WO2017038857A1 - Heat exchanger and method for producing heat exchanger - Google Patents

Heat exchanger and method for producing heat exchanger Download PDF

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Publication number
WO2017038857A1
WO2017038857A1 PCT/JP2016/075428 JP2016075428W WO2017038857A1 WO 2017038857 A1 WO2017038857 A1 WO 2017038857A1 JP 2016075428 W JP2016075428 W JP 2016075428W WO 2017038857 A1 WO2017038857 A1 WO 2017038857A1
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WO
WIPO (PCT)
Prior art keywords
fins
heat exchanger
fin
insertion port
portions
Prior art date
Application number
PCT/JP2016/075428
Other languages
French (fr)
Japanese (ja)
Inventor
中野　寛之
泰弘 笹井
透 安東
Original Assignee
ダイキン工業株式会社
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Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Publication of WO2017038857A1 publication Critical patent/WO2017038857A1/en

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    • 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
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements

Definitions

  • the present invention relates to a heat exchanger and a method for manufacturing the heat exchanger.
  • a heat exchanger in which a first header collecting pipe, a second header collecting pipe, a flat tube, and fins are joined to each other by brazing (see Japanese Patent Application Laid-Open No. 2015-31491).
  • the flat tube When the flat tube is press-fitted into the fin, the flat tube may be difficult to insert into the fin due to the frictional force between the flat tube and the fin. In this case, if the flat tube is forcibly pressed into the fin, the flat tube and the fin may be damaged.
  • An object of the present invention is to provide a heat exchanger and a heat exchanger manufacturing method that improve the ease of attaching a flat tube and a fin.
  • the heat exchanger includes a plurality of laminated fins and a plurality of flat tubes.
  • the plurality of flat tubes are arranged side by side in a crossing direction that intersects the stacking direction of the plurality of fins.
  • Each of the plurality of fins has a plurality of insertion port edges joined to each of the plurality of flat tubes.
  • At least one fin among the plurality of fins has at least one convex portion. At least one convex part protrudes in the lamination direction, and is deformed when the plurality of flat tubes are joined to the plurality of insertion port edges.
  • At least one fin has a convex portion that protrudes in the stacking direction and deforms when the plurality of flat tubes are joined to the plurality of insertion port edges.
  • the convex portion is deformed, so that at least one insertion port edge is expanded.
  • the frictional force between the insertion edge and the flat tube is reduced. Since the frictional force is reduced, the ease of attaching the flat tube and the fin can be improved. As a result, it can be expected that damage to the flat tube and the fins is suppressed.
  • the at least one fin protrudes from the at least one insertion port edge at a position separated in the orthogonal direction perpendicular to the plane including the stacking direction and the intersecting direction.
  • At least one fin has at least one convex portion at the above-described position, it is possible to effectively widen at least one insertion port edge.
  • At least one fin has a plurality of convex portions.
  • the plurality of convex portions are formed at positions separated from each of the plurality of insertion opening edge portions in the orthogonal direction.
  • the heat exchanger according to the third aspect of the present invention since at least one fin has a plurality of convex portions at the above-described positions, that is, the number of convex portions corresponding to the number of insertion port edges, all the insertion ports of the fins The part can be effectively expanded. Therefore, in all the fins having a plurality of convex portions, the ease of attaching the flat tube and the fins can be improved.
  • each of the plurality of fins has a plurality of convex portions.
  • the plurality of convex portions in each of the plurality of fins are formed at positions separated from each of the plurality of insertion port edge portions in the orthogonal direction.
  • At least one fin has a convex portion between at least one insertion port edge and an insertion port edge adjacent to the at least one insertion port edge.
  • At least one fin has at least one convex portion at the above-described position, at least two insertion port edge portions opposed to each other with the convex portion interposed therebetween are effectively provided. Can be spread.
  • At least one fin has a plurality of convex portions.
  • the plurality of convex portions are formed on each of the plurality of insertion opening edge portions between two adjacent insertion opening edge portions.
  • At least one fin has a plurality of convex portions, that is, a number of convex portions which is one less than the total number of the insertion port edge portions at the above-described position.
  • the convex part is formed adjacent to all the insertion opening edge parts, all the insertion opening edge parts of the said fin can be expanded effectively. Therefore, in all the fins having a plurality of convex portions, the ease of attaching the flat tube and the fins can be improved.
  • each of the plurality of fins has a plurality of convex portions.
  • the plurality of convex portions in each of the plurality of fins are formed on each of the plurality of insertion opening edge portions between two adjacent insertion opening edge portions.
  • all the fins have a plurality of convex portions at the above-described positions, that is, the number of convex portions that is one less than the total number of the insertion port edge portions.
  • the convex portions are formed adjacent to all the insertion opening edges, it is possible to effectively widen all the insertion opening edges of all the fins. Therefore, in all the fins, the ease of attaching the flat tube and the fins can be improved.
  • the method for manufacturing a heat exchanger includes a first step and a second step.
  • a plurality of fins are stacked.
  • Each of the plurality of fins has a plurality of insertion edge portions, and at least one fin has at least one convex portion.
  • the plurality of flat tubes are joined to the insertion edge of the fin.
  • the plurality of flat tubes are arranged side by side in an intersecting direction that intersects the stacking direction of the plurality of fins.
  • the convex portion of the fin protrudes in the stacking direction, and the fin is deformed when the flat tube is joined to the insertion opening edge of the fin.
  • the heat exchanger manufacturing method in the second step, at least one fin protrudes in the stacking direction, and the convex portion of the fin is deformed when the flat tube is joined to the insertion port edge.
  • the flat tube in the second step, is press-fitted into the fin insertion port, so that the flat tube is joined to the fin insertion port edge. And when a flat tube joins to the insertion port edge part of a fin, the convex part of a fin is expanded.
  • the ease of attaching the flat tube and the fins can be improved by reducing the frictional force between the insertion port edge and the flat tube. As a result, it can be expected that damage to the flat tube and the fins is suppressed.
  • At least one fin has a convex portion that is separated from at least one insertion port edge in the orthogonal direction, so that at least one insertion port edge is effectively widened. Can do.
  • the heat exchanger according to the third aspect of the present invention since at least one fin has a plurality of convex portions separated from each of the plurality of insertion port edges in the orthogonal direction, all the insertion ports of at least one fin The part can be effectively expanded. Therefore, in all the fins having a plurality of convex portions, the ease of attaching the flat tube and the fins can be improved.
  • all the fins have a plurality of convex portions separated from each of the plurality of insertion port edges in the orthogonal direction, all the insertion port edges of all the fins are provided. Can be spread effectively. Therefore, in all the fins, the ease of attaching the flat tube and the fins can be improved.
  • At least one fin has a convex portion between at least one insertion port edge and an insertion port edge adjacent to the at least one insertion port edge. At least the two insertion opening edge portions that face each other with the convex portion interposed therebetween can be effectively widened.
  • the convex portions are formed adjacent to all the insertion port edges, all the insertion port edges of the fins are effective. Can be expanded. Therefore, in all the fins having a plurality of convex portions, the ease of attaching the flat tube and the fins can be improved.
  • the convex portions are formed adjacent to all the insertion port edge portions in all the fins, all the insertion port edge portions of all the fins are effective. Can be spread. Therefore, in all the fins, the ease of attaching the flat tube and the fins can be improved.
  • the ease of attaching the flat tube and the fin is improved by reducing the frictional force between the insertion port edge and the flat tube. Can do. As a result, it can be expected that damage to the flat tube and the fins is suppressed.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is sectional drawing of the fin before a some flat tube is press-fitted in a some notch part. It is a figure explaining a 1st convex part. It is a figure explaining a 2nd convex part.
  • FIG. 1 shows a configuration of an air conditioner 100 including an outdoor heat exchanger 400 as an example of a heat exchanger according to an embodiment of the present invention. It is a figure explaining.
  • the air conditioner 100 includes an air conditioning outdoor unit 200 as a heat source side unit and an air conditioning indoor unit 300 as a use side unit.
  • the air-conditioning outdoor unit 200 and the air-conditioning indoor unit 300 are connected to each other via a liquid refrigerant refrigerant communication pipe 101 and a gas refrigerant refrigerant communication pipe 102.
  • the refrigerant circuit of the air conditioner 100 includes an air conditioning outdoor unit 200, an air conditioning indoor unit 300, a refrigerant communication pipe 101, and a refrigerant communication pipe 102. More specifically, the refrigerant circuit includes an expansion valve 203, a compressor 204, a four-way switching valve 205, an accumulator 206, an indoor heat exchanger 301, and an outdoor heat exchanger 400.
  • the air conditioning indoor unit 300 includes an indoor heat exchanger 301 and an indoor fan 302.
  • the indoor heat exchanger 301 is, for example, a cross fin type fin-and-tube heat exchanger configured by heat transfer tubes and a large number of fins.
  • the indoor heat exchanger 301 functions as a refrigerant evaporator during cooling operation to cool indoor air, and functions as a refrigerant condenser during heating operation to heat indoor air.
  • the air conditioning outdoor unit 200 includes a gas refrigerant pipe 201, a liquid refrigerant pipe 202, an expansion valve 203, a compressor 204, a four-way switching valve 205, an accumulator 206, an outdoor unit.
  • the fan 207 and the outdoor heat exchanger 400 are included.
  • One end of the gas refrigerant pipe 201 is connected to the gas side end of the outdoor heat exchanger 400, and the other end of the gas refrigerant pipe 201 is connected to the four-way switching valve 205.
  • One end of the liquid refrigerant pipe 202 is connected to the liquid side end of the outdoor heat exchanger 400, and the other end of the liquid refrigerant pipe 202 is connected to the expansion valve 203.
  • the expansion valve 203 is a mechanism that depressurizes the refrigerant.
  • the expansion valve 203 is provided between the outdoor heat exchanger 400 and the refrigerant communication pipe 101.
  • the compressor 204 is a hermetic compressor driven by a compressor motor.
  • the four-way switching valve 205 is a mechanism that switches the direction in which the refrigerant flows.
  • the four-way switching valve 205 connects the refrigerant pipe 201 on the discharge side of the compressor 204 and the gas refrigerant pipe 201 and passes through the accumulator 206.
  • the refrigerant pipe on the suction side of the compressor 204 and the refrigerant communication pipe 102 are connected.
  • the four-way switching valve 205 connects the refrigerant pipe on the discharge side of the compressor 204 and the refrigerant communication pipe 102 and also accumulator 206. Then, the refrigerant pipe on the suction side of the compressor 204 and the gas refrigerant pipe 201 are connected.
  • the accumulator 206 is provided between the compressor 204 and the four-way switching valve 205.
  • the accumulator 206 divides the refrigerant into a gas phase and a liquid phase.
  • the outdoor fan 207 supplies outdoor air to the outdoor heat exchanger 400.
  • the opening degree of the expansion valve 203 is determined by the refrigerant overheating at the outlet of the indoor heat exchanger 301 (that is, the gas side of the indoor heat exchanger 301). The degree is adjusted to be constant.
  • the connection state of the four-way switching valve 205 during the cooling operation is as already described.
  • the refrigerant discharged from the compressor 204 flows into the outdoor heat exchanger 400 through the four-way switching valve 205, dissipates heat to the outdoor air, and condenses.
