WO1998015794A1 - Heat exchanger and method of manufacturing same - Google Patents

Heat exchanger and method of manufacturing same Download PDF

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Publication number
WO1998015794A1
WO1998015794A1 PCT/JP1997/003589 JP9703589W WO9815794A1 WO 1998015794 A1 WO1998015794 A1 WO 1998015794A1 JP 9703589 W JP9703589 W JP 9703589W WO 9815794 A1 WO9815794 A1 WO 9815794A1
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WO
WIPO (PCT)
Prior art keywords
tube
tube element
heat exchanger
bead
lamination
Prior art date
Application number
PCT/JP1997/003589
Other languages
French (fr)
Japanese (ja)
Inventor
Soichi Kato
Shoji Akiyama
Original Assignee
Zexel Corporation
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 Zexel Corporation filed Critical Zexel Corporation
Priority to EP97942272A priority Critical patent/EP0866301A4/en
Priority to KR1019980704154A priority patent/KR19990071870A/en
Publication of WO1998015794A1 publication Critical patent/WO1998015794A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0391—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 plate-like or laminated conduits a single plate being bent to form one or more conduits
    • 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
    • F28D1/0535—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 the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05375—Assemblies of conduits connected to common headers, e.g. core type radiators with particular pattern of flow, e.g. change of flow direction

