EP2764313A1 - Heat exchanger with stacked plates - Google Patents

Heat exchanger with stacked plates

Info

Publication number
EP2764313A1
EP2764313A1 EP12769093.1A EP12769093A EP2764313A1 EP 2764313 A1 EP2764313 A1 EP 2764313A1 EP 12769093 A EP12769093 A EP 12769093A EP 2764313 A1 EP2764313 A1 EP 2764313A1
Authority
EP
European Patent Office
Prior art keywords
reinforcement
exchanger
housing
plates
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12769093.1A
Other languages
German (de)
French (fr)
Inventor
Demetrio ONETTI
Nicolas Vallee
Sory SIDIBE
Yann Pichenot
Romain DEHAINE
Patrick Da Silva
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 SAS filed Critical Valeo Systemes Thermiques SAS
Publication of EP2764313A1 publication Critical patent/EP2764313A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/02—Reinforcing means for casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/14—Safety or protection arrangements; Arrangements for preventing malfunction for preventing damage by freezing, e.g. for accommodating volume expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements

Definitions

  • the present invention relates to a stacked plate heat exchanger.
  • the invention applies to any type of heat exchanger, especially for a motor vehicle, such as for example exchangers intended to be mounted in the engine compartment of the vehicle such as charge air coolers (RAS) or exchangers recirculation of the engine exhaust gas, also called EGR (Exhaust Gas Recirculation Coolers or EGRC).
  • RAS charge air coolers
  • EGR exhaust Gas Recirculation Coolers
  • heat exchangers comprising a heat exchange bundle having a series of plates stacked parallel to one another above.
  • the plate stack forms heat exchange surfaces, between which a fluid to be cooled and a cooling fluid circulate, in alternating layers, in fluid passage circuits, interleaves that can be provided to improve the exchange of heat. heat between the fluid to be cooled and the cooling fluid.
  • the stack of the plates is thus configured to define two different circuits: that of the fluid to be cooled and that of the cooling fluid.
  • the plates are provided with punctured stamped pockets allowing a circulation of the cooling fluid perpendicularly to the plane of the plate for the passage of said coolant from one coolant circulation layer to the other without communicating with the fluid circulation layer to be cooled located between the two.
  • the invention aims to improve the situation. It proposes for this purpose a stacked plate heat exchanger, comprising a housing inside which there is a plurality of stacked plates intended to allow a heat exchange between a first and a second fluid flowing in contact with said plates, said plates comprising an area designed to undergo thermal variations that can create mechanical stresses, called the stress zone.
  • said exchanger comprises a reinforcement in contact with said stress zone and the housing.
  • the reinforcement makes it possible to stiffen the stress zone, thereby limiting the risk of breakage that may occur there.
  • the plates are arranged in pairs, each pair of plates defining a flow layer of the first fluid, each plate comprising a zone, called the stamped zone, provided with stamped pockets for the passage of the first fluid of a circulation layer of the first fluid to another layer, said stress zone corresponding to said stamped zone.
  • the reinforcement then makes it possible to reinforce the zone of the plates where the pockets are located stamped.
  • the pockets are, for example, punctured perpendicular to the planes in which the plates extend.
  • said exchanger comprises a heat exchange zone intended to promote heat exchange between the first and second fluid, and a bypass zone capable of allowing the second fluid to bypass the zone.
  • heat exchange said bypass zone corresponding to said stress zone, said reinforcement leaving free circulation of the second fluid over the entire exchange zone.
  • the reinforcement only covers the stress zone, that is to say the bypass zone or the embossed zone, without exceeding in the heat exchange zone in order to reinforce the stress zone without disturbing the inlet second fluid in the exchange zone.
  • the plates comprise, at the level of the stress zone, a folded edge extending in a plane perpendicular to a plane in which the plates extend so that the contact between the reinforcement and the stresses is done at least through the folded edge. The folded edges thus allow the contact between the reinforcement and the plates to be plane to plane. They improve the mechanical maintenance of the reinforcement on the plates made, in particular, by brazing.
  • said housing comprises two side walls coming opposite a peripheral edge of the plates, a bottom wall and / or an upper wall, located at the top and at the base of the plurality of plates.
  • the housing may comprise, for example, four so-called upper, right, lower and left walls, said walls being interconnected so as to form an internal volume within which the plurality of plates is located.
  • the reinforcement is in contact with one of the side walls of the housing, located near the stress zone. It is, in particular, the wall left of the case which is located near the stress zone.
  • proximity here means a distance of between 0 and 30 mm.
  • the reinforcement is in contact with the upper wall and / or the lower wall.
  • the reinforcement may also be in contact with the left wall, the upper wall and the bottom wall of the housing so as to increase the solidification it provides to the stress zone.
  • the reinforcement is continuous from an upper edge to a lower edge of said reinforcement so that it is in contact with all said plates.
  • the upper wall of the housing comprises a first housing receiving said reinforcement.
  • the upper wall of the housing receives in particular the upper edge of the reinforcement.
  • the side wall of the housing in contact with said reinforcement comprises a second housing receiving said reinforcement.
  • the first housing and / or the second housing can preposition the reinforcement on the housing before joining it to the latter, for example, by brazing.
  • an upper and / or lower end of the reinforcement comprises a first flange, extending in a plane parallel to the plane in which the upper and lower walls of the casing extend, so that the contact between the reinforcement and the upper wall and / or between the reinforcement and the lower wall is plane to plane.
  • a lateral end of the reinforcement comprises a second flange, extending in a plane parallel to the plane in which the lateral wall of the housing in contact with said reinforcement extends so that the contact between the reinforcement and the wall of the housing contact with said reinforcement is plan on plan.
  • the first and / or second wings make it possible to improve the mechanical retention of the reinforcement on the housing by means of the wall of the housing in contact with said reinforcement, its upper wall and / or its lower wall by increasing the surface area. intended to be brazed between the reinforcement and the housing.
  • a vertex of the reinforcement comprises a protuberance conforming to an upper part of the side wall of the housing in contact with said reinforcement.
  • the reinforcement comprises at least one clip stapling on the housing.
  • the staples staple for example, on the left wall, the top wall and / or the bottom wall. They thus facilitate the prepositioning of the reinforcement on the housing while improving the mechanical support of the reinforcement on the housing.
  • the reinforcement is a separate part of the housing.
  • the reinforcement is a piece integral with the housing.
  • the reinforcement is, for example, integral with the left wall, the top wall and / or the bottom wall of the housing.
  • FIG. 1 is a perspective view illustrating an exploded heat exchanger according to the invention
  • FIG. 2 is a perspective view of a side portion of the housing and associated plates
  • FIG. 3 is a perspective view of a lower or upper portion of the housing and associated plates, the reinforcement is not shown;
  • - Figure 4 is a view similar to Figure 2 showing an alternative embodiment;
  • FIG. 5 is a perspective view of a lateral edge of the exchanger
  • FIG. 6 is a perspective view of a portion of a lateral edge of the exchanger illustrating a variant of FIG.
  • the invention relates to a heat exchanger 1 enabling a heat exchange between a first fluid, in particular a coolant C and a second fluid that will be called a fluid to be cooled G, for example a gas .
  • a first fluid in particular a coolant C
  • a second fluid that will be called a fluid to be cooled G, for example a gas .
  • It may be a charge air cooler in which a flow of compressed air for supplying a heat engine, for example a motor vehicle engine, is cooled by a cooling liquid, in particular a mixture of water and glycol.
  • the exchanger 1 comprises a heat exchange bundle 2 comprising a stack of plates 4 intended to allow a heat exchange between the cooling liquid C and the fluid to be cooled G flowing in contact with the plates 4.
  • the plates 4 determine between alternating circuits 6, 8 for the fluid to be cooled G and for the coolant C.
  • the bundle 2 is here of generally parallelepipedal shape and has an inlet face 10 and an opposite, non-visible, outlet face of the fluid to cool G. It is completed on both sides of the stack of a plate, said upper, 12 and a plate, said lower, 14.
  • the exchanger 1 comprises a housing 5 in which the beam 2 is located. It guides the fluid to be cooled G between the plates 4 of the inlet face 10 to the exit face of the bundle 2. It here comprises four so-called upper 23, right 19, lower 22 and left 18 walls, interconnected to form an internal volume within which is the plurality of plates 4.
  • the left wall 18 comes into contact with a first peripheral edge 16, plates 4, 12, 14, the right wall 19 comes into contact with a second peripheral edge 16 ', plates 4, 12, 14, the upper wall 23, located at the top of the stack of plates, comes into contact of the upper plate 12 and the lower wall 22, situated at the base of the stack of plates, comes into contact with the lower plate 14.
  • the upper wall 23 may be provided with orifices 24, 26 allowing passage, as input and at the outlet, coolant C in the bundle 2.
  • the exchanger 1 may also comprise nozzles 28, 30 for the outlet and / or inlet of the cooling liquid C communicating with orifices 24, 26 provided in the casing 5.
  • the various components of the exchanger are, for example, aluminum or aluminum alloy. They are, in particular, soldered to each other.
  • Each plate 4, 12, 14 comprises, for example, a bottom 31, substantially plane, surrounded by a peripheral edge 32 terminated by a flat portion 34, for brazing the plates together.
