EP0692692A1 - Rohr mit länglichem Querschnitt für Wärmetauscher - Google Patents

Rohr mit länglichem Querschnitt für Wärmetauscher Download PDF

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Publication number
EP0692692A1
EP0692692A1 EP95110946A EP95110946A EP0692692A1 EP 0692692 A1 EP0692692 A1 EP 0692692A1 EP 95110946 A EP95110946 A EP 95110946A EP 95110946 A EP95110946 A EP 95110946A EP 0692692 A1 EP0692692 A1 EP 0692692A1
Authority
EP
European Patent Office
Prior art keywords
tube
hole
section
holes
cross
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.)
Withdrawn
Application number
EP95110946A
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English (en)
French (fr)
Inventor
Michel Potier
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 Moteur SA
Original Assignee
Valeo Thermique Moteur SA
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 Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP0692692A1 publication Critical patent/EP0692692A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements

Definitions

  • the invention relates to a tube with an oblong cross section for a heat exchanger, in particular for a motor vehicle.
  • It also relates to a heat exchanger comprising a multiplicity of fins traversed by such tubes to form a bundle.
  • the invention relates more particularly to a tube for a heat exchanger, suitable for passing through a multiplicity of fins by holes which the latter have and for then being applied under pressure against the edges of the holes by deformation of its wall, each hole having a oblong cross section such that the edge of the hole has longitudinal parts facing each other which are curved and have their convexity facing the inside of the hole.
  • a heat exchanger is produced starting from a plurality of tubes having such an oblong cross section and a multiplicity of fins having in alignment oblong holes having the shape defined above.
  • the tubes are then threaded into the aligned holes of the fins and then the tubes are deformed by expansion or expansion so as to apply them under pressure against the edges of the holes which are generally surrounded by collars.
  • the clearance between the edge of the fin hole and the tube (at the rounded parts of the tube) is greater than the minimum clearance required for threading the tube through the aligned holes of the fins.
  • This necking can generate the bursting of the tube during the flaring of its ends after assembly of the collectors or plates with holes which are usually provided at the ends of the bundle to receive water boxes.
  • the object of the invention is in particular to overcome such drawbacks.
  • a tube for heat exchanger of the type defined above, which tube has, before deformation, a cross section having a shape substantially homologous to that of the hole and comprising two longitudinal sides facing each other which are curved and have their convexity turned towards the inside of the tube, so that the tube has a restricted external width in a region where the longitudinal sides are closest to each other.
  • the cross section of the tube, before deformation is substantially homologous to that of the fin hole and has a similar shape with curved longitudinal sides having a curvature in the same direction as that of the longitudinal parts of the edges of the holes.
  • the clearance between the fin hole and the tube in particular at the level of the rounded parts and with a small radius of curvature of the tube, may be small, that is to say equal to the minimum clearance necessary for threading the tube through the holes in the fins.
  • the tube When the tube is then deformed by expansion or expansion, it undergoes a narrow necking, in particular at its rounded ends with a small radius of curvature, which avoids any risk of subsequent bursting of the tube.
  • the cross section of the tube before deformation and the cross section of the hole are chosen such that there is a play of substantially constant thickness between the edge of the hole and the tube before deformation, and this over the entire periphery of the tube.
  • This play of substantially constant thickness then corresponds to the minimum play necessary for threading the tube into the aligned holes of the fins.
  • the two curved longitudinal sides of the tube are connected together by two rounded parts of substantially circular shape and of selected radius.
  • This radius of the rounded ends is chosen such that the relation l ⁇ 2r is verified, where l represents the restricted external width of the tube before deformation and r the radius of the rounded parts.
  • This characteristic makes it possible to optimize the clearance between the tube and the fin hole and thus to reduce the expansion force and the necking of the tube.
  • the radius r of the rounded ends is such that the relation r ⁇ 4e is verified, where e denotes the thickness of the wall of the tube before deformation.
  • This second characteristic is the necessary condition for the tube with longitudinal sides curved inwards to have a higher coefficient of convection than that of an oval section tube having a minimum radius r.
  • the invention in another aspect, relates to a heat exchanger which comprises a multiplicity of fins having holes of oblong cross section such that the edge of the hole has longitudinal parts facing each other, which are curved and have their convexity facing the inside of the hole, as well as at least one tube as defined above, the wall of which has been deformed under pressure so as to be applied against the edges of the holes.
  • FIG. 1 shows part of a fin 10 of generally rectangular shape which comprises a multiplicity of holes 12 which, in the example, are arranged in a single row.
  • Each of the holes 12 has an oblong cross section such that the edge of the hole has two longitudinal parts 14 located opposite one another, which are curved and have their convexity facing the inside of the hole.
  • the two longitudinal parts 14 are connected by two end parts 16 of rounded shape which have a radius of curvature R of chosen value.
  • the hole 12 thus has, in the region where the two longitudinal parts 14 are closest to each other, a restricted internal width L which is less than 2R.
  • the hole 12 is bordered, over its entire periphery, by a collar 18 of the same shape.
  • FIG. 2 represents a tube 20 according to the invention, before deformation.
  • the tube 20 has an oblong cross section of shape substantially homologous to that of the hole 12, but of smaller dimension to allow the threading of the tube 20, before deformation, through the aligned holes of a multiplicity of fins 10 arranged parallel between they.
  • the tube 20 is formed from a deformable metal or metal alloy and it has two longitudinal sides 22, arranged opposite one another, which are curved and have their convexity turned towards the inside of the tube.
  • the longitudinal sides 22 have a curvature in the same direction as the longitudinal parts 14 of the hole 12.
  • the two sides 22 are connected together by two curved parts 24 of circular shape having a radius of curvature r which is less than R.
  • the tube 20 has a restricted external width l such that l ⁇ 2r.
  • the tube 20 has a deformable wall 26 having a substantially constant thickness e.
  • the cross section of the hole 12 and the cross section of the tube 20 are homologous and chosen so that there is a clearance j of substantially constant thickness between the edge of the hole 12 and the tube 20 before deformation, and this over the entire periphery of the tube.
  • the tube 20 According to a first characteristic of the tube 20, it satisfies the relation l ⁇ 2r, which makes it possible to optimize the clearance j between the tube and the fin hole and to reduce the expansion force and the necking of the tube during its subsequent deformation.
  • the tube 20 also satisfies the relation r ⁇ 4e, where e denotes, as already indicated, the thickness of the wall 26 of the tube before deformation.
  • This second characteristic is a necessary condition for the tube to have a higher convection coefficient than that of an oval tube of minimum radius r.
  • FIGS. 4 and 5 describe the process for manufacturing a heat exchanger according to the invention.
  • the tube 20 is then threaded through the aligned holes 12 of the fins, by axial displacement of the tube in the direction of alignment of the holes. Then, the tube 20 is deformed by expansion or expansion, for example by means of a tool of the "olive" type (not shown) introduced axially into the tube.
  • the tube is thus applied under pressure against the edges of the holes and against the collars of the holes.
  • the tube is deformed uniformly over its entire periphery, as shown diagrammatically by the arrows in FIG. 4.
  • the wall 26 of the tube thus comes to apply tightly against the collars of the fins to ensure the assembly of the tube with the fins and at the same time a good thermal bond between them.
  • the invention is particularly suitable for producing heat exchangers for motor vehicles, in particular engine cooling radiators or radiators for heating the passenger compartment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP95110946A 1994-07-15 1995-07-12 Rohr mit länglichem Querschnitt für Wärmetauscher Withdrawn EP0692692A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9408819 1994-07-15
FR9408819A FR2722563B1 (fr) 1994-07-15 1994-07-15 Tube a section transversale oblongue pour echangeur de chaleur

