EP0493199B1 - Echangeur de chaleur, notamment pour véhicule automobile, et procédé pour sa fabrication - Google Patents

Echangeur de chaleur, notamment pour véhicule automobile, et procédé pour sa fabrication Download PDF

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Publication number
EP0493199B1
EP0493199B1 EP19910403441 EP91403441A EP0493199B1 EP 0493199 B1 EP0493199 B1 EP 0493199B1 EP 19910403441 EP19910403441 EP 19910403441 EP 91403441 A EP91403441 A EP 91403441A EP 0493199 B1 EP0493199 B1 EP 0493199B1
Authority
EP
European Patent Office
Prior art keywords
tubes
heat exchanger
bank
clamping
exchanger according
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.)
Expired - Lifetime
Application number
EP19910403441
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0493199A1 (fr
Inventor
Jean-François Bouvot
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.)
Valeo Thermique Habitacle
Original Assignee
Valeo Thermique Habitacle
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 Valeo Thermique Habitacle filed Critical Valeo Thermique Habitacle
Publication of EP0493199A1 publication Critical patent/EP0493199A1/fr
Application granted granted Critical
Publication of EP0493199B1 publication Critical patent/EP0493199B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/165—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators

Definitions

  • the invention relates to a heat exchanger intended in particular for a motor vehicle and a method for its manufacture.
  • Heat exchangers are already known which comprise a bundle of parallel tubes having respective ends which open onto the same end face of the bundle and into which the ends, respectively of conjugated form, of connecting tubes are fitted.
  • connection tubes which ensure the distribution of a heat transfer fluid to the tubes of the exchanger, are usually U-shaped tubes and, in the case of an exchanger carrying a refrigerant, capillary tubes, of smaller section. than that of the bundle tubes.
  • Document EP-A-0173 027 also discloses a heat exchanger which comprises a core carrying crimping rings arranged in a geometric configuration corresponding to that of the ends of the bundle tubes on said end face to ensure the crimping of the ends of bundle tubes with the corresponding ends of the connection tubes, after their mutual fitting.
  • the object of the invention is in particular to remedy the aforementioned drawbacks.
  • a heat exchanger of the type defined in the introduction, characterized in that the core is formed in a semi-rigid material, for example rubber or elastomer and in that the ring is formed in a more rigid material than that of the ends of the tubes to be connected, for example polyamide filled with glass fibers.
  • the crimping rings are carried by a flexible core, they can, during the crimping operation, compensate for the dimensional variations possibly presented by the heat exchanger during manufacture, relative to the reference dimensions. In addition, crimping can be carried out either simultaneously or in several stages.
  • each crimping ring comprises an annular body having an anterior annular rim of rounded outline, facilitating the introduction of one end of a tube of the bundle and a posterior annular rim, said ring delimiting an internal passage progressively widening from the posterior annular rim to the anterior annular rim.
  • the abovementioned internal passage defines, on the side of the anterior annular rim, an insertion zone whose internal section is wider than the external section of the end of the tube of the bundle before crimping and, on the side of the posterior annular rim, a clamping zone whose internal section is narrower than the external section of the end of the tube of the bundle before crimping.
  • the abovementioned internal passage is defined by two frustoconical walls which are connected to each other.
  • the core carrying the crimping rings comprises holes in which the abovementioned rings are housed.
  • each ring includes a peripheral annular groove to receive the body of the corresponding hole.
  • the aforementioned core can be formed from a semi-rigid material, in particular rubber or elastomer.
  • Each of the crimping rings is made of a more rigid material than that of the ends of the tubes to be connected, for example polyamide loaded with glass fibers.
  • the heat exchanger shown in FIG. 1 comprises a bundle 10 formed of a multiplicity of tubes 12, of parallel axes, passing through a multiplicity of fins 14 extending parallel to each other and perpendicular to the axis of the tubes.
  • the tubes 12 have respective ends 16 which open on the same end face of the bundle, in a plane perpendicular to the axes of the tubes 12.
  • the corresponding ends 18 of two connection tubes 20 are fitted together. supplied by a common pipe 22.
  • the ends 24 of U-shaped tubes 26 are fitted, each U-shaped tube ensuring a fluid connection between two adjacent tubes 12 of the bundle 10.
  • the ends 18 of the tubes 20 and the ends 24 of the tubes 26 are fitted into the ends, of conjugate shape, of the tubes 12 of the bundle 10. After fitting, the ends 16 are crimped onto the ends 18 and onto the ends 24, here simultaneously, thanks to a flexible core 28 carrying crimping rings 30 ( Figures 1 and 2).
  • This core is formed from a flexible or semi-rigid material, for example rubber or elastomer.
  • ends 16 and 18 are crimped in stages or sequences, such as rows of tubes by rows of tubes or in any other way.
  • the crimping rings 30 carried by the flexible core 28 are arranged in a geometric configuration corresponding to that of the ends 16 of the tubes 12 of the bundle 10, on the end face considered of the bundle.
  • the flexible core 28 carries two rows of crimping rings 30, arranged in the same geometric configuration as that of the ends of the tubes 12 of the bundle.
  • FIG 3 shows another flexible core 32, produced according to the same principle as that of the core 28 of Figures 1 and 2, but here carrying thirty-five crimping rings 30, arranged in five rows of seven rings each.
  • the core 32 and the crimping rings 30 which it carries are intended to fit on a bundle of tubes (not shown) comprising five rows of seven tubes each.
  • the flexible core 32 is formed from a flexible or semi-rigid material, for example rubber or elastomer.
  • the core 32 has a generally rectangular shape, being limited by two large parallel edges 34 and 36 and by two small parallel edges 38 and 40.
  • the core 32 provides a multiplicity of holes 44 (FIG. 4), thirty-five in the example considered, arranged in five rows of seven holes each, the holes of a row being staggered relative to the holes of the adjacent row (s).
  • Each of the crimping rings 30 (FIG. 4) comprises an annular body having an anterior annular rim 46 of rounded outline to facilitate, as will be seen below, the introduction of one end of a bundle tube, as well as a posterior annular rim 48.
  • the ring 30 delimits an internal passage 50 which widens progressively from the posterior annular rim 48 to the anterior annular rim 46.
  • the internal passage 50 defines, on the side of the front edge 46, an insertion zone whose internal section (diameter D1) is wider than the external section of the end of the tube of the bundle before crimping. Furthermore, the internal passage 50 defines, on the side of the posterior annular rim 48, a clamping zone whose internal section (diameter D2) is narrower than the external section of the end of the tube of the bundle before crimping.
  • the internal passage 50 is delimited by two frustoconical walls 52 and 54 situated respectively on the side of the front edge 46 and the rear edge 48.
  • the body of the ring includes a peripheral annular groove 56 suitable for receiving the edge of the hole 44.
  • the ring 30 has a shape of revolution around an axis XX and is intended to fit in a hole 44 of circular shape.
  • the ring 30 is made of a more rigid material than that of the ends of the tubes to be connected, for example in metal, or in a rigid plastic material, such as polyamide loaded with glass fibers.
  • FIGS. 5 and 6 show the implementation of the method of the invention.
  • the end 18 of the tube 20 is flared so as to fit tightly inside the end 16, also flared, of the tube 12.
  • the external diameter of the end 16 before crimping (FIG. 1) is less than the diameter D1 of the zone of introduction of the passage 50 and greater than the diameter D2 of the tightening zone of the passage 50 (FIG. 4).
  • each of the rings 30 moves in the axial direction and the corresponding internal passage 50 of the ring ensures the crimping of ends 16 and 18 previously fitted.
  • the end 16 is compressed radially inward, which also results in radial compression inward of the end 18.
  • a deformable metal for example aluminum
  • connection tubes are first introduced through the corresponding crimping rings carried by the flexible core, so that said ends project beyond the front edges of the rings. .
  • the ends of the connection tubes are then fitted into the corresponding ends of the tubes of the bundle, then a pressure, here simultaneous, is exerted on each of the rings 30, so as to ensure the simultaneous crimping of the ends of the tubes of the bundle on the corresponding ends connecting tubes.
  • each of the rings 30 is automatically positioned around the end of the tube of the corresponding bundle. It is thus possible to compensate for any dimensional variations in the bundle of tubes with respect to the reference dimensions.
  • a press (not shown) comprising support means capable of cooperating with the rear flanges 48 of the crimping rings 30.
  • the rings and the corresponding holes of the flexible cores have a shape of revolution, the tubes used being circular.
  • the holes in the core are in correspondence.
  • the invention applies to any type of heat exchanger, in particular to air conditioning installation exchangers, such as evaporators or condensers, intended to be traversed by a refrigerant.

