EP0791797A1 - Heat exchanger with brazed waterbox, in particular for automotive vehicle - Google Patents

Heat exchanger with brazed waterbox, in particular for automotive vehicle Download PDF

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Publication number
EP0791797A1
EP0791797A1 EP97102248A EP97102248A EP0791797A1 EP 0791797 A1 EP0791797 A1 EP 0791797A1 EP 97102248 A EP97102248 A EP 97102248A EP 97102248 A EP97102248 A EP 97102248A EP 0791797 A1 EP0791797 A1 EP 0791797A1
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EP
European Patent Office
Prior art keywords
heat exchanger
fluid box
exchanger according
projections
collector plate
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Withdrawn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
EP97102248A
Other languages
German (de)
French (fr)
Inventor
Jacques Hoffnung
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 EP0791797A1 publication Critical patent/EP0791797A1/en
Withdrawn legal-status Critical Current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
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • 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
    • F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
    • F28F9/268—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/08—Reinforcing means for header boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

Definitions

  • the invention relates to a heat exchanger with a brazed fluid box, in particular for a motor vehicle.
  • a heat exchanger of the type comprising a collecting plate provided with a bottom suitable for being connected to a bundle of tubes, as well as a fluid box terminated by a peripheral edge suitable for engaging in a peripheral rim of the header plate for their connection by brazing.
  • brazing is generally provided by a thin plating provided on the manifold plate and / or the fluid box, it is necessary that the edge of the fluid box and the edge of the manifold plate are in surface contact over the entire periphery.
  • the collector plate is provided with a deep-drawn groove in which the edge of the fluid box is engaged.
  • This solution facilitates obtaining a reduced clearance suitable for guaranteeing a tight brazing between the fluid box and the manifold plate, and this whatever the deformations presented by the fluid box before its introduction into the manifold plate, or whatever that the deformations caused by heating up to the brazing temperature are.
  • Another known solution consists in using a collecting plate in the form of a bowl in which the edge of the fluid box is engaged.
  • this solution does not guarantee the maintenance of a tight brazing game between the edge of the fluid box and the edge of the manifold plate.
  • a heat exchanger of a different type that is to say with mechanical assembly, in which projections are provided on a collecting plate to guide the edge of a water box so that it comes to compress the edge of a sealing body, without this sealing body being able to be damaged.
  • the protrusions here are intended to guide the edge of the water box so that it comes to compress the edge of the sealing body, in the region where the edge of the sealing body is located, that is to say in a peripheral groove of the collector plate.
  • the object of the invention is in particular to overcome the aforementioned drawbacks.
  • each stamped projection comprises at least one generator which extends in a direction substantially parallel to the peripheral rim of the collector plate and which is located at a distance therefrom, substantially equal, by greater value, than the thickness of the peripheral edge of the fluid box.
  • each stamped projection is produced in the form of a spike of generally circular cylindrical shape with parallel generatrices.
  • each projection is produced in the form of a dome.
  • the invention applies in particular to a heat exchanger of the type defined above, in which the bottom of the collector plate comprises a multiplicity of holes each surrounded by an internal boss for the reception of one end of the tube.
  • the projections are then advantageously provided between two adjacent internal bosses.
  • the bottom of the collector plate of such a heat exchanger usually comprises external bosses each disposed between two adjacent internal bosses.
  • the projections are then advantageously each located in the axis of an external boss.
  • the invention applies in particular to a heat exchanger in which the collector plate has a substantially rectangular shape and is delimited by two longitudinal sides and two transverse sides.
  • the projections are advantageously provided along the longitudinal sides. It is generally not necessary to provide protrusions along the transverse sides.
  • the rim of the manifold plate has one end which is crimped locally against the fluid box to provide temporary support for soldering.
  • the manifold plate and the fluid box are both formed of aluminum or aluminum alloy.
  • FIG. 1 partially represents, in top view, a collecting plate 10 intended to form part of a heat exchanger according to the invention.
  • the collector plate 10 is made of a metallic material, for example aluminum or an aluminum alloy.
  • the collecting plate 10 has a bowl-type shape and it comprises a generally flat bottom 12, of rectangular shape, bordered by a peripheral rim 14, which comprises two longitudinal sides 16 parallel to one another and two transverse sides 18, parallel to each other, of which only one is visible in FIG. 1.
  • the sides 16 and 18 are interconnected by rounded parts 20 in the form of quarter circles.
  • the collector plate 10 comprises a tab 22 which extends beyond one of the transverse sides 18 to serve, for example, as a retaining tab.
  • each of the holes 24 is bordered by an internal boss 30 of shape homologous to that of the hole and projecting from the side of the peripheral rim 14, as can be seen in FIGS. 2 to 4. In other words, each of the bosses 30 is arranged with the side of the fluid box, which will be discussed later.
  • the presence of the internal bosses 30 facilitates better surface contact between the collector plate 10 and the tubes 28 with a view to their connection by brazing.
  • the bottom 12 of the collector plate 10 further comprises external bosses 31 (FIGS. 1 to 4) each disposed between two adjacent internal bosses 30.
  • the external bosses 31 are oblong in shape and are directed on the side opposite to the fluid box. Their main function is to strengthen the bottom of the collecting plate.
  • the bottom 12 of the collector plate comprises a multiplicity of stamped projections 32 arranged in two lines parallel respectively to the two longitudinal sides 16 of the peripheral rim 14 (FIG. 1).
  • each of the projections 32 forms a boss which extends on the same side as the flange 14, that is to say on the side of the boss 30, therefore on the side opposite to the boss 31.
  • each of the projections 32 has the shape of a substantially hemispherical dome.
  • Each of the projections 32 is arranged between two adjacent internal bosses 30 and in the axis of an external boss 31.
  • each projection 32 (FIG. 1) is located at a determined distance d from the peripheral rim 14, that is to say with respect to the internal face of a longitudinal side 16.
  • the fluid box 38 is made of metallic material, advantageously of aluminum or of aluminum alloy, and it comprises a wall 40 provided with reinforcing ribs 42, in the shape of a U, as shown in FIGS. 2 and 3.
  • the wall 40 is connected to the peripheral edge 36 via a shoulder 44 ( Figures 3 and 4).
  • the peripheral edge 36 has a rectangular outline with rounded corners which corresponds to that of the peripheral edge 14 of the collector plate, with a view to their fitting together, as shown in Figures 3 and 4.
  • the heat exchanger of the invention is manufactured as follows.
  • the tubes 28 and their spacers are first assembled with the collecting plate 10. Then, the fluid box 38 is assembled with the collecting plate 10.
  • peripheral edge 36 of the fluid box is introduced into the peripheral rim 14 of the manifold plate. Because the edge 36 and the rim 14 have homologous shapes, they fit closely together.
  • the edge 36 of the manifold is guided by the projections 32, which ensures close contact between the edge 36 and the flange 14 for their subsequent connection by soldering.
  • the flange 14 is locally deformed at its end (FIG. 4) to form crimping points which bear against the shoulder 44. These crimps are made of place in place on the perimeter, preferably only at the two longitudinal sides.
  • the brazing is carried out by passing the heat exchanger through a suitable furnace which causes the brazing alloy which has been previously plated on the constituent elements of the heat exchanger to melt.
  • the heat exchanger of Figures 5 and 6 is similar to that of Figures 1 to 4, except as regards the shape of the stamped projections formed in the bottom of the collector plate.
  • each projection 34 comprises stamped projections 34 placed in the same places as the projections 32 of the shape of previous achievement.
  • these projections 34 are each produced in the form of a spike of generally circular cylindrical shape with parallel generatrices.
  • each projection 34 comprises at least one generator G (FIG. 6) extending in a direction substantially parallel to the peripheral rim 14 of the collector plate and located at a distance d from the latter which corresponds to the distance d from the Figure 1. In other words, this distance is substantially equal, by greater value, to the thickness of the peripheral edge 36 of the fluid box.
  • the invention applies very particularly to the production of heat exchangers which can be used as cooling radiators for motor vehicles.

