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EP0505243B1 - Heat exchanger with several rows of tubes, more particularly for motor vehicle - Google Patents

Heat exchanger with several rows of tubes, more particularly for motor vehicle Download PDF

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Publication number
EP0505243B1
EP0505243B1 EP92400666A EP92400666A EP0505243B1 EP 0505243 B1 EP0505243 B1 EP 0505243B1 EP 92400666 A EP92400666 A EP 92400666A EP 92400666 A EP92400666 A EP 92400666A EP 0505243 B1 EP0505243 B1 EP 0505243B1
Authority
EP
European Patent Office
Prior art keywords
tubes
heat exchanger
hole
end portions
exchanger according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92400666A
Other languages
German (de)
French (fr)
Other versions
EP0505243A1 (en
Inventor
Michel Potier
Philippe Le Gauyer
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 EP0505243A1 publication Critical patent/EP0505243A1/en
Application granted granted Critical
Publication of EP0505243B1 publication Critical patent/EP0505243B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—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
    • 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
    • F28D1/0391—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 a single plate being bent to form one or more conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • 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
    • F28F9/0226—Header boxes formed by sealing end plates into covers with resilient gaskets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
    • Y10S165/471—Plural parallel conduits joined by manifold
    • Y10S165/477—Elastic seal element between conduit ends and receiving holes in header plate

Definitions

  • the invention relates to a heat exchanger of the type comprising a bundle of parallel tubes arranged in rows and having respective ends received in a collecting plate provided with holes, which are optionally surrounded by collars.
  • Such heat exchangers are used in particular in motor vehicles with an internal combustion engine to provide either cooling of the engine or heating of the passenger compartment.
  • the bundle tubes are then traversed by a fluid used for cooling the engine, while air circulates between the bundle tubes.
  • the bundle tubes have a non-circular section, in particular a flattened section of oval, elliptical or oblong type, so as to reduce the pressure drop undergone by the air flow passing through the heat exchanger and at optimize the thermal performance of the latter.
  • the collector plate also called a "hole plate”
  • the collector plate is generally produced in the form of a metal plate in which the holes and the corresponding collars are arranged.
  • the seal between each end of the tube and the corresponding collar is then obtained either by interposing a compressible seal, or by direct brazing, the tube then being provided with an easily fusible metal plating.
  • the collector plate must also include several rows of holes which are separated from each other by a given center distance within the same row and by another given center distance d 'one row to another. There is thus between two consecutive holes in the collector plate a thickness of material which, for reasons of mechanical strength of the collector plate, cannot fall below a minimum value, this minimum value being essentially essential for the realization of collars if the collector plate has them.
  • the object of the invention is in particular to overcome these drawbacks.
  • a heat exchanger of the type comprising a bundle of parallel tubes arranged in rows, and the ends of which are received in a collecting plate provided with holes, possibly surrounded by collars.
  • each hole of the collector receives the respective ends of several adjacent tubes and in that the ends of tubes received in the same hole of the collector are brazed directly in this hole.
  • the center distance or not of the tubes can be brought to a minimum value. It is thus possible to optimize the performance of the heat exchanger and this for minimum dimensions of the collector plate.
  • the collector plate As each hole of the collector plate receives the respective ends of several tubes and it can also be surrounded by a collar, the collector plate is thus stiffened, which results in better resistance to pressure.
  • the ends of the tubes are flattened and the section of the hole then corresponds to the union of the sections of the tubes.
  • each hole in the collector plate has a generally oblong section delimited by two parallel sides and two sides in a semicircle.
  • the invention applies in particular to a collector plate whose holes are provided with collars.
  • the heat exchanger comprises a metal collecting plate 70 of generally rectangular shape comprising a core 72 limited by two longitudinal edges 74 (FIG. 2). Each of them comprises a part 76 which extends at right angles to the plane of the core 72, a part 78 which extends perpendicular to the part 76 and a part 80 which extends perpendicular to the part 78 and the free edge of which forms foldable legs 82.
  • the core 72 provides a multiplicity of elongated holes 84 of oblong shape, the largest dimension of which extends perpendicular to the two long sides of the collector plate.
  • Each of the holes 84 is surrounded by a collar 86 of oblong shape delimited by two parallel straight edges 88 and two semi-circular edges 90 (FIG. 3).
  • the holes 84 are spaced two by two from an axis E and each hole 84 is designed to receive the respective ends 92 of two joined tubes 94 belonging to two adjacent rows.
  • the tubes 94 are flat tubes whose section is defined by two parallel flat edges joined together by two rounded semi-circular edges ( Figure 2).
  • the two adjacent tubes 94 are separated from one another by a pitch P (FIGS. 2 and 3).
  • the ends 92 of the tubes 94 are slightly deformed so that each end is limited by two parallel flat edges 96, a semi-circular edge 98 and a small flat edge 100 ( Figures 3 and 4).
  • the tubes 94 are metallic and provided with an easily fusible plating to allow the brazing of two ends 92 each time in the collar 86 of a hole 84.
  • the hole 84 has a spout 116 which is produced on the collar 96 and which is able to adapt to the shape of the two rounded edges 114 of the tubes 94.
  • the hole 84 has two spouts 116 in screw opposite, which are projecting from the two edges 88 of the collar 86 to thereby fill the space formed between the ends 92 of the two adjacent tubes 94.
  • the other end of the bundle is advantageously provided with a similar collecting plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Description