  • the coolant circuit 8 C is defined, on the one hand, by the peripheral edge 32 and, on the other hand, by one or more edges 60, 60 ', for example derived from material of the bottom 31 of the plate.
  • the plates 4, 12, 14 are grouped in pairs and assembled by their flats 34 and / or the edges 60, 60 '. In this way, the circuit of the upper plate and the lower plate of a pair of plates are added to form a coolant flow channel C. Each pair of plates thus defines a flow layer of the first fluid C
  • the circuits 6 for the circulation of the fluid to be cooled are provided between two plates 4 vis-à-vis two pairs of adjacent plates 4.
  • top 12 and bottom 14 plates are assembled with the top 23 and bottom 22 walls of the housing to define a coolant flow channel C.
  • the plates 4 have, for example, the general shape of an elongated rectangle having two long sides and two short sides, each plate having two stamped pockets 38, a first of the pockets having an inlet 40 of the circuit 8 and the other of the pockets having an outlet 42 of the circuit 8 for circulating coolant C.
  • the pockets 38 are here pierced with a passage 50 for passage of the coolant oriented perpendicular to the bottom 31 of the plates and are intended to come into contact with the pockets 38 of an adjacent plate 4 to form an inlet manifold, not visible, and an outlet manifold 44, not visible, for the cooling fluid.
  • the pockets 38 thus allow the first fluid to pass from one layer to another, that is to say from one pair of plates to another.
  • the inlet manifold opens, for example, into the inlet pipe 28 through the inlet orifice 24 of the housing and / or the outlet manifold opens, for example, into the outlet pipe 30 through the output 26 of the housing 5.
  • the cooling fluid enters the beam 2 through the inlet pipe 28 and is distributed between the plates 4 in the circuits 8 for circulating coolant C by the inlet manifold. It flows into the coolant circulation circuits C from their inlets 40 to their outlets 42 where it enters the outlet manifold 44. It then exits the exchanger 1 through the outlet pipe 30 .
  • the pockets 38 are located along the same small side of the plates 4, 12, 14 located on the left in Figure 1, that is to say near the first peripheral edge 16 of the plates 4, 12, 14.
  • the pockets 38 of two pairs of plates 4 determine between them the height of the circulation circuits 6 for the fluid to be cooled G.
  • the exchanger 1 then comprises a heat exchange zone facilitating the exchange of heat between the coolant C and the coolant G which extends between the pockets 38 and the second peripheral edge 16 'of the plates 4.
  • the zone where the pockets 38 are located that is to say the zone near the first peripheral edge of the plates, called the stamped zone, is an area likely to allow the second fluid to bypass the heat exchange zone.
  • An inlet manifold and an outlet manifold may be adapted to the periphery of the housing to bring and evacuate the fluid to be cooled.
  • the exchanger may also include secondary exchange surfaces, for example, corrugated disruptors (referenced 55 in Figure 5) reported between the plates 4 in the circulation circuits 6 of the fluid to be cooled G. These disrupters can disrupt the flow of the fluid to be cooled G so as to improve the heat exchange between the two fluids.
  • Each plate 4, 12, 14 for example comprises corrugations 52 arranged in the circuits 8 for circulating coolant C. These corrugations 52 extend between the pockets 38 constituting the inlet manifold and the outlet manifold 44 of the liquid C and the second peripheral edge 16 'of the plates 4, 12, 14.
  • the corrugations 52 are, for example, derived from the bottom material 31 of the plates 4, 12, 14, in particular by stamping the plates 4, 12, 14 .
  • the coolant circulation circuit 8 defined by the plates 4, 12, 14 makes it possible to guide the cooling liquid in a number n of successive passes, here four, in which the liquid flows between the inlet 40 and the outlet 42 of said circuit. Two adjacent passes are separated, for example, by the borders 60, 60 'of the plates 4, 12, 14.
  • the passes are arranged parallel to each other in a direction of extension, here the large side of the plates 4, 12, 14. They may be provided in series one after the other.
  • edges 60, 60 ' are thus oriented along the long side of the plates 4 to define a coil circulation of the coolant C in each of the passes of each of the circulation circuits 8 of the coolant flow C.
  • Some 60 of the edges s' extend from the first peripheral edge 16 of the plates 4, 12, 14 to the second peripheral edge 16 'of the plates 4, 12, 14 while leaving a passage for fluid to flow from the pass from one side of the border 60 to the other pass. They alternate with edges 60 'extending from the second peripheral edge 16' of the plates 4, 12, 14 towards the first peripheral edge 16 of the plates 4, 12, 14 while leaving a passage for the fluid to flow. of the pass lying on one side of the border 60 'to the other.
  • the circulation of the fluid to be cooled G in the circulation circuits 6 of the fluid to be cooled is effected in a direction generally perpendicular to that of the flow of the cooling liquid C, that is to say of the front face of the beam 2 to its back side.
  • the zone of the exchanger where the pockets 38 are located is liable to be subjected to large thermal variations since the temperature of the coolant entering or leaving can vary considerably and in a reduced time depending on the use desired heat exchanger. These sudden thermal variations are likely to create stresses greater than the stresses experienced by the rest of the exchanger.
  • This stamped zone of the exchanger where the pockets 38 are located and subjected to high stresses is also called the stress zone 70.
  • the stress zone 70 is thus located near the first peripheral edge 16 of the plates 4, 12, 14, and that is to say at a distance of between 0 and 30 mm.
  • the exchanger comprises a reinforcement 71 in contact with the stress zone 70 and the housing 5.
  • the reinforcement 71 here takes the form of a wall which extends in a plane perpendicular to the planes in which extend the left wall 18 and the upper wall 23 of the housing 5.
  • the reinforcement 71 is, for example, in contact with the entire stress zone 70. It is in contact with the housing 5, in particular, through the left wall 18 and the upper wall 23 and / or the lower wall 22.
  • the reinforcement 71 is here a separate piece of the housing 5 but it could also be integral with the housing 5, for example, with the left wall 18, with the lower wall 22 and / or with the upper wall 23.
  • the reinforcement 71 of the invention is illustrated in more detail in FIG. 2.
  • the reinforcement 71 here takes the form of an L-shaped wall. Indeed, a left-hand lateral end 61 of the reinforcement 71 comprises a wing 72 s extending in a plane parallel to the plane in which the left wall 18 of the casing 5 extends. In this way, the contact between the reinforcement 71 and the left wall 18 of the casing 5 is a plane-to-plane contact which facilitates, in particular, brazing between the reinforcement 71 and the housing 5.
  • FIG. 3 illustrates another aspect of the invention according to which the plates 4, 12, 14 comprise folded edges 75 at the level of the stress zone 70.
  • the folded edges 75 take birth near the first peripheral edge 16 plates 4, 12, 14 at a lateral end 65 of the plates 4, 12, 14 located on the side of the inlet face of the fluid to be cooled. They extend parallel to the stamped pockets 38 that is to say in a plane perpendicular to the plane in which the bottom of the plates 4, 12, 14 extends, that is to say a plane parallel to the plane in which extends the reinforcement.
  • the folded edges 75 take birth especially at the flats 34 peripheral edges of the plates 4, 12, 41. In this way the contact between the reinforcement and the stress zone 70 is at least via the folded edges 75.
  • the upper wall 23 of the housing 5 comprises, for example, a first housing 76 receiving the upper end of the reinforcement.
  • This first housing 76 takes the form of a groove extending from one end of the upper wall 23 in contact with the left wall, directed towards the bundle and extending above the stress zone 70.
  • This first housing 76 allows pre position the reinforcement on the housing 5 and maintain it in a correct position to perform the brazing operation.
  • An identical housing may also be provided on the left wall (said second housing), and / or on the bottom wall and perform the same function as the first housing 76, namely to allow prepositioning the reinforcement on the housing 5 and maintain it in a correct position to perform the brazing operation.
  • FIG. 4 shows the reinforcement 71 in an embodiment where it comprises an outgrowth 80 situated at the upper end 62 of the reinforcement 71 and protruding with respect to the left-hand lateral end 61 of the reinforcement 71 in contact with the left wall 18 of the housing 5.
  • the protrusion 80 here marries an upper portion 81 of the left wall 18 of the housing 5.
  • the protrusion 80 has a curved portion conforming to the upper portion 81 of the left wall 18 also curved. This protrusion 80 allows, in particular, to limit the entry of the fluid to be cooled in the bypass zone, that is to say the stress zone of the exchanger.
  • FIG. 5 shows an exemplary embodiment in which the reinforcement 71 is continuous from an upper edge to a lower edge of the reinforcement, that is to say from the upper wall 23 to the bottom wall 22 of the housing 5.
  • the reinforcement 71 is thus in contact with all the plates 4, 12, 14. It then makes it possible to reinforce the entire stress zone of the exchanger 1. It can also be noted in this figure that the reinforcement 71 leaves free circulation of the fluid to be cooled over the entire heat exchange zone.
  • the reinforcement 71 is thus in contact at its left-hand lateral end with the left wall 18 of the housing 5 and continues inwardly of the bundle 2, its right-hand lateral end 63 stopping at the boundary between the bypass zone and the heat exchange zone, without exceeding in the heat exchange zone that is to say at the limit between the stress zone and the rest of the exchanger.
  • the reinforcement 71 may also comprise, as illustrated in FIGS. 5 and 6, staples 85.
