EP0647824A1 - Heat exchanger used more particularly as oil cooler - Google Patents

Heat exchanger used more particularly as oil cooler Download PDF

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Publication number
EP0647824A1
EP0647824A1 EP94202947A EP94202947A EP0647824A1 EP 0647824 A1 EP0647824 A1 EP 0647824A1 EP 94202947 A EP94202947 A EP 94202947A EP 94202947 A EP94202947 A EP 94202947A EP 0647824 A1 EP0647824 A1 EP 0647824A1
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EP
European Patent Office
Prior art keywords
heat exchanger
stack
flanges
exchanger according
flat tubes
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
EP94202947A
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German (de)
French (fr)
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EP0647824B1 (en
Inventor
Jean Louis Laveran
Gilles Caumel
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
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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.)
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Publication of EP0647824A1 publication Critical patent/EP0647824A1/en
Application granted granted Critical
Publication of EP0647824B1 publication Critical patent/EP0647824B1/en
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Expired - Lifetime 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
    • F28D1/03—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
    • F28D1/0308—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 the conduits being formed by paired plates touching each other
    • F28D1/0325—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 the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—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 the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core

Definitions

  • the invention relates to a heat exchanger which can be used in particular as an oil radiator for cooling the lubricating oil of a motor vehicle, in particular of a heavy vehicle.
  • the plates and the fins are usually joined together by brazing and there are further provided two housings fixed directly on an end plate to allow the entry and exit of the fluid to cool, usually oil.
  • Such a known heat exchanger is usually fixed to the vehicle by fixing means brazed to the flat tubes.
  • the object of the invention is in particular to overcome this drawback.
  • a heat exchanger of the aforementioned type which comprises an elongated cross member applied against a plate located at one end of the stack, provided with two passages communicating respectively with the two series of aligned openings and having a deformable shaped part expansion lyre to allow a change in its length, as well as two brackets at right angles to the crosspiece and bearing against the plate located at the other end of the stack.
  • the cross member and the two square flanges tightly surround the stack of flat tubes, whatever the temperatures of the fluid entering and leaving the heat exchanger.
  • the expansion lyre presented by the cross-member allows, by spring effect, to exert an excellent contact on the flat tubes in order to have a good brazing.
  • the cross member comprises a flat rectangular flange having a transverse U-shaped fold constituting the aforementioned expansion lyre.
  • the length of the flange can be modified, either in the direction of increase, or in the direction of decrease.
  • the cross member has two opposite lateral edges extending perpendicular to the plane of the flange and serving for fixing the two angle flanges.
  • the cross member further comprises at least one longitudinal edge extending perpendicular to the plane of the flange and serving for fixing the heat exchanger.
  • each square flange comprises a first branch extending parallel to the direction of the stack and bearing against the ends of the plates and a second branch extending parallel to the cross member and pressing against the plate located at the other end of the stack.
  • the square and the two flanges thus form a frame surrounding the stack of flat tubes.
  • the first branch of one of the flanges advantageously comprises a fixing wing folded at a right angle.
  • This wing can be used for fixing the heat exchanger in the motor vehicle.
  • the respective second branches of the two flanges terminate respectively in two adjacent oblique edges. Two independent flanges are thus produced for which the interval between the two adjacent oblique edges can vary.
  • the two respective branches of the two flanges are joined together by means of an expansion lyre.
  • the two flanges are integral with one another.
  • the heat exchanger comprises two housings attached to the cross member, respectively opposite the two passages and provided respectively with an inlet pipe and an outlet pipe for the fluid.
  • the two boxes can be provided beforehand on the cross member, which then facilitates the assembly of the cross member and the two flanges on the flat tubes.
  • the flat tubes, the fins, the cross member and the flanges are brazed together.
  • the heat exchanger of the invention comprises a multiplicity of flat tubes 10 arranged juxtaposed to form a stack in a stacking direction XX ( Figure 2).
  • Each of the flat tubes 10 is formed by two opposite elongated plates 12 delimiting between them a blade 14 for circulating a fluid, for example lubricating oil of an engine or oil of the gearbox of a motor vehicle, for example of a heavy vehicle.
  • Each of the blades 12 has a generally rectangular shape and has a peripheral edge 16 forming an assembly lip to allow the tight connection with a similar plate located opposite.
  • Each of the plates 12 has two bosses 18 and 20 provided respectively in two opposite regions of the plates, said regions being spaced apart in the longitudinal direction of the plates.
  • the bosses 18 and 20 constitute plate heads and are provided with an opening 22 and an opening 24 respectively.
  • each of the openings 22, as well as each of the openings 24, is a double opening but it could be a single opening.
  • the openings 22 are aligned with each other in the direction XX and allow the fluid to enter the blades 14. This fluid then leaves the blades 14 through the openings 24 which, too, are aligned with each other in the direction XX.
  • each of the blades 14 is placed a disturbing element 25 (shown only in FIG. 1) to disturb the flow of the fluid flowing in the blades and improve the heat exchange with the air.
  • the heat exchanger further comprises a multiplicity of corrugated fins 26 interposed between the flat tubes 10 and adapted to be swept by an air flow passing between the flat tubes 10.
  • the fins 26 have a generally rectangular shape and they are 'each extend between the bosses 18 and 20. They have substantially the same width as the tubes 10 but have a shorter length.
  • the heat exchanger as just described so far has a structure in itself known.
  • the plates 12 forming the flat tubes 10 and the fins 26 are assembled by brazing.
  • the heat exchanger comprises an elongated cross member 28 applied against that of the plates 12 located at the upper end of the stack.
  • the cross member 28 comprises a rectangular flange 30 of generally planar shape having substantially the same dimensions as the plate 12.
  • the rectangular flange 30 bears against the two bosses 18 and 20 of the corresponding plate 12.
  • the rectangular flange 30 has a transverse fold 32 with a U-shaped or omega-shaped section which constitutes a lyre of dilation allowing a modification of the length of the flange 30, either in the direction of increase, or in the direction of decrease.
  • each of the passages is formed by a double contour opening similar to that of the double openings 22 and 24, respectively.
  • the cross member 28 further comprises two opposite lateral edges 38 and 40 extending perpendicular to the plane of the flange 30 and serving respectively for the fixing of two flanges 42 and 44 in the form of brackets.
  • the cross member 28 further comprises a longitudinal edge 46 extending perpendicular to the plane of the flange 30 and used for fixing the heat exchanger.
  • the flange 46 has a buttonhole 48.
  • the cross member 28 also has a longitudinal flange 47 extending over part of the length of the flange.
  • the flange 42 comprises a first branch 50 extending parallel to the direction XX of the stack and coming to bear against the ends of the plates as well as a second branch 52 extending parallel to the flange 30 of the cross member and pressing against the plate 12 located at the other end of the stack.
  • the flange 44 comprises a first branch 54 extending parallel to the direction XX and coming to bear against the ends of the plates and a second branch 56 extending parallel to the flange 30 and pressing against the plate located at the other end, or lower end, of the stack.
  • the first branch of the flange 44 comprises a fixing wing 58 bent at a right angle and provided with two oblong holes 60.
  • the respective second branches 52 and 56 of the two flanges end respectively by two adjacent oblique edges 62 and 64 separated by a small interval.
  • This interval can increase or decrease according to the differences in expansion undergone by the flat tubes 10 as a function of the inlet and outlet temperatures of the fluid passing through them.
  • the two branches 52 and 56 could be joined together by a dilatation lyre similar to the lyre 32 described above.
  • the heat exchanger also comprises two housings 66 and 68 (FIG. 1) each formed from a stamped sheet metal and attached to the flange 30 of the cross member respectively opposite the two passages 34 and 36.
  • the housings 66 and 68 are provided respectively an inlet pipe 70 and an outlet pipe 72 for the fluid, for example oil, intended to be cooled.
  • the assembly constituted by the cross member 28 and the two flanges 42 and 44 constitutes a kind of frame which comes to tightly surround the stack of flat tubes 10 and fins 26, whatever the expansions undergone by the assembly in function differences in fluid temperature between the inlet and outlet of the heat exchanger.
  • the flat tubes 10 plates 12
  • the fins 26, the cross member 28 and the flanges 42 and 44 are advantageously joined together by brazing.
  • the heat exchanger of the invention is very particularly intended for the cooling of the lubricating oil of the engine or of the gearbox of a motor vehicle, in particular of a heavy vehicle.