  • the refrigerant that has flowed out of the outdoor heat exchanger 400 expands when it passes through the expansion valve 203. Then, it flows into the indoor heat exchanger 301, absorbs heat from the indoor air, and evaporates.
  • the opening degree of the expansion valve 203 is adjusted so that the degree of supercooling of the refrigerant at the outlet of the indoor heat exchanger 301 becomes constant at the target value of the degree of supercooling.
  • the connection state of the four-way switching valve 205 during the heating operation is as already described.
  • the refrigerant discharged from the compressor 204 flows into the indoor heat exchanger 301 through the four-way switching valve 205, dissipates heat to the indoor air, and condenses.
  • the refrigerant that has flowed out of the indoor heat exchanger 301 expands when it passes through the expansion valve 203. Then, it flows into the outdoor heat exchanger 400, absorbs heat from the outdoor air, and evaporates.
  • the refrigerant flowing out of the outdoor heat exchanger 400 passes through the four-way switching valve 205 and is again sucked into the compressor 204 and compressed.
  • FIG. 2 is an external perspective view of the outdoor heat exchanger 400.
  • the outdoor heat exchanger 400 includes a heat exchange unit 410, an entrance / exit header collecting pipe 420, and a folded header collecting pipe 430.
  • the heat exchanging section 410, the inlet / outlet header collecting pipe 420, and the folded header collecting pipe 430 are joined to each other by soldering.
  • a stacking direction in which a plurality of fins 411 described later are stacked is defined as an X-axis direction.
  • the longitudinal direction of each fin 411 that is, the direction in which a plurality of flat tubes 412 described later are arranged side by side is defined as the Y-axis direction.
  • a short direction of each fin 411, that is, an orthogonal direction orthogonal to a plane including the X-axis direction and the Y-axis direction is defined as a Z-axis direction.
  • the heat exchanging unit 410 exchanges heat between the outdoor air and the refrigerant.
  • the heat exchanging unit 410 includes a plurality of fins 411 and a plurality of flat tubes 412.
  • the plurality of fins 411 and the plurality of flat tubes 412 are made of aluminum or aluminum alloy.
  • the plurality of fins 411 are stacked in the X-axis direction.
  • the plurality of flat tubes 412 are arranged side by side in the Y-axis direction.
  • the entrance / exit header collecting pipe 420 is provided on one end side in the X-axis direction of the heat exchanging section 410.
  • the entrance / exit header collecting pipe 420 fixes the vicinity of one end of the flat pipe 412 in the X-axis direction.
  • the internal space of the inlet / outlet header collecting pipe 420 communicates with the internal flow path of the flat pipe 412.
  • the folded header collecting pipe 430 is provided on the other end side in the X-axis direction of the heat exchange unit 410.
  • the folded header collecting pipe 430 fixes the vicinity of the other end in the X-axis direction of the flat tube 412 (that is, the vicinity of the end opposite to the inlet / outlet header collecting pipe 420 side).
  • the internal space of the folded header collecting pipe 430 communicates with the internal flow path of the flat pipe 412.
  • FIG. 3 is a diagram for explaining the heat exchanger 410.
  • FIG. 3 is an enlarged view of a part of the YZ cross section in the region A of FIG.
  • the structure of the plurality of fins 411 is common to each other. Therefore, here, the structure of the fin 411 will be described as an example.
  • the fin 411 is a plate-like member.
  • the shape of the fin 411 is substantially rectangular as a whole. More specifically, the rectangle has a long side in the Y-axis direction and a short side in the Z-axis direction.
  • the fin 411 has a plurality of notches 421 as an example of an insertion port.
  • the plurality of notches 421 are formed on the windward side of the air flow (that is, the minus side in the Z-axis direction).
  • the plurality of notches 421 are formed at intervals in the Y-axis direction.
  • Each of the plurality of flat tubes 412 is inserted into the plurality of notches 421.
  • the notch edge part 422 as an example of the insertion port edge part of the some notch part 421 is joined with each of the some flat tube 412.
  • FIG. In the present embodiment, the cutout edge 422 is formed in a U shape.
  • the plurality of flat tubes 412 function as heat transfer tubes.
  • the refrigerant flows inside each flat tube 412, and each flat tube 412 transmits heat moving between the fins 411 and outdoor air to the refrigerant.
  • FIG. 4 is a diagram illustrating the fins 411 before and after the flat tube 412 is press-fitted.
  • 4A is a cross-sectional view taken along the line IV-IV in FIG.
  • FIG. 4B is a cross-sectional view of the fin 411 before the plurality of flat tubes 412 are press-fitted into the plurality of notches 421.
  • 4B corresponds to FIG. 4A and is a cross-sectional view of a portion corresponding to the IV-IV cross section of FIG.
  • FIG. 5 is a diagram illustrating a first convex portion 441 described later. Specifically, it is a VV sectional view of FIG.
  • FIG. 6 is a diagram illustrating a second convex portion 442 described later. Specifically, it is a VI-VI cross-sectional view of FIG.
  • the fin 411 has a convex portion 440.
  • the convex portion 440 includes a first convex portion 441 and a second convex portion 442.
  • the 1st convex part 441 is provided corresponding to the notch part 421. More specifically, the first convex portion 441 is provided at a position away from the notch edge portion 422 in the Z-axis direction. In the present embodiment, the first convex portion 441 is provided corresponding to all the cutout portions 421. That is, the 1st convex part 441 is provided in the position away from each of all the notch edge parts 422 in the Z-axis direction.
  • the first convex portion 441 is a convex portion protruding in the X-axis direction. More specifically, as shown in FIG. 5, the notch edge 422 rises from near one end in the Y-axis direction to the center part of the notch part 421, and near the other end of the notch edge part 422 in the Y-axis direction. It goes up and down.
  • the second convex portion 442 is provided in a region 450 between two notched edge portions 422 adjacent in the Y-axis direction.
  • the 2nd convex part 442 is provided in the area
  • the second convex portion 442 is a convex portion protruding in the X-axis direction. More specifically, as shown in FIG. 6, one notch edge 422 rises from the vicinity of the other notch edge 422 side to the center portion of the region 450, and from the center portion to the other notch In the edge part 422, it swells up near the edge part of the one notch edge part 422 side.
  • the bottom part of the second convex part 442 is wider than the bottom part of the first convex part 441.
  • the first protrusion 441 and the second protrusion 442 are deformed. More specifically, since the plurality of flat tubes 412 are press-fitted into the plurality of notches 421 from the X-axis direction, the first convex portion 441 is pushed and expanded in the Y-axis direction.
  • the outdoor heat exchanger 400 includes the heat exchange unit 410, the inlet / outlet header collecting pipe 420, and the folded header collecting pipe 430, and these heat exchanges.
  • the section 410, the entrance / exit header collecting pipe 420, and the folded header collecting pipe 430 are brazed to each other.
  • a plurality of fins 411 are stacked.
  • the plurality of flat tubes 412 arranged in the Y-axis direction intersecting the stacking direction (X-axis direction) of the plurality of fins 411 are arranged in the plurality of notches 421 of the plurality of fins 411 in the X-axis direction. It is press-fitted from.
  • the first convex portion 441 and the second convex portion 442 are deformed, and the first convex portion 441 is expanded in the Y-axis direction.
  • the notched edge portions 422 of the plurality of fins 411 are joined to the flat tube 412.
  • the plurality of fins 411 and the plurality of flat tubes 412 are temporarily fixed in a state where each of the plurality of flat tubes 412 is fitted into the plurality of notches 421.
  • the plurality of temporarily fixed fins 411 and the plurality of flat tubes 412 are brazed in the next step.
  • the outdoor heat exchanger 400 of this embodiment includes a plurality of fins 411 and a plurality of flat tubes 412.
  • Each of the plurality of fins 411 has a plurality of notched edges 422 joined to each of the plurality of flat tubes 412.
  • Each of the plurality of fins 411 has the first convex portion 441 by the number of the cutout edge portions 422. More specifically, the first convex portion 441 is provided at a position away from each of the plurality of cutout edge portions 422 in the Z-axis direction. The first convex portion 441 is deformed when the plurality of flat tubes 412 are press-fitted into the plurality of cutout edge portions 422, that is, is pushed and expanded in the Y-axis direction.
  • all the notch edges 422 are expanded. That is, the width in the Y-axis direction of all the notches 421 is increased.
  • the frictional force between the notched edges 422 and the flat tube 412 is reduced. Since the frictional force is reduced, the ease of attaching the flat tube 412 and the fin 411 can be improved. As a result, it can be expected that damage to the flat tubes 412 and the fins 411 is suppressed.
  • each of the plurality of fins 411 has the number of second convex portions 442 that is one less than the total number of notched edge portions 422. More specifically, each of the plurality of cutout edge portions 422 has a second convex portion 442 between two adjacent cutout edge portions 422.
  • the second convex portion 442 is deformed when the plurality of flat tubes 412 are press-fitted into the plurality of cut-out edge portions 422, that is, is pushed and expanded in the Y-axis direction. Thereby, all the notch edges 422 are expanded.
  • the notch edges 422 are expanded, so that the frictional force between the notch edges 422 and the flat tube 412 is reduced. Therefore, as described above, the ease of attaching the flat tubes 412 and the fins 411 can be improved, and as a result, it can be expected that the flat tubes 412 and the fins 411 are prevented from being damaged.
  • the fins 411 since all the fins 411 have the number of the second convex portions 442 that is one less than the total number of the notched edge portions 422, all the notched edges of all the fins 411 are included.
  • the part 422 can be effectively expanded. Therefore, in all the fins 411, the ease of attaching the flat tubes 412 and the fins 411 can be improved.
  • each of all the fins 411 has the same number of first convex portions 441 as the number of notched edge portions 422, but some of the fins 411 have a smaller number than the number of notched edge portions 422. It may have the 1st convex part 441, and does not need to have the 1st convex part 441 at all. That is, at least one fin 411 may have the same number of first convex portions 441 as the number of notched edge portions 422. In this case, in all the fins 411 having the first convex portions 441, all the notched edge portions 422 of the fins can be effectively expanded.
  • the fin having the first convex portions 441 smaller in number than the number of the notched edge portions 422 at least the notched edge portions 422 provided with the first convex portions 441 can be effectively expanded. As described above, the ease of attaching the flat tube 412 and the fins 411 can be improved.
  • the fins 411 having the same number of first convex portions 441 as the number of the notched edge portions 422 may not be present. That is, at least one fin 411 may have at least one first convex portion 441. In this case, at least one notch edge 422 of at least one fin 411 can be effectively expanded.
  • each of all the fins 411 has the number of the second convex portions 442 that is one less than the number of the notched edge portions 422, but some of the fins 411 have more than the number of the notched edge portions 422.
  • the number of the second convex portions 442 may be smaller by two or more, or the second convex portions 442 may not be included at all. That is, at least one fin 411 may have the number of second convex portions 442 that is one less than the number of notched edge portions 422. In this case, in all the fins 411 having the second protrusions 442, the ease of attaching the flat tubes 412 and the fins 411 can be improved.
  • the fin having the second convex portions 442 that is two or more smaller than the number of the notched edge portions 422 at least the two notched edge portions 422 facing each other across the second convex portions 442 can be effectively expanded. it can. As described above, the ease of attaching the flat tube 412 and the fins 411 can be improved.
