaped body 11 The thermal expansion of the plate-shaped body 11 during the brazing process will be described.
  • the heat transfer tube is determined by the difference between the linear expansion coefficient of the plurality of plate-shaped bodies 11 and the linear expansion coefficient of the conventional brazing jig.
  • the position and size of the heat transfer tube insertion portion 2b into which the 4 is inserted changes. Therefore, when a plurality of heat transfer tubes 4 are simultaneously inserted into the brazed laminated refrigerant distributor, the insertability of the heat transfer tubes 4 deteriorates.
  • the plate-shaped body 11 when the brazing jig 50 according to the first embodiment is used when the influence of thermal expansion of the plate-like body 11 generated during the brazing process is reduced and a plurality of heat transfer tubes 4 are simultaneously inserted into the brazed laminated refrigerant distributor 60.
  • the insertability of the heat transfer tube 4 of the above is improved.
  • the plate-shaped body 11 when the conventional brazing jig is used The thermal expansion of the above will be described.
  • FIG. 15 is a schematic view showing an example of the configuration of a conventional brazing jig.
  • FIG. 16 is a schematic view for explaining the arrangement of the conventional brazing jig with respect to the laminated refrigerant distributor.
  • FIG. 17 is a schematic view showing an arrangement state of a conventional brazing jig during a brazing process.
  • the conventional brazing jig 150 is composed of a first jig 151 and a second jig 152.
  • the brazing jig 150 is a laminated refrigerant distributor before brazing, which is formed of a plurality of plate-shaped bodies 11 by the first jig 151 and the second jig 152. It is used to sandwich 60. Then, the first jig 151, the second jig 152, and the laminated refrigerant distributor 60 are pressed and fixed by the pressurizing jig 70 during the brazing process.
  • the first jig 151 is made of stainless steel, for example, and is formed in a long shape.
  • the length of the first jig 151 in the longitudinal direction (x direction in FIG. 15) and the length in the lateral direction (y direction) is substantially the same as the length in the longitudinal direction and the lateral direction of the laminated refrigerant distributor 60. It is formed so as to be.
  • the conventional first jig 151 is a single plate-shaped member and does not have a first through hole 51a.
  • the first jig 151 uses the end faces of the plurality of laminated plate-like bodies 11 in the stacking direction (z direction) as shown in FIG.
  • the heat transfer tube 4 is arranged so as to be in contact with the end surface on the refrigerant outlet side to which the heat transfer tube 4 is connected.
  • the second jig 152 is made of stainless steel, for example, and is formed in a long shape like the second jig 52 according to the first embodiment.
  • the second jig 152 uses, as shown in FIG. 16, among the end faces of the plurality of laminated plate-like bodies 11 in the stacking direction (z direction). It is arranged so as to be in contact with the end face on the refrigerant inlet side to which the circular pipe is connected. Further, the second jig 152 is formed with a second through hole 52a as in the second jig 52 according to the first embodiment.
  • FIGS. 18 and 19 are schematic cross-sectional views for explaining the thermal expansion of the plate-like body during the brazing process when a conventional brazing jig is used.
  • FIGS. 18 and 19 in order to facilitate the explanation, the first jig 151 of the brazing jig 150 and the first plate-shaped member 12_6 to the second plate-shaped member 13_3 in contact with the first jig 151 A part of the plate-shaped body 11 up to is illustrated. Further, in FIG.
  • the arrows shown on the first jig 151 and the respective plate-shaped bodies 11 indicate the state of thermal expansion in the longitudinal direction (x direction), and the length of the arrow indicates the amount of thermal expansion.
  • the arrows shown by the first jig 151 and the laminated refrigerant distributor 60 indicate the state of heat shrinkage in the longitudinal direction (x direction), and the length of the arrow indicates the amount of heat shrinkage.
  • Thermal expansion and contraction also occur in the lateral direction (y direction) of the plate-shaped body 11, but here, for ease of explanation, only thermal expansion and thermal contraction in the longitudinal direction will be illustrated and described. ..
  • the first jig Thermal expansion occurs in 151 and each plate-shaped body 11.
  • the linear expansion coefficient is different between the first jig 151 made of stainless steel and the plate-shaped body 11 made of aluminum or an aluminum alloy.
  • a brazing material applied to the surface of the second plate-shaped member 13 is interposed between the first plate-shaped member 12 and the second plate-shaped member 13.
  • the first plate-shaped member 12_6 in contact with the first jig 151 does not have a brazing material interposed on the surface. Therefore, it is affected by the thermal expansion of the first jig 151, and the thermal expansion is limited or limited as compared with the first plate-shaped members 12_4 and 12_5 and the second plate-shaped members 13_3 to 13_5 which are other plate-shaped bodies 11. Be regulated.
  • the brazed laminated refrigerant distributor 60 is as shown in FIG. Heat shrinkage occurs. At this time, each plate-shaped body 11 constituting the laminated refrigerant distributor 60 contracts as if it were an integrated laminated refrigerant distributor 60. Therefore, the amount of heat shrinkage of the first plate-shaped member 12_6 in contact with the first jig 151 is larger than the amount of thermal expansion. As a result, the position and dimensions of the heat transfer tube insertion portion 2b provided on the first plate-shaped member 12_6 change as compared with the state before brazing.
  • the plate-shaped body 11 when the plate-shaped body 11 is brazed using the conventional brazing jig 150, the plate-shaped body 11 in contact with the brazing jig 150 and the other plate-shaped bodies 11 are in contact with each other.
  • the position and dimensions of the heat transfer tube insertion portion 2b change due to the difference in the amount of thermal expansion with and from.
  • FIG. 20 is a schematic cross-sectional view for explaining the thermal expansion of the plate-shaped body 11 during the brazing process when the brazing jig according to the first embodiment is used.
  • the plate-shaped body 11 of the portion is illustrated. Further, in FIG.
  • the arrows shown on the first jig 51 and the respective plate-shaped bodies 11 indicate the state of thermal expansion in the longitudinal direction (x direction), and the length of the arrow indicates the amount of thermal expansion. And. Thermal expansion and contraction also occur in the lateral direction (y direction) of the plate-shaped body 11, but here, for ease of explanation, only thermal expansion and thermal contraction in the longitudinal direction will be illustrated and described. ..
  • the brazing jig 50 when used, when heat is applied to the plate-shaped body 11 constituting the laminated refrigerant distributor 60, as shown in FIG. , The first jig 51 and each of the plate-shaped bodies 11 generate thermal expansion. At this time, the linear expansion coefficient is different between the first jig 151 made of stainless steel and the plate-shaped body 11 made of aluminum or an aluminum alloy.
  • the first jig 51 is divided into a plurality of divided first jigs 51A and 51B. Therefore, the split first jigs 51A and 51B follow the thermal expansion of the first plate-shaped member 12_6 in contact with the first plate-shaped member 12_6. As a result, the first plate-shaped member 12_6 in contact with the divided first jigs 51A and 51B is not affected by the thermal expansion of the first jig 51, and the first plate-shaped member 12_4 which is another plate-shaped body 11 And 12_5 and the second plate-shaped members 13_3 to 13_5 are thermally expanded.
  • each plate shape constituting the laminated refrigerant distributor 60 is formed.
  • the body 11 contracts as if it were an integrated laminated refrigerant distributor 60. Therefore, the first plate-shaped member 12_6 in contact with the divided first jigs 51A and 51B is heat-shrinked in the same manner as the first plate-shaped members 12_4 and 12_5 and the second plate-shaped members 13_3 to 13_5, which are other plate-shaped bodies 11. To do.
  • the brazing jig 50 is provided in contact with one end face of the plate-like body 11 in the stacking direction in the laminated refrigerant distributor 60, and has a long plate shape.
  • a first jig 51 divided into a plurality of pieces in the longitudinal direction of the body 11 and a second jig 52 provided in contact with the other end surface of the plate-shaped body 11 in the stacking direction are provided.
  • the first jig 51 follows the thermal expansion of the plate-shaped body 11 in contact with the first jig 51, and thus comes into contact with the first jig 51.
  • the plate-shaped body 11 thermally expands without being affected by the thermal expansion of the first jig 51. Therefore, since there is no difference between the amount of thermal expansion and the amount of heat shrinkage of the plate-shaped body 11 during the brazing process, changes in the position and dimensions of the heat transfer tube insertion portion 2b can be suppressed.
  • the first jig 51 has a first through hole 51a penetrating in the stacking direction of the plate-shaped body 11.
  • the first through hole 51a is provided at a position corresponding to the heat transfer tube insertion portion 2b formed in the plate-shaped body 11.
  • the second jig 52 has a second through hole 52a that avoids the piping attached to the plate-shaped body 11.
  • the second jig 52 can be attached to the laminated refrigerant distributor 60 during the brazing process regardless of the presence or absence of piping.
  • the laminated refrigerant distributor 60 according to the first embodiment is manufactured by using the brazing jig 50 according to the first embodiment, and is formed on the end face of the plate-shaped body 11 in the laminated direction.
  • a heating mark 80 is formed.
  • Such a heating mark 80 is a method of oxidation at a portion that contacts the brazing jig attached to the surface of the plate-shaped body 11 and a portion that does not contact during the brazing treatment of the laminated refrigerant distributor 60. Is caused by different. Therefore, the shape of the brazing jig when the laminated refrigerant distributor 60 is manufactured can be determined from the state of the heating marks 80.

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  • Mechanical Engineering (AREA)
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Abstract

A brazing jig used for brazing a multilayer refrigerant distributor in which multiple long boards are stacked, the jig comprising: a first jig provided in contact with one end face of the boards in the stacking direction and divided into multiple pieces in the longitudinal direction of the boards; and a second jig provided in contact with the other end face of the boards in the stacking direction.

Description

ろう付け用治具、および、それを用いて作製された積層型冷媒分配器Brazing jig and laminated refrigerant distributor manufactured using it
　本発明は、複数の板状体が積層されて構成された積層型冷媒分配器のろう付け用治具、および、それを用いて作製された積層型冷媒分配器に関する。 The present invention relates to a brazing jig for a laminated refrigerant distributor configured by laminating a plurality of plate-like bodies, and a laminated refrigerant distributor manufactured by using the brazing jig.
　従来、空気調和装置などの冷凍サイクル装置における冷媒回路の熱交換器には、流入する冷媒を複数に分配する冷媒分配器が用いられている。このような冷媒分配器として、例えば、複数の板状体が積層されて構成された積層型冷媒分配器が用いられる（例えば、特許文献１参照）。積層型冷媒分配器は、例えば、積層方向の一方の端面に、１つの円管が接続されるとともに、他方の端面に、複数の扁平多孔管などの伝熱管が接続される。この場合、積層型冷媒分配器では、円管が冷媒の入口管となり、複数の伝熱管が冷媒の出口管となる。 Conventionally, a refrigerant distributor that distributes the inflowing refrigerant into a plurality of heat exchangers in a refrigerant circuit in a refrigeration cycle device such as an air conditioner has been used. As such a refrigerant distributor, for example, a laminated refrigerant distributor configured by laminating a plurality of plate-like bodies is used (see, for example, Patent Document 1). In the laminated refrigerant distributor, for example, one circular tube is connected to one end face in the stacking direction, and a plurality of heat transfer tubes such as flat perforated tubes are connected to the other end face. In this case, in the laminated refrigerant distributor, the circular pipe serves as the refrigerant inlet pipe, and the plurality of heat transfer pipes serve as the refrigerant outlet pipe.
