EP2434245A1 - Wärmetauscher und Montageverfahren dafür - Google Patents

Wärmetauscher und Montageverfahren dafür Download PDF

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Publication number
EP2434245A1
EP2434245A1 EP10181160A EP10181160A EP2434245A1 EP 2434245 A1 EP2434245 A1 EP 2434245A1 EP 10181160 A EP10181160 A EP 10181160A EP 10181160 A EP10181160 A EP 10181160A EP 2434245 A1 EP2434245 A1 EP 2434245A1
Authority
EP
European Patent Office
Prior art keywords
tank
header plate
tabs
positioning
transverse
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP10181160A
Other languages
English (en)
French (fr)
Other versions
EP2434245B1 (de
Inventor
Bartosz Rybczynski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP20100181160 priority Critical patent/EP2434245B1/de
Publication of EP2434245A1 publication Critical patent/EP2434245A1/de
Application granted granted Critical
Publication of EP2434245B1 publication Critical patent/EP2434245B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • F28F9/0226—Header boxes formed by sealing end plates into covers with resilient gaskets
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/122—Fastening; Joining by methods involving deformation of the elements by crimping, caulking or clinching
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • F28F2280/04—Means for preventing wrong assembling of parts

Definitions

  • This invention relates to heat exchangers and more particularly to sealing junctions in a heat exchanger and a method of assembly thereof.
  • Heat exchangers equip the vast majority of motor vehicles powered by an internal combustion engine. Heat exchangers may be used for engine cooling and for passenger's climate control. Most heat exchangers include a tank and a header plate. It has become common practice to manufacture the tank from a plastic material and the header from a heat conductive metal material such as aluminum. The plastic tank is mechanically joined to the header plate. It is vital that the junction between the tank and header plate be leak-free and durable in spite of the corrosive fluid that flows through the heat exchanger.
  • the tank opening is rectangular and so is the header plate.
  • the header plate is provided with a peripheral groove in which is placed a gasket and when placed in position, the walls of the plastic tank come in the groove, against the gasket, sealing the tank-header plate interface. During the process the tank is kept in position by the corners of the header plate.
  • the walls of the tank are also provided with a foot portion that is peripheral to the opening and, to permanently fix the header plate on the tank, tabs, extending along the outer edge of the header are bent over the foot portion. Prior to bending, the tabs extending from the edges of the header plate are straight and, the bending forces applied on the tabs enable a right angle bending of the tabs.
  • the header plate is provided with partially pre-bent tabs.
  • the tank is axially pressed against the header plate, compressing the gasket for sealing purposes.
  • the partially pre-bent tabs of the header plate are then further bent over a shoulder of the plastic tank thus grabbing said tank and permanently fixing together the tank and the header plate.
  • the present invention provides a method for assembling a tank and a header plate of a heat exchanger.
  • the method comprises the steps of:
  • the method further comprises the step of clinching the transverse tabs inwardly over the foot portion of the tank opening, after the clinching step applied to the lateral tabs, in order to further secure the fixation of the header plate to the tank in the interlocked position.
  • the process further comprise the step of pre-bending the lateral tabs prior to the pressing step such that each tab extends from the longitudinal edge through an outwardly bent first portion to a second portion inwardly bent relative to the first portion so that, when axially pressing the header plate onto the tank, the foot portion passes between the free extremities of the lateral tabs.
  • the clinching step applied to the lateral tabs is done by bending inwardly the first portion.
  • the process may comprise the step of operating transversal notches in positioning tabs in order to pre-determine the location where the tab will bend and in order to ease the clinching of said tabs.
  • the invention is also related to a heat exchanger for a vehicle having a fluid tank and a header plate.
  • the tank has walls defining an axial opening in the bottom with an outer peripheral foot portion comprising longitudinal and transverse sections.
  • the header plate covers the opening and puts the tank in fluid communication with cooling tubes.
  • the header plate has longitudinal and transverse edges, and a plurality of lateral tabs extending axially from the longitudinal edges towards the tank, the lateral tabs being bent over the foot portion thus fixing the assembly.
  • Each transverse wall of the tank is further provided with at least one extension longitudinally protruding and each transverse edge of the header plate is further provided with at least one pair of positioning tabs extending axially from said transverse edge towards the tank, each pair defining in-between its two positioning tabs an intermediate space having a shape allowing complementary engagement with a corresponding tank's extension.
  • the header plate is positioned onto the tank such that the header plate and the tank are interlocked in a transverse direction by positioning the extensions into said spaces.
