WO2024088857A1 - Heat exchanger having corrosion protection - Google Patents

Heat exchanger having corrosion protection Download PDF

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Publication number
WO2024088857A1
WO2024088857A1 PCT/EP2023/079029 EP2023079029W WO2024088857A1 WO 2024088857 A1 WO2024088857 A1 WO 2024088857A1 EP 2023079029 W EP2023079029 W EP 2023079029W WO 2024088857 A1 WO2024088857 A1 WO 2024088857A1
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WO
WIPO (PCT)
Prior art keywords
cheek
heat exchanger
plates
bundle
plate
Prior art date
Application number
PCT/EP2023/079029
Other languages
French (fr)
Inventor
Christophe Denoual
Christian Casenave
Alfy BELE-ZATA
Original Assignee
Valeo Systemes Thermiques
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 Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2024088857A1 publication Critical patent/WO2024088857A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/0056—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/004—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using protective electric currents, voltages, cathodes, anodes, electric short-circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • 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
    • F28F2275/04—Fastening; Joining by brazing
    • 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 present invention relates to the field of cooling circuits, and more specifically concerns a heat exchanger comprising a bundle of metal plates, in particular aluminum.
  • the invention finds particular application in the automotive field.
  • the heat exchangers fitted to the air conditioning loops of vehicles are arranged to allow the adjacent circulation in two separate spaces of two different fluids, in particular a heat transfer liquid and a refrigerant fluid, so as to carry out a heat exchange between these fluids, without mixing them. .
  • the fluids circulate under pressure.
  • a bundle of metal plates welded or brazed together forms an alternation of channels dedicated to the circulation of a heat transfer liquid and channels dedicated to the circulation of a refrigerating fluid, the channels being served by openings arranged in the plates.
  • heat exchanger Since such a heat exchanger is metallic, it is subject to corrosion. Indeed, in a cooling circuit of a motor vehicle, it is often integrated in a corrosive environment such as the engine compartment or a location under the vehicle chassis.
  • the present invention at least partly remedies the drawbacks of the prior art by providing a heat exchanger equipped with adjustable protection against external corrosion, making it possible to effectively slow down the rate of corrosion and increase the lifespan of the exchanger. compared to the same exchanger without this protection, while having adequate mechanical resistance.
  • the invention proposes a heat exchanger comprising a bundle of plates and at least one cheek bordering the bundle of plates, the material of the plates and of the cheek comprising at least aluminum, the heat exchanger being characterized in that it further comprises at least one additional plate secured to the cheek or to the bundle of plates and forming an electrical contact with the cheek or the bundle of plates, the additional plate comprising Zinc in a proportion between 0.5 and 1.8% of the mass of the additional plate.
  • the material of the plates and the cheek is preferably 1000 series, 3000 series or 6000 series aluminum.
  • a standard heat exchanger for countries whose climate is not conducive to corrosion is easily adapted to countries with a humid climate by brazing, welding or gluing the additional plate on the cheek or the bundle of plates of the heat exchanger according to the invention, this additional plate playing the role of sacrificial anode.
  • glue it is chosen to be conductive.
  • the additional plate is in electrical contact with the cheek or plates of the heat exchanger, either by direct contact with one of the cheeks or the bundle of plates, or by indirect contact via an intermediate conductive element such as glue or a mounting plate.
  • the plates of the plate bundle, the cheek and the additional plate are metallic in the sense that they comprise a majority of metal and are conductive. They can indeed contain, for example, a very thin portion of semiconductors.
  • the thickness of the additional plate is at least 0.5 millimeters, preferably between 0.5 and 3 millimeters, more preferably 1 millimeter. This thickness is adapted for example to the country for which the heat exchanger is intended, and to its dimensions, in particular depending on the thicknesses of the plates and the cheek of the heat exchanger.
  • the additional plate is brazed or welded to the cheek or to the bundle of plates. This brazing can thus be done during brazing of the plates of the heat exchanger and the cheek not yet brazed, which avoids an additional operation for the assembly of this additional plate.
  • the additional plate comprises a contact surface with the cheek, the contact surface representing at least 60% of an external surface of the cheek.
  • the cheek comprises fluidic connections intended to be connected to an external thermal management system
  • the additional plate covers a flat surface of the cheek included between the fluidic connections.
  • the additional plate uses an unused surface of the heat exchanger, in particular not usable for compacting a cooling system including the heat exchanger.
  • the heat exchanger comprises a metal mounting plate secured to the cheek and comprising a portion extending beyond the bundle of plates, the portion comprising means for fixing the heat exchanger, the additional plate is for example made of contact with the metal mounting plate.
  • the additional plate is itself a mounting plate of the heat exchanger comprising a portion extending beyond the bundle of plates, the portion comprising means for fixing the heat exchanger.
  • the mounting plate can be made entirely of the additional plate, or the mounting plate can be partly formed from the additional plate. This mounting plate is often dependent on specific integration in a given vehicle and can therefore be specific to a given climate.
  • the additional plate is in contact with at least 90% of a flat part of the end plate.
  • the additional plate can thus extend over a larger surface area of the heat exchanger, up to 100% of the flat part of the end plate.
  • the additional plate comprises indexing means capable of positioning the additional plate relative to the cheek or the bundle of plates.
  • indexing means are for example pins used to position the additional plate on the cheek or the bundle of plates before brazing the heat exchanger according to the invention.
  • the cheek comprises fluidic connections and the at least one additional plate is a first additional plate in electrical contact with the cheek, the heat exchanger comprising a second additional plate in electrical contact with a end plate of the bundle of plates opposite the cheek relative to the bundle of plates.
  • FIG. 1 represents in perspective a heat exchanger according to the invention, and in particular a side of this heat exchanger equipped with fluidic connections, in a first embodiment of the invention
  • FIG. 2 represents in perspective the heat exchanger of Figure i, so as to make visible an end plate of a bundle of plates of the heat exchanger, this end plate being opposite the cheek in relation to to the plate bundle, and
  • FIG. 3 schematically represents in exploded perspective a heat exchanger according to the invention, in a second embodiment of the invention.
  • a heat exchanger 2 according to the invention, comprises a bundle of plates 4 formed of metal plates brazed or welded together. They are, for example, composed of an aluminum alloy and other metals or semiconductors such as zinc, copper, silicon, etc.
  • Each plate extends in length in a longitudinal direction L and in width in a direction H orthogonal to the longitudinal direction L.
  • the plates are stacked on top of each other in a transverse direction T, the dimension of this stack corresponding to the thickness or smaller dimension of the bundle of plates 4.
  • the characteristics of the heat exchanger according to the invention follow the directions indicated to the manufacturing tolerances.
