EP3298338B1 - Heat exchanger, in particular for a motor vehicle - Google Patents

Heat exchanger, in particular for a motor vehicle Download PDF

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Publication number
EP3298338B1
EP3298338B1 EP16723763.5A EP16723763A EP3298338B1 EP 3298338 B1 EP3298338 B1 EP 3298338B1 EP 16723763 A EP16723763 A EP 16723763A EP 3298338 B1 EP3298338 B1 EP 3298338B1
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EP
European Patent Office
Prior art keywords
collars
heat exchanger
collecting plate
tubes
collar
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EP16723763.5A
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German (de)
French (fr)
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EP3298338A1 (en
Inventor
Christian Riondet
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Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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Publication of EP3298338A1 publication Critical patent/EP3298338A1/en
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2230/00—Sealing means

Definitions

  • the invention relates to the field of heat exchangers, in particular for motor vehicles.
  • An exchanger according to the preamble of claim 1 is known from the document WO 2012/26664 .
  • the invention relates more particularly to a heat exchanger, such as a radiator for engine coolant, conventionally comprising a row of tubes interposed with corrugated fins and a collector plate.
  • the collector plate generally made of aluminum by a stamping process, has a certain number of holes each surrounded by a collar.
  • the term “collar” designates in this case a crown of material which projects from the collector plate, resulting from the process for producing the holes, generally by puncturing during which the plate is pierced without removal of material.
  • Each of the holes is suitable for receiving a tube from the row of tubes, one end of which comes into contact with the interior wall of the collar.
  • the collector plate is often capped by a cover so as to form a collector box comprising a chamber traversed by a fluid which also circulates in the row of tubes. Thus, it can distribute liquid to the tubes and / or collect liquid from the tubes.
  • a peripheral seal is arranged between the manifold plate and the cover to seal the manifold. The positioning of the peripheral seal varies according to the structure of the collector plate.
  • collector plates so-called “flat” collector plates and so-called “grooved” collector plates.
  • the flat collector plates have a generally flat structure, having no pronounced positive or negative reliefs other than the collars. For example, these are the plates described in the patent application FR-2 977 932 in the name of the plaintiff.
  • grooved collector plates like those described in the patent US-6,988,544 , have a peripheral groove extending outside the main plane from which the collars are made.
  • the grooved collector plates there is a variant of collector plates called "grooved with flat ends".
  • the peripheral groove of these collector plates is not present or is shallow at the ends in the direction of the length of the collector plate.
  • the peripheral seal is placed in the peripheral groove intended to receive it.
  • the seal is mainly carried by the most extreme tubes of the row of tubes.
  • the tubes are generally inserted in the same direction as the direction of progression of the puncture tool.
  • they are introduced slightly beyond the collar, inside the chamber of the manifold, to ensure brazing or welding of satisfactory quality between the tube and the collar.
  • the presence of the collar makes it possible to provide a larger surface for the brazing or the welding of the tube than a simple slot. This also avoids the risk of leakage.
  • exceeding a part of the tube in the exchanger chamber can cause a pressure drop in the circulation of the fluid.
  • this overshoot is all the more important for the end tubes of the row of tubes, conventionally around 10 mm, since the collector plate is often non-flat and generally curved in the center, and the tubes are generally of same length. This induced pressure reduction must then be compensated by an additional effort from the pump to ensure a uniform flow of the fluid throughout the circuit.
  • the patent FR-2 764 054 of the applicant describes a heat exchanger which comprises a collecting plate with "inverted collars".
  • the tubes are inserted into the collecting plate on the side of the collars, that is to say in the direction opposite to the direction of formation by puncturing the holes.
  • "reverse collars" have drawbacks.
  • the collars being oriented towards the outside of the manifold, the insertion of the tubes into the collector plate is more difficult due to a smaller opening and the absence of guidance of the tubes to enter the collars.
  • the tubes no longer protruding sufficiently into the chamber of the manifold, the internal surface of the manifold plate has no relief that can carry the seal. Other means are then necessary to carry the seal.
  • the invention particularly aims to provide an improved heat exchanger in pressure drop which overcomes at least one of these drawbacks.
  • the subject of the invention is a heat exchanger according to claim 1.
  • all the tubes are of the same length.
  • the insertion of the tubes into the manifold plate is also simplified, since it is not necessary to identify and distribute a tube according to its position on the collector plate.
  • the insertion of tubes of the same length in the collector plate of the invention makes it possible to reduce the pressure drop around the extremal tubes, in particular for plates comprising a non-zero curvature on a longitudinal section. Indeed, the non-extreme collars being oriented towards the outside of the manifold, it is not necessary to introduce the corresponding tubes until they protrude inside the chamber of the manifold.
  • the tubes are of reduced length.
  • the tubes being the same length, the length of the part of an end tube which protrudes inside the chamber is then also reduced.
  • each of the tubes inserted in the end collars protrudes from the internal face of the collector plate exceeding a length less than or equal to 3 mm from the collar which receives it.
  • the opening of the end collars cannot be defined on a single plane, for example when it is concave, the length of the projecting part of the tube is evaluated from the highest point of the 'opening. This length is reduced by more than a third compared to that of a tube of a conventional collector plate. Significant consequences on the pressure drop are observed.
  • the invention also relates to a heat exchanger comprising a peripheral seal carried by the end collars of the row of collets.
  • the figures 1 to 4 represent a collecting plate 10, of generally rectangular shape, having an internal face 12 and an external face 14 of a heat exchanger comprising several collars 16, 16a around the holes 17.
  • the collars are arranged in a row for each to receive a tube 18.
  • the two end collars 16a of the row of collars protrude from the internal face 12 of the collector plate 10, while at least one other of the collars 16 protrudes from the external face 14 of the collector plate 10.
  • all the collars 16 project from the face external, with the exception of the end collars 16a.
  • the collecting plate 10 comprises a peripheral groove 20 intended to receive a seal 22 for sealing with a cover.
  • the groove 20 is deep enough to accommodate the seal 22 and ensure its stability.
  • the collector plate 10 is curved in the longitudinal direction 28. On a longitudinal section, such as for example that of the figure 3 , it has a generally rounded shape in the center and concave at the ends so that in the center the portion between two adjacent collars 16 is offset by a distance of the order of the thickness of the material at these portions (thickness determined) relative to an equivalent portion located between a collar 16 and an end collar 16a.
  • This distance, or amplitude of curvature can, in embodiments not shown, be different, less or greater but less than the distance corresponding to the pitch of tubes.
  • the collector plate may be generally flat in the direction 30.
  • the presence of a curvature in one or more directions makes it possible to reinforce the mechanical resistance of the collector plate and to facilitate the formation of collars.
  • the plate In the longitudinal direction 28, the plate has alternating solid portions and collars 16 so that in transverse section it has undulations ( fig.3, fig.4 ). These undulations have a pitch which corresponds to the pitch between two neighboring collars 16 or between a collar 16 and an end collar 16a. This pitch is constant and is between 5.5 mm and 10 mm, preferably between 6 mm and 8 mm.
  • Each of the tubes 18 inserted in a collar 16, 16a of the collector plate is substantially the same length as the other tubes inserted. Due to the curvature of the plate 10 in the direction 28 and the fact that the collars 16 protrude from the external face 14, the extremal tubes project less than the internal face 12. Each of them protrudes from the internal face 12 exceeding a length less than or equal to 3 mm from the collar 16a which receives it. As the mouth 40 of the collars 16a is not flat, the protrusion is measured from the highest point at the center of the opening of the collar.
  • the collector plate comprises at least one zone the thickness of which is reduced, preferably the thickness is reduced to half the initial thickness of the plate. This zone includes the location of the puncture of one or more collars 16, 16a and is therefore situated around the latter.
  • the assembly of the collecting plate 10 and of the row of tubes 18 is then covered with a cover to form a closed chamber of a collecting box, the sealing of which is ensured by the seal 22.
  • the collecting box is then mounted in a heat exchanger supplied by one or more fluids.