  • Each positioning tab is in contact with the corresponding face of the corresponding extension, thus prohibiting any further transverse displacement of the header plate relative to the tank.
  • the lateral tabs are clinched inwardly over the foot portion of the tank opening in order to fix the header plate onto the tank in the interlocked position.
  • the positioning tabs may be clinched over the foot portion for further fixing the header plate onto the tank.
  • a heat exchanger 10 as shown on Figure 1 , used in a motor vehicle comprises two tank-header plate assemblies 12, each comprising a tank 14 a header plate 16 and a gasket 20, the assemblies 12 being interconnected by flat tubes 48 where a cooling fluid circulates. Cooling fins are interposed between the tubes to increase the thermal transfer.
  • the initial step of the process of making the tank-header plate assembly 12, consists in providing the tank 14, the header plate 16 and the gasket 20.
  • the tank 14 comprises two longitudinal walls 22, and two transverse walls 24.
  • the walls 22, 24, define an inside volume 28 for receiving a cooling fluid.
  • the walls 22, 24, also define a rectangular opening 30 surrounded by a peripheral foot portion 32 of the walls 22, 24.
  • the tank 14 is usually molded from plastic but other materials can be utilized as well.
  • the header plate 16 is designed to be fixed onto the tank 14, over the opening 30.
  • the header plate 16 is made of metal and it has the size and shape of the opening 30 surrounded by the peripheral foot portion 32.
  • the header plate 16 comprises a header face 18 surrounded by a peripheral side wall 34 extending in the mounting direction M from the edges of the header face 18.
  • the header face 18 is provided with a plurality of slots 36, which are usually rectangular or oblong, for connecting the flat tubes 48 within which the cooling fluid circulates.
  • the slots 36 When presented to the tank 14, the slots 36 are only facing the opening 30 and the sealing surface 38 that surrounds the slots 36 by being adjacent to the side wall 34 faces the lower face 40 of the foot portion 32.
  • the side wall 34 is adjusted for complementary engagement of the foot portion 32.
  • the sealing surface 38 aims at receiving the gasket 20 and, can either be designed and made flat, as represented on the Figures, thus minimizing the overall dimensions of the header plate 16, or may be provided with a continuous channel (not represented) within which the gasket 20 can be placed.
  • a cured-in-place gasket may advantageously be utilized as an alternative to the separate gasket 20 represented on Figure 1 .
  • the gasket would be formed and vulcanized directly on the lower face 40 of the foot portion 32.
  • the header plate 16 is further provided with a plurality of lateral tabs 50 extending from the longitudinal edges 52 of the sidewall 34.
  • the lateral tabs 50 extend in the mounting direction M and are designed for being bent over the upper face 46 of the foot portion 32.
  • the tank 14 and the header plate 16 are provided with complementary features.
  • the tank 14 has a longitudinal positioning extension 60, protruding from each of its transverse walls 24, while the header plate 16 is provided with pairs of positioning tabs 64, 66, extending along each of its transverse edges 56.
  • the intermediate space 72, between the two positioning tabs 64, 66, has the shape allowing a complementary engagement with a corresponding tank's extension 60.
  • each positioning extension 60 has two lateral faces 90, the in-between distance in the transverse direction T being equal to the width of the intermediate space 72 thus, when engaged, the positioning extension 60 is in contact with the two positioning tabs 64, 66.
  • the complementary profiles of the positioning extensions 60 and of the intermediate spaces 72 may be further described in alternative options.
  • the lateral faces 90 may be parallel, as presented in the Figures, or may be slightly biased (not represented) closer by the lower face 40 of the foot portion 32 than by the upper face 46 so, when presented to the corresponding intermediate space 72, the engagement is eased and when fully engaged the positioning extension 60 is in contact with the two positioning tabs 64, 66.
  • one of the positioning extensions 60 may be larger than the other one so the largest extension can only fit into the largest intermediate space thus, creating an orientation key for the header plate 16 relative to the tank 14.
  • the header plate 16 may be designed without side wall 34, the lateral tabs 50 extending directly from the edges 52, of the header face 18.
  • all tabs may extend straightly in the mounting direction M, as represented for the positioning tabs 64, 66, but may preferably be pre-bent prior to the assembly step of the process, as represented on Figure 3 for the lateral tabs 50.
  • the pre-bent lateral tabs 50 extend from the longitudinal edge 52 of the header plate 16 to an outwardly bent first portion 78 then to a second portion 80 inwardly bent relative to the first portion 78 until a free extremity 82 inwardly oriented.
  • the positioning tabs 64, 66 may also straightly extend from the header plate 16 or may, similarly to the lateral tabs 50, be pre-bent.
  • pre-bent positioning tabs 64, 66 it is mandatory that the pre-bending does not alter the engagement of the positioning extensions 60 in their corresponding intermediate spaces 72 during the assembling step of the process.