  • These staples 85 are, for example, located at the left-hand lateral end 61 of the reinforcement 71 (FIG. 5) so as to staple. on the left wall of the housing 5. They are, in particular, located on the upper end of the reinforcement 71 (FIG. 6) so as to be stuck on the upper wall 23 of the housing 5.
  • the staples 85 are stuck on the left wall 18, on the bottom wall 22 and / or on the upper wall 23 of the housing 5 at the notches 86 present on the housing.
  • the staples 85 thus penetrate the notches 86 and have a folded portion 87 in contact with a face of the left wall 18 opposite the face of the left wall 18 with which the reinforcement 71 is in contact so as to pinch the left wall 18 .
  • These staples 85 serve to maintain the mechanical strength of the reinforcement 71 on the housing 5 in particular to optimize the soldering process between these two elements.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to a heat exchanger (1) with stacked plates, comprising a box (5) inside of which are located a plurality of stacked plates (4, 12, 14) intended to enable an exchange of heat between a first and a second fluid (C, G) circulating in contact with said plates (4, 12, 14), said plates (4, 12, 14) comprising an area intended to withstand heat variations that may cause mechanical stress, referred to as the stress area (70). According to the invention, said exchanger (1) comprises a reinforcement (71) in contact with said stress area (70) and with the box (5).

Description

Echanqeur de chaleur à plaques empilées.  Stacked plate heat exchanger.
La présente invention concerne un échangeur de chaleur à plaques empilées. L'invention s'applique à tout type d'échangeurs de chaleur, notamment pour véhicule automobile, comme par exemple des échangeurs destinés à être montés dans le compartiment moteur du véhicule tels que des refroidisseurs d'air de suralimentation (RAS) ou des échangeurs de recirculation des gaz d'échappement du moteur, appelés également échangeurs EGR (Exhaust Gas Recirculation Coolers ou EGRC). The present invention relates to a stacked plate heat exchanger. The invention applies to any type of heat exchanger, especially for a motor vehicle, such as for example exchangers intended to be mounted in the engine compartment of the vehicle such as charge air coolers (RAS) or exchangers recirculation of the engine exhaust gas, also called EGR (Exhaust Gas Recirculation Coolers or EGRC).
Dans ce domaine, il est connu des échangeurs de chaleur comprenant un faisceau d'échange de chaleur comportant une série de plaques empilées parallèlement les unes au dessus des autres. L'empilement de plaque forme des surfaces d'échange de chaleur, entre lesquelles un fluide à refroidir et un fluide de refroidissement circulent, en couches alternées, dans des circuits de passage des fluides, des intercalaires pouvant être prévus pour améliorer l'échange de chaleur entre le fluide à refroidir et le fluide de refroidissement. L'empilement des plaques est ainsi configuré de façon à définir deux circuits différents : celui du fluide à refroidir et celui du fluide de refroidissement. In this field, it is known heat exchangers comprising a heat exchange bundle having a series of plates stacked parallel to one another above. The plate stack forms heat exchange surfaces, between which a fluid to be cooled and a cooling fluid circulate, in alternating layers, in fluid passage circuits, interleaves that can be provided to improve the exchange of heat. heat between the fluid to be cooled and the cooling fluid. The stack of the plates is thus configured to define two different circuits: that of the fluid to be cooled and that of the cooling fluid.
Sur ces échangeurs, les plaques sont pourvues de poches embouties crevées permettant une circulation du fluide de refroidissement perpendiculairement au plan de la plaque pour le passage dudit liquide de refroidissement d'une couche de circulation du liquide de refroidissement à l'autre sans communiquer avec la couche de circulation de fluide à refroidir situé entre les deux. On these exchangers, the plates are provided with punctured stamped pockets allowing a circulation of the cooling fluid perpendicularly to the plane of the plate for the passage of said coolant from one coolant circulation layer to the other without communicating with the fluid circulation layer to be cooled located between the two.
Des contraintes mécaniques spécifiques se produisent au niveau de ces poches embouties définissant le circuit du fluide de refroidissement, notamment lors des essais de choc thermique. En effet, la température du liquide de refroidissement entrant et sortant de l'échangeur au niveau de ces poches varie énormément et dans une période très courte ce qui provoque des phénomènes de dilatation thermique différentielle sur l'échangeur. On observe alors un risque de rupture de liaison au niveau des poches embouties de deux plaques adjacentes ce qui peut engendrer une fuite du liquide de refroidissement dans l'échangeur. Specific mechanical stresses occur in these stamped pockets defining the cooling fluid circuit, especially during thermal shock tests. Indeed, the temperature of the coolant entering and leaving the exchanger at these pockets varies enormously and in a very short period which causes differential thermal expansion phenomena on the exchanger. There is a risk of a break in connection with level of the stamped pockets of two adjacent plates which can cause leakage of the coolant in the exchanger.
Cette problématique est encore plus importante lorsque les plaques doivent subir des phénomènes de corrosion externe (pour les gaz EGR) et/ou de corrosion interne (pour le circuit du fluide de refroidissement) qui nécessitent l'utilisation de matière spécifique ayant des caractéristiques mécaniques réduites. This problem is even more important when the plates must undergo external corrosion phenomena (for EGR gases) and / or internal corrosion (for the cooling fluid circuit) that require the use of specific material with reduced mechanical characteristics. .
Une solution connue pour pallier à ce problème est d'augmenter les épaisseurs des plaques mais cela à un impact défavorable en termes de coût et de packaging. A known solution to overcome this problem is to increase the thickness of the plates but this has an adverse impact in terms of cost and packaging.
L'invention vise à améliorer la situation. Elle propose à cet effet un échangeur de chaleur à plaques empilées, comprenant un boîtier à l'intérieur duquel se trouve une pluralité de plaques empilées destinée à permettre un échange de chaleur entre un premier et un deuxième fluide circulant au contact desdites plaques, lesdites plaques comprenant une zone destinée à subir des variations thermiques susceptibles de créer des contraintes mécaniques, dite zone de contraintes. The invention aims to improve the situation. It proposes for this purpose a stacked plate heat exchanger, comprising a housing inside which there is a plurality of stacked plates intended to allow a heat exchange between a first and a second fluid flowing in contact with said plates, said plates comprising an area designed to undergo thermal variations that can create mechanical stresses, called the stress zone.
Selon l'invention, ledit échangeur comprend un renfort en contact avec ladite zone de contraintes et le boîtier. Ainsi, le renfort permet de rigidifier la zone de contraintes en limitant donc les risques de ruptures pouvant advenir à cet endroit. According to the invention, said exchanger comprises a reinforcement in contact with said stress zone and the housing. Thus, the reinforcement makes it possible to stiffen the stress zone, thereby limiting the risk of breakage that may occur there.
Selon un aspect de l'invention, les plaques sont agencées par paire, chaque paire de plaque définissant une couche de circulation du premier fluide, chaque plaque comprenant une zone, dite zone emboutie, munie de poches embouties pour le passage du premier fluide d'une couche de circulation du premier fluide à une autre couche, ladite zone de contraintes correspondant à ladite zone emboutie. Le renfort permet alors de renforcer la zone des plaques où se situent les poches embouties. Les poches sont, par exemple, crevées perpendiculairement aux plans dans lequel s'étendent les plaques. According to one aspect of the invention, the plates are arranged in pairs, each pair of plates defining a flow layer of the first fluid, each plate comprising a zone, called the stamped zone, provided with stamped pockets for the passage of the first fluid of a circulation layer of the first fluid to another layer, said stress zone corresponding to said stamped zone. The reinforcement then makes it possible to reinforce the zone of the plates where the pockets are located stamped. The pockets are, for example, punctured perpendicular to the planes in which the plates extend.
Selon un autre aspect de l'invention, ledit échangeur comprend une zone d'échange de chaleur destinée à favoriser l'échange de chaleur entre le premier et le deuxième fluide, et une zone de contournement susceptible de permettre au deuxième fluide de contourner la zone d'échange de chaleur, ladite zone de contournement correspondant à ladite zone de contraintes, ledit renfort laissant libre la circulation du deuxième fluide sur l'ensemble de la zone d'échange. Ainsi, le renfort couvre uniquement la zone de contraintes, c'est-à-dire la zone de contournement ou encore la zone emboutie, sans dépasser dans la zone d'échange de chaleur afin de renforcer la zone de contraintes sans perturber l'entrée du deuxième fluide dans la zone d'échange. Selon un exemple de réalisation, les plaques comprennent, au niveau de la zone de contraintes, un bord plié s'étendant selon un plan perpendiculaire à un plan dans lequel s'étendent les plaques de sorte que le contact entre le renfort et la zone de contraintes se fait au moins par l'intermédiaire du bord plié. Les bords pliés permettent ainsi que le contact entre le renfort et les plaques soit plan sur plan. Ils améliorent le maintient mécanique du renfort sur les plaques effectué, notamment, par brasage. According to another aspect of the invention, said exchanger comprises a heat exchange zone intended to promote heat exchange between the first and second fluid, and a bypass zone capable of allowing the second fluid to bypass the zone. heat exchange, said bypass zone corresponding to said stress zone, said reinforcement leaving free circulation of the second fluid over the entire exchange zone. Thus, the reinforcement only covers the stress zone, that is to say the bypass zone or the embossed zone, without exceeding in the heat exchange zone in order to reinforce the stress zone without disturbing the inlet second fluid in the exchange zone. According to an exemplary embodiment, the plates comprise, at the level of the stress zone, a folded edge extending in a plane perpendicular to a plane in which the plates extend so that the contact between the reinforcement and the stresses is done at least through the folded edge. The folded edges thus allow the contact between the reinforcement and the plates to be plane to plane. They improve the mechanical maintenance of the reinforcement on the plates made, in particular, by brazing.