  • the plates are rectangular and flat except for their edges which are curved, within manufacturing tolerances.
  • these plates form, through openings in the plates, a heat transfer liquid inlet collector and a heat transfer liquid outlet collector, as well as a refrigerant fluid inlet collector and a fluid outlet collector. refrigerant.
  • the heat exchanger 2 comprises a cheek 6 bordering the bundle of plates 4 and allowing access to the heat transfer liquid inlet collector and the heat transfer liquid outlet collector via tubing respective 8 and 10.
  • the cheek 6 is also metallic, composed for example of an aluminum alloy and other metals or semiconductors such as zinc, copper, silicon, etc.
  • the cheek 6 is brazed or welded on a larger face of the bundle of plates 4.
  • the tubes 8 and 10 are also metallic and brazed or welded to the cheek 6.
  • the cheek 6 also includes a connection block 12 comprising access ports to the refrigerant inlet and outlet collectors.
  • This connection block 12 is also metallic and brazed or welded to the cheek 6.
  • the accesses to the collectors of the plate bundle 4 are not all arranged on the same face thereof.
  • the heat exchanger 2 comprises a mounting plate 14 brazed or welded to the cheek 6 on a first portion of this mounting plate 14.
  • This first portion is flat, and extends on the majority of the cheek 6, in particular on the one hand between the tubes 8, 10 and the connection block 12 and on the other hand between the tubes 8 and 10. This first portion is therefore in contact with the surface of the cheek 6 opposite the bundle of plates 4.
  • the mounting plate 14 has an overall square shape, a second portion of the mounting plate being orthogonal to the first portion and extending in the transverse and longitudinal directions, facing the thickness of the beam of plates 4 and beyond.
  • Fixing means 18, here a hole intended to receive a screw, are located on this second portion at a part thereof projecting longitudinally from the bundle of plates, and make it possible to fix the heat exchanger in a system cooling of a vehicle.
  • the mounting plate 14 has, for example, the same composition as the cheek 6 and is at least 0.5 millimeters thick, preferably between 0.5 and 3 millimeters, more preferably 1 millimeter.
  • the thickness of the first additional plate 16 is for example chosen according to the dimensions of the cheek 6, the bundle of plates 4 and the mounting plate 14.
  • This first additional plate 16 comprises Zinc in a proportion of between 0.5 and 1.8% of its mass.
  • the other components of this first additional plate 16 are for example other metals or semiconductors such as aluminum, silicon, etc.
  • the first additional plate 16 is in electrical contact with the cheek 6 and the bundle of plates 4 and makes it possible to serve as a sacrificial anode, its electrochemical potential being lower than that of aluminum, and therefore to protect the cheek 6 and the plate bundle 4 against corrosion.
  • the mounting plate 14 also contains Zinc in a proportion of between 0.5 and 1.8% of its mass and also serves as a sacrificial anode.
  • the mounting plate 14 can be made entirely from the additional plate 16, or the mounting plate 14 can be partly formed from the additional plate 16.
  • the heat exchanger 2 comprises a second additional plate 22 brazed or welded to an end plate 20 of the bundle of plates 4, opposite the cheek 6 with respect to the bundle of plates 4 More precisely, the second additional plate 22 is brazed or welded to a surface of the end plate 20 opposite the other plates of the plate bundle 4.
  • This second additional plate 22 contains Zinc in a proportion of between 0.5 and 1.8% of its mass.
  • the other components of this second additional plate 22 are for example other metals or semiconductors such as aluminum, silicon, etc.
  • the thickness of the additional plate 22 is at least 0.5 millimeters, preferably between 0.5 and 3 millimeters, depending on the thickness of the plates of the bundle of plates 4 in particular.
  • the additional plate 22 is here in contact with the entire flat part of the end plate 20. Alternatively, the additional plate does not cover this entire flat part but is thicker.
  • This second additional plate 22 also serves as a sacrificial anode against corrosion of the bundle of plates 4.
  • the heat exchanger 2 does not include this second additional plate 22, the first additional plate 16 being dimensioned to be sufficient to protect the assembly of cheek 6 and plate bundle 4 against corrosion.
  • a heat exchanger 30 according to the invention comprises, as in the first embodiment of the invention, the bundle of plates 4 and the cheek 6 bordering the bundle of plates 4. Only a few Plates from plate bundle 4 are shown for greater visibility.
  • the bundle of plates 4 also includes the end plate 20 opposite the cheek 6.
  • the heat exchanger 30 does not include a mounting plate.
  • the cheek 6 comprises indexing pins capable of being inserted into holes 172 of an additional plate 17 brazed or welded to the cheek 6, on a surface thereof opposite to the bundle of plates 4. These pins and these holes 172 therefore make it possible to position the additional plate 17 during its brazing or welding on the cheek 6.
  • the cheek comprises indexing cavities receiving indexing pins arranged on the additional plate 17.
  • the additional plate 17 covers most of the flat surface of the cheek 6 between the tubes 8,10 on the one hand and the connection block 12 on the other hand.
  • the thickness of the additional plate 17 is at least 0.5 millimeters, preferably between 0.5 and three millimeters thick, the cheek 6 being one millimeter thick, the end plate 20 of 1.5 millimeters thick and the intermediate plates 0.35 millimeters thick.
  • This additional plate 17 contains Zinc in a proportion of between 0.5 and 1.8% of its mass.
  • the other components of additional plate 17 are for example other metals or semiconductors such as aluminum, silicon, etc.
  • the additional plate 17 is in electrical contact with the cheek 6 and the bundle of plates 4 and makes it possible to serve as a sacrificial anode, its electrochemical potential being lower than that of aluminum, and therefore to protect the cheek 6 and the bundle of plates 4 against corrosion.
  • the end plate is in electrical contact with the cheek 6 and the bundle of plates 4 and makes it possible to serve as a sacrificial anode, its electrochemical potential being lower than that of aluminum, and therefore to protect the cheek 6 and the bundle of plates 4 against corrosion.
  • the heat exchanger 20 also includes an additional plate serving as a sacrificial anode, similar to the second additional plate 22 of the first embodiment of the invention.
  • the heat exchanger only includes the additional plate 17 as a sacrificial anode, the latter being dimensioned to protect all the plates of the plate bundle 4 and the cheek 6.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

The present invention relates to a heat exchanger (2) comprising a bundle (4) of plates and at least one flange (6) bordering the bundle (4) of plates, the material of the plates and of the flange (6) comprising at least aluminium, the heat exchanger (2) being characterised in that it further comprises at least one additional plate (14, 16) rigidly connected to the flange (6) or to the bundle (4) of plates and forming an electrical contact with the flange (6) or the bundle (4) of plates, the additional plate (14, 16) comprising zinc in a proportion of between 0.5 and 1.8% of the mass of the additional plate (14, 16).

