EP1055897B1 - Echangeur de chaleur muni de positionnement d'ailettes perfectionné - Google Patents

Echangeur de chaleur muni de positionnement d'ailettes perfectionné Download PDF

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Publication number
EP1055897B1
EP1055897B1 EP20000401350 EP00401350A EP1055897B1 EP 1055897 B1 EP1055897 B1 EP 1055897B1 EP 20000401350 EP20000401350 EP 20000401350 EP 00401350 A EP00401350 A EP 00401350A EP 1055897 B1 EP1055897 B1 EP 1055897B1
Authority
EP
European Patent Office
Prior art keywords
fins
fin
heat exchanger
less
openings
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
EP20000401350
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1055897A1 (fr
Inventor
Philippe Lemercier
Guy Lenormand
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 EP1055897A1 publication Critical patent/EP1055897A1/fr
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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
    • F28F1/10—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means

Definitions

  • the invention relates to a heat exchanger, in particular for motor vehicle. It relates more particularly to a heat exchanger intended to cooperate with an air flow which crosses it, so as to modify the temperature of this flow.
  • such a heat exchanger comprises a series heat conducting fins, in order to increase its cooperation with the aforementioned air flow.
  • Such fins have a generally substantially planar shape, and are substantially parallel and spaced apart. Otherwise, they are each provided with openings for the passage of tubes intended to convey a clean fluid to exchange the heat with the air flow.
  • the fins are successively stacked the on top of each other.
  • a sliding of one of the fins relative to the others can happen.
  • the openings of this fin are then, at less partly, obscured by the other fins, which makes the subsequent step of inserting the tubes delicate in the openings.
  • Document JP-57-181917 shows such a construction.
  • the present invention improves the situation.
  • each fin has at least one protrusion projecting from a first side, and at least one recess on a second side opposite to the first face, so that the protuberance of a fin is able to cooperate by interlocking with the recess a consecutive fin, which allows positioning substantially the fins relative to each other of so that the openings for the passage of the tubes substantially coincide between two consecutive fins.
  • the fins are made of a material substantially deformable metal and each have at minus a pin forming both the protuberance and the recess supra.
  • these pins are of substantially shaped conical, with the top of the cone turned towards a fin consecutive.
  • these pins have substantially a shape of punctured dome with three sides, each forming a substantially angle less than 90 ° with the aforementioned first side of a fin.
  • each fin comprises at least two recesses and at least two protuberances suitable for engaging in the recesses of a consecutive fin, in view to immobilize the fins appreciably, one with respect to to others.
  • each fin further comprises a plurality spacers, intended to rest on one of the first and second faces of a consecutive fin, in view to keep the fins substantially spaced apart by compared to others, and the spacing stops are high substantially less than a height of the protrusions of positioning.
  • the aforementioned tubes are substantially in contact with the openings of the fins, in order to mechanically stiffen the assembly formed by the fins and the tubes.
  • FIG. 1 we first refer to Figure 1 to describe a heat exchanger according to the invention, intended to cool a fluid thanks to an air flow (arrow F) which crosses it.
  • this heat exchanger is part the cooling module of a motor vehicle engine, as a cooling radiator.
  • the exchanger comprises flat tubes 1 arranged in bundles and intended to convey a heat exchange fluid (liquid cooling) of one of the manifolds 4a that includes the heat exchanger, at the other 4b.
  • the extremities tubes are housed, preferably sealed, in openings in the collector plates 3a and 3b, integral with the manifolds 4a and 4b. Tubes 1 which coolant co-operate by exchange thermal with the air flow F, in order to cool said cooling liquid.
  • the heat exchanger has then fins 2, of generally substantially planar shape and substantially parallel to each other. These fins 2 are made of a heat conductive material (comprising aluminum) in order to increase the surface heat exchange with the air flow F which enters the exchanger, which increases, in general, the cooperation between flow F and the exchanger.
  • the conductive fins have spacing means so as to create gaps between the fins, which allows to leave penetrate the air flow F into the exchanger and avoid heat accumulation points.
  • the fins 2 are substantially perpendicular to the main axes of the tubes 1, and then comprise openings 21 for the passage of the tubes 1.
  • the fins 2 are stacked on top of each other.
  • the tubes 1, preferably produced in a deformable material are introduced into the openings 21 stacked fins 2, with a chosen mechanical play.
  • a stage of expansion of the tubes 1 is then provided, which mechanically stiffens the fins relative to to the tubes, creating in particular a mechanical contact substantially annular between the outer walls of the tubes and the openings 21 of the fins.
  • these fins remain substantially aligned, so that their openings 21 coincide from one fin to the other, which makes it possible to introduce easily the tubes 1 in the openings 21 of the fins consecutive.
  • the openings 21 of these fins must coincide, moreover, with the openings provided in the header plates 3a and 3b.
  • the fins of the heat exchanger comprise means for positioning the consecutive fins, so that the fins stacked successively remain substantially aligned with each other, which allows their openings to substantially coincide respective 21.
  • Fin 2a has openings, substantially in the form of louvers 221 and 222, so as to allow lateral penetration of a part of the air flow F, in order to increase cooperation of the air flow F with the exchanger.
  • Each fin further includes spacing means 23 with a fin consecutive. These spacing means are formed, in the example described, of stops 23 provided with two walls 231 and 232, forming an angle close to 90 ° with a main surface S of the fin (first side mentioned above).
  • fins 2 are made of a metallic material deformable, for example in aluminum and the walls 231 and 232 spacing are obtained by punching on one side of the fins opposite side S (second side mentioned above).
  • the height of walls 231 and 232 defines a general pitch p between consecutive fins (aforementioned interstices).
  • the openings 21 of the fins are substantially oblong, particularly suitable for tubes 1, flat in the example described.
  • the walls of the openings 21 are intended to be substantially in contact with the tubes.
  • the openings 21 of a fin 2b substantially coincide with the openings 21 of a consecutive wing 2a.
  • This coincidence of openings is ensured by means of positioning which comprise the fins of the heat exchanger according to the invention.
  • These positioning means are produced in the form of a substantially conical pin, in particular frustoconical, performed, for example, by punching a bottom face fin 2a.
  • the protuberance formed by punching has a general shape of a punctured dome three sides 241, 242 and 243, these sides forming an angle less than 90 ° with the main surface S of the fin.
  • the spacing walls 231 and 232 are substantially curved laterally at their ends and thus have a shape general of collar. Furthermore, the height h of the spike positioning 24 is greater than the height p of the stop of spacing 23. Thus, the sides 241, 242 and 243 of a fin 2b fit into the recess that forms the punching of positioning of a consecutive fin 2a, while the spacing walls 231 and 232 come into contact with the main surface of the consecutive fin 2a.
  • each fin has two pins of positioning 24a and 24b ( Figure 3), which allows to immobilize the fins appreciably, one with respect to to others.
  • the fins can be substantially immobilized in relation to each other in progress stacking, which facilitates the introduction of the tubes into the openings 21.
  • the two positioning pins 24a and 24b also allow to index the fins, in relation to each other, in the case (not shown) where these do not present any double axial symmetry.
  • positioning means 24 described above can form both means of positioning and spacing means between the fins.
  • These positioning means are produced by punching the fins.
  • these may include a protuberance formed on one side, as well as a recess formed on the other side. If it is particularly desired to train a heat exchanger with tubes inclined at an angle different from 90 ° to the fins, it can be envisaged to shift, in the plane of a fin, the recess of the protuberance it entails.
  • positioning protrusions produced by punching and having three sides (or lips) 241, 242 and 243 is described above by way of example. So general, positioning punches may be provided substantially of frustoconical or conical shapes, with the top of the cone turned towards a consecutive fin.
  • the invention advantageously applies to an exchanger heat produced by mechanical assembly of flat tubes and substantially planar shaped fins, substantially perpendicular to the tubes.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP20000401350 1999-05-27 2000-05-17 Echangeur de chaleur muni de positionnement d'ailettes perfectionné Expired - Lifetime EP1055897B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9906718A FR2794226B1 (fr) 1999-05-27 1999-05-27 Echangeur de chaleur, notamment pour vehicule automobile, muni de positionnement d'ailettes perfectionne
FR9906718 1999-05-27