Selon un autre exemple de réalisation, ledit boîtier comprend deux parois latérales venant en vis-à-vis d'un bord périphérique des plaques, une paroi inférieure et/ou une paroi supérieure, situées au sommet et à la base de la pluralité de plaques empilées. Plus précisément, le boîtier pourra comprendre, par exemple, quatre parois dites supérieure, droite, inférieure et gauche, lesdites parois étant reliées entre elles de manière à former un volume interne à l'intérieur duquel se trouve la pluralité de plaques. According to another exemplary embodiment, said housing comprises two side walls coming opposite a peripheral edge of the plates, a bottom wall and / or an upper wall, located at the top and at the base of the plurality of plates. stacked. More specifically, the housing may comprise, for example, four so-called upper, right, lower and left walls, said walls being interconnected so as to form an internal volume within which the plurality of plates is located.
Avantageusement, le renfort est en contact avec l'une des parois latérales du boîtier, située à proximité de la zone de contraintes. C'est, notamment, la paroi gauche du boîtier qui est située à proximité de la zone de contraintes. On entend ici par proximité, une distance comprise entre 0 et 30 mm. Advantageously, the reinforcement is in contact with one of the side walls of the housing, located near the stress zone. It is, in particular, the wall left of the case which is located near the stress zone. The term "proximity" here means a distance of between 0 and 30 mm.
Selon un exemple de réalisation, le renfort est au contact de la paroi supérieure et/ou de la paroi inférieure. Le renfort pourra d'ailleurs être en contact avec la paroi gauche, la paroi supérieure et la paroi inférieure du boîtier de façon à augmenter la solidification qu'il procure à la zone de contraintes. According to an exemplary embodiment, the reinforcement is in contact with the upper wall and / or the lower wall. The reinforcement may also be in contact with the left wall, the upper wall and the bottom wall of the housing so as to increase the solidification it provides to the stress zone.
Avantageusement, le renfort est continu d'un bord supérieur à un bord inférieur dudit renfort de sorte qu'il est en contact avec toutes lesdites plaques. Advantageously, the reinforcement is continuous from an upper edge to a lower edge of said reinforcement so that it is in contact with all said plates.
Selon un aspect de l'invention, la paroi supérieure du boîtier comprend un premier logement recevant ledit renfort. La paroi supérieure du boîtier reçoit en particulier le bord supérieur du renfort. Avantageusement, la paroi latérale du boîtier en contact avec ledit renfort comprend un deuxième logement recevant ledit renfort. En plus d'augmenter le maintient mécanique du renfort sur le boîtier, ce premier logement et/ou ce deuxième logement permettent de pré positionner le renfort sur le boîtier avant de le solidariser à ce dernier, par exemple, par brasage. Selon un autre aspect de l'invention, une extrémité supérieure et/ou inférieure du renfort comprend une première aile, s'étendant dans un plan parallèle au plan dans lequel s'étendent les parois supérieure et inférieure du boîtier de sorte que le contact entre le renfort et la paroi supérieure et/ou entre le renfort et la paroi inférieure est plan sur plan. Avantageusement, une extrémité latérale du renfort comprend une deuxième aile, s'étendant dans un plan parallèle au plan dans lequel s'étend la paroi latérale du boîtier en contact avec ledit renfort de sorte que le contact entre le renfort et la paroi du boîtier en contact avec ledit renfort est plan sur plan. Ainsi, la première et/ou la deuxième ailes permettent d'améliorer le maintient mécanique du renfort sur le boîtier par l'intermédiaire de la paroi du boîtier en contact avec ledit renfort , sa paroi supérieure et/ou sa paroi inférieure en augmentant la surface destinée à être brasée entre le renfort et le boîtier. Selon un exemple de réalisation, un sommet du renfort comprend une excroissance épousant une partie supérieure de la paroi latérale du boîtier en contact avec ledit renfort. Selon un autre exemple de réalisation, le renfort comprend au moins une agrafe venant s'agrafer sur le boîtier. Les agrafes viennent s'agrafer, par exemple, sur la paroi gauche, la paroi supérieure et/ou la paroi inférieure. Elles permettent ainsi de faciliter le pré positionnement du renfort sur le boîtier tout en améliorant le maintient mécanique du renfort sur le boîtier. According to one aspect of the invention, the upper wall of the housing comprises a first housing receiving said reinforcement. The upper wall of the housing receives in particular the upper edge of the reinforcement. Advantageously, the side wall of the housing in contact with said reinforcement comprises a second housing receiving said reinforcement. In addition to increasing the mechanical support of the reinforcement on the housing, the first housing and / or the second housing can preposition the reinforcement on the housing before joining it to the latter, for example, by brazing. According to another aspect of the invention, an upper and / or lower end of the reinforcement comprises a first flange, extending in a plane parallel to the plane in which the upper and lower walls of the casing extend, so that the contact between the reinforcement and the upper wall and / or between the reinforcement and the lower wall is plane to plane. Advantageously, a lateral end of the reinforcement comprises a second flange, extending in a plane parallel to the plane in which the lateral wall of the housing in contact with said reinforcement extends so that the contact between the reinforcement and the wall of the housing contact with said reinforcement is plan on plan. Thus, the first and / or second wings make it possible to improve the mechanical retention of the reinforcement on the housing by means of the wall of the housing in contact with said reinforcement, its upper wall and / or its lower wall by increasing the surface area. intended to be brazed between the reinforcement and the housing. According to an exemplary embodiment, a vertex of the reinforcement comprises a protuberance conforming to an upper part of the side wall of the housing in contact with said reinforcement. According to another exemplary embodiment, the reinforcement comprises at least one clip stapling on the housing. The staples staple, for example, on the left wall, the top wall and / or the bottom wall. They thus facilitate the prepositioning of the reinforcement on the housing while improving the mechanical support of the reinforcement on the housing.
Selon un aspect de l'invention, le renfort est une pièce distincte du boîtier. According to one aspect of the invention, the reinforcement is a separate part of the housing.
Selon un autre aspect de l'invention, le renfort est une pièce venue de matière avec le boîtier. Le renfort est, par exemple, venu de matière avec la paroi gauche, la paroi supérieure et/ou la paroi inférieure du boîtier. According to another aspect of the invention, the reinforcement is a piece integral with the housing. The reinforcement is, for example, integral with the left wall, the top wall and / or the bottom wall of the housing.
L'invention concerne aussi un module d'admission d'air pour moteur de véhicule automobile comprenant un échangeur tel que décrit précédemment. Dans le but de faciliter la description de ce qui a été exposé précédemment, on joint des dessins dans lesquels sont représentés, sous forme schématique et uniquement à titre d'exemple non limitatif, des cas pratiques de réalisation de l'échangeur de chaleur à plaques empilées de l'invention. Dans ces dessins: - la figure 1 est une vue en perspective illustrant de façon éclatée un échangeur de chaleur conforme à l'invention ; The invention also relates to an air intake module for a motor vehicle engine comprising an exchanger as described above. In order to facilitate the description of what has been explained above, drawings are enclosed in which are shown, in schematic form and by way of non-limiting example only, practical examples of embodiment of the plate heat exchanger. stacked of the invention. In these drawings: FIG. 1 is a perspective view illustrating an exploded heat exchanger according to the invention;
- la figure 2 est une vue en perspective d'une partie latérale du boîtier et des plaques associées ; - Figure 2 is a perspective view of a side portion of the housing and associated plates;
- la figure 3 est une vue en perspective d'une partie inférieure ou supérieure du boîtier et des plaques associées, le renfort n'étant pas représenté ; - la figure 4 est une vue similaire à la figure 2 représentant une variante de réalisation ; - Figure 3 is a perspective view of a lower or upper portion of the housing and associated plates, the reinforcement is not shown; - Figure 4 is a view similar to Figure 2 showing an alternative embodiment;
- la figure 5 est une vue en perspective d'un bord latéral de l'échangeur et FIG. 5 is a perspective view of a lateral edge of the exchanger and
- la figure 6 est une vue en perspective d'une partie d'un bord latéral de l'échangeur illustrant une variante de la figure 5. FIG. 6 is a perspective view of a portion of a lateral edge of the exchanger illustrating a variant of FIG.
Comme illustré à la figure 1 , l'invention concerne un échangeur de chaleur 1 permettant un échange de chaleur entre un premier fluide, notamment un liquide de refroidissement C et un deuxième fluide que l'on appellera fluide à refroidir G, par exemple un gaz. Il pourra s'agir d'un refroidisseur d'air de suralimentation dans lequel un flux d'air comprimé, destiné à alimenter un moteur thermique, par exemple un moteur de véhicule automobile, est refroidi par un liquide de refroidissement, notamment un mélange d'eau et de glycol. As illustrated in FIG. 1, the invention relates to a heat exchanger 1 enabling a heat exchange between a first fluid, in particular a coolant C and a second fluid that will be called a fluid to be cooled G, for example a gas . It may be a charge air cooler in which a flow of compressed air for supplying a heat engine, for example a motor vehicle engine, is cooled by a cooling liquid, in particular a mixture of water and glycol.