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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)

Abstract

The invention relates to a heat exchanger. This exchanger comprises a multiplicity of flat tubes (10), arranged in a stack and each formed by two opposite elongate plates (12), a multiplicity of corrugated fins (26) interposed between the flat tubes, an elongate cross-piece (28) applied against a plate (12) located at one end of the stack, provided with two passages (34, 36) communicating with the flat tubes, and having an expansion-compensaton plate bend (32), as well as two right-angled flanges (42, 44), solidly attached to the cross-piece and bearing against the plate located at the other end of the stack. Application in particular to oil cooling radiators for motor vehicles. <IMAGE>

Description

L'invention concerne un échangeur de chaleur pouvant être utilisé notamment comme un radiateur d'huile pour le refroidissement de l'huile de lubrification d'un véhicule automobile, en particulier d'un poids lourd.The invention relates to a heat exchanger which can be used in particular as an oil radiator for cooling the lubricating oil of a motor vehicle, in particular of a heavy vehicle.

L'échangeur de chaleur de l'invention est du type comprenant :

  • une multiplicité de tubes plats disposés en pile et formés chacun de deux plaques allongées opposées délimitant entre elles une lame de circulation de fluide, les lames communiquant entre elles par deux séries d'ouvertures alignées dans la direction de la pile et prévues respectivement dans des régions opposées des plaques; et
  • une multiplicité d'ailettes ondulées intercalées entre les tubes plats et propres à être balayées par un flux d'air.
The heat exchanger of the invention is of the type comprising:
  • a multiplicity of flat tubes arranged in a stack and each formed of two opposite elongated plates delimiting between them a fluid circulation blade, the blades communicating with each other by two series of openings aligned in the direction of the stack and provided respectively in regions opposite plates; and
  • a multiplicity of corrugated fins interposed between the flat tubes and suitable for being swept by an air flow.