L'invention concerne un échangeur de chaleur du type comprenant un faisceau de tubes parallèles disposés en rangées et présentant des extrémités respectives reçues dans une plaque collectrice munie de trous, lesquels sont entourés éventuellement par des collets.The invention relates to a heat exchanger of the type comprising a bundle of parallel tubes arranged in rows and having respective ends received in a collecting plate provided with holes, which are optionally surrounded by collars.

De tels échangeurs de chaleur sont utilisés notamment dans les véhicules automobiles à moteur à combustion interne pour assurer soit le refroidissement du moteur, soit le chauffage de l'habitacle. Les tubes du faisceau sont alors parcourus par un fluide servant au refroidissement du moteur, tandis que de l'air circule entre les tubes du faisceau.Such heat exchangers are used in particular in motor vehicles with an internal combustion engine to provide either cooling of the engine or heating of the passenger compartment. The bundle tubes are then traversed by a fluid used for cooling the engine, while air circulates between the bundle tubes.

Dans certains cas, les tubes du faisceau possèdent une section non circulaire, en particulier une section aplatie de type ovale, elliptique ou oblongue, de manière à réduire la perte de charge subie par le flux d'air traversant l'échangeur de chaleur et à optimiser les performances thermiques de ce dernier.In some cases, the bundle tubes have a non-circular section, in particular a flattened section of oval, elliptical or oblong type, so as to reduce the pressure drop undergone by the air flow passing through the heat exchanger and at optimize the thermal performance of the latter.

Dans les échangeurs de chaleur connus de ce type, il est prévu autant de trous dans la plaque collectrice que de tubes dans le faisceau, pour que chaque extrémité de tube soit reçue individuellement dans un trou de la plaque collectrice et soit reliée à étanchéité à la plaque collectrice, et en particulier au collet, s'il est présent, qui entoure le trou.In known heat exchangers of this type, there are provided as many holes in the collector plate as there are tubes in the bundle, so that each end of the tube is individually received in a hole in the collector plate and is tightly connected to the collector plate, and in particular the collar, if present, which surrounds the hole.

La plaque collectrice, encore appelée "plaque à trous", est généralement réalisée sous la forme d'une plaque métallique dans laquelle sont aménagés les trous et les collets correspondants. L'étanchéité entre chaque extrémité de tube et le collet correspondant est alors obtenue soit par interposition d'un joint d'étanchéité compressible, soit par brasage direct, le tube étant alors muni d'un plaquage métallique facilement fusible.The collector plate, also called a "hole plate", is generally produced in the form of a metal plate in which the holes and the corresponding collars are arranged. The seal between each end of the tube and the corresponding collar is then obtained either by interposing a compressible seal, or by direct brazing, the tube then being provided with an easily fusible metal plating.