  • the fins 411 having the same number of the second convex portions 442 as the number of one less than the number of the notched edge portions 422 may not be present. That is, at least one fin 411 may have at least one second convex portion 442. In this case, it is possible to effectively widen the two notched edge portions 422 of the at least one fin 411 facing each other with at least the second convex portion 442 interposed therebetween.
  • the plurality of flat tubes 412 are press-fitted into the plurality of notches 421, but may not be press-fitted.
  • the width of the plurality of cutout portions 421 in the Y-axis direction may be sufficiently larger than the width of the plurality of flat tubes 412 in the Y-axis direction. .
  • the plurality of flat tubes 412 are inserted into the plurality of cutout portions 421, they may be compressed in the Y-axis direction.
  • the first convex portion 441 is substantially flat. By compressing in the Y-axis direction, the first convex portion 441 rises in the X-axis direction. As a result, the above-described first convex portion 441 that is loose (that is, in a state of being spread) is formed.
  • the second convex portion 442 is also substantially flat. By being compressed in the Y-axis direction, the second convex portion 442 rises in the X-axis direction. Thereby, the above-described gentle second convex portion 442 is formed.
  • the first convex portion 441 and the second convex portion The shape of the part 442 is substantially the same.
  • the notch portion 421 is taken as an example of the insertion portion, but is not limited thereto.
  • An opening that matches the shape of the flat tube 412 may be formed as the insertion portion.
  • an opening edge is formed as the insertion opening edge.
  • the first convex portion 441 projecting in the X-axis direction has a corner at the tip as shown in FIG. 4A
  • the second convex portion 442 projecting in the X-axis direction is shown in FIG.
  • Each convex part may include a corner with an edge, may have a smooth curved shape, or may have a sharp edge.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
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  • General Engineering & Computer Science (AREA)
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  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

An outdoor heat exchanger (400), which improves the degree of ease of attaching flat tubes and fins, is provided with: a plurality of stacked fins (411); and a plurality of flat tubes (412) arranged side by side in the Z-axis direction. Each of the plurality of fins (411) is provided with a plurality of notched edge portions (422) which are joined to each of the plurality of flat tubes (412). At least one of the fins (411) is provided with at least one protrusion (440). The at least one protrusion (440) protrudes in the X-axis direction, and deforms when the plurality of flat tubes (412) are joined to the plurality of notched edge portions (422).

Description

熱交換器および熱交換器の製造方法Heat exchanger and heat exchanger manufacturing method
　本発明は、熱交換器および熱交換器の製造方法に関する。 The present invention relates to a heat exchanger and a method for manufacturing the heat exchanger.
　第１ヘッダ集合管、第２ヘッダ集合管、扁平管、およびフィンが互いにロウ付けにより接合されてなる熱交換器が知られている（日本の特開２０１５－３１４９１号公報を参照）。 A heat exchanger is known in which a first header collecting pipe, a second header collecting pipe, a flat tube, and fins are joined to each other by brazing (see Japanese Patent Application Laid-Open No. 2015-31491).
　扁平管がフィンに圧入される場合に、扁平管とフィンの間の摩擦力によって、扁平管がフィンに挿入され難い場合がある。この場合に、扁平管が強引にフィンに圧入されると、扁平管およびフィンが破損する恐れがある。 When the flat tube is press-fitted into the fin, the flat tube may be difficult to insert into the fin due to the frictional force between the flat tube and the fin. In this case, if the flat tube is forcibly pressed into the fin, the flat tube and the fin may be damaged.
　本発明の課題は、扁平管とフィンの取り付け易さを向上させた熱交換器および熱交換器の製造方法を提供することである。 An object of the present invention is to provide a heat exchanger and a heat exchanger manufacturing method that improve the ease of attaching a flat tube and a fin.
　本発明の第１観点に係る熱交換器は、積層された複数のフィンと、複数の扁平管とを備える。複数の扁平管は、複数のフィンの積層方向に対して交差する交差方向に並んで配置されている。複数のフィンのそれぞれは、複数の扁平管のそれぞれと接合された複数の挿入口縁部を有する。複数のフィンのうち少なくとも１つのフィンは、少なくとも１つの凸部を有する。少なくとも１つの凸部は、積層方向に突出し、かつ、複数の挿入口縁部への複数の扁平管の接合時に変形する。 The heat exchanger according to the first aspect of the present invention includes a plurality of laminated fins and a plurality of flat tubes. The plurality of flat tubes are arranged side by side in a crossing direction that intersects the stacking direction of the plurality of fins. Each of the plurality of fins has a plurality of insertion port edges joined to each of the plurality of flat tubes. At least one fin among the plurality of fins has at least one convex portion. At least one convex part protrudes in the lamination direction, and is deformed when the plurality of flat tubes are joined to the plurality of insertion port edges.
　本発明の第１観点に係る熱交換器では、少なくとも１つのフィンは、積層方向に突出し、かつ、複数の挿入口縁部への複数の扁平管の接合時に変形する凸部を有する。複数の挿入口縁部への複数の扁平管の接合時に凸部が変形することによって、少なくとも１つの挿入口縁部が広げられる。挿入口縁部が広がることにより、挿入口縁部と扁平管の間の摩擦力が低減される。摩擦力が低減されるので、扁平管およびフィンの取り付け易さを向上させることができる。その結果、扁平管およびフィンの破損を抑制することが期待できる。 In the heat exchanger according to the first aspect of the present invention, at least one fin has a convex portion that protrudes in the stacking direction and deforms when the plurality of flat tubes are joined to the plurality of insertion port edges. When the plurality of flat tubes are joined to the plurality of insertion port edges, the convex portion is deformed, so that at least one insertion port edge is expanded. By widening the insertion edge, the frictional force between the insertion edge and the flat tube is reduced. Since the frictional force is reduced, the ease of attaching the flat tube and the fin can be improved. As a result, it can be expected that damage to the flat tube and the fins is suppressed.
　本発明の第２観点に係る熱交換器においては、少なくとも１つのフィンは、少なくとも１つの挿入口縁部から、積層方向と交差方向とを含む平面に直交する直交方向に離れた位置に、凸部を有する。 In the heat exchanger according to the second aspect of the present invention, the at least one fin protrudes from the at least one insertion port edge at a position separated in the orthogonal direction perpendicular to the plane including the stacking direction and the intersecting direction. Part.
　本発明の第２観点に係る熱交換器では、少なくとも１つのフィンが上述の位置に少なくとも１つの凸部を有するので、少なくとも１つの挿入口縁部を効果的に広げることができる。 In the heat exchanger according to the second aspect of the present invention, since at least one fin has at least one convex portion at the above-described position, it is possible to effectively widen at least one insertion port edge.
　本発明の第３観点に係る熱交換器においては、少なくとも１つのフィンは、複数の凸部を有する。複数の凸部は、複数の挿入口縁部のそれぞれから、直交方向に離れた位置に、形成されている。 In the heat exchanger according to the third aspect of the present invention, at least one fin has a plurality of convex portions. The plurality of convex portions are formed at positions separated from each of the plurality of insertion opening edge portions in the orthogonal direction.
　本発明の第３観点に係る熱交換器では、少なくとも１つのフィンが上述の位置に複数の凸部、すなわち挿入口縁部の数だけの凸部を有するので、当該フィンの全ての挿入口縁部を効果的に広げることができる。したがって、複数の凸部を有する全てのフィンにおいて、扁平管とフィンの取り付け易さを向上させることができる。 In the heat exchanger according to the third aspect of the present invention, since at least one fin has a plurality of convex portions at the above-described positions, that is, the number of convex portions corresponding to the number of insertion port edges, all the insertion ports of the fins The part can be effectively expanded. Therefore, in all the fins having a plurality of convex portions, the ease of attaching the flat tube and the fins can be improved.
　本発明の第４観点に係る熱交換器においては、複数のフィンのそれぞれは、複数の凸部を有する。複数のフィンのそれぞれにおける、複数の凸部は、複数の挿入口縁部のそれぞれから、直交方向に離れた位置に、形成されている。 In the heat exchanger according to the fourth aspect of the present invention, each of the plurality of fins has a plurality of convex portions. The plurality of convex portions in each of the plurality of fins are formed at positions separated from each of the plurality of insertion port edge portions in the orthogonal direction.
　本発明の第４観点に係る熱交換器では、全てのフィンが上述の位置に複数の凸部、すなわち挿入口縁部の数だけの凸部を有するので、全てのフィンの全ての挿入口縁部を効果的に広げることができる。したがって、全てのフィンにおいて、扁平管とフィンの取り付け易さを向上させることができる。 In the heat exchanger according to the fourth aspect of the present invention, since all the fins have a plurality of convex portions at the above-described positions, that is, the number of convex portions corresponding to the number of the insertion port edges, all the insertion ports of all the fins The part can be effectively expanded. Therefore, in all the fins, the ease of attaching the flat tube and the fins can be improved.
　本発明の第５観点に係る熱交換器においては、少なくとも１つのフィンは、少なくとも１つの挿入口縁部と、少なくとも１つの挿入口縁部に隣接する挿入口縁部との間に、凸部を有する。 In the heat exchanger according to the fifth aspect of the present invention, at least one fin has a convex portion between at least one insertion port edge and an insertion port edge adjacent to the at least one insertion port edge. Have
　本発明の第５観点に係る熱交換器では、少なくとも１つのフィンが上述の位置に少なくとも１つの凸部を有するので、少なくとも、凸部を挟んで対向する２つの挿入口縁部を効果的に広げることができる。 In the heat exchanger according to the fifth aspect of the present invention, since at least one fin has at least one convex portion at the above-described position, at least two insertion port edge portions opposed to each other with the convex portion interposed therebetween are effectively provided. Can be spread.
　本発明の第６観点に係る熱交換器においては、少なくとも１つのフィンは、複数の凸部を有する。複数の凸部は、複数の挿入口縁部の、隣接する２つの挿入口縁部の間のそれぞれに、形成されている。 In the heat exchanger according to the sixth aspect of the present invention, at least one fin has a plurality of convex portions. The plurality of convex portions are formed on each of the plurality of insertion opening edge portions between two adjacent insertion opening edge portions.
　本発明の第６観点に係る熱交換器では、少なくとも１つのフィンが上述の位置に複数の凸部、すなわち挿入口縁部の総数よりも１だけ少ない数の凸部を有する。当該フィンにおいては、全ての挿入口縁部に隣接して凸部が形成されているので、当該フィンの全ての挿入口縁部を効果的に広げることができる。したがって、複数の凸部を有する全てのフィンにおいて、扁平管とフィンの取り付け易さを向上させることができる。 In the heat exchanger according to the sixth aspect of the present invention, at least one fin has a plurality of convex portions, that is, a number of convex portions which is one less than the total number of the insertion port edge portions at the above-described position. In the said fin, since the convex part is formed adjacent to all the insertion opening edge parts, all the insertion opening edge parts of the said fin can be expanded effectively. Therefore, in all the fins having a plurality of convex portions, the ease of attaching the flat tube and the fins can be improved.
　本発明の第７観点に係る熱交換器においては、複数のフィンのそれぞれは、複数の凸部を有する。複数のフィンのそれぞれにおける、複数の凸部は、複数の挿入口縁部の、隣接する２つの挿入口縁部の間のそれぞれに、形成されている。 In the heat exchanger according to the seventh aspect of the present invention, each of the plurality of fins has a plurality of convex portions. The plurality of convex portions in each of the plurality of fins are formed on each of the plurality of insertion opening edge portions between two adjacent insertion opening edge portions.
