EP3532791B1 - Collector plate for a motor vehicle heat exchanger - Google Patents

Collector plate for a motor vehicle heat exchanger Download PDF

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Publication number
EP3532791B1
EP3532791B1 EP17801078.1A EP17801078A EP3532791B1 EP 3532791 B1 EP3532791 B1 EP 3532791B1 EP 17801078 A EP17801078 A EP 17801078A EP 3532791 B1 EP3532791 B1 EP 3532791B1
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EP
European Patent Office
Prior art keywords
collector plate
groove
tubes
cover
heat exchanger
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.)
Active
Application number
EP17801078.1A
Other languages
German (de)
French (fr)
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EP3532791A1 (en
Inventor
Rémi TOURNOIS
Yves SEYNAT
Christian Riondet
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
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Valeo Systemes Thermiques SAS
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Publication of EP3532791A1 publication Critical patent/EP3532791A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • F28F9/0226—Header boxes formed by sealing end plates into covers with resilient gaskets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
    • 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
    • F28D2021/0091—Radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
    • F28F9/0217—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions the partitions being separate elements attached to header boxes

Definitions

  • the present invention relates to a collector plate for a motor vehicle heat exchanger and a heat exchanger provided with such a collector plate.
  • a heat exchanger conventionally comprises a bundle of tubes, delimited by two end tubes.
  • heat exchange fins can be provided between the bundle tubes to improve heat exchange.
  • An end heat exchange fin can be placed on the external face of each of the end tubes. The end heat exchange fin(s) thus delimit the bundle of tubes.
  • a cheek is placed directly on each of the end heat exchange fins mentioned.
  • a heat exchanger also has two collector plates (or “collectors”) which are crossed by the ends of the tubes of the tube bundle.
  • the collector plates are each covered with a lid to form a water box.
  • a first water box allows the distribution of the fluid passing through the tubes from a fluid inlet formed by a first cover.
  • the second water box allows the collection of the fluid which has passed through the tubes, to lead it to a fluid outlet from the heat exchanger, formed by the second cover.
  • a heat exchanger can comprise two bundles of tubes, parallel and offset relative to each other in a direction normal to the two bundles of tubes, crossed successively by the fluid to be cooled or heated.
  • the fluid inlet and outlet can be arranged at the same end of the tube bundles and formed by the same cover, the water box located at the other end making it possible to guide the fluid from the exit of the tubes of the first bundle of tubes crossed towards the inlet of the tubes of the second bundle of tubes to be crossed.
  • the tubes of the two tube bundles are crossed by fluid at different temperatures. This results in different expansions of the tubes between the first bundle, traversed by a hotter fluid, and the second bundle, traversed by a colder fluid. These different expansions can cause cracks or other damage in the header plates to which the tubes are attached, which impairs the seal needed to guide the fluid effectively.
  • An aim of the invention is to provide a collector plate making it possible to reduce or even completely avoid the appearance of these cracks and/or damage.
  • the invention proposes a collector plate for a heat exchanger of a motor vehicle, comprising a first zone for receiving tubes from a first bundle of tubes of a heat exchanger, and a second zone for receiving tubes of a second tube bundle of a heat exchanger, the header plate having a groove, the groove extending between the first and second receiving zones, the header plate having a thinning at the groove.
  • the thinning of the plate at the level of the groove makes it possible to create a "deformation initiation", making it possible to soften the collector plate and facilitate the adaptation of the collector plate to the differential expansions of the tubes of the first and second beams.
  • this thinning located between the two parts mentioned above, facilitates the relative pivoting of these two parts, around this thinning.
  • the invention relates to a heat exchange device for a motor vehicle, in particular to an engine cooling radiator of a motor vehicle, with two methodical passes, comprising a first and a second bundle of tubes , a first collector plate and a second collector plate, at least a first cover, preferably a single first cover, fixed on the first collector plate and forming a water inlet and an outlet, a second cover fixed on the second collector plate and forming a guide for the water between the first bundle of tubes and the second bundle of tubes, the first collector plate being as described above, in all its combinations.
  • THE figures 1 and 2 illustrate an example of heat exchanger 10 (or heat exchanger).
  • heat exchanger 10 or heat exchanger
  • it is a heat exchanger with two methodical passes, cooling the gearbox and engine of a motor vehicle.
  • Such an exchanger can for example cool water, which passes through it, using an air flow F created by the speed of movement of the motor vehicle.
  • the heat exchanger 10 essentially comprises two bundles of tubes 12, (only one of which is visible on the figures 1 and 2 ) extending along two parallel planes, offset from each other in a direction normal to the planes.
  • the tube bundles are mounted between two collector plates 14, 16 receiving the ends of the tubes 12, and two side cheeks 18, 20.
  • the collector plates 14, 16 are of generally rectangular shape, in this case with rounded corners.
  • the collector plates 14, 16 can be made of metal, in particular aluminum.
  • a second cover 28 is fixed to the collector plate 16 located at the second end of the heat exchanger 10, opposite the first. This second cover 28 defines with the collector plate 16 a hollow space which places the first and second bundles of tubes 12 in fluid communication.
  • the first bundle of tubes 12 does not pass through a fluid that is generally hotter than the fluid passing through the second bundle of tubes 12.
  • the tubes of the first bundle of tubes therefore expand more significantly than the tubes of the second bundle of tubes .