Description

Echangeur thermique présentant une protection contre la corrosionHeat exchanger with protection against corrosion
La présente invention se rapporte au domaine des circuits de refroidissement, et concerne plus précisément un échangeur thermique comportant un faisceau de plaques métalliques, notamment en aluminium. L’invention trouve une application particulière dans le domaine automobile.The present invention relates to the field of cooling circuits, and more specifically concerns a heat exchanger comprising a bundle of metal plates, in particular aluminum. The invention finds particular application in the automotive field.
Les échangeurs thermiques équipant les boucles de climatisation des véhicules sont agencés pour permettre la circulation adjacente en deux espaces séparés de deux fluides différents, notamment un liquide caloporteur et un fluide réfrigérant, de manière à réaliser un échange de chaleur entre ces fluides, sans les mélanger. Au sein des échangeurs thermiques et des circuits thermodynamiques auxquels ils sont rattachés, les fluides circulent sous pression. The heat exchangers fitted to the air conditioning loops of vehicles are arranged to allow the adjacent circulation in two separate spaces of two different fluids, in particular a heat transfer liquid and a refrigerant fluid, so as to carry out a heat exchange between these fluids, without mixing them. . Within the heat exchangers and the thermodynamic circuits to which they are attached, the fluids circulate under pressure.
Dans un échangeur thermique à plaques, un faisceau de plaques métalliques soudées ou brasées entre elles forme une alternance de canaux dédiés à la circulation d’un liquide caloporteur et de canaux dédiés à la circulation d’un fluide réfrigérant, les canaux étant desservis par des ouvertures agencées dans les plaques. In a plate heat exchanger, a bundle of metal plates welded or brazed together forms an alternation of channels dedicated to the circulation of a heat transfer liquid and channels dedicated to the circulation of a refrigerating fluid, the channels being served by openings arranged in the plates.
Un tel échangeur thermique étant métallique, il est sujet à la corrosion. En effet dans un circuit de refroidissement d’un véhicule automobile, il est souvent intégré dans un environnement corrosif tel que le compartiment moteur ou un emplacement sous le châssis du véhicule. Since such a heat exchanger is metallic, it is subject to corrosion. Indeed, in a cooling circuit of a motor vehicle, it is often integrated in a corrosive environment such as the engine compartment or a location under the vehicle chassis.
La conception d’un tel échangeur thermique, et notamment la composition de ses plaques, sont néanmoins telles que la corrosion sur ce type d’échangeur thermique n’affecte généralement pas le bon fonctionnement du circuit de refroidissement pendant la durée de vie du véhicule. Le choix des matières utilisées pour réaliser les plaques de l’échangeur thermique tient compte du coût en résultant, de leur résistance à la corrosion externe et de leur résistance mécanique, notamment à la pression des fluides les traversant. Néanmoins dans certains pays du monde, au climat humide, un tel échangeur thermique peut amener à de graves problèmes de corrosion. Cependant pour des raisons de coûts, adapter la conception et la composition des plaques de l’échangeur thermique à tous les climats possibles n’est pas envisageable. The design of such a heat exchanger, and in particular the composition of its plates, are nevertheless such that corrosion on this type of heat exchanger does not generally affect the proper functioning of the cooling circuit during the life of the vehicle. The choice of materials used to make the heat exchanger plates takes into account the resulting cost, their resistance to external corrosion and their mechanical resistance, in particular to the pressure of the fluids passing through them. However, in certain countries around the world, with humid climates, such a heat exchanger can lead to serious corrosion problems. However, for cost reasons, adapting the design and composition of the heat exchanger plates to all possible climates is not possible.
La présente invention remédie au moins en partie aux inconvénients de la technique antérieure en fournissant un échangeur thermique équipé d’une protection modulable contre la corrosion externe, permettant de ralentir efficacement la vitesse de corrosion et d’augmenter la durée de vie de l’échangeur par rapport au même échangeur sans cette protection, tout en présentant une résistance mécanique adéquate. The present invention at least partly remedies the drawbacks of the prior art by providing a heat exchanger equipped with adjustable protection against external corrosion, making it possible to effectively slow down the rate of corrosion and increase the lifespan of the exchanger. compared to the same exchanger without this protection, while having adequate mechanical resistance.
A cet effet, l’invention propose un échangeur thermique comportant un faisceau de plaques et au moins une joue bordant le faisceau de plaques, le matériau des plaques et de la joue comportant au moins de l’aluminium, l’échangeur thermique étant caractérisé en ce qu’il comporte en outre au moins une plaque additionnelle solidarisée à la joue ou au faisceau de plaques et formant un contact électrique avec la joue ou le faisceau de plaques, la plaque additionnelle comportant du Zinc dans une proportion comprise entre 0,5 et 1,8% de la masse de la plaque additionnelle. For this purpose, the invention proposes a heat exchanger comprising a bundle of plates and at least one cheek bordering the bundle of plates, the material of the plates and of the cheek comprising at least aluminum, the heat exchanger being characterized in that it further comprises at least one additional plate secured to the cheek or to the bundle of plates and forming an electrical contact with the cheek or the bundle of plates, the additional plate comprising Zinc in a proportion between 0.5 and 1.8% of the mass of the additional plate.
Le matériau des plaques et de la joue est préférentiellement un aluminium de la série 1000, de la série 3000 ou de la série 6000. The material of the plates and the cheek is preferably 1000 series, 3000 series or 6000 series aluminum.
Grâce à l’invention, un échangeur thermique standard pour des pays dont le climat est peu propice à la corrosion, est facilement adapté à des pays au climat humide en brasant, soudant ou collant la plaque additionnelle sur la joue ou le faisceau de plaques de l’échangeur thermique selon l’invention, cette plaque additionnelle jouant le rôle d’anode sacrificielle. Dans le cas d’utilisation de colle, celle-ci est choisie conductrice. En effet la plaque additionnelle est en contact électrique avec la joue ou les plaques de l’échangeur thermique, soit par contact direct avec une des joues ou le faisceau de plaques, soit par contact indirect via un élément conducteur intermédiaire tel que de la colle ou une plaque de montage. Thanks to the invention, a standard heat exchanger for countries whose climate is not conducive to corrosion, is easily adapted to countries with a humid climate by brazing, welding or gluing the additional plate on the cheek or the bundle of plates of the heat exchanger according to the invention, this additional plate playing the role of sacrificial anode. When using glue, it is chosen to be conductive. In fact, the additional plate is in electrical contact with the cheek or plates of the heat exchanger, either by direct contact with one of the cheeks or the bundle of plates, or by indirect contact via an intermediate conductive element such as glue or a mounting plate.