　本発明の第７観点に係る熱交換器では、全てのフィンが上述の位置に複数の凸部、すなわち挿入口縁部の総数よりも１だけ少ない数の凸部を有する。全てのフィンにおいて、全ての挿入口縁部に隣接して凸部が形成されているので、全てのフィンの全ての挿入口縁部を効果的に広げることができる。したがって、全てのフィンにおいて、扁平管とフィンの取り付け易さを向上させることができる。 In the heat exchanger according to the seventh aspect of the present invention, all the fins have a plurality of convex portions at the above-described positions, that is, the number of convex portions that is one less than the total number of the insertion port edge portions. In all the fins, since the convex portions are formed adjacent to all the insertion opening edges, it is possible to effectively widen all the insertion opening edges of all the fins. Therefore, in all the fins, the ease of attaching the flat tube and the fins can be improved.
　本発明の第８観点に係る熱交換器の製造方法は、第１工程と、第２工程とを備えている。第１工程では、複数のフィンを積層する。複数のフィンは、それぞれ、複数の挿入口縁部を有し、少なくとも１つのフィンが少なくとも１つの凸部を有する。第２工程では、複数の扁平管を、フィンの挿入口縁部に接合させる。複数の扁平管は、複数のフィンの積層方向に対して交差する交差方向に並んで配置される。第２工程においては、フィンの凸部が積層方向に突出しており、扁平管がフィンの挿入口縁部に接合するときに、フィンが変形する。 The method for manufacturing a heat exchanger according to the eighth aspect of the present invention includes a first step and a second step. In the first step, a plurality of fins are stacked. Each of the plurality of fins has a plurality of insertion edge portions, and at least one fin has at least one convex portion. In the second step, the plurality of flat tubes are joined to the insertion edge of the fin. The plurality of flat tubes are arranged side by side in an intersecting direction that intersects the stacking direction of the plurality of fins. In the second step, the convex portion of the fin protrudes in the stacking direction, and the fin is deformed when the flat tube is joined to the insertion opening edge of the fin.
　本発明の第８観点に係る熱交換器の製造方法では、第２工程において、少なくとも１つのフィンが積層方向に突出し、挿入口縁部への扁平管の接合時にフィンの凸部が変形する。これにより、挿入口縁部と扁平管の間の摩擦力が低減され、扁平管およびフィンの取り付け易さを向上させることができる。その結果、扁平管およびフィンの破損を抑制することが期待できる。 In the heat exchanger manufacturing method according to the eighth aspect of the present invention, in the second step, at least one fin protrudes in the stacking direction, and the convex portion of the fin is deformed when the flat tube is joined to the insertion port edge. Thereby, the frictional force between an insertion port edge part and a flat tube is reduced, and the attachment ease of a flat tube and a fin can be improved. As a result, it can be expected that damage to the flat tube and the fins is suppressed.
　本発明の第９観点に係る熱交換器の製造方法では、第２工程において、扁平管がフィンの挿入口に圧入されることによって、扁平管がフィンの挿入口縁部に接合する。そして、扁平管がフィンの挿入口縁部に接合するときに、フィンの凸部が広げられる。 In the heat exchanger manufacturing method according to the ninth aspect of the present invention, in the second step, the flat tube is press-fitted into the fin insertion port, so that the flat tube is joined to the fin insertion port edge. And when a flat tube joins to the insertion port edge part of a fin, the convex part of a fin is expanded.
　本発明の第１観点に係る熱交換器では、挿入口縁部と扁平管の間の摩擦力を低減させることにより、扁平管およびフィンの取り付け易さを向上させることができる。その結果、扁平管およびフィンの破損を抑制することが期待できる。 In the heat exchanger according to the first aspect of the present invention, the ease of attaching the flat tube and the fins can be improved by reducing the frictional force between the insertion port edge and the flat tube. As a result, it can be expected that damage to the flat tube and the fins is suppressed.
　本発明の第２観点に係る熱交換器では、少なくとも１つのフィンが少なくとも１つの挿入口縁部から直交方向に離れた凸部を有するので、少なくとも１つの挿入口縁部を効果的に広げることができる。 In the heat exchanger according to the second aspect of the present invention, at least one fin has a convex portion that is separated from at least one insertion port edge in the orthogonal direction, so that at least one insertion port edge is effectively widened. Can do.
　本発明の第３観点に係る熱交換器では、少なくとも１つのフィンが複数の挿入口縁部のそれぞれから直交方向に離れた複数の凸部を有するので、少なくとも１つのフィンの全ての挿入口縁部を効果的に広げることができる。したがって、複数の凸部を有する全てのフィンにおいて、扁平管とフィンの取り付け易さを向上させることができる。 In the heat exchanger according to the third aspect of the present invention, since at least one fin has a plurality of convex portions separated from each of the plurality of insertion port edges in the orthogonal direction, all the insertion ports of at least one fin The part can be effectively expanded. Therefore, in all the fins having a plurality of convex portions, the ease of attaching the flat tube and the fins can be improved.
　本発明の第４観点に係る熱交換器では、全てのフィンが複数の挿入口縁部のそれぞれから直交方向に離れた複数の凸部を有するので、全てのフィンの全ての挿入口縁部を効果的に広げることができる。したがって、全てのフィンにおいて、扁平管とフィンの取り付け易さを向上させることができる。 In the heat exchanger according to the fourth aspect of the present invention, since all the fins have a plurality of convex portions separated from each of the plurality of insertion port edges in the orthogonal direction, all the insertion port edges of all the fins are provided. Can be spread effectively. Therefore, in all the fins, the ease of attaching the flat tube and the fins can be improved.
　本発明の第５観点に係る熱交換器では、少なくとも１つのフィンが少なくとも１つの挿入口縁部と、少なくとも１つの挿入口縁部に隣接する挿入口縁部との間に凸部を有するので、少なくとも、凸部を挟んで対向する２つの挿入口縁部を効果的に広げることができる。 In the heat exchanger according to the fifth aspect of the present invention, at least one fin has a convex portion between at least one insertion port edge and an insertion port edge adjacent to the at least one insertion port edge. At least the two insertion opening edge portions that face each other with the convex portion interposed therebetween can be effectively widened.
　本発明の第６観点に係る熱交換器では、少なくとも１つのフィンにおいては、全ての挿入口縁部に隣接して凸部が形成されているので、当該フィンの全ての挿入口縁部を効果的に広げることができる。したがって、複数の凸部を有する全てのフィンにおいて、扁平管とフィンの取り付け易さを向上させることができる。 In the heat exchanger according to the sixth aspect of the present invention, in at least one fin, since the convex portions are formed adjacent to all the insertion port edges, all the insertion port edges of the fins are effective. Can be expanded. Therefore, in all the fins having a plurality of convex portions, the ease of attaching the flat tube and the fins can be improved.
　本発明の第７観点に係る熱交換器では、全てのフィンにおいて、全ての挿入口縁部に隣接して凸部が形成されているので、全てのフィンの全ての挿入口縁部を効果的に広げることができる。したがって、全てのフィンにおいて、扁平管とフィンの取り付け易さを向上させることができる。 In the heat exchanger according to the seventh aspect of the present invention, since the convex portions are formed adjacent to all the insertion port edge portions in all the fins, all the insertion port edge portions of all the fins are effective. Can be spread. Therefore, in all the fins, the ease of attaching the flat tube and the fins can be improved.
　本発明の第８観点および第９観点に係る熱交換器の製造方法では、挿入口縁部と扁平管の間の摩擦力を低減させることにより、扁平管およびフィンの取り付け易さを向上させることができる。その結果、扁平管およびフィンの破損を抑制することが期待できる。 In the heat exchanger manufacturing method according to the eighth aspect and the ninth aspect of the present invention, the ease of attaching the flat tube and the fin is improved by reducing the frictional force between the insertion port edge and the flat tube. Can do. As a result, it can be expected that damage to the flat tube and the fins is suppressed.
室外熱交換器を備える空気調和機の構成を説明する図である。It is a figure explaining the structure of an air conditioner provided with an outdoor heat exchanger. 室外熱交換器の外観斜視図である。It is an external appearance perspective view of an outdoor heat exchanger. 熱交換部を説明する図である。It is a figure explaining a heat exchange part. 図３のＩＶ－ＩＶ断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. 複数の扁平管が複数の切欠部に圧入される前のフィンの断面図である。It is sectional drawing of the fin before a some flat tube is press-fitted in a some notch part. 第１凸部を説明する図である。It is a figure explaining a 1st convex part. 第２凸部を説明する図である。It is a figure explaining a 2nd convex part.
　本発明の実施形態を以下に示す。なお、以下の実施形態は、具体例に過ぎず、特許請求の範囲に係る発明を限定するものではない。 Embodiments of the present invention are shown below. The following embodiments are merely specific examples and do not limit the invention according to the claims.
　＜第１実施形態＞
　（１）空気調和機
　（１－１）空気調和機の概略構成
　図１は、本発明の一実施形態に係る熱交換器の一例としての室外熱交換器４００を備える空気調和機１００の構成を説明する図である。空気調和機１００は、熱源側ユニットとしての空調室外機２００と、利用側ユニットとしての空調室内機３００とを含む。空調室外機２００と空調室内機３００は、液冷媒の冷媒連絡配管１０１およびガス冷媒の冷媒連絡配管１０２を介して、互いに接続されている。 <First Embodiment>
(1) Air Conditioner (1-1) Schematic Configuration of Air Conditioner FIG. 1 shows a configuration of an air conditioner 100 including an outdoor heat exchanger 400 as an example of a heat exchanger according to an embodiment of the present invention. It is a figure explaining. The air conditioner 100 includes an air conditioning outdoor unit 200 as a heat source side unit and an air conditioning indoor unit 300 as a use side unit. The air-conditioning outdoor unit 200 and the air-conditioning indoor unit 300 are connected to each other via a liquid refrigerant refrigerant communication pipe 101 and a gas refrigerant refrigerant communication pipe 102.
　空気調和機１００の冷媒回路は、空調室外機２００、空調室内機３００、冷媒連絡配管１０１、および冷媒連絡配管１０２によって、構成されている。より詳細には、冷媒回路は、膨張弁２０３、圧縮機２０４、四路切換弁２０５、アキュムレータ２０６、室内熱交換器３０１および室外熱交換器４００を含む。 The refrigerant circuit of the air conditioner 100 includes an air conditioning outdoor unit 200, an air conditioning indoor unit 300, a refrigerant communication pipe 101, and a refrigerant communication pipe 102. More specifically, the refrigerant circuit includes an expansion valve 203, a compressor 204, a four-way switching valve 205, an accumulator 206, an indoor heat exchanger 301, and an outdoor heat exchanger 400.