Definitions

  • the present invention relates to a heat exchanger in which tubes are stacked in parallel with fins interposed therebetween and a method for manufacturing the same.
  • tubes are stacked with fins interposed, the ends of each tube are connected to a distribution collecting member such as a header pipe, and a heat exchange medium is provided between the inlet and outlet joints provided on the distribution collecting member.
  • tubes of the stacked heat exchanger those having a plurality of flow paths therein are used in order to improve the heat exchange rate and the pressure resistance.
  • tubes of heat exchangers used as condensers are required to have excellent heat exchange rate and pressure resistance.
  • Examples of this type of tube include a bead type that separates the internal flow path of the tube by using a circular or elongated bead that protrudes from the flat portion into the tube.
  • a bead type that separates the internal flow path of the tube by using a circular or elongated bead that protrudes from the flat portion into the tube.
  • an inner fin type in which an inner fin having a corrugated cross section is passed through a tube tube, the tube is pressed, and the inner fin is clamped to the inner wall of the flow path, thereby dividing the inner flow path into a plurality of sections.
  • the bead type is the inner fin type
  • a separate inner fin is not required, and the number of components is small, so that the step of inserting the inner fin and the step of pressing the tube for clamping the inner fin to the inner wall of the flow path are omitted.
  • This has the advantage that the manufacturing cost is low. Also, depending on the arrangement and shape of the beads, it is possible to increase the heat exchange rate by causing turbulence in the heat exchange medium flowing through the tubes.
  • These tubes are formed, for example, by bending or laminating a plate made of aluminum or aluminum alloy with a wall thickness of about 0.4 mm to form a tube with a width of 16 to 20 mm. Is done.
  • FIG. 5 is a cross-sectional perspective view of a conventional tube.
  • the tube 13 has a single long plate-like plate formed to a predetermined dimension, and the center in the width direction of the plate is formed into a predetermined roundness. It is formed by bending at the radius.
  • the plate is provided with a flat joint portion 20 and a long groove-shaped bead 21 on both edges in the plate width direction in advance by roll forming or press forming. It is formed in a flat shape by being bent at the central bent portion 22 so that the joint portions 20 abut each other.
  • FIG. 6 is a cross-sectional perspective view of a conventional tube 13 formed by stacking two plates.
  • the tube 13 is formed by providing a joining portion 20 and a bead 21 on two plates, respectively, and joining the joining portions 20 and 20 so as to abut each other.
  • the distance between the outer walls (thickness of the tube 13) of the flat portions 23, 23 facing each other is uniformly set to a predetermined thickness (for example, width 16 to 2) corresponding to the fins and the header pipe. O mm and a thickness of about 1.7 mm).
  • the joints 20 and the top of the bead 21 and the inner wall of the flow path 24 facing the joint need to be joined by brazing. Therefore, tubes are stacked with fins interposed between them, and the flat portion 23 has fins.
  • the contact state or the state close to the molten brazing material from the surface of the plate at the time of brazing until it is embedded is maintained.
  • a jig or the like for pressing the tube layer with the fins interposed therebetween from both sides is used.
  • the bead 21 has a top portion that abuts the inside of the flat portion 23 that is an inner wall portion of the flow path 24, and also has a top portion protruding from another bead provided at the opposing portion. In some cases, they are matched.
  • the tubes 13 thus formed are laminated with fins interposed therebetween, and their ends are connected to a distribution collective member such as a header pipe.
  • the assembled body (A ss y) including the tube 13, the distribution collecting member, and the fins is subjected to a heat treatment and brazed integrally.
  • the brazing material Prior to this heat treatment, the brazing material is clad at each required location. Normally, the plate that forms the tube is previously clad with brazing material over the entire front and back surfaces.
  • each part such as the height of the joint and the height of the bead
  • the engagement of each tube may slightly shift due to the assembly with the distributing / collecting members and fins.
  • the top of the bead and the inner wall of the flow path are slightly separated from each other, and a portion where brazing material cannot be sufficiently obtained occurs between them.
  • the present invention provides a pressing force from the fins to the flat portion at the time of assembling, so that the butt between the top of the bead and the inner wall portion facing this top is appropriately corrected to a brazable state, It is an object of the present invention to provide a heat exchanger capable of reducing brazing defects and a method for manufacturing the same. Disclosure of the invention
  • the present invention relates to a tube element formed by bending a single plate or a tube element formed by overlapping two plates.
  • a heat exchanger in which tube elements in which beads for partitioning into a plurality of flow paths are integrally formed are laminated in parallel via fins, the thickness of the intermediate part of the tube elements before lamination is reduced.
  • the heat exchanger is formed so as to be thicker than the middle portion of the tube surface of the tube element after the lamination.
  • the tube element before lamination has a shape in which the middle part of the upper and lower tube surfaces is bulged toward the respective fin side, and the tube element before lamination is
  • This is a heat exchanger in which the middle part of one of the tube surfaces is formed to protrude toward the fin.
  • the present invention is a tube element formed by bending one plate or a tube element formed by overlapping two plates, wherein a bead for dividing into a plurality of flow paths is integrally formed therein.
  • the intermediate portion of the tube elements before stacking is formed in a shape which is bulged in advance to the fin side, and thereafter, By stacking these tube elements via fins, the tube elements are compressed to form an assembly of a heat exchanger, the flux is applied and sent into the furnace, and the heat is applied to braze them together by heat treatment. It is a manufacturing method of the exchanger.
  • the bulged portion is appropriately compressed by the pressure contact of the fins, and the top portions of the tubes or the bead and the inner wall portion of the tube can be brazed. Is corrected.
  • FIG. 2 is a schematic front view of a heat exchanger according to a specific example of the present invention.
  • FIG. 3 is a partially broken perspective view showing the tube of the present example.
  • FIG. 4 is a partially broken perspective view showing a state in which the tube of this example is temporarily assembled.
  • FIG. 4 is a partially broken perspective view showing a split plate type tube according to another embodiment of the present invention.
  • FIG. 7 is a partially cutaway perspective view showing a single-plate type tube according to a conventional example.
  • FIG. 6 is a partially cutaway perspective view showing a split plate type tube according to a conventional example.
  • FIG. 1 shows a front view of the heat exchanger of this embodiment.
  • a plurality of tubes 2, 2 and corrugated fins 3, 3 are stacked in parallel and alternately with each other. Ends of the flat tube 2 These are inserted into and connected to the tube insertion holes 5, 5 of the header pipe 4 erected on the left and right, respectively.
  • side plate connection holes 6 are provided in the header pipes 4 on the upper end side and the lower end side of the laminated tubes 2, and these side plate connection holes 6 have side plate U-shaped cross sections. 7 are inserted and joined at both ends. Further, the upper and lower end openings of the header pipe 4 are closed by caps 8.
  • an inlet joint 9 is connected to one header pipe 4, and an outlet joint 10 is connected to the other header pipe 4.
  • a slit 11 having a predetermined shape is formed at a required portion of both header pipes 4, and a partition plate 12 that partitions the header pipe 4 in the longitudinal direction is inserted and arranged from the slit 11. ing.
  • the heat exchange medium flows between the inlet joint 9 and the outlet joint 10 in a meandering manner a plurality of times. That is, the heat exchange medium supplied to the inlet joint 9 of the heat exchanger 1 is meandered a plurality of times through the tube 2 between the left and right header pipes 4, 4. When passing, it exchanges heat with the outside and is discharged from the outlet joint 10.
  • the tube 2 is formed by bending a single plate provided with a joint portion 20 and a bead 21 by roll forming at a central bent portion 22 in the plate width direction.
  • joints 20 having flat portions are provided. As in the conventional case, the joints 20 and 20 increase the joint area to ensure sufficient brazing joint strength. I can do it.
  • a bead 21 having a predetermined height is formed over the entire length in the longitudinal direction.
  • the beads 21 are provided at predetermined positions in the width direction of the tube 2 alternately in the tube inward direction from the inner surface of the tube 2, and are provided in two rows in this example, and three beads are provided in the tube 2.
  • Roads 24 and 24 are formed. That is, the protruding height of these beads 21 is set substantially equal to the inner width of the tube of tube 2, and the portion of tube 2 facing these beads 21 is formed in a plane. Therefore, the tube 2 and the inner surface of the tube facing the top of each bead are joined to form a plurality of channels 24, 24 in the tube 2, and the channels 24, 24 flow through these channels.
  • the portion forming this flow path serves as a reinforcing member, improving the pressure resistance to the pressure exerted by the heat exchange medium.
  • the flat portion 23 of the tube 2 is formed in a gently convex shape with the bent portion 22 bent along with the both sides in the longitudinal direction and the top near the center in the width direction. Slightly swells to the fin 3 side to be interposed.
  • the flat portion 23 at the portion where the bead 21 is provided and at the portion corresponding to the inner wall portion of the channel 24 facing the top of the bead 21 bulges toward the fin 3 side.
  • such a tube 2 is laminated with fins 3 interposed on its upper and lower surfaces, and the flat portion 23 of the tube 2 has a fin 3
  • the pressing force from 3 is applied. That is, the fins 3 are formed in a wavy shape meandering up and down using a thin metal material having excellent heat conductivity.
  • the meandering height of the fins 3 is set to the height reaching the non-bulging portion of the tubes to be stacked, as in the conventional case.
  • the height of the fins 3 is set as described above, and the flat portion 23 of the tube 2 is bulged to the fins 3 side. Since the pressing force is supplied, the bulged portion of the flat portion 23 is pressed, that is, the tube 2 is compressed so that the upper and lower thicknesses become approximately the thickness b to the thickness a. Become.
  • the upper and lower flat portions 23 are pressed and deformed, and the tube 2 itself is appropriately deformed. Since they are compressed from above and below, they come closer to each other and are corrected to a state of contact or closer. In other words, at least the upper and lower portions of each bead are bulged in the vertical direction, so that the upper and lower flat portions 23 are pressed and deformed, and at the same time the inner wall portion facing the bead 21 approaches the bead side, The bead 21 itself also approaches the opposing inner wall. Therefore, even if the corresponding dimensions of each part are varied or the bite of each part is displaced due to the assembling condition, the top of the bead 21 and the flow path 24 A gap can be prevented from being formed between them.
  • the fin 3 is attached to the tube 2 by slightly deforming its waveform even if the flat portion 23 is not pressed and deformed to a perfect plane.
  • the end of the tube 2 is inserted into the inlet hole 5 of the header pipe 4, and the assembly is fed into a furnace after being coated with a flux, and is brazed by heat treatment.
  • the joining portions 20 and 20 and the top of the bead 21 and the flat portion 23 are brazed and joined in a state where a sufficient amount of molten brazing material is obtained.
  • the beads are alternately protruded from the inner surfaces of the upper and lower flat portions provided in the tube.
  • the beads may be provided on one surface, and The beads may be projected from both inner surfaces so that the tops of the beads come into contact with each other.
  • the flat portion may be configured to bulge only one of the upper and lower surfaces of the tube, or to bulge only a necessary portion near the bead.
  • the tube is formed in a shape that bulges up and down with the vicinity of the center of the tube as the vertex, the bulge is appropriately compressed and deformed by the pressing force from the fin, and
  • the top of the bead and the part of the inner wall facing the bead form an optimal connection for brazing. It can be corrected to a near-contact state, and the brazing property of the portion can be surely improved.
  • each part such as the height of the joint and the height of the bead may vary slightly, or the bite of each tube may shift slightly due to the degree of assembly with the distribution assembly member ⁇ fin. Even when the top of the bead and the inner wall of the flow path are slightly separated from each other, it is possible to correct the approach / contact state optimal for brazing.
  • the brazing property of the bead is improved, so that the yield can be improved, the heat exchange rate and the pressure resistance can be enhanced, and further, it can be applied to various laminated heat exchangers such as capacitors. .
  • the present invention relates to a heat exchanger in which tubes are stacked in parallel with fins interposed therebetween and a method of manufacturing the same, and particularly to an improvement in brazing performance of a tube provided with a bead for dividing the inside into a plurality of flow paths. It is intended . Therefore, it is applied to a general radiator-evaporator and a capacitor requiring withstand voltage.