L'échangeur 1 comprend un faisceau 2 d'échange de chaleur comportant un empilement de plaques 4 destiné à permettre un échange de chaleur entre le liquide de refroidissement C et le fluide à refroidir G circulant au contact des plaques 4. Les plaques 4 déterminent entre elles des circuits 6, 8 alternés pour le fluide à refroidir G et pour le liquide de refroidissement C. Le faisceau 2 est ici de forme globalement parallélépipédique et présente une face d'entrée 10 et une face de sortie opposée, non visible, du fluide à refroidir G. Il est terminé de part et d'autre de l'empilement d'une plaque, dite supérieure, 12 et d'une plaque, dite inférieure, 14. The exchanger 1 comprises a heat exchange bundle 2 comprising a stack of plates 4 intended to allow a heat exchange between the cooling liquid C and the fluid to be cooled G flowing in contact with the plates 4. The plates 4 determine between alternating circuits 6, 8 for the fluid to be cooled G and for the coolant C. The bundle 2 is here of generally parallelepipedal shape and has an inlet face 10 and an opposite, non-visible, outlet face of the fluid to cool G. It is completed on both sides of the stack of a plate, said upper, 12 and a plate, said lower, 14.
L'échangeur 1 comprend un boîtier 5 dans lequel le faisceau 2 est situé. Il guide le fluide à refroidir G entre les plaques 4 de la face d'entrée 10 à la face de sortie du faisceau 2. Il comprend ici quatre parois dites supérieure 23, droite 19, inférieure 22 et gauche 18, reliées entre elles de manière à former un volume interne à l'intérieur duquel se trouve la pluralité de plaques 4. La paroi gauche 18 vient en contact avec un premier bord périphérique 16, des plaques 4, 12, 14, la paroi droite 19 vient en contact avec un deuxième bord périphérique 16', des plaques 4, 12, 14, la paroi supérieure 23, située au sommet de l'empilement de plaques, vient au contact de la plaque supérieure 12 et la paroi inférieure 22, située à la base de l'empilement de plaques, vient au contact de la plaque inférieure 14. La paroi supérieure 23 pourra être munie d'orifices 24, 26 permettant le passage, en entrée et en sortie, du liquide de refroidissement C dans le faisceau 2. The exchanger 1 comprises a housing 5 in which the beam 2 is located. It guides the fluid to be cooled G between the plates 4 of the inlet face 10 to the exit face of the bundle 2. It here comprises four so-called upper 23, right 19, lower 22 and left 18 walls, interconnected to form an internal volume within which is the plurality of plates 4. The left wall 18 comes into contact with a first peripheral edge 16, plates 4, 12, 14, the right wall 19 comes into contact with a second peripheral edge 16 ', plates 4, 12, 14, the upper wall 23, located at the top of the stack of plates, comes into contact of the upper plate 12 and the lower wall 22, situated at the base of the stack of plates, comes into contact with the lower plate 14. The upper wall 23 may be provided with orifices 24, 26 allowing passage, as input and at the outlet, coolant C in the bundle 2.
L'échangeur 1 pourra encore comprendre de tubulures 28, 30 de sortie et/ou d'entrée du liquide de refroidissement C communiquant avec des orifices 24, 26 prévus dans le boîtier 5. Les différents composants de l'échangeur sont, par exemple, en aluminium ou alliage d'aluminium. Ils sont, notamment, brasés entre eux. The exchanger 1 may also comprise nozzles 28, 30 for the outlet and / or inlet of the cooling liquid C communicating with orifices 24, 26 provided in the casing 5. The various components of the exchanger are, for example, aluminum or aluminum alloy. They are, in particular, soldered to each other.
Chaque plaque 4, 12, 14 comporte, par exemple, un fond 31 , sensiblement plan, entouré par une bordure périphérique 32 terminée par un méplat 34, permettant le brasage des plaques entre elles. Le circuit 8 de liquide de refroidissement C est défini, d'une part, par la bordure périphérique 32 et, d'autre part, par une ou des bordures 60, 60', par exemple issues de matière du fond 31 de la plaque. Each plate 4, 12, 14 comprises, for example, a bottom 31, substantially plane, surrounded by a peripheral edge 32 terminated by a flat portion 34, for brazing the plates together. The coolant circuit 8 C is defined, on the one hand, by the peripheral edge 32 and, on the other hand, by one or more edges 60, 60 ', for example derived from material of the bottom 31 of the plate.
Les plaques 4, 12, 14 sont groupées par paires et assemblées par leurs méplats 34 et/ou les bordures 60, 60'. De la sorte, le circuit de la plaque supérieure et de la plaque inférieure d'une paire de plaques s'ajoutent pour constituer un canal de circulation du liquide de refroidissement C. Chaque paire de plaque définit ainsi une couche de circulation du premier fluide C. Les circuits 6 pour la circulation du fluide à refroidir sont prévus entre deux plaques 4 en vis-à-vis de deux paires de plaques 4 adjacentes. The plates 4, 12, 14 are grouped in pairs and assembled by their flats 34 and / or the edges 60, 60 '. In this way, the circuit of the upper plate and the lower plate of a pair of plates are added to form a coolant flow channel C. Each pair of plates thus defines a flow layer of the first fluid C The circuits 6 for the circulation of the fluid to be cooled are provided between two plates 4 vis-à-vis two pairs of adjacent plates 4.
Dans l'exemple illustré, les plaques supérieure 12 et inférieure 14 sont assemblées avec les parois supérieure 23 et inférieure 22 du boîtier pour définir un canal de circulation de liquide de refroidissement C. In the illustrated example, the top 12 and bottom 14 plates are assembled with the top 23 and bottom 22 walls of the housing to define a coolant flow channel C.
Les plaques 4 ont, par exemple, la forme générale d'un rectangle allongé ayant deux grands cotés et deux petits côtés, chaque plaque comportant deux poches embouties 38, une première des poches présentant une entrée 40 du circuit 8 de circulation de liquide de refroidissement C et l'autre des poches présentant une sortie 42 du circuit 8 de circulation du liquide de refroidissement C. The plates 4 have, for example, the general shape of an elongated rectangle having two long sides and two short sides, each plate having two stamped pockets 38, a first of the pockets having an inlet 40 of the circuit 8 and the other of the pockets having an outlet 42 of the circuit 8 for circulating coolant C.
Les poches 38 sont ici percées d'un orifice 50 de passage du liquide de refroidissement orienté perpendiculairement au fond 31 des plaques et sont destinés à venir en contact sur les poches 38 d'une plaque 4 adjacente pour former respectivement un collecteur d'entrée, non visible, et un collecteur de sortie 44, non visible, pour le fluide de refroidissement. Les poches 38 permettent ainsi au premier fluide de passer d'une couche à une autre, c'est-à-dire d'une paire de plaque à une autre. Le collecteur d'entrée débouche, par exemple, dans la tubulure d'entrée 28 par l'orifice d'entrée 24 du boîtier et/ou le collecteur de sortie débouche, par exemple, dans la tubulure de sortie 30 par l'orifice de sortie 26 du boîtier 5. The pockets 38 are here pierced with a passage 50 for passage of the coolant oriented perpendicular to the bottom 31 of the plates and are intended to come into contact with the pockets 38 of an adjacent plate 4 to form an inlet manifold, not visible, and an outlet manifold 44, not visible, for the cooling fluid. The pockets 38 thus allow the first fluid to pass from one layer to another, that is to say from one pair of plates to another. The inlet manifold opens, for example, into the inlet pipe 28 through the inlet orifice 24 of the housing and / or the outlet manifold opens, for example, into the outlet pipe 30 through the output 26 of the housing 5.
Ainsi, le fluide de refroidissement pénètre dans le faisceau 2 par la tubulure d'entrée 28 puis est réparti entre les plaques 4 dans les circuits 8 de circulation de liquide de refroidissement C par le collecteur d'entrée. Il s'écoule dans les circuits 8 de circulation de liquide de refroidissement C depuis leurs entrées 40 jusqu'au à leurs sorties 42 où il pénètre dans le collecteur de sortie 44. Il sort alors de l'échangeur 1 par la tubulure de sortie 30. Thus, the cooling fluid enters the beam 2 through the inlet pipe 28 and is distributed between the plates 4 in the circuits 8 for circulating coolant C by the inlet manifold. It flows into the coolant circulation circuits C from their inlets 40 to their outlets 42 where it enters the outlet manifold 44. It then exits the exchanger 1 through the outlet pipe 30 .
Les poches 38 sont situés le long d'un même petit côté des plaque 4, 12, 14 situé à gauche sur la figure 1 , c'est-à-dire à proximité du premier bord périphérique 16 des plaques 4, 12, 14. Les poches 38 de deux paires de plaques 4 déterminent entre elles la hauteur des circuits 6 de circulation pour le fluide à refroidir G. The pockets 38 are located along the same small side of the plates 4, 12, 14 located on the left in Figure 1, that is to say near the first peripheral edge 16 of the plates 4, 12, 14. The pockets 38 of two pairs of plates 4 determine between them the height of the circulation circuits 6 for the fluid to be cooled G.
