EP1063486A1 - Plate heat exchanger, especially oil cooler for motor vehicles - Google Patents

Plate heat exchanger, especially oil cooler for motor vehicles Download PDF

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Publication number
EP1063486A1
EP1063486A1 EP00401418A EP00401418A EP1063486A1 EP 1063486 A1 EP1063486 A1 EP 1063486A1 EP 00401418 A EP00401418 A EP 00401418A EP 00401418 A EP00401418 A EP 00401418A EP 1063486 A1 EP1063486 A1 EP 1063486A1
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EP
European Patent Office
Prior art keywords
plates
heat exchanger
fluid
undulations
exchanger according
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Granted
Application number
EP00401418A
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German (de)
French (fr)
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EP1063486B1 (en
Inventor
Ana Isabel Munoz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Thermique Moteur SA
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Valeo Thermique Moteur SA
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Publication of EP1063486A1 publication Critical patent/EP1063486A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • 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
    • F28D2021/0089—Oil coolers

Definitions

  • the invention relates to heat exchangers, in particular for motor vehicles.
  • It relates more particularly to a heat exchanger comprising a multiplicity of stacked plates provided each of a raised peripheral edge, and in which said peripheral edges are tightly assembled to delimit between the plates the first flow channels for a first fluid which alternate with second channels flow for a second fluid.
  • a heat exchanger of this type also called a “heat exchanger with plates “, or” blade exchanger ", is known in particular according to the publication DE-A-195 11 991.
  • Such a heat exchanger heat is used for example as a cooler automotive oil, for cooling engine oil or cooling the oil of the automatic gearbox, by exchange thermal with coolant, usually the one used to cool the vehicle engine.
  • the plates are usually made by stamping a metal sheet, and are stacked so that their peripheral edges respective fit into each other and be then brazed together to seal, which used to define fluid circulation channels.
  • the heat exchanger thus results from a stack of plates and does not require a housing.
  • An inlet manifold and a manifold are then provided. outlet for a first fluid which communicate with a first series of channels, as well as an inlet pipe and an outlet for a second fluid which communicate with a second set of channels, so that the channels of the first series alternate with the channels of the second series.
  • the plates have openings located to the right of the aforementioned tubing and alternatively sealed, or by stampings, either by added rings, to ensure or prohibit the passage of one or the other fluid.
  • the plates have a generally planar bottom and is provided in each flow channel, a disturbing element for favor a turbulent flow of the fluid and therefore the exchange thermal.
  • the object of the invention is in particular to overcome the drawbacks cited above.
  • the invention also aims to provide such a heat exchanger plate heat to improve heat exchange between the two fluids, without increasing the loss of load of the circuit of the first fluid and of the circuit of the second fluid.
  • the hydraulic diameter can be expressed by the aforementioned simplified relation.
  • the value of the hydraulic diameter D h is substantially equal to 1.8 mm.
  • the undulations of a first plate and the undulations of a second plate are preferably in mutual contact locally.
  • the undulations of the first plates and the undulations of the second plates are advantageously substantially shaped sinusoidal.
  • the first plates and the second plates are formed by stamping a metal sheet, preferably based on aluminum.
  • the raised edges of the first plates and the seconds plates are advantageously assembled together by brazing.
  • the exchanger heat is realized in the form of a cooler motor vehicle oil, in which one of the fluids is engine oil or transmission oil automatic vehicle speeds while the other fluid is a coolant.
  • the heat exchanger shown in Figure 1 includes a multiplicity of plates, or blades, stacked according to a assembly technique known as "in scales".
  • the heat exchanger heat includes first plates 10 which alternate with second plates 12 of different configuration.
  • the first plates 10 each have a bottom 14 surrounded by a peripheral edge 16 raised upwards.
  • the bottom 14 is provided with corrugations 18, of shape substantially sinusoidal, defined by parallel generatrices between which extend in a first direction D1 (figure 3).
  • the bottom 20 comprises corrugations 24 of substantially sinusoidal shape, defined by generators extending in a second direction D2 which is substantially perpendicular to the first direction D1 ( Figure 3).
  • the plates 10 and 12 are formed by stamping a sheet metallic preferably based on aluminum. They have in example a general rectangular shape but could present another shape provided that their edges are raised can fit two by two.
  • the heat exchanger further includes (Figure 1) a inlet tubing 26 and outlet tubing 28 for a first fluid F1, as well as an inlet pipe 30 and a outlet pipe 32 for a second fluid F2.
  • the plates 10 and 12 are stacked and thus come in mutual contact at their periphery by their raised edges respectively 16 and 22, which are brazed together to provide a waterproof mechanical connection.
  • the corrugations 18 of a first plate are in contact with the corrugations 24 of a second plate adjacent.
  • the plates 10 and 12 thus delimit between them channels 34 for the first fluid F1 which alternate with channels 36 for the second fluid F2.
  • Tubing 26, 28, 30 and 32 extend inside of the stack and means are provided for making communicate the pipes 26 and 28 with the first channels 34, on the one hand, and the pipes 30 and 32 with the second channels 36, on the other hand. These means of communication, in themselves known, are not described. Details on this can be found in particular in publication DE-A-195 11 991 cited above.
  • the respective undulations 18 and 24 make it possible to give the channels a special three-dimensional structure which promotes turbulent flow of fluid F1 and fluid F2 and, therefore, good heat exchange between them. This removes disruptive elements which, up to present, had been considered necessary in this type of plate heat exchangers.
  • the diameter hydraulic of channels 34 and 36 has a selected value.
  • h represents half of the maximum spacing between the respective peaks 38 and 40 respective corrugations 18, 24 of a first plate 10 and a second adjacent plate 12.
  • the value of the hydraulic diameter D h must be between 1 and 3 mm.
  • this value is substantially equal to 1.8 mm.
  • the heat exchanger advantageously constitutes a cooler oil. It can be used to cool the oil of the engine or the oil of the automatic gearbox of a motor vehicle. In this case, one of the fluids is made up of this oil, while the other fluid is consisting of a cooling fluid. This last one is advantageously the liquid which is usually used for motor vehicle engine cooling.
  • the heat exchanger When the heat exchanger is used to cool engine oil, it is then fixed either directly on the engine block, either on a connected filtration unit directly to the engine.
  • the exchanger can then be connected to the coolant circuit through conduits.
  • the heat exchanger can be connected directly to the oil pan of the gearbox speeds.