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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)

Description

L'invention se rapporte au domaine des échangeurs de chaleur, en particulier pour véhicules automobiles. Un échangeur selon le préambule de la revendication 1 est connu du document WO 2012/26664 .The invention relates to the field of heat exchangers, in particular for motor vehicles. An exchanger according to the preamble of claim 1 is known from the document WO 2012/26664 .

L'invention concerne plus particulièrement un échangeur de chaleur, tel qu'un radiateur pour liquide de refroidissement moteur, comprenant classiquement une rangée de tubes intercalés d'ailettes ondulées et une plaque collectrice. La plaque collectrice, généralement réalisée en aluminium par un procédé d'emboutissage, dispose d'un certain nombre de trous entourés chacun d'un collet. Le terme « collet » désigne dans ce cas une couronne de matière qui fait saillie de la plaque collectrice, issue du procédé de réalisation des trous, généralement par crevage lors duquel la plaque est transpercée sans retrait de matière. Chacun des trous est apte à recevoir un tube de la rangée de tubes, dont une extrémité entre en contact avec la paroi intérieure du collet.The invention relates more particularly to a heat exchanger, such as a radiator for engine coolant, conventionally comprising a row of tubes interposed with corrugated fins and a collector plate. The collector plate, generally made of aluminum by a stamping process, has a certain number of holes each surrounded by a collar. The term “collar” designates in this case a crown of material which projects from the collector plate, resulting from the process for producing the holes, generally by puncturing during which the plate is pierced without removal of material. Each of the holes is suitable for receiving a tube from the row of tubes, one end of which comes into contact with the interior wall of the collar.