　（１－２）空気調和機の詳細構成
　（１－２－１）空調室内機
　空調室内機３００は、室内熱交換器３０１と、室内ファン３０２とを有する。室内熱交換器３０１は、例えば、伝熱管と多数のフィンとにより構成されたクロスフィン式のフィンアンドチューブ型熱交換器である。室内熱交換器３０１は、冷房運転時に冷媒の蒸発器として機能して室内空気を冷却し、暖房運転時に冷媒の凝縮器として機能して室内空気を加熱する。 (1-2) Detailed Configuration of Air Conditioner (1-2-1) Air Conditioning Indoor Unit The air conditioning indoor unit 300 includes an indoor heat exchanger 301 and an indoor fan 302. The indoor heat exchanger 301 is, for example, a cross fin type fin-and-tube heat exchanger configured by heat transfer tubes and a large number of fins. The indoor heat exchanger 301 functions as a refrigerant evaporator during cooling operation to cool indoor air, and functions as a refrigerant condenser during heating operation to heat indoor air.
　（１－２－２）空調室外機
　空調室外機２００は、ガス冷媒配管２０１と、液冷媒配管２０２と、膨張弁２０３と、圧縮機２０４と、四路切換弁２０５と、アキュムレータ２０６と、室外ファン２０７と、室外熱交換器４００とを有する。ガス冷媒配管２０１の一端は、室外熱交換器４００のガス側端部に接続され、ガス冷媒配管２０１の他端は、四路切換弁２０５に接続されている。液冷媒配管２０２の一端は、室外熱交換器４００の液側端部に接続され、液冷媒配管２０２の他端は、膨張弁２０３に接続されている。 (1-2-2) Air Conditioning Outdoor Unit The air conditioning outdoor unit 200 includes a gas refrigerant pipe 201, a liquid refrigerant pipe 202, an expansion valve 203, a compressor 204, a four-way switching valve 205, an accumulator 206, an outdoor unit. The fan 207 and the outdoor heat exchanger 400 are included. One end of the gas refrigerant pipe 201 is connected to the gas side end of the outdoor heat exchanger 400, and the other end of the gas refrigerant pipe 201 is connected to the four-way switching valve 205. One end of the liquid refrigerant pipe 202 is connected to the liquid side end of the outdoor heat exchanger 400, and the other end of the liquid refrigerant pipe 202 is connected to the expansion valve 203.
　膨張弁２０３は、冷媒を減圧する機構である。膨張弁２０３は、室外熱交換器４００と冷媒連絡配管１０１の間に設けられている。圧縮機２０４は、圧縮機用モータによって駆動される密閉式圧縮機である。 The expansion valve 203 is a mechanism that depressurizes the refrigerant. The expansion valve 203 is provided between the outdoor heat exchanger 400 and the refrigerant communication pipe 101. The compressor 204 is a hermetic compressor driven by a compressor motor.
　四路切換弁２０５は、冷媒が流れる方向を切り換える機構である。冷房運転時には、図１の四路切換弁２０５の実線に示されるように、四路切換弁２０５は、圧縮機２０４の吐出側の冷媒配管とガス冷媒配管２０１を接続すると共に、アキュムレータ２０６を介して、圧縮機２０４の吸入側の冷媒配管と冷媒連絡配管１０２を接続する。一方、暖房運転時には、図１の四路切換弁２０５の破線に示されるように、四路切換弁２０５は、圧縮機２０４の吐出側の冷媒配管と冷媒連絡配管１０２を接続すると共に、アキュムレータ２０６を介して、圧縮機２０４の吸入側の冷媒配管とガス冷媒配管２０１を接続する。 The four-way switching valve 205 is a mechanism that switches the direction in which the refrigerant flows. During cooling operation, as shown by the solid line of the four-way switching valve 205 in FIG. 1, the four-way switching valve 205 connects the refrigerant pipe 201 on the discharge side of the compressor 204 and the gas refrigerant pipe 201 and passes through the accumulator 206. Thus, the refrigerant pipe on the suction side of the compressor 204 and the refrigerant communication pipe 102 are connected. On the other hand, during heating operation, as shown by the broken line of the four-way switching valve 205 in FIG. 1, the four-way switching valve 205 connects the refrigerant pipe on the discharge side of the compressor 204 and the refrigerant communication pipe 102 and also accumulator 206. Then, the refrigerant pipe on the suction side of the compressor 204 and the gas refrigerant pipe 201 are connected.
　アキュムレータ２０６は、圧縮機２０４と四路切換弁２０５の間に設けられている。アキュムレータ２０６は、冷媒を気相と液相に分ける。室外ファン２０７は、室外空気を室外熱交換器４００に供給する。 The accumulator 206 is provided between the compressor 204 and the four-way switching valve 205. The accumulator 206 divides the refrigerant into a gas phase and a liquid phase. The outdoor fan 207 supplies outdoor air to the outdoor heat exchanger 400.
　（１－３）空気調和機の動作
　（１－３－１）冷房運転
　膨張弁２０３の開度は、室内熱交換器３０１の出口（すなわち、室内熱交換器３０１のガス側）における冷媒の過熱度が一定になるように、調整されている。冷房運転時の四路切換弁２０５の接続状態は、既に説明した通りである。 (1-3) Operation of the air conditioner (1-3-1) Cooling operation The opening degree of the expansion valve 203 is determined by the refrigerant overheating at the outlet of the indoor heat exchanger 301 (that is, the gas side of the indoor heat exchanger 301). The degree is adjusted to be constant. The connection state of the four-way switching valve 205 during the cooling operation is as already described.
　以上のような状態の冷媒回路において、圧縮機２０４から吐出された冷媒は、四路切換弁２０５を通って室外熱交換器４００へ流入し、室外空気へ放熱して凝縮する。室外熱交換器４００から流出された冷媒は、膨張弁２０３を通過するときに膨張する。その後、室内熱交換器３０１へ流入し、室内空気から吸熱して蒸発する。 In the refrigerant circuit in the above-described state, the refrigerant discharged from the compressor 204 flows into the outdoor heat exchanger 400 through the four-way switching valve 205, dissipates heat to the outdoor air, and condenses. The refrigerant that has flowed out of the outdoor heat exchanger 400 expands when it passes through the expansion valve 203. Then, it flows into the indoor heat exchanger 301, absorbs heat from the indoor air, and evaporates.
　（１－３－２）暖房運転
　膨張弁２０３の開度は、室内熱交換器３０１の出口における冷媒の過冷却度が過冷却度目標値で一定になるように、調節されている。暖房運転時の四路切換弁２０５の接続状態は、既に説明した通りである。 (1-3-2) Heating Operation The opening degree of the expansion valve 203 is adjusted so that the degree of supercooling of the refrigerant at the outlet of the indoor heat exchanger 301 becomes constant at the target value of the degree of supercooling. The connection state of the four-way switching valve 205 during the heating operation is as already described.
　以上のような状態の冷媒回路において、圧縮機２０４から吐出された冷媒は、四路切換弁２０５を通って室内熱交換器３０１へ流入し、室内空気へ放熱して凝縮する。室内熱交換器３０１から流出した冷媒は、膨張弁２０３を通過するときに膨張する。その後、室外熱交換器４００へ流入し、室外空気から吸熱して蒸発する。室外熱交換器４００から流出した冷媒は、四路切換弁２０５を通過後に再び圧縮機２０４へ吸入されて圧縮される。 In the refrigerant circuit in the above state, the refrigerant discharged from the compressor 204 flows into the indoor heat exchanger 301 through the four-way switching valve 205, dissipates heat to the indoor air, and condenses. The refrigerant that has flowed out of the indoor heat exchanger 301 expands when it passes through the expansion valve 203. Then, it flows into the outdoor heat exchanger 400, absorbs heat from the outdoor air, and evaporates. The refrigerant flowing out of the outdoor heat exchanger 400 passes through the four-way switching valve 205 and is again sucked into the compressor 204 and compressed.
　（２）室外熱交換器
　（２－１）室外熱交換器の概略構成
　図２は、室外熱交換器４００の外観斜視図である。室外熱交換器４００は、熱交換部４１０と、出入口ヘッダ集合管４２０と、折返しヘッダ集合管４３０とを備える。熱交換部４１０、出入口ヘッダ集合管４２０、および折返しヘッダ集合管４３０は、互いにロウで接合されている。なお、本明細書では、後述する複数のフィン４１１が積層される積層方向をＸ軸方向と定義する。それぞれのフィン４１１の長手方向、すなわち、Ｘ軸方向に交差し、後述の複数の扁平管４１２が並んで配置されている方向をＹ軸方向と定義する。それぞれのフィン４１１の短手方向、すなわち、Ｘ軸方向とＹ軸方向を含む平面に直交する直交方向をＺ軸方向と定義する。 (2) Outdoor Heat Exchanger (2-1) Schematic Configuration of Outdoor Heat Exchanger FIG. 2 is an external perspective view of the outdoor heat exchanger 400. The outdoor heat exchanger 400 includes a heat exchange unit 410, an entrance / exit header collecting pipe 420, and a folded header collecting pipe 430. The heat exchanging section 410, the inlet / outlet header collecting pipe 420, and the folded header collecting pipe 430 are joined to each other by soldering. In this specification, a stacking direction in which a plurality of fins 411 described later are stacked is defined as an X-axis direction. The longitudinal direction of each fin 411, that is, the direction in which a plurality of flat tubes 412 described later are arranged side by side is defined as the Y-axis direction. A short direction of each fin 411, that is, an orthogonal direction orthogonal to a plane including the X-axis direction and the Y-axis direction is defined as a Z-axis direction.
　熱交換部４１０は、室外空気と冷媒の熱交換を行う。熱交換部４１０は、複数のフィン４１１と、複数の扁平管４１２とを備える。複数のフィン４１１および複数の扁平管４１２は、アルミニウム製、またはアルミニウム合金製である。複数のフィン４１１は、Ｘ軸方向に積層されている。複数の扁平管４１２は、Ｙ軸方向に並んで配置されている。 The heat exchanging unit 410 exchanges heat between the outdoor air and the refrigerant. The heat exchanging unit 410 includes a plurality of fins 411 and a plurality of flat tubes 412. The plurality of fins 411 and the plurality of flat tubes 412 are made of aluminum or aluminum alloy. The plurality of fins 411 are stacked in the X-axis direction. The plurality of flat tubes 412 are arranged side by side in the Y-axis direction.
　出入口ヘッダ集合管４２０は、熱交換部４１０のＸ軸方向の一端側に設けられている。出入口ヘッダ集合管４２０は、扁平管４１２のＸ軸方向の一端近傍を固定している。出入口ヘッダ集合管４２０の内部空間は、扁平管４１２の内部流路と連通している。 The entrance / exit header collecting pipe 420 is provided on one end side in the X-axis direction of the heat exchanging section 410. The entrance / exit header collecting pipe 420 fixes the vicinity of one end of the flat pipe 412 in the X-axis direction. The internal space of the inlet / outlet header collecting pipe 420 communicates with the internal flow path of the flat pipe 412.
　折返しヘッダ集合管４３０は、熱交換部４１０のＸ軸方向の他端側に設けられている。折返しヘッダ集合管４３０は、扁平管４１２のＸ軸方向の他端近傍（すなわち、出入口ヘッダ集合管４２０側とは反対側の端部近傍）を固定している。折返しヘッダ集合管４３０の内部空間は、扁平管４１２の内部流路と連通している。 The folded header collecting pipe 430 is provided on the other end side in the X-axis direction of the heat exchange unit 410. The folded header collecting pipe 430 fixes the vicinity of the other end in the X-axis direction of the flat tube 412 (that is, the vicinity of the end opposite to the inlet / outlet header collecting pipe 420 side). The internal space of the folded header collecting pipe 430 communicates with the internal flow path of the flat pipe 412.