Abstract

Heat exchanger comprises first (10) and second (12) stacked plates placed alternately. Plates have bottoms (14,20) and undulations (18,24) extending in perpendicular directions so as to delimit between plates first (34) and second (36) flow channels for first and second fluids. Channel has hydraulic diameter (Dh) defined by Dh = 2 h where h represents half height of channel and value of hydraulic diameter is between 1 and 3 mm.

Description

L'invention se rapporte aux échangeurs de chaleur, notamment pour véhicules automobiles.The invention relates to heat exchangers, in particular for motor vehicles.

Elle concerne plus particulièrement un échangeur de chaleur comprenant une multiplicité de plaques empilées munies chacune d'un bord périphérique relevé, et dans lequel lesdits bords périphériques sont assemblés de manière étanche pour délimiter entre les plaques des premiers canaux d'écoulement pour un premier fluide qui alternent avec des seconds canaux d'écoulement pour un second fluide.It relates more particularly to a heat exchanger comprising a multiplicity of stacked plates provided each of a raised peripheral edge, and in which said peripheral edges are tightly assembled to delimit between the plates the first flow channels for a first fluid which alternate with second channels flow for a second fluid.

Un échangeur de chaleur de ce type, appelé aussi "échangeur à plaques", ou "échangeur à lames", est connu en particulier d'après la publication DE-A-195 11 991. Un tel échangeur de chaleur est utilisé par exemple en tant que refroidisseur d'huile pour véhicule automobile, pour assurer le refroidissement de l'huile du moteur ou encore le refroidissement de l'huile de la boíte de vitesses automatique, par échange thermique avec un fluide de refroidissement, habituellement celui qui sert au refroidissement du moteur du véhicule.A heat exchanger of this type, also called a "heat exchanger with plates ", or" blade exchanger ", is known in particular according to the publication DE-A-195 11 991. Such a heat exchanger heat is used for example as a cooler automotive oil, for cooling engine oil or cooling the oil of the automatic gearbox, by exchange thermal with coolant, usually the one used to cool the vehicle engine.