  • These two bundles of tubes 12 being fixed to the two collector plates 14, 16, in particular by brazing, the different expansions of the tubes induce forces on the collector plates, in a direction substantially parallel to the direction of extension of the tubes, and therefore substantially normal to the planes of the collector plates 14, 16.
  • the collector plate 14 is here designed to limit the effects of these expansions, in particular to avoid the risk of cracks appearing or other more significant deterioration, which could harm the sealing of the plates. collectors 14, 16, making the heat exchange device 10 inoperative or, at the very least, less efficient.
  • the collector plate 14 comprises two zones 30, 32 for receiving the tubes of the first and second bundles 12 of tubes.
  • these zones are symmetrical with respect to a longitudinal median plane of the plate 14.
  • Each receiving zone 30, 32 is formed of substantially one half of the collecting plate 14.
  • Each receiving zone of the tubes 30, 32 comprises for example the same number of slots 34 for receiving the tubes of the bundles of tubes 12, the slots 34 being crossed by the end of the tubes so that they open respectively into the distribution space or into the collection space defined with the first cover 22.
  • the tubes can be brazed to the collector plate 14, in particular at the level of these slots 34.
  • the slots 34 are here made at the top of reliefs or bosses 36, with respect to the internal face 14a of the collector plate 14.
  • the tubes bosses can be oblong in shape, as shown in the Figure 3 , to make them more rigid and/or adapt them to the shape of the tubes whose ends they receive.
  • the main direction of the oblong shape of the bosses 36 then corresponds substantially to the width of the collector plate 14.
  • the two reception zones 30, 32 are separated by a groove 38 in the internal face 14a.
  • the groove 38 is intended to receive a seal, ensuring sealing between the distribution space and the collection space.
  • the groove 38 extends here along a straight line corresponding to a longitudinal direction of the collector plate 14. This shape of the groove 38 is particularly suitable for receiving a seal ensuring sealing between the collector plate 14 and the first cover 22, joint whose geometry is preferably simple to ensure its effectiveness.
  • the groove 38 is formed by a fold 40 of the collector plate 14. This embodiment is particularly advantageous, because the fold 40 can be produced during the same stamping step as that forming the slots 34 and/or the bosses 36.
  • Fold 40 here has a “U” section. This shape of the fold 40 ensures greater flexibility. More precisely, and as visible on the figure 5 , in particular, the fold 40 has two cheeks 42, 44 around a core 46, defining the bottom of the groove 38. The cheeks 42, 44 form an angle with the core comprised for example between 70° and 130°. The angle between the cheeks and the core can in particular be defined as being the maximum angle between the tangents to the face 14a of collector plate 14, at the level of the cheeks 42, 44, and a plane parallel to the plane of extension of the collector plate 14.
  • the collector plate 14 has a thinning at the level of the groove 38. More precisely, here, the thickness of the collector plate 14 has a minimum e min , at least locally, at the level of the groove 38. This thinning can be achieved substantially at an angle or angles of the “U” section of the ply 40, that is to say at the level of the corners 48 at the junction between the cheeks 42, 44 and the core 46 of the ply 40
  • the thickness e min of the plate 14 can be between 50% and 75% of the maximum thickness e max of the plate 14 at the level of fold 40. In particular, the thickness e min of plate 14 may be greater than 0.8 mm and/or less than 1.2 mm.
  • the maximum thickness e max of the plate 14 at the level of the fold 40 can be greater than 1 mm and/or less than 2 mm, in particular be substantially equal to 1.5 mm.
  • this maximum thickness e max is that of the plate 14 at the ends of the cheeks 42, 44 of the ply 40, which do not join the core 46.
  • the thickness e max can be equal to the thickness of the plate 14 at level of the reception zones 30, 32, in particular in the vicinity of the groove 38.
  • FIG. 6 illustrates a variant in which the collector plate 14 has, on its external face 14b, a deformation or a furrow 50 forming a more significant thinning.
  • the groove 50 is made at the level of the groove 38.
  • the groove 50 extends in particular parallel to the groove 38.
  • the groove 50 can, by itself, make it possible to create a thinning of the collector plate 14 at the level of the fold 40 Alternatively, however, this groove 50 is produced in addition to a thinning as described with regard to the figure 5 .
  • the groove 50 and/or any thinning of the plate 14 at the level of the groove 38 is made closer to the reception zone receiving the tubes of the first bundle of tubes, that is to say the tubes crossed by the hottest fluid, than the reception zone receiving the tubes of the second bundle of tubes, that is to say the tubes crossed by the coldest fluid.
  • the thinning and/or the furrow 50 are not made at the top of the fold 40, but are offset relative to this top, towards the zone of reception of the tubes crossed by the hottest fluid. This makes it easier to deform the collector plate 14 at the level of the groove 38, by rotation around the thinning.
  • THE figures 7 and 8 illustrate in more detail the mounting of the first cover 22 on the first collector plate 14.
  • a seal 52 is received in the groove 38.
  • the seal 52 has a "U" section in order to be received in the groove 38.
  • groove 38 and to receive a wall 54 of the first cover 22.
  • the wall 54 makes it possible to separate the distribution space, in fluid communication with the water inlet 24, on the one hand, and the first bundle of tubes, on the other hand, and the collection space, in fluid communication with the water outlet 26, on the one hand, and the second bundle of tubes, on the other hand.
  • the joint 54 is advantageously the central branch of an “8” joint 56.
  • the seal 56 can have a “U” section to receive the walls of the first cover 22 and thus ensure the sealing of these covers.
  • the part of the seal 56, not received in the groove 38, is received in a groove 58, made in the internal face 14a of the collector plate 14 and surrounding the first and second reception zones 30, 32.
  • a single first cover forms the water inlet and outlet of the heat exchange device.
  • the water inlet and outlet are formed by separate covers.