Lorsqu'un tel échangeur de chaleur est utilisé comme radiateur de refroidissement d'huile, l'huile circule à l'intérieur des lames délimitées par les tubes plats et elle est refroidie par le flux d'air balayant les ailettes placées entre les tubes plats.When such a heat exchanger is used as an oil cooling radiator, the oil circulates inside the blades delimited by the flat tubes and it is cooled by the air flow sweeping the fins placed between the flat tubes .

Dans les échangeurs de chaleur connus de ce type, les plaques et les ailettes sont habituellement réunies entre elles par brasage et l'on prévoit en outre deux boîtiers fixés directement sur une plaque d'extrémité pour permettre l'entrée et la sortie du fluide à refroidir, généralement de l'huile.In known heat exchangers of this type, the plates and the fins are usually joined together by brazing and there are further provided two housings fixed directly on an end plate to allow the entry and exit of the fluid to cool, usually oil.

Un tel échangeur de chaleur connu est habituellement fixé au véhicule par des moyens de fixation brasés sur les tubes plats.Such a known heat exchanger is usually fixed to the vehicle by fixing means brazed to the flat tubes.

Toutefois, ce mode de fixation se heurte à des difficultés pratiques du fait des différences de dilatation que subit l'échangeur de chaleur lors de son fonctionnement puisque le fluide à refroidir entre dans l'échangeur de chaleur à une température élevée et en ressort à une température plus basse.However, this method of fixation encounters practical difficulties due to the differences in expansion experienced the heat exchanger during its operation since the fluid to be cooled enters the heat exchanger at a high temperature and leaves it at a lower temperature.

L'invention a notamment pour but de surmonter cet inconvénient.The object of the invention is in particular to overcome this drawback.

Elle propose à cet effet un échangeur de chaleur du type précité qui comprend une traverse allongée appliquée contre une plaque située à une extrémité de la pile, munie de deux passages communiquant respectivement avec les deux séries d'ouvertures alignées et présentant une partie déformable en forme de lyre de dilatation propre à permettre une modification de sa longueur, ainsi que deux brides en équerre solidaires de la traverse et prenant appui contre la plaque située à l'autre extrémité de la pile.To this end, it offers a heat exchanger of the aforementioned type which comprises an elongated cross member applied against a plate located at one end of the stack, provided with two passages communicating respectively with the two series of aligned openings and having a deformable shaped part expansion lyre to allow a change in its length, as well as two brackets at right angles to the crosspiece and bearing against the plate located at the other end of the stack.

Ainsi, la traverse et les deux brides en équerre viennent ceinturer étroitement la pile de tubes plats, quelles que soient les températures du fluide à l'entrée et à la sortie de l'échangeur de chaleur.Thus, the cross member and the two square flanges tightly surround the stack of flat tubes, whatever the temperatures of the fluid entering and leaving the heat exchanger.

La lyre de dilatation que présente la traverse permet, par effet ressort, d'exercer un excellent contact sur les tubes plats afin d'avoir un bon brasage.The expansion lyre presented by the cross-member allows, by spring effect, to exert an excellent contact on the flat tubes in order to have a good brazing.

Cette lyre permet aussi à l'échangeur de chaleur de tenir aux chocs thermiques éventuels.This lyre also allows the heat exchanger to withstand possible thermal shocks.

Dans une forme de réalisation préférée de l'invention, la traverse comporte un flasque rectangulaire plan présentant un pli transversal en U constituant la lyre de dilatation précitée.In a preferred embodiment of the invention, the cross member comprises a flat rectangular flange having a transverse U-shaped fold constituting the aforementioned expansion lyre.

Du fait de l'existence de cette lyre de dilatation, la longueur du flasque peut être modifiée, soit dans le sens de l'accroissement, soit dans le sens de la diminution.Due to the existence of this expansion lyre, the length of the flange can be modified, either in the direction of increase, or in the direction of decrease.

Avantageusement, la traverse comporte deux bords latéraux opposés s'étendant perpendiculairement au plan du flasque et servant à la fixation des deux brides en équerre.Advantageously, the cross member has two opposite lateral edges extending perpendicular to the plane of the flange and serving for fixing the two angle flanges.

Selon une autre caractéristique de l'invention, la traverse comporte en outre au moins un rebord longitudinal s'étendant perpendiculairement au plan du flasque et servant à la fixation de l'échangeur de chaleur.According to another characteristic of the invention, the cross member further comprises at least one longitudinal edge extending perpendicular to the plane of the flange and serving for fixing the heat exchanger.