La plaque collectrice est souvent coiffée par un couvercle de manière à former une boîte collectrice comprenant une chambre parcourue par un fluide qui circule également dans la rangée de tubes. Ainsi, elle peut distribuer du liquide aux tubes et/ou collecter du liquide des tubes. Un joint périphérique est disposé entre la plaque collectrice et le couvercle pour assurer l'étanchéité de la boîte collectrice. Le positionnement du joint périphérique varie en fonction de la structure de la plaque collectrice. Il existe deux grandes catégories de plaques collectrices : les plaques collectrices dites « plates » et les plaques collectrices dites « à gorge ». Comme leur nom l'indique, les plaques collectrices plates ont une structure globalement plate, n'ayant pas de reliefs positifs ou négatifs prononcés autres que les collets. Par exemple, ce sont les plaques décrites dans la demande de brevet FR-2 977 932 au nom de la demanderesse. En revanche, les plaques collectrices à gorge, comme celles décrites dans le brevet US-6 988 544 , présentent une gorge périphérique s'étendant en dehors du plan principal à partir duquel les collets sont réalisés. Parmi les plaques collectrices à gorge, il existe une variante de plaques collectrices dites « à gorge aux extrémités plates ». La gorge périphérique de ces plaques collectrices n'est pas présente ou est de faible profondeur aux extrémités dans la direction de la longueur de la plaque collectrice. Dans les plaques collectrices à gorge classiques où la gorge a une profondeur suffisante, le joint périphérique est posé dans la gorge périphérique destinée à l'accueillir. Dans le cas des plaques collectrices plates ou à gorge aux extrémités plates, le joint d'étanchéité est principalement porté par les tubes les plus extrêmes de la rangée de tubes.The collector plate is often capped by a cover so as to form a collector box comprising a chamber traversed by a fluid which also circulates in the row of tubes. Thus, it can distribute liquid to the tubes and / or collect liquid from the tubes. A peripheral seal is arranged between the manifold plate and the cover to seal the manifold. The positioning of the peripheral seal varies according to the structure of the collector plate. There are two main categories of collector plates: so-called “flat” collector plates and so-called “grooved” collector plates. As their name suggests, the flat collector plates have a generally flat structure, having no pronounced positive or negative reliefs other than the collars. For example, these are the plates described in the patent application FR-2 977 932 in the name of the plaintiff. On the other hand, grooved collector plates, like those described in the patent US-6,988,544 , have a peripheral groove extending outside the main plane from which the collars are made. Among the grooved collector plates, there is a variant of collector plates called "grooved with flat ends". The peripheral groove of these collector plates is not present or is shallow at the ends in the direction of the length of the collector plate. In conventional grooved collector plates where the groove has a sufficient depth, the peripheral seal is placed in the peripheral groove intended to receive it. In the case of flat or grooved header plates with flat ends, the seal is mainly carried by the most extreme tubes of the row of tubes.

Les tubes sont généralement insérés dans la même direction que la direction de progression de l'outil de crevage. Lors de l'insertion des tubes, on les introduit légèrement au-delà du collet, à l'intérieur de la chambre de la boîte collectrice, pour assurer un brasage ou un soudage de qualité satisfaisante entre le tube et le collet. En effet, la présence du collet permet de fournir une surface plus importante au brasage ou à la soudure du tube qu'une simple fente. Cela permet également d'éviter des risques de fuite. Cependant, le dépassement d'une partie du tube dans la chambre de l'échangeur peut entraîner une perte de charge à la circulation du fluide. Par ailleurs, ce dépassement est d'autant plus important pour les tubes d'extrémité de la rangée de tubes, classiquement d'environ 10 mm, car la plaque collectrice est souvent non plate et globalement bombée au centre, et les tubes sont généralement de même longueur. Cette diminution de pression induite doit alors être compensée par un effort supplémentaire de la pompe pour assurer un écoulement uniforme du fluide dans tout le circuit.The tubes are generally inserted in the same direction as the direction of progression of the puncture tool. When the tubes are inserted, they are introduced slightly beyond the collar, inside the chamber of the manifold, to ensure brazing or welding of satisfactory quality between the tube and the collar. Indeed, the presence of the collar makes it possible to provide a larger surface for the brazing or the welding of the tube than a simple slot. This also avoids the risk of leakage. However, exceeding a part of the tube in the exchanger chamber can cause a pressure drop in the circulation of the fluid. Furthermore, this overshoot is all the more important for the end tubes of the row of tubes, conventionally around 10 mm, since the collector plate is often non-flat and generally curved in the center, and the tubes are generally of same length. This induced pressure reduction must then be compensated by an additional effort from the pump to ensure a uniform flow of the fluid throughout the circuit.