Publications (1)

Publication Number Publication Date
EP0692692A1 true EP0692692A1 (de) 1996-01-17

Family

ID=9465447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110946A Withdrawn EP0692692A1 (de) 1994-07-15 1995-07-12 Rohr mit länglichem Querschnitt für Wärmetauscher

Country Status (3)

Country Link
EP (1) EP0692692A1 (de)
BR (1) BR9503317A (de)
FR (1) FR2722563B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2906355A1 (fr) * 2006-09-21 2008-03-28 Valeo Systemes Thermiques Tube pour echangeur de chaleur,echangeur comportant un tel tube et procede de fabrication d'un tel tube
FR2909912A1 (fr) * 2006-12-14 2008-06-20 Valeo Systemes Thermiques Procede de realisation d'une ailette pour echangeur de chaleur, ailette obtenue par un tel procede et echangeur de chaleur comportant une telle ailette
WO2013068488A1 (fr) * 2011-11-10 2013-05-16 Valeo Systemes Thermiques Procede de fabrication d'un echangeur de chaleur et echangeur de chaleur obtenu par ledit procede, olive et dispositif d'expansion de tubes pour la mise en oeuvre dudit procede
CN104534897A (zh) * 2014-12-29 2015-04-22 浙江华森散热器制造有限公司 胀管式汽车散热器
CN104864761A (zh) * 2015-06-10 2015-08-26 纳百川控股有限公司 热交换器管道及热交换器
EP2927632A1 (de) * 2014-04-04 2015-10-07 MAHLE International GmbH Wärmetauscher
DE102017202475A1 (de) 2017-02-16 2018-08-16 Mahle International Gmbh Im Querschnitt knochenförmiges Wärmeübertragerrohr

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866948B1 (fr) 2004-02-27 2017-11-24 Valeo Thermique Moteur Sa Echangeur de chaleur a deflecteur de flux ameliore
FR3037388B1 (fr) 2015-06-12 2019-07-26 Valeo Systemes Thermiques Ailette d'un echangeur thermique notamment pour vehicule automobile, et echangeur thermique correspondant