Avantageusement, chaque bride en équerre comprend une première branche s'étendant parallèlement à la direction de la pile et venant en appui contre les extrémités des plaques et une seconde branche s'étendant parallèlement à la traverse et s'appliquant contre la plaque située à l'autre extrémité de la pile. L'équerre et les deux brides forment ainsi un cadre entourant la pile des tubes plats.Advantageously, each square flange comprises a first branch extending parallel to the direction of the stack and bearing against the ends of the plates and a second branch extending parallel to the cross member and pressing against the plate located at the other end of the stack. The square and the two flanges thus form a frame surrounding the stack of flat tubes.

La première branche de l'une des brides comporte avantageusement une aile de fixation pliée à angle droit. Cette aile peut être utilisée pour la fixation de l'échangeur de chaleur dans le véhicule automobile.The first branch of one of the flanges advantageously comprises a fixing wing folded at a right angle. This wing can be used for fixing the heat exchanger in the motor vehicle.

Dans une forme de réalisation préférée de l'invention, les secondes branches respectives des deux brides se terminent respectivement par deux bords obliques adjacents. On réalise ainsi deux brides indépendantes pour lesquelles l'intervalle compris entre les deux bords obliques adjacents peut varier.In a preferred embodiment of the invention, the respective second branches of the two flanges terminate respectively in two adjacent oblique edges. Two independent flanges are thus produced for which the interval between the two adjacent oblique edges can vary.

Dans une autre forme de réalisation de l'invention, les deux branches respectives des deux brides sont réunies entre elles par l'intermédiaire d'une lyre de dilatation.In another embodiment of the invention, the two respective branches of the two flanges are joined together by means of an expansion lyre.

En ce cas, les deux brides sont solidaires l'une de l'autre.In this case, the two flanges are integral with one another.

Selon une autre caractéristique de l'invention, l'échangeur de chaleur comprend deux boîtiers rapportés sur la traverse, respectivement en regard des deux passages et munis respectivement d'une tubulure d'entrée et d'une tubulure de sortie du fluide.According to another characteristic of the invention, the heat exchanger comprises two housings attached to the cross member, respectively opposite the two passages and provided respectively with an inlet pipe and an outlet pipe for the fluid.

Il en résulte que les deux boîtiers peuvent être prévus au préalable sur la traverse, ce qui facilite ensuite l'assemblage de la traverse et des deux brides sur les tubes plats.As a result, the two boxes can be provided beforehand on the cross member, which then facilitates the assembly of the cross member and the two flanges on the flat tubes.

De façon avantageuse, les tubes plats, les ailettes, la traverse et les brides sont brasés ensemble.Advantageously, the flat tubes, the fins, the cross member and the flanges are brazed together.

Dans la description qui suit, faite seulement à titre d'exemple, on se réfère au dessin annexé, sur lequel :

  • la figure 1 est une vue partielle en perspective éclatée d'un échangeur de chaleur selon l'invention; et
  • la figure 2 est une vue en coupe partielle de l'échangeur de chaleur de la figure 1.
In the description which follows, given solely by way of example, reference is made to the appended drawing, in which:
  • Figure 1 is a partial exploded perspective view of a heat exchanger according to the invention; and
  • Figure 2 is a partial sectional view of the heat exchanger of Figure 1.

L'échangeur de chaleur de l'invention comprend une multiplicité de tubes plats 10 disposés de façon juxtaposée pour former une pile suivant une direction d'empilement XX (figure 2). Chacun des tubes plats 10 est formé de deux plaques allongées opposées 12 délimitant entre elles une lame 14 de circulation d'un fluide, par exemple de l'huile de lubrification d'un moteur ou de l'huile de la boîte de vitesses d'un véhicule automobile, par exemple d'un poids lourd.The heat exchanger of the invention comprises a multiplicity of flat tubes 10 arranged juxtaposed to form a stack in a stacking direction XX (Figure 2). Each of the flat tubes 10 is formed by two opposite elongated plates 12 delimiting between them a blade 14 for circulating a fluid, for example lubricating oil of an engine or oil of the gearbox of a motor vehicle, for example of a heavy vehicle.

Chacune des lames 12 présente une forme générale rectangulaire et comporte un bord périphérique 16 formant lèvre d'assemblage pour permettre la liaison étanche avec une plaque analogue située en vis-à-vis.Each of the blades 12 has a generally rectangular shape and has a peripheral edge 16 forming an assembly lip to allow the tight connection with a similar plate located opposite.

Chacune des plaques 12 comporte deux bossages 18 et 20 prévus respectivement dans deux régions opposées des plaques, lesdites régions étant éloignées dans le sens longitudinal des plaques.Each of the plates 12 has two bosses 18 and 20 provided respectively in two opposite regions of the plates, said regions being spaced apart in the longitudinal direction of the plates.

Les bossages 18 et 20 constituent des têtes de plaques et sont munis respectivement d'une ouverture 22 et d'une ouverture 24.The bosses 18 and 20 constitute plate heads and are provided with an opening 22 and an opening 24 respectively.