Il est à noter que les plaques du faisceau de plaques, la joue et la plaque additionnelle sont métalliques dans le sens où elles comportent une majorité de métal et sont conductrices. Elles peuvent contenir en effet par exemple une très mince portion de semi-conducteurs. It should be noted that the plates of the plate bundle, the cheek and the additional plate are metallic in the sense that they comprise a majority of metal and are conductive. They can indeed contain, for example, a very thin portion of semiconductors.
Selon une caractéristique avantageuse de l’invention, l’épaisseur de la plaque additionnelle est d’au moins 0,5 millimètre, préférentiellement entre 0,5 et 3 millimètres, encore préférentiellement 1 millimètre. Cette épaisseur est adaptée par exemple au pays auquel est destiné l’échangeur thermique, et aux dimensions de celui-ci, notamment en fonction des épaisseurs des plaques et de la joue de l’échangeur thermique. According to an advantageous characteristic of the invention, the thickness of the additional plate is at least 0.5 millimeters, preferably between 0.5 and 3 millimeters, more preferably 1 millimeter. This thickness is adapted for example to the country for which the heat exchanger is intended, and to its dimensions, in particular depending on the thicknesses of the plates and the cheek of the heat exchanger.
Dans un mode de réalisation de l’invention, la plaque additionnelle est brasée ou soudée à la joue ou au faisceau de plaques. Ce brasage peut ainsi se faire lors du brasage des plaques de l’échangeur thermique et de la joue non encore brasées, ce qui évite une opération supplémentaire pour le montage de cette plaque additionnelle. In one embodiment of the invention, the additional plate is brazed or welded to the cheek or to the bundle of plates. This brazing can thus be done during brazing of the plates of the heat exchanger and the cheek not yet brazed, which avoids an additional operation for the assembly of this additional plate.
Préférentiellement, la plaque additionnelle comporte une surface de contact avec la joue, la surface de contact représentant au moins 60% d’une surface externe de la joue. Preferably, the additional plate comprises a contact surface with the cheek, the contact surface representing at least 60% of an external surface of the cheek.
Dans ce mode de réalisation de l’invention, la joue comporte des connexions fluidiques destinées à être raccordées à un système externe de gestion thermique, et la plaque additionnelle couvre une surface plane de la joue comprise entre les connexions fluidiques. Ainsi la plaque additionnelle utilise une surface non utilisée de l’échangeur thermique, notamment non exploitable pour compacter un système de refroidissement incluant l’échangeur thermique. In this embodiment of the invention, the cheek comprises fluidic connections intended to be connected to an external thermal management system, and the additional plate covers a flat surface of the cheek included between the fluidic connections. Thus the additional plate uses an unused surface of the heat exchanger, in particular not usable for compacting a cooling system including the heat exchanger.
Lorsque l’échangeur thermique comporte une plaque de montage métallique solidarisée à la joue et comportant une portion s’étendant au-delà du faisceau de plaques, la portion comportant des moyens de fixation de l’échangeur thermique, la plaque additionnelle est par exemple en contact avec la plaque de montage métallique. When the heat exchanger comprises a metal mounting plate secured to the cheek and comprising a portion extending beyond the bundle of plates, the portion comprising means for fixing the heat exchanger, the additional plate is for example made of contact with the metal mounting plate.
Dans une variante de réalisation de l’invention, la plaque additionnelle est elle-même une plaque de montage de l’échangeur thermique comportant une portion s’étendant au-delà du faisceau de plaques, la portion comportant des moyens de fixation de l’échangeur thermique. La plaque de montage peut être faite en totalité de la plaque additionnelle, ou bien la plaque de montage peut être en partie formée de la plaque additionnelle. Cette plaque de montage est souvent dépendante d’une intégration spécifique dans un véhicule donné et peut donc être spécifique à un climat donné. In a variant embodiment of the invention, the additional plate is itself a mounting plate of the heat exchanger comprising a portion extending beyond the bundle of plates, the portion comprising means for fixing the heat exchanger. The mounting plate can be made entirely of the additional plate, or the mounting plate can be partly formed from the additional plate. This mounting plate is often dependent on specific integration in a given vehicle and can therefore be specific to a given climate.
Dans une autre variante de réalisation de l’invention, dans laquelle le faisceau de plaques comporte une plaque d’extrémité opposée à la joue par rapport au faisceau de plaques, la joue comportant des connexions fluidiques, la plaque additionnelle est en contact avec au moins 90% d’une partie plane de la plaque d’extrémité. La plaque additionnelle peut ainsi s’étendre sur une surface plus grande de l’échangeur thermique, allant jusqu’à 100% de la partie plane de la plaque d’extrémité. In another alternative embodiment of the invention, in which the bundle of plates comprises an end plate opposite the cheek relative to the bundle of plates, the cheek comprising fluidic connections, the additional plate is in contact with at least 90% of a flat part of the end plate. The additional plate can thus extend over a larger surface area of the heat exchanger, up to 100% of the flat part of the end plate.
Avantageusement, la plaque additionnelle comporte des moyens d’indexage aptes à positionner la plaque additionnelle par rapport à la joue ou au faisceau de plaques. Ces moyens d’indexage sont par exemple des pions utilisés pour positionner la plaque additionnelle sur la joue ou le faisceau de plaques avant brasage de l’échangeur thermique selon l’invention. Advantageously, the additional plate comprises indexing means capable of positioning the additional plate relative to the cheek or the bundle of plates. These indexing means are for example pins used to position the additional plate on the cheek or the bundle of plates before brazing the heat exchanger according to the invention.
Dans un mode de réalisation de l’invention, la joue comporte des connexions fluidiques et l’au moins une plaque additionnelle est une première plaque additionnelle en contact électrique avec la joue, l’échangeur thermique comportant une deuxième plaque additionnelle en contact électrique avec une plaque d’extrémité du faisceau de plaques opposée à la joue par rapport au faisceau de plaques. Cette redondance des plaques additionnelles permet de renforcer la résistance à la corrosion de l’échangeur thermique et d’être moins limité par les dimensions de la joue ou des plaques. In one embodiment of the invention, the cheek comprises fluidic connections and the at least one additional plate is a first additional plate in electrical contact with the cheek, the heat exchanger comprising a second additional plate in electrical contact with a end plate of the bundle of plates opposite the cheek relative to the bundle of plates. This redundancy of the additional plates makes it possible to reinforce the corrosion resistance of the heat exchanger and to be less limited by the dimensions of the cheek or the plates.