L'échangeur 1 comprend alors une zone d'échange de chaleur facilitant l'échange de chaleur entre le liquide de refroidissement C et le fluide à refroidir G qui s'étend entre les poches 38 et le deuxième bord périphérique 16' des plaques 4. La zone où se situent les poches 38, c'est-à-dire la zone à proximité du premier bord périphérique des plaques, dite zone emboutie, est une zone susceptible de permettre au deuxième fluide de contourner la zone d'échange de chaleur. Une boîte collectrice d'entrée et une boîte collectrice de sortie (non représentées) pourront être adaptées à la périphérie du boîtier pour amener et évacuer le fluide à refroidir. L'échangeur pourra aussi comprendre des surfaces d'échanges secondaires, par exemple, des perturbateurs ondulés (référencé 55 sur la figure 5) rapportés entre les plaques 4 dans les circuits 6 de circulation du fluide à refroidir G. Ces perturbateurs permettent de perturber le flux du fluide à refroidir G de manière à améliorer l'échange thermique entre les deux fluides. The exchanger 1 then comprises a heat exchange zone facilitating the exchange of heat between the coolant C and the coolant G which extends between the pockets 38 and the second peripheral edge 16 'of the plates 4. The zone where the pockets 38 are located, that is to say the zone near the first peripheral edge of the plates, called the stamped zone, is an area likely to allow the second fluid to bypass the heat exchange zone. An inlet manifold and an outlet manifold (not shown) may be adapted to the periphery of the housing to bring and evacuate the fluid to be cooled. The exchanger may also include secondary exchange surfaces, for example, corrugated disruptors (referenced 55 in Figure 5) reported between the plates 4 in the circulation circuits 6 of the fluid to be cooled G. These disrupters can disrupt the flow of the fluid to be cooled G so as to improve the heat exchange between the two fluids.
Chaque plaque 4, 12, 14 comprend par exemple des corrugations 52 disposés dans les circuits 8 de circulation du liquide de refroidissement C. Ces corrugations 52 s'étendent entre les poches 38 constituant le collecteur d'entrée et le collecteur de sortie 44 du liquide de refroidissement C et le deuxième bord périphérique 16' des plaques 4, 12, 14. Les corrugations 52 sont, par exemple, issues de matière du fond 31 des plaques 4, 12, 14, notamment par emboutissage des plaques 4, 12, 14. Each plate 4, 12, 14 for example comprises corrugations 52 arranged in the circuits 8 for circulating coolant C. These corrugations 52 extend between the pockets 38 constituting the inlet manifold and the outlet manifold 44 of the liquid C and the second peripheral edge 16 'of the plates 4, 12, 14. The corrugations 52 are, for example, derived from the bottom material 31 of the plates 4, 12, 14, in particular by stamping the plates 4, 12, 14 .
Le circuit 8 de circulation du liquide de refroidissement défini par les plaques 4, 12, 14 permet de guider le liquide de refroidissement en un nombre n de passes successives, ici quatre, dans lequel le liquide circule entre l'entrée 40 et la sortie 42 dudit circuit. Deux passes adjacentes sont séparées, par exemple, par les bordures 60, 60' des plaques 4, 12, 14. The coolant circulation circuit 8 defined by the plates 4, 12, 14 makes it possible to guide the cooling liquid in a number n of successive passes, here four, in which the liquid flows between the inlet 40 and the outlet 42 of said circuit. Two adjacent passes are separated, for example, by the borders 60, 60 'of the plates 4, 12, 14.
Les passes sont disposées parallèlement les unes aux autres selon une direction d'extension, ici le grand côté des plaques 4, 12, 14. Elles pourront être prévues en série les unes à la suite des autres. The passes are arranged parallel to each other in a direction of extension, here the large side of the plates 4, 12, 14. They may be provided in series one after the other.
Les bordures 60, 60' sont ainsi orientées selon le grand côté des plaques 4 pour définir une circulation en serpentin du liquide de refroidissement C dans chacune des passes de chacun des circuits 8 de circulation du liquide de refroidissement C. Certaines 60 des bordures s'étendent depuis le premier bord périphérique 16 des plaques 4, 12, 14 vers le deuxième bord périphérique 16' des plaques 4, 12, 14 tout en laissant un passage pour que fluide puisse s'écouler de la passe se trouvant d'un côté de la bordure 60 à l'autre passe. Elles alternent avec des bordures 60' s'étendant depuis le deuxième bord périphérique 16' des plaques 4, 12, 14 vers le premier bord périphérique 16 des plaques 4, 12, 14 tout en laissant un passage pour que le fluide puisse s'écouler de la passe se trouvant d'un côté de la bordure 60' à l'autre. The edges 60, 60 'are thus oriented along the long side of the plates 4 to define a coil circulation of the coolant C in each of the passes of each of the circulation circuits 8 of the coolant flow C. Some 60 of the edges s' extend from the first peripheral edge 16 of the plates 4, 12, 14 to the second peripheral edge 16 'of the plates 4, 12, 14 while leaving a passage for fluid to flow from the pass from one side of the border 60 to the other pass. They alternate with edges 60 'extending from the second peripheral edge 16' of the plates 4, 12, 14 towards the first peripheral edge 16 of the plates 4, 12, 14 while leaving a passage for the fluid to flow. of the pass lying on one side of the border 60 'to the other.
La circulation du fluide à refroidir G dans les circuits 6 de circulation du fluide à refroidir s'effectue dans une direction globalement perpendiculaire à celle de l'écoulement du liquide de refroidissement C, c'est-à-dire de la face avant du faisceau 2 vers sa face arrière. The circulation of the fluid to be cooled G in the circulation circuits 6 of the fluid to be cooled is effected in a direction generally perpendicular to that of the flow of the cooling liquid C, that is to say of the front face of the beam 2 to its back side.
La zone de l'échangeur où se situent les poches 38, est susceptible d'être soumise à de fortes variations thermiques puisque la température du liquide de refroidissement y entrant ou en sortant peut varier considérablement et dans un temps réduit en fonction de l'utilisation souhaitée de l'échangeur de chaleur. Ces brusques variations thermiques sont susceptibles de créer des contraintes supérieures aux contraintes subies par le reste de l'échangeur. Cette zone emboutie de l'échangeur où se situe les poches 38 et subissant de fortes contraintes est également appelée zone de contraintes 70. La zone de contrainte 70 se situe donc à proximité du premier bord périphérique 16 des plaques 4, 12, 14, c'est-à-dire à une distance comprise entre 0 et 30 mm. The zone of the exchanger where the pockets 38 are located, is liable to be subjected to large thermal variations since the temperature of the coolant entering or leaving can vary considerably and in a reduced time depending on the use desired heat exchanger. These sudden thermal variations are likely to create stresses greater than the stresses experienced by the rest of the exchanger. This stamped zone of the exchanger where the pockets 38 are located and subjected to high stresses is also called the stress zone 70. The stress zone 70 is thus located near the first peripheral edge 16 of the plates 4, 12, 14, and that is to say at a distance of between 0 and 30 mm.
Selon l'invention l'échangeur comprend un renfort 71 en contact avec la zone de contraintes 70 et le boîtier 5. Le renfort 71 prend ici la forme d'une paroi qui s'étend dans un plan perpendiculaire aux plans dans lesquels s'étendent la paroi gauche 18 et la paroi supérieure 23 du boîtier 5. Le renfort 71 est, par exemple, au contact de toute la zone de contraintes 70. Il est au contact du boîtier 5, notamment, par l'intermédiaire de la paroi gauche 18 et de la paroi supérieure 23 et/ou de la paroi inférieure 22. Le renfort 71 est ici une pièce distincte du boîtier 5 mais il pourrait également être venu de matière avec le boîtier 5, par exemple, avec la paroi gauche 18, avec la paroi inférieure 22 et/ou avec la paroi supérieure 23. Le renfort 71 de l'invention est illustré de manière plus détaillée sur la figure 2. Le renfort 71 prend ici la forme d'une paroi en forme de L. En effet, une extrémité latérale gauche 61 du renfort 71 comprend une aile 72 s'étendant dans un plan parallèle au plan dans lequel s'étend la paroi gauche 18 du boîtier 5. De cette manière le contact entre le renfort 71 et la paroi gauche 18 du boîtier 5 est un contact plan sur plan ce qui facilite, notamment, le brasage entre le renfort 71 et le boîtier 5. According to the invention the exchanger comprises a reinforcement 71 in contact with the stress zone 70 and the housing 5. The reinforcement 71 here takes the form of a wall which extends in a plane perpendicular to the planes in which extend the left wall 18 and the upper wall 23 of the housing 5. The reinforcement 71 is, for example, in contact with the entire stress zone 70. It is in contact with the housing 5, in particular, through the left wall 18 and the upper wall 23 and / or the lower wall 22. The reinforcement 71 is here a separate piece of the housing 5 but it could also be integral with the housing 5, for example, with the left wall 18, with the lower wall 22 and / or with the upper wall 23. The reinforcement 71 of the invention is illustrated in more detail in FIG. 2. The reinforcement 71 here takes the form of an L-shaped wall. Indeed, a left-hand lateral end 61 of the reinforcement 71 comprises a wing 72 s extending in a plane parallel to the plane in which the left wall 18 of the casing 5 extends. In this way, the contact between the reinforcement 71 and the left wall 18 of the casing 5 is a plane-to-plane contact which facilitates, in particular, brazing between the reinforcement 71 and the housing 5.