Dans l'exemple (figure 1), chacune des ouvertures 22, de même que chacune des ouvertures 24, est une ouverture double mais il pourrait s'agir d'une ouverture simple.In the example (Figure 1), each of the openings 22, as well as each of the openings 24, is a double opening but it could be a single opening.

Lorsque les plaques 12 sont disposées par paires pour former un tube plat 10 et que ces tubes sont ensuite superposés pour former une pile, les ouvertures 22 sont alignées entre elles dans la direction XX et permettent au fluide de pénétrer dans les lames 14. Ce fluide quitte ensuite les lames 14 par les ouvertures 24 qui, elles aussi, sont alignées entre elles dans la direction XX.When the plates 12 are arranged in pairs to form a flat tube 10 and these tubes are then superimposed to form a stack, the openings 22 are aligned with each other in the direction XX and allow the fluid to enter the blades 14. This fluid then leaves the blades 14 through the openings 24 which, too, are aligned with each other in the direction XX.

Dans chacune des lames 14 est placé un élément perturbateur 25 (représenté seulement à la figure 1) pour perturber l'écoulement du fluide s'écoulant dans les lames et améliorer l'échange thermique avec l'air.In each of the blades 14 is placed a disturbing element 25 (shown only in FIG. 1) to disturb the flow of the fluid flowing in the blades and improve the heat exchange with the air.

L'échangeur de chaleur comprend en outre une multiplicité d'ailettes ondulées 26 intercalées entre les tubes plats 10 et propres à être balayées par un flux d'air passant entre les tubes plats 10. Les ailettes 26 ont une forme générale rectangulaire et elles s'étendent chacune entre les bossages 18 et 20. Elles possèdent sensiblement la même largeur que les tubes 10 mais ont une longueur inférieure.The heat exchanger further comprises a multiplicity of corrugated fins 26 interposed between the flat tubes 10 and adapted to be swept by an air flow passing between the flat tubes 10. The fins 26 have a generally rectangular shape and they are 'each extend between the bosses 18 and 20. They have substantially the same width as the tubes 10 but have a shorter length.

L'échangeur de chaleur tel qu'il vient d'être décrit jusqu'à présent est d'une structure en elle-même connue. Les plaques 12 formant les tubes plats 10 et les ailettes 26 sont assemblées par brasage.The heat exchanger as just described so far has a structure in itself known. The plates 12 forming the flat tubes 10 and the fins 26 are assembled by brazing.

Conformément à l'invention, l'échangeur de chaleur comprend une traverse allongée 28 appliquée contre celle des plaques 12 située à l'extrémité supérieure de la pile. La traverse 28 comprend un flasque rectangulaire 30 de forme généralement plane ayant sensiblement les mêmes dimensions que la plaque 12. Le flasque rectangulaire 30 prend appui contre les deux bossages 18 et 20 de la plaque 12 correspondante. Le flasque rectangulaire 30 présente un pli transversal 32 à section en forme de U ou de oméga qui constitue une lyre de dilatation permettant une modification de la longueur du flasque 30, soit dans le sens de l'accroissement, soit dans le sens de la diminution.According to the invention, the heat exchanger comprises an elongated cross member 28 applied against that of the plates 12 located at the upper end of the stack. The cross member 28 comprises a rectangular flange 30 of generally planar shape having substantially the same dimensions as the plate 12. The rectangular flange 30 bears against the two bosses 18 and 20 of the corresponding plate 12. The rectangular flange 30 has a transverse fold 32 with a U-shaped or omega-shaped section which constitutes a lyre of dilation allowing a modification of the length of the flange 30, either in the direction of increase, or in the direction of decrease.

Dans le flasque 30 sont formés deux passages 34 et 36 communiquant respectivement avec les deux séries d'ouvertures alignées 22 et 24. Dans l'exemple, chacun des passages est formé d'une double ouverture de contour analogue à celle des doubles ouvertures 22 et 24, respectivement.In the flange 30 are formed two passages 34 and 36 communicating respectively with the two series of aligned openings 22 and 24. In the example, each of the passages is formed by a double contour opening similar to that of the double openings 22 and 24, respectively.

La traverse 28 comporte en outre deux rebords latéraux opposés 38 et 40 s'étendant perpendiculairement au plan du flasque 30 et servant respectivement à la fixation de deux brides 42 et 44 en forme d'équerres.The cross member 28 further comprises two opposite lateral edges 38 and 40 extending perpendicular to the plane of the flange 30 and serving respectively for the fixing of two flanges 42 and 44 in the form of brackets.

La traverse 28 comporte en outre un rebord longitudinal 46 s'étendant perpendiculairement au plan du flasque 30 et servant à la fixation de l'échangeur de chaleur. Dans l'exemple, le rebord 46 comporte une boutonnière 48. La traverse 28 comporte par ailleurs un rebord longitudinal 47 s étendant sur une partie de la longueur du flasque.The cross member 28 further comprises a longitudinal edge 46 extending perpendicular to the plane of the flange 30 and used for fixing the heat exchanger. In the example, the flange 46 has a buttonhole 48. The cross member 28 also has a longitudinal flange 47 extending over part of the length of the flange.