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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)

Description

La présente invention concerne une plaque collectrice pour échangeur de chaleur de véhicule automobile et un échangeur de chaleur muni d'une telle plaque collectrice.The present invention relates to a collector plate for a motor vehicle heat exchanger and a heat exchanger provided with such a collector plate.

Un échangeur de chaleur comporte classiquement un faisceau de tubes, délimité par deux tubes d'extrémités. En complément, des ailettes d'échange thermique peuvent être prévues entre les tubes du faisceau pour améliorer l'échange de chaleur. Une ailette d'échange thermique d'extrémité peut être disposée sur la face externe de chacun des tubes d'extrémité. La ou les ailettes d'échange thermique d'extrémité délimitent ainsi le faisceau de tubes. Une joue est disposée directement sur chacune des ailettes d'échange thermique d'extrémité mentionnées.A heat exchanger conventionally comprises a bundle of tubes, delimited by two end tubes. In addition, heat exchange fins can be provided between the bundle tubes to improve heat exchange. An end heat exchange fin can be placed on the external face of each of the end tubes. The end heat exchange fin(s) thus delimit the bundle of tubes. A cheek is placed directly on each of the end heat exchange fins mentioned.

Un échangeur de chaleur comporte encore deux plaques collectrices (ou « collecteurs ») qui sont traversées par les extrémités des tubes du faisceau de tubes. Les plaques collectrices sont chacune recouverte d'un couvercle pour former une boîte à eau. Dans le cas d'espèce, une première boîte à eau permet la distribution du fluide traversant les tubes depuis une entrée de fluide formée par un premier couvercle. La deuxième boîte à eau permet la collecte du fluide ayant traversé les tubes, pour le conduire à une sortie de fluide de l'échangeur de chaleur, formée par le deuxième couvercle.A heat exchanger also has two collector plates (or “collectors”) which are crossed by the ends of the tubes of the tube bundle. The collector plates are each covered with a lid to form a water box. In the present case, a first water box allows the distribution of the fluid passing through the tubes from a fluid inlet formed by a first cover. The second water box allows the collection of the fluid which has passed through the tubes, to lead it to a fluid outlet from the heat exchanger, formed by the second cover.

Dans le domaine automobile, notamment, un échangeur de chaleur peut comporter deux faisceaux de tubes, parallèles et décalés l'un par rapport à l'autre dans une direction normale aux deux faisceau de tubes, traversés successivement par le fluide à refroidir ou chauffer. Dans ce cas, l'entrée et la sortie de fluide peuvent être disposées au niveau d'une même extrémité des faisceaux de tubes et formées par un même couvercle, la boîte à eau située à l'autre extrémité permettant de guider le fluide depuis la sortie des tubes du premier faisceau de tubes traversés vers l'entrée des tubes du deuxième faisceau de tubes à traverser.In the automotive field, in particular, a heat exchanger can comprise two bundles of tubes, parallel and offset relative to each other in a direction normal to the two bundles of tubes, crossed successively by the fluid to be cooled or heated. In this case, the fluid inlet and outlet can be arranged at the same end of the tube bundles and formed by the same cover, the water box located at the other end making it possible to guide the fluid from the exit of the tubes of the first bundle of tubes crossed towards the inlet of the tubes of the second bundle of tubes to be crossed.

Dans ce cas de figure, les tubes des deux faisceaux de tubes sont traversés par du fluide à des températures différentes. Il s'en suit des dilations différentes des tubes entre le premier faisceau, parcouru par un fluide plus chaud, et le deuxième faisceau, parcouru par un fluide plus froid. Ces dilatations différentes peuvent provoquer des fissures ou d'autres dommages dans les plaques collectrices auxquelles les tubes sont fixés, qui nuisent à l'étanchéité nécessaire pour guider efficacement le fluide.In this scenario, the tubes of the two tube bundles are crossed by fluid at different temperatures. This results in different expansions of the tubes between the first bundle, traversed by a hotter fluid, and the second bundle, traversed by a colder fluid. These different expansions can cause cracks or other damage in the header plates to which the tubes are attached, which impairs the seal needed to guide the fluid effectively.

Ces effets des dilatations différentielles des tubes peuvent être accentués quand la plaque collectrice comporte une rainure de réception d'un joint d'étanchéité, qui rend la plaque collectrice plus rigide.These effects of differential tube expansions can be accentuated when the collector plate has a groove for receiving a seal, which makes the collector plate more rigid.

Ces dilatations différentes sont en outre particulièrement sensibles au niveau de la plaque collectrice de la boîte à eau d'entrée et de sortie, qui est en contact direct avec du liquide le plus chaud et du liquide le plus froid. Cette plaque collectrice peut alors présenter des dilatations différentielles aptes à provoquer également des dommages à la plaque collectrice nuisant à son étanchéité. Le document EP 0 767 354 A1 divulgue une plaque collectrice pour échangeur de chaleur de véhicule automobile selon le préambule de la revendication 1.These different expansions are also particularly sensitive at the level of the collector plate of the inlet and outlet water box, which is in direct contact with the hottest liquid and the coldest liquid. This collector plate can then exhibit differential expansions capable of also causing damage to the collector plate, harming its sealing. The document EP 0 767 354 A1 discloses a collector plate for a motor vehicle heat exchanger according to the preamble of claim 1.

Un but de l'invention est de fournir une plaque collectrice permettant de réduire, voire d'éviter totalement l'apparition de ces fissures et/ou dommages.An aim of the invention is to provide a collector plate making it possible to reduce or even completely avoid the appearance of these cracks and/or damage.

À cette fin, l'invention propose une plaque collectrice pour échangeur de chaleur de véhicule automobile, comportant une première zone de réception de tubes d'un premier faisceau de tubes d'un échangeur de chaleur, et une deuxième zone de réception de tubes d'un deuxième faisceau de tubes d'un échangeur de chaleur, la plaque collectrice ayant une rainure, la rainure s'étendant entre les première et deuxième zones de réception, la plaque collectrice présentant un amincissement au niveau de la rainure.To this end, the invention proposes a collector plate for a heat exchanger of a motor vehicle, comprising a first zone for receiving tubes from a first bundle of tubes of a heat exchanger, and a second zone for receiving tubes of a second tube bundle of a heat exchanger, the header plate having a groove, the groove extending between the first and second receiving zones, the header plate having a thinning at the groove.

Ainsi, l'amincissement de la plaque au niveau de la rainure, permet de créer une « amorce de déformation », permettant d'assouplir la plaque collectrice et de faciliter l'adaptation de la plaque collectrice aux dilatations différentielles des tubes des premier et deuxième faisceaux. Notamment, cet amincissement, situé entre les deux parties mentionnées ci-avant, facilite le pivotement relatif de ces deux parties, autour de cet amincissement.Thus, the thinning of the plate at the level of the groove makes it possible to create a "deformation initiation", making it possible to soften the collector plate and facilitate the adaptation of the collector plate to the differential expansions of the tubes of the first and second beams. In particular, this thinning, located between the two parts mentioned above, facilitates the relative pivoting of these two parts, around this thinning.