Afin d'agrandir la surface de contact entre le renfort 71 et la paroi supérieure et/ou entre le renfort 71 et la paroi inférieure, il est également possible de prévoir au moins une aile au niveau d'une extrémité supérieure 62 et/ou inférieure du renfort 71 . In order to enlarge the contact surface between the reinforcement 71 and the upper wall and / or between the reinforcement 71 and the bottom wall, it is also possible to provide at least one wing at an upper end 62 and / or lower. reinforcement 71.
La figure 3 permet d'illustrer un autre aspect de l'invention selon lequel les plaques 4, 12, 14 comprennent des bords pliés 75 au niveau de la zone de contraintes 70. Les bords pliés 75 prennent naissances à proximité du premier bord périphérique 16 des plaques 4, 12, 14 au niveau d'une extrémité latérale 65 des plaques 4, 12, 14 située du coté de la face d'entrée du fluide à refroidir. Ils s'étendent parallèlement aux poches embouties 38 c'est-à-dire selon un plan perpendiculaire au plan dans lequel s'étend le fond des plaques 4, 12, 14, c'est-à-dire un plan parallèle au plan dans lequel s'étend le renfort. Les bords pliés 75 prennent naissances en particulier au niveau des méplats 34 des bordures périphériques des plaques 4, 12, 41 . De cette manière le contact entre le renfort et la zone de contraintes 70 se fait au moins par l'intermédiaire des bords pliés 75. Au moins une partie du contact entre le renfort et la zone de contact 70 est alors un contact plan sur plan. La paroi supérieure 23 du boîtier 5 comprend, par exemple, un premier logement 76 recevant l'extrémité supérieure du renfort. Ce premier logement 76 prend la forme d'une rainure partant d'une extrémité de la paroi supérieure 23 en contact avec la paroi gauche, dirigée vers le faisceau et s'étendant au dessus de la zone de contraintes 70. Ce premier logement 76 permet de pré positionner le renfort sur le boîtier 5 et de le maintenir dans une position correct pour effectuer l'opération de brasage. Un logement identique peut également être prévu sur la paroi gauche (dit deuxième logement), et/ou sur la paroi inférieure et remplissent la même fonction que le premier logement 76 à savoir de permettre de pré positionner le renfort sur le boîtier 5 et de le maintenir dans une position correct pour effectuer l'opération de brasage. FIG. 3 illustrates another aspect of the invention according to which the plates 4, 12, 14 comprise folded edges 75 at the level of the stress zone 70. The folded edges 75 take birth near the first peripheral edge 16 plates 4, 12, 14 at a lateral end 65 of the plates 4, 12, 14 located on the side of the inlet face of the fluid to be cooled. They extend parallel to the stamped pockets 38 that is to say in a plane perpendicular to the plane in which the bottom of the plates 4, 12, 14 extends, that is to say a plane parallel to the plane in which extends the reinforcement. The folded edges 75 take birth especially at the flats 34 peripheral edges of the plates 4, 12, 41. In this way the contact between the reinforcement and the stress zone 70 is at least via the folded edges 75. At least a portion of the contact between the reinforcement and the contact zone 70 is then a plane-to-plane contact. The upper wall 23 of the housing 5 comprises, for example, a first housing 76 receiving the upper end of the reinforcement. This first housing 76 takes the form of a groove extending from one end of the upper wall 23 in contact with the left wall, directed towards the bundle and extending above the stress zone 70. This first housing 76 allows pre position the reinforcement on the housing 5 and maintain it in a correct position to perform the brazing operation. An identical housing may also be provided on the left wall (said second housing), and / or on the bottom wall and perform the same function as the first housing 76, namely to allow prepositioning the reinforcement on the housing 5 and maintain it in a correct position to perform the brazing operation.
La figure 4 permet de représenter le renfort 71 dans un mode de réalisation où il comprend une excroissance 80 située au niveau de l'extrémité supérieure 62 du renfort 71 et faisant saille par rapport à l'extrémité latérale gauche 61 du renfort 71 en contact avec la paroi gauche 18 du boîtier 5. L'excroissance 80 épouse ici une partie supérieure 81 de la paroi gauche 18 du boîtier 5. Dans l'exemple représenté, l'excroissance 80 possède une portion courbée épousant la partie supérieure 81 de la paroi gauche 18 également courbée. Cette excroissance 80 permet, notamment, de limiter l'entrée du fluide à refroidir dans la zone de contournement, c'est-à-dire la zone de contraintes de l'échangeur. FIG. 4 shows the reinforcement 71 in an embodiment where it comprises an outgrowth 80 situated at the upper end 62 of the reinforcement 71 and protruding with respect to the left-hand lateral end 61 of the reinforcement 71 in contact with the left wall 18 of the housing 5. The protrusion 80 here marries an upper portion 81 of the left wall 18 of the housing 5. In the example shown, the protrusion 80 has a curved portion conforming to the upper portion 81 of the left wall 18 also curved. This protrusion 80 allows, in particular, to limit the entry of the fluid to be cooled in the bypass zone, that is to say the stress zone of the exchanger.
On observe sur la figure 5 un exemple de réalisation selon lequel le renfort 71 est continu d'un bord supérieur à un bord inférieur du renfort, c'est-à-dire de la paroi supérieure 23 à la paroi inférieure 22 du boîtier 5. Le renfort 71 est ainsi en contact avec toutes les plaques 4, 12, 14. Il permet alors de renforcer toute la zone de contraintes de l'échangeur 1 . On peut également remarquer sur cette figure que le renfort 71 laisse libre la circulation du fluide à refroidir sur l'ensemble de la zone d'échange de chaleur. Le renfort 71 est ainsi en contact au niveau de son extrémité latérale gauche avec la paroi gauche 18 du boîtier 5 et continue vers l'intérieur du faisceau 2, son extrémité latérale droite 63 s'arrêtant à la limite entre la zone de contournement et la zone d'échange de chaleur, sans dépasser dans la zone d'échange de chaleur c'est-à-dire à la limite entre la zone de contraintes et le reste de l'échangeur. FIG. 5 shows an exemplary embodiment in which the reinforcement 71 is continuous from an upper edge to a lower edge of the reinforcement, that is to say from the upper wall 23 to the bottom wall 22 of the housing 5. The reinforcement 71 is thus in contact with all the plates 4, 12, 14. It then makes it possible to reinforce the entire stress zone of the exchanger 1. It can also be noted in this figure that the reinforcement 71 leaves free circulation of the fluid to be cooled over the entire heat exchange zone. The reinforcement 71 is thus in contact at its left-hand lateral end with the left wall 18 of the housing 5 and continues inwardly of the bundle 2, its right-hand lateral end 63 stopping at the boundary between the bypass zone and the heat exchange zone, without exceeding in the heat exchange zone that is to say at the limit between the stress zone and the rest of the exchanger.
Le renfort 71 peut également comprendre, comme illustré aux figures 5 et 6, des agrafes 85. Ces agrafes 85 sont, par exemple, situées au niveau de l'extrémité latérale gauche 61 du renfort 71 (figure 5) de manière à s'agrafer sur la paroi gauche du boîtier 5. Elles sont, notamment, situées sur l'extrémité supérieure du renfort 71 (figure 6) de façon à s'agrafer sur la paroi supérieure 23 du boîtier 5. Les agrafes 85 viennent s'agrafer sur la paroi gauche 18, sur la paroi inférieure 22 et/ou sur la paroi supérieure 23 du boîtier 5 au niveau d'encoches 86 présentes sur le boîtier. Les agrafes 85 pénètrent ainsi dans les encoches 86 et possèdent une partie repliée 87 en contact avec une face de la paroi gauche 18 opposée à la face de la paroi gauche 18 avec laquelle le renfort 71 est en contact de manière à pincer la paroi gauche 18. The reinforcement 71 may also comprise, as illustrated in FIGS. 5 and 6, staples 85. These staples 85 are, for example, located at the left-hand lateral end 61 of the reinforcement 71 (FIG. 5) so as to staple. on the left wall of the housing 5. They are, in particular, located on the upper end of the reinforcement 71 (FIG. 6) so as to be stuck on the upper wall 23 of the housing 5. The staples 85 are stuck on the left wall 18, on the bottom wall 22 and / or on the upper wall 23 of the housing 5 at the notches 86 present on the housing. The staples 85 thus penetrate the notches 86 and have a folded portion 87 in contact with a face of the left wall 18 opposite the face of the left wall 18 with which the reinforcement 71 is in contact so as to pinch the left wall 18 .
Ces agrafes 85 ont pour rôle le maintient mécanique du renfort 71 sur le boîtier 5 afin, notamment, d'optimiser le processus de brasage entre ces deux éléments. These staples 85 serve to maintain the mechanical strength of the reinforcement 71 on the housing 5 in particular to optimize the soldering process between these two elements.