　（２－２）熱交換部の構成
　図３は、熱交換部４１０を説明する図である。図３は、図２の領域ＡのＹＺ断面の一部を拡大した図である。複数のフィン４１１の構造は、互いに共通している。したがって、ここでは、１つのフィン４１１を例に挙げてその構造を説明する。 (2-2) Configuration of Heat Exchanger FIG. 3 is a diagram for explaining the heat exchanger 410. FIG. 3 is an enlarged view of a part of the YZ cross section in the region A of FIG. The structure of the plurality of fins 411 is common to each other. Therefore, here, the structure of the fin 411 will be described as an example.
　フィン４１１は、板状の部材である。フィン４１１の形状は、全体として略矩形である。より詳細には、Ｙ軸方向を長辺、Ｚ軸方向を短辺とする矩形である。フィン４１１は、挿入口の一例としての、複数の切欠部４２１を有する。複数の切欠部４２１は、空気流れの風上側（すなわちＺ軸方向のマイナス側）に形成されている。複数の切欠部４２１は、Ｙ軸方向に間隔をあけて形成されている。複数の切欠部４２１には、複数の扁平管４１２のそれぞれが挿入されている。複数の切欠部４２１の、挿入口縁部の一例としての切欠縁部４２２は、複数の扁平管４１２のそれぞれと接合されている。本実施形態においては、切欠縁部４２２は、Ｕ字状に形成されている。 The fin 411 is a plate-like member. The shape of the fin 411 is substantially rectangular as a whole. More specifically, the rectangle has a long side in the Y-axis direction and a short side in the Z-axis direction. The fin 411 has a plurality of notches 421 as an example of an insertion port. The plurality of notches 421 are formed on the windward side of the air flow (that is, the minus side in the Z-axis direction). The plurality of notches 421 are formed at intervals in the Y-axis direction. Each of the plurality of flat tubes 412 is inserted into the plurality of notches 421. The notch edge part 422 as an example of the insertion port edge part of the some notch part 421 is joined with each of the some flat tube 412. FIG. In the present embodiment, the cutout edge 422 is formed in a U shape.
　複数の扁平管４１２は、伝熱管として機能する。冷媒はそれぞれの扁平管４１２の内部を流れ、それぞれの扁平管４１２はフィン４１１と室外空気の間を移動する熱を冷媒に伝達する。 The plurality of flat tubes 412 function as heat transfer tubes. The refrigerant flows inside each flat tube 412, and each flat tube 412 transmits heat moving between the fins 411 and outdoor air to the refrigerant.
　（２－３）扁平管の挿入前後のフィン
　図４は、扁平管４１２が圧入される前後のフィン４１１を説明する図である。図４Ａは、図３のＩＶ－ＩＶ断面図である。図４Ｂは、複数の扁平管４１２が複数の切欠部４２１に圧入される前のフィン４１１の断面図である。図４Ｂは、図４Ａに対応しており、図３のＩＶ－ＩＶ断面に相当する部分の断面図である。図５は、後述の第１凸部４４１を説明する図である。具体的には、図３のＶ－Ｖ断面図である。図６は、後述の第２凸部４４２を説明する図である。具体的には、図３のＶＩ－ＶＩ断面図である。 (2-3) Fins Before and After Insertion of Flat Tube FIG. 4 is a diagram illustrating the fins 411 before and after the flat tube 412 is press-fitted. 4A is a cross-sectional view taken along the line IV-IV in FIG. FIG. 4B is a cross-sectional view of the fin 411 before the plurality of flat tubes 412 are press-fitted into the plurality of notches 421. 4B corresponds to FIG. 4A and is a cross-sectional view of a portion corresponding to the IV-IV cross section of FIG. FIG. 5 is a diagram illustrating a first convex portion 441 described later. Specifically, it is a VV sectional view of FIG. FIG. 6 is a diagram illustrating a second convex portion 442 described later. Specifically, it is a VI-VI cross-sectional view of FIG.
　図４Ａに示されるように、フィン４１１は、凸部４４０を有する。凸部４４０は、第１凸部４４１と第２凸部４４２を含む。 As shown in FIG. 4A, the fin 411 has a convex portion 440. The convex portion 440 includes a first convex portion 441 and a second convex portion 442.
　第１凸部４４１は、切欠部４２１に対応して設けられている。より詳細には、第１凸部４４１は、切欠縁部４２２からＺ軸方向に離れた位置に設けられている。本実施形態においては、第１凸部４４１は、全ての切欠部４２１に対応して設けられている。すなわち、第１凸部４４１は、全ての切欠縁部４２２のそれぞれからＺ軸方向に離れた位置に、設けられている。 The 1st convex part 441 is provided corresponding to the notch part 421. More specifically, the first convex portion 441 is provided at a position away from the notch edge portion 422 in the Z-axis direction. In the present embodiment, the first convex portion 441 is provided corresponding to all the cutout portions 421. That is, the 1st convex part 441 is provided in the position away from each of all the notch edge parts 422 in the Z-axis direction.
　第１凸部４４１は、Ｘ軸方向に突出する凸部である。より詳細には、図５に示されるように、切欠縁部４２２のＹ軸方向の一端付近から切欠部４２１の中心部分にかけて盛り上がり、当該中心部分から切欠縁部４２２のＹ軸方向の他端付近にかけて盛り下がる。 The first convex portion 441 is a convex portion protruding in the X-axis direction. More specifically, as shown in FIG. 5, the notch edge 422 rises from near one end in the Y-axis direction to the center part of the notch part 421, and near the other end of the notch edge part 422 in the Y-axis direction. It goes up and down.
　第２凸部４４２は、Ｙ軸方向に隣接する２つの切欠縁部４２２の間の領域４５０に設けられている。本実施形態においては、第２凸部４４２は、全ての隣接する２つの切欠縁部４２２の間の領域に設けられている。 The second convex portion 442 is provided in a region 450 between two notched edge portions 422 adjacent in the Y-axis direction. In this embodiment, the 2nd convex part 442 is provided in the area | region between all the adjacent two notch edge parts 422. In FIG.
　第２凸部４４２は、Ｘ軸方向に突出する凸部である。より詳細には、図６に示されるように、一方の切欠縁部４２２における、他方の切欠縁部４２２側の端部付近から、領域４５０の中心部分にかけて盛り上がり、当該中心部分から、他方の切欠縁部４２２における、一方の切欠縁部４２２側の端部付近にかけて盛り下がる。第２凸部４４２の裾部分は、第１凸部４４１の裾部分よりも広い。 The second convex portion 442 is a convex portion protruding in the X-axis direction. More specifically, as shown in FIG. 6, one notch edge 422 rises from the vicinity of the other notch edge 422 side to the center portion of the region 450, and from the center portion to the other notch In the edge part 422, it swells up near the edge part of the one notch edge part 422 side. The bottom part of the second convex part 442 is wider than the bottom part of the first convex part 441.
　図４Ａおよび図４Ｂに示されるように、複数の扁平管４１２が複数の切欠部４２１に圧入される場合に、第１凸部４４１および第２凸部４４２は変形する。より詳細には、複数の扁平管４１２が複数の切欠部４２１にＸ軸方向から圧入されるので、第１凸部４４１はＹ軸方向に押し広げられる。すなわち、圧入後の第１凸部４４１の高さ（つまり第１凸部４４１の基点Ｘ３から頂点Ｘ４までのＸ軸方向の距離）Ｄ1は、圧入前の第１凸部４４１の高さ（つまり第１凸部４４１の基点Ｘ１から頂点Ｘ２までのＸ軸方向の距離）Ｄ2よりも低くなる。それと同時に、第１凸部４４１の高さが低くなることによって、それによる力が第１凸部４４１の周辺の領域に対しＹ軸方向に働く。結果として、第１凸部４４１および第２凸部４４２の裾部分が持ち上がる。したがって、圧入後の第２凸部４４２の高さ（つまり第２凸部４４２の基点Ｘ３から頂点Ｘ２までのＸ軸方向の距離）Ｄ3も、圧入前の第２凸部４４２の高さＤ2よりも低くなる。なお、複数の扁平管４１２が複数の切欠部４２１に圧入される前では、第１凸部４４１の高さと第２凸部４４２の高さは、略同一である。 As shown in FIGS. 4A and 4B, when the plurality of flat tubes 412 are press-fitted into the plurality of notches 421, the first protrusion 441 and the second protrusion 442 are deformed. More specifically, since the plurality of flat tubes 412 are press-fitted into the plurality of notches 421 from the X-axis direction, the first convex portion 441 is pushed and expanded in the Y-axis direction. That, (X-axis direction distance from the base point X3 to the apex X4 of words first convex portion 441) D 1 the height of the first convex portion 441 after press-fitting, the height of the first convex portion 441 of the front press fit ( That is lower than the X-axis direction distance) D 2 to the vertex X2 from the origin X1 of the first convex portion 441. At the same time, the height of the first convex portion 441 decreases, and the resulting force acts on the area around the first convex portion 441 in the Y-axis direction. As a result, the bottom portions of the first and second convex portions 441 and 442 are lifted. Thus, (X-axis direction distance from the base point X3 in other words the second convex portion 442 to the apex X2) the height of the second convex portion 442 after press-fitting D 3 also, the height D of the second convex portion 442 of the front press fit Lower than 2 . Note that before the plurality of flat tubes 412 are press-fitted into the plurality of notches 421, the height of the first protrusion 441 and the height of the second protrusion 442 are substantially the same.
　（２－４）室外熱交換器の製造方法
　室外熱交換器４００は、上述のように、熱交換部４１０と、出入口ヘッダ集合管４２０と、折返しヘッダ集合管４３０とを備え、これらの熱交換部４１０、出入口ヘッダ集合管４２０、および折返しヘッダ集合管４３０は、互いにロウ付けされる。 (2-4) Manufacturing Method of Outdoor Heat Exchanger As described above, the outdoor heat exchanger 400 includes the heat exchange unit 410, the inlet / outlet header collecting pipe 420, and the folded header collecting pipe 430, and these heat exchanges. The section 410, the entrance / exit header collecting pipe 420, and the folded header collecting pipe 430 are brazed to each other.
　まず、第１工程において、複数のフィン４１１が積層される。 First, in the first step, a plurality of fins 411 are stacked.
　次に、第２工程において、複数のフィン４１１の積層方向（Ｘ軸方向）と交差するＹ軸方向に並ぶ複数の扁平管４１２が、複数のフィン４１１の複数の切欠部４２１に、Ｘ軸方向から圧入される。このとき、上述のように、第１凸部４４１および第２凸部４４２が変形し、第１凸部４４１はＹ軸方向に広げられる。これにより、複数のフィン４１１の切欠縁部４２２が扁平管４１２に接合する。 Next, in the second step, the plurality of flat tubes 412 arranged in the Y-axis direction intersecting the stacking direction (X-axis direction) of the plurality of fins 411 are arranged in the plurality of notches 421 of the plurality of fins 411 in the X-axis direction. It is press-fitted from. At this time, as described above, the first convex portion 441 and the second convex portion 442 are deformed, and the first convex portion 441 is expanded in the Y-axis direction. As a result, the notched edge portions 422 of the plurality of fins 411 are joined to the flat tube 412.