Selon des modes de réalisation préférés de l'invention, la plaque collectrice comporte une ou plusieurs des caractéristiques suivantes, prises seules ou en combinaison :

  • l'amincissement au niveau de la rainure correspond à une épaisseur minimale de la plaque collectrice au niveau de la rainure, supérieure à 50 % et/ou inférieure à 75 % d'une épaisseur maximale de la plaque collectrice au niveau de la rainure ;
  • la rainure est définie par un pli de la plaque collectrice ;
  • le pli a une section en « U » ;
  • l'amincissement de la plaque collectrice se situe au niveau d'un ou des angles de la section en « U » du pli ;
  • la plaque collectrice présente, sur une face de la plaque collectrice opposée à la face de la plaque collectrice avec la rainure, un sillon ou une déformation réduisant l'épaisseur de la plaque collectrice ;
  • la rainure est sur une face de la plaque collectrice destinée à être orientée vers un couvercle formant avec la plaque collectrice au moins une boîte à eau ;
  • la première et/ou la deuxième zone de réception de tubes comportent une pluralité de fentes, de préférence parallèles, chaque fente étant de préférence destinée à être traversée par l'extrémité d'un tube respectif ;
  • chaque fente est au sommet d'un bossage de la plaque collectrice, le bossage étant de préférence de forme oblongue, la longueur de la forme oblongue étant, de préférence encore, sensiblement perpendiculaire à la rainure, le bossage faisant de préférence saillie de la face de la plaque collectrice avec la rainure ;
  • la plaque collectrice forme une gorge autour des première et deuxième zones de réception, la rainure débouchant de part et d'autre dans la gorge.
According to preferred embodiments of the invention, the collector plate comprises one or more of the following characteristics, taken alone or in combination:
  • the thinning at the groove corresponds to a minimum thickness of the collector plate at the groove, greater than 50% and/or less than 75% of a maximum thickness of the collector plate at the groove;
  • the groove is defined by a fold of the collector plate;
  • the fold has a “U” section;
  • the thinning of the collector plate is located at one or more angles of the “U” section of the fold;
  • the collector plate has, on one face of the collector plate opposite the face of the collector plate with the groove, a groove or a deformation reducing the thickness of the collector plate;
  • the groove is on one face of the collector plate intended to be oriented towards a cover forming with the collector plate at least one water box;
  • the first and/or the second tube receiving zone comprise a plurality of slots, preferably parallel, each slot preferably being intended to be crossed by the end of a respective tube;
  • each slot is at the top of a boss of the collector plate, the boss preferably being of oblong shape, the length of the oblong shape being, more preferably, substantially perpendicular to the groove, the boss preferably projecting from the face of the collector plate with the groove;
  • the collector plate forms a groove around the first and second receiving zones, the groove opening on either side into the groove.

Selon un autre aspect, l'invention se rapporte à un dispositif d'échange de chaleur pour véhicule automobile, notamment à un radiateur de refroidissement du moteur d'un véhicule automobile, à deux passes méthodiques, comprenant un premier et un deuxième faisceau de tubes, une première plaque collectrice et une deuxième plaque collectrice, au moins un premier couvercle, de préférence un unique premier couvercle, fixé sur la première plaque collectrice et formant une entrée et une sortie d'eau, un deuxième couvercle fixé sur la deuxième plaque collectrice et formant guide pour l'eau entre le premier faisceau de tubes et le deuxième faisceau de tubes, la première plaque collectrice étant telle que décrite précédemment, dans toutes ses combinaisons.According to another aspect, the invention relates to a heat exchange device for a motor vehicle, in particular to an engine cooling radiator of a motor vehicle, with two methodical passes, comprising a first and a second bundle of tubes , a first collector plate and a second collector plate, at least a first cover, preferably a single first cover, fixed on the first collector plate and forming a water inlet and an outlet, a second cover fixed on the second collector plate and forming a guide for the water between the first bundle of tubes and the second bundle of tubes, the first collector plate being as described above, in all its combinations.

De préférence, l'échangeur de chaleur selon l'invention comporte une ou plusieurs des caractéristiques suivantes, prises seules ou en combinaison :

  • le dispositif d'échange de chaleur comprend également un premier joint d'étanchéité reçu dans la rainure de la première plaque collectrice, disposé entre la première plaque collectrice et une paroi du premier couvercle, pour séparer un espace de distribution mettant en communication de fluide l'entrée d'eau et le premier faisceau de tubes, d'un espace de collecte, mettant en communication de fluide la sortie d'eau et le deuxième faisceau de tubes, le joint d'étanchéité étant de préférence à section en « U » ;
  • la gorge recevant un second joint d'étanchéité unique pincé entre la première plaque collectrice et une paroi du premier couvercle, le joint d'étanchéité étant de préférence à section en « U » ; et
  • le second joint d'étanchéité a une forme en « 8 » avec une branche centrale, la branche centrale formant le premier joint d'étanchéité reçu dans la rainure de la première plaque collectrice.
Preferably, the heat exchanger according to the invention comprises one or more of the following characteristics, taken alone or in combination:
  • the heat exchange device also comprises a first seal received in the groove of the first collector plate, arranged between the first collector plate and a wall of the first cover, to separate a distribution space putting fluid into communication water inlet and the first bundle of tubes, a collection space, putting the water outlet and the second bundle of tubes into fluid communication, the seal preferably having a “U” section ;
  • the groove receiving a second single seal pinched between the first collector plate and a wall of the first cover, the seal preferably having a “U” section; And
  • the second seal has an “8” shape with a central branch, the central branch forming the first seal received in the groove of the first collector plate.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée à titre illustratif et non limitatif, en faisant référence aux dessins annexés dans lesquels :

  • les figures 1 et 2 représentent un échangeur de chaleur pour véhicule automobile, respectivement en perspective et en vue de face ;
  • les figures 3 et 4 illustre une plaque collectrice de l'échangeur de chaleur de la figure 1, respectivement en perspective et en coupe selon la ligne IV-IV ;
  • la figure 5 illustre un détail de la figure 4 ;
  • la figure 6 illustre une variante du détail de la figure 5 ; et
  • les figures 7 et 8 montrent en perspective arrachée et en vue éclatée, respectivement, un détail du montage de l'échangeur de chaleur de la figure 1.
The invention will be better understood on reading the description which follows, given by way of illustration and not limitation, with reference to the appended drawings in which:
  • THE figures 1 and 2 represent a heat exchanger for a motor vehicle, respectively in perspective and in front view;
  • THE figures 3 and 4 illustrates a collector plate of the heat exchanger of the figure 1 , respectively in perspective and in section along line IV-IV;
  • there figure 5 illustrates a detail of the figure 4 ;
  • there Figure 6 illustrates a variant of the detail of the figure 5 ; And
  • THE figures 7 and 8 show in torn perspective and in exploded view, respectively, a detail of the assembly of the heat exchanger of the figure 1 .

Dans la suite de la description, les éléments identiques ou de fonction identique portent le même signe de référence. À fin de concision de la description, seules les différences entre les modes de réalisation présentés sont décrites.In the remainder of the description, identical elements or elements with identical function bear the same reference sign. For the sake of conciseness of the description, only the differences between the embodiments presented are described.