  • the space between the free ends 82 of the tabs must be sufficient to enable the tank 14 to pass in-between them for being properly positioned vis-à-vis the header plate 16.
  • the positioning tabs 64, 66 are preferably provided with notches 84 that determine a weaker section 86 of the tab where the final bending will naturally occur.
  • the tabs may be provided with a pair of symmetrical notches 84.
  • To create the weaker section 86 in the tab multiple other alternatives are possible such as a single notch or a transverse continuous groove internally or externally operated.
  • the notches 84 are operated on straight positioning tabs 64, 66, but may as well be operated on pre-bent tabs. Similarly (not represented), lateral tabs 50 may as well be provided with notches 84.
  • the gasket 20 is designed to continuously follow the sealing surface 38 adjacent to the side wall 34, in order to be just between the header face 18 and the lower face 40 of the foot portion 32.
  • the gasket 20 is usually made of a rubber type material not alterable by the cooling fluid.
  • the subsequent step of the process is to position them relative to each other.
  • the gasket 20 is positioned in the header plate 16 on the sealing surface 38 or, as alternatively described, in the channel made for the purpose. In place the gasket 20 surrounds the slots 36.
  • the tank 14 is presented to the header plate 16 and gasket 20 such that the positioning extensions 60 are aligned with their corresponding intermediate spaces 72.
  • the tank 14 is pressed in the mounting direction M on the header plate 16, thus engaging the positioning extensions 60, into their corresponding intermediate spaces 72.
  • the gasket 20 is compressed between the lower face 40 of the foot portion 32 and the sealing surface 38 of the header plate 16.
  • the engagement of the positioning extensions 60, into the intermediate spaces 72 creates a transverse interlock 88 that prevents any further transverse displacement of the tank 14 relative to the header plate 16 thus advantageously ensuring a perfect positioning during the following steps of the process and during the life of the final product.
  • the tank 14 and header plate 16 may be provided with a lateral interlock (not represented) preventing lateral displacements of the tank 14 relative to the header plate 16.
  • Lateral interlock could be advantageously implemented in case of pre-bent transverse tabs 64, 66.
  • Such a lateral interlock would comprise a transverse positioning extension, protruding from each of its lateral walls 22, while the header plate 16 would be provided with pairs of positioning tabs extending along each of its longitudinal edges 52, the intermediate space between the two positioning tabs having the shape allowing a complementary engagement with a corresponding tank's extension.
  • the following step of the process consists in permanently fixing the header plate 16 onto the tank 14 by bending the lateral tabs 50 over the upper face 46 of the foot portion 32. This operation is done by applying on the lateral tabs 50 forces F inwardly oriented.
  • pre-bent tabs In the case of pre-bent tabs the bending occurs in the first portion 78 of the tabs, as represented for the lateral tabs 50 on the sequence Figure 2 - Figure 3 . Said first portion 78 being outwardly pre-bent is, under the inwardly oriented force F, straighten thus moving the second portion 80 of the tabs 50 over the upper face 46 of the foot portion 32.
  • the bent lateral tabs 50 permanently fix the header plate 16 onto the tank 14 in the desired position.
  • the assembly may have been designed so the lateral tabs 50 are sufficient to fix the header plate 16 onto the tank 14.
  • the positioning tabs 64, 66 are designed straight with or without notches 84.
  • the positioning tabs 64, 66 are, as represented on Figure 5 , bent over the upper face 46 of the foot portion 32 in a final step of the process.
  • the bending of the transverse tabs 64, 66 occurs by applying inwardly oriented forces on said positioning tabs 64, 66.
  • the interlock 88 engaged in the previous step of the process remains active during and after bending the positioning tabs 64, 66.
  • the header plate 16 may, in addition to the positioning tabs 64, 66, be provided on its transverse edges 56 with additional fixation tabs similar in design to the lateral tabs 50.
  • the process has been described in focusing exclusively on the assembly of the tank 14 and the header plate 16. It is usual to initially braze together the metallic flat tubes cooling fins and header plates, so creating a single metallic part. Once this is done, the subsequent step is to assemble a gasket 20 and the plastic tank on the header plate.
  • the interlock 88 has a further advantage. Should a diagnosis be required, the correct positioning of the extensions 60, in their corresponding intermediate space 72, is an easy visual check during the manufacturing process as well as during the life of the product.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP20100181160 2010-09-28 2010-09-28 Montageverfahren für Wärmetauscher Active EP2434245B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20100181160 EP2434245B1 (de) 2010-09-28 2010-09-28 Montageverfahren für Wärmetauscher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100181160 EP2434245B1 (de) 2010-09-28 2010-09-28 Montageverfahren für Wärmetauscher