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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)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

The fluid chamber (10) consists of a base (12) with apertures for tubes (28), and a cover (38) which is brazed to the raised edge (14) of the base. The base is made with a series of stamped projections (32) along each side, designed to hold the cover in place against its raised edges prior to brazing. Each of the stamped projections has a generating surface which lies parallel to the raised edge of the base, and is set at a distance from it which is equal to or slightly greater than the thickness of the cover. The projections can be made in the shape of cylindrical studs or domes. Both base and cover are made from aluminium or an aluminium-based alloy.

Description

L'invention concerne un échangeur de chaleur à boîte à fluide brasée, en particulier pour véhicule automobile.The invention relates to a heat exchanger with a brazed fluid box, in particular for a motor vehicle.

Elle concerne plus particulièrement un échangeur de chaleur du type comprenant une plaque collectrice munie d'un fond propre à être relié à un faisceau de tubes, ainsi qu'une boîte à fluide terminée par un bord périphérique propre à s'engager dans un rebord périphérique de la plaque collectrice en vue de leur liaison par brasage.It relates more particularly to a heat exchanger of the type comprising a collecting plate provided with a bottom suitable for being connected to a bundle of tubes, as well as a fluid box terminated by a peripheral edge suitable for engaging in a peripheral rim of the header plate for their connection by brazing.

On connaît déjà de nombreux échangeurs de chaleur de ce type, dont les éléments constitutifs sont réalisés habituellement en aluminium ou en alliage à base d'aluminium et sont assemblés ensemble par brasage par cuisson dans un four approprié.Numerous heat exchangers of this type are already known, the constituent elements of which are usually made of aluminum or an aluminum-based alloy and are assembled together by brazing by baking in a suitable oven.

L'un des problèmes posés par la fabrication de tels échangeurs de chaleur est celui de réaliser un contact étroit entre le bord de la boîte à fluide et le rebord de la plaque collectrice pour permettre une liaison étanche par brasage, sans risques de création de fuites.One of the problems posed by the manufacture of such heat exchangers is that of making a close contact between the edge of the fluid box and the edge of the manifold plate to allow a tight connection by soldering, without risk of creating leaks. .