D’autres caractéristiques et avantages de l’invention apparaîtront encore au travers de la description qui suit d’une part, et de plusieurs exemples de réalisation donnés à titre indicatif et non limitatif en référence aux dessins schématiques annexés d’autre part, sur lesquels : Other characteristics and advantages of the invention will appear further through the description which follows on the one hand, and several examples of embodiment given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which :
[fig 1] représente en perspective un échangeur thermique selon l’invention, et notamment une joue de cet échangeur thermique équipée de connexions fluidiques, dans un premier mode de réalisation de l’invention, [fig 2] représente en perspective l’échangeur thermique de la figure i, de manière à rendre visible une plaque d’extrémité d’un faisceau de plaques de l’échangeur thermique, cette plaque d’extrémité étant opposée à la joue par rapport au faisceau de plaques, et [fig 1] represents in perspective a heat exchanger according to the invention, and in particular a side of this heat exchanger equipped with fluidic connections, in a first embodiment of the invention, [fig 2] represents in perspective the heat exchanger of Figure i, so as to make visible an end plate of a bundle of plates of the heat exchanger, this end plate being opposite the cheek in relation to to the plate bundle, and
[fig 3] représente schématiquement en perspective éclatée un échangeur thermique selon l’invention, dans un deuxième mode de réalisation de l’invention. [fig 3] schematically represents in exploded perspective a heat exchanger according to the invention, in a second embodiment of the invention.
Selon un premier mode de réalisation de l’invention, un échangeur thermique 2 selon l’invention comporte un faisceau de plaques 4 formé de plaques métalliques brasées ou soudées entre elles. Elles sont par exemple composées d’un alliage d’aluminium et d’autres métaux ou semi-conducteurs tels que le zinc, le cuivre, le silicium, etc. According to a first embodiment of the invention, a heat exchanger 2 according to the invention comprises a bundle of plates 4 formed of metal plates brazed or welded together. They are, for example, composed of an aluminum alloy and other metals or semiconductors such as zinc, copper, silicon, etc.
Chaque plaque s’étend en longueur selon une direction longitudinale L et en largeur selon une direction H orthogonale à la direction longitudinale L. Les plaques sont empilées les unes sur les autres selon une direction transversale T, la dimension de cet empilement correspondant à l’épaisseur ou plus petite dimension du faisceau de plaques 4. Bien sûr dans cette demande, les caractéristiques de l’échangeur thermique selon l’invention suivent les directions indiquées aux tolérances de fabrication près. Par exemple les plaques sont rectangulaires et planes sauf en leurs bords qui sont recourbés, aux tolérances de fabrication près. Each plate extends in length in a longitudinal direction L and in width in a direction H orthogonal to the longitudinal direction L. The plates are stacked on top of each other in a transverse direction T, the dimension of this stack corresponding to the thickness or smaller dimension of the bundle of plates 4. Of course in this application, the characteristics of the heat exchanger according to the invention follow the directions indicated to the manufacturing tolerances. For example, the plates are rectangular and flat except for their edges which are curved, within manufacturing tolerances.
De manière connue, ces plaques forment, par des ouvertures dans les plaques, un collecteur d’entrée de liquide caloporteur et un collecteur de sortie de liquide caloporteur, ainsi qu’un collecteur d’entrée de fluide réfrigérant et un collecteur de sortie de fluide réfrigérant. In known manner, these plates form, through openings in the plates, a heat transfer liquid inlet collector and a heat transfer liquid outlet collector, as well as a refrigerant fluid inlet collector and a fluid outlet collector. refrigerant.
Dans ce premier mode de réalisation de l’invention, l’échangeur thermique 2 comporte une joue 6 bordant le faisceau de plaques 4 et permettant d’accéder au collecteur d’entrée de liquide caloporteur et au collecteur de sortie de liquide caloporteur par des tubulures respectives 8 et 10. La joue 6 est également métallique, composée par exemple d’un alliage d’aluminium et d’autres métaux ou semi-conducteurs tels que le zinc, le cuivre, le silicium, etc. La joue 6 est brasée ou soudée sur une face de plus grande dimension du faisceau de plaques 4. Les tubulures 8 et 10 sont également métalliques et brasées ou soudées à la joue 6. In this first embodiment of the invention, the heat exchanger 2 comprises a cheek 6 bordering the bundle of plates 4 and allowing access to the heat transfer liquid inlet collector and the heat transfer liquid outlet collector via tubing respective 8 and 10. The cheek 6 is also metallic, composed for example of an aluminum alloy and other metals or semiconductors such as zinc, copper, silicon, etc. The cheek 6 is brazed or welded on a larger face of the bundle of plates 4. The tubes 8 and 10 are also metallic and brazed or welded to the cheek 6.
La joue 6 comporte également un bloc de connexion 12 comportant des bouches d’accès aux collecteurs d’entrée et de sortie de fluide réfrigérant. Ce bloc de connexion 12 est également métallique et brasé ou soudé à la joue 6. En variante les accès aux collecteurs du faisceau de plaques 4 ne sont pas tous agencés sur une même face de celui-ci. The cheek 6 also includes a connection block 12 comprising access ports to the refrigerant inlet and outlet collectors. This connection block 12 is also metallic and brazed or welded to the cheek 6. Alternatively, the accesses to the collectors of the plate bundle 4 are not all arranged on the same face thereof.
Dans ce premier mode de réalisation de l’invention, l’échangeur thermique 2 comporte une plaque de montage 14 brasée ou soudée à la joue 6 sur une première portion de cette plaque de montage 14. Cette première portion est plane, et s’étend sur la majeure partie de la joue 6, notamment d’une part entre les tubulures 8, 10 et le bloc de connexion 12 et d’autre part entre les tubulures 8 et 10. Cette première portion est donc au contact de la surface de la joue 6 opposée au faisceau de plaques 4. In this first embodiment of the invention, the heat exchanger 2 comprises a mounting plate 14 brazed or welded to the cheek 6 on a first portion of this mounting plate 14. This first portion is flat, and extends on the majority of the cheek 6, in particular on the one hand between the tubes 8, 10 and the connection block 12 and on the other hand between the tubes 8 and 10. This first portion is therefore in contact with the surface of the cheek 6 opposite the bundle of plates 4.
La plaque de montage 14 présente une forme globale en équerre, une deuxième portion de la plaque de montage étant orthogonale à la première portion et s’étendant dans les directions transversale et longitudinale, en vis- à-vis de l’épaisseur du faisceau de plaques 4 et au-delà. Des moyens de fixation 18, ici un trou destiné à recevoir une vis, sont situés sur cette deuxième portion au niveau d’une partie de celle-ci faisant saillie longitudinalement du faisceau de plaques, et permettent de fixer l’échangeur thermique dans un système de refroidissement d’un véhicule. The mounting plate 14 has an overall square shape, a second portion of the mounting plate being orthogonal to the first portion and extending in the transverse and longitudinal directions, facing the thickness of the beam of plates 4 and beyond. Fixing means 18, here a hole intended to receive a screw, are located on this second portion at a part thereof projecting longitudinally from the bundle of plates, and make it possible to fix the heat exchanger in a system cooling of a vehicle.