La bride 42 comprend une première branche 50 s'étendant parallèlement à la direction XX de la pile et venant en appui contre les extrémités des plaques ainsi qu'une seconde branche 52 s'étendant parallèlement au flasque 30 de la traverse et s'appliquant contre la plaque 12 située à l'autre extrémité de la pile. De même, la bride 44 comprend une première branche 54 s'étendant parallèlement à la direction XX et venant en appui contre les extrémités des plaques et une seconde branche 56 s'étendant parallèlement au flasque 30 et s'appliquant contre la plaque située à l'autre extrémité, ou extrémité inférieure, de la pile. Il en résulte que la traverse 28 et les deux brides 42 et 44 forment un cadre de contour général rectangulaire entourant la pile des tubes plats 12.The flange 42 comprises a first branch 50 extending parallel to the direction XX of the stack and coming to bear against the ends of the plates as well as a second branch 52 extending parallel to the flange 30 of the cross member and pressing against the plate 12 located at the other end of the stack. Similarly, the flange 44 comprises a first branch 54 extending parallel to the direction XX and coming to bear against the ends of the plates and a second branch 56 extending parallel to the flange 30 and pressing against the plate located at the other end, or lower end, of the stack. As a result, the cross-member 28 and the two flanges 42 and 44 form a framework of generally rectangular outline surrounding the stack of flat tubes 12.

La première branche de la bride 44 comporte une aile de fixation 58 pliée à angle droit et munie de deux trous oblongs 60.The first branch of the flange 44 comprises a fixing wing 58 bent at a right angle and provided with two oblong holes 60.

Comme on peut le voir sur la figure 1, les secondes branches respectives 52 et 56 des deux brides se terminent respectivement par deux bords obliques adjacents 62 et 64 séparés par un faible intervalle. Cet intervalle peut augmenter ou diminuer selon les différences de dilatation subies par les tubes plats 10 en fonction des températures d'entrée et de sortie du fluide qui les traverse.As can be seen in FIG. 1, the respective second branches 52 and 56 of the two flanges end respectively by two adjacent oblique edges 62 and 64 separated by a small interval. This interval can increase or decrease according to the differences in expansion undergone by the flat tubes 10 as a function of the inlet and outlet temperatures of the fluid passing through them.

Dans une variante, non représentée, les deux branches 52 et 56 pourraient être réunies entre elles par une lyre de dilatation analogue à la lyre 32 décrite précédemment.In a variant, not shown, the two branches 52 and 56 could be joined together by a dilatation lyre similar to the lyre 32 described above.

L'échangeur de chaleur comprend par ailleurs deux boîtiers 66 et 68 (figure 1) formés chacun d'une tôle emboutie et rapportés sur le flasque 30 de la traverse respectivement en regard des deux passages 34 et 36. Les boîtiers 66 et 68 sont munis respectivement d'une tubulure d'entrée 70 et d'une tubulure de sortie 72 pour le fluide, par exemple l'huile, destiné à être refroidi.The heat exchanger also comprises two housings 66 and 68 (FIG. 1) each formed from a stamped sheet metal and attached to the flange 30 of the cross member respectively opposite the two passages 34 and 36. The housings 66 and 68 are provided respectively an inlet pipe 70 and an outlet pipe 72 for the fluid, for example oil, intended to be cooled.

On comprendra que l'ensemble constitué par la traverse 28 et les deux brides 42 et 44 constitue une sorte de cadre qui vient ceinturer étroitement la pile des tubes plats 10 et des ailettes 26, quelles que soient les dilatations subies par l'ensemble en fonction des différences de température du fluide entre l'entrée et la sortie de l'échangeur de chaleur.It will be understood that the assembly constituted by the cross member 28 and the two flanges 42 and 44 constitutes a kind of frame which comes to tightly surround the stack of flat tubes 10 and fins 26, whatever the expansions undergone by the assembly in function differences in fluid temperature between the inlet and outlet of the heat exchanger.

Les tubes plats 10 (plaques 12), les ailettes 26, la traverse 28 et les brides 42 et 44 sont avantageusement réunies entre elles par brasage.The flat tubes 10 (plates 12), the fins 26, the cross member 28 and the flanges 42 and 44 are advantageously joined together by brazing.

L'échangeur de chaleur de l'invention est tout particulièrement destiné au refroidissement de l'huile de lubrification du moteur ou de la boîte de vitesses d'un véhicule automobile, notamment d'un poids lourd.The heat exchanger of the invention is very particularly intended for the cooling of the lubricating oil of the engine or of the gearbox of a motor vehicle, in particular of a heavy vehicle.