　複数のフィン４１１と複数の扁平管４１２は、複数の扁平管４１２のそれぞれが複数の切欠部４２１に嵌め込まれた状態で、仮固定される。仮固定された複数のフィン４１１および複数の扁平管４１２は、次の工程においてロウ付けされる。 The plurality of fins 411 and the plurality of flat tubes 412 are temporarily fixed in a state where each of the plurality of flat tubes 412 is fitted into the plurality of notches 421. The plurality of temporarily fixed fins 411 and the plurality of flat tubes 412 are brazed in the next step.
　（３）室外熱交換器の特徴
　本実施形態の室外熱交換器４００は、複数のフィン４１１と複数の扁平管４１２を備える。複数のフィン４１１のそれぞれは、複数の扁平管４１２のそれぞれと接合された複数の切欠縁部４２２を有する。複数のフィン４１１のそれぞれは、切欠縁部４２２の数だけ第１凸部４４１を有する。より詳細には、複数の切欠縁部４２２のそれぞれからＺ軸方向に離れた位置に、第１凸部４４１を有する。第１凸部４４１は、複数の切欠縁部４２２への複数の扁平管４１２の圧入時に変形する、すなわち、Ｙ軸方向に押し広げられる。これにより、全ての切欠縁部４２２が広げられる。すなわち、全ての切欠部４２１のＹ軸方向の幅が広げられる。全ての切欠縁部４２２が広げられることにより、切欠縁部４２２と扁平管４１２の間の摩擦力が低減される。摩擦力が低減されるので、扁平管４１２およびフィン４１１の取り付け易さを向上させることができる。その結果、扁平管４１２およびフィン４１１の破損を抑制することが期待できる。 (3) Features of outdoor heat exchanger The outdoor heat exchanger 400 of this embodiment includes a plurality of fins 411 and a plurality of flat tubes 412. Each of the plurality of fins 411 has a plurality of notched edges 422 joined to each of the plurality of flat tubes 412. Each of the plurality of fins 411 has the first convex portion 441 by the number of the cutout edge portions 422. More specifically, the first convex portion 441 is provided at a position away from each of the plurality of cutout edge portions 422 in the Z-axis direction. The first convex portion 441 is deformed when the plurality of flat tubes 412 are press-fitted into the plurality of cutout edge portions 422, that is, is pushed and expanded in the Y-axis direction. Thereby, all the notch edges 422 are expanded. That is, the width in the Y-axis direction of all the notches 421 is increased. By expanding all the notched edges 422, the frictional force between the notched edges 422 and the flat tube 412 is reduced. Since the frictional force is reduced, the ease of attaching the flat tube 412 and the fin 411 can be improved. As a result, it can be expected that damage to the flat tubes 412 and the fins 411 is suppressed.
　特に、本実施形態の室外熱交換器４００においては、全てのフィン４１１が切欠縁部４２２の数だけ第１凸部４４１を有するので、全てのフィン４１１の全ての切欠縁部４２２を効果的に広げることができる。したがって、全てのフィン４１１において、扁平管４１２とフィン４１１の取り付け易さを向上させることができる。 In particular, in the outdoor heat exchanger 400 of the present embodiment, since all the fins 411 have the first convex portions 441 as many as the number of the notched edge portions 422, all the notched edge portions 422 of all the fins 411 are effectively provided. Can be spread. Therefore, in all the fins 411, the ease of attaching the flat tubes 412 and the fins 411 can be improved.
　本実施形態の室外熱交換器４００においては、複数のフィン４１１のそれぞれは、切欠縁部４２２の総数よりも１だけ少ない数の第２凸部４４２を有する。より詳細には、複数の切欠縁部４２２の、隣接する２つの切欠縁部４２２の間のそれぞれに、第２凸部４４２を有する。第２凸部４４２は、複数の切欠縁部４２２への複数の扁平管４１２の圧入時に変形する、すなわち、Ｙ軸方向に押し広げられる。これにより、全ての切欠縁部４２２が広げられる。全ての切欠縁部４２２が広げられることにより、切欠縁部４２２が広げられることにより、切欠縁部４２２と扁平管４１２の間の摩擦力が低減される。したがって、上述のように、扁平管４１２およびフィン４１１の取り付け易さを向上させることができ、結果として、扁平管４１２およびフィン４１１の破損を抑制することが期待できる。 In the outdoor heat exchanger 400 of the present embodiment, each of the plurality of fins 411 has the number of second convex portions 442 that is one less than the total number of notched edge portions 422. More specifically, each of the plurality of cutout edge portions 422 has a second convex portion 442 between two adjacent cutout edge portions 422. The second convex portion 442 is deformed when the plurality of flat tubes 412 are press-fitted into the plurality of cut-out edge portions 422, that is, is pushed and expanded in the Y-axis direction. Thereby, all the notch edges 422 are expanded. By expanding all the notch edges 422, the notch edges 422 are expanded, so that the frictional force between the notch edges 422 and the flat tube 412 is reduced. Therefore, as described above, the ease of attaching the flat tubes 412 and the fins 411 can be improved, and as a result, it can be expected that the flat tubes 412 and the fins 411 are prevented from being damaged.
　特に、本実施形態の室外熱交換器４００においては、全てのフィン４１１が切欠縁部４２２の総数よりも１だけ少ない数の第２凸部４４２を有するので、全てのフィン４１１の全ての切欠縁部４２２を効果的に広げることができる。したがって、全てのフィン４１１において、扁平管４１２とフィン４１１の取り付け易さを向上させることができる。 In particular, in the outdoor heat exchanger 400 of the present embodiment, since all the fins 411 have the number of the second convex portions 442 that is one less than the total number of the notched edge portions 422, all the notched edges of all the fins 411 are included. The part 422 can be effectively expanded. Therefore, in all the fins 411, the ease of attaching the flat tubes 412 and the fins 411 can be improved.
　＜変形例＞
　本発明の実施形態に適用可能な変形例を説明する。 <Modification>
A modification applicable to the embodiment of the present invention will be described.
　（１）変形例Ａ
　以上の説明では、全てのフィン４１１のそれぞれが、切欠縁部４２２の数と同数の第１凸部４４１を有したが、いくつかのフィン４１１は、切欠縁部４２２の数よりも少ない数の第１凸部４４１を有してもよいし、第１凸部４４１を全く有さなくてもよい。すなわち、少なくとも１つのフィン４１１が、切欠縁部４２２の数と同数の第１凸部４４１を有してもよい。この場合には、第１凸部４４１を有する全てのフィン４１１において、当該フィンの全ての切欠縁部４２２を効果的に広げることができる。また、切欠縁部４２２の数よりも少ない数の第１凸部４４１を有するフィンにおいては、少なくとも第１凸部４４１が設けられた切欠縁部４２２を効果的に広げることができる。以上のように、扁平管４１２とフィン４１１の取り付け易さを向上させることができる。 (1) Modification A
In the above description, each of all the fins 411 has the same number of first convex portions 441 as the number of notched edge portions 422, but some of the fins 411 have a smaller number than the number of notched edge portions 422. It may have the 1st convex part 441, and does not need to have the 1st convex part 441 at all. That is, at least one fin 411 may have the same number of first convex portions 441 as the number of notched edge portions 422. In this case, in all the fins 411 having the first convex portions 441, all the notched edge portions 422 of the fins can be effectively expanded. Further, in the fin having the first convex portions 441 smaller in number than the number of the notched edge portions 422, at least the notched edge portions 422 provided with the first convex portions 441 can be effectively expanded. As described above, the ease of attaching the flat tube 412 and the fins 411 can be improved.
　切欠縁部４２２の数と同数の第１凸部４４１を有するフィン４１１が存在しなくてもよい。すなわち、少なくとも１つのフィン４１１が、少なくとも１つの第１凸部４４１を有してもよい。この場合には、少なくとも１つのフィン４１１の、少なくとも１つの切欠縁部４２２を効果的に広げることができる。 The fins 411 having the same number of first convex portions 441 as the number of the notched edge portions 422 may not be present. That is, at least one fin 411 may have at least one first convex portion 441. In this case, at least one notch edge 422 of at least one fin 411 can be effectively expanded.
　以上の説明では、全てのフィン４１１のそれぞれが、切欠縁部４２２の数よりも１だけ少ない数の第２凸部４４２を有したが、いくつかのフィン４１１は、切欠縁部４２２の数よりも２以上少ない数の第２凸部４４２を有してもよいし、第２凸部４４２を全く有さなくてもよい。すなわち、少なくとも１つのフィン４１１が、切欠縁部４２２の数よりも１だけ少ない数の第２凸部４４２を有してもよい。この場合には、第２凸部４４２を有する全てのフィン４１１において、扁平管４１２とフィン４１１の取り付け易さを向上させることができる。また、切欠縁部４２２の数よりも２以上少ない数の第２凸部４４２を有するフィンにおいては、少なくとも第２凸部４４２を挟んで対向する２つの切欠縁部４２２を効果的に広げることができる。以上のように、扁平管４１２とフィン４１１の取り付け易さを向上させることができる。 In the above description, each of all the fins 411 has the number of the second convex portions 442 that is one less than the number of the notched edge portions 422, but some of the fins 411 have more than the number of the notched edge portions 422. Alternatively, the number of the second convex portions 442 may be smaller by two or more, or the second convex portions 442 may not be included at all. That is, at least one fin 411 may have the number of second convex portions 442 that is one less than the number of notched edge portions 422. In this case, in all the fins 411 having the second protrusions 442, the ease of attaching the flat tubes 412 and the fins 411 can be improved. Further, in the fin having the second convex portions 442 that is two or more smaller than the number of the notched edge portions 422, at least the two notched edge portions 422 facing each other across the second convex portions 442 can be effectively expanded. it can. As described above, the ease of attaching the flat tube 412 and the fins 411 can be improved.
　切欠縁部４２２の数よりも１だけ少ない数と同数の第２凸部４４２を有するフィン４１１が存在しなくてもよい。すなわち、少なくとも１つのフィン４１１が、少なくとも１つの第２凸部４４２を有してもよい。この場合には、少なくとも１つのフィン４１１の、少なくとも第２凸部４４２を挟んで対向する２つの切欠縁部４２２を効果的に広げることができる。 The fins 411 having the same number of the second convex portions 442 as the number of one less than the number of the notched edge portions 422 may not be present. That is, at least one fin 411 may have at least one second convex portion 442. In this case, it is possible to effectively widen the two notched edge portions 422 of the at least one fin 411 facing each other with at least the second convex portion 442 interposed therebetween.
　（２）変形例Ｂ
　以上の説明では、複数の扁平管４１２が複数の切欠部４２１に圧入されたが、圧入されなくてもよい。複数のフィン４１１と複数の扁平管４１２の接合前において、複数の切欠部４２１のＹ軸方向の幅は、複数の扁平管４１２のＹ軸方向の幅よりも十分に大きく形成されていてもよい。そして、複数の扁平管４１２が複数の切欠部４２１に挿入された後に、Ｙ軸方向に圧縮されてもよい。 (2) Modification B
In the above description, the plurality of flat tubes 412 are press-fitted into the plurality of notches 421, but may not be press-fitted. Before joining the plurality of fins 411 and the plurality of flat tubes 412, the width of the plurality of cutout portions 421 in the Y-axis direction may be sufficiently larger than the width of the plurality of flat tubes 412 in the Y-axis direction. . Then, after the plurality of flat tubes 412 are inserted into the plurality of cutout portions 421, they may be compressed in the Y-axis direction.