Pour surmonter ces inconvénients, le brevet FR-2 764 054 de la demanderesse décrit un échangeur de chaleur qui comprend une plaque collectrice à « collets inversés ». En effet, les tubes sont insérés dans la plaque collectrice du côté des collets, c'est-à-dire dans la direction opposée à la direction de formation par crevage des trous. Dans ce cas, il existe une surface suffisante de brasage ou de soudure entre les collets et les tubes sans dépassement ou avec un dépassement réduit des tubes dans la chambre de la boîte collectrice. Les pertes de charge sont ainsi réduites. Cependant, les « collets inversés » ont des inconvénients. Premièrement, les collets étant orientés vers l'extérieur de la boîte collectrice, l'insertion des tubes dans la plaque collectrice est plus difficile en raison d'une ouverture plus petite et de l'absence de guidage des tubes pour pénétrer dans les collets. Deuxièmement, les tubes ne dépassant plus suffisamment dans la chambre de la boîte collectrice, la surface interne de la plaque collectrice ne présente aucun relief pouvant porter le joint d'étanchéité. D'autres moyens sont alors nécessaires pour porter le joint.To overcome these disadvantages, the patent FR-2 764 054 of the applicant describes a heat exchanger which comprises a collecting plate with "inverted collars". In fact, the tubes are inserted into the collecting plate on the side of the collars, that is to say in the direction opposite to the direction of formation by puncturing the holes. In this case, there is a sufficient surface for soldering or welding between the collars and the tubes without protruding or with a reduced protrusion of the tubes in the chamber of the manifold. The pressure drops are thus reduced. However, "reverse collars" have drawbacks. Firstly, the collars being oriented towards the outside of the manifold, the insertion of the tubes into the collector plate is more difficult due to a smaller opening and the absence of guidance of the tubes to enter the collars. Secondly, the tubes no longer protruding sufficiently into the chamber of the manifold, the internal surface of the manifold plate has no relief that can carry the seal. Other means are then necessary to carry the seal.

L'invention a notamment pour but de fournir un échangeur thermique amélioré en perte de charge qui surmonte au moins un de ces inconvénients.The invention particularly aims to provide an improved heat exchanger in pressure drop which overcomes at least one of these drawbacks.

A cet effet, l'invention a pour objet un échangeur de chaleur selon la revendication 1.To this end, the subject of the invention is a heat exchanger according to claim 1.

La plaque collectrice de l'échangeur de chaleur peut en outre comporter l'une ou plusieurs des caractéristiques suivantes, prises seules ou en combinaison.

  • La plaque collectrice comprend une gorge périphérique destinée à recevoir un joint d'étanchéité pour assurer l'étanchéité avec un couvercle. La gorge est d'une profondeur suffisante, par exemple supérieure ou égale à l'épaisseur du joint, pour assurer le positionnement du joint. Au moins une partie des parois qui la délimitent aux extrémités de la plaque collectrice dans la direction d'une longueur est constituée par les collets d'extrémité. Ces derniers faisant saillie depuis la face interne de la plaque collectrice permettent donc de porter le joint périphérique nécessaire à l'étanchéité de la boîte collectrice. Ainsi, il n'est plus nécessaire de prévoir d'autres moyens d'appui du joint d'étanchéité qui viennent augmenter la perte de charge et rendre plus complexe la fabrication de la plaque collectrice.
  • La plaque présente une épaisseur déterminée à l'exception des collets qui présentent une épaisseur diminuée par rapport au reste de la plaque collectrice. De préférence, l'épaisseur diminuée correspond à la moitié de l'épaisseur initiale de la plaque collectrice. En effet, une faible épaisseur facilite le crevage et permet la formation de longs collets possédant une surface de brasage importante.
  • La plaque collectrice comprend une courbure non nulle dans la direction d'une longueur de la plaque collectrice. En d'autres termes, la plaque collectrice comprend une courbure non nulle sur une section longitudinale. Cela signifie également que la plaque collectrice possède au moins une crête ou un creux. La présence d'une courbure non nulle permet d'augmenter la résistance mécanique de la plaque collectrice.
  • Les collets étant disposés régulièrement le long de ladite direction de façon à définir un pas de tubes, l'amplitude maximale entre un collet et un autre collet adjacent à un collet d'extrémité est inférieure audit pas de tube.
  • L'amplitude est de l'ordre de ladite épaisseur diminuée.
  • Une courbure non nulle dans la direction d'une largeur de la plaque collectrice. Dans d'autres termes, la plaque collectrice comprend une courbure non nulle sur une section transversale. De même, la courbure permet d'augmenter la résistance mécanique de la plaque collectrice
  • Le pas entre deux collets voisins est compris entre 5.5 mm et 10 mm, de préférence entre 6 mm et 8 mm.
The header plate of the heat exchanger may further include one or more of the following characteristics, taken alone or in combination.
  • The collector plate includes a peripheral groove intended to receive a seal for sealing with a cover. The groove is of sufficient depth, for example greater than or equal to the thickness of the seal, to ensure the positioning of the seal. At least part of the walls which delimit it at the ends of the collector plate in the direction of a length is formed by the end collars. The latter projecting from the internal face of the manifold plate therefore make it possible to wear the peripheral seal necessary for sealing the manifold. Thus, it is no longer necessary to provide other means of support for the seal which increase the pressure drop and make the manufacture of the collector plate more complex.
  • The plate has a determined thickness with the exception of the collars which have a reduced thickness compared to the rest of the collector plate. Preferably, the reduced thickness corresponds to half of the initial thickness of the collector plate. Indeed, a small thickness facilitates puncturing and allows the formation of long collars having a large brazing surface.
  • The collector plate includes a non-zero curvature in the direction of a length of the collector plate. In other words, the collector plate comprises a non-zero curvature over a longitudinal section. This also means that the collector plate has at least one crest or a trough. The presence of a non-zero curvature increases the mechanical resistance of the collector plate.
  • The collars being arranged regularly along said direction so as to define a tube pitch, the maximum amplitude between a collar and another collar adjacent to an end collar is less than said tube pitch.
  • The amplitude is of the order of said reduced thickness.
  • A non-zero curvature in the direction of a width of the collector plate. In other words, the collector plate comprises a non-zero curvature on a cross section. Similarly, the curvature increases the mechanical resistance of the collector plate
  • The pitch between two neighboring collars is between 5.5 mm and 10 mm, preferably between 6 mm and 8 mm.