Claims

REVENDICATIONS
1 . Échangeur (1 ) de chaleur à plaques empilées, comprenant un boîtier (5) à l'intérieur duquel se trouve une pluralité de plaques empilées (4, 12, 14) destinée à permettre un échange de chaleur entre un premier et un deuxième fluide (C, G) circulant au contact desdites plaques (4, 12, 14), lesdites plaques (1 ) comprenant une zone destinée à subir des variations thermiques susceptibles de créer des contraintes mécaniques, dite zone de contraintes (70), caractérisé par le fait que ledit échangeur (1 ) comprend un renfort (71 ) en contact avec ladite zone de contraintes (70) et le boîtier (5). 1. Stacked plate heat exchanger (1), comprising a housing (5) inside which there is a plurality of stacked plates (4, 12, 14) for allowing heat exchange between a first and a second fluid ( C, G) flowing in contact with said plates (4, 12, 14), said plates (1) comprising a zone intended to undergo thermal variations liable to create mechanical stresses, said stress zone (70), characterized in that said exchanger (1) comprises a reinforcement (71) in contact with said stress zone (70) and the housing (5).
2. Echangeur (1 ) selon la revendication 1 , dans lequel les plaques (4, 12, 14) sont agencées par paire, chaque paire de plaque définissant une couche de circulation du premier fluide (C), chaque plaque (4, 12, 14) comprenant une zone, dite zone emboutie, munie de poches embouties (38) pour le passage du premier fluide (C) d'une couche à une autre couche, ladite zone de contraintes (70) correspondant à ladite zone emboutie. 2. Exchanger (1) according to claim 1, wherein the plates (4, 12, 14) are arranged in pairs, each pair of plates defining a flow layer of the first fluid (C), each plate (4, 12, 14) comprising a zone, called the stamped zone, provided with stamped pockets (38) for the passage of the first fluid (C) from one layer to another layer, said stress zone (70) corresponding to said stamped zone.
3. Echangeur (1 ) selon la revendication 1 ou 2, dans lequel ledit échangeur (1 ) comprend une zone d'échange de chaleur destinée à favoriser l'échange de chaleur entre le premier et le deuxième fluide (C, G), et une zone de contournement susceptible de permettre au deuxième fluide (G) de contourner la zone d'échange de chaleur, ladite zone de contournement correspondant à ladite zone de contraintes (70), ledit renfort laissant libre la circulation du deuxième fluide (G) sur l'ensemble de la zone d'échange. 3. Exchanger (1) according to claim 1 or 2, wherein said exchanger (1) comprises a heat exchange zone for promoting heat exchange between the first and the second fluid (C, G), and a bypass zone capable of allowing the second fluid (G) to bypass the heat exchange zone, said bypass zone corresponding to said stress zone (70), said reinforcement leaving free circulation of the second fluid (G) on the whole exchange area.
4. Echangeur (1 ) selon l'une quelconques des revendications précédentes, dans lequel les plaques comprennent, au niveau de la zone de contraintes (70), un bord plié (75) s'étendant selon un plan perpendiculaire à un plan dans lequel s'étendent les plaques (4, 12, 14) de sorte que le contact entre le renfort (71 ) et la zone de contraintes (70) se fait au moins par l'intermédiaire du bord plié (75). An exchanger (1) according to any one of the preceding claims, wherein the plates comprise, at the stress zone (70), a folded edge (75) extending in a plane perpendicular to a plane in which the plates (4, 12, 14) extend so that the contact between the reinforcement (71) and the stress zone (70) is at least via the folded edge (75).
5. Echangeur (1 ) selon l'une quelconque des revendications précédentes, dans lequel ledit boîtier (5) comprend deux parois latérales (18, 19) venant en vis-à- vis d'un bord périphérique des plaques, une paroi inférieure (22) et/ou une paroi supérieure (23), situées au sommet et à la base de la pluralité de plaques empilées (4, 12, 14). 5. Exchanger (1) according to any one of the preceding claims, wherein said housing (5) comprises two side walls (18, 19) coming opposite a peripheral edge of the plates, a lower wall ( 22) and / or an upper wall (23), located at the top and bottom of the plurality of stacked plates (4, 12, 14).
6. Echangeur (1 ) selon la revendication 5, dans lequel le renfort (71 ) est en contact avec l'une des parois latérales (18) du boîtier (5), située à proximité de la zone de contrainte. 6. Exchanger (1) according to claim 5, wherein the reinforcement (71) is in contact with one of the side walls (18) of the housing (5), located near the stress zone.
7. Echangeur (1 ) selon la revendication 5 ou 6, dans lequel le renfort (71 ) est au contact de la paroi supérieure (23) et/ou de la paroi inférieure (22). 7. Exchanger (1) according to claim 5 or 6, wherein the reinforcement (71) is in contact with the upper wall (23) and / or the bottom wall (22).
8. Echangeur (1 ) selon l'une quelconque des revendications 5 à 7, dans lequel la paroi supérieure (23) du boîtier (5) comprend un premier logement (76) recevant ledit renfort (71 ). 8. Exchanger (1) according to any one of claims 5 to 7, wherein the upper wall (23) of the housing (5) comprises a first housing (76) receiving said reinforcement (71).
9. Echangeur (1 ) selon l'une quelconques des revendications 5 à 8, dans lequel la paroi latérale (18) du boîtier (5) en contact avec ledit renfort (71 ) comprend un deuxième logement recevant ledit renfort (71 ). 9. Exchanger (1) according to any one of claims 5 to 8, wherein the side wall (18) of the housing (5) in contact with said reinforcement (71) comprises a second housing receiving said reinforcement (71).
10. Echangeur (1 ) selon l'une quelconque des revendications 5 à 9, dans lequel une extrémité supérieure (62) et/ou inférieure du renfort (71 ) comprend une première aile, s'étendant dans un plan parallèle au plan dans lequel s'étendent les parois supérieure et inférieure (22, 23) du boîtier (5) de sorte que le contact entre le renfort (71 ) et la paroi supérieure (23) et/ou entre le renfort (71 ) et la paroi inférieure (22) est plan sur plan. 10. Exchanger (1) according to any one of claims 5 to 9, wherein an upper end (62) and / or lower of the reinforcement (71) comprises a first flange, extending in a plane parallel to the plane in which extend the upper and lower walls (22, 23) of the housing (5) so that the contact between the reinforcement (71) and the upper wall (23) and / or between the reinforcement (71) and the lower wall ( 22) is plan on plan.
1 1 . Echangeur (1 ) selon l'une quelconque des revendications 5 à 10, dans lequel un sommet du renfort (71 ) comprend une excroissance (80) épousant une partie supérieure (81 ) de la paroi latérale du boîtier en contact avec ledit renfort (71 ). 1 1. An exchanger (1) according to any one of claims 5 to 10, wherein a vertex of the reinforcement (71) comprises an outgrowth (80) conforming to an upper portion (81) of the side wall of the housing in contact with said reinforcement (71). ).
12. Echangeur (1 ) selon l'une quelconque des revendications 5 à 1 1 , dans lequel une extrémité latérale (61 ) du renfort (71 ) comprend une deuxième aile (72), s'étendant dans un plan parallèle au plan dans lequel s'étend la paroi latérale (18) du boîtier (5) en contact avec ledit renfort (71 ), dite paroi gauche, de sorte que le contact entre le renfort (71 ) et la paroi gauche (18) du boîtier (5) est plan sur plan. 12. Exchanger (1) according to any one of claims 5 to 1 1, wherein a lateral end (61) of the reinforcement (71) comprises a second flange (72), extending in a plane parallel to the plane in which extends the side wall (18) of the housing (5) in contact with said reinforcement (71), said left wall, so that the contact between the reinforcement (71) and the left wall (18) of the housing (5) is plan on plan.
13. Echangeur (1 ) selon l'une quelconque des revendications précédentes, dans lequel le renfort (71 ) comprend au moins une agrafe (85) venant s'agrafer sur le boîtier (5). 13. Exchanger (1) according to any one of the preceding claims, wherein the reinforcement (71) comprises at least one staple (85) to be stuck on the housing (5).
14. Echangeur (1 ) selon l'une quelconque des revendications précédentes, dans lequel le renfort (71 ) est continu d'un bord supérieur à un bord inférieur dudit renfort (71 ) de sorte qu'il est en contact avec toutes lesdites plaques (4, 12, 14). 14. Exchanger (1) according to any one of the preceding claims, wherein the reinforcement (71) is continuous from an upper edge to a lower edge of said reinforcement (71) so that it is in contact with all said plates. (4, 12, 14).
15. Module d'admission d'air pour moteur de véhicule automobile comprenant un échangeur (1 ) selon l'une quelconque des revendications précédentes. 15. Air intake module for a motor vehicle engine comprising an exchanger (1) according to any one of the preceding claims.
EP12769093.1A 2011-10-04 2012-10-02 Heat exchanger with stacked plates Withdrawn EP2764313A1 (en)

Applications Claiming Priority (2)

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FR1158948A FR2980837B1 (en) 2011-10-04 2011-10-04 HEAT EXCHANGER WITH STACKED PLATES.
PCT/EP2012/069502 WO2013050394A1 (en) 2011-10-04 2012-10-02 Heat exchanger with stacked plates

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FR2980837B1 (en) 2015-06-26
CN103988041A (en) 2014-08-13

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