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

Abstract

A heat exchanger (1) formed by laminating tube elements (2) in parallel manner with fins (3) therebetween, the tube elements being formed by folding a single plate or by overlapping two plates and formed integral therein with beads (21), which compartment an interior of the tube element into a plurality of flow passages (24), an intermediate portion of the tube elements having a greater thickness (b) before such lamination than a thickness (a) of an intermediate portion on a tube surface of the tube elements after such lamination. A method of manufacturing a heat exchanger, according to the invention, comprises beforehand forming an intermediate portion of the tube elements (2) prior to lamination into a configuration, in which it expands toward the fins, then laminating these tube elements one upon another with the fins therebetween to compress the tube elements to form an assembly of a heat exchanger, applying flux on the assembly, and feeding the assembly into a furnace to subject it to integral brazing by heat treatment. Accordingly, the expanded portion is suitably compressed by pressure welding of the fins at the time of lamination of the tube elements such that top portions of the tube elements or the beads and inner wall portions of the tube elements are corrected to permit brazing.

Description

明糸田書  Akitoda
熱交換器及びその製造方法 技術分野  Heat exchanger and method for manufacturing the same
本発明は、 フィンを介装してチューブが平行に積層される熱交 換器とその製造方法に関する。 背景技術  The present invention relates to a heat exchanger in which tubes are stacked in parallel with fins interposed therebetween and a method for manufacturing the same. Background art
従来、 チューブがフィンを介装して積層されるとともに、 各チ ユーブの端部がへッダパイプ等の分配集合部材にそれぞれ接続さ れ、 熱交換媒体が分配集合部材に設けられた出入口継手間で複数 回蛇行して流通される積層型熱交換器が知られている。  Conventionally, tubes are stacked with fins interposed, the ends of each tube are connected to a distribution collecting member such as a header pipe, and a heat exchange medium is provided between the inlet and outlet joints provided on the distribution collecting member. 2. Description of the Related Art A laminated heat exchanger that is meandered and distributed several times is known.
この積層型熱交換器のチューブは、 熱交換率や耐圧性を向上さ せるために、 内部に複数の流路を有するものが用いられている。 特に、 コンデンサとして用いられる熱交換器のチューブは、 優れ た熱交換率と耐圧性とが求められている。  As the tubes of the stacked heat exchanger, those having a plurality of flow paths therein are used in order to improve the heat exchange rate and the pressure resistance. In particular, tubes of heat exchangers used as condensers are required to have excellent heat exchange rate and pressure resistance.
この種のチューブとしては、 偏平部から管内に突出して設けた 円状や細長状のビードにより、 チューブの内部流路を区切るビー ドタイプのものや、 例えば実開平 5— 5 2 5 6 5号に開示されて いるように、 チューブ管内に、 断面形状が波状のインナーフィン を揷通して、 チューブを押圧し、 インナーフィンを流路の内壁に 挾持させて、 内部流路を複数に区切るインナーフィンタイプのも のが提案されている。  Examples of this type of tube include a bead type that separates the internal flow path of the tube by using a circular or elongated bead that protrudes from the flat portion into the tube. As disclosed, an inner fin type in which an inner fin having a corrugated cross section is passed through a tube tube, the tube is pressed, and the inner fin is clamped to the inner wall of the flow path, thereby dividing the inner flow path into a plurality of sections. Some have been proposed.
とりわけ、 ビードタイプのものは、 インナーフィンタイプのも のと比較して、 別体のインナーフィンが不要で構成部品の点数が 少なく、 従ってインナーフィンを挿入する工程やインナーフィン を流路の内壁に挾持させるためのチューブ押圧工程等が省略され るため、 製造コス トが廉価となる利点を有する。 また、 ビードの 配列や形状により、 チューブを流通する熱交換媒体に乱流を起こ して、 熱交換率を高めることも可能である。 In particular, the bead type is the inner fin type In comparison with the above, a separate inner fin is not required, and the number of components is small, so that the step of inserting the inner fin and the step of pressing the tube for clamping the inner fin to the inner wall of the flow path are omitted. This has the advantage that the manufacturing cost is low. Also, depending on the arrangement and shape of the beads, it is possible to increase the heat exchange rate by causing turbulence in the heat exchange medium flowing through the tubes.
これらのチューブは、 例えば、 肉厚 0 . 4 mm程度のアルミ二 ゥム材又はアルミニウム合金材からなるプレートを、 折り曲げた り、 二枚重ね合わせたりして、 幅 1 6〜 2 O mmのものが形成さ れる。  These tubes are formed, for example, by bending or laminating a plate made of aluminum or aluminum alloy with a wall thickness of about 0.4 mm to form a tube with a width of 16 to 20 mm. Is done.
図 5に示すものは、 従来チューブの断面斜視図であり、 このチ ユーブ 1 3は、 所定寸法に形成された長板状の単一プレートを、 そのプレートの幅方向の中央を、 所定の丸み半径で折り曲げて、 形成されている。 また、 このプレートには、 予めプレート幅方向 の両縁に、 平面状の接合部 2 0と、 長溝状のビード 2 1とをロー ル成形又はプレス成形により設けられており、 更にこのプレート を、 接合部 2 0同士を突き合せるように中央の折曲部 2 2で折り 曲げて偏平状に形成されたものである。  FIG. 5 is a cross-sectional perspective view of a conventional tube. The tube 13 has a single long plate-like plate formed to a predetermined dimension, and the center in the width direction of the plate is formed into a predetermined roundness. It is formed by bending at the radius. In addition, the plate is provided with a flat joint portion 20 and a long groove-shaped bead 21 on both edges in the plate width direction in advance by roll forming or press forming. It is formed in a flat shape by being bent at the central bent portion 22 so that the joint portions 20 abut each other.
更に、 図 6に示すのは、 二枚のプレートを重ね合わせて形成し た従来チューブ 1 3の断面斜視図である。 このチューブ 1 3は、 二枚のプレートにそれぞれ接合部 2 0とビード 2 1とを設け、 接 合部 2 0， 2 0同士を互いに突き合せるように重ね合わせて形成 したものである。  Further, FIG. 6 is a cross-sectional perspective view of a conventional tube 13 formed by stacking two plates. The tube 13 is formed by providing a joining portion 20 and a bead 21 on two plates, respectively, and joining the joining portions 20 and 20 so as to abut each other.