Les figures 1 et 2 illustrent un exemple d'échangeur de chaleur 10 (ou échangeur thermique). En l'espèce, il s'agit d'un échangeur de chaleur à deux passes méthodiques, de refroidissement de la boîte de vitesse et du moteur d'un véhicule automobile. Un tel échangeur peut par exemple refroidir de l'eau, qui le traverse, à l'aide d'un flux d'air F créé par la vitesse de déplacement du véhicule automobile.THE figures 1 and 2 illustrate an example of heat exchanger 10 (or heat exchanger). In this case, it is a heat exchanger with two methodical passes, cooling the gearbox and engine of a motor vehicle. Such an exchanger can for example cool water, which passes through it, using an air flow F created by the speed of movement of the motor vehicle.

L'échangeur de chaleur 10 comporte essentiellement deux faisceaux de tubes 12, (dont un seul est visible sur les figures 1 et 2) s'étendant selon deux plans parallèles, décalés l'un par rapport à l'autre selon une direction normale aux plans. Les faisceaux de tubes sont montés entre deux plaques collectrices 14, 16 recevant les extrémités des tubes 12, et deux joues latérales 18, 20. Les plaques collectrices 14, 16 sont de forme générale rectangulaire, en l'espèce avec des coins arrondis. Les plaques collectrices 14, 16 peuvent être en métal, notamment en aluminium.The heat exchanger 10 essentially comprises two bundles of tubes 12, (only one of which is visible on the figures 1 and 2 ) extending along two parallel planes, offset from each other in a direction normal to the planes. The tube bundles are mounted between two collector plates 14, 16 receiving the ends of the tubes 12, and two side cheeks 18, 20. The collector plates 14, 16 are of generally rectangular shape, in this case with rounded corners. The collector plates 14, 16 can be made of metal, in particular aluminum.

Un premier couvercle 22 est fixé sur la plaque collectrice 14, située à une première extrémité longitudinale de l'échangeur de chaleur 10, l'ensemble ainsi formé étant parfois appelé boîte à eau. Le premier couvercle 22 forme une entrée 24 et une sortie d'eau 26 de l'échangeur de chaleur 10. Le premier couvercle 22 forme également, avec la plaque collectrice 14, deux espaces :

  • un premier espace dit de distribution, met en communication de fluide l'entrée d'eau 24 et un premier faisceau de tubes, en l'espèce, le faisceau de tube non visible sur la figure, destiné à être placé en aval par rapport à la direction de propagation du flux F d'air de refroidissement ;
  • un deuxième espace dit de collecte, met en communication de fluide la sortie d'eau 26 et le deuxième faisceau de tubes.
A first cover 22 is fixed on the collector plate 14, located at a first longitudinal end of the heat exchanger 10, the assembly thus formed being sometimes called a water box. The first cover 22 forms an inlet 24 and a water outlet 26 of the heat exchanger 10. The first cover 22 also forms, with the collector plate 14, two spaces:
  • a first so-called distribution space, puts the water inlet 24 in fluid communication with a first bundle of tubes, in this case, the bundle of tubes not visible in the figure, intended to be placed downstream in relation to the direction of propagation of the cooling air flow F;
  • a second so-called collection space puts the water outlet 26 and the second bundle of tubes in fluid communication.

Un deuxième couvercle 28 est fixé à la plaque collectrice 16 située à la deuxième extrémité de l'échangeur de chaleur 10, opposée à la première. Ce deuxième couvercle 28 définit avec la plaque collectrice 16 un espace creux qui met en communication de fluide les premier et deuxième faisceaux de tubes 12.A second cover 28 is fixed to the collector plate 16 located at the second end of the heat exchanger 10, opposite the first. This second cover 28 defines with the collector plate 16 a hollow space which places the first and second bundles of tubes 12 in fluid communication.

Le fonctionnement de cet échangeur de chaleur 10 peut être résumé comme suit :

  • l'eau, chaude, rentre dans le dispositif d'échange de chaleur 10 par l'entrée d'eau 24 :
  • l'eau chaude traverse l'espace de distribution formé par le premier couvercle 22 et la plaque collectrice 14, vers le premier faisceau de tubes 12, situé en aval par rapport au deuxième faisceau de tubes 12, dans le sens d'écoulement de l'air F, ce premier faisceau de tubes 12 étant ainsi en contact avec de l'air préalablement chauffé par le contact avec le deuxième faisceau de tubes 12 ;
  • à l'extrémité de l'échangeur de chaleur 10, opposée à l'entrée d'eau 24, l'eau fait demi-tour, guidée par le couvercle 28, qui dirige l'eau vers le deuxième faisceau de tubes 12 ;
  • l'eau traverse ensuite ce deuxième faisceau de tubes 12, jusque dans l'espace de collecte formé par le premier couvercle 22 et la plaque collectrice 14, qui dirige l'eau refroidie vers la sortie d'eau 26.
The operation of this heat exchanger 10 can be summarized as follows:
  • the hot water enters the heat exchange device 10 via the water inlet 24:
  • the hot water passes through the distribution space formed by the first cover 22 and the collector plate 14, towards the first bundle of tubes 12, located downstream with respect to the second bundle of tubes 12, in the direction of flow air F, this first bundle of tubes 12 thus being in contact with air previously heated by contact with the second bundle of tubes 12;
  • at the end of the heat exchanger 10, opposite the water inlet 24, the water turns around, guided by the cover 28, which directs the water towards the second bundle of tubes 12;
  • the water then passes through this second bundle of tubes 12, into the collection space formed by the first cover 22 and the collector plate 14, which directs the cooled water towards the water outlet 26.

Ainsi, le premier faisceau de tubes 12 est traversé pas du fluide globalement plus chaud que le fluide traversant le deuxième faisceau de tubes 12. Les tubes du premier faisceau de tubes se dilatent par conséquent de manière plus conséquente que les tubes du deuxième faisceau de tubes. Ces deux faisceaux de tubes 12 étant fixés aux deux plaques collectrices 14, 16, notamment par brasage, les dilatations différentes des tubes induisent des efforts sur les plaques collectrices, selon une direction sensiblement parallèle à la direction d'extension des tubes, et donc sensiblement normale aux plans des plaques collectrices 14, 16.Thus, the first bundle of tubes 12 does not pass through a fluid that is generally hotter than the fluid passing through the second bundle of tubes 12. The tubes of the first bundle of tubes therefore expand more significantly than the tubes of the second bundle of tubes . These two bundles of tubes 12 being fixed to the two collector plates 14, 16, in particular by brazing, the different expansions of the tubes induce forces on the collector plates, in a direction substantially parallel to the direction of extension of the tubes, and therefore substantially normal to the planes of the collector plates 14, 16.