Comme ces échangeurs de chaleur sont formés de plusieurs rangées de tubes, la plaque collectrice doit comprendre aussi plusieurs rangées de trous qui sont séparés entre eux par un entr'axe donné au sein d'une même rangée et par un autre entr'axe donné d'une rangée à l'autre. Il existe ainsi entre deux trous consécutifs de la plaque collectrice une épaisseur de matière qui, pour des raisons de résistance mécanique de la plaque collectrice, ne peut descendre au-dessous d'une valeur minimale, cette valeur minimale étant essentiellement indispensable pour la réalisation de collets dans le cas où la plaque collectrice en comporte.As these heat exchangers are formed from several rows of tubes, the collector plate must also include several rows of holes which are separated from each other by a given center distance within the same row and by another given center distance d 'one row to another. There is thus between two consecutive holes in the collector plate a thickness of material which, for reasons of mechanical strength of the collector plate, cannot fall below a minimum value, this minimum value being essentially essential for the realization of collars if the collector plate has them.

Il en résulte qu'il n'est pas possible d'optimiser les dimensions des tubes et des entr'axes et par conséquent les performances thermiques de l'échangeur de chaleur, et cela pour des dimensions données de la plaque collectrice.As a result, it is not possible to optimize the dimensions of the tubes and the spacings and therefore the thermal performance of the heat exchanger, and this for given dimensions of the collector plate.

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

Elle propose en conséquence un échangeur de chaleur du type comprenant un faisceau de tubes parallèles disposés en rangées, et dont les extrémités sont reçues dans une plaque collectrice munie de trous, éventuellement entourés par des collets.It therefore proposes a heat exchanger of the type comprising a bundle of parallel tubes arranged in rows, and the ends of which are received in a collecting plate provided with holes, possibly surrounded by collars.

Selon une caractéristique essentielle de l'invention, chaque trou du collecteur reçoit les extrémités respectives de plusieurs tubes adjacents et en ce que les extrémités de tubes reçues dans un même trou du collecteur sont brasées directement dans ce trou.According to an essential characteristic of the invention, each hole of the collector receives the respective ends of several adjacent tubes and in that the ends of tubes received in the same hole of the collector are brazed directly in this hole.

Dans ces conditions, l'entr'axe ou pas des tubes peut être amené à une valeur minimale. On peut ainsi optimiser les performances de l'échangeur de chaleur et cela pour des dimensions minimales de la plaque collectrice.Under these conditions, the center distance or not of the tubes can be brought to a minimum value. It is thus possible to optimize the performance of the heat exchanger and this for minimum dimensions of the collector plate.

Comme chaque trou de la plaque collectrice reçoit les extrémités respectives de plusieurs tubes et qu'il peut en outre être entouré par un collet, la plaque collectrice se trouve ainsi rigidifiée, d'où il résulte une meilleure tenue à la pression.As each hole of the collector plate receives the respective ends of several tubes and it can also be surrounded by a collar, the collector plate is thus stiffened, which results in better resistance to pressure.

Les extrémités des tubes sont aplaties et la section du trou correspond alors à la réunion des sections des tubes.The ends of the tubes are flattened and the section of the hole then corresponds to the union of the sections of the tubes.

Dans une forme de réalisation préférée de l'invention, chaque trou de la plaque collectrice a une section générale oblongue délimitée par deux côtés parallèles et deux côtés en demi-cercle.In a preferred embodiment of the invention, each hole in the collector plate has a generally oblong section delimited by two parallel sides and two sides in a semicircle.

L'invention s'applique en particulier à une plaque collectrice dont les trous sont munis de collets.The invention applies in particular to a collector plate whose holes are provided with collars.

Dans la description qui suit, donnée seulement à tire d'exemple, on se réfère aux dessins annexés, sur lesquels:

  • la figure 1 est une coupe longitudinale partielle d'un échangeur de chaleur dont les tubes sont brasés sur une plaque collectrice;
  • la figure 2 est une vue en coupe transversale suivant la ligne I-I de la figure 1;
  • la figure 3 est une vue en coupe suivant la ligne II-II de la figure 2;
  • la figure 4 est une vue à plus grande échelle du détail A de la figure 3; et
  • la figure 5 est une vue partielle en coupe transversale suivant la ligne III-III de la figure 4.
In the description which follows, given solely by way of example, reference is made to the appended drawings, in which:
  • Figure 1 is a partial longitudinal section of a heat exchanger whose tubes are brazed on a header plate;
  • Figure 2 is a cross-sectional view along line II of Figure 1;
  • Figure 3 is a sectional view along line II-II of Figure 2;
  • Figure 4 is an enlarged view of detail A of Figure 3; and
  • FIG. 5 is a partial view in cross section along the line III-III of FIG. 4.