これらは、 いずれも幅方向が厚さ方向よりも長い偏平状に形成 され、 その向い合う両側の偏平部 2 3， 2 3の外壁間隔 （チュー ブ 1 3の厚さ） を、 一律に、 フィン及びヘッダパイプと対応する 所定の厚さ （例えば、 幅 1 6〜2 O mmのもので厚さが 1 . 7 m m程度） に形成されている。 These are all formed in a flat shape with the width direction longer than the thickness direction. The distance between the outer walls (thickness of the tube 13) of the flat portions 23, 23 facing each other is uniformly set to a predetermined thickness (for example, width 16 to 2) corresponding to the fins and the header pipe. O mm and a thickness of about 1.7 mm).
接合部 2 0同士及びビード 2 1の頂部とこれに対向する流路 2 4の内壁部分は、 ろう付けにより接合する必要から、 フィンを介 装してチューブを積層し、 偏平部 2 3がフィンと圧接することに よって、 当接した状態、 又は、 ろう付け時にプレートの表面から 溶融したろう材が埋入するまでに近接した状態、 に維持される。 この際には、 必要に応じて、 フィンを介装したチューブの層を両 側より加圧する治具等が用いられる。 尚、 ビード 2 1は、 図示の ように、 その頂部を流路 2 4の内壁部分たる偏平部 2 3の内側と 突き合せる態様のほかに、 対向部位に設けた別のビードと互いに 頂部を突き合せるようにする場合もある。  The joints 20 and the top of the bead 21 and the inner wall of the flow path 24 facing the joint need to be joined by brazing. Therefore, tubes are stacked with fins interposed between them, and the flat portion 23 has fins. By pressing against, the contact state or the state close to the molten brazing material from the surface of the plate at the time of brazing until it is embedded is maintained. In this case, if necessary, a jig or the like for pressing the tube layer with the fins interposed therebetween from both sides is used. As shown in the drawing, the bead 21 has a top portion that abuts the inside of the flat portion 23 that is an inner wall portion of the flow path 24, and also has a top portion protruding from another bead provided at the opposing portion. In some cases, they are matched.
このようにして形成されたチューブ 1 3は、 フィンを介装して 積層されるとともに、 その端部をヘッダパイプ等の分配集合部材 に連結される。  The tubes 13 thus formed are laminated with fins interposed therebetween, and their ends are connected to a distribution collective member such as a header pipe.
そして、 チューブ 1 3と分配集合部材とフィンとからなるこの 組み付け体 （A s s y ) は、 加熱処理が施され、 一体ろう付けさ れる。 尚、 ろう材はこの加熱処理に先立って所要の各箇処にクラ ッドされる。 通常、 チューブを形成するプレートは、 予めろう材 が表裏全面にクラッドされている。  Then, the assembled body (A ss y) including the tube 13, the distribution collecting member, and the fins is subjected to a heat treatment and brazed integrally. Prior to this heat treatment, the brazing material is clad at each required location. Normally, the plate that forms the tube is previously clad with brazing material over the entire front and back surfaces.
ところが、 前述したようなチューブが用いられた積層熱交換器 の一体ろう付けにおいては、 ビードの頂部と流路の内壁部分とが 、 部分的にろう付け不良となり、 熱交換率の低下や耐圧欠陥等の 原因となる問題があった。 However, in the integrated brazing of a laminated heat exchanger using tubes as described above, the top of the bead and the inner wall of the flow path are not connected. However, there was a problem that a brazing failure was partially caused, resulting in a decrease in a heat exchange rate, a pressure resistance defect, and the like.
これは、 接合部の高さやビードの高さを始めとする各部の対応 寸法に多少のバラツキがあったり、 分配集合部材ゃフィンとの組 み付け具合で各チューブの咬み合いが僅かにずれたりして、 ビー ドの頂部と流路の内壁部分とが微妙に離れ、 その間ににろう材を 十分に得ることができない個所が生じるためである。  This is because the corresponding dimensions of each part, such as the height of the joint and the height of the bead, may vary slightly, and the engagement of each tube may slightly shift due to the assembly with the distributing / collecting members and fins. As a result, the top of the bead and the inner wall of the flow path are slightly separated from each other, and a portion where brazing material cannot be sufficiently obtained occurs between them.
この場合、 接合部同士は、 その間にプレートの外面から溶融し たろぅ材も侵入するため、 比較的良好なろう付けが可能であるが 、 ビードの頂部と流路の内壁部分とは、 その間にプレートの内面 から溶融したろぅ材しか侵入しないので、 僅かでも離れ気味にな ると顕著にろう付け不良を生じる。  In this case, a relatively good brazing is possible because the molten filter material intrudes from the outer surface of the plate between the joints, but the top of the bead and the inner wall portion of the flow path are interposed between them. Since only the melted filter material enters from the inner surface of the plate, even a slight separation will cause remarkable brazing failure.
従って、 このようなチューブは、 歩留が劣るため性能の信頼性 に乏しく、 コンデンサに用いるにも満足な熱交換率と耐圧性とが 得られないという不都合もあった。  Therefore, such a tube has poor reliability in performance due to inferior yield, and there is also a disadvantage that a satisfactory heat exchange rate and pressure resistance cannot be obtained even when used for a capacitor.
そこで、 本発明は、 組み付け時に、 フィンから偏平部への押圧 力を供給することにより、 ビードの頂部と、 この頂部に対向する 内壁部分との突き合せをろう付け可能な状態に適宜矯正し、 ろう 付け不良の低減が可能な熱交換器とその製造方法を提供すること を目的としている。 発明の開示  Therefore, the present invention provides a pressing force from the fins to the flat portion at the time of assembling, so that the butt between the top of the bead and the inner wall portion facing this top is appropriately corrected to a brazable state, It is an object of the present invention to provide a heat exchanger capable of reducing brazing defects and a method for manufacturing the same. Disclosure of the invention