　このような積層型冷媒分配器は、複数の板状体をろう付け用治具で挟んでろう付接合されることによって作製される（例えば、特許文献２参照）。具体的には、積層型冷媒分配器の複数の板状体をろう付け接合する場合、複数の板状体は、隣接する板状体との間にろう材が介在した状態で積層され、積層方向の一方の端面と他方の端面とが加圧装置によって狭持されるように固定される。そして、複数の板状体が加圧装置によって狭持された状態で、炉中ろう付けが行われる。 Such a laminated refrigerant distributor is manufactured by sandwiching a plurality of plate-like bodies with brazing jigs and brazing and joining them (see, for example, Patent Document 2). Specifically, when a plurality of plate-shaped bodies of a laminated refrigerant distributor are brazed and joined, the plurality of plate-shaped bodies are laminated and laminated with a brazing material interposed between the plurality of plate-shaped bodies. One end face and the other end face in the direction are fixed so as to be sandwiched by the pressurizing device. Then, brazing in the furnace is performed with the plurality of plate-shaped bodies sandwiched by the pressurizing device.
　このとき、複数の板状体は、積層方向の両端面のそれぞれと加圧装置の加圧部との間に、長尺状のろう付け用治具を介在させた状態で、炉中ろう付けが行われる。これにより、複数の板状体の積層方向の両端面のそれぞれに作用する面圧の均一化が図られる。また、炉中ろう付けの際には、複数の板状体の積層方向が鉛直方向となるように、積層型冷媒分配器が炉内に配置される。複数の板状体には、伝熱管を挿入するための挿入孔が形成されており、複数の板状体のろう付けが完了すると、ろう付けされた複数の板状体に設けられた挿入孔に、複数の伝熱管が同時に挿入される。 At this time, the plurality of plate-shaped bodies are brazed in a furnace with a long brazing jig interposed between each of both end faces in the stacking direction and the pressurizing portion of the pressurizing device. Is done. As a result, the surface pressure acting on each of both end faces in the stacking direction of the plurality of plate-shaped bodies can be made uniform. Further, at the time of brazing in the furnace, the laminated refrigerant distributor is arranged in the furnace so that the stacking direction of the plurality of plate-like bodies is the vertical direction. Insertion holes for inserting heat transfer tubes are formed in the plurality of plate-shaped bodies, and when the brazing of the plurality of plate-shaped bodies is completed, the insertion holes provided in the plurality of brazed plate-shaped bodies are provided. Multiple heat transfer tubes are inserted at the same time.
国際公開第２０１８／１１６４１３号International Publication No. 2018/116413 国際公開第２０１８／０２９７６１号International Publication No. 2018/029761
　ところで、上述したようにして炉中ろう付けが行われた積層型冷媒分配器では、複数の板状体の線膨張率と、長尺状のろう付け用治具の線膨張率との差により、伝熱管が挿入される挿入孔の位置および寸法が変化する虞がある。そのため、ろう付けされた複数の板状体に対して複数の伝熱管を同時に挿入する際の挿入性が悪化し、作業時間が増大する。また、場合によっては、複数の板状体に対して複数の伝熱管を同時に挿入する際に、一部の伝熱管に実用上不都合なつぶれあるいは変形が生じる虞がある。 By the way, in the laminated refrigerant distributor in which brazing is performed in the furnace as described above, the difference between the linear expansion coefficient of a plurality of plate-shaped bodies and the linear expansion coefficient of a long brazing jig , The position and size of the insertion hole into which the heat transfer tube is inserted may change. Therefore, the insertability when a plurality of heat transfer tubes are simultaneously inserted into a plurality of brazed plate-like bodies deteriorates, and the working time increases. Further, in some cases, when a plurality of heat transfer tubes are simultaneously inserted into a plurality of plate-shaped bodies, some of the heat transfer tubes may be crushed or deformed, which is practically inconvenient.
　本発明は、上記従来の技術における課題に鑑みてなされたものであって、ろう付けの際の、伝熱管を挿入するための挿入孔の位置および寸法の変化を抑制し、複数の伝熱管を同時に挿入する際の挿入性を向上させることができるろう付け用治具を提供することを目的とする。 The present invention has been made in view of the above-mentioned problems in the prior art, and suppresses changes in the position and size of the insertion hole for inserting the heat transfer tube during brazing, and can provide a plurality of heat transfer tubes. It is an object of the present invention to provide a brazing jig capable of improving insertability at the same time.
　また、本発明は、上記のろう付け用治具を用いてろう付けされた複数の板状体に対して複数の伝熱管を同時に挿入する際に、実用上不都合となるつぶれあるいは変形が抑制された積層型冷媒分配器を提供することを目的とする。 Further, in the present invention, when a plurality of heat transfer tubes are simultaneously inserted into a plurality of plate-shaped bodies brazed using the above brazing jig, crushing or deformation which is inconvenient for practical use is suppressed. It is an object of the present invention to provide a laminated refrigerant distributor.
　本発明のろう付け用治具は、長尺状の複数の板状体が積層された積層型冷媒分配器のろう付けを行う際に用いられるろう付け用治具であって、前記板状体の積層方向の一方の端面に接して設けられ、前記板状体の長手方向において複数に分割された第１治具と、前記板状体の積層方向の他方の端面に接して設けられる第２治具とを備えるものである。 The brazing jig of the present invention is a brazing jig used when brazing a laminated refrigerant distributor in which a plurality of long plate-shaped bodies are laminated, and is the plate-shaped body. A first jig provided in contact with one end face in the stacking direction of the plate-shaped body and divided into a plurality of pieces in the longitudinal direction of the plate-shaped body, and a second jig provided in contact with the other end face in the stacking direction of the plate-shaped body. It is equipped with a jig.
　また、本発明の積層型冷媒分配器は、本発明に係るろう付け用治具を用いて作製された積層型冷媒分配器であって、前記板状体の積層方向の端面に加熱痕が形成されているものである。 Further, the laminated refrigerant distributor of the present invention is a laminated refrigerant distributor manufactured by using the brazing jig according to the present invention, and heating marks are formed on the end faces of the plate-shaped bodies in the stacking direction. It is what has been done.
　本発明によれば、積層型冷媒分配器に対するろう付け処理の際に、複数に分割された第１治具は、第１治具と接する板状体の熱膨張に追従し、第１治具の熱膨張の影響を受けることなく熱膨張する。これにより、ろう付け処理の際の板状体の１１の熱膨張量と熱収縮量とに差異が生じないことから、挿入孔の位置および寸法の変化が抑制されるため、複数の伝熱管を同時に挿入する際の挿入性を向上させることができる。 According to the present invention, during the brazing process on the laminated refrigerant distributor, the first jig divided into a plurality of parts follows the thermal expansion of the plate-like body in contact with the first jig, and the first jig It expands without being affected by the thermal expansion of. As a result, there is no difference between the amount of heat expansion and the amount of heat contraction of 11 of the plate-shaped body during the brazing process, so that changes in the positions and dimensions of the insertion holes are suppressed, so that a plurality of heat transfer tubes can be used. It is possible to improve the insertability when inserting at the same time.
　また、このようなろう付け用治具が用いられることにより、ろう付け処理が行われた積層型冷媒分配器に複数の伝熱管を同時に挿入する際に、積層型冷媒分配器に対する実用上不都合となるつぶれあるいは変形を抑制することができる。 Further, the use of such a brazing jig causes practical inconvenience to the laminated refrigerant distributor when a plurality of heat transfer tubes are simultaneously inserted into the brazed laminated refrigerant distributor. Brazing or deformation can be suppressed.
実施の形態１に係る積層型冷媒分配器を適用した熱交換器の構成の一例を示す概略図である。It is a schematic diagram which shows an example of the structure of the heat exchanger to which the laminated type refrigerant distributor which concerns on Embodiment 1 is applied. 第１分配器の構成の一例を示す分解斜視図である。It is an exploded perspective view which shows an example of the structure of the 1st distributor. 図２に示す第１分配器のＡ部分を拡大した斜視図である。It is an enlarged perspective view of the part A of the 1st distributor shown in FIG. 図２に示す第１分配器のＡ部分を拡大して流路入口側から見た概略図である。It is a schematic view which enlarged the part A of the 1st distributor shown in FIG. 2 and seen from the flow path inlet side. 図２に示す第１分配器の展開図である。It is a development view of the 1st distributor shown in FIG. 図２に示す第１分配器の縦断面図である。It is a vertical sectional view of the 1st distributor shown in FIG. 実施の形態１に係るろう付け用治具の構成の一例を示す概略図である。It is the schematic which shows an example of the structure of the brazing jig which concerns on Embodiment 1. FIG. 積層型冷媒分配器に対するろう付け用治具の配置について説明するための概略図である。It is the schematic for demonstrating the arrangement of the brazing jig with respect to the laminated refrigerant distributor. ろう付け処理の際のろう付け用治具の配置状態を示す概略図である。It is the schematic which shows the arrangement state of the brazing jig at the time of brazing processing. 積層型冷媒分配器のろう付け処理の流れについて説明するための概略図である。It is the schematic for demonstrating the flow of the brazing process of a laminated refrigerant distributor. 積層型冷媒分配器のろう付け処理の流れについて説明するための概略図である。It is the schematic for demonstrating the flow of the brazing process of a laminated refrigerant distributor. 積層型冷媒分配器のろう付け処理の流れについて説明するための概略図である。It is the schematic for demonstrating the flow of the brazing process of a laminated refrigerant distributor. 積層型冷媒分配器のろう付け処理の流れについて説明するための概略図である。It is the schematic for demonstrating the flow of the brazing process of a laminated refrigerant distributor. ろう付け処理後の積層型冷媒分配器の状態を示す概略図である。It is a schematic diagram which shows the state of the laminated type refrigerant distributor after a brazing process. 従来のろう付け用治具の構成の一例を示す概略図である。It is the schematic which shows an example of the structure of the conventional brazing jig. 積層型冷媒分配器に対する従来のろう付け用治具の配置について説明するための概略図である。It is a schematic diagram for demonstrating the arrangement of the conventional brazing jig with respect to a laminated refrigerant distributor. ろう付け処理の際の従来のろう付け用治具の配置状態を示す概略図である。It is a schematic diagram which shows the arrangement state of the conventional brazing jig at the time of brazing processing. 従来のろう付け用治具を用いた場合の、ろう付け処理時における板状体の熱膨張について説明するための模式断面図である。It is a schematic cross-sectional view for demonstrating the thermal expansion of a plate-like body at the time of brazing processing when the conventional brazing jig is used. 従来のろう付け用治具を用いた場合の、ろう付け処理時における板状体の熱膨張について説明するための模式断面図である。It is a schematic cross-sectional view for demonstrating the thermal expansion of a plate-like body at the time of brazing processing when the conventional brazing jig is used. 実施の形態１に係るろう付け用治具を用いた場合の、ろう付け処理時における板状体１１の熱膨張について説明するための模式断面図である。It is a schematic cross-sectional view for demonstrating the thermal expansion of a plate-like body 11 at the time of the brazing process when the brazing jig which concerns on Embodiment 1 is used.
　以下、本発明の実施の形態について、図面を参照して説明する。本発明は、以下の実施の形態に限定されるものではなく、本発明の主旨を逸脱しない範囲で種々に変形することが可能である。また、以下の図面に示すろう付け用治具および積層型冷媒分配器は、本発明のろう付け用治具および積層型冷媒分配器が適用される機器の一例を示すものであり、図面に示されたろう付け用治具および積層型冷媒分配器によって本発明の適用機器が限定されるものではない。また、各図において、同一の符号を付したものは、同一のまた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。なお、各図面では、各構成部材の相対的な寸法関係または形状等が実際のものとは異なる場合がある。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and can be variously modified without departing from the gist of the present invention. Further, the brazing jig and the laminated refrigerant distributor shown in the following drawings are examples of equipment to which the brazing jig and the laminated refrigerant distributor of the present invention are applied, and are shown in the drawings. The applicable equipment of the present invention is not limited by the brazing jig and the laminated refrigerant distributor. Further, in each figure, those having the same reference numerals are the same or equivalent thereof, which are common in the entire text of the specification. In each drawing, the relative dimensional relationship or shape of each component may differ from the actual one.
実施の形態１．
　本実施の形態１に係るろう付け用治具および積層型冷媒分配器について説明する。本実施の形態１に係るろう付け用治具は、例えば、空気調和装置等の冷凍サイクル装置を構成する熱交換器の冷媒流入側または冷媒流出側に設けられた積層型冷媒分配器を作製する際に用いられる。以下では、まず、本実施の形態１に係るろう付け用治具を用いて作製される積層型冷媒分配器について説明する。 Embodiment 1.