Dans la forme de réalisation des figures 1 à 5, auxquelles on se réfère maintenant, l'échangeur de chaleur comprend une plaque collectrice 70 métallique de forme générale rectangulaire comprenant une âme 72 limitée par deux bords longitudinaux 74 (figure 2). Chacun d'eux comprend une partie 76 qui s'étend à angle droit par rapport au plan de l'âme 72, une partie 78 qui s'étend perpendiculairement à la partie 76 et une partie 80 qui s'étend perpendiculairement à la partie 78 et dont le bord libre forme des pattes repliables 82.In the embodiment of FIGS. 1 to 5, to which reference is now made, the heat exchanger comprises a metal collecting plate 70 of generally rectangular shape comprising a core 72 limited by two longitudinal edges 74 (FIG. 2). Each of them comprises a part 76 which extends at right angles to the plane of the core 72, a part 78 which extends perpendicular to the part 76 and a part 80 which extends perpendicular to the part 78 and the free edge of which forms foldable legs 82.

L'âme 72 ménage une multiplicité de trous allongés 84 de forme oblongue dont la plus grande dimension s'étend perpendiculairement aux deux grands côtés de la plaque collectrice. Chacun des trous 84 est entouré par un collet 86 de forme oblongue délimité par deux bords droits parallèles 88 et deux bords en demi-cercle 90 (figure 3).The core 72 provides a multiplicity of elongated holes 84 of oblong shape, the largest dimension of which extends perpendicular to the two long sides of the collector plate. Each of the holes 84 is surrounded by a collar 86 of oblong shape delimited by two parallel straight edges 88 and two semi-circular edges 90 (FIG. 3).

Les trous 84 sont distants deux à deux d'un entr'axe E et chaque trou 84 est prévu pour recevoir les extrémités respectives 92 de deux tubes 94 accolés appartenant à deux rangées adjacentes.The holes 84 are spaced two by two from an axis E and each hole 84 is designed to receive the respective ends 92 of two joined tubes 94 belonging to two adjacent rows.

Dans l'exemple, les tubes 94 sont des tubes plats dont la section est définie par deux bords plats parallèles réunis entre eux par deux bords arrondis semi-circulaires (figure 2). Les deux tubes adjacents 94 sont séparés entre eux d'un pas P (figures 2 et 3). Les extrémités 92 des tubes 94 sont légèrement déformées de manière que chaque extrémités soit limitée par deux bords plats parallèles 96, un bord semi-circulaire 98 et un petit bord plat 100 (figures 3 et 4).In the example, the tubes 94 are flat tubes whose section is defined by two parallel flat edges joined together by two rounded semi-circular edges (Figure 2). The two adjacent tubes 94 are separated from one another by a pitch P (FIGS. 2 and 3). The ends 92 of the tubes 94 are slightly deformed so that each end is limited by two parallel flat edges 96, a semi-circular edge 98 and a small flat edge 100 (Figures 3 and 4).

Ainsi, les deux extrémités 92 reçues dans un même trou 84 sont accolées par leurs petits bords 100, leurs bords respectifs 98 étant opposés.Thus, the two ends 92 received in the same hole 84 are joined by their small edges 100, their respective edges 98 being opposite.

Les tubes 94 sont métalliques et pourvus d'un plaquage facilement fusible pour permettre le brasage de deux extrémités 92 à chaque fois dans le collet 86 d'un trou 84.The tubes 94 are metallic and provided with an easily fusible plating to allow the brazing of two ends 92 each time in the collar 86 of a hole 84.