本発明は、 一枚のプレートを折り曲げて形成したチューブエレ メント又は二枚のプレートを重ね合わせて形成したチューブエレ メントであって、 内部に複数の流路に区切るビードが一体に形成 されたチューブエレメントを、 フィンを介して平行に積層した熱 交換器において、 積層する前のチューブエレメントの中間部の厚 さが、 積層後におけるチューブエレメントのチューブ面の中間部 の厚さよりも大きく形成されている熱交換器である。 The present invention relates to a tube element formed by bending a single plate or a tube element formed by overlapping two plates. In a heat exchanger in which tube elements in which beads for partitioning into a plurality of flow paths are integrally formed are laminated in parallel via fins, the thickness of the intermediate part of the tube elements before lamination is reduced. The heat exchanger is formed so as to be thicker than the middle portion of the tube surface of the tube element after the lamination.
この熱交換器において、 積層する前のチューブエレメントは、 その上下双方のチューブ面の中間部がそれぞれのフィン側へ膨出 した形状に形成されていたり、 また、 積層する前のチューブエレ メントは、 その一方のチューブ面の中間部がフィン側へ膨出した 形状に形成されている熱交換器である。  In this heat exchanger, the tube element before lamination has a shape in which the middle part of the upper and lower tube surfaces is bulged toward the respective fin side, and the tube element before lamination is This is a heat exchanger in which the middle part of one of the tube surfaces is formed to protrude toward the fin.
また、 本発明は、 一枚のプレートを折り曲げて形成したチュー ブエレメント又は二枚のプレートを重ね合わせて形成したチュー ブエレメントであって、 内部に複数の流路に区切るビードが一体 に形成されたチューブエレメントを、 フィンを介して平行に積層 した熱交換器の製造方法において、 積層する前のチューブエレメ ントの中間部を予めフィン側へ膨出した形状に形成しておき、 そ の後、 これらのチューブエレメントをフィンを介して積層するこ とにより該チューブエレメントを圧縮して熱交換器の組み立て体 を形成し、 フラックスを塗布して炉内に送り、 加熱処理により一 体ろう付けする熱交換器の製造方法である。  Further, the present invention is a tube element formed by bending one plate or a tube element formed by overlapping two plates, wherein a bead for dividing into a plurality of flow paths is integrally formed therein. In the method for manufacturing a heat exchanger in which the tube elements are stacked in parallel via fins, the intermediate portion of the tube elements before stacking is formed in a shape which is bulged in advance to the fin side, and thereafter, By stacking these tube elements via fins, the tube elements are compressed to form an assembly of a heat exchanger, the flux is applied and sent into the furnace, and the heat is applied to braze them together by heat treatment. It is a manufacturing method of the exchanger.
従って、 本発明によれば、 チューブを積層する際に、 フィンの 圧接によって、 前記膨出した部分が適宜圧縮され、 チューブの頂 部同士或いはビードとチューブの内壁部分とが、 ろう付け可能な 状態に矯正される。 図面の簡単な説明 Therefore, according to the present invention, when the tubes are stacked, the bulged portion is appropriately compressed by the pressure contact of the fins, and the top portions of the tubes or the bead and the inner wall portion of the tube can be brazed. Is corrected. BRIEF DESCRIPTION OF THE FIGURES
【図 1】  【Figure 1】
本発明の具体例に係り、 熱交換器の概略正面図である。  FIG. 2 is a schematic front view of a heat exchanger according to a specific example of the present invention.
【図 2】  【Figure 2】
本例のチューブを示す一部破断した斜視図である。  FIG. 3 is a partially broken perspective view showing the tube of the present example.
【図 3】  [Figure 3]
本例のチューブを仮組みした状態を示す一部破断した斜視図で め  FIG. 4 is a partially broken perspective view showing a state in which the tube of this example is temporarily assembled.
【図 4】  [Fig. 4]
本発明の他の具体例に係り、 分割プレートタイプのチューブを 示す一部破断した斜視図である。  FIG. 4 is a partially broken perspective view showing a split plate type tube according to another embodiment of the present invention.
【図 5】  [Figure 5]
従来例に係り、 一枚プレートタイプのチューブを示す一部破断 した斜視図である。  FIG. 7 is a partially cutaway perspective view showing a single-plate type tube according to a conventional example.
【図 6】  [Fig. 6]
従来例に係り、 分割プレートタイプのチューブを示す一部破断 した斜視図である。 発明を実施するための最良の形態  FIG. 6 is a partially cutaway perspective view showing a split plate type tube according to a conventional example. BEST MODE FOR CARRYING OUT THE INVENTION
以下に、 本発明を図示の具体例に基づいて詳細に説明する。 図 1は本具体例の熱交換器の正面図を示すもので、 この熱交換 器 1は、 複数のチューブ 2， 2と波状フィン 3， 3が、 互いに平 行に且つ交互に積層され、 積層された偏平チューブ 2の両端が、 それぞれ、 左右に立設されたへッダパイプ 4のチューブ揷入孔 5 ， 5に揷入されて接続されている。 また、 積層されたチューブ 2 の上端側及び下端側のヘッダパイプ 4には、 サイ ドプレート接続 孔 6が設けられ、 これらのサイ ドプレート接続孔 6には、 横断面 コ字状のサイ ドプレート 7の両端部が挿入して接合されている。 更に、 ヘッダパイプ 4の上下端部開口は、 キャップ 8により閉塞 されている。 また更に、 一方のヘッダパイプ 4には入口継手 9が 接続され、 他方のヘッダパイプ 4には出口継手 1 0が接続されて いる。 また更に、 双方のヘッダパイプ 4の所要個所には、 所定形 状のスリット 1 1が形成され、 ヘッダパイプ 4を長手方向に区画 する仕切りプレート 1 2力 前記スリット 1 1から挿入されて配 設されている。 Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. FIG. 1 shows a front view of the heat exchanger of this embodiment. In this heat exchanger 1, a plurality of tubes 2, 2 and corrugated fins 3, 3 are stacked in parallel and alternately with each other. Ends of the flat tube 2 These are inserted into and connected to the tube insertion holes 5, 5 of the header pipe 4 erected on the left and right, respectively. In addition, side plate connection holes 6 are provided in the header pipes 4 on the upper end side and the lower end side of the laminated tubes 2, and these side plate connection holes 6 have side plate U-shaped cross sections. 7 are inserted and joined at both ends. Further, the upper and lower end openings of the header pipe 4 are closed by caps 8. Further, an inlet joint 9 is connected to one header pipe 4, and an outlet joint 10 is connected to the other header pipe 4. Further, a slit 11 having a predetermined shape is formed at a required portion of both header pipes 4, and a partition plate 12 that partitions the header pipe 4 in the longitudinal direction is inserted and arranged from the slit 11. ing.
そして、 このような熱交換器 1においては、 入口継手 9と出口 継手 1 0との間で熱交換媒体が複数回蛇行して通流される。 すな わち、 この熱交換器 1の入口継手 9に供給された熱交換媒体は、 左右のヘッダパイプ 4， 4間を、 チューブ 2を介して、 複数回に 蛇行通流され、 このチューブを通過する際に、 外部と熱交換を行 い、 出口継手 1 0から排出される。  In such a heat exchanger 1, the heat exchange medium flows between the inlet joint 9 and the outlet joint 10 in a meandering manner a plurality of times. That is, the heat exchange medium supplied to the inlet joint 9 of the heat exchanger 1 is meandered a plurality of times through the tube 2 between the left and right header pipes 4, 4. When passing, it exchanges heat with the outside and is discharged from the outlet joint 10.