Dans un échangeur de chaleur de ce type, les plaques sont réalisées habituellement par emboutissage d'une tôle métallique, et sont empilées, en sorte que leurs bords périphériques respectifs s'emboítent les uns dans les autres et soient ensuite brasés entre eux pour assurer l'étanchéité, ce qui permet de définir des canaux de circulation de fluide. L'échangeur de chaleur résulte ainsi d'un empilage de plaques et ne nécessite pas de boítier.In a heat exchanger of this type, the plates are usually made by stamping a metal sheet, and are stacked so that their peripheral edges respective fit into each other and be then brazed together to seal, which used to define fluid circulation channels. The heat exchanger thus results from a stack of plates and does not require a housing.

On prévoit alors une tubulure d'entrée et une tubulure de sortie pour un premier fluide qui communiquent avec une première série de canaux, ainsi qu'une tubulure d'entrée et une tubulure de sortie pour un second fluide qui communiquent avec une deuxième série de canaux, en sorte que les canaux de la première série alternent avec les canaux de la deuxième série.An inlet manifold and a manifold are then provided. outlet for a first fluid which communicate with a first series of channels, as well as an inlet pipe and an outlet for a second fluid which communicate with a second set of channels, so that the channels of the first series alternate with the channels of the second series.

Les plaques possèdent des ouvertures situées au droit des tubulures précitées et alternativement rendues étanches, soit par des emboutis, soit par des bagues rapportées, pour assurer ou interdire le passage de l'un ou l'autre fluide.The plates have openings located to the right of the aforementioned tubing and alternatively sealed, or by stampings, either by added rings, to ensure or prohibit the passage of one or the other fluid.

Dans les échangeurs de chaleur connus de ce type, les plaques présentent un fond généralement plan et il est prévu, dans chaque canal d'écoulement, un élément perturbateur pour favoriser un écoulement turbulent du fluide et donc l'échange thermique.In known heat exchangers of this type, the plates have a generally planar bottom and is provided in each flow channel, a disturbing element for favor a turbulent flow of the fluid and therefore the exchange thermal.

En outre, il est généralement nécessaire de prévoir des éléments perturbateurs différents pour le premier et le second fluides, ce qui complique la fabrication de l'échangeur de chaleur.In addition, it is generally necessary to provide different disrupters for the first and the second fluids, which complicates the manufacture of the exchanger heat.

L'invention a notamment pour but de surmonter les inconvénients précités.The object of the invention is in particular to overcome the drawbacks cited above.

Elle vise en particulier à procurer un échangeur de chaleur à plaques du type défini précédemment, qui ne comporte pas d'éléments perturbateurs.It aims in particular to provide a heat exchanger with plates of the type defined above, which does not include disruptive elements.

L'invention vise également à procurer un tel échangeur de chaleur à plaques propre à améliorer l'échange thermique entre les deux fluides, sans augmentation de la perte de charge du circuit du premier fluide et du circuit du second fluide.The invention also aims to provide such a heat exchanger plate heat to improve heat exchange between the two fluids, without increasing the loss of load of the circuit of the first fluid and of the circuit of the second fluid.

L'invention propose à cet effet un échangeur de chaleur du type défini en introduction, lequel comprend des premières plaques présentant chacune un fond ondulé avec des ondulations définies par des génératrices s'étendant dans une première direction et des secondes plaques disposées en alternance avec les premières plaques et présentant chacune un fond ondulé avec des ondulations définies par des génératrices s'étendant dans une seconde direction qui est sensiblement perpendiculaire à la première direction, et dans lequel chaque canal possède un diamètre hydraulique (Dh) de valeur choisie, définie par la relation : Dh =2 x h, où h représente la demi-hauteur du canal, c'est-à-dire la moitié de l'espacement maximal entre les crêtes respectives des ondulations d'une première plaque et les crêtes respectives des ondulations d'une seconde plaque adjacente.The invention provides for this purpose a heat exchanger of the type defined in the introduction, which comprises first plates each having a corrugated bottom with corrugations defined by generators extending in a first direction and second plates arranged alternately with the first plates and each having a corrugated bottom with corrugations defined by generatrices extending in a second direction which is substantially perpendicular to the first direction, and in which each channel has a hydraulic diameter (D h ) of chosen value, defined by the relation: D h = 2 xh, where h represents the half-height of the channel, i.e. half the maximum spacing between the respective ridges of the undulations of a first plate and the respective ridges of the undulations a second adjacent plate.