Comme le brasage est apporté généralement par un placage de fine épaisseur prévu sur la plaque collectrice et/ou la boîte à fluide, il est nécessaire que le bord de la boîte à fluide et le rebord de la plaque collectrice soient en contact surfacique sur toute la périphérie.As brazing is generally provided by a thin plating provided on the manifold plate and / or the fluid box, it is necessary that the edge of the fluid box and the edge of the manifold plate are in surface contact over the entire periphery.

Conformément à une solution connue, la plaque collectrice est munie d'une gorge emboutie dans laquelle est engagé le bord de la boîte à fluide. Cette solution facilite l'obtention d'un jeu réduit propre à garantir un brasage étanche entre la boîte à fluide et la plaque collectrice, et cela quelles que soient les déformations présentées par la boîte à fluide avant son introduction dans la plaque collectrice, ou quelles que soient les déformations provoquées par l'échauffement jusqu'à la température de brasage.According to a known solution, the collector plate is provided with a deep-drawn groove in which the edge of the fluid box is engaged. This solution facilitates obtaining a reduced clearance suitable for guaranteeing a tight brazing between the fluid box and the manifold plate, and this whatever the deformations presented by the fluid box before its introduction into the manifold plate, or whatever that the deformations caused by heating up to the brazing temperature are.

L'un des inconvénients de cette solution connue réside dans la difficulté d'emboutir une gorge suffisamment étroite pour maintenir correctement le bord de la boîte à fluide et dans l'encombrement que présente la plaque collectrice, tant dans le sens de la profondeur que dans celui de la hauteur.One of the drawbacks of this known solution lies in the difficulty of stamping a groove which is sufficiently narrow to correctly maintain the edge of the fluid box and in the space which the collecting plate presents, both in the direction of the depth and in that of height.

Une autre solution connue consiste à utiliser une plaque collectrice en forme de cuvette dans laquelle est engagé le bord de la boîte à fluide. Toutefois, cette solution ne permet pas de garantir le maintien d'un jeu de brasage étroit entre le bord de la boîte à fluide et le rebord de la plaque collectrice.Another known solution consists in using a collecting plate in the form of a bowl in which the edge of the fluid box is engaged. However, this solution does not guarantee the maintenance of a tight brazing game between the edge of the fluid box and the edge of the manifold plate.

Par ailleurs, on connaît, d'après FR-A-2 712 384, un échangeur de chaleur d'un type différent, c'est-à-dire à assemblage mécanique, dans lequel on prévoit des saillies sur une plaque collectrice pour guider le bord d'une boîte à eau afin que celui-ci vienne comprimer le bord d'un corps d'étanchéité, sans que ce corps d'étanchéité puisse être endommagé. Les saillies ont ici pour but de guider le bord de la boîte à eau pour qu'il vienne comprimer le bord du corps d'étanchéité, dans la région où se trouve le bord du corps d'étanchéité, c'est-à-dire dans une rainure périphérique de la plaque collectrice.Furthermore, there is known, from FR-A-2 712 384, a heat exchanger of a different type, that is to say with mechanical assembly, in which projections are provided on a collecting plate to guide the edge of a water box so that it comes to compress the edge of a sealing body, without this sealing body being able to be damaged. The protrusions here are intended to guide the edge of the water box so that it comes to compress the edge of the sealing body, in the region where the edge of the sealing body is located, that is to say in a peripheral groove of the collector plate.

L'invention a notamment pour but de surmonter les inconvénients précités.The object of the invention is in particular to overcome the aforementioned drawbacks.

Elle propose en conséquence un échangeur de chaleur du type défini en introduction, dans lequel le fond comporte une multiplicité de saillies embouties disposées de façon espacée et à proximité du rebord périphérique pour assurer le maintien en contact du bord périphérique de la boîte à fluide contre le rebord périphérique de la plaque collectrice en vue de leur liaison par brasage.It therefore proposes a heat exchanger of the type defined in the introduction, in which the bottom comprises a multiplicity of stamped projections arranged in a spaced apart manner and close to the peripheral rim to ensure the contact in contact with the peripheral edge of the fluid box against the peripheral rim of the collector plate for their connection by brazing.

Ainsi, lorsque le bord périphérique de la boîte à fluide est engagé par emboîtement dans le rebord périphérique de la plaque collectrice, ce bord périphérique est guidé et maintenu en contact contre le rebord de la plaque collectrice, ce qui permet de réaliser un pré-assemblage entre la plaque collectrice et la boîte à fluide.Thus, when the peripheral edge of the fluid box is engaged by fitting into the peripheral rim of the collector plate, this peripheral edge is guided and kept in contact against the rim of the collector plate, which makes it possible to carry out a pre-assembly between the manifold plate and the fluid box.

Il en résulte un contact surfacique étroit entre ce bord et ce rebord sur toute leur périphérie, ce qui permet ensuite une liaison étanche par brasage.This results in close surface contact between this edge and this flange over their entire periphery, which then allows a tight connection by brazing.

Dans une forme de réalisation de l'invention, chaque saillie emboutie comporte au moins une génératrice qui s'étend dans une direction sensiblement parallèle au rebord périphérique de la plaque collectrice et qui est située à une distance de celle-ci, sensiblement égale, par valeur supérieure, à l'épaisseur du bord périphérique de la boîte à fluide.In one embodiment of the invention, each stamped projection comprises at least one generator which extends in a direction substantially parallel to the peripheral rim of the collector plate and which is located at a distance therefrom, substantially equal, by greater value, than the thickness of the peripheral edge of the fluid box.