Cependant, comme décrit ci-après, la plaque collectrice 14 est ici conçue pour limiter les effets de ces dilatations, notamment pour éviter les risques d'apparition de fissures ou d'autres détériorations plus conséquentes, qui pourraient nuire à l'étanchéité des plaques collectrices 14, 16, rendant le dispositif d'échange thermique 10 inopérant ou, à tout le moins, moins efficace.However, as described below, the collector plate 14 is here designed to limit the effects of these expansions, in particular to avoid the risk of cracks appearing or other more significant deterioration, which could harm the sealing of the plates. collectors 14, 16, making the heat exchange device 10 inoperative or, at the very least, less efficient.

Ainsi, comme illustrée à la figure 3, qui représente une face 14a de la plaque collectrice - ci-après face interne 14a - destinée à être orientée vers le premier couvercle 22, et opposée à la face 14b, référencée sur la figure 4 - ci-après face externe, la plaque collectrice 14 comprend deux zones 30, 32 de réception des tubes des premier et deuxième faisceaux 12 de tubes. Ici ces zones sont symétriques par rapport à un plan médian longitudinal de la plaque 14. Chaque zone de réception 30, 32 est formée de sensiblement une moitié de la plaque collectrice 14. Chaque zone de réception des tubes 30, 32 comporte par exemple un même nombre de fentes 34 de réception des tubes des faisceaux de tubes 12, les fentes 34 étant traversées par l'extrémité des tubes afin que ceux-ci débouchent respectivement dans l'espace de distribution ou dans l'espace de collecte définie avec le premier couvercle 22. Pour assurer l'étanchéité de ce montage, les tubes peuvent être brasés à la plaque collectrice 14, notamment au niveau de ces fentes 34. En outre, les fentes 34 sont ici réalisées au sommet de reliefs ou bossages 36, par rapport à la face interne 14a de la plaque collectrice 14. Les bossages peuvent être de forme oblongue, comme illustré sur la figure 3, pour les rendre plus rigides et/ou les adapter à la forme des tubes dont ils reçoivent les extrémités. De préférence, pour optimiser le nombre de fentes 34, la direction principale de la forme oblongue des bossages 36 correspond alors sensiblement à la largeur de la plaque collectrice 14.Thus, as illustrated in Figure 3 , which represents a face 14a of the collector plate - hereinafter internal face 14a - intended to be oriented towards the first cover 22, and opposite the face 14b, referenced on the figure 4 - hereinafter external face, the collector plate 14 comprises two zones 30, 32 for receiving the tubes of the first and second bundles 12 of tubes. Here these zones are symmetrical with respect to a longitudinal median plane of the plate 14. Each receiving zone 30, 32 is formed of substantially one half of the collecting plate 14. Each receiving zone of the tubes 30, 32 comprises for example the same number of slots 34 for receiving the tubes of the bundles of tubes 12, the slots 34 being crossed by the end of the tubes so that they open respectively into the distribution space or into the collection space defined with the first cover 22. To ensure the tightness of this assembly, the tubes can be brazed to the collector plate 14, in particular at the level of these slots 34. In addition, the slots 34 are here made at the top of reliefs or bosses 36, with respect to the internal face 14a of the collector plate 14. The tubes bosses can be oblong in shape, as shown in the Figure 3 , to make them more rigid and/or adapt them to the shape of the tubes whose ends they receive. Preferably, to optimize the number of slots 34, the main direction of the oblong shape of the bosses 36 then corresponds substantially to the width of the collector plate 14.

Les deux zones de réception 30, 32 sont séparées par une rainure 38 dans la face interne 14a. La rainure 38 est destinée à recevoir un joint d'étanchéité, assurant l'étanchéité entre l'espace de distribution et l'espace de collecte.The two reception zones 30, 32 are separated by a groove 38 in the internal face 14a. The groove 38 is intended to receive a seal, ensuring sealing between the distribution space and the collection space.

La rainure 38 s'étend ici selon une ligne droite correspondant à une direction longitudinale de la plaque collectrice 14. Cette forme de la rainure 38 est particulièrement adaptée pour recevoir un joint assurant l'étanchéité entre la plaque collectrice 14 et le premier couvercle 22, joint dont la géométrie est de préférence simple pour assurer son efficacité.The groove 38 extends here along a straight line corresponding to a longitudinal direction of the collector plate 14. This shape of the groove 38 is particularly suitable for receiving a seal ensuring sealing between the collector plate 14 and the first cover 22, joint whose geometry is preferably simple to ensure its effectiveness.

Ici, la rainure 38 est formée par un pli 40 de la plaque collectrice 14. Ce mode de réalisation est particulièrement avantageux, car le pli 40 peut être réalisé au cours de la même étape d'emboutissage que celle formant les fentes 34 et/ou les bossages 36.Here, the groove 38 is formed by a fold 40 of the collector plate 14. This embodiment is particularly advantageous, because the fold 40 can be produced during the same stamping step as that forming the slots 34 and/or the bosses 36.

Le pli 40 a ici une section en « U ». Cette forme du pli 40 lui assure une plus grande flexibilité. Plus précisément, et comme visible sur la figure 5, notamment, le pli 40 comporte deux joues 42, 44 autour d'une âme 46, définissant le fond de la rainure 38. Les joues 42, 44 forment avec l'âme un angle compris par exemple entre 70 ° et 130 °. L'angle entre les joues et l'âme peut notamment être défini comme étant l'angle maximal entre les tangentes à la face 14a de plaque collectrice 14, au niveau des joues 42, 44, et un plan parallèle au plan d'extension de la plaque collectrice 14.Fold 40 here has a “U” section. This shape of the fold 40 ensures greater flexibility. More precisely, and as visible on the figure 5 , in particular, the fold 40 has two cheeks 42, 44 around a core 46, defining the bottom of the groove 38. The cheeks 42, 44 form an angle with the core comprised for example between 70° and 130°. The angle between the cheeks and the core can in particular be defined as being the maximum angle between the tangents to the face 14a of collector plate 14, at the level of the cheeks 42, 44, and a plane parallel to the plane of extension of the collector plate 14.