La plaque de montage 14 a par exemple la même composition que la joue 6 et fait au moins 0,5 millimètre d’épaisseur, préférentiellement entre 0,5 et 3 millimètres, encore préférentiellement 1 millimètre. The mounting plate 14 has, for example, the same composition as the cheek 6 and is at least 0.5 millimeters thick, preferably between 0.5 and 3 millimeters, more preferably 1 millimeter.
Une première plaque additionnelle 16 d’au moins 0,5 millimètre d’épaisseur, préférentiellement entre 0,5 et 3 millimètres d’épaisseur, est également brasée ou soudée à la plaque de montage 14, sur une partie plane de la plaque de montage 14 brasée avec la joue 6, donc prise en tenaille entre la première plaque additionnelle 16 et la joue 6. Plus précisément la première plaque additionnelle 16 couvre la majeure partie de la plaque de montage 14, donc de la surface plane de la joue 6, comprise entre les tubulures 8,10 d’une part et le bloc de connexion 12 d’autre part. L’épaisseur de la première plaque additionnelle 16 est par exemple choisie en fonction des dimensions de la joue 6, du faisceau de plaques 4 et de la plaque de montage 14. A first additional plate 16 of at least 0.5 millimeters thick, preferably between 0.5 and 3 millimeters thick, is also brazed or welded to the mounting plate 14, on a flat part of the mounting plate 14 brazed with the cheek 6, therefore gripped between the first additional plate 16 and the cheek 6. More precisely the first additional plate 16 covers the majority of the mounting plate 14, therefore of the flat surface of the cheek 6, between the pipes 8.10 on the one hand and the connection block 12 on the other hand. The thickness of the first additional plate 16 is for example chosen according to the dimensions of the cheek 6, the bundle of plates 4 and the mounting plate 14.
Cette première plaque additionnelle 16 comporte du Zinc dans une proportion comprise entre 0,5 et 1,8% de sa masse. Les autres composantes de cette première plaque additionnelle 16 sont par exemple d’autres métaux ou semi-conducteurs tels que de l’aluminium, du silicium, etc. This first additional plate 16 comprises Zinc in a proportion of between 0.5 and 1.8% of its mass. The other components of this first additional plate 16 are for example other metals or semiconductors such as aluminum, silicon, etc.
Ainsi la première plaque additionnelle 16 est en contact électrique avec la joue 6 et le faisceau de plaques 4 et permet de servir d’anode sacrificielle, son potentiel électrochimique étant plus bas que celui de l’aluminium, et donc de protéger la joue 6 et le faisceau de plaques 4 contre la corrosion. Thus the first additional plate 16 is in electrical contact with the cheek 6 and the bundle of plates 4 and makes it possible to serve as a sacrificial anode, its electrochemical potential being lower than that of aluminum, and therefore to protect the cheek 6 and the plate bundle 4 against corrosion.
En variante, la plaque de montage 14 comporte également du Zinc dans une proportion comprise entre 0,5 et 1,8% de sa masse et sert aussi d’anode sacrificielle. Dans cette variante, la plaque de montage 14 peut être faite en totalité de la plaque additionnelle 16, ou bien la plaque de montage 14 peut être en partie formée de la plaque additionnelle 16. Alternatively, the mounting plate 14 also contains Zinc in a proportion of between 0.5 and 1.8% of its mass and also serves as a sacrificial anode. In this variant, the mounting plate 14 can be made entirely from the additional plate 16, or the mounting plate 14 can be partly formed from the additional plate 16.
Dans ce premier mode de réalisation de l’invention, l’échangeur thermique 2 comporte une deuxième plaque additionnelle 22 brasée ou soudée à une plaque d’extrémité 20 du faisceau de plaques 4, opposée à la joue 6 par rapport au faisceau de plaques 4. Plus précisément la deuxième plaque additionnelle 22 est brasée ou soudée à une surface de la plaque d’extrémité 20 opposée aux autres plaques du faisceau de plaques 4. In this first embodiment of the invention, the heat exchanger 2 comprises a second additional plate 22 brazed or welded to an end plate 20 of the bundle of plates 4, opposite the cheek 6 with respect to the bundle of plates 4 More precisely, the second additional plate 22 is brazed or welded to a surface of the end plate 20 opposite the other plates of the plate bundle 4.
Cette deuxième plaque additionnelle 22 comporte du Zinc dans une proportion comprise entre 0,5 et 1,8% de sa masse. Les autres composantes de cette deuxième plaque additionnelle 22 sont par exemple d’autres métaux ou semi-conducteurs tels que de l’aluminium, du silicium, etc. L’épaisseur de la plaque additionnelle 22 est d’au moins à 0,5 millimètres, préférentiellement entre 0,5 et 3 millimètres, en fonction de l’épaisseur des plaques du faisceau de plaques 4 notamment. La plaque additionnelle 22 est ici en contact avec toute la partie plane de la plaque d’extrémité 20. En variante, la plaque additionnelle ne couvre pas toute cette partie plane mais est plus épaisse. Cette deuxième plaque additionnelle 22 sert également d’anode sacrificielle contre la corrosion du faisceau de plaques 4. En variante, l’échangeur thermique 2 ne comporte pas cette deuxième plaque additionnelle 22, la première plaque additionnelle 16 étant dimensionnée pour suffire à protéger l’ensemble de la joue 6 et le faisceau de plaques 4 contre la corrosion. This second additional plate 22 contains Zinc in a proportion of between 0.5 and 1.8% of its mass. The other components of this second additional plate 22 are for example other metals or semiconductors such as aluminum, silicon, etc. The thickness of the additional plate 22 is at least 0.5 millimeters, preferably between 0.5 and 3 millimeters, depending on the thickness of the plates of the bundle of plates 4 in particular. The additional plate 22 is here in contact with the entire flat part of the end plate 20. Alternatively, the additional plate does not cover this entire flat part but is thicker. This second additional plate 22 also serves as a sacrificial anode against corrosion of the bundle of plates 4. Alternatively, the heat exchanger 2 does not include this second additional plate 22, the first additional plate 16 being dimensioned to be sufficient to protect the assembly of cheek 6 and plate bundle 4 against corrosion.