Pour réaliser l'assemblage de l'échangeur de chaleur, on forme d'abord un faisceau constitué par une multiplicité de paires de tubes 94 entre lesquels sont disposées des ailettes 102 en forme de sinusoïde (figure 1). Les extrémités 92 de tubes du faisceau sont ensuite introduites par paires dans les trous correspondants 84 de la plaque collectrice 70. Ensuite, les extrémités 92 sont aménagées à la forme représentée à la figure 3 et légèrement évasées en 106, comme montré sur la figure 1, puis on procède au brasage de l'ensemble, en formant un joint de brasage 104 résultant de la fusion de l'alliage métallique recouvrant la paroi des tubes. Ensuite, on dispose un joint annulaire 108 sur toute le pourtour de la plaque collectrice 70 et on place dans la gorge ainsi obtenue le bourrelet périphérique 112 d'une paroi 110 destinée à former une boîte à eau. Les pattes 82 sont ensuite rabattues comme montré à la figure 2 pour assurer la compression du joint 108 et réaliser une liaison étanche entre la plaque collectrice 70 et la paroi 110.To assemble the heat exchanger, first form a bundle consisting of a multiplicity of pairs of tubes 94 between which are arranged fins 102 in the form of a sinusoid (Figure 1). The ends 92 of tubes of the bundle are then introduced in pairs into the corresponding holes 84 of the collector plate 70. Next, the ends 92 are arranged in the form shown in FIG. 3 and slightly flared at 106, as shown in FIG. 1 , then the assembly is brazed, forming a brazing joint 104 resulting from the melting of the metal alloy covering the wall of the tubes. Then, there is an annular seal 108 over the entire periphery of the collector plate 70 and the peripheral bead 112 of a wall 110 intended to form a water box is placed in the groove thus obtained. The tabs 82 are then folded down as shown in FIG. 2 to ensure the compression of the seal 108 and to produce a sealed connection between the collector plate 70 and the wall 110.

Dans la pratique, il est difficile de raccorder directement à angle droit les deux bords plats 96 avec le petit bord plat 100 d'un tube 94 et il existe toujours un bord arrondi 114 de faible rayon (figure 4). Par suite, après introduction des extrémités 92 des deux tubes 94 dans le trou 84 entouré par le collet 86, on devrait normalement obtenir un espace vide entre le collet 86 et les deux bords arrondis 114 des tubes. Cet espace vide serait d'autant plus difficile à combler par la brasure que le rayon de courbure des bords arrondis 114 serait plus grand. Pour éviter cet inconvénient, le trou 84 comporte un bec 116 qui est réalisé sur le collet 96 et qui est propre à s'adapter à la forme des deux bords arrondis 114 des tubes 94. En fait le trou 84 comporte deux becs 116 en vis-à-vis, lesquels sont formés en saillie sur les deux bords 88 du collet 86 pour combler ainsi l'espace formé entre les extrémités 92 des deux tubes adjacents 94.In practice, it is difficult to connect the two flat edges 96 directly with the small flat edge 100 of a tube 94 directly at a right angle, and there is always a rounded edge 114 of small radius (FIG. 4). Consequently, after introduction of the ends 92 of the two tubes 94 into the hole 84 surrounded by the collar 86, one should normally obtain an empty space between the collar 86 and the two rounded edges 114 of the tubes. This empty space would be all the more difficult to fill with brazing as the radius of curvature of the rounded edges 114 would be greater. To avoid this drawback, the hole 84 has a spout 116 which is produced on the collar 96 and which is able to adapt to the shape of the two rounded edges 114 of the tubes 94. In fact the hole 84 has two spouts 116 in screw opposite, which are projecting from the two edges 88 of the collar 86 to thereby fill the space formed between the ends 92 of the two adjacent tubes 94.

Dans les différentes formes de réalisation précitées, l'autre extrémité du faisceau est avantageusement munie d'une plaque collectrice analogue.In the various embodiments mentioned above, the other end of the bundle is advantageously provided with a similar collecting plate.

Bien que l'invention ait été décrite en référence à des tubes de section circulaire, il doit être entendu qu'elle s'applique aussi à des tubes de section circulaire à condition de prévoir des trous de forme appropriée dans la plaque collectrice.Although the invention has been described with reference to tubes of circular section, it should be understood that it also applies to tubes of circular section provided that appropriate holes are provided in the collector plate.