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1502301A (en) * 1922-09-06 1924-07-22 Fedders Mfg Co Inc Radiator
DE2030063A1 (de) * 1969-06-18 1971-01-07 S A. des Usmes Chausson, Asnieres, Hauts-de Seine (Frankreich) Kuhlrohrbundel und Verfahren zu dessen Herstellung
FR2380088A1 (fr) * 1977-02-10 1978-09-08 Thermal Waerme Kaelte Klima Procede et dispositif pour fabriquer un echangeur de chaleur a lamelles et applications
FR2402850A1 (fr) 1977-09-09 1979-04-06 Ferodo Sa Dispositif de tube a ailettes pour echangeur de chaleur, notamment pour radiateur de vehicule automobile, et son procede de fabrication
FR2475709A1 (fr) * 1980-02-08 1981-08-14 Chausson Usines Sa Tube pour echangeur de chaleur et echangeur a plaque collectrice et a assemblage mecanique comportant ce tube
US4327800A (en) * 1979-09-24 1982-05-04 Caterpillar Tractor Co. Method of manufacturing heat exchanger core and assembly therefor
DE4343731A1 (de) * 1992-12-24 1994-06-30 Vaillant Joh Gmbh & Co Verfahren zum Fügen eines Rohres

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1502301A (en) * 1922-09-06 1924-07-22 Fedders Mfg Co Inc Radiator
DE2030063A1 (de) * 1969-06-18 1971-01-07 S A. des Usmes Chausson, Asnieres, Hauts-de Seine (Frankreich) Kuhlrohrbundel und Verfahren zu dessen Herstellung
FR2380088A1 (fr) * 1977-02-10 1978-09-08 Thermal Waerme Kaelte Klima Procede et dispositif pour fabriquer un echangeur de chaleur a lamelles et applications
FR2402850A1 (fr) 1977-09-09 1979-04-06 Ferodo Sa Dispositif de tube a ailettes pour echangeur de chaleur, notamment pour radiateur de vehicule automobile, et son procede de fabrication
US4327800A (en) * 1979-09-24 1982-05-04 Caterpillar Tractor Co. Method of manufacturing heat exchanger core and assembly therefor
FR2475709A1 (fr) * 1980-02-08 1981-08-14 Chausson Usines Sa Tube pour echangeur de chaleur et echangeur a plaque collectrice et a assemblage mecanique comportant ce tube
DE4343731A1 (de) * 1992-12-24 1994-06-30 Vaillant Joh Gmbh & Co Verfahren zum Fügen eines Rohres

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2906355A1 (fr) * 2006-09-21 2008-03-28 Valeo Systemes Thermiques Tube pour echangeur de chaleur,echangeur comportant un tel tube et procede de fabrication d'un tel tube
FR2909912A1 (fr) * 2006-12-14 2008-06-20 Valeo Systemes Thermiques Procede de realisation d'une ailette pour echangeur de chaleur, ailette obtenue par un tel procede et echangeur de chaleur comportant une telle ailette
WO2013068488A1 (fr) * 2011-11-10 2013-05-16 Valeo Systemes Thermiques Procede de fabrication d'un echangeur de chaleur et echangeur de chaleur obtenu par ledit procede, olive et dispositif d'expansion de tubes pour la mise en oeuvre dudit procede
FR2982663A1 (fr) * 2011-11-10 2013-05-17 Valeo Systemes Thermiques Procede de fabrication d'un echangeur de chaleur et echangeur de chaleur obtenu par ledit procede, olive et dispositif d'expansion de tubes pour la mise en oeuvre dudit procede
CN104080556A (zh) * 2011-11-10 2014-10-01 法雷奥热***公司 用于制造热交换器的方法和通过所述方法获得的热交换器，用于执行所述方法的型模和管道扩张装置
US9669455B2 (en) 2011-11-10 2017-06-06 Valeo Systemes Thermiques Method for producing a heat exchanger and heat exchanger obtained by said method, swage and tube expansion device for implementing said method
EP2927632A1 (de) * 2014-04-04 2015-10-07 MAHLE International GmbH Wärmetauscher
DE102014206612A1 (de) * 2014-04-04 2015-10-29 Mahle International Gmbh Wärmetauscher
US10401097B2 (en) 2014-04-04 2019-09-03 Mahle International Gmbh Heat exchanger
CN104534897A (zh) * 2014-12-29 2015-04-22 浙江华森散热器制造有限公司 胀管式汽车散热器
CN104864761A (zh) * 2015-06-10 2015-08-26 纳百川控股有限公司 热交换器管道及热交换器
DE102017202475A1 (de) 2017-02-16 2018-08-16 Mahle International Gmbh Im Querschnitt knochenförmiges Wärmeübertragerrohr

Also Published As

Publication number Publication date
BR9503317A (pt) 1996-07-09
FR2722563B1 (fr) 1996-09-06
FR2722563A1 (fr) 1996-01-19

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