On définit ainsi des canaux tridimensionnels de forme particulière délimités chacun entre deux fonds ondulés, dont les ondulations respectives s'étendent dans des directions sensiblement perpendiculaires entre elles.We thus define three-dimensional channels of shape each delimited between two wavy backgrounds, of which the respective undulations extend in directions substantially perpendicular to each other.

Ces ondulations donnent une valeur du diamètre hydraulique déterminée et égale pour les deux fluides.These undulations give a value for the hydraulic diameter determined and equal for the two fluids.

On rappellera que pour un tel canal tridimensionnel, le diamètre hydraulique est défini par la relation : Dh = 4 X Volume occupé par le fluide/Surface mouillée.It will be recalled that for such a three-dimensional channel, the hydraulic diameter is defined by the relation: D h = 4 X Volume occupied by the fluid / Wetted surface.

Dans le cas de l'invention, le diamètre hydraulique peut être exprimé par la relation simplifiée précitée.In the case of the invention, the hydraulic diameter can be expressed by the aforementioned simplified relation.

Il a été constaté que, lorsque la valeur du diamètre hydraulique Dh est choisie et est comprise entre 1 et 3 mm, on obtient un échange thermique optimal entre les deux fluides, sans augmentation de la perte de charge de l'un et l'autre de ces fluides.It has been observed that, when the value of the hydraulic diameter D h is chosen and is between 1 and 3 mm, an optimal heat exchange is obtained between the two fluids, without increasing the pressure drop between one and the other of these fluids.

De façon avantageuse, la valeur du diamètre hydraulique Dh est sensiblement égale à 1,8 mm.Advantageously, the value of the hydraulic diameter D h is substantially equal to 1.8 mm.

Dans l'invention, les ondulations d'une première plaque et les ondulations d'une seconde plaque sont de préférence en contact mutuel localement. In the invention, the undulations of a first plate and the undulations of a second plate are preferably in mutual contact locally.

Les ondulations des premières plaques et les ondulations des secondes plaques sont avantageusement de forme sensiblement sinusoïdale.The undulations of the first plates and the undulations of the second plates are advantageously substantially shaped sinusoidal.

Selon une autre caractéristique de l'invention, les premières plaques et les secondes plaques sont formées par emboutissage d'une tôle métallique, de préférence à base d'aluminium.According to another characteristic of the invention, the first plates and the second plates are formed by stamping a metal sheet, preferably based on aluminum.

Les bords relevés des premières plaques et des secondes plaques sont avantageusement assemblés entre eux par brasage.The raised edges of the first plates and the seconds plates are advantageously assembled together by brazing.

Dans une application préférentielle de l'invention, l'échangeur de chaleur est réalisé sous la forme d'un refroidisseur d'huile pour véhicule automobile, dans lequel l'un des fluides est l'huile du moteur ou l'huile de la boíte de vitesses automatique du véhicule, tandis que l'autre fluide est un fluide de refroidissement.In a preferred application of the invention, the exchanger heat is realized in the form of a cooler motor vehicle oil, in which one of the fluids is engine oil or transmission oil automatic vehicle speeds while the other fluid is a coolant.

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

  • la figure 1 est une vue en perspective d'un échangeur de chaleur à plaques selon l'invention ;
  • la figure 2 est une vue partielle en coupe de l'échangeur de chaleur de la figure 1 ; et
  • la figure 3 est une vue partielle en perspective éclatée d'une première plaque et d'une seconde plaque adjacentes faisant partie de l'échangeur de chaleur de la figure 1.
In the description which follows, given solely by way of example, reference is made to the appended drawings, in which:
  • Figure 1 is a perspective view of a plate heat exchanger according to the invention;
  • Figure 2 is a partial sectional view of the heat exchanger of Figure 1; and
  • FIG. 3 is a partial exploded perspective view of an adjacent first plate and a second plate forming part of the heat exchanger of FIG. 1.

L'échangeur de chaleur représenté à la figure 1 comprend une multiplicité de plaques, ou lames, empilées selon une technique d'assemblage dite "en écailles". L'échangeur de chaleur comprend des premières plaques 10 qui alternent avec des secondes plaques 12 de configuration différente.The heat exchanger shown in Figure 1 includes a multiplicity of plates, or blades, stacked according to a assembly technique known as "in scales". The heat exchanger heat includes first plates 10 which alternate with second plates 12 of different configuration.