　この場合に、複数の扁平管４１２が複数の切欠部４２１に挿入された段階では、第１凸部４４１は、略平坦状である。Ｙ軸方向に圧縮されることにより、第１凸部４４１がＸ軸方向に盛り上がる。これにより、上述した、緩やかな（すなわち、押し広げられた状態の）第１凸部４４１が形成される。一方で、複数の扁平管４１２が複数の切欠部４２１に挿入された段階では、第２凸部４４２も、略平坦状である。Ｙ軸方向に圧縮されることにより、第２凸部４４２がＸ軸方向に盛り上がる。これにより、上述した、緩やかな第２凸部４４２が形成される。 In this case, at the stage where the plurality of flat tubes 412 are inserted into the plurality of notches 421, the first convex portion 441 is substantially flat. By compressing in the Y-axis direction, the first convex portion 441 rises in the X-axis direction. As a result, the above-described first convex portion 441 that is loose (that is, in a state of being spread) is formed. On the other hand, at the stage where the plurality of flat tubes 412 are inserted into the plurality of notches 421, the second convex portion 442 is also substantially flat. By being compressed in the Y-axis direction, the second convex portion 442 rises in the X-axis direction. Thereby, the above-described gentle second convex portion 442 is formed.
　以上のことから、複数の扁平管４１２が複数の切欠部４２１に圧入されようと、複数の切欠部４２１に挿入された後にＹ軸方向に圧縮されようと、第１凸部４４１および第２凸部４４２の形状は略同一になる。 From the above, whether the plurality of flat tubes 412 are press-fitted into the plurality of cutout portions 421 or inserted into the plurality of cutout portions 421 and then compressed in the Y-axis direction, the first convex portion 441 and the second convex portion The shape of the part 442 is substantially the same.
　（３）変形例Ｃ
　以上の説明では、挿入部として切欠部４２１を例に挙げたが、これに限られない。挿入部として、扁平管４１２の形状に合わせた開口部が形成されていてもよい。なお、この場合には、挿入口縁部として開口縁部が形成されている。 (3) Modification C
In the above description, the notch portion 421 is taken as an example of the insertion portion, but is not limited thereto. An opening that matches the shape of the flat tube 412 may be formed as the insertion portion. In this case, an opening edge is formed as the insertion opening edge.
　（４）変形例Ｄ
　以上の説明では、Ｘ軸方向に突出する第１凸部４４１は、図４Ａに示すような先端に角部を有するものであり、Ｘ軸方向に突出する第２凸部４４２は、図４Ａや図６に示すような殆ど角のない凸部であるが、これに限られない。それぞれの凸部は、エッジのある角を含むものであってもよいし、滑らかな湾曲形状を有するものであってもよいし、鋭角に尖ったものであってもよい。 (4) Modification D
In the above description, the first convex portion 441 projecting in the X-axis direction has a corner at the tip as shown in FIG. 4A, and the second convex portion 442 projecting in the X-axis direction is shown in FIG. Although it is a convex part with few corners as shown in FIG. 6, it is not restricted to this. Each convex part may include a corner with an edge, may have a smooth curved shape, or may have a sharp edge.
　以上のように、本発明は実施形態を用いて説明されたが、本発明の技術的範囲は上記の実施形態に記載の範囲に限定されない。多様な変更または改良を上記の実施形態に加えることが可能であることは、当業者に明らかである。その様な変更または改良を加えた形態も本発明の技術的範囲に含まれ得ることは、特許請求の範囲の記載から明らかである。 As described above, the present invention has been described using the embodiment, but the technical scope of the present invention is not limited to the scope described in the above embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above embodiments. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.
４００　熱交換器
４１１　フィン
４１２　扁平管
４２２　切欠縁部
４４０　凸部 400 heat exchanger 411 fin 412 flat tube 422 notched edge 440 convex

Claims (9)

  1. 　積層された複数のフィン（４１１）と、
    　前記複数のフィンの積層方向に対して交差する交差方向に並んで配置された複数の扁平管（４１２）と、
    を備え、
    　前記複数のフィンのそれぞれは、
    前記複数の扁平管のそれぞれと接合された複数の挿入口縁部（４２２）
    を有し、
    　前記複数のフィンのうち少なくとも１つのフィンは、
    前記積層方向に突出し、かつ、前記複数の挿入口縁部への前記複数の扁平管の接合時に変形する、少なくとも１つの凸部（４４０）
    を有している、
    熱交換器。     A plurality of laminated fins (411);
    A plurality of flat tubes (412) arranged side by side in the intersecting direction intersecting the stacking direction of the plurality of fins;
    With
    Each of the plurality of fins is
    A plurality of insertion port edges (422) joined to each of the plurality of flat tubes
    Have
    At least one of the plurality of fins is
    At least one convex portion (440) protruding in the stacking direction and deformed when the plurality of flat tubes are joined to the plurality of insertion port edges.
    have,
    Heat exchanger.
  2. 　前記少なくとも１つのフィンは、少なくとも１つの挿入口縁部から、前記積層方向と前記交差方向とを含む平面に直交する直交方向に離れた位置に、前記凸部を有する、
    請求項１に記載の熱交換器。     The at least one fin has the convex portion at a position away from at least one insertion port edge portion in an orthogonal direction orthogonal to a plane including the stacking direction and the intersecting direction.
    The heat exchanger according to claim 1.
  3. 　前記少なくとも１つのフィンは、複数の前記凸部を有し、
    　前記複数の前記凸部は、前記複数の挿入口縁部のそれぞれから、前記直交方向に離れた位置に、形成されている、
    請求項２に記載の熱交換器。     The at least one fin has a plurality of the convex portions,
    The plurality of convex portions are formed at positions away from each of the plurality of insertion port edge portions in the orthogonal direction.
    The heat exchanger according to claim 2.
  4. 　前記複数のフィンのそれぞれは、前記複数の前記凸部を有し、
    　前記複数のフィンのそれぞれにおける、前記複数の前記凸部は、前記複数の挿入口縁部のそれぞれから、前記直交方向に離れた位置に、形成されている、
    請求項３に記載の熱交換器。     Each of the plurality of fins has the plurality of convex portions,
    In each of the plurality of fins, the plurality of convex portions are formed at positions away from each of the plurality of insertion port edge portions in the orthogonal direction.
    The heat exchanger according to claim 3.
  5. 　前記少なくとも１つのフィンは、少なくとも１つの挿入口縁部と、前記少なくとも１つの挿入口縁部に隣接する挿入口縁部との間に、前記凸部を有する、
    請求項１から請求項４のいずれか１項に記載の熱交換器。     The at least one fin has the convex portion between at least one insertion opening edge and an insertion opening edge adjacent to the at least one insertion opening edge.
    The heat exchanger according to any one of claims 1 to 4.
  6. 　前記少なくとも１つのフィンは、複数の前記凸部を有し、
    　前記複数の前記凸部は、前記複数の挿入口縁部の、隣接する２つの挿入口縁部の間のそれぞれに、形成されている、
    請求項５に記載の熱交換器。     The at least one fin has a plurality of the convex portions,
    The plurality of convex portions are formed on each of the plurality of insertion opening edge portions between two adjacent insertion opening edge portions,
    The heat exchanger according to claim 5.
  7. 　前記複数のフィンのそれぞれは、前記複数の前記凸部を有し、
    　前記複数のフィンのそれぞれにおける、前記複数の前記凸部は、前記複数の挿入口縁部の、隣接する２つの挿入口縁部の間のそれぞれに、形成されている、
    請求項６に記載の熱交換器。     Each of the plurality of fins has the plurality of convex portions,
    In each of the plurality of fins, the plurality of convex portions are formed in each of the plurality of insertion opening edge portions between two adjacent insertion opening edge portions,
    The heat exchanger according to claim 6.
  8. 　それぞれ複数の挿入口縁部（４２２）を有し、少なくとも１つのフィン（４１１）が少なくとも１つの凸部（４４０）を有する、複数のフィン（４１１）、を積層する第１工程と、
    　前記複数のフィン（４１１）の積層方向に対して交差する交差方向に並んで配置された複数の扁平管（４１２）を、前記フィン（４１１）の前記挿入口縁部（４２２）に接合させる第２工程と、
    を備え、
    　前記第２工程において、前記フィン（４１１）の前記凸部（４４０）が前記積層方向に突出しており、前記扁平管（４１２）が前記フィン（４１１）の前記挿入口縁部（４２２）に接合するときに、前記フィン（４１１）の前記凸部（４４０）が変形する、
    熱交換器の製造方法。     A first step of laminating a plurality of fins (411), each having a plurality of insertion port edges (422) and at least one fin (411) having at least one protrusion (440);
    A plurality of flat tubes (412) arranged side by side in a crossing direction intersecting the stacking direction of the plurality of fins (411) are joined to the insertion port edge (422) of the fin (411). Two steps,
    With
    In the second step, the projection (440) of the fin (411) protrudes in the stacking direction, and the flat tube (412) is joined to the insertion port edge (422) of the fin (411). The convex portion (440) of the fin (411) is deformed,
    Manufacturing method of heat exchanger.
  9. 　前記第２工程において、
    前記扁平管（４１２）が前記フィン（４１１）の挿入口（４２１）に圧入されることによって、前記扁平管（４１２）が前記フィン（４１１）の前記挿入口縁部（４２２）に接合し、
    前記扁平管（４１２）が前記フィン（４１１）の前記挿入口縁部（４２２）に接合するときに、前記フィン（４１１）の前記凸部（４４０）が広げられる、
    請求項８に記載の熱交換器の製造方法。     In the second step,
    When the flat tube (412) is press-fitted into the insertion port (421) of the fin (411), the flat tube (412) is joined to the insertion port edge (422) of the fin (411),
    When the flat tube (412) is joined to the insertion port edge (422) of the fin (411), the convex portion (440) of the fin (411) is expanded.
    The manufacturing method of the heat exchanger of Claim 8.
PCT/JP2016/075428 2015-09-04 2016-08-31 Heat exchanger and method for producing heat exchanger WO2017038857A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4858434A (en) * 1971-11-22 1973-08-16
JPS57139085U (en) * 1981-02-17 1982-08-31
JPH0587480A (en) * 1991-09-27 1993-04-06 Showa Alum Corp Heat exchanger
JP2011202820A (en) * 2010-03-24 2011-10-13 Mitsubishi Electric Corp Fin for heat exchanger and the heat exchanger
JP2014228236A (en) * 2013-05-24 2014-12-08 三菱電機株式会社 Flat tube heat exchanger, air conditioner outdoor unit including flat tube heat exchanger, and method of manufacturing flat tube heat exchanger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4858434A (en) * 1971-11-22 1973-08-16
JPS57139085U (en) * 1981-02-17 1982-08-31
JPH0587480A (en) * 1991-09-27 1993-04-06 Showa Alum Corp Heat exchanger
JP2011202820A (en) * 2010-03-24 2011-10-13 Mitsubishi Electric Corp Fin for heat exchanger and the heat exchanger
JP2014228236A (en) * 2013-05-24 2014-12-08 三菱電機株式会社 Flat tube heat exchanger, air conditioner outdoor unit including flat tube heat exchanger, and method of manufacturing flat tube heat exchanger

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