La présence de telles génératrices facilite la mise en contact du bord périphérique de la boîte à fluide avec le rebord périphérique de la plaque collectrice.The presence of such generators makes it easier to bring the peripheral edge of the fluid box into contact with the peripheral edge of the collector plate.

Dans une forme de réalisation préférée de l'invention, chaque saillie emboutie est réalisée sous la forme d'un picot de forme générale cylindrique circulaire à génératrices parallèles.In a preferred embodiment of the invention, each stamped projection is produced in the form of a spike of generally circular cylindrical shape with parallel generatrices.

Dans une autre forme de réalisation de l'invention, chaque saillie est réalisée sous la forme d'un dôme.In another embodiment of the invention, each projection is produced in the form of a dome.

L'invention s'applique en particulier à un échangeur de chaleur du type défini précédemment, dans lequel le fond de la plaque collectrice comprend une multiplicité de trous entourés chacun par un bossage interne pour la réception d'une extrémité de tube.The invention applies in particular to a heat exchanger of the type defined above, in which the bottom of the collector plate comprises a multiplicity of holes each surrounded by an internal boss for the reception of one end of the tube.

Conformément à l'invention, les saillies sont alors avantageusement prévues entre deux bossages internes adjacents.According to the invention, the projections are then advantageously provided between two adjacent internal bosses.

Le fond de la plaque collectrice d'un tel échangeur de chaleur comprend habituellement des bossages externes disposés chacun entre deux bossages internes adjacents.The bottom of the collector plate of such a heat exchanger usually comprises external bosses each disposed between two adjacent internal bosses.

Conformément à l'invention, les saillies sont alors avantageusement situées chacune dans l'axe d'un bossage externe.According to the invention, the projections are then advantageously each located in the axis of an external boss.

L'invention s'applique en particulier à un échangeur de chaleur dans lequel la plaque collectrice a une forme sensiblement rectangulaire et est délimitée par deux côtés longitudinaux et deux côtés transversaux.The invention applies in particular to a heat exchanger in which the collector plate has a substantially rectangular shape and is delimited by two longitudinal sides and two transverse sides.

En pareil cas, les saillies sont avantageusement prévues le long des côtés longitudinaux. Il n'est généralement pas nécessaire de prévoir de saillies le long des côtés transversaux.In such cases, the projections are advantageously provided along the longitudinal sides. It is generally not necessary to provide protrusions along the transverse sides.

Selon une autre caractéristique de l'invention, le rebord de la plaque collectrice comporte une extrémité qui est sertie localement contre la boîte à fluide pour assurer un maintien provisoire en vue du brasage.According to another characteristic of the invention, the rim of the manifold plate has one end which is crimped locally against the fluid box to provide temporary support for soldering.

Dans une forme de réalisation préférée de l'invention, la plaque collectrice et la boîte à fluide sont toutes deux formées en aluminium ou en alliage d'aluminium.In a preferred embodiment of the invention, the manifold plate and the fluid box are both formed of aluminum or aluminum alloy.

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 de dessus d'une plaque collectrice d'un échangeur de chaleur selon l'invention, avant assemblage avec une boîte à fluide;
  • la figure 2 est une vue partielle en coupe selon la ligne II-II de la figure 1;
  • la figure 3 est une vue en coupe selon la ligne III-III de la figure 1 après assemblage de la plaque collectrice avec une boîte à fluide et avec un faisceau de tubes;
  • la figure 4 est un détail de la figure 3; et
  • les figures 5 et 6 sont des vues analogues à celles des figures 3 et 4, pour une autre forme de réalisation des saillies embouties.
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 top view of a header plate of a heat exchanger according to the invention, before assembly with a fluid box;
  • Figure 2 is a partial sectional view along the line II-II of Figure 1;
  • Figure 3 is a sectional view along line III-III of Figure 1 after assembly of the manifold plate with a fluid box and with a bundle of tubes;
  • Figure 4 is a detail of Figure 3; and
  • Figures 5 and 6 are views similar to those of Figures 3 and 4, for another embodiment of the stamped projections.

On se réfère tout d'abord à la figure 1 qui représente partiellement, en vue de dessus, une plaque collectrice 10 destinée à faire partie d'un échangeur de chaleur selon l'invention. La plaque collectrice 10 est réalisée en une matière métallique, par exemple en aluminium ou en alliage d'aluminium. La plaque collectrice 10 a une forme de type cuvette et elle comprend un fond 12 généralement plat, de forme rectangulaire, bordé par un rebord périphérique 14, lequel comprend deux côtés longitudinaux 16 parallèles entre eux et deux côtés transversaux 18, parallèles entre eux, dont un seul est visible sur la figure 1. Les côtés 16 et 18 sont reliés entre eux par des parties arrondies 20 en forme de quarts de cercle. Par ailleurs, la plaque collectrice 10 comprend une patte 22 qui s'étend au-delà d'un des côtés transversaux 18 pour servir par exemple de patte de maintien.Firstly reference is made to FIG. 1 which partially represents, in top view, a collecting plate 10 intended to form part of a heat exchanger according to the invention. The collector plate 10 is made of a metallic material, for example aluminum or an aluminum alloy. The collecting plate 10 has a bowl-type shape and it comprises a generally flat bottom 12, of rectangular shape, bordered by a peripheral rim 14, which comprises two longitudinal sides 16 parallel to one another and two transverse sides 18, parallel to each other, of which only one is visible in FIG. 1. The sides 16 and 18 are interconnected by rounded parts 20 in the form of quarter circles. Furthermore, the collector plate 10 comprises a tab 22 which extends beyond one of the transverse sides 18 to serve, for example, as a retaining tab.