The brazing jig and the laminated refrigerant distributor according to the first embodiment will be described. As the brazing jig according to the first embodiment, for example, a laminated refrigerant distributor provided on the refrigerant inflow side or the refrigerant outflow side of the heat exchanger constituting the refrigeration cycle device such as an air conditioner is manufactured. Used when. Hereinafter, first, a laminated refrigerant distributor manufactured by using the brazing jig according to the first embodiment will be described.
［熱交換器１］
　図１は、本実施の形態１に係る積層型冷媒分配器を適用した熱交換器の構成の一例を示す概略図である。なお、図１の例では、冷媒の流れ方向を矢印で示している。図１に示すように、熱交換器１は、第１分配器２、第２分配器３、複数の伝熱管４および複数のフィン５を備えている。 [Heat exchanger 1]
FIG. 1 is a schematic view showing an example of the configuration of a heat exchanger to which the laminated refrigerant distributor according to the first embodiment is applied. In the example of FIG. 1, the flow direction of the refrigerant is indicated by an arrow. As shown in FIG. 1, the heat exchanger 1 includes a first distributor 2, a second distributor 3, a plurality of heat transfer tubes 4, and a plurality of fins 5.
　第１分配器２は、流入する冷媒を分配して流出させる。第１分配器２の内部には、少なくとも１つの分配流路２ａが形成される。分配流路２ａの流入側には、冷媒配管が接続される。分配流路２ａの流出側には複数の伝熱管４が接続される。第１分配器２は、本実施の形態１に係る積層型冷媒分配器が適用される。 The first distributor 2 distributes the inflowing refrigerant and causes it to flow out. At least one distribution flow path 2a is formed inside the first distributor 2. A refrigerant pipe is connected to the inflow side of the distribution flow path 2a. A plurality of heat transfer tubes 4 are connected to the outflow side of the distribution flow path 2a. The laminated refrigerant distributor according to the first embodiment is applied to the first distributor 2.
　第２分配器３は、流入する冷媒を合流させて流出させる。第２分配器３の内部には、合流流路３ａが形成される。合流流路３ａの流入側には、複数の伝熱管４が接続される。合流流路３ａの流出側には冷媒配管が接続される。第２分配器３は、第１分配器２と同様に、本実施の形態１に係る積層型冷媒分配器が適用されてもよいし、第１分配器２と異なるタイプの分配器が適用されてもよい。 The second distributor 3 merges the inflowing refrigerant and causes it to flow out. A merging flow path 3a is formed inside the second distributor 3. A plurality of heat transfer tubes 4 are connected to the inflow side of the merging flow path 3a. A refrigerant pipe is connected to the outflow side of the merging flow path 3a. Similar to the first distributor 2, the laminated refrigerant distributor according to the first embodiment may be applied to the second distributor 3, or a distributor of a type different from that of the first distributor 2 may be applied. You may.
　伝熱管４は、複数の流路が形成された扁平管または円管である。伝熱管４は、例えば、アルミニウム製である。複数の伝熱管４は、例えば、一定の方向に並んで配列されている。伝熱管４には、複数のフィン５が接合されている。フィン５は、例えば、アルミニウム製である。伝熱管４とフィン５とは、例えばろう付けで接合されている。なお、図１の例では、伝熱管４が４本である場合を示しているが、これはこの例に限られない。また、図１の例では、伝熱管４が扁平管である場合について説明するものとする。 The heat transfer tube 4 is a flat tube or a circular tube in which a plurality of flow paths are formed. The heat transfer tube 4 is made of, for example, aluminum. The plurality of heat transfer tubes 4 are arranged side by side in a certain direction, for example. A plurality of fins 5 are joined to the heat transfer tube 4. The fin 5 is made of, for example, aluminum. The heat transfer tube 4 and the fin 5 are joined by brazing, for example. The example of FIG. 1 shows a case where the number of heat transfer tubes 4 is four, but this is not limited to this example. Further, in the example of FIG. 1, a case where the heat transfer tube 4 is a flat tube will be described.
　このように構成された熱交換器１において、冷媒配管を流れる冷媒は、第１分配器２に流入して分配流路２ａで分配され、複数の伝熱管４に流出する。冷媒は、複数の伝熱管４において、例えば、図示しないファンによって供給される空気等の流体と熱交換を行う。複数の伝熱管４を流れる冷媒は、第２分配器３の合流流路３ａに流入して合流し、冷媒配管に流出する。なお、熱交換器１において、冷媒は、逆流可能、つまり第２分配器３から第１分配器２に向かって流れることが可能である。 In the heat exchanger 1 configured in this way, the refrigerant flowing through the refrigerant pipe flows into the first distributor 2, is distributed in the distribution flow path 2a, and flows out to the plurality of heat transfer tubes 4. The refrigerant exchanges heat with a fluid such as air supplied by a fan (not shown) in the plurality of heat transfer tubes 4. The refrigerant flowing through the plurality of heat transfer tubes 4 flows into the merging flow path 3a of the second distributor 3, merges, and flows out to the refrigerant pipe. In the heat exchanger 1, the refrigerant can flow back, that is, can flow from the second distributor 3 toward the first distributor 2.
［第１分配器２の構成］
　積層型冷媒分配器である第１分配器２の構成について説明する。図２は、第１分配器の構成の一例を示す分解斜視図である。図３は、図２に示す第１分配器のＡ部分を拡大した斜視図である。図４は、図２に示す第１分配器のＡ部分を拡大して流路入口側から見た概略図である。なお、図４には、伝熱管４を併せて図示している。 [Structure of 1st distributor 2]
The configuration of the first distributor 2 which is a laminated refrigerant distributor will be described. FIG. 2 is an exploded perspective view showing an example of the configuration of the first distributor. FIG. 3 is an enlarged perspective view of a portion A of the first distributor shown in FIG. FIG. 4 is an enlarged schematic view of a portion A of the first distributor shown in FIG. 2 as viewed from the flow path inlet side. Note that FIG. 4 also shows the heat transfer tube 4.
　図２～図４に示すように、第１分配器２は、長尺状に形成された板状体１１を有する。板状体１１は、ベア材となる第１板状部材１２＿１～第１板状部材１２＿４と、クラッド材となる第２板状部材１３＿１～第２板状部材１３＿３と、が交互に積層されて形成される。板状体１１の積層方向の最も外側には、第１板状部材１２＿１と第１板状部材１２＿４とがそれぞれ積層される。なお、以下では、第１板状部材１２＿１～第１板状部材１２＿４を総称して、第１板状部材１２と記載する場合がある。同様に、第２板状部材１３＿１～第２板状部材１３＿３を総称して、第２板状部材１３と記載する場合がある。 As shown in FIGS. 2 to 4, the first distributor 2 has a plate-shaped body 11 formed in a long shape. In the plate-shaped body 11, the first plate-shaped members 12_1 to 12_1 to be the bare material and the second plate-shaped members 13_1 to the second plate-shaped members 13_3 to be the clad materials are alternately laminated. It is formed. The first plate-shaped member 12_1 and the first plate-shaped member 12_1 are laminated on the outermost side of the plate-shaped body 11 in the stacking direction. In the following, the first plate-shaped member 12_1 to the first plate-shaped member 12_1 may be collectively referred to as the first plate-shaped member 12. Similarly, the second plate-shaped member 13_1 to the second plate-shaped member 13_3 may be collectively referred to as the second plate-shaped member 13.
　第１板状部材１２は、例えば、アルミニウムまたはアルミニウム合金製であり、３ｍｍ程度の厚みを有する部材で形成されている。これは、アルミニウムまたはアルミニウム合金が、従来の熱交換器で使用している銅と比較して、安価かつ軽量であり、また、熱伝導率も高いためである。このように、第１板状部材１２の材料としてアルミニウムまたはアルミニウム合金が用いられることにより、原価低減を効果的に行うことができる。なお、第１板状部材１２には、ろう材が塗布されない。 The first plate-shaped member 12 is made of, for example, aluminum or an aluminum alloy, and is made of a member having a thickness of about 3 mm. This is because aluminum or an aluminum alloy is cheaper and lighter than copper used in conventional heat exchangers, and has high thermal conductivity. As described above, by using aluminum or an aluminum alloy as the material of the first plate-shaped member 12, cost reduction can be effectively performed. The brazing material is not applied to the first plate-shaped member 12.
　第１板状部材１２のそれぞれには、分配流路２ａとなる貫通孔１２ａ＿１～貫通孔１２ａ＿４が形成される。貫通孔１２ａ＿１～貫通孔１２ａ＿４は、第１板状部材１２の表裏を貫通する。 Through holes 12a_1 to 12a_4 serving as distribution flow paths 2a are formed in each of the first plate-shaped members 12. The through holes 12a_1 to 12a_4 penetrate the front and back surfaces of the first plate-shaped member 12.
　第１板状部材１２と第２板状部材１３とが積層されると、貫通孔１２ａ＿１～貫通孔１２ａ＿３は、分配流路２ａの一部として機能する。貫通孔１２ａ＿１は、冷媒等の流体が流入する流体入口部として機能する。貫通孔１２ａ＿３の末端は、冷媒等の流体が流出する流体出口部として機能する。貫通孔１２ａ＿４は、伝熱管挿入部２ｂとして機能するため、冷媒等の流体が流れない。 When the first plate-shaped member 12 and the second plate-shaped member 13 are laminated, the through holes 12a_1 to 12a_3 function as a part of the distribution flow path 2a. The through hole 12a_1 functions as a fluid inlet portion into which a fluid such as a refrigerant flows. The end of the through hole 12a_3 functions as a fluid outlet portion through which a fluid such as a refrigerant flows out. Since the through hole 12a_4 functions as the heat transfer tube insertion portion 2b, a fluid such as a refrigerant does not flow.
　第２板状部材１３は、例えば、アルミニウムまたはアルミニウム合金製であり、第１板状部材１２と比較して薄く（例えば、１ｍｍ程度）形成されている。第２板状部材１３の少なくとも表裏面には、ろう材が塗布される。第２板状部材１３のそれぞれには、分配流路２ａとなる貫通孔１３ａ＿１および貫通孔１３ａ＿２が形成される。貫通孔１３ａ＿１～貫通孔１３ａ＿３は、第２板状部材１３の表裏を貫通する。 The second plate-shaped member 13 is made of, for example, aluminum or an aluminum alloy, and is formed thinner (for example, about 1 mm) than the first plate-shaped member 12. A brazing material is applied to at least the front and back surfaces of the second plate-shaped member 13. Through holes 13a_1 and through holes 13a_2 serving as distribution flow paths 2a are formed in each of the second plate-shaped members 13. The through holes 13a_1 to 13a_3 penetrate the front and back surfaces of the second plate-shaped member 13.
　なお、第１板状部材１２および第２板状部材１３は、この例に限られず、例えばステンレス製であってもよい。積層型冷媒分配器である第１分配器２のろう付け処理における加熱に対して十分な耐熱性を有していれば、どのような材料が用いられてもよい。 The first plate-shaped member 12 and the second plate-shaped member 13 are not limited to this example, and may be made of stainless steel, for example. Any material may be used as long as it has sufficient heat resistance to heating in the brazing treatment of the first distributor 2 which is a laminated refrigerant distributor.
　第１板状部材１２と第２板状部材１３とが積層されると、貫通孔１３ａ＿１および貫通孔１３ａ＿２は、分配流路２ａの一部として機能する。貫通孔１３ａ＿３は、伝熱管挿入部２ｂとして機能するため、冷媒等の流体が流れない。 When the first plate-shaped member 12 and the second plate-shaped member 13 are laminated, the through hole 13a_1 and the through hole 13a_2 function as a part of the distribution flow path 2a. Since the through hole 13a_3 functions as the heat transfer tube insertion portion 2b, a fluid such as a refrigerant does not flow.