Comme cela est plus particulièrement visible sur la figure 5, la plaque collectrice 14 présente un amincissement au niveau de la rainure 38. Plus précisément, ici, l'épaisseur de la plaque collectrice 14 présente un minimum emin, au moins local, au niveau de la rainure 38. Cet amincissement peut être réalisé sensiblement au niveau d'un angle ou des angles de la section en « U » du pli 40, c'est-à-dire au niveau des coins 48 à la jonction entre les joues 42, 44 et l'âme 46 du pli 40. L'épaisseur emin de la plaque 14 peut être comprise entre 50 % et 75 % de l'épaisseur maximale emax de la plaque 14 au niveau du pli 40. En particulier, l'épaisseur emin de la plaque 14 peut être supérieure à 0,8 mm et/ou inférieure à 1,2 mm. L'épaisseur maximale emax de la plaque 14 au niveau du pli 40 peut être supérieure à 1 mm et/ou inférieure à 2 mm, notamment être sensiblement égale à 1,5 mm. Ici, cette épaisseur maximale emax est celle de la plaque 14 aux extrémités des joues 42, 44 du pli 40, qui ne rejoignent pas l'âme 46. L'épaisseur emax peut être égale à l'épaisseur de la plaque 14 au niveau des zones de réception 30, 32, notamment au voisinage de la rainure 38.As is more particularly visible on the figure 5 , the collector plate 14 has a thinning at the level of the groove 38. More precisely, here, the thickness of the collector plate 14 has a minimum e min , at least locally, at the level of the groove 38. This thinning can be achieved substantially at an angle or angles of the “U” section of the ply 40, that is to say at the level of the corners 48 at the junction between the cheeks 42, 44 and the core 46 of the ply 40 The thickness e min of the plate 14 can be between 50% and 75% of the maximum thickness e max of the plate 14 at the level of fold 40. In particular, the thickness e min of plate 14 may be greater than 0.8 mm and/or less than 1.2 mm. The maximum thickness e max of the plate 14 at the level of the fold 40 can be greater than 1 mm and/or less than 2 mm, in particular be substantially equal to 1.5 mm. Here, this maximum thickness e max is that of the plate 14 at the ends of the cheeks 42, 44 of the ply 40, which do not join the core 46. The thickness e max can be equal to the thickness of the plate 14 at level of the reception zones 30, 32, in particular in the vicinity of the groove 38.

La figure 6 illustre une variante dans laquelle la plaque collectrice 14 présente, sur sa face externe 14b, une déformation ou un sillon 50 formant un amincissement plus important. Le sillon 50 est réalisé au niveau de la rainure 38. Le sillon 50 s'étend en particulier parallèlement à la rainure 38. Le sillon 50 peut, à lui seul, permettre de créer un amincissement de la plaque collectrice 14 au niveau du pli 40. Alternativement, cependant, ce sillon 50 est réalisé en sus d'un amincissement tel que décrit en regard de la figure 5. De manière particulièrement avantageuse, le sillon 50 et/ou tout amincissement de la plaque 14 au niveau de la rainure 38 est réalisé plus près de la zone de réception recevant les tubes du premier faisceau de tubes, c'est-à-dire les tubes traversés par le fluide le plus chaud, que de la zone de réception recevant les tubes du deuxième faisceau de tubes, c'est-à-dire les tubes traversés par le fluide le plus froid. Notamment, quand la rainure est réalisée sous la forme d'un pli 40, l'amincissement et/ou le sillon 50 ne sont pas réalisés au sommet du pli 40, mais sont décalés par rapport à ce sommet, en direction de la zone de réception des tubes traversés par le fluide le plus chaud. Ceci permet de faciliter la déformation de la plaque collectrice 14 au niveau de la rainure 38, par rotation autour de l'amincissement.There Figure 6 illustrates a variant in which the collector plate 14 has, on its external face 14b, a deformation or a furrow 50 forming a more significant thinning. The groove 50 is made at the level of the groove 38. The groove 50 extends in particular parallel to the groove 38. The groove 50 can, by itself, make it possible to create a thinning of the collector plate 14 at the level of the fold 40 Alternatively, however, this groove 50 is produced in addition to a thinning as described with regard to the figure 5 . Particularly advantageously, the groove 50 and/or any thinning of the plate 14 at the level of the groove 38 is made closer to the reception zone receiving the tubes of the first bundle of tubes, that is to say the tubes crossed by the hottest fluid, than the reception zone receiving the tubes of the second bundle of tubes, that is to say the tubes crossed by the coldest fluid. In particular, when the groove is made in the form of a fold 40, the thinning and/or the furrow 50 are not made at the top of the fold 40, but are offset relative to this top, towards the zone of reception of the tubes crossed by the hottest fluid. This makes it easier to deform the collector plate 14 at the level of the groove 38, by rotation around the thinning.

Les figures 7 et 8 illustrent plus en détails le montage du premier couvercle 22 sur la première plaque collectrice 14. Un joint d'étanchéité 52 est reçu dans la rainure 38. Le joint d'étanchéité 52 a une section en « U » afin d'être reçu dans la rainure 38 et de recevoir une paroi 54 du premier couvercle 22. La paroi 54 permet de séparer l'espace de distribution, en communication de fluide avec l'entrée d'eau 24, d'une part, et le premier faisceau de tubes, d'autre part, et l'espace de collecte, en communication de fluide avec la sortie d'eau 26, d'une part, et le deuxième faisceau de tubes, d'autre part.THE figures 7 and 8 illustrate in more detail the mounting of the first cover 22 on the first collector plate 14. A seal 52 is received in the groove 38. The seal 52 has a "U" section in order to be received in the groove 38. groove 38 and to receive a wall 54 of the first cover 22. The wall 54 makes it possible to separate the distribution space, in fluid communication with the water inlet 24, on the one hand, and the first bundle of tubes, on the other hand, and the collection space, in fluid communication with the water outlet 26, on the one hand, and the second bundle of tubes, on the other hand.

