WO1998015794A1 - Echangeur de chaleur et son procede de fabrication - Google Patents

Echangeur de chaleur et son procede de fabrication 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
Authority
WO
WIPO (PCT)
Prior art keywords
tube
tube element
heat exchanger
bead
lamination
Prior art date
Application number
PCT/JP1997/003589
Other languages
English (en)
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/fr
Priority to KR1019980704154A priority patent/KR19990071870A/ko
Publication of WO1998015794A1 publication Critical patent/WO1998015794A1/fr

Links

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

On met au point cet échangeur de chaleur (1) par stratification d'éléments de tube (2) en parallèle à ailettes (3) intercalées, ces éléments de tube étant formés par pliage d'une plaque unique ou par chevauchement de deux plaques renfermant des moulures (21) divisant l'intérieur d'un élément de tube en plusieurs compartiments représentant autant de circuits d'écoulement (24). L'épaisseur (b) d'une partie intermédiaire des éléments de tube est plus grande avant stratification que l'épaisseur (a) d'une partie intermédiaire en surface des éléments de tube après stratification. L'invention porte également sur un procédé de fabrication d'échangeur de chaleur, lequel procédé consiste à constituer tout d'abord une partie intermédiaire des éléments de tube (2) avant la stratification permettant d'obtenir une configuration donnée, cette partie intermédiaire se déployant vers les ailettes, à stratifier ensuite les éléments de tubes en ménageant la place des ailettes entre eux et ce, afin de comprimer les éléments de tube pour former un assemblage d'échangeur de chaleur, à appliquer un flux à cet assemblage puis introduire ledit assemblage dans un foyer pour le soumettre à un brasage intégré par traitement thermique. Il s'ensuit que la partie déployée est comprimée par soudage avec pression des ailettes au moment de la stratification des éléments de tube de manière à corriger les parties supérieures d'éléments de tube ou les moulures et les parties internes de paroi des éléments de tube pour permettre le brasage.
PCT/JP1997/003589 1996-10-08 1997-10-07 Echangeur de chaleur et son procede de fabrication WO1998015794A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP97942272A EP0866301A4 (fr) 1996-10-08 1997-10-07 Echangeur de chaleur et son procede de fabrication
KR1019980704154A KR19990071870A (ko) 1996-10-08 1997-10-07 열교환기및그제조방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8267287A JPH10111091A (ja) 1996-10-08 1996-10-08 熱交換器
JP8/267287 1996-10-08

Publications (1)

Publication Number Publication Date
WO1998015794A1 true WO1998015794A1 (fr) 1998-04-16

Family

ID=17442742

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/003589 WO1998015794A1 (fr) 1996-10-08 1997-10-07 Echangeur de chaleur et son procede de fabrication

Country Status (4)

Country Link
EP (1) EP0866301A4 (fr)
JP (1) JPH10111091A (fr)
KR (1) KR19990071870A (fr)
WO (1) WO1998015794A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6339937B1 (en) 1999-06-04 2002-01-22 Denso Corporation Refrigerant evaporator
JP4585682B2 (ja) * 2000-10-24 2010-11-24 株式会社日本クライメイトシステムズ 熱交換器用チューブ
JP2002130969A (ja) * 2000-10-24 2002-05-09 Japan Climate Systems Corp 熱交換器用チューブ
JP4524035B2 (ja) * 2000-12-06 2010-08-11 株式会社日本クライメイトシステムズ 熱交換器用チューブ
JP2002243387A (ja) * 2001-02-21 2002-08-28 Zexel Valeo Climate Control Corp 熱交換器及びその製造方法
DE102010063074B3 (de) * 2010-12-14 2012-04-12 INSTITUT FüR MIKROTECHNIK MAINZ GMBH Mikrofluidisches Bauteil, Reaktor aus mehreren solchen Bauteilen und Verfahren zu deren Herstellung
CN102554574A (zh) * 2012-01-18 2012-07-11 金沙 一种板壳式蒸发器板束元件的加工工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813993A (ja) * 1981-07-17 1983-01-26 Toyo Radiator Kk 熱交換器におけるコアの組立方法
JPS6166091A (ja) * 1984-09-06 1986-04-04 Toyo Radiator Kk 熱交換器用チユ−ブ材及び該チユ−ブ材による熱交換器コアの製造方法
JPH0552565U (ja) 1991-12-20 1993-07-13 サンデン株式会社 熱交換器
JPH07178542A (ja) * 1993-12-21 1995-07-18 Zexel Corp 熱交換器のろう付け方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655181A (en) * 1949-09-14 1953-10-13 Mccord Corp Tube construction
US5186251A (en) * 1992-06-01 1993-02-16 General Motors Corporation Roll formed heat exchanger tubing with double row flow passes
JP3146442B2 (ja) * 1992-11-27 2001-03-19 株式会社ゼクセルヴァレオクライメートコントロール 熱交換器用チューブおよびその製造方法
DE4446754A1 (de) * 1994-12-24 1996-06-27 Behr Gmbh & Co Verfahren zur Herstellung eines Wärmetauschers
DE19548495C2 (de) * 1995-12-22 2000-04-20 Valeo Klimatech Gmbh & Co Kg Wärmetauscherblock für Wärmetauscher für Kraftfahrzeuge und Verfahren zu dessen Herstellung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813993A (ja) * 1981-07-17 1983-01-26 Toyo Radiator Kk 熱交換器におけるコアの組立方法
JPS6166091A (ja) * 1984-09-06 1986-04-04 Toyo Radiator Kk 熱交換器用チユ−ブ材及び該チユ−ブ材による熱交換器コアの製造方法
JPH0552565U (ja) 1991-12-20 1993-07-13 サンデン株式会社 熱交換器
JPH07178542A (ja) * 1993-12-21 1995-07-18 Zexel Corp 熱交換器のろう付け方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0866301A4 *

Also Published As

Publication number Publication date
EP0866301A1 (fr) 1998-09-23
JPH10111091A (ja) 1998-04-28
KR19990071870A (ko) 1999-09-27
EP0866301A4 (fr) 1999-10-06

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