　第１板状部材１２＿１に形成される貫通孔１２ａ＿１、第２板状部材１３＿１に形成される貫通孔１３ａ＿１、および、第２板状部材１３＿２に形成される貫通孔１３ａ＿２は、流路断面円形状に貫通形成される。流路断面とは、流路を流体の流れと直交する方向で切断した断面である。 The through hole 12a_1 formed in the first plate-shaped member 12_1, the through hole 13a_1 formed in the second plate-shaped member 13_1, and the through hole 13a_1 formed in the second plate-shaped member 13_2 have a circular cross-sectional shape of the flow path. It is formed through. The flow path cross section is a cross section obtained by cutting the flow path in a direction orthogonal to the flow of the fluid.
　流体入口部として機能する貫通孔１２ａ＿１には、入口管としての冷媒配管が接続される。例えば、第１板状部材１２＿１の冷媒の流入側の面に口金等が設けられ、その口金等を介して冷媒配管が接続されてもよい。また、貫通孔１２ａ＿１の内周面が、冷媒配管の外周面と嵌合する形状であり、口金等を用いずに、貫通孔１２ａ＿１に冷媒配管が直接接続されてもよい。 A refrigerant pipe as an inlet pipe is connected to the through hole 12a_1 that functions as a fluid inlet portion. For example, a base or the like may be provided on the surface of the first plate-shaped member 12_1 on the inflow side of the refrigerant, and the refrigerant pipe may be connected via the base or the like. Further, the inner peripheral surface of the through hole 12a_1 may be shaped to fit with the outer peripheral surface of the refrigerant pipe, and the refrigerant pipe may be directly connected to the through hole 12a_1 without using a base or the like.
　第１板状部材１２＿２に形成される貫通孔１２ａ＿２は、例えば、流路断面Ｚ字状に貫通形成される。第１板状部材１２＿２の冷媒が流入する側に積層される第２板状部材１３＿１の貫通孔１３ａ＿１は、貫通孔１２ａ＿２の中心と対向する位置に形成される。第１板状部材１２＿２の冷媒が流出する側に積層される第２板状部材１３＿２の貫通孔１３ａ＿２は、貫通孔１２ａ＿２の端部と対向する位置に形成される。 The through hole 12a_2 formed in the first plate-shaped member 12_2 is formed through, for example, in a Z-shaped cross section of the flow path. The through hole 13a_1 of the second plate-shaped member 13_1 laminated on the side where the refrigerant of the first plate-shaped member 12_2 flows in is formed at a position facing the center of the through hole 12a_2. The through hole 13a_2 of the second plate-shaped member 13_2, which is laminated on the side where the refrigerant of the first plate-shaped member 12_2 flows out, is formed at a position facing the end of the through hole 12a_2.
　第１板状部材１２＿３に形成される貫通孔１２ａ＿３は、例えば、流路断面Ｚ字状部分と流路断面直線状部分とが組み合わされた形状に貫通形成される。なお、以下の説明において、流路断面Ｚ字状部分をＺ字状部１１２Ａと称し、流路断面直線状部分を直線状部１１２Ｂと称するものとする。 The through hole 12a_3 formed in the first plate-shaped member 12_3 is formed through, for example, in a shape in which a Z-shaped portion of the flow path cross section and a linear portion of the flow path cross section are combined. In the following description, the Z-shaped portion of the flow path cross section will be referred to as the Z-shaped portion 112A, and the linear portion of the flow path cross section will be referred to as the linear portion 112B.
　図３に示すように、直線状部１１２Ｂは、Ｚ字状部１１２Ａの両端部に連通している。すなわち、直線状部１１２Ｂは、貫通孔１２ａ＿３の末端、つまり分配流路２ａの末端に位置する空間部として形成され、流体出口部として機能する部分に相当する。 As shown in FIG. 3, the linear portion 112B communicates with both ends of the Z-shaped portion 112A. That is, the linear portion 112B is formed as a space portion located at the end of the through hole 12a_3, that is, the end of the distribution flow path 2a, and corresponds to a portion that functions as a fluid outlet portion.
　なお、図３において紙面上側に位置する直線状部１１２Ｂの下辺にＺ字状部１１２Ａの紙面上側の端部が連通している。また、図３において紙面下側に位置する直線状部１１２Ｂの上辺にＺ字状部１１２Ａの紙面下側の端部が連通している。２つの直線状部１１２Ｂは互いに平行である。さらに、図４に示すように、直線状部１１２Ｂの開口面積は、伝熱管４の先端部４ａの開口面積よりも大きい。 In FIG. 3, the upper end of the Z-shaped portion 112A communicates with the lower side of the linear portion 112B located on the upper side of the paper surface. Further, in FIG. 3, the lower end of the Z-shaped portion 112A communicates with the upper side of the linear portion 112B located on the lower side of the paper surface. The two linear portions 112B are parallel to each other. Further, as shown in FIG. 4, the opening area of the linear portion 112B is larger than the opening area of the tip portion 4a of the heat transfer tube 4.
　第１板状部材１２＿３の冷媒が流入する側に積層される第２板状部材１３＿２の貫通孔１３ａ＿２は、貫通孔１２ａ＿３の中心と対向する位置に形成される。第１板状部材１２＿３の第２板状部材１３＿２とは反対側に積層される第２板状部材１３＿３の貫通孔１３ａ＿３は、貫通孔１２ａ＿３の直線状部１１２Ｂと対向する位置に形成される。 The through hole 13a_2 of the second plate-shaped member 13_2 laminated on the side where the refrigerant of the first plate-shaped member 12_3 flows in is formed at a position facing the center of the through hole 12a_3. The through hole 13a_3 of the second plate-shaped member 13_3 laminated on the side opposite to the second plate-shaped member 13_2 of the first plate-shaped member 12_3 is formed at a position facing the linear portion 112B of the through hole 12a_3.
　第１板状部材１２と第２板状部材１３とが積層されると、第１板状部材１２に形成されている貫通孔と、第２板状部材１３に形成されている貫通孔と、が連通して分配流路２ａが形成される。つまり、第１板状部材１２と第２板状部材１３とが積層されると、隣接する貫通孔同士が連通するとともに、連通する貫通孔以外の部分が隣接する第１板状部材１２または第２板状部材１３に閉塞され、分配流路２ａが形成されることになる。なお、第１分配器２では、分配流路２ａが、１つの流体入口部に対して４つの流体出口部を有している場合を例に図示しているが、分岐数を４分岐に限定するものではない。 When the first plate-shaped member 12 and the second plate-shaped member 13 are laminated, a through hole formed in the first plate-shaped member 12 and a through hole formed in the second plate-shaped member 13 become available. A distribution flow path 2a is formed by communicating with each other. That is, when the first plate-shaped member 12 and the second plate-shaped member 13 are laminated, the adjacent through holes communicate with each other, and the portion other than the communicating through holes is adjacent to the first plate-shaped member 12 or the first plate-shaped member 12. It is closed by the two-plate-shaped member 13 to form the distribution flow path 2a. In the first distributor 2, the case where the distribution flow path 2a has four fluid outlets for one fluid inlet is shown as an example, but the number of branches is limited to four. It is not something to do.
　図２に示すように、第１板状部材１２＿４に形成される貫通孔１２ａ＿４、および、第２板状部材１３＿３に形成される貫通孔１３ａ＿３は、貫通孔１２ａ＿３の端部である直線状部１１２Ｂの対面方向に形成され、伝熱管４の先端部４ａが挿入される伝熱管挿入部２ｂとして機能する。つまり、貫通孔１２ａ＿４、および、貫通孔１３ａ＿３は、伝熱管４の延長線上に位置する直線状部１１２Ｂに対向する位置に形成されるようになっており、ここに伝熱管４を挿入することで伝熱管４が第１分配器２に接続される。 As shown in FIG. 2, the through hole 12a_4 formed in the first plate-shaped member 12_4 and the through hole 13a_3 formed in the second plate-shaped member 13_3 are linear portions 112B which are the ends of the through hole 12a_3. It is formed in the facing direction of the heat transfer tube 4 and functions as a heat transfer tube insertion portion 2b into which the tip end portion 4a of the heat transfer tube 4 is inserted. That is, the through holes 12a_4 and the through holes 13a_3 are formed at positions facing the linear portion 112B located on the extension line of the heat transfer tube 4, and by inserting the heat transfer tube 4 into the through holes 12a_4 and the through holes 13a_3. The heat transfer tube 4 is connected to the first distributor 2.
　また、伝熱管４の先端部４ａは、第２板状部材１３＿３の貫通孔１３ａ＿３の位置であってもよく、第１板状部材１２＿３の貫通孔１２ａ＿３の直線状部１１２Ｂの位置であってもよい。つまり、伝熱管４の先端部４ａは、第２板状部材１３＿２に接触しない位置であればよい。第１板状部材１２＿４の貫通孔１２ａ＿４の内周面は、伝熱管４の外周面に嵌合される。その嵌合は、加熱されたろう材が毛細管現象によって染み込む程度の隙間を有するとよい。 Further, the tip portion 4a of the heat transfer tube 4 may be at the position of the through hole 13a_3 of the second plate-shaped member 13_3, or may be the position of the linear portion 112B of the through hole 12a_3 of the first plate-shaped member 12_3. Good. That is, the tip portion 4a of the heat transfer tube 4 may be at a position where it does not come into contact with the second plate-shaped member 13_2. The inner peripheral surface of the through hole 12a_4 of the first plate-shaped member 12_4 is fitted to the outer peripheral surface of the heat transfer tube 4. The fitting should have a gap such that the heated brazing material is infiltrated by the capillary phenomenon.
　図５は、図２に示す第１分配器の展開図である。図６は、図２に示す第１分配器２の縦断面図である。なお、図６では、説明の便宜上、それぞれ板状体１１の厚さを概略的に均一として図示している。また、図６では、流体の流れ方向に沿って切断した断面を示している。 FIG. 5 is a development view of the first distributor shown in FIG. FIG. 6 is a vertical sectional view of the first distributor 2 shown in FIG. In FIG. 6, for convenience of explanation, the thickness of each plate-shaped body 11 is shown as being substantially uniform. Further, FIG. 6 shows a cross section cut along the flow direction of the fluid.
　図５および図６に示すように、冷媒配管を流れてきた冷媒は、第１板状部材１２＿１の貫通孔１２ａ＿１を流体入口部として、第１分配器２の内部に流入する。貫通孔１２ａ＿１から流入した冷媒は、第２板状部材１３＿１の貫通孔１３ａ＿１に流入する。 As shown in FIGS. 5 and 6, the refrigerant flowing through the refrigerant pipe flows into the inside of the first distributor 2 with the through hole 12a_1 of the first plate-shaped member 12_1 as the fluid inlet portion. The refrigerant that has flowed in through the through hole 12a_1 flows into the through hole 13a_1 of the second plate-shaped member 13_1.
　第１板状部材１２＿１の貫通孔１２ａ＿１から第２板状部材１３＿１の貫通孔１３ａ＿１に流入した冷媒は、第１板状部材１２＿２の貫通孔１２ａ＿２の中心に流入する。第１板状部材１２＿２の貫通孔１２ａ＿２の中心に流入した冷媒は、隣接して積層される第２板状部材１３＿２の表面に当たって分岐し、第１板状部材１２＿２の貫通孔１２ａ＿２の端部に流れる。第１板状部材１２＿２の貫通孔１２ａ＿２の端部に至った冷媒は、第２板状部材１３＿２の貫通孔１３ａ＿２を通過して、第１板状部材１２＿３の貫通孔１２ａ＿３の中心に流入する。 The refrigerant that has flowed from the through hole 12a_1 of the first plate-shaped member 12_1 into the through hole 13a_1 of the second plate-shaped member 13_1 flows into the center of the through hole 12a_2 of the first plate-shaped member 12_2. The refrigerant that has flowed into the center of the through hole 12a_2 of the first plate-shaped member 12_2 hits the surface of the second plate-shaped member 13_2 that is laminated adjacently and branches, and reaches the end of the through hole 12a_2 of the first plate-shaped member 12_2. It flows. The refrigerant that has reached the end of the through hole 12a_2 of the first plate-shaped member 12_2 passes through the through hole 13a_2 of the second plate-shaped member 13_2 and flows into the center of the through hole 12a_3 of the first plate-shaped member 12_3.