Selon l'invention tous les tubes sont de la même longueur.According to the invention all the tubes are of the same length.

Outre le fait qu'il est plus économique de fabriquer des tubes identiques à grande échelle, l'insertion des tubes dans la plaque collectrice est également simplifiée, car il n'est pas nécessaire d'identifier et de distribuer un tube en fonction de sa position sur la plaque collectrice. De plus, en comparaison avec une plaque collectrice où tous les collets font saillie de la face interne de la plaque collectrice, l'insertion de tubes de même longueur dans la plaque collectrice de l'invention permet de diminuer la perte de charge aux alentours des tubes extrémaux, en particulier pour les plaques comprenant une courbure non nulle sur une section longitudinale. En effet, les collets non extrémaux étant orientés vers l'extérieur de la boîte collectrice, il n'est pas nécessaire d'introduire les tubes correspondants jusqu'à leur dépassement à l'intérieur de la chambre de la boîte collectrice. Ainsi les tubes sont de longueur réduite. Les tubes étant de même longueur, la longueur de la partie d'un tube d'extrémité qui dépasse à l'intérieur de la chambre est alors également réduite.In addition to the fact that it is more economical to manufacture identical tubes on a large scale, the insertion of the tubes into the manifold plate is also simplified, since it is not necessary to identify and distribute a tube according to its position on the collector plate. In addition, in comparison with a collector plate where all the collars protrude from the internal face of the collector plate, the insertion of tubes of the same length in the collector plate of the invention makes it possible to reduce the pressure drop around the extremal tubes, in particular for plates comprising a non-zero curvature on a longitudinal section. Indeed, the non-extreme collars being oriented towards the outside of the manifold, it is not necessary to introduce the corresponding tubes until they protrude inside the chamber of the manifold. Thus the tubes are of reduced length. The tubes being the same length, the length of the part of an end tube which protrudes inside the chamber is then also reduced.

Selon l'invention chacun des tubes insérés dans les collets d'extrémité fait saillie de la face interne de la plaque collectrice en dépassant d'une longueur inférieure ou égale à 3 mm du collet qui le reçoit. Lorsque l'ouverture des collets d'extrémité ne peut pas être définie sur un seul plan, par exemple lorsqu'elle est de forme concave, la longueur de la partie du tube qui fait saillie est évaluée à partir du point le plus haut de l'ouverture. Cette longueur est réduite de plus d'un tiers par rapport à celle d'un tube d'une plaque collectrice classique. Des conséquences notables sur la perte de charge sont observées.According to the invention each of the tubes inserted in the end collars protrudes from the internal face of the collector plate exceeding a length less than or equal to 3 mm from the collar which receives it. When the opening of the end collars cannot be defined on a single plane, for example when it is concave, the length of the projecting part of the tube is evaluated from the highest point of the 'opening. This length is reduced by more than a third compared to that of a tube of a conventional collector plate. Significant consequences on the pressure drop are observed.

L'invention a également pour objet un échangeur de chaleur comprenant un joint d'étanchéité périphérique porté par les collets d'extrémité de la rangée de collets.The invention also relates to a heat exchanger comprising a peripheral seal carried by the end collars of the row of collets.

L'invention sera mieux comprise à la lecture des figures annexées, qui sont fournies à titre d'exemples et ne présentent aucun caractère limitatif, dans lesquelles :