Claims (10)

Echangeur de chaleur comprendant : - une multiplicité de tubes plats (10) disposés en pile et formés chacun de deux plaques allongées opposées (12) délimitant entre elles une lame (14) de circulation de fluide, les lames (14) communiquant entre elles par deux séries d'ouvertures (22,24) alignées dans la direction (XX) de la pile et prévues respectivement dans des régions opposées (18,20) des plaques; et - une multiplicité d'ailettes ondulées (26) intercalées entre les tubes plats (10) et propres à être balayées par un flux d'air, caractérisé en ce qu'il comprend une traverse allongée (28) appliquée contre une plaque (12) située à une extrémité de la pile, munie de deux passages (34,36) communiquant respectivement avec les deux séries d'ouvertures alignées (22,24) et présentant une partie déformable en forme de lyre de dilatation (32) propre à permettre une modification de sa longueur, ainsi que deux brides (42,44) en forme d'équerres, solidaires de la traverse (28) et prenant appui contre la plaque (12) située à l'autre extrémité de la pile.Heat exchanger comprising: - A multiplicity of flat tubes (10) arranged in a stack and each formed of two opposite elongated plates (12) delimiting between them a blade (14) for circulation of fluid, the blades (14) communicating with each other by two series of openings (22,24) aligned in the direction (XX) of the stack and provided respectively in opposite regions (18,20) of the plates; and - a multiplicity of corrugated fins (26) interposed between the flat tubes (10) and suitable for being swept by an air flow, characterized in that it comprises an elongated crosspiece (28) applied against a plate (12) located at one end of the stack, provided with two passages (34,36) communicating respectively with the two series of aligned openings (22, 24) and having a deformable part in the form of a lyre for expansion (32) capable of allowing its length to be modified, as well as two flanges (42, 44) in the form of brackets, integral with the crosspiece (28) and bearing against the plate (12) located at the other end of the stack. Echangeur de chaleur selon la revendication 1, caractérisé en ce que la traverse (28) comporte un flasque rectangulaire (30) plan présentant un pli transversal en U constituant la lyre de dilatation (32).Heat exchanger according to claim 1, characterized in that the cross-member (28) comprises a rectangular rectangular flange (30) having a transverse U-shaped fold constituting the expansion lyre (32). Echangeur de chaleur selon la revendication 2, caractérisé en ce que la traverse (28) comporte deux rebords latéraux opposés (38,40) s'étendant perpendiculairement au plan du flasque (30) et servant à la fixation des deux brides (42,44).Heat exchanger according to claim 2, characterized in that the cross-member (28) has two opposite lateral flanges (38.40) extending perpendicular to the plane of the flange (30) and serving for fixing the two flanges (42.44 ). Echangeur de chaleur selon la revendication 3, caractérisé en ce que la traverse (28) comporte en outre au moins un bord longitudinal (46) s'étendant perpendiculairement au plan du flasque (30) et servant a la fixation de l'échangeur.Heat exchanger according to claim 3, characterized in that the crosspiece (28) further comprises at least one longitudinal edge (46) extending perpendicular to the plane of the flange (30) and serving for fixing the exchanger. Echangeur de chaleur selon l'une des revendications 1 à 4, caractérisé en ce que chaque bride (42,44) comprend une première branche (50,54) s'étendant parallèlement à la direction (XX) de la pile et venant en appui contre les extrémités des plaques (12) et une seconde branche (52,56) s'étendant parallèlement à la traverse (28) et s'appliquant contre la plaque (12) située à l'autre extrémité de la pile, la traverse (28) et les deux brides (42,44) formant un cadre entourant la pile des tubes plats (10).Heat exchanger according to one of claims 1 to 4, characterized in that each flange (42,44) comprises a first branch (50,54) extending parallel to the direction (XX) of the stack and coming to bear against the ends of the plates (12) and a second branch (52,56) extending parallel to the crosspiece (28) and pressing against the plate (12) located at the other end of the stack, the crosspiece ( 28) and the two flanges (42,44) forming a frame surrounding the stack of flat tubes (10). Echangeur de chaleur selon la revendication 5, caractérisé en ce que la première branche (54) de l'une (44) des brides en forme d'équerres comprend une aile de fixation (58) pliée à angle droit.Heat exchanger according to claim 5, characterized in that the first branch (54) of one (44) of the square-shaped flanges comprises a fixing wing (58) bent at right angles. Echangeur de chaleur selon l'une des revendications 5 et 6, caractérisé en ce que les secondes branches (52,56) des deux brides (42,44) se terminent respectivement par deux bords obliques adjacents (62,64).Heat exchanger according to one of claims 5 and 6, characterized in that the second branches (52,56) of the two flanges (42,44) end respectively by two adjacent oblique edges (62,64). Echangeur de chaleur selon l'une des revendications 5 et 6, caractérisé en ce que les deux branches respectives (52,56) des deux brides (42,44) sont réunies par l'intermédiaire d'une lyre de dilatation.Heat exchanger according to one of claims 5 and 6, characterized in that the two respective branches (52,56) of the two flanges (42,44) are joined by means of an expansion lyre. Echangeur de chaleur selon l'une des revendications 1 à 8, caractérisé en ce qu'il comprend deux boîtiers (66,68) rapportés sur la traverse (28), respectivement en regard des deux passages (34,36) et munis respectivement d'une tubulure d'entrée (70) et d'une tubulure de sortie (72) pour le fluide.Heat exchanger according to one of claims 1 to 8, characterized in that it comprises two housings (66,68) attached to the crossmember (28), respectively opposite the two passages (34,36) and provided respectively with an inlet manifold (70) and an outlet manifold (72) for the fluid. Echangeur de chaleur selon l'une des revendications 1 à 9, caractérisé en ce que les tubes plats (10), les ailettes (26), la traverse (28) et les brides (42,44) sont brasées.Heat exchanger according to one of claims 1 to 9, characterized in that the flat tubes (10), the fins (26), the crosspiece (28) and the flanges (42,44) are brazed.
EP19940202947 1993-10-11 1994-10-07 Heat exchanger used more particularly as oil cooler Expired - Lifetime EP0647824B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312078A FR2711235B1 (en) 1993-10-11 1993-10-11 Heat exchanger useful in particular as an oil radiator.
FR9312078 1993-10-11