　第１板状部材１２＿３の貫通孔１２ａ＿３の中心に流入した冷媒は、隣接して積層される第２板状部材１３＿３の表面に当たって分岐し、第１板状部材１２＿３の貫通孔１２ａ＿３の端部に流れる。第１板状部材１２＿３の貫通孔１２ａ＿３の端部である直線状部１１２Ｂは流体出口部として機能しており、第１板状部材１２＿３の貫通孔１２ａ＿３の端部に至った冷媒は、貫通孔１３ａ＿３または貫通孔１２ａ＿３内に位置する伝熱管４の先端部４ａから伝熱管４の内部に流入する。 The refrigerant that has flowed into the center of the through hole 12a_3 of the first plate-shaped member 12_3 hits the surface of the second plate-shaped member 13_3 that is laminated adjacently and branches, and reaches the end of the through hole 12a_3 of the first plate-shaped member 12_3. It flows. The linear portion 112B, which is the end portion of the through hole 12a_3 of the first plate-shaped member 12_3, functions as a fluid outlet portion, and the refrigerant reaching the end portion of the through hole 12a_3 of the first plate-shaped member 12_3 is a through hole. It flows into the inside of the heat transfer tube 4 from the tip portion 4a of the heat transfer tube 4 located in 13a_3 or the through hole 12a_3.
　伝熱管４に流入した冷媒は、第２板状部材１３＿３の貫通孔１３ａ＿３の内部および第１板状部材１２＿４の貫通孔１２ａ＿４の内部に位置する領域を通過して、伝熱管４のフィン５が接合された領域に流入する。 The refrigerant that has flowed into the heat transfer tube 4 passes through a region located inside the through hole 13a_3 of the second plate-shaped member 13_3 and inside the through hole 12a_4 of the first plate-shaped member 12_4, and the fin 5 of the heat transfer tube 4 passes through the region. It flows into the joined area.
［ろう付け用治具５０の構成］
　次に、本実施の形態１に係るろう付け用治具について説明する。本実施の形態１に係るろう付け用治具は、上述した複数の板状体１１を積層した積層型冷媒分配器を作製する際に用いられる。図７は、本実施の形態１に係るろう付け用治具の構成の一例を示す概略図である。図８は、積層型冷媒分配器に対するろう付け用治具の配置について説明するための概略図である。図９は、ろう付け処理の際のろう付け用治具の配置状態を示す概略図である。 [Structure of Brazing Jig 50]
Next, the brazing jig according to the first embodiment will be described. The brazing jig according to the first embodiment is used when manufacturing a laminated refrigerant distributor in which the plurality of plate-shaped bodies 11 described above are laminated. FIG. 7 is a schematic view showing an example of the configuration of the brazing jig according to the first embodiment. FIG. 8 is a schematic view for explaining the arrangement of the brazing jig with respect to the laminated refrigerant distributor. FIG. 9 is a schematic view showing an arrangement state of the brazing jig during the brazing process.
　図７に示すように、ろう付け用治具５０は、板状の第１治具５１および第２治具５２で構成されている。ろう付け用治具５０は、図８および図９に示すように、第１治具５１と第２治具５２とで、複数の板状体１１で形成されたろう付け前の積層型冷媒分配器６０を挟み込むように使用される。そして、第１治具５１、第２治具５２および積層型冷媒分配器６０は、ろう付け処理の際に、加圧治具７０によって加圧されて固定される。なお、第１治具５１および第２治具５２は、板状に限られず、例えばブロック状に形成されてもよい。 As shown in FIG. 7, the brazing jig 50 is composed of a plate-shaped first jig 51 and a second jig 52. As shown in FIGS. 8 and 9, the brazing jig 50 is a laminated refrigerant distributor before brazing, which is formed of a plurality of plate-shaped bodies 11 by the first jig 51 and the second jig 52. It is used to sandwich 60. Then, the first jig 51, the second jig 52, and the laminated refrigerant distributor 60 are pressed and fixed by the pressurizing jig 70 during the brazing process. The first jig 51 and the second jig 52 are not limited to a plate shape, and may be formed in a block shape, for example.
　第１治具５１は、例えばステンレス製である。第１治具５１は、長尺状の板状体１１の長手方向（図７のｘ方向）に複数に分割されて形成されている。図７の例は、第１治具５１が２つの分割第１治具５１Ａおよび５１Ｂに分割されている場合を示す。分割第１治具５１Ａおよび５１Ｂは、幅（ｙ方向の長さ）が積層型冷媒分配器６０の短手方向の長さと略同等の長さとなるように形成されている。 The first jig 51 is made of, for example, stainless steel. The first jig 51 is formed by being divided into a plurality of pieces in the longitudinal direction (x direction in FIG. 7) of the elongated plate-shaped body 11. The example of FIG. 7 shows a case where the first jig 51 is divided into two divided first jigs 51A and 51B. The first division jigs 51A and 51B are formed so that the width (length in the y direction) is substantially the same as the length in the lateral direction of the laminated refrigerant distributor 60.
　積層型冷媒分配器６０のろう付け処理が行われる場合、第１治具５１は、図８に示すように、積層された複数の板状体１１の積層方向（ｚ方向）の端面のうち、扁平管である伝熱管４が接続される冷媒出口側の端面に接するように配置される。この場合、第１治具５１は、長手方向が積層型冷媒分配器６０の伝熱管挿入部２ｂが並んで配列されている板状体１１の長手方向と一致するように配置される。 When the laminated refrigerant distributor 60 is brazed, the first jig 51 uses, as shown in FIG. 8, among the end faces of the plurality of laminated plate-like bodies 11 in the stacking direction (z direction). The heat transfer tube 4 which is a flat tube is arranged so as to be in contact with the end face on the refrigerant outlet side to which the heat transfer tube 4 is connected. In this case, the first jig 51 is arranged so that the longitudinal direction coincides with the longitudinal direction of the plate-shaped body 11 in which the heat transfer tube insertion portions 2b of the laminated refrigerant distributor 60 are arranged side by side.
　また、第１治具５１には、第１貫通孔５１ａが形成されている。第１貫通孔５１ａは、積層型冷媒分配器６０の板状体１１に設けられた挿入孔である伝熱管挿入部２ｂに対応する位置に設けられ、積層型冷媒分配器６０の伝熱管挿入部２ｂの数に応じて、１または複数設けられる。板状体１１の第１貫通孔５１ａが設けられていない部分は、後述する加圧治具７０によって加圧される加圧面とされる。 Further, the first jig 51 is formed with a first through hole 51a. The first through hole 51a is provided at a position corresponding to the heat transfer tube insertion portion 2b, which is an insertion hole provided in the plate-shaped body 11 of the laminated refrigerant distributor 60, and is provided at a position corresponding to the heat transfer tube insertion portion of the laminated refrigerant distributor 60. One or more are provided depending on the number of 2b. The portion of the plate-shaped body 11 where the first through hole 51a is not provided is a pressurized surface to be pressurized by the pressurizing jig 70 described later.
　第２治具５２は、例えばステンレス製であり、長尺状に形成されている。第２治具５２は、ｘ方向およびｙ方向のそれぞれの長さが積層型冷媒分配器６０の長手方向および短手方向のそれぞれの長さと略同等の長さとなるように形成されている。積層型冷媒分配器６０のろう付け処理が行われる場合、第２治具５２は、図８に示すように、積層された複数の板状体１１の積層方向（ｚ方向）の端面のうち、円管が接続される冷媒入口側の端面に接するように配置される。 The second jig 52 is made of stainless steel, for example, and is formed in a long shape. The second jig 52 is formed so that the lengths in the x direction and the y direction are substantially the same as the lengths in the longitudinal direction and the lateral direction of the laminated refrigerant distributor 60. When the laminated refrigerant distributor 60 is brazed, the second jig 52 uses, as shown in FIG. 8, among the end faces of the plurality of laminated plate-like bodies 11 in the stacking direction (z direction). It is arranged so as to be in contact with the end face on the refrigerant inlet side to which the circular pipe is connected.
　また、第２治具５２には、第２貫通孔５２ａが形成されている。第２貫通孔５２ａは、第２治具５２が積層型冷媒分配器６０に接して配置される際に、積層型冷媒分配器６０の板状体１１に取り付けられた、冷媒入口側の配管である円管を避けるために設けられている。 Further, the second jig 52 is formed with a second through hole 52a. The second through hole 52a is a pipe on the refrigerant inlet side attached to the plate-shaped body 11 of the laminated refrigerant distributor 60 when the second jig 52 is arranged in contact with the laminated refrigerant distributor 60. It is provided to avoid a certain circular pipe.
　ろう付け用治具５０を構成する第１治具５１および第２治具５２は、上述したようにステンレス製である。これは、耐熱性が高く、ろう付け処理が行われる際の高温下でも加圧治具７０による力を積層型冷媒分配器６０に対して均等に印圧できるためである。なお、ろう付け用治具５０の材質は、ろう付け処理の際の温度に対して治具の機械的強度が低下しない材質であれば、この例に限られず、いずれの材料が用いられてもよい。耐熱性は、材料の物性を維持する性質を示し、例えば、材料の融点あるいは熱膨張係数などによって判断することができる。 The first jig 51 and the second jig 52 constituting the brazing jig 50 are made of stainless steel as described above. This is because the heat resistance is high and the force of the pressurizing jig 70 can be evenly applied to the laminated refrigerant distributor 60 even at a high temperature when the brazing process is performed. The material of the brazing jig 50 is not limited to this example as long as the mechanical strength of the jig does not decrease with respect to the temperature during the brazing process, and any material may be used. Good. The heat resistance shows the property of maintaining the physical properties of the material, and can be determined by, for example, the melting point or the coefficient of thermal expansion of the material.
　また、板状体１１とろう付け用治具５０とは、異なる材料が用いられると好ましく、さらに、ろう付け用治具５０は、板状体１１と比較してより耐熱性が高い材料が用いられるとより好ましい。これは、炉内で積層型冷媒分配器６０のろう付け処理が行われる際に、加熱によって板状体１１の変形が生じる可能性がある場合でも、より耐熱性の高いろう付け用治具５０によって板状体１１の変形を抑制できるためである。 Further, it is preferable that a different material is used between the plate-shaped body 11 and the brazing jig 50, and further, the brazing jig 50 uses a material having higher heat resistance than the plate-shaped body 11. It is more preferable to be brazed. This is a brazing jig 50 having higher heat resistance even when the plate-like body 11 may be deformed by heating when the brazing treatment of the laminated refrigerant distributor 60 is performed in the furnace. This is because the deformation of the plate-shaped body 11 can be suppressed.
　加圧治具７０は、積層型冷媒分配器６０に対して第１治具５１および第２治具５２が配置された状態で、第１治具５１側および第２治具５２側の加圧面から中心方向（ｚ方向）に加圧し、第１治具５１、第２治具５２および複数の板状体１１を固定する。 The pressurizing jig 70 has a pressurizing surface on the first jig 51 side and the second jig 52 side in a state where the first jig 51 and the second jig 52 are arranged with respect to the laminated refrigerant distributor 60. The first jig 51, the second jig 52, and the plurality of plate-shaped bodies 11 are fixed by applying pressure in the central direction (z direction).
　加圧治具７０は、把持部７１を有している。把持部７１は、例えば弾性力によって開閉動作し、ろう付け前の積層型冷媒分配器６０が第１治具５１および第２治具５２によって挟まれた状態で、第１治具５１および第２治具５２の加圧面を把持する。 The pressurizing jig 70 has a grip portion 71. The grip portion 71 is opened and closed by, for example, an elastic force, and the first jig 51 and the second jig 51 and the second jig 51 are sandwiched between the first jig 51 and the second jig 52 with the laminated refrigerant distributor 60 before brazing. The pressure surface of the jig 52 is gripped.