Dans le fond 12 de la plaque collectrice (figures 1 et 2) est ménagée une rangée de trous 24 de forme oblongue et destinés à recevoir chacun une extrémité 26 d'un tube 28 (figures 3 et 4) faisant partie d'un faisceau de tubes parallèles. Dans l'exemple, les tubes 28 sont des tubes plats entre lesquels sont disposés des intercalaires ondulés (non représentés) formant ailettes. Chacun des trous 24 est bordé par un bossage interne 30 de forme homologue de celle du trou et faisant saillie du côté du rebord périphérique 14, comme on peut le voir sur les figures 2 à 4. Autrement dit, chacun des bossages 30 est disposé du côté de la boîte à fluide, dont il sera question ultérieurement.In the bottom 12 of the collector plate (Figures 1 and 2) is formed a row of holes 24 of oblong shape and intended to each receive one end 26 of a tube 28 (Figures 3 and 4) forming part of a bundle of parallel tubes. In the example, the tubes 28 are flat tubes between which are arranged corrugated inserts (not shown) forming fins. Each of the holes 24 is bordered by an internal boss 30 of shape homologous to that of the hole and projecting from the side of the peripheral rim 14, as can be seen in FIGS. 2 to 4. In other words, each of the bosses 30 is arranged with the side of the fluid box, which will be discussed later.

La présence des bossages internes 30 facilite un meilleur contact surfacique entre la plaque collectrice 10 et les tubes 28 en vue de leur liaison par brasage.The presence of the internal bosses 30 facilitates better surface contact between the collector plate 10 and the tubes 28 with a view to their connection by brazing.

Le fond 12 de la plaque collectrice 10 comporte en outre des bossages externes 31 (figures 1 à 4) disposés chacun entre deux bossages internes 30 adjacents. Les bossages externes 31 sont de forme oblongue et sont dirigés du côté opposé à la boîte à fluide. Ils ont essentiellement pour fonction de renforcer le fond de la plaque collectrice.The bottom 12 of the collector plate 10 further comprises external bosses 31 (FIGS. 1 to 4) each disposed between two adjacent internal bosses 30. The external bosses 31 are oblong in shape and are directed on the side opposite to the fluid box. Their main function is to strengthen the bottom of the collecting plate.

Le fond 12 de la plaque collectrice comprend une multiplicité de saillies embouties 32 disposées suivant deux lignes parallèles respectivement aux deux côtés longitudinaux 16 du rebord périphérique 14 (figure 1).The bottom 12 of the collector plate comprises a multiplicity of stamped projections 32 arranged in two lines parallel respectively to the two longitudinal sides 16 of the peripheral rim 14 (FIG. 1).

Comme on le voit mieux sur les figures 3 et 4, chacune des saillies 32 forme un bossage qui s'étend du même côté que le rebord 14, c'est-à-dire du côté du bossage 30, donc du côté opposé au bossage 31. Dans la forme de réalisation des figures 1 à 4, chacune des saillies 32 a la forme d'un dôme sensiblement hémisphérique.As best seen in Figures 3 and 4, each of the projections 32 forms a boss which extends on the same side as the flange 14, that is to say on the side of the boss 30, therefore on the side opposite to the boss 31. In the embodiment of FIGS. 1 to 4, each of the projections 32 has the shape of a substantially hemispherical dome.

Chacune des saillies 32 est disposée entre deux bossages internes adjacents 30 et dans l'axe d'un bossage externe 31.Each of the projections 32 is arranged between two adjacent internal bosses 30 and in the axis of an external boss 31.

La base du dôme de chaque saillie 32 (figure 1) se situe à une distance d déterminée du rebord périphérique 14, c'est-à-dire par rapport à la face interne d'un côté longitudinal 16.The base of the dome of each projection 32 (FIG. 1) is located at a determined distance d from the peripheral rim 14, that is to say with respect to the internal face of a longitudinal side 16.

Cette distance d est sensiblement égale, par valeur supérieure, à l'épaisseur du bord périphérique 36 d'une boîte à fluide 38 destinée à être assemblée à la plaque collectrice 10 par brasage. La boîte à fluide 38 est réalisée en matière métallique, avantageusement en aluminium ou en alliage d'aluminium, et elle comprend une paroi 40 munie de nervures de renforcement 42, en forme de U, comme montré aux figures 2 et 3. La paroi 40 se raccorde au bord périphérique 36 par l'intermédiaire d'un épaulement 44 (figures 3 et 4).This distance d is substantially equal, by greater value, to the thickness of the peripheral edge 36 of a fluid box 38 intended to be assembled to the collecting plate 10 by brazing. The fluid box 38 is made of metallic material, advantageously of aluminum or of aluminum alloy, and it comprises a wall 40 provided with reinforcing ribs 42, in the shape of a U, as shown in FIGS. 2 and 3. The wall 40 is connected to the peripheral edge 36 via a shoulder 44 (Figures 3 and 4).