On comprendra que, grâce à l'invention, il est possible de réaliser un échangeur de chaleur avec un pas minimal entre deux tubes de deux rangées adjacentes. Il en résulte des performances optimales pour une largeur minimale de la plaque collectrice tout en améliorant la tenue en pression des tubes.It will be understood that, thanks to the invention, it is possible to produce a heat exchanger with a minimum pitch between two tubes of two adjacent rows. This results in optimal performance for a minimum width of the collector plate while improving the pressure resistance of the tubes.

Claims (6)

  1. A heat exchanger of the type comprising a bundle of tubes disposed in rows, with the respective ends of the tubes being received in a header plate formed with holes, characterised in that each hole (84) of the header plate (70) receives the respective end portions (92) of a plurality of adjacent tubes (94), and in that the end portions (92) of adjacent tubes (94) received in the same hole (84) are brazed directly in the said hole.
  2. A heat exchanger according to Claim 1, characterised in that the end portions (92) of the tubes are flattened, and in that the cross section of the hole (84) corresponds to the combined cross sections of the tube end portions.
  3. A heat exchanger according to Claim 1 or Claim 2, characterised in that the hole (84) has a generally oblong cross section which is delimited by two parallel straight sides (88) and two semicircular sides (90).
  4. A heat exchanger according to one of Claims 1 to 3, characterised in that the holes (84) define nibs (116) in facing relationship with each other, so as to fill the space defined between the end portions (92) of two adjacent tubes.
  5. A heat exchanger according to one of the preceding Claims, characterised in that the end portions (84) of the tubes (94) are part of different rows of the bundle.
  6. A heat exchanger according to one of the preceding Claims, characterised in that each hole (84) is formed with a collar portion (86).
EP92400666A 1991-03-20 1992-03-13 Heat exchanger with several rows of tubes, more particularly for motor vehicle Expired - Lifetime EP0505243B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103411A FR2674321B1 (en) 1991-03-20 1991-03-20 HEAT EXCHANGER WITH MULTIPLE ROWS OF TUBES, PARTICULARLY FOR A MOTOR VEHICLE.
FR9103411 1991-03-20

Publications (2)

Publication Number Publication Date
EP0505243A1 EP0505243A1 (en) 1992-09-23
EP0505243B1 true EP0505243B1 (en) 1993-12-01

Family

ID=9410957

Family Applications (2)

Application Number Title Priority Date Filing Date
EP92400665A Expired - Lifetime EP0505242B1 (en) 1991-03-20 1992-03-13 Heat exchanger with several rows of tubes, more particularly for motor vehicle
EP92400666A Expired - Lifetime EP0505243B1 (en) 1991-03-20 1992-03-13 Heat exchanger with several rows of tubes, more particularly for motor vehicle

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP92400665A Expired - Lifetime EP0505242B1 (en) 1991-03-20 1992-03-13 Heat exchanger with several rows of tubes, more particularly for motor vehicle

Country Status (8)

Country Link
US (2) US5314021A (en)
EP (2) EP0505242B1 (en)
JP (2) JPH0712489A (en)
BR (2) BR9200964A (en)
DE (2) DE69200027T2 (en)
ES (2) ES2049118T3 (en)
FR (1) FR2674321B1 (en)
MX (2) MX9201231A (en)

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Also Published As

Publication number Publication date
US5314021A (en) 1994-05-24
FR2674321A1 (en) 1992-09-25
DE69200026T2 (en) 1994-03-31
BR9200965A (en) 1992-11-17
JP3388354B2 (en) 2003-03-17
BR9200964A (en) 1992-11-17
FR2674321B1 (en) 1993-06-04
EP0505242B1 (en) 1993-12-01
DE69200027D1 (en) 1994-01-13
MX9201229A (en) 1992-10-01
US5174372A (en) 1992-12-29
DE69200026D1 (en) 1994-01-13
ES2049119T3 (en) 1994-04-01
JPH0712489A (en) 1995-01-17
EP0505243A1 (en) 1992-09-23
MX9201231A (en) 1992-10-01
ES2049118T3 (en) 1994-04-01
DE69200027T2 (en) 1994-03-31
EP0505242A1 (en) 1992-09-23
JPH05118787A (en) 1993-05-14

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