Publications (2)

Publication Number Publication Date
EP2434245A1 true EP2434245A1 (de) 2012-03-28
EP2434245B1 EP2434245B1 (de) 2013-05-29

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012088011A (ja) * 2010-10-21 2012-05-10 Mitsubishi Heavy Ind Ltd 熱交換器
DE102013227113A1 (de) * 2013-12-23 2015-07-09 MAHLE Behr GmbH & Co. KG Wärmetauscher mit umlaufender Dichtung
CN105806139A (zh) * 2014-12-30 2016-07-27 泰安鼎鑫冷却器有限公司 一种水室与主板的装配方式
WO2017026210A1 (ja) * 2015-08-07 2017-02-16 株式会社デンソー 熱交換器
WO2019175433A1 (en) * 2018-03-16 2019-09-19 Valeo Termico, S.A. Heat exchanger for gases and method for assembling a heat exchanger
JP2019168200A (ja) * 2018-03-26 2019-10-03 株式会社ティラド 熱交換器のタンク構造
FR3082927A1 (fr) * 2018-06-26 2019-12-27 Valeo Systemes Thermiques Boite collectrice et echangeur thermique correspondant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6082446A (en) 1998-04-20 2000-07-04 Ahaus Tool And Engineering, Inc. Sealing method and apparatus for a heat exchanger
US20020023734A1 (en) * 2000-08-09 2002-02-28 Wagner William W. Charge air cooler and method of assembling the same
DE20307881U1 (de) * 2003-05-21 2004-09-23 Autokühler GmbH & Co. KG Wärmeaustauscher, insbesondere Ladeluftkühler
EP1921413A1 (de) * 2006-11-09 2008-05-14 João de Deus & Filhos, S.A. Ein Wärmetauscher, insbesondere Ladeluftkühler für Kraftfahrzeuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6082446A (en) 1998-04-20 2000-07-04 Ahaus Tool And Engineering, Inc. Sealing method and apparatus for a heat exchanger
US20020023734A1 (en) * 2000-08-09 2002-02-28 Wagner William W. Charge air cooler and method of assembling the same
DE20307881U1 (de) * 2003-05-21 2004-09-23 Autokühler GmbH & Co. KG Wärmeaustauscher, insbesondere Ladeluftkühler
EP1921413A1 (de) * 2006-11-09 2008-05-14 João de Deus & Filhos, S.A. Ein Wärmetauscher, insbesondere Ladeluftkühler für Kraftfahrzeuge

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012088011A (ja) * 2010-10-21 2012-05-10 Mitsubishi Heavy Ind Ltd 熱交換器
DE102013227113A1 (de) * 2013-12-23 2015-07-09 MAHLE Behr GmbH & Co. KG Wärmetauscher mit umlaufender Dichtung
US10436526B2 (en) 2013-12-23 2019-10-08 MAHLE Behr GmbH & Co. KG Heat exchanger with a circumferential seal
CN105806139A (zh) * 2014-12-30 2016-07-27 泰安鼎鑫冷却器有限公司 一种水室与主板的装配方式
WO2017026210A1 (ja) * 2015-08-07 2017-02-16 株式会社デンソー 熱交換器
JPWO2017026210A1 (ja) * 2015-08-07 2018-02-08 株式会社デンソー 熱交換器
WO2019175433A1 (en) * 2018-03-16 2019-09-19 Valeo Termico, S.A. Heat exchanger for gases and method for assembling a heat exchanger
JP2019168200A (ja) * 2018-03-26 2019-10-03 株式会社ティラド 熱交換器のタンク構造
FR3082927A1 (fr) * 2018-06-26 2019-12-27 Valeo Systemes Thermiques Boite collectrice et echangeur thermique correspondant

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