Publications (2)

Publication Number Publication Date
EP1055897A1 EP1055897A1 (fr) 2000-11-29
EP1055897B1 true EP1055897B1 (fr) 2004-03-17

Family

ID=9546074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000401350 Expired - Lifetime EP1055897B1 (fr) 1999-05-27 2000-05-17 Echangeur de chaleur muni de positionnement d'ailettes perfectionné

Country Status (4)

Country Link
EP (1) EP1055897B1 (es)
DE (1) DE60008963T2 (es)
ES (1) ES2219276T3 (es)
FR (1) FR2794226B1 (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7128136B2 (en) 1998-08-10 2006-10-31 Gregory Christian T Radial flow heat exchanger
AU2002259108A1 (en) * 2002-05-01 2003-11-17 Christian T. Gregory Radial flow heat exchanger
FR2866698B1 (fr) * 2004-02-24 2017-11-24 Valeo Thermique Moteur Sa Echangeur de chaleur a ailettes avec pattes d'espacement
US20110030932A1 (en) * 2009-08-07 2011-02-10 Johnson Controls Technology Company Multichannel heat exchanger fins
CA3036460A1 (en) 2018-03-14 2019-09-14 Rheem Manufacturing Company Heat exchanger fin
USD906268S1 (en) 2018-09-11 2020-12-29 Rheem Manufacturing Company Heat exchanger fin

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE435225A (es) *
BE348128A (es) *
DE2613747B2 (de) * 1976-03-31 1979-08-23 Volkswagenwerk Ag, 3180 Wolfsburg Röhrenwärmetauscher
JPS57181917A (en) * 1981-04-30 1982-11-09 Toyota Motor Corp Plate-fin radiator
EP0086559A3 (en) * 1982-02-16 1984-01-11 Unipart Group Limited Improvements relating to heat exchangers
DE29719639U1 (de) * 1997-11-05 1998-12-03 Fritz Eichenauer Gmbh & Co Kg, 76870 Kandel Vorrichtung zum Beheizen von Innenräumen, insbesondere von Kraftfahrzeugen

Also Published As

Publication number Publication date
ES2219276T3 (es) 2004-12-01
FR2794226B1 (fr) 2001-07-27
FR2794226A1 (fr) 2000-12-01
DE60008963T2 (de) 2004-08-12
EP1055897A1 (fr) 2000-11-29
DE60008963D1 (de) 2004-04-22

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