　なお、加圧治具７０は、この例に限られない。第１治具５１および第２治具５２が取り付けられた積層型冷媒分配器６０を加圧することができ、積層型冷媒分配器６０のろう付け処理の際の熱に対する耐熱性を有していれば、どのような形状および材質のものでもよい。 The pressurizing jig 70 is not limited to this example. The laminated refrigerant distributor 60 to which the first jig 51 and the second jig 52 are attached can be pressurized, and has heat resistance to heat during the brazing process of the laminated refrigerant distributor 60. For example, it may be of any shape and material.
［積層型冷媒分配器６０のろう付け処理］
　次に、積層型冷媒分配器６０のろう付け処理について説明する。図１０～図１３は、積層型冷媒分配器のろう付け処理の流れについて説明するための概略図である。 [Brazing process of laminated refrigerant distributor 60]
Next, the brazing process of the laminated refrigerant distributor 60 will be described. 10 to 13 are schematic views for explaining the flow of the brazing process of the laminated refrigerant distributor.
　まず、図１０に示すように、第１板状部材１２＿１～１２＿６と、第２板状部材１３＿１～１３＿５とが交互に配置される。第１板状部材１２＿１の貫通孔１２ａ＿１には、入口管である冷媒配管がろう付けによって予め取り付けられている。次に、図１１に示すように、第１板状部材１２＿１～１２＿６と、第２板状部材１３＿１～１３＿５とが積層される。これにより、ろう付け前の積層型冷媒分配器６０が形成される。 First, as shown in FIG. 10, the first plate-shaped members 12_1 to 12_6 and the second plate-shaped members 13_1 to 13_5 are alternately arranged. A refrigerant pipe, which is an inlet pipe, is previously attached to the through hole 12a_1 of the first plate-shaped member 12_1 by brazing. Next, as shown in FIG. 11, the first plate-shaped members 12_1 to 12_6 and the second plate-shaped members 13_1 to 13_5 are laminated. As a result, the laminated refrigerant distributor 60 before brazing is formed.
　第１板状部材１２＿１～１２＿６と、第２板状部材１３＿１～１３＿５とが積層されると、図１２に示すように、第１治具５１および第２治具５２が、積層された積層型冷媒分配器６０を挟み込むように配置される。第１治具５１の分割第１治具５１Ａは、長手方向の一方の端面が積層型冷媒分配器６０の長手方向の一方の端面と一致するように配置される。また、第１治具５１の分割第１治具５１Ｂは、長手方向の他方の端面が積層型冷媒分配器６０の長手方向の他方の端面と一致するように配置される。第２治具５２は、第２貫通孔５２ａを介して、第１板状部材１２＿１に取り付けられた入口管を避けるようにして配置される。 When the first plate-shaped members 12_1 to 12_6 and the second plate-shaped members 13_1 to 13_5 are laminated, as shown in FIG. 12, the first jig 51 and the second jig 52 are laminated. It is arranged so as to sandwich the refrigerant distributor 60. Division of the first jig 51 The first jig 51A is arranged so that one end face in the longitudinal direction coincides with one end face in the longitudinal direction of the laminated refrigerant distributor 60. Further, the divided first jig 51B of the first jig 51 is arranged so that the other end face in the longitudinal direction coincides with the other end face in the longitudinal direction of the laminated refrigerant distributor 60. The second jig 52 is arranged so as to avoid the inlet pipe attached to the first plate-shaped member 12_1 through the second through hole 52a.
　そして、第１治具５１および第２治具５２の加圧面が加圧治具７０の把持部７１によって加圧される。これにより、第１治具５１、積層型冷媒分配器６０および第２治具５２がそれぞれ接した状態で加圧治具７０によって固定される。 Then, the pressurizing surfaces of the first jig 51 and the second jig 52 are pressurized by the grip portion 71 of the pressurizing jig 70. As a result, the first jig 51, the laminated refrigerant distributor 60, and the second jig 52 are fixed by the pressurizing jig 70 in contact with each other.
　次に、ろう付け用治具５０が取り付けられた積層型冷媒分配器６０は、炉内で加熱される。これにより、第２板状部材１３に塗布されたろうが溶融し、第１板状部材１２および第２板状部材１３が接合される。そして、図１３に示すように、ろう付けされた積層型冷媒分配器６０に対して、出口管としての伝熱管４が第１板状部材１２＿６の伝熱管挿入部２ｂに挿入され、ろう材によってろう付けされる。 Next, the laminated refrigerant distributor 60 to which the brazing jig 50 is attached is heated in the furnace. As a result, the wax applied to the second plate-shaped member 13 is melted, and the first plate-shaped member 12 and the second plate-shaped member 13 are joined. Then, as shown in FIG. 13, the heat transfer tube 4 as an outlet pipe is inserted into the heat transfer tube insertion portion 2b of the first plate-shaped member 12_6 with respect to the brazed laminated refrigerant distributor 60, and the brazed material is used. Brazed.
　図１４は、ろう付け処理後の積層型冷媒分配器の状態を示す概略図である。図１４に示すように、積層型冷媒分配器６０に対するろう付け処理が完了すると、ろう付け処理の加熱により、積層型冷媒分配器６０の表面には加熱痕８０が形成される。これは、ろう付け処理の際に、積層型冷媒分配器６０の外面側の第１板状部材１２＿１および１２＿６の表面のうち、分割第１治具５１Ａおよび５１Ｂが接している部分と、それ以外の部分とで、酸化の仕方が異なるためである。ここでいう「表面」は、積層型冷媒分配器６０における板状体１１の積層方向の端面を示す。 FIG. 14 is a schematic view showing the state of the laminated refrigerant distributor after the brazing treatment. As shown in FIG. 14, when the brazing treatment for the laminated refrigerant distributor 60 is completed, heating marks 80 are formed on the surface of the laminated refrigerant distributor 60 by heating the brazing treatment. This is the portion of the surfaces of the first plate-shaped members 12_1 and 12_6 on the outer surface side of the laminated refrigerant distributor 60 that are in contact with the divided first jigs 51A and 51B during the brazing process, and other parts. This is because the method of oxidation is different from that of the part. The “surface” here refers to the end face of the plate-shaped body 11 in the laminated refrigerant distributor 60 in the laminated direction.
　具体的には、第１板状部材１２＿１および１２＿６の表面のうち、分割第１治具５１Ａおよび５１Ｂが接している部分は、炉内で空気に直接触れることがないため、酸化が抑制される。これに対して、第１板状部材１２＿１および１２＿６の表面のうち、分割第１治具５１Ａおよび５１Ｂが接している部分以外の部分は、炉内で空気に触れるため、酸化が促進される。 Specifically, on the surfaces of the first plate-shaped members 12_1 and 12_6, the portions in contact with the divided first jigs 51A and 51B do not come into direct contact with air in the furnace, so that oxidation is suppressed. .. On the other hand, on the surfaces of the first plate-shaped members 12_1 and 12_6, the parts other than the parts in contact with the first divided jigs 51A and 51B come into contact with air in the furnace, so that oxidation is promoted.
　このように、ろう付けされた積層型冷媒分配器６０における板状体１１の積層方向の端面である表面の状態を確認することにより、どのようなろう付け用治具が用いられたのかを判断することができる。 In this way, by confirming the state of the surface of the brazed laminated refrigerant distributor 60, which is the end surface of the plate-shaped body 11 in the laminating direction, it is possible to determine what kind of brazing jig was used. can do.
［板状体１１の熱膨張］
　ろう付け処理時の板状体１１の熱膨張について説明する。背景技術の項でも説明したように、従来のろう付け処理の際には、複数の板状体１１の線膨張率と、従来のろう付け用治具の線膨張率との差により、伝熱管４が挿入される伝熱管挿入部２ｂの位置および寸法が変化する。そのため、ろう付けされた積層型冷媒分配器に複数の伝熱管４を同時に挿入する際に、伝熱管４の挿入性が悪化する。 [Thermal expansion of the plate-shaped body 11]
The thermal expansion of the plate-shaped body 11 during the brazing process will be described. As explained in the section of background technology, in the conventional brazing process, the heat transfer tube is determined by the difference between the linear expansion coefficient of the plurality of plate-shaped bodies 11 and the linear expansion coefficient of the conventional brazing jig. The position and size of the heat transfer tube insertion portion 2b into which the 4 is inserted changes. Therefore, when a plurality of heat transfer tubes 4 are simultaneously inserted into the brazed laminated refrigerant distributor, the insertability of the heat transfer tubes 4 deteriorates.
　そこで、本実施の形態１では、ろう付け処理の際に生じる板状体１１の熱膨張の影響を低減し、ろう付けされた積層型冷媒分配器６０に複数の伝熱管４を同時に挿入する際の伝熱管４の挿入性を向上させる。以下では、本実施の形態１に係るろう付け用治具５０を用いた場合の板状体１１の熱膨張について説明する前に、従来のろう付け用治具を用いた場合の板状体１１の熱膨張について説明する。 Therefore, in the first embodiment, when the influence of thermal expansion of the plate-like body 11 generated during the brazing process is reduced and a plurality of heat transfer tubes 4 are simultaneously inserted into the brazed laminated refrigerant distributor 60. The insertability of the heat transfer tube 4 of the above is improved. In the following, before explaining the thermal expansion of the plate-shaped body 11 when the brazing jig 50 according to the first embodiment is used, the plate-shaped body 11 when the conventional brazing jig is used The thermal expansion of the above will be described.
（従来のろう付け用治具１５０）
　図１５は、従来のろう付け用治具の構成の一例を示す概略図である。図１６は、積層型冷媒分配器に対する従来のろう付け用治具の配置について説明するための概略図である。図１７は、ろう付け処理の際の従来のろう付け用治具の配置状態を示す概略図である。 (Conventional brazing jig 150)
FIG. 15 is a schematic view showing an example of the configuration of a conventional brazing jig. FIG. 16 is a schematic view for explaining the arrangement of the conventional brazing jig with respect to the laminated refrigerant distributor. FIG. 17 is a schematic view showing an arrangement state of a conventional brazing jig during a brazing process.
　図１５に示すように、従来のろう付け用治具１５０は、第１治具１５１および第２治具１５２で構成されている。ろう付け用治具１５０は、図１６および図１７に示すように、第１治具１５１と第２治具１５２とで、複数の板状体１１で形成されたろう付け前の積層型冷媒分配器６０を挟み込むように使用される。そして、第１治具１５１、第２治具１５２および積層型冷媒分配器６０は、ろう付け処理の際に、加圧治具７０によって加圧されて固定される。 As shown in FIG. 15, the conventional brazing jig 150 is composed of a first jig 151 and a second jig 152. As shown in FIGS. 16 and 17, the brazing jig 150 is a laminated refrigerant distributor before brazing, which is formed of a plurality of plate-shaped bodies 11 by the first jig 151 and the second jig 152. It is used to sandwich 60. Then, the first jig 151, the second jig 152, and the laminated refrigerant distributor 60 are pressed and fixed by the pressurizing jig 70 during the brazing process.
　第１治具１５１は、例えばステンレス製であり、長尺状に形成されている。第１治具１５１は、長手方向（図１５のｘ方向）および短手方向（ｙ方向）それぞれの長さが積層型冷媒分配器６０の長手方向および短手方向それぞれの長さと略同等の長さとなるように形成されている。なお、従来の第１治具１５１は、本実施の形態１に係る第１治具５１と異なり、１枚の板状部材であるとともに、第１貫通孔５１ａが形成されていない。 The first jig 151 is made of stainless steel, for example, and is formed in a long shape. The length of the first jig 151 in the longitudinal direction (x direction in FIG. 15) and the length in the lateral direction (y direction) is substantially the same as the length in the longitudinal direction and the lateral direction of the laminated refrigerant distributor 60. It is formed so as to be. Unlike the first jig 51 according to the first embodiment, the conventional first jig 151 is a single plate-shaped member and does not have a first through hole 51a.