Selon un deuxième mode de réalisation représenté figure 3, un échangeur thermique 30 selon l’invention comporte, comme dans le premier mode de réalisation de l’invention, le faisceau de plaques 4 et la joue 6 bordant le faisceau de plaques 4. Seules quelques plaques du faisceau de plaques 4 sont représentées pour plus de visibilité. Le faisceau de plaques 4 comporte également la plaque d’extrémité 20 opposée à la joue 6. According to a second embodiment shown in Figure 3, a heat exchanger 30 according to the invention comprises, as in the first embodiment of the invention, the bundle of plates 4 and the cheek 6 bordering the bundle of plates 4. Only a few Plates from plate bundle 4 are shown for greater visibility. The bundle of plates 4 also includes the end plate 20 opposite the cheek 6.
A la différence du premier mode de réalisation de l’invention, dans ce deuxième mode de réalisation de l’invention, l’échangeur thermique 30 ne comporte pas de plaque de montage. De plus la joue 6 comporte des pions d’indexage aptes à s’insérer dans des trous 172 d’une plaque additionnelle 17 brasée ou soudée à la joue 6, sur une surface de celle-ci opposée au faisceau de plaques 4. Ces pions et ces trous 172 permettent donc de positionner la plaque additionnelle 17 lors de son brasage ou de son soudage sur la joue 6. En variante la joue comporte des cavités d’indexage recevant des pions d’indexage disposés sur la plaque additionnelle 17. Unlike the first embodiment of the invention, in this second embodiment of the invention, the heat exchanger 30 does not include a mounting plate. In addition, the cheek 6 comprises indexing pins capable of being inserted into holes 172 of an additional plate 17 brazed or welded to the cheek 6, on a surface thereof opposite to the bundle of plates 4. These pins and these holes 172 therefore make it possible to position the additional plate 17 during its brazing or welding on the cheek 6. Alternatively, the cheek comprises indexing cavities receiving indexing pins arranged on the additional plate 17.
Dans ce deuxième mode de réalisation de l’invention, la plaque additionnelle 17 couvre la majeure partie de la surface plane de la joue 6 comprise entre les tubulures 8,10 d’une part et le bloc de connexion 12 d’autre part. L’épaisseur de la plaque additionnelle 17 est d’au moins 0,5 millimètres, préférentiellement entre 0,5 et trois 3 millimètres d’épaisseur, la joue 6 étant d’un millimètre d’épaisseur, la plaque d’extrémité 20 de 1,5 millimètres d’épaisseur et les plaques intermédiaires de 0,35 millimètre d’épaisseur.In this second embodiment of the invention, the additional plate 17 covers most of the flat surface of the cheek 6 between the tubes 8,10 on the one hand and the connection block 12 on the other hand. The thickness of the additional plate 17 is at least 0.5 millimeters, preferably between 0.5 and three millimeters thick, the cheek 6 being one millimeter thick, the end plate 20 of 1.5 millimeters thick and the intermediate plates 0.35 millimeters thick.
Cette plaque additionnelle 17 comporte du Zinc dans une proportion comprise entre 0,5 et 1,8% de sa masse. Les autres composantes de plaque additionnelle 17 sont par exemple d’autres métaux ou semi-conducteurs tels que de l’aluminium, du silicium, etc. Ainsi la plaque additionnelle 17 est en contact électrique avec la joue 6 et le faisceau de plaques 4 et permet de servir d’anode sacrificielle, son potentiel électrochimique étant plus bas que celui de l’aluminium, et donc de protéger la joue 6 et le faisceau de plaques 4 contre la corrosion. Dans ce deuxième mode de réalisation de l’invention, la plaque d’extrémitéThis additional plate 17 contains Zinc in a proportion of between 0.5 and 1.8% of its mass. The other components of additional plate 17 are for example other metals or semiconductors such as aluminum, silicon, etc. Thus the additional plate 17 is in electrical contact with the cheek 6 and the bundle of plates 4 and makes it possible to serve as a sacrificial anode, its electrochemical potential being lower than that of aluminum, and therefore to protect the cheek 6 and the bundle of plates 4 against corrosion. In this second embodiment of the invention, the end plate
20 comporte également une plaque additionnelle servant d’anode sacrificielle, similaire à la deuxième plaque additionnelle 22 du premier mode de réalisation de l’invention. En variante l’échangeur thermique ne comporte que la plaque additionnelle 17 comme anode sacrificielle, celle-ci étant dimensionnée pour protéger l’ensemble des plaques du faisceau de plaques 4 et la joue 6. 20 also includes an additional plate serving as a sacrificial anode, similar to the second additional plate 22 of the first embodiment of the invention. As a variant, the heat exchanger only includes the additional plate 17 as a sacrificial anode, the latter being dimensioned to protect all the plates of the plate bundle 4 and the cheek 6.
Bien sûr, l’invention n’est pas limitée aux exemples qui viennent d’être décrits et de nombreux aménagements peuvent être apportés à ces exemples sans sortir du cadre de l’invention. Notamment les caractéristiques des différents modes ou variantes de réalisation peuvent être combinées pour réaliser l’invention, dans la mesure où ces modes ou variantes ne sont pas incompatibles entre eux. Of course, the invention is not limited to the examples which have just been described and numerous adjustments can be made to these examples without departing from the scope of the invention. In particular, the characteristics of the different modes or variants of embodiment can be combined to carry out the invention, to the extent that these modes or variants are not incompatible with each other.

Claims

REVENDICATIONS
1- Echangeur thermique (2, 30) comportant un faisceau de plaques (4) et au moins une joue (6) bordant le faisceau de plaques (4), le matériau des plaques et de la joue (6) comportant au moins de l’aluminium, l’échangeur thermique (2, 30) étant caractérisé en ce qu’il comporte en outre au moins une plaque additionnelle (14, 16, 17, 22) solidarisée à la joue (6) ou au faisceau de plaques (4) et formant un contact électrique avec la joue (6) ou le faisceau de plaques (4), la plaque additionnelle (14, 16, 17, 22) comportant du Zinc dans une proportion comprise entre 0,5 et 1,8% de la masse de la plaque additionnelle (14, 16, 17, 22). 1- Heat exchanger (2, 30) comprising a bundle of plates (4) and at least one cheek (6) bordering the bundle of plates (4), the material of the plates and the cheek (6) comprising at least aluminum, the heat exchanger (2, 30) being characterized in that it further comprises at least one additional plate (14, 16, 17, 22) secured to the cheek (6) or to the bundle of plates (4 ) and forming electrical contact with the cheek (6) or the bundle of plates (4), the additional plate (14, 16, 17, 22) comprising Zinc in a proportion of between 0.5 and 1.8% of the mass of the additional plate (14, 16, 17, 22).