Le bord périphérique 36 a un contour rectangulaire avec des coins arrondis qui correspond à celui du bord périphérique 14 de la plaque collectrice, en vue de leur assemblage par emboîtement, comme montré aux figures 3 et 4.The peripheral edge 36 has a rectangular outline with rounded corners which corresponds to that of the peripheral edge 14 of the collector plate, with a view to their fitting together, as shown in Figures 3 and 4.

L'échangeur de chaleur de l'invention est fabriqué comme suit.The heat exchanger of the invention is manufactured as follows.

On assemble d'abord les tubes 28 et leurs intercalaires (non représentés) avec la plaque collectrice 10. Ensuite, on assemble la boîte à fluide 38 avec la plaque collectrice 10.The tubes 28 and their spacers (not shown) are first assembled with the collecting plate 10. Then, the fluid box 38 is assembled with the collecting plate 10.

Pour cela, on introduit le bord périphérique 36 de la boîte à fluide dans le rebord périphérique 14 de la plaque collectrice. Du fait que le bord 36 et le rebord 14 ont des formes homologues, ils s'emboîtent étroitement l'un dans l'autre.For this, the peripheral edge 36 of the fluid box is introduced into the peripheral rim 14 of the manifold plate. Because the edge 36 and the rim 14 have homologous shapes, they fit closely together.

En fin d'emboîtement, le bord 36 de la boîte collectrice est guidé par les saillies 32, ce qui assure un contact étroit entre le bord 36 et le rebord 14 en vue de leur liaison ultérieure par brasage. Pour permettre un maintien provisoire de la plaque collectrice et de la boîte à fluide, le rebord 14 est déformé localement à son extrémité (figure 4) pour former des points de sertissage qui viennent en appui contre l'épaulement 44. Ces sertissages sont réalisés de place en place sur le pourtour, de préférence uniquement au niveau des deux côtés longitudinaux.At the end of nesting, the edge 36 of the manifold is guided by the projections 32, which ensures close contact between the edge 36 and the flange 14 for their subsequent connection by soldering. To allow temporary retention of the manifold plate and of the fluid box, the flange 14 is locally deformed at its end (FIG. 4) to form crimping points which bear against the shoulder 44. These crimps are made of place in place on the perimeter, preferably only at the two longitudinal sides.

Ensuite, on procède au brasage en passant l'échangeur de chaleur dans un four approprié qui provoque la fusion de l'alliage de brasure qui a été au préalable plaqué sur les éléments constitutifs de l'échangeur de chaleur.Then, the brazing is carried out by passing the heat exchanger through a suitable furnace which causes the brazing alloy which has been previously plated on the constituent elements of the heat exchanger to melt.

L'échangeur de chaleur des figures 5 et 6 est semblable à celui des figures 1 à 4, sauf en ce qui concerne la forme des saillies embouties formées dans le fond de la plaque collectrice.The heat exchanger of Figures 5 and 6 is similar to that of Figures 1 to 4, except as regards the shape of the stamped projections formed in the bottom of the collector plate.

En effet, le fond 12 comporte ici des saillies embouties 34 placées aux mêmes endroits que les saillies 32 de la forme de réalisation précédente. Toutefois, ces saillies 34 sont réalisées chacune sous la forme d'un picot de forme générale cylindrique circulaire à génératrices parallèles. En outre, chaque saillie 34 comporte au moins une génératrice G (figure 6) s'étendant dans une direction sensiblement parallèle au rebord périphérique 14 de la plaque collectrice et située à une distance d de celle-ci qui correspond à la distance d de la figure 1. Autrement dit, cette distance est sensiblement égale, par valeur supérieure, à l'épaisseur du bord périphérique 36 de la boîte à fluide.Indeed, the bottom 12 here comprises stamped projections 34 placed in the same places as the projections 32 of the shape of previous achievement. However, these projections 34 are each produced in the form of a spike of generally circular cylindrical shape with parallel generatrices. In addition, each projection 34 comprises at least one generator G (FIG. 6) extending in a direction substantially parallel to the peripheral rim 14 of the collector plate and located at a distance d from the latter which corresponds to the distance d from the Figure 1. In other words, this distance is substantially equal, by greater value, to the thickness of the peripheral edge 36 of the fluid box.

Bien entendu, l'invention n'est pas limitée aux formes de réalisation décrites précédemment à titre d'exemple et s'étend à d'autres variantes.Of course, the invention is not limited to the embodiments described above by way of example and extends to other variants.

Ainsi, il est possible de concevoir des saillies embouties de configurations différentes, du moment qu'elles permettent un guidage du bord périphérique de la boîte à fluide en vue d'un contact étroit avec le rebord périphérique de la plaque collectrice.Thus, it is possible to design stamped projections of different configurations, as long as they allow guiding of the peripheral edge of the fluid box for close contact with the peripheral edge of the manifold plate.

Il est possible également de prévoir des saillies le long des côtés transversaux de la plaque collectrice, notamment s'il s'agit d'une plaque collectrice de plus grande largeur.It is also possible to provide projections along the transverse sides of the collector plate, in particular if it is a collector plate of greater width.