　積層型冷媒分配器６０のろう付け処理が行われる場合、第１治具１５１は、図１６に示すように、積層された複数の板状体１１の積層方向（ｚ方向）の端面のうち、伝熱管４が接続される冷媒出口側の端面に接するように配置される。 When the laminated refrigerant distributor 60 is brazed, the first jig 151 uses the end faces of the plurality of laminated plate-like bodies 11 in the stacking direction (z direction) as shown in FIG. The heat transfer tube 4 is arranged so as to be in contact with the end surface on the refrigerant outlet side to which the heat transfer tube 4 is connected.
　第２治具１５２は、例えばステンレス製であり、本実施の形態１に係る第２治具５２と同様に、長尺状に形成されている。積層型冷媒分配器６０のろう付け処理が行われる場合、第２治具１５２は、図１６に示すように、積層された複数の板状体１１の積層方向（ｚ方向）の端面のうち、円管が接続される冷媒入口側の端面に接するように配置される。また、第２治具１５２には、本実施の形態１に係る第２治具５２と同様に、第２貫通孔５２ａが形成されている。 The second jig 152 is made of stainless steel, for example, and is formed in a long shape like the second jig 52 according to the first embodiment. When the laminated refrigerant distributor 60 is brazed, the second jig 152 uses, as shown in FIG. 16, among the end faces of the plurality of laminated plate-like bodies 11 in the stacking direction (z direction). It is arranged so as to be in contact with the end face on the refrigerant inlet side to which the circular pipe is connected. Further, the second jig 152 is formed with a second through hole 52a as in the second jig 52 according to the first embodiment.
（従来のろう付け用治具１５０を用いた場合の板状体１１の熱膨張）
　図１８および図１９は、従来のろう付け用治具を用いた場合の、ろう付け処理時における板状体の熱膨張について説明するための模式断面図である。なお、図１８および図１９では、説明を容易とするため、ろう付け用治具１５０の第１治具１５１と、第１治具１５１に接する第１板状部材１２＿６～第２板状部材１３＿３までの一部の板状体１１とを図示する。また、図１８において、第１治具１５１とそれぞれの板状体１１とに示される矢印は、長手方向（ｘ方向）における熱膨張の状態を示し、矢印の長さは熱膨張量を示すものとする。さらに、図１９において、第１治具１５１と積層型冷媒分配器６０とに示される矢印は、長手方向（ｘ方向）における熱収縮の状態を示し、矢印の長さは熱収縮量を示すものとする。熱膨張および熱収縮は、板状体１１の短手方向（ｙ方向）においても発生するが、ここでは、説明を容易とするため、長手方向における熱膨張および熱収縮のみを図示して説明する。 (Thermal expansion of the plate-like body 11 when the conventional brazing jig 150 is used)
18 and 19 are schematic cross-sectional views for explaining the thermal expansion of the plate-like body during the brazing process when a conventional brazing jig is used. In addition, in FIGS. 18 and 19, in order to facilitate the explanation, the first jig 151 of the brazing jig 150 and the first plate-shaped member 12_6 to the second plate-shaped member 13_3 in contact with the first jig 151 A part of the plate-shaped body 11 up to is illustrated. Further, in FIG. 18, the arrows shown on the first jig 151 and the respective plate-shaped bodies 11 indicate the state of thermal expansion in the longitudinal direction (x direction), and the length of the arrow indicates the amount of thermal expansion. And. Further, in FIG. 19, the arrows shown by the first jig 151 and the laminated refrigerant distributor 60 indicate the state of heat shrinkage in the longitudinal direction (x direction), and the length of the arrow indicates the amount of heat shrinkage. And. Thermal expansion and contraction also occur in the lateral direction (y direction) of the plate-shaped body 11, but here, for ease of explanation, only thermal expansion and thermal contraction in the longitudinal direction will be illustrated and described. ..
　従来のろう付け用治具１５０が用いられる場合のろう付け処理では、積層型冷媒分配器６０を構成する板状体１１に対して熱が加わると、図１８に示すように、第１治具１５１およびそれぞれの板状体１１では、熱膨張が発生する。ここで、ステンレス製の第１治具１５１と、アルミニウムまたはアルミニウム合金製の板状体１１とでは、線膨張率が異なる。また、第１板状部材１２と第２板状部材１３との間には、第２板状部材１３の表面に塗布されたろう材が介在している。 In the brazing process when the conventional brazing jig 150 is used, when heat is applied to the plate-shaped body 11 constituting the laminated refrigerant distributor 60, as shown in FIG. 18, the first jig Thermal expansion occurs in 151 and each plate-shaped body 11. Here, the linear expansion coefficient is different between the first jig 151 made of stainless steel and the plate-shaped body 11 made of aluminum or an aluminum alloy. Further, a brazing material applied to the surface of the second plate-shaped member 13 is interposed between the first plate-shaped member 12 and the second plate-shaped member 13.
　このような場合に、ろう材が溶融すると、表裏に溶融したろう材が存在する１２＿４および１２＿５と、第２板状部材１３＿３～１３＿５とは、溶融したろう材によって制限あるいは規制されることなく熱膨張する。 In such a case, when the brazing material is melted, 12_4 and 12_5 in which the molten brazing material is present on the front and back surfaces and the second plate-shaped members 13_3 to 13_5 are heated without being restricted or restricted by the molten brazing material. Inflate.
　これに対して、第１治具１５１に接する第１板状部材１２＿６は、表面にろう材が介在していない。そのため、第１治具１５１の熱膨張の影響を受け、他の板状体１１である第１板状部材１２＿４および１２＿５ならびに第２板状部材１３＿３～１３＿５と比較して、熱膨張が制限あるいは規制される。 On the other hand, the first plate-shaped member 12_6 in contact with the first jig 151 does not have a brazing material interposed on the surface. Therefore, it is affected by the thermal expansion of the first jig 151, and the thermal expansion is limited or limited as compared with the first plate-shaped members 12_4 and 12_5 and the second plate-shaped members 13_3 to 13_5 which are other plate-shaped bodies 11. Be regulated.
　一方、ろう付け処理によってそれぞれの板状体１１がろう付けされた後、積層型冷媒分配器６０が放熱されると、ろう付けされた積層型冷媒分配器６０では、図１９に示すように、熱収縮が発生する。このとき、積層型冷媒分配器６０を構成するそれぞれの板状体１１は、あたかも一体型の積層型冷媒分配器６０として収縮する。そのため、第１治具１５１に接する第１板状部材１２＿６の熱収縮量は、熱膨張量よりも大きくなる。これにより、第１板状部材１２＿６に設けられた伝熱管挿入部２ｂの位置および寸法は、ろう付け前の状態と比較して変化する。 On the other hand, when the laminated refrigerant distributor 60 dissipates heat after the respective plate-shaped bodies 11 are brazed by the brazing process, the brazed laminated refrigerant distributor 60 is as shown in FIG. Heat shrinkage occurs. At this time, each plate-shaped body 11 constituting the laminated refrigerant distributor 60 contracts as if it were an integrated laminated refrigerant distributor 60. Therefore, the amount of heat shrinkage of the first plate-shaped member 12_6 in contact with the first jig 151 is larger than the amount of thermal expansion. As a result, the position and dimensions of the heat transfer tube insertion portion 2b provided on the first plate-shaped member 12_6 change as compared with the state before brazing.
　このように、従来のろう付け用治具１５０を用いて板状体１１のろう付け処理を行った場合には、ろう付け用治具１５０に接する板状体１１とそれ以外の板状体１１との熱膨張量が異なることにより、伝熱管挿入部２ｂの位置および寸法が変化する。 In this way, when the plate-shaped body 11 is brazed using the conventional brazing jig 150, the plate-shaped body 11 in contact with the brazing jig 150 and the other plate-shaped bodies 11 are in contact with each other. The position and dimensions of the heat transfer tube insertion portion 2b change due to the difference in the amount of thermal expansion with and from.
（本実施の形態１に係るろう付け用治具５０を用いた場合の板状体１１の熱膨張）
　図２０は、本実施の形態１に係るろう付け用治具を用いた場合の、ろう付け処理時における板状体１１の熱膨張について説明するための模式断面図である。なお、図２０では、説明を容易とするため、ろう付け用治具５０の第１治具５１と、第１治具５１に接する第１板状部材１２＿６～第２板状部材１３＿３までの一部の板状体１１とを図示する。また、図２０において、第１治具５１とそれぞれの板状体１１とに示される矢印は、長手方向（ｘ方向）における熱膨張の状態を示し、矢印の長さは熱膨張量を示すものとする。熱膨張および熱収縮は、板状体１１の短手方向（ｙ方向）においても発生するが、ここでは、説明を容易とするため、長手方向における熱膨張および熱収縮のみを図示して説明する。 (Thermal expansion of the plate-shaped body 11 when the brazing jig 50 according to the first embodiment is used)
FIG. 20 is a schematic cross-sectional view for explaining the thermal expansion of the plate-shaped body 11 during the brazing process when the brazing jig according to the first embodiment is used. In FIG. 20, for the sake of simplicity, the first jig 51 of the brazing jig 50 and one of the first plate-shaped members 12_6 to the second plate-shaped members 13_3 in contact with the first jig 51. The plate-shaped body 11 of the portion is illustrated. Further, in FIG. 20, the arrows shown on the first jig 51 and the respective plate-shaped bodies 11 indicate the state of thermal expansion in the longitudinal direction (x direction), and the length of the arrow indicates the amount of thermal expansion. And. Thermal expansion and contraction also occur in the lateral direction (y direction) of the plate-shaped body 11, but here, for ease of explanation, only thermal expansion and thermal contraction in the longitudinal direction will be illustrated and described. ..
　本実施の形態１に係るろう付け用治具５０が用いられる場合のろう付け処理では、積層型冷媒分配器６０を構成する板状体１１に対して熱が加わると、図２０に示すように、第１治具５１およびそれぞれの板状体１１では、熱膨張が発生する。このとき、ステンレス製の第１治具１５１と、アルミニウムまたはアルミニウム合金製の板状体１１とでは、線膨張率が異なる。 In the brazing process when the brazing jig 50 according to the first embodiment is used, when heat is applied to the plate-shaped body 11 constituting the laminated refrigerant distributor 60, as shown in FIG. , The first jig 51 and each of the plate-shaped bodies 11 generate thermal expansion. At this time, the linear expansion coefficient is different between the first jig 151 made of stainless steel and the plate-shaped body 11 made of aluminum or an aluminum alloy.
　一方、本実施の形態１に係るろう付け用治具５０では、第１治具５１が複数の分割第１治具５１Ａおよび５１Ｂに分割されている。そのため、分割第１治具５１Ａおよび５１Ｂは、接している第１板状部材１２＿６の熱膨張に追従する。これにより、分割第１治具５１Ａおよび５１Ｂに接する第１板状部材１２＿６は、第１治具５１の熱膨張の影響を受けることなく、他の板状体１１である第１板状部材１２＿４および１２＿５ならびに第２板状部材１３＿３～１３＿５と同様に熱膨張する。 On the other hand, in the brazing jig 50 according to the first embodiment, the first jig 51 is divided into a plurality of divided first jigs 51A and 51B. Therefore, the split first jigs 51A and 51B follow the thermal expansion of the first plate-shaped member 12_6 in contact with the first plate-shaped member 12_6. As a result, the first plate-shaped member 12_6 in contact with the divided first jigs 51A and 51B is not affected by the thermal expansion of the first jig 51, and the first plate-shaped member 12_4 which is another plate-shaped body 11 And 12_5 and the second plate-shaped members 13_3 to 13_5 are thermally expanded.