Les premières plaques 10 présentent chacune un fond 14 entouré par un bord périphérique 16 relevé vers le haut. Le fond 14 est muni d'ondulations 18, de forme sensiblement sinusoïdale, définies par des génératrices parallèles entre elles qui s'étendent dans une première direction D1 (figure 3).The first plates 10 each have a bottom 14 surrounded by a peripheral edge 16 raised upwards. The bottom 14 is provided with corrugations 18, of shape substantially sinusoidal, defined by parallel generatrices between which extend in a first direction D1 (figure 3).

Les secondes plaques 12, disposées en alternance avec les premières plaques 10, présentent chacune un fond 20 entouré par un bord périphérique relevé 22, ayant une forme homologue de celle du bord périphérique 16 précité. Le fond 20 comporte des ondulations 24 de forme sensiblement sinusoïdale, définies par des génératrices s'étendant dans une seconde direction D2 qui est sensiblement perpendiculaire à la première direction D1 (figure 3).The second plates 12, arranged alternately with the first plates 10, each have a bottom 20 surrounded by a raised peripheral edge 22, having a homologous shape that of the aforementioned peripheral edge 16. The bottom 20 comprises corrugations 24 of substantially sinusoidal shape, defined by generators extending in a second direction D2 which is substantially perpendicular to the first direction D1 (Figure 3).

Les plaques 10 et 12 sont formées par emboutissage d'une tôle métallique de préférence à base d'aluminium. Elles ont dans l'exemple une forme générale rectangulaire mais pourraient présenter une autre forme à condition que leurs bords relevés puissent s'emboíter deux à deux.The plates 10 and 12 are formed by stamping a sheet metallic preferably based on aluminum. They have in example a general rectangular shape but could present another shape provided that their edges are raised can fit two by two.

L'échangeur de chaleur comprend en outre (figure 1) une tubulure d'entrée 26 et une tubulure de sortie 28 pour un premier fluide F1, ainsi qu'une tubulure d'entrée 30 et une tubulure de sortie 32 pour un second fluide F2.The heat exchanger further includes (Figure 1) a inlet tubing 26 and outlet tubing 28 for a first fluid F1, as well as an inlet pipe 30 and a outlet pipe 32 for a second fluid F2.

Les plaques 10 et 12 sont empilées et viennent ainsi en contact mutuel à leur périphérie par leurs bords relevés respectifs 16 et 22, qui sont brasés ensemble pour assurer un liaison mécanique étanche.The plates 10 and 12 are stacked and thus come in mutual contact at their periphery by their raised edges respectively 16 and 22, which are brazed together to provide a waterproof mechanical connection.

Par ailleurs, les ondulations 18 d'une première plaque sont en contact avec les ondulations 24 d'une seconde plaque adjacente. Les plaques 10 et 12 délimitent ainsi entre elles des canaux 34 pour le premier fluide F1 qui alternent avec des canaux 36 pour le second fluide F2.Furthermore, the corrugations 18 of a first plate are in contact with the corrugations 24 of a second plate adjacent. The plates 10 and 12 thus delimit between them channels 34 for the first fluid F1 which alternate with channels 36 for the second fluid F2.

Les tubulures 26, 28, 30 et 32 se prolongent à l'intérieur de la pile et il est prévu des moyens permettant de faire communiquer les tubulures 26 et 28 avec les premiers canaux 34, d'une part, et les tubulures 30 et 32 avec les seconds canaux 36, d'autre part. Ces moyens de communication, en eux-mêmes connus, ne sont pas décrits. Des détails à ce sujet peuvent être trouvés notamment dans la publication DE-A-195 11 991 précitée.Tubing 26, 28, 30 and 32 extend inside of the stack and means are provided for making communicate the pipes 26 and 28 with the first channels 34, on the one hand, and the pipes 30 and 32 with the second channels 36, on the other hand. These means of communication, in themselves known, are not described. Details on this can be found in particular in publication DE-A-195 11 991 cited above.

Les ondulations respectives 18 et 24 permettent de donner aux canaux une structure tridimensionnelle particulière qui favorise un écoulement turbulent du fluide F1 et du fluide F2 et, par conséquent, un bon échange thermique entre eux. Ceci permet de supprimer les éléments perturbateurs qui, jusqu'à présent, avaient été considérés comme nécessaires dans ce type d'échangeurs de chaleur à plaques.The respective undulations 18 and 24 make it possible to give the channels a special three-dimensional structure which promotes turbulent flow of fluid F1 and fluid F2 and, therefore, good heat exchange between them. This removes disruptive elements which, up to present, had been considered necessary in this type of plate heat exchangers.