L'invention s'applique tout particulièrement à la réalisation d'échangeurs de chaleur pouvant être utilisés comme radiateurs de refroidissement pour véhicules automobiles.The invention applies very particularly to the production of heat exchangers which can be used as cooling radiators for motor vehicles.

Claims (9)

Echangeur de chaleur du type comprenant une plaque collectrice (10) munie d'un fond (12) propre à être relié à un faisceau de tubes (28), ainsi qu'une boîte à fluide (38) terminée par un rebord périphérique (36) propre à s'engager dans un rebord périphérique (14) de la plaque collectrice (10) en vue de leur liaison par brasage,
caractérisé en ce que le fond (12) comporte une multiplicité de saillies embouties (32; 34) disposées de façon espacée et à proximité du rebord périphérique (14) pour assurer le maintien en contact du bord périphérique (36) de la boîte à fluide (38) contre le rebord périphérique (14) de la plaque collectrice (10) en vue de leur liaison par brasage.Heat exchanger of the type comprising a collecting plate (10) provided with a bottom (12) suitable for being connected to a bundle of tubes (28), as well as a fluid box (38) terminated by a peripheral rim (36 ) suitable for engaging in a peripheral rim (14) of the collector plate (10) for their connection by brazing,
characterized in that the bottom (12) comprises a multiplicity of stamped projections (32; 34) arranged in a spaced manner and close to the peripheral rim (14) to ensure that the peripheral edge (36) of the fluid box is kept in contact (38) against the peripheral rim (14) of the collector plate (10) for their connection by brazing. Echangeur de chaleur selon la revendication 1, caractérisé en ce que chaque saillie emboutie (34) comporte au moins une génératrice (G) s'étendant dans une direction sensiblement parallèle au rebord périphérique (14) de la plaque collectrice (10) et située à une distance (d) de celle-ci qui est sensiblement égale, par valeur supérieure, à l'épaisseur du bord périphérique (36) de la boîte à fluide (38).Heat exchanger according to claim 1, characterized in that each stamped projection (34) comprises at least one generator (G) extending in a direction substantially parallel to the peripheral rim (14) of the collector plate (10) and located at a distance (d) from this which is substantially equal, by greater value, to the thickness of the peripheral edge (36) of the fluid box (38). Echangeur de chaleur selon la revendication 2, caractérisé en ce que chaque saillie emboutie (34) est un picot de forme générale cylindrique circulaire à génératrices parallèles (G).Heat exchanger according to claim 2, characterized in that each stamped projection (34) is a generally cylindrical circular pin with parallel generators (G). Echangeur de chaleur selon la revendication 1, caractérisé en ce que chaque saillie emboutie (32) est réalisée sous la forme d'un dôme.Heat exchanger according to claim 1, characterized in that each stamped projection (32) is produced in the form of a dome. Echangeur de chaleur selon l'une des revendications 1 à 4, dans lequel le fond (12) de la plaque collectrice (10) comprend une multiplicité de trous (24) entourés chacun par un bossage interne (30) pour la réception d'une extrémité (26) d'un tube (28), caractérisé en ce que les saillies (32; 34) sont prévues chacune entre deux bossages internes adjacents (30).Heat exchanger according to one of claims 1 to 4, wherein the bottom (12) of the collector plate (10) comprises a plurality of holes (24) each surrounded by an internal boss (30) for the reception of a end (26) of a tube (28), characterized in that the projections (32; 34) are each provided between two adjacent internal bosses (30). Echangeur de chaleur selon la revendication 5, dans lequel le fond (12) de la plaque collectrice (10) comprend des bossages externes (31) disposés chacun entre deux bossages internes adjacents (30), caractérisé en ce que les saillies (32; 34) sont situées chacune dans l'axe d'un bossage externe (31).Heat exchanger according to claim 5, in which the bottom (12) of the collecting plate (10) comprises external bosses (31) each arranged between two adjacent internal bosses (30), characterized in that the projections (32; 34 ) are each located in the axis of an external boss (31). Echangeur de chaleur selon l'une des revendications 1 à 6, dans lequel le rebord périphérique (14) de la plaque collectrice (10) a une forme générale rectangulaire avec deux côtés longitudinaux (16) et deux côtés transversaux (18), caractérisé en ce que les saillies (32; 34) sont prévues à proximité des côtés longitudinaux (16).Heat exchanger according to one of claims 1 to 6, in which the peripheral rim (14) of the collecting plate (10) has a generally rectangular shape with two longitudinal sides (16) and two transverse sides (18), characterized in that the projections (32; 34) are provided near the longitudinal sides (16). Echangeur de chaleur selon l'une des revendications 1 à 7, caractérisé en ce que le rebord périphérique (14) de la plaque collectrice (10) comporte une extrémité (46) qui est sertie localement contre la boîte à fluide (38) pour assurer un maintien provisoire de la plaque collectrice (10) et de la boîte à fluide (38) en vue de leur brasage.Heat exchanger according to one of claims 1 to 7, characterized in that the peripheral flange (14) of the collecting plate (10) has one end (46) which is crimped locally against the fluid box (38) to ensure provisional maintenance of the collector plate (10) and the fluid box (38) for their brazing. Echangeur de chaleur selon l'une des revendications 1 à 8, caractérisé en ce que la plaque collectrice (10) et la boîte à fluide (38) sont formées en aluminium ou en alliage à base d'aluminium.Heat exchanger according to one of Claims 1 to 8, characterized in that the collecting plate (10) and the fluid box (38) are formed from aluminum or an aluminum-based alloy.
EP97102248A 1996-02-20 1997-02-12 Heat exchanger with brazed waterbox, in particular for automotive vehicle Withdrawn EP0791797A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9602066A FR2745079B1 (en) 1996-02-20 1996-02-20 BRAZED FLUID BOX HEAT EXCHANGER, ESPECIALLY FOR MOTOR VEHICLES
FR9602066 1996-02-20