Comme cela est plus particulièrement visible sur la figure 8, le joint 54 est avantageusement la branche centrale d'un joint 56 en « 8 ». Le joint 56 peut être à section en « U » pour recevoir des parois du premier couvercle 22 et ainsi assurer l'étanchéité de ces couvercles. La partie du joint 56, non reçue dans la rainure 38, est reçue dans une gorge 58, réalisée dans la face interne 14a de la plaque collectrice 14 et entourant les première et deuxième zones de réception 30, 32.As is more particularly visible on the figure 8 , the joint 54 is advantageously the central branch of an “8” joint 56. The seal 56 can have a “U” section to receive the walls of the first cover 22 and thus ensure the sealing of these covers. The part of the seal 56, not received in the groove 38, is received in a groove 58, made in the internal face 14a of the collector plate 14 and surrounding the first and second reception zones 30, 32.

L'invention ne se limite pas aux seuls modes de réalisation décrits mais est susceptibles de nombreuses variantes accessibles à l'homme de l'art.The invention is not limited to the embodiments described alone but is capable of numerous variants accessible to those skilled in the art.

Notamment, dans le mode de réalisation décrit, un seul premier couvercle forme l'entrée et la sortie d'eau du dispositif d'échange de chaleur. En variante, cependant, l'entrée et la sortie d'eau sont formées par des couvercles distincts.In particular, in the embodiment described, a single first cover forms the water inlet and outlet of the heat exchange device. Alternatively, however, the water inlet and outlet are formed by separate covers.

Claims (14)

  1. Collector plate (14) for a motor vehicle heat exchanger (10), comprising a first receiving zone (30) for tubes of a first tube bundle of a heat exchanger (10), and a second receiving zone (32) for tubes of a second tube bundle of a heat exchanger, the collector plate (14) being of substantially rectangular shape, preferably with rounded corners, and having a groove (38), characterized in that the groove (38) extends in a longitudinal direction of the collector plate (14) between the first and second receiving zones (30; 32), the collector plate (14) being thinner in the region of the groove (38).
  2. Collector plate according to Claim 1, wherein the thinning in the region of the groove (38) corresponds to a minimum thickness (emin) of the collector plate (14) in the region of the groove (38), which is greater than 50% and/or less than 75% of a maximum thickness (emax) of the collector plate (14) in the region of the groove (38).
  3. Collector plate according to Claim 1 or 2, wherein the groove (38) is defined by a fold (40) of the collector plate (14).
  4. Collector plate according to Claim 3, wherein the fold (40) has a U-shaped cross section.
  5. Collector plate according to Claim 4, wherein the thinning of the collector plate (14) is located in the region of one or more angles of the U-shaped cross section of the fold (40).
  6. Collector plate according to any one of the preceding claims, wherein the collector plate (14) has a channel (50) or a deformation reducing the thickness of the collector plate (14) on one face (14b) of the collector plate (14), opposing the face (14a) of the collector plate (14) with the groove (38) .
  7. Collector plate according to any one of the preceding claims, wherein on a face (14a) of the collector plate (14) the groove (38) is designed to be oriented toward a cover (22) forming with the collector plate (14) at least one water chamber.
  8. Collector plate according to any one of the preceding claims, wherein the first and/or the second receiving zones for tubes (30; 32) comprise a plurality of slots (34) which are preferably parallel, each slot (34) being preferably designed to be traversed by the end of one respective tube.
  9. Collector plate according to Claim 8, wherein each slot (34) is at the top of a projection (36) of the collector plate (14), the projection (36) being preferably of oblong shape, the length of the oblong shape being further preferably substantially perpendicular to the groove (38), and the projection preferably protruding from the face (14a) of the collector plate (14) with the groove (38).
  10. Collector plate according to any one of the preceding claims, forming a recess (58) about the first and second receiving zones (30, 32), the groove (38) leading into the recess (58) on either side.
  11. Heat exchange device for a motor vehicle (10), in particular a radiator for cooling the engine of a motor vehicle, with two methodical passes, comprising a first and a second tube bundle (12), a first collector plate (14) according to one of Claims 1-10 and a second collector plate (16) according to one of Claims 1-10, at least one first cover (22), preferably a single first cover (22) fixed to the first collector plate (14) and forming a water inlet (24) and a water outlet (26), a second cover (28) fixed to the second collector plate (16) and forming a guide for the water between the first tube bundle and the second tube bundle (12), the first collector plate (14a) being according to any one of the preceding claims.
  12. Heat exchange device according to Claim 11, also comprising a first seal ring (52) which is received in the groove (38) of the first collector plate (14) arranged between the first collector plate (14) and a wall (54) of the first cover (22), in order to separate a distribution space, which places the water inlet (24) and the first tube bundle in fluidic communication, from a collection space, which places the water outlet (26) and the second tube bundle (12) in fluidic communication, the seal ring (52) being preferably of U-shaped cross section.
  13. Heat exchange device according to Claim 11 or 12, with Claim 10 being applicable, the recess (58) receiving a single second seal ring (56) clamped between the first collector plate (14) and a wall of the first cover (22), the seal ring (56) preferably being of U-shaped cross section.
  14. Heat exchange device according to Claims 12 and 13, wherein the second seal ring (56) has the shape of a figure eight with a central arm, the central arm forming the first seal ring (52) which is received in the groove (38) of the first collector plate (14) .
EP17801078.1A 2016-10-28 2017-10-27 Collector plate for a motor vehicle heat exchanger Active EP3532791B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1660539 2016-10-28
PCT/FR2017/052973 WO2018078300A1 (en) 2016-10-28 2017-10-27 Collector plate for a motor vehicle heat exchanger

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EP3532791A1 EP3532791A1 (en) 2019-09-04
EP3532791B1 true EP3532791B1 (en) 2024-03-13

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US (1) US11092390B2 (en)
EP (1) EP3532791B1 (en)
CN (1) CN109891180B (en)
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EP3489606A1 (en) * 2017-11-22 2019-05-29 Danfoss A/S Heat transfer plate for plate heat exchanger and plate heat exchanger with the same

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WO2018078300A1 (en) 2018-05-03
US11092390B2 (en) 2021-08-17
CN109891180B (en) 2021-07-09
EP3532791A1 (en) 2019-09-04
US20190277583A1 (en) 2019-09-12
CN109891180A (en) 2019-06-14
MX2019004922A (en) 2019-06-20

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