Publications (2)

Publication Number Publication Date
EP0647824A1 true EP0647824A1 (en) 1995-04-12
EP0647824B1 EP0647824B1 (en) 1997-07-09

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Application Number Title Priority Date Filing Date
EP19940202947 Expired - Lifetime EP0647824B1 (en) 1993-10-11 1994-10-07 Heat exchanger used more particularly as oil cooler

Country Status (4)

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EP (1) EP0647824B1 (en)
DE (1) DE69404108T2 (en)
ES (1) ES2104264T3 (en)
FR (1) FR2711235B1 (en)

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Publication number Priority date Publication date Assignee Title
US6736193B2 (en) * 1998-11-10 2004-05-18 Valeo Thermique Moteur Side member for heat exchanger and heat exchanger incorporating side plate
CN100462660C (en) * 2005-02-22 2009-02-18 株式会社电装 Heat exchanger
US20130092360A1 (en) * 2010-03-31 2013-04-18 Valeo Systemes Thermiques Heat exchanger and sheet for the exchanger

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Publication number Priority date Publication date Assignee Title
DE10058710B4 (en) * 1999-12-17 2011-01-27 Behr Gmbh & Co. Kg Heat exchanger, in particular for motor vehicles
JP2002147973A (en) * 2000-08-30 2002-05-22 Denso Corp Duplex heat exchanger
DE102004013399A1 (en) * 2004-01-22 2005-10-06 Behr Gmbh & Co. Kg Frame part for a tube heat exchanger
DE102009012784A1 (en) * 2009-03-13 2010-09-16 Behr Gmbh & Co. Kg Heat exchanger
FR2977307B1 (en) 2011-06-30 2013-08-09 Valeo Systemes Thermiques STACKED PLATE EXCHANGER HOUSING AND EXCHANGER COMPRISING SUCH A HOUSING

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US4403648A (en) * 1979-06-11 1983-09-13 Caterpillar Tractor Co. Engine radiator support and guard assembly
EP0266108A1 (en) * 1986-10-21 1988-05-04 Austin Rover Group Limited A heat exchanger
FR2627579A1 (en) * 1988-02-23 1989-08-25 Valeo Chausson Thermique HEAT EXCHANGER, ESPECIALLY COOLING RADIATOR, ESPECIALLY FOR A MOTOR VEHICLE
FR2631108A1 (en) * 1988-05-04 1989-11-10 Valeo Chausson Thermique Heat exchanger, in particular cooling radiator for motor vehicle

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US4403648A (en) * 1979-06-11 1983-09-13 Caterpillar Tractor Co. Engine radiator support and guard assembly
EP0266108A1 (en) * 1986-10-21 1988-05-04 Austin Rover Group Limited A heat exchanger
FR2627579A1 (en) * 1988-02-23 1989-08-25 Valeo Chausson Thermique HEAT EXCHANGER, ESPECIALLY COOLING RADIATOR, ESPECIALLY FOR A MOTOR VEHICLE
FR2631108A1 (en) * 1988-05-04 1989-11-10 Valeo Chausson Thermique Heat exchanger, in particular cooling radiator for motor vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6736193B2 (en) * 1998-11-10 2004-05-18 Valeo Thermique Moteur Side member for heat exchanger and heat exchanger incorporating side plate
CN100462660C (en) * 2005-02-22 2009-02-18 株式会社电装 Heat exchanger
US20130092360A1 (en) * 2010-03-31 2013-04-18 Valeo Systemes Thermiques Heat exchanger and sheet for the exchanger
US9797663B2 (en) * 2010-03-31 2017-10-24 Valeo Systemes Thermiques Heat exchanger and sheet for the exchanger

Also Published As

Publication number Publication date
FR2711235B1 (en) 1996-01-19
DE69404108T2 (en) 1997-10-30
FR2711235A1 (en) 1995-04-21
EP0647824B1 (en) 1997-07-09
ES2104264T3 (en) 1997-10-01
DE69404108D1 (en) 1997-08-14

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