Publications (1)

Publication Number Publication Date
EP0791797A1 true EP0791797A1 (en) 1997-08-27

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ID=9489383

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EP97102248A Withdrawn EP0791797A1 (en) 1996-02-20 1997-02-12 Heat exchanger with brazed waterbox, in particular for automotive vehicle

Country Status (6)

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US (1) US5816316A (en)
EP (1) EP0791797A1 (en)
KR (1) KR970062642A (en)
AR (1) AR005902A1 (en)
BR (1) BR9701013A (en)
FR (1) FR2745079B1 (en)

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FR2791764A1 (en) * 1999-03-30 2000-10-06 Denso Corp HEAT EXCHANGER WITH HEAD COLLECTOR
WO2004090454A1 (en) * 2003-04-10 2004-10-21 Behr Gmbh & Co. Kg Heat exchanger, especially a charge-air cooler for motor vehicles
EP1881289A1 (en) * 2006-07-21 2008-01-23 Valeo Systemes Thermiques Heat exchanger with improved collector
EP2096398A1 (en) * 2008-02-28 2009-09-02 Behr GmbH & Co. KG Header plate of a header box and heat distributor for motor vehicles
CN101819003A (en) * 2010-04-22 2010-09-01 鑫田集团有限公司 Fastening pattern cutting collecting pipe of parallel flow condenser and processing technique thereof
WO2013060882A1 (en) * 2011-10-28 2013-05-02 Behr Gmbh & Co. Kg Heat exchanger
WO2014048960A1 (en) * 2012-09-28 2014-04-03 Valeo Systemes Thermiques Collector plate for a heat exchanger
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US6675883B1 (en) 2002-07-08 2004-01-13 Modine Manufacturing Company Manifold for heat exchanger
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FR2892807B1 (en) * 2005-11-02 2007-12-14 Valeo Systemes Thermiques REINFORCED COLLECTOR FOR A COLLECTOR BOX OF A HEAT EXCHANGER AND COLLECTOR BOX COMPRISING SUCH A COLLECTOR.
US20080156455A1 (en) * 2006-12-14 2008-07-03 Powers Michael V Heat exchanger manifolds with retention tabs
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JP5821795B2 (en) * 2012-07-18 2015-11-24 株式会社デンソー Heat exchanger
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FR2791764A1 (en) * 1999-03-30 2000-10-06 Denso Corp HEAT EXCHANGER WITH HEAD COLLECTOR
WO2004090454A1 (en) * 2003-04-10 2004-10-21 Behr Gmbh & Co. Kg Heat exchanger, especially a charge-air cooler for motor vehicles
JP2006523295A (en) * 2003-04-10 2006-10-12 ベール ゲーエムベーハー ウント コー カーゲー Heat exchangers, especially automotive air supply coolers
EP1881289A1 (en) * 2006-07-21 2008-01-23 Valeo Systemes Thermiques Heat exchanger with improved collector
FR2904101A1 (en) * 2006-07-21 2008-01-25 Valeo Systemes Thermiques HEAT EXCHANGER WITH IMPROVED COLLECTOR
EP2096398A1 (en) * 2008-02-28 2009-09-02 Behr GmbH & Co. KG Header plate of a header box and heat distributor for motor vehicles
CN101819003A (en) * 2010-04-22 2010-09-01 鑫田集团有限公司 Fastening pattern cutting collecting pipe of parallel flow condenser and processing technique thereof
WO2013060882A1 (en) * 2011-10-28 2013-05-02 Behr Gmbh & Co. Kg Heat exchanger
US9810484B2 (en) 2011-10-28 2017-11-07 Mahle International Gmbh Heat exchanger with header contact regions for tubes support
WO2014048960A1 (en) * 2012-09-28 2014-04-03 Valeo Systemes Thermiques Collector plate for a heat exchanger
FR2996297A1 (en) * 2012-09-28 2014-04-04 Valeo Systemes Thermiques COLLECTOR PLATE FOR HEAT EXCHANGER.
EP3076118A4 (en) * 2013-11-27 2017-08-16 Denso Corporation Heat exchanger

Also Published As

Publication number Publication date
MX9701278A (en) 1998-03-31
FR2745079B1 (en) 1998-04-10
US5816316A (en) 1998-10-06
KR970062642A (en) 1997-09-12
BR9701013A (en) 1998-10-27
AR005902A1 (en) 1999-07-21
FR2745079A1 (en) 1997-08-22

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