Dans l'invention, il est en outre essentiel que le diamètre hydraulique des canaux 34 et 36 ait une valeur choisie.In the invention, it is also essential that the diameter hydraulic of channels 34 and 36 has a selected value.

En règle générale, le diamètre hydraulique est défini par la relation Dh = 4 x Volume occupé par le fluide/Surface mouillée.As a general rule, the hydraulic diameter is defined by the relationship D h = 4 x Volume occupied by the fluid / Wetted surface.

Ici, dans le cas d'un canal de faible épaisseur, le diamètre hydraulique Dh peut être exprimé, d'une façon simplifiée, par la relation suivante : Dh = 2 x h, où h représente la demi-hauteur du canal.Here, in the case of a thin channel, the hydraulic diameter D h can be expressed, in a simplified way, by the following relation: D h = 2 xh, where h represents the half height of the channel.

En se reportant aux figures 2 et 3, h représente la moitié de l'espacement maximal entre les crêtes respectives 38 et 40 des ondulations respectives 18, 24 d'une première plaque 10 et d'une deuxième plaque 12 adjacentes.Referring to Figures 2 and 3, h represents half of the maximum spacing between the respective peaks 38 and 40 respective corrugations 18, 24 of a first plate 10 and a second adjacent plate 12.

Ici, la valeur du diamètre hydraulique Dh doit être comprise entre 1 et 3 mm. Avantageusement, cette valeur est sensiblement égale à 1,8 mm.Here, the value of the hydraulic diameter D h must be between 1 and 3 mm. Advantageously, this value is substantially equal to 1.8 mm.

L'échangeur de chaleur constitue avantageusement un refroidisseur d'huile. Il peut être utilisé pour refroidir l'huile du moteur ou l'huile de la boíte de vitesses automatique d'un véhicule automobile. Dans ce cas, l'un des fluides est constitué par cette huile, tandis que l'autre fluide est constitué par un fluide de refroidissement. Ce dernier est avantageusement le liquide qui sert habituellement au refroidissement du moteur du véhicule automobile.The heat exchanger advantageously constitutes a cooler oil. It can be used to cool the oil of the engine or the oil of the automatic gearbox of a motor vehicle. In this case, one of the fluids is made up of this oil, while the other fluid is consisting of a cooling fluid. This last one is advantageously the liquid which is usually used for motor vehicle engine cooling.

Lorsque l'échangeur de chaleur est utilisé pour refroidir l'huile du moteur, il est alors fixé soit directement sur le bloc-moteur, soit sur un boítier de filtration connecté directement au moteur. L'échangeur peut être alors relié au circuit du fluide de refroidissement par des conduits.When the heat exchanger is used to cool engine oil, it is then fixed either directly on the engine block, either on a connected filtration unit directly to the engine. The exchanger can then be connected to the coolant circuit through conduits.

Dans le cas du refroidissement de l'huile de la boíte de vitesses automatique, l'échangeur de chaleur peut être raccordé directement au carter d'huile de la boíte de vitesses.In the case of cooling of the gearbox oil automatic gears, the heat exchanger can be connected directly to the oil pan of the gearbox speeds.

Il a été constaté qu'un tel échangeur de chaleur permet une amélioration de l'échange thermique entre les deux fluides, sans variation de la perte de charge du circuit d'huile et du circuit du liquide de refroidissement. Des essais ont montré que, par rapport à un échangeur de chaleur à plaques classique muni de perturbateurs, l'échangeur de chaleur selon l'invention dégage un puissance thermique qui peut être supérieure de 15% et une perte de charge qui peut être réduite de 30 à 40 %.It has been found that such a heat exchanger allows a improvement of the heat exchange between the two fluids, without variation in the pressure drop of the oil circuit and coolant circuit. Tests have shown that compared to a conventional plate heat exchanger fitted with disturbers, the heat exchanger according to the invention releases a thermal power which can be 15% higher and a pressure drop which can be reduced by 30 to 40%.

Bien entendu, l'invention n'est pas limitée à la forme de réalisation décrite précédemment à titre exemple mais s'étend également à d'autres variantes.Of course, the invention is not limited to the form of example described above but extends