2- Echangeur thermique (2, 30) selon la revendication 1, dans lequel l’épaisseur de la plaque additionnelle (14, 16, 17, 22) est d’au moins 0,5 millimètre. 2- Heat exchanger (2, 30) according to claim 1, in which the thickness of the additional plate (14, 16, 17, 22) is at least 0.5 millimeter.
3- Echangeur thermique (2, 30) selon la revendication 1 ou 2, dans lequel la plaque additionnelle (14, 17, 22) est brasée ou soudée à la joue (6) ou au faisceau de plaques (4). 3- Heat exchanger (2, 30) according to claim 1 or 2, in which the additional plate (14, 17, 22) is brazed or welded to the cheek (6) or to the bundle of plates (4).
4- Echangeur thermique (2, 30) selon l’une quelconque des revendications 1 à 3, dans lequel la plaque additionnelle (14, 17) comporte une surface de contact avec la joue (6), la surface de contact représentant au moins 60% d’une surface externe de la joue (6). 4- Heat exchanger (2, 30) according to any one of claims 1 to 3, in which the additional plate (14, 17) comprises a contact surface with the cheek (6), the contact surface representing at least 60 % of an external surface of the cheek (6).
5- Echangeur thermique (2, 30) selon l’une quelconque des revendications 1 à 4, dans lequel la joue (6) comporte des connexions fluidiques (8, 10, 12) destinées à être raccordées à un système externe de gestion thermique, et dans lequel la plaque additionnelle (14, 16, 17) couvre une surface plane de la joue comprise entre les connexions fluidiques (8, 10, 12). 5- Heat exchanger (2, 30) according to any one of claims 1 to 4, in which the cheek (6) comprises fluidic connections (8, 10, 12) intended to be connected to an external thermal management system, and in which the additional plate (14, 16, 17) covers a flat surface of the cheek between the fluidic connections (8, 10, 12).
6- Echangeur thermique (2) selon l’une quelconque des revendications 1 à 5, dans lequel la plaque additionnelle (14) est une plaque de montage de l’échangeur thermique (2) comportant une portion s’étendant au-delà du faisceau de plaques (4), la portion comportant des moyens de fixation (18) de l’échangeur thermique (2). 7- Echangeur thermique (2) selon la revendication 1 ou 2, dans lequel l’échangeur thermique (2) comporte une plaque de montage (14) métallique solidarisée à la joue (6) et comportant une portion s’étendant au-delà du faisceau de plaques (4), la portion comportant des moyens de fixation (18) de l’échangeur thermique (2), et dans lequel la plaque additionnelle (16) est en contact avec la plaque de montage (14) métallique. 6- Heat exchanger (2) according to any one of claims 1 to 5, in which the additional plate (14) is a mounting plate of the heat exchanger (2) comprising a portion extending beyond the beam of plates (4), the portion comprising fixing means (18) of the heat exchanger (2). 7- Heat exchanger (2) according to claim 1 or 2, in which the heat exchanger (2) comprises a metal mounting plate (14) secured to the cheek (6) and comprising a portion extending beyond the bundle of plates (4), the portion comprising fixing means (18) of the heat exchanger (2), and in which the additional plate (16) is in contact with the metal mounting plate (14).
8- Echangeur thermique (2, 30) selon l’une quelconque des revendications 1 à 3, dans lequel le faisceau de plaques (4) comporte une plaque d’extrémité (20) opposée à la joue (6) par rapport au faisceau de plaques (4), la joue (6) comportant des connexions fluidiques (8, 10, 12), et dans lequel la plaque additionnelle (22) est en contact avec au moins 90% d’une partie plane de la plaque d’extrémité (20). 8- Heat exchanger (2, 30) according to any one of claims 1 to 3, in which the bundle of plates (4) comprises an end plate (20) opposite the cheek (6) relative to the bundle of plates (4), the cheek (6) comprising fluidic connections (8, 10, 12), and in which the additional plate (22) is in contact with at least 90% of a flat part of the end plate (20).
9- Echangeur thermique (2, 30) selon l’une quelconque des revendications 1 à 8, dans lequel la joue (6) comporte des connexions fluidiques (8, 10, 12) et dans lequel l’au moins une plaque additionnelle est une première plaque additionnelle (14, 16, 17) en contact électrique avec la joue (6), l’échangeur thermique (2, 30) comportant une deuxième plaque additionnelle (22) en contact électrique avec une plaque d’extrémité (20) du faisceau de plaques (4) opposée à la joue (6) par rapport au faisceau de plaques (4). 9- Heat exchanger (2, 30) according to any one of claims 1 to 8, in which the cheek (6) comprises fluidic connections (8, 10, 12) and in which the at least one additional plate is a first additional plate (14, 16, 17) in electrical contact with the cheek (6), the heat exchanger (2, 30) comprising a second additional plate (22) in electrical contact with an end plate (20) of the bundle of plates (4) opposite the cheek (6) relative to the bundle of plates (4).
10- Echangeur thermique (30) selon l’une quelconque des revendications 1 à 9, dans lequel la plaque additionnelle (17) comporte des moyens d’indexage (172) aptes à positionner la plaque additionnelle (17) par rapport à la joue (6) ou au faisceau de plaques (4). 10- Heat exchanger (30) according to any one of claims 1 to 9, in which the additional plate (17) comprises indexing means (172) capable of positioning the additional plate (17) relative to the cheek ( 6) or to the plate bundle (4).
PCT/EP2023/079029 2022-10-28 2023-10-18 Heat exchanger having corrosion protection WO2024088857A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR2211330 2022-10-28
FR2211330A FR3141514A1 (en) 2022-10-28 2022-10-28 Heat exchanger with protection against corrosion

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WO2024088857A1 true WO2024088857A1 (en) 2024-05-02

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10185490A (en) * 1996-12-18 1998-07-14 Tennex:Kk Oil cooler
JPH10246595A (en) * 1997-03-05 1998-09-14 Tennex:Kk Oil cooler for vehicle
US20070039717A1 (en) * 2005-08-19 2007-02-22 Denso Corporation Heat exchanger unit and method of manufacturing the same
US20120205069A1 (en) * 2005-10-05 2012-08-16 Pascal Bradu Reinforcement for Dish Plate Heat Exchangers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10185490A (en) * 1996-12-18 1998-07-14 Tennex:Kk Oil cooler
JPH10246595A (en) * 1997-03-05 1998-09-14 Tennex:Kk Oil cooler for vehicle
US20070039717A1 (en) * 2005-08-19 2007-02-22 Denso Corporation Heat exchanger unit and method of manufacturing the same
US20120205069A1 (en) * 2005-10-05 2012-08-16 Pascal Bradu Reinforcement for Dish Plate Heat Exchangers

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