図 2において、 チューブ 2は、 ロール成形によって接合部 2 0 とビード 2 1とを設けた一枚のプレートを、 プレート幅方向の中 央の折曲部 2 2で折り曲げて形成され、 接合部 2 0と折曲部 2 2 との間に、 後述する所定形状の偏平部 2 3が形成されている。 すなわち、 このチューブ 2は、 薄板状の熱伝導性及び成形性や ろう付け性が良好なアルミ製ブレージングシートを素材に用い、 その幅方向の両端には、 平面部を備えた接合部 2 0が設けられ、 従来と同様に、 この接合部 2 0 , 2 0により接合面積を拡大して 、 十分なろう付け接合強度を確保できるようにしている。 In FIG. 2, the tube 2 is formed by bending a single plate provided with a joint portion 20 and a bead 21 by roll forming at a central bent portion 22 in the plate width direction. A flat portion 23 having a predetermined shape, which will be described later, is formed between 0 and the bent portion 22. That is, the tube 2 is made of a thin aluminum brazing sheet having excellent heat conductivity, moldability, and brazing properties. At both ends in the width direction, joints 20 having flat portions are provided. As in the conventional case, the joints 20 and 20 increase the joint area to ensure sufficient brazing joint strength. I can do it.
また、 これらのチューブ 2には、 それぞれ、 少なくとも単体の チューブ 2に組み付ける前においては、 所定高さのビード 2 1が 、 その長手方向の全長に亘つて形成されている。  Further, in each of these tubes 2, at least before assembling to the single tube 2, a bead 21 having a predetermined height is formed over the entire length in the longitudinal direction.
このビード 2 1は、 チューブ 2の幅方向の所定個所に、 チュー ブ 2の内面から交互にチューブ内方向に突出されて、 本例の場合 2列設けられており、 チューブ 2内に 3つの流路 2 4， 2 4を形 成している。 すなわち、 これらのビード 2 1の突出高さは、 チュ ーブ 2の管内幅とほぼ等しく設定され、 これらのビード 2 1が対 向するチューブ 2の部位は、 平面に形成されている。 従って、 各 ビードの頂部と対面したチューブ 2と管内面が接合して、 チュー ブ 2内に、 複数の流路 2 4， 2 4が形成され、 これらの流路 2 4 ， 2 4を通流する媒体の熱交換効率を高めるとともに、 この流路 を形成する部分が補強部材として働き、 熱交換媒体によってもた らされる圧力に対する耐圧性を向上させている。  The beads 21 are provided at predetermined positions in the width direction of the tube 2 alternately in the tube inward direction from the inner surface of the tube 2, and are provided in two rows in this example, and three beads are provided in the tube 2. Roads 24 and 24 are formed. That is, the protruding height of these beads 21 is set substantially equal to the inner width of the tube of tube 2, and the portion of tube 2 facing these beads 21 is formed in a plane. Therefore, the tube 2 and the inner surface of the tube facing the top of each bead are joined to form a plurality of channels 24, 24 in the tube 2, and the channels 24, 24 flow through these channels. In addition to increasing the heat exchange efficiency of the heat exchange medium, the portion forming this flow path serves as a reinforcing member, improving the pressure resistance to the pressure exerted by the heat exchange medium.
また、 このチューブ 2の偏平部 2 3は、 折曲部 2 2の折り曲げ とともに、 両側をそれぞれ、 長手方向に亘つて、 幅方向の中央付 近を最頂とする緩やかな凸状に形成され、 介装するフィン 3側へ 若干膨出している。 本例のチューブ 2 (幅 1 6〜2 0 mm) の厚 さは、 図 2の二点鎖線が示すように、 縁端部近傍では厚さ a (例 えば 1 . 7 mm) とされ、 幅方向の中央近傍では厚さ aよりやや (例えば、 厚さ a = l . 7 mmに対して 0 . l mm〜0 . 2 m m 程度） 厚さを増した厚さ bとされている。 本例では、 前記ビード 2 1が設けられた個所及び内側がビード 2 1の頂部と対向する流 路 2 4の内壁部分に該当する個所における偏平部 2 3はフィン 3 側へ膨出している。 In addition, the flat portion 23 of the tube 2 is formed in a gently convex shape with the bent portion 22 bent along with the both sides in the longitudinal direction and the top near the center in the width direction. Slightly swells to the fin 3 side to be interposed. As shown by the two-dot chain line in Fig. 2, the thickness of the tube 2 (width 16 to 20 mm) in this example is set to the thickness a (for example, 1.7 mm) near the edge and the width In the vicinity of the center in the direction, the thickness is slightly larger than the thickness a (for example, 0.1 mm to 0.2 mm for the thickness a = 1.7 mm). Degree) The thickness b is increased. In this example, the flat portion 23 at the portion where the bead 21 is provided and at the portion corresponding to the inner wall portion of the channel 24 facing the top of the bead 21 bulges toward the fin 3 side.
そして、 このようなチューブ 2は、 図 3の一部破断した部分斜 視図に示すように、 その上下面にフィン 3を介装して積層され、 チューブ 2の偏平部 2 3には、 フィン 3からの押圧力が加えられ る。 すなわち、 このフィン 3は、 伝熱性に優れた薄板金属素材を 用いて、 上下に蛇行する波状に形成されている。 また、 このフィ ン 3が蛇行した高さ寸法は、 従来と同様に、 積層されるチューブ の非膨出部分に到達する高さ寸法に設定されている。  As shown in a partially cutaway perspective view of FIG. 3, such a tube 2 is laminated with fins 3 interposed on its upper and lower surfaces, and the flat portion 23 of the tube 2 has a fin 3 The pressing force from 3 is applied. That is, the fins 3 are formed in a wavy shape meandering up and down using a thin metal material having excellent heat conductivity. The meandering height of the fins 3 is set to the height reaching the non-bulging portion of the tubes to be stacked, as in the conventional case.
従って、 このようにフィン 3の高さ寸法が設定されているとと もに、 フィン 3側にチューブ 2の偏平部 2 3が膨出されているこ とにより、 積層組み付け時には、 このフィン 3から押圧力が供給 されるので、 偏平部 2 3の膨出した部分は押圧され、 つまり、 チ ユーブ 2の上下の厚さが、 およそ厚さ bから厚さ aになるように 圧縮されることになる。  Therefore, the height of the fins 3 is set as described above, and the flat portion 23 of the tube 2 is bulged to the fins 3 side. Since the pressing force is supplied, the bulged portion of the flat portion 23 is pressed, that is, the tube 2 is compressed so that the upper and lower thicknesses become approximately the thickness b to the thickness a. Become.