  • la figure 1 est une vue en perspective d'une plaque collectrice d'un échangeur de chaleur selon un mode de réalisation avant l'insertion des tubes,
  • la figure 2 est une vue en perspective de la plaque collectrice de la figure 1 après l'insertion des tubes,
  • la figure 3 est une vue en perspective en coupe longitudinale de la plaque collectrice de la figure 1 avant l'insertion des tubes,
  • la figure 4 est une vue en perspective en coupe longitudinale de la plaque collectrice de la figure 1 après l'insertion des tubes,
  • la figure 5 est une vue en perspective en coupe transversale d'une plaque collectrice à gorge à base arrondie d'un échangeur de chaleur selon un mode de réalisation,
  • la figure 6 est une vue en perspective en coupe transversale d'une plaque collectrice plate d'un échangeur de chaleur selon un mode de réalisation, et
  • la figure 7 est une vue en perspective en coupe transversale d'une plaque collectrice d'un échangeur de chaleur selon un mode de réalisation.
The invention will be better understood on reading the appended figures, which are provided by way of examples and have no limiting character, in which:
  • the figure 1 is a perspective view of a collector plate of a heat exchanger according to one embodiment before the insertion of the tubes,
  • the figure 2 is a perspective view of the manifold of the figure 1 after inserting the tubes,
  • the figure 3 is a perspective view in longitudinal section of the collector plate of the figure 1 before inserting the tubes,
  • the figure 4 is a perspective view in longitudinal section of the collector plate of the figure 1 after inserting the tubes,
  • the figure 5 is a perspective view in cross section of a collecting plate with a rounded groove of a heat exchanger according to one embodiment,
  • the figure 6 is a perspective view in cross section of a flat header plate of a heat exchanger according to one embodiment, and
  • the figure 7 is a perspective view in cross section of a header plate of a heat exchanger according to one embodiment.

Les figures 1 à 4 représentent une plaque collectrice 10, de forme globalement rectangulaire, ayant une face interne 12 et une face externe 14 d'un échangeur de chaleur comportant plusieurs collets 16,16a autour des trous 17. Les collets sont agencés en une rangée pour chacun recevoir un tube 18. Les deux collets d'extrémité 16a de la rangée de collets font saillie de la face interne 12 de la plaque collectrice 10, tandis qu'au moins un autre des collets 16 fait saillie de la face externe 14 de la plaque collectrice 10. Dans les figures, tous les collets 16 font saillie de la face externe, à l'exception des collets d'extrémité 16a. La plaque collectrice 10 comprend une gorge périphérique 20 destinée à recevoir un joint d'étanchéité 22 pour assurer l'étanchéité avec un couvercle. La gorge 20 est suffisamment profonde pour accueillir le joint 22 et assurer sa stabilité. Elle est délimitée par une paroi externe 24 et un relief 26 en saillie suivant la direction 28 de la longueur de la plaque collectrice. Cependant, aux extrémités de la plaque collectrice 10, la gorge 20 est délimitée par la paroi externe 24 et les collets d'extrémité 16a. Ainsi, le joint 22 s'appuie ultérieurement contre le relief 26 et les parois externes des collets d'extrémité 16a.The figures 1 to 4 represent a collecting plate 10, of generally rectangular shape, having an internal face 12 and an external face 14 of a heat exchanger comprising several collars 16, 16a around the holes 17. The collars are arranged in a row for each to receive a tube 18. The two end collars 16a of the row of collars protrude from the internal face 12 of the collector plate 10, while at least one other of the collars 16 protrudes from the external face 14 of the collector plate 10. In the figures, all the collars 16 project from the face external, with the exception of the end collars 16a. The collecting plate 10 comprises a peripheral groove 20 intended to receive a seal 22 for sealing with a cover. The groove 20 is deep enough to accommodate the seal 22 and ensure its stability. It is delimited by an external wall 24 and a relief 26 projecting in the direction 28 of the length of the collector plate. However, at the ends of the collecting plate 10, the groove 20 is delimited by the external wall 24 and the end collars 16a. Thus, the seal 22 is subsequently pressed against the relief 26 and the external walls of the end collars 16a.

La plaque collectrice 10 est courbée dans la direction longitudinale 28. Sur une section longitudinale, comme par exemple celle de la figure 3, elle a une forme globalement bombée au centre et concave aux extrémités de sorte qu'au centre la portion entre deux collets 16 adjacents est décalée d'une distance de l'ordre de l'épaisseur de la matière au niveau de ces portions (épaisseur déterminée) par rapport à une portion équivalente située entre un collet 16 et un collet 16a d'extrémité. Cette distance, ou amplitude de courbure, peut, dans des modes de réalisation non représentés être différente, inférieure ou supérieure mais inférieure à la distance correspondant au pas de tubes.The collector plate 10 is curved in the longitudinal direction 28. On a longitudinal section, such as for example that of the figure 3 , it has a generally rounded shape in the center and concave at the ends so that in the center the portion between two adjacent collars 16 is offset by a distance of the order of the thickness of the material at these portions (thickness determined) relative to an equivalent portion located between a collar 16 and an end collar 16a. This distance, or amplitude of curvature, can, in embodiments not shown, be different, less or greater but less than the distance corresponding to the pitch of tubes.