Landscapes

  • 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)
EP19910403441 1990-12-21 1991-12-18 Echangeur de chaleur, notamment pour véhicule automobile, et procédé pour sa fabrication Expired - Lifetime EP0493199B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9016168 1990-12-21
FR9016168A FR2670876A1 (fr) 1990-12-21 1990-12-21 Echangeur de chaleur, notamment pour vehicule automobile, et procede pour sa fabrication.

Publications (2)

Publication Number Publication Date
EP0493199A1 EP0493199A1 (fr) 1992-07-01
EP0493199B1 true EP0493199B1 (fr) 1995-01-18

Family

ID=9403586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910403441 Expired - Lifetime EP0493199B1 (fr) 1990-12-21 1991-12-18 Echangeur de chaleur, notamment pour véhicule automobile, et procédé pour sa fabrication

Country Status (4)

Country Link
EP (1) EP0493199B1 (enrdf_load_stackoverflow)
DE (1) DE69106860T2 (enrdf_load_stackoverflow)
ES (1) ES2069859T3 (enrdf_load_stackoverflow)
FR (1) FR2670876A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4336952B4 (de) * 1992-10-29 2005-11-24 Deutz Ag Motorölkühler für eine Hubkolbenbrennkraftmaschine
FR2770633B1 (fr) 1997-11-06 2000-01-07 Valeo Thermique Moteur Sa Dispositif a deux faisceaux d'echange de chaleur, notamment pour vehicule automobile
GB2530897B (en) * 2013-06-20 2016-11-02 Boustead Int Heaters Ltd Improvements in waste heat recovery units

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2267314A (en) * 1939-02-15 1941-12-23 B F Sturtevant Co Heat exchange unit
FR2341095A1 (fr) * 1976-02-10 1977-09-09 Hamon Dispositif de fixation etanche d'un tube dans une paroi d'une enceinte sous pression hydrostatique et son application a des batteries de tubes d'echange thermique
DE3126030C2 (de) * 1981-07-02 1983-04-14 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Rohrverbindung für einen Wärmetauscher mit einer Vielzahl einzelner miteinander zu verbindender Teile
FR2569459B1 (fr) * 1984-08-27 1986-11-21 Air Ind Assemblage etanche entre tube, coude tubulaire et bride metalliques pour installation thermo-electrique

Also Published As

Publication number Publication date
ES2069859T3 (es) 1995-05-16
DE69106860T2 (de) 1995-05-18
FR2670876B1 (enrdf_load_stackoverflow) 1993-02-26
FR2670876A1 (fr) 1992-06-26
DE69106860D1 (de) 1995-03-02
EP0493199A1 (fr) 1992-07-01

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