そして、 ビード 2 1の頂部と、 この頂部に対向する流路 2 4の 內壁部分との間に隙間がある場合には、 上下の偏平部 2 3が押圧 変形され、 チューブ 2自体が、 適宜上下から圧縮されるので、 そ れらが互いに接近し、 当接した状態又はより近接した状態に矯正 される。 つまり、 少なくとも各ビードごとに上下の部位が、 上下 方向に膨出されているので、 上下の偏平部 2 3が押圧変形され、 ビード 2 1に対向する内壁面部がビード側に接近すると同時に、 ビード 2 1自体も、 対向する内壁面部に接近することになる。 従って、 万一各部の対応寸法にバラツキがあったり、 組み付け 具合によって各部の咬み合いがずれた場合にも、 この偏平部 2 3 が圧縮変型する範囲では、 ビード 2 1の頂部と流路 2 4との間に 、 隙間が形成されることを防止することができる。 If there is a gap between the top of the bead 21 and the wall of the flow path 24 facing the top, the upper and lower flat portions 23 are pressed and deformed, and the tube 2 itself is appropriately deformed. Since they are compressed from above and below, they come closer to each other and are corrected to a state of contact or closer. In other words, at least the upper and lower portions of each bead are bulged in the vertical direction, so that the upper and lower flat portions 23 are pressed and deformed, and at the same time the inner wall portion facing the bead 21 approaches the bead side, The bead 21 itself also approaches the opposing inner wall. Therefore, even if the corresponding dimensions of each part are varied or the bite of each part is displaced due to the assembling condition, the top of the bead 21 and the flow path 24 A gap can be prevented from being formed between them.
尚、 フィン 3は、 偏平部 2 3が完全な平面に押圧変形されなく ても、 その波形が僅かに変形することにより、 チューブ 2に密着 して装着される。  The fin 3 is attached to the tube 2 by slightly deforming its waveform even if the flat portion 23 is not pressed and deformed to a perfect plane.
チューブ 2の端部はへッダパイプ 4の揷入孔 5に揷入され、 こ の組み立て体は、 フラックスを塗布された後炉内に送られ、 加熱 処理により一体ろう付けされる。 接合部 2 0， 2 0同士及ぴビー ド 2 1の頂部と偏平部 2 3とは、 溶融したろう材を充分に得た状 態でろう付けされ、 接合される。  The end of the tube 2 is inserted into the inlet hole 5 of the header pipe 4, and the assembly is fed into a furnace after being coated with a flux, and is brazed by heat treatment. The joining portions 20 and 20 and the top of the bead 21 and the flat portion 23 are brazed and joined in a state where a sufficient amount of molten brazing material is obtained.
尚、 前述した具体例においては、 チューブに備えられた上下の 偏平部内面から、 交互にビードを突出させて設けた構成としたが 、 ビードを一方の面に設けてもよく、 また、 対向した両内面から ビードを突出させて、 ビード頂部同士が当接するようにしてもよ い。  In the specific example described above, the beads are alternately protruded from the inner surfaces of the upper and lower flat portions provided in the tube. However, the beads may be provided on one surface, and The beads may be projected from both inner surfaces so that the tops of the beads come into contact with each other.
更に、 偏平部は、 チューブ上下面の一方のみを膨出させたり、 ビード近傍の必要個所のみを膨出させるようにしてもよい。  Further, the flat portion may be configured to bulge only one of the upper and lower surfaces of the tube, or to bulge only a necessary portion near the bead.
従って、 本具体例によれば、 チューブの中央付近を頂点とする 上下に膨出させた形状に形成したことにより、 該膨出部がフィン からの押圧力によって適宜圧縮変形され、 接合部同士及びビード の頂部と該ビードに対向する内壁部分とが、 ろう付けに最適な接 近 · 当接状態に矯正することができ、 該部分のろう付け性を確実 に向上することができる。 Therefore, according to this specific example, since the tube is formed in a shape that bulges up and down with the vicinity of the center of the tube as the vertex, the bulge is appropriately compressed and deformed by the pressing force from the fin, and The top of the bead and the part of the inner wall facing the bead form an optimal connection for brazing. It can be corrected to a near-contact state, and the brazing property of the portion can be surely improved.
すなわち、 接合部の高さやビードの高さを始めとする各部の対 応寸法に多少のバラツキがあったり、 分配集合部材ゃフインとの 組み付け具合で各チューブの咬み合いが僅かにずれたりして、 ビ 一ドの頂部と流路の内壁部分とが微妙に離れた場合にも、 ろう付 けに最適な接近 ·当接状態に矯正することができる。  In other words, the corresponding dimensions of each part such as the height of the joint and the height of the bead may vary slightly, or the bite of each tube may shift slightly due to the degree of assembly with the distribution assembly member 集合 fin. Even when the top of the bead and the inner wall of the flow path are slightly separated from each other, it is possible to correct the approach / contact state optimal for brazing.
また、 ビードの頂部と流路の内壁部分とが、 その間にプレート の内面から融解したろう材しか侵入しない場合においても、 ろう 付けに最適な接近 · 当接状態とされているので、 確実にろう付け を行うことができる。  Even when the top of the bead and the inner wall of the flow channel enter only the melted brazing material from the inner surface of the plate, the optimal approach and brazing condition for brazing is ensured, so that the brazing is ensured. Can be attached.
これらの結果、 ビードのろう付け性が良好になるので、 歩留が 向上でき、 熱交換率や耐圧性も強化できることになり、 延いては 、 コンデンサ等各種の積層型熱交換器にも対応できる。  As a result, the brazing property of the bead is improved, so that the yield can be improved, the heat exchange rate and the pressure resistance can be enhanced, and further, it can be applied to various laminated heat exchangers such as capacitors. .
更に、 前記具体例では、 一枚のプレートを折り曲げて形成した チューブについて説明したが、 プレートから形成するチューブと しては、 図 4に示すように、 接合部 2 0同士を相互に突き合すよ うに二枚のプレートを重ね合わせて形成したチューブ 2にも適用 することができる。 産業上の利用可能性  Further, in the above specific example, a tube formed by bending a single plate has been described. However, as a tube formed from the plate, as shown in FIG. 4, the joining portions 20 abut each other. Thus, the present invention can be applied to a tube 2 formed by stacking two plates. Industrial applicability
本発明は、 フィンを介装してチューブが平行に積層される熱交換 器とその製造方法であって、 特に、 内部を複数の流路に分割する ビードを備えたチューブのろう付け性の向上を図ったものである 。 従って、 一般のラジェータゃエバポレータ、 並びに耐圧性が要 求されるコンデンサに適用される。 The present invention relates to a heat exchanger in which tubes are stacked in parallel with fins interposed therebetween and a method of manufacturing the same, and particularly to an improvement in brazing performance of a tube provided with a bead for dividing the inside into a plurality of flow paths. It is intended . Therefore, it is applied to a general radiator-evaporator and a capacitor requiring withstand voltage.