Elle est également courbée dans la direction transversale 30. Sur une section transversale, comme par exemple celle de la figure 5, elle est concave au centre et a les bords relevés jusqu'à former les parois du relief 26. Dans d'autres modes de réalisation, comme ceux des figures 6 et 7, la plaque collectrice peut être globalement plate dans la direction 30. La présence d'une courbure dans une ou plusieurs directions permet de renforcer la résistance mécanique de la plaque collectrice et de faciliter la formation de collets.It is also bent in the transverse direction 30. On a cross section, such as for example that of the figure 5 , it is concave in the center and has the edges raised up to form the walls of the relief 26. In other embodiments, such as those of Figures 6 and 7 , the collector plate may be generally flat in the direction 30. The presence of a curvature in one or more directions makes it possible to reinforce the mechanical resistance of the collector plate and to facilitate the formation of collars.

Selon la direction longitudinale 28, la plaque présente une alternance de portions pleines et de collets 16 de sorte qu'en coupe transversale celle-ci présente des ondulations (fig.3, fig.4). Ces ondulations présentent un pas qui correspond au pas entre deux collets voisins 16 ou entre un collet 16 et un collet d'extrémité 16a. Ce pas est constant et est compris entre 5.5 mm et 10 mm, de préférence entre 6 mm et 8 mm.In the longitudinal direction 28, the plate has alternating solid portions and collars 16 so that in transverse section it has undulations ( fig.3, fig.4 ). These undulations have a pitch which corresponds to the pitch between two neighboring collars 16 or between a collar 16 and an end collar 16a. This pitch is constant and is between 5.5 mm and 10 mm, preferably between 6 mm and 8 mm.

Chacun des tubes 18 inséré dans un collet 16, 16a de la plaque collectrice est sensiblement de même longueur que les autres tubes insérés. En raison de la courbure de la plaque 10 dans la direction 28 et du fait que les collets 16 font saillie depuis la face externe 14, les tubes extrémaux dépassent moins de la face interne 12. Chacun d'entre eux fait saillie depuis la face interne 12 en dépassant d'une longueur inférieure ou égale à 3 mm du collet 16a qui le reçoit. Comme l'embouchure 40 des collets 16a n'est pas plane, le dépassement est mesuré à partir du point le plus haut au centre de l'ouverture du collet.Each of the tubes 18 inserted in a collar 16, 16a of the collector plate is substantially the same length as the other tubes inserted. Due to the curvature of the plate 10 in the direction 28 and the fact that the collars 16 protrude from the external face 14, the extremal tubes project less than the internal face 12. Each of them protrudes from the internal face 12 exceeding a length less than or equal to 3 mm from the collar 16a which receives it. As the mouth 40 of the collars 16a is not flat, the protrusion is measured from the highest point at the center of the opening of the collar.

La plaque collectrice comprend au moins une zone dont l'épaisseur est diminuée, de préférence, l'épaisseur est réduite jusqu'à la moitié de l'épaisseur initiale de la plaque. Cette zone comprend le lieu de crevage d'un ou plusieurs collets 16, 16a et est donc située autour de ces derniers.The collector plate comprises at least one zone the thickness of which is reduced, preferably the thickness is reduced to half the initial thickness of the plate. This zone includes the location of the puncture of one or more collars 16, 16a and is therefore situated around the latter.

L'ensemble de la plaque collectrice 10 et de la rangée de tubes 18 est ensuite recouvert d'un couvercle pour former une chambre close d'une boîte collectrice dont l'étanchéité est assurée par le joint 22. La boîte collectrice est ensuite montée dans un échangeur de chaleur alimenté par un ou plusieurs fluides.The assembly of the collecting plate 10 and of the row of tubes 18 is then covered with a cover to form a closed chamber of a collecting box, the sealing of which is ensured by the seal 22. The collecting box is then mounted in a heat exchanger supplied by one or more fluids.

Claims (9)

  1. Heat exchanger comprising an assembly of a collecting plate and tubes, each inserted into a collar of the collecting plate, wherein all of the tubes are of the same length, the collecting plate (10) having an inner face (12) and an outer face (14) the heat exchanger, comprising at least three collars (16, 16a) arranged in a row so that each collar receives a tube (18), characterized in that the two end collars (16a) of the row of collars protrude from the inner face (12) of the collecting plate (10), while at least one of the other collars (16) protrudes from the outer face (14) of the collecting plate (10), and in that each of the tubes inserted into the end collars protrudes from the inner face of the collecting plate, projecting by a length less than or equal to 3 mm of the collar which receives said tube.
  2. Heat exchanger according to Claim 1, the collecting plate (10), comprising a peripheral groove (20) designed to receive a seal ring (22) to provide the seal with a cover.
  3. Heat exchanger according to either one of the preceding claims, wherein said plate has a specific thickness, with the exception of the collars (16, 16a) which have a reduced thickness relative to the remainder of the collecting plate.
  4. Heat exchanger according to any one of the preceding claims, having a non-zero curvature in the direction (28) of a length of the collecting plate (10).
  5. Heat exchanger according to Claim 4, wherein since the collars are arranged at regular intervals along the length of said direction (28) so as to define a tube pitch, the maximum amplitude between one collar (16) and another collar (16) adjacent to an end collar (16a) is less than said tube pitch.
  6. Heat exchanger according to Claim 4, in combination with Claim 3, wherein said amplitude is in the order of said specific thickness.
  7. Heat exchanger according to any one of the preceding claims, the collecting plate (10) having a non-zero curvature in the direction of a width of the collecting plate.
  8. Heat exchanger according to any one of the preceding claims, wherein the pitch between two adjacent collars is constant and ranges between 5.5 mm and 10 mm, preferably between 6 mm and 8 mm.
  9. Heat exchanger according to any one of the preceding claims, comprising a peripheral seal ring borne by the end collars of the row of collars.
EP16723763.5A 2015-05-22 2016-05-20 Heat exchanger, in particular for a motor vehicle Active EP3298338B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1554659A FR3036469B1 (en) 2015-05-22 2015-05-22 COLLECTOR PLATE FOR HEAT EXCHANGER, IN PARTICULAR FOR MOTOR VEHICLE
PCT/EP2016/061371 WO2016188882A1 (en) 2015-05-22 2016-05-20 Collecting plate for a heat exchanger, in particular for a motor vehicle