　熱収縮については、図示しないが、従来のろう付け用治具１５０を用いた場合と同様に、積層型冷媒分配器６０が放熱されると、積層型冷媒分配器６０を構成するそれぞれの板状体１１は、あたかも一体型の積層型冷媒分配器６０として収縮する。そのため、分割第１治具５１Ａおよび５１Ｂに接する第１板状部材１２＿６は、他の板状体１１である第１板状部材１２＿４および１２＿５ならびに第２板状部材１３＿３～１３＿５と同様に熱収縮する。 Although not shown, heat shrinkage is not shown, but as in the case of using the conventional brazing jig 150, when the laminated refrigerant distributor 60 dissipates heat, each plate shape constituting the laminated refrigerant distributor 60 is formed. The body 11 contracts as if it were an integrated laminated refrigerant distributor 60. Therefore, the first plate-shaped member 12_6 in contact with the divided first jigs 51A and 51B is heat-shrinked in the same manner as the first plate-shaped members 12_4 and 12_5 and the second plate-shaped members 13_3 to 13_5, which are other plate-shaped bodies 11. To do.
　したがって、この場合には、それぞれの板状体１１における熱膨張量と熱収縮量とに差異がないため、伝熱管挿入部２ｂの位置および寸法の変化が抑制される。 Therefore, in this case, since there is no difference in the amount of thermal expansion and the amount of heat contraction in each plate-shaped body 11, changes in the position and dimensions of the heat transfer tube insertion portion 2b are suppressed.
　以上のように、本実施の形態１に係るろう付け用治具５０は、積層型冷媒分配器６０における板状体１１の積層方向の一方の端面に接して設けられ、長尺状の板状体１１の長手方向において複数に分割された第１治具５１と、板状体１１の積層方向の他方の端面に接して設けられる第２治具５２とを備えている。これにより、積層型冷媒分配器６０に対するろう付け処理の際に、第１治具５１が、第１治具５１と接する板状体１１の熱膨張に追従するので、第１治具５１に接する板状体１１は、第１治具５１の熱膨張の影響を受けることなく熱膨張する。したがって、ろう付け処理の際の板状体の１１の熱膨張量と熱収縮量とに差異がないので、伝熱管挿入部２ｂの位置および寸法の変化を抑制することができる。 As described above, the brazing jig 50 according to the first embodiment is provided in contact with one end face of the plate-like body 11 in the stacking direction in the laminated refrigerant distributor 60, and has a long plate shape. A first jig 51 divided into a plurality of pieces in the longitudinal direction of the body 11 and a second jig 52 provided in contact with the other end surface of the plate-shaped body 11 in the stacking direction are provided. As a result, during the brazing process on the laminated refrigerant distributor 60, the first jig 51 follows the thermal expansion of the plate-shaped body 11 in contact with the first jig 51, and thus comes into contact with the first jig 51. The plate-shaped body 11 thermally expands without being affected by the thermal expansion of the first jig 51. Therefore, since there is no difference between the amount of thermal expansion and the amount of heat shrinkage of the plate-shaped body 11 during the brazing process, changes in the position and dimensions of the heat transfer tube insertion portion 2b can be suppressed.
　ろう付け用治具５０において、第１治具５１は、板状体１１の積層方向に貫通する第１貫通孔５１ａを有している。この場合、第１貫通孔５１ａは、板状体１１に形成された伝熱管挿入部２ｂに対応する位置に設けられると好ましい。これにより、第１治具５１と板状体１１との接触面積が減少するため、ろう付け処理の際に生じる板状体１１の熱膨張に対する第１治具５１の熱膨張の影響を低減することができ、伝熱管挿入部２ｂの位置および寸法の変化をさらに抑制することができる。 In the brazing jig 50, the first jig 51 has a first through hole 51a penetrating in the stacking direction of the plate-shaped body 11. In this case, it is preferable that the first through hole 51a is provided at a position corresponding to the heat transfer tube insertion portion 2b formed in the plate-shaped body 11. As a result, the contact area between the first jig 51 and the plate-shaped body 11 is reduced, so that the influence of the thermal expansion of the first jig 51 on the thermal expansion of the plate-shaped body 11 that occurs during the brazing process is reduced. This makes it possible to further suppress changes in the position and dimensions of the heat transfer tube insertion portion 2b.
　ろう付け用治具５０において、第２治具５２は、板状体１１に取り付けられた配管を避ける第２貫通孔５２ａを有している。これにより、配管の有無によらず、ろう付け処理の際に、第２治具５２を積層型冷媒分配器６０に取り付けることができる。 In the brazing jig 50, the second jig 52 has a second through hole 52a that avoids the piping attached to the plate-shaped body 11. As a result, the second jig 52 can be attached to the laminated refrigerant distributor 60 during the brazing process regardless of the presence or absence of piping.
　また、本実施の形態１に係る積層型冷媒分配器６０は、本実施の形態１に係るろう付け用治具５０を用いて作製されたものであり、板状体１１の積層方向の端面に加熱痕８０が形成されている。このような加熱痕８０は、積層型冷媒分配器６０に対するろう付け処理の際に、板状体１１の表面に取り付けられるろう付け用治具に接触する部分と接触しない部分とで、酸化の仕方が異なることで生じる。そのため、加熱痕８０の状態により、積層型冷媒分配器６０を作製した際のろう付け用治具の形状を判断することができる。 Further, the laminated refrigerant distributor 60 according to the first embodiment is manufactured by using the brazing jig 50 according to the first embodiment, and is formed on the end face of the plate-shaped body 11 in the laminated direction. A heating mark 80 is formed. Such a heating mark 80 is a method of oxidation at a portion that contacts the brazing jig attached to the surface of the plate-shaped body 11 and a portion that does not contact during the brazing treatment of the laminated refrigerant distributor 60. Is caused by different. Therefore, the shape of the brazing jig when the laminated refrigerant distributor 60 is manufactured can be determined from the state of the heating marks 80.
　１　熱交換器、２　第１分配器、２ａ　分配流路、２ｂ　伝熱管挿入部、３　第２分配器、３ａ　合流流路、４　伝熱管、５　フィン、１１　板状体、１２、１２＿１、１２＿２、１２＿３、１２＿４、１２＿５、１２＿６　第１板状部材、１２ａ＿１、１２ａ＿２、１２ａ＿３、１２ａ＿４　貫通孔、１３、１３＿１、１３＿２、１３＿３、１３＿４、１３＿５　第２板状部材、１３ａ＿１、１３ａ＿２、１３ａ＿３　貫通孔、５０　ろう付け用治具、５１　第１治具、５１Ａ、５１Ｂ　分割第１治具、５１ａ　第１貫通孔、５２　第２治具、５２ａ　第２貫通孔、６０　積層型冷媒分配器、７０　加圧治具、７１　把持部、８０　加熱痕、１１２Ａ　Ｚ字状部、１１２Ｂ　直線状部、１５０　ろう付け用治具、１５１　第１治具、１５２　第２治具。 1 heat exchanger, 2 1st distributor, 2a distribution flow path, 2b heat transfer tube insertion part, 3 2nd distributor, 3a confluence flow path, 4 heat transfer tube, 5 fins, 11 plate-like body, 12, 12_1, 12_2 , 12_3, 12_4, 12_5, 12_6 1st plate-shaped member, 12a_1, 12a_2, 12a_3, 12a_4 through hole, 13, 13_1, 13_2, 13_3, 13_4, 13_5 2nd plate-shaped member, 13a_1, 13a_2, 13a_3 through hole, 50 Brazing jig, 51 1st jig, 51A, 51B Divided 1st jig, 51a 1st through hole, 52 2nd jig, 52a 2nd through hole, 60 Laminated refrigerant distributor, 70 Pressurized cure Tool, 71 grip, 80 heating marks, 112A Z-shaped part, 112B linear part, 150 brazing jig, 151 first jig, 152 second jig.

Claims (7)

  1. 　長尺状の複数の板状体が積層された積層型冷媒分配器のろう付けを行う際に用いられるろう付け用治具であって、
    　前記板状体の積層方向の一方の端面に接して設けられ、前記板状体の長手方向において複数に分割された第１治具と、
    　前記板状体の積層方向の他方の端面に接して設けられる第２治具と
    を備えるろう付け用治具。     A brazing jig used when brazing a laminated refrigerant distributor in which a plurality of long plate-shaped bodies are laminated.
    A first jig provided in contact with one end face in the stacking direction of the plate-shaped body and divided into a plurality of pieces in the longitudinal direction of the plate-shaped body.
    A brazing jig including a second jig provided in contact with the other end face in the stacking direction of the plate-shaped bodies.
  2. 　前記第１治具は、
    　前記板状体の積層方向に貫通する第１貫通孔を有する
    請求項１に記載のろう付け用治具。     The first jig is
    The brazing jig according to claim 1, which has a first through hole penetrating in the stacking direction of the plate-shaped bodies.
  3. 　前記第１貫通孔は、
    　前記板状体の積層方向の前記一方の端面に形成された、伝熱管を挿入するための挿入孔に対応する位置に設けられる
    請求項２に記載のろう付け用治具。     The first through hole is
    The brazing jig according to claim 2, which is provided at a position corresponding to an insertion hole for inserting a heat transfer tube, which is formed on one end surface of the plate-shaped body in the stacking direction.
  4. 　前記第２治具は、
    　前記板状体の積層方向の前記他方の端面に取り付けられた配管を避ける第２貫通孔を有する
    請求項１～３のいずれか一項に記載のろう付け用治具。     The second jig is
    The brazing jig according to any one of claims 1 to 3, which has a second through hole for avoiding a pipe attached to the other end surface in the stacking direction of the plate-shaped body.
  5. 　前記第１治具および前記第２治具は、
    　前記板状体と異なる材料で形成されている
    請求項１～４のいずれか一項に記載のろう付け用治具。     The first jig and the second jig
    The brazing jig according to any one of claims 1 to 4, which is made of a material different from the plate-like body.
  6. 　前記第１治具および前記第２治具は、
    　前記板状体よりも小さい熱膨張係数を有する
    請求項５に記載のろう付け用治具。     The first jig and the second jig
    The brazing jig according to claim 5, which has a coefficient of thermal expansion smaller than that of the plate-shaped body.
  7. 　請求項１～６に記載のろう付け用治具を用いて作製された積層型冷媒分配器であって、
    　前記板状体の積層方向の端面に加熱痕が形成されている
    積層型冷媒分配器。     A laminated refrigerant distributor manufactured by using the brazing jig according to claims 1 to 6.
    A laminated refrigerant distributor in which heating marks are formed on the end faces of the plate-shaped bodies in the laminated direction.
PCT/JP2019/027721 2019-07-12 2019-07-12 Brazing jig and multilayer refrigerant distributor produced using same WO2021009806A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11629897B2 (en) * 2017-04-14 2023-04-18 Mitsubishi Electric Corporation Distributor, heat exchanger, and refrigeration cycle apparatus

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JPS5547800U (en) * 1978-09-25 1980-03-28
JPS58118738U (en) * 1982-02-05 1983-08-13 富士電機株式会社 Semiconductor piece brazing jig
JP2002346742A (en) * 2001-05-24 2002-12-04 Denso Corp Brazing method
WO2018029761A1 (en) * 2016-08-08 2018-02-15 三菱電機株式会社 Laminated header and method for manufacturing laminated header
WO2018116413A1 (en) * 2016-12-21 2018-06-28 三菱電機株式会社 Distributor, heat exchanger, and refrigeration cycle device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5547800U (en) * 1978-09-25 1980-03-28
JPS58118738U (en) * 1982-02-05 1983-08-13 富士電機株式会社 Semiconductor piece brazing jig
JP2002346742A (en) * 2001-05-24 2002-12-04 Denso Corp Brazing method
WO2018029761A1 (en) * 2016-08-08 2018-02-15 三菱電機株式会社 Laminated header and method for manufacturing laminated header
WO2018116413A1 (en) * 2016-12-21 2018-06-28 三菱電機株式会社 Distributor, heat exchanger, and refrigeration cycle device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11629897B2 (en) * 2017-04-14 2023-04-18 Mitsubishi Electric Corporation Distributor, heat exchanger, and refrigeration cycle apparatus

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