Claims

請求の ¾g囲 ¾g box of billing
1 . 一枚のプレートを折り曲げて形成したチューブエレメント 又は二枚のプレートを重ね合わせて形成したチューブエレメント であって、 内部に複数の流路に区切るビードが一体に形成された チューブエレメントを、 フィンを介して平行に積層した熱交換器 において、 1. A tube element that is formed by bending a single plate or a tube element that is formed by stacking two plates, and that has a bead that integrally defines a plurality of flow paths inside, In a heat exchanger stacked in parallel through
積層する前のチューブエレメントの中間部の厚さが、 積層後に おけるチューブエレメントのチューブ面の中間部の厚さよりも大 きく形成されていることを特徴とする熱交換器。  A heat exchanger, wherein the thickness of the middle part of the tube element before lamination is formed larger than the thickness of the middle part of the tube surface of the tube element after lamination.
2 . 積層する前のチューブエレメントは、 その上下双方のチュ ーブ面の中間部がそれぞれのフィン側へ膨出した形状に形成され ていることを特徴とする請求項 1記載の熱交換器。  2. The heat exchanger according to claim 1, wherein the tube elements before stacking are formed such that intermediate portions of both upper and lower tube surfaces are bulged toward the respective fins.
3 . 積層する前のチューブエレメントは、 その一方のチューブ 面の中間部がフィン側へ膨出した形状に形成されていることを特 徴とする請求項 1記載の熱交換器。  3. The heat exchanger according to claim 1, wherein the tube element before stacking is formed such that an intermediate portion of one of the tube surfaces is bulged toward the fin side.
4 . 一枚のプレートを折り曲げて形成したチューブエレメント 又は二枚のプレートを重ね合わせて形成したチューブエレメント であって、 内部に複数の流路に区切るビードが一体に形成された チューブエレメントを、 フィンを介して平行に積層した熱交換器 の製造方法において、  4. A tube element formed by bending one plate or a tube element formed by laminating two plates, and having a bead for integrally dividing a plurality of flow paths inside, In a method for manufacturing a heat exchanger laminated in parallel through
積層する前のチューブエレメントの中間部を予めフィン側へ膨 出した形状に形成しておき、 その後、 これらのチューブエレメン トをフィンを介して積層することにより該チューブエレメントを 圧縮して熱交換器の組み立て体を形成し、 フラックスを塗布して 炉内に送り、 加熱処理により一体ろう付けすることを特徴とする 熱交換器の製造方法。 The intermediate portion of the tube element before lamination is formed in advance in a shape swelling toward the fin side, and then these tube elements are laminated via the fins, whereby the tube element is laminated. A method of manufacturing a heat exchanger, comprising compressing to form an assembly of a heat exchanger, applying a flux, sending the flux into a furnace, and brazing integrally by a heat treatment.
補正書の請求の範囲 Claims of amendment
[ 1 9 9 8年 3月 1 0日 （1 0 . 0 3 . 9 8 ) 国際事務局受理：出願当初の請求の範囲 1及び 4は 補正された；他の請求の範囲は変更なし。 （ 2頁） ] [10.03.98 March 10, 1998] Accepted by the International Bureau: Claims 1 and 4 as originally filed have been amended; other claims remain unchanged. (Page 2)]
1 . (補正後） 一枚のプレートを折り曲げて形成したチューブ エレメント又は二枚のプレートを重ね合わせて形成したチューブ1. (After correction) Tube element formed by bending one plate or tube formed by overlapping two plates
5 エレメントであって、 内部に複数の流路に区切るビードが一体に 形成されたチューブエレメントを、 フィンを介して平行に積層し た熱交換器において、 In a heat exchanger in which tube elements, each of which has five elements, and in which beads for dividing into a plurality of flow paths are integrally formed, are stacked in parallel via fins,
積層する前のチューブエレメントの中間部の厚さが、 積層後に おけるチューブエレメントのチューブ面の中間部の厚さよりも大0 きく形成されているものであって、  The thickness of the middle part of the tube element before lamination is formed to be larger than the thickness of the middle part of the tube surface of the tube element after lamination,
チューブエレメント積層後におけるチューブエレメントの中間 部の、 一方のチューブエレメントの内面から他方のチューブエレ メントに向って突出するビードが、 当該他方のチューブエレメン トの内面又はビードに圧接するように、 前記積層する前のチュー5 ブエレメントの中間部の厚さが設定されていることを特徴とする 熱交換器。  The lamination is performed such that a bead projecting from the inner surface of one of the tube elements toward the other tube element at the intermediate portion of the tube element after the lamination of the tube element is pressed against the inner surface or the bead of the other tube element. The heat exchanger characterized in that the thickness of the middle part of the tube element before the heating is set.
2 . 積層する前のチューブエレメントは、 その上下双方のチュ ーブ面の中間部がそれぞれのフィン側へ膨出した形状に形成され ていることを特徴とする請求項 1記載の熱交換器。 2. The heat exchanger according to claim 1, wherein the tube elements before stacking are formed such that intermediate portions of both upper and lower tube surfaces are bulged toward the respective fins.
0 3 . 積層する前のチューブエレメントは、 その一方のチューブ 面の中間部がフィン側へ膨出した形状に形成されていることを特 徴とする請求項 1記載の熱交換器。 0 3. The heat exchanger according to claim 1, wherein the tube element before stacking is formed such that an intermediate portion of one tube surface is bulged toward the fin side.
4 . (補正後） 一枚のプレートを折り曲げて形成したチューブ エレメント又は二枚のプレートを重ね合わせて形成したチューブ 補正された用紙 （条約第 19条） エレメントであって、 内部に複数の流路に区切るビードが一体に 形成されたチューブエレメントを、 フィンを介して平行に積層し た熱交換器の製造方法において、 4. (After amendment) Tube element formed by bending one plate or tube formed by overlapping two plates Corrected paper (Article 19 of the Convention) In a method for manufacturing a heat exchanger, a tube element in which a bead for dividing into a plurality of flow passages is integrally formed inside is laminated in parallel through a fin.
積層する前のチューブエレメントの中間部を予めフィン側へ膨 出した形状に形成しておき、 その後、 これらのチューブエレメン トをフィンを介して積層することにより該チューブエレメントを 圧縮し、  An intermediate portion of the tube element before the lamination is formed in a shape which is bulged in advance to the fin side, and then the tube element is compressed by laminating these tube elements via the fins.
前記チューブエレメントの圧縮により、 チューブエレメントの 中間部の、 一方のチューブエレメントの内面から他方のチューブ エレメントに向って突出するビードを、 当該他方のチューブエレ メントの内面又はビードに圧接させ、  By compressing the tube element, a bead projecting from the inner surface of one of the tube elements toward the other tube element at the intermediate portion of the tube element is pressed against the inner surface or the bead of the other tube element,
熱交換器の組み立て体を形成し、 フラックスを塗布して炉内に 送り、 加熱処理により一体ろう付けすることを特徴とする熱交換 器の製造方法。  A method for manufacturing a heat exchanger, comprising forming an assembly of a heat exchanger, applying a flux, sending the applied flux into a furnace, and brazing integrally by heat treatment.
補正された用紙 （条約第 19条） Amended paper (Article 19 of the Convention)
PCT/JP1997/003589 1996-10-08 1997-10-07 Heat exchanger and method of manufacturing same WO1998015794A1 (en)

Priority Applications (2)

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EP97942272A EP0866301A4 (en) 1996-10-08 1997-10-07 Heat exchanger and method of manufacturing same
KR1019980704154A KR19990071870A (en) 1996-10-08 1997-10-07 Heat exchanger and its manufacturing method

Applications Claiming Priority (2)

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JP8/267287 1996-10-08
JP8267287A JPH10111091A (en) 1996-10-08 1996-10-08 Heat exchanger

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JP2002130969A (en) * 2000-10-24 2002-05-09 Japan Climate Systems Corp Tube for heat exchanger
JP4524035B2 (en) * 2000-12-06 2010-08-11 株式会社日本クライメイトシステムズ Tube for heat exchanger
JP2002243387A (en) * 2001-02-21 2002-08-28 Zexel Valeo Climate Control Corp Heat exchanger and its manufacturing method
DE102010063074B3 (en) * 2010-12-14 2012-04-12 INSTITUT FüR MIKROTECHNIK MAINZ GMBH Microfluidic component, reactor of several such components and method for their preparation
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EP0866301A1 (en) 1998-09-23

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