Publications (2)

Publication Number Publication Date
EP3298338A1 EP3298338A1 (en) 2018-03-28
EP3298338B1 true EP3298338B1 (en) 2020-06-10

Family

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Application Number Title Priority Date Filing Date
EP16723763.5A Active EP3298338B1 (en) 2015-05-22 2016-05-20 Heat exchanger, in particular for a motor vehicle

Country Status (7)

Country Link
US (1) US10465997B2 (en)
EP (1) EP3298338B1 (en)
JP (1) JP2018515737A (en)
KR (1) KR20180008794A (en)
CN (1) CN107771269A (en)
FR (1) FR3036469B1 (en)
WO (1) WO2016188882A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3054653B1 (en) * 2016-07-29 2018-07-27 Valeo Systemes Thermiques COLLECTOR PLATE, COLLECTOR BOX AND HEAT EXCHANGER CORRESPONDING
US11029101B2 (en) * 2019-02-11 2021-06-08 Hanon Systems Reverse header design for thermal cycle
KR20240036850A (en) * 2022-09-14 2024-03-21 한온시스템 주식회사 Heat exchanger

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FR2570481B1 (en) * 1984-09-14 1988-09-09 Valeo COLLECTOR FOR HEAT EXCHANGER, AND HEAT EXCHANGER COMPRISING THE SAME
DE4305945A1 (en) * 1993-02-26 1994-09-01 Behr Gmbh & Co Heat exchanger, in particular for motor vehicles
FR2764054B1 (en) * 1997-05-28 1999-08-06 Valeo Thermique Moteur Sa HEAT EXCHANGER, PARTICULARLY CHARGING AIR COOLER FOR MOTOR VEHICLE, AND MANUFACTURING METHOD
JPH1183380A (en) * 1997-09-09 1999-03-26 Zexel Corp Header tank for heat exchanger
JP2004219044A (en) 2002-12-26 2004-08-05 Denso Corp Manufacturing method of heat exchanger and core plate
DE10343239B4 (en) * 2003-09-17 2021-09-09 Mahle International Gmbh Heat exchanger
JP2006189206A (en) * 2005-01-06 2006-07-20 Denso Corp Heat exchanger
US7413006B2 (en) * 2006-04-06 2008-08-19 Modine Manufacturing Company Header plate for use in a heat exchanger
DE102007028792A1 (en) * 2006-06-29 2008-01-31 Denso Corp., Kariya heat exchangers
US9470461B2 (en) * 2007-11-01 2016-10-18 Modine Manufacturing Company Heat exchanger with a tank reinforcement member
FR2938052B1 (en) * 2008-11-06 2013-04-26 Valeo Systemes Thermiques Branche Thermique Moteur GRIP COLLECTING PLATES FOR HEAT EXCHANGER COLLECTOR BOXES
CN101509732A (en) * 2009-03-12 2009-08-19 华南理工大学 Microchannel evaporator for uniformly distributing flow quantity
FR2958385B1 (en) * 2010-03-31 2013-01-18 Valeo Systemes Thermiques HEAT EXCHANGER WITH INCREASED PERFORMANCE
KR20120018607A (en) * 2010-08-23 2012-03-05 주식회사 경동나비엔 Structure for combination of heat exchanger
FR2977932A1 (en) * 2011-07-12 2013-01-18 Valeo Systemes Thermiques COLLECTOR BOX, HEAT EXCHANGER AND CORRESPONDING ASSEMBLY METHOD
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Also Published As

Publication number Publication date
EP3298338A1 (en) 2018-03-28
FR3036469A1 (en) 2016-11-25
US10465997B2 (en) 2019-11-05
US20180283806A1 (en) 2018-10-04
JP2018515737A (en) 2018-06-14
KR20180008794A (en) 2018-01-24
FR3036469B1 (en) 2017-06-09
CN107771269A (en) 2018-03-06
WO2016188882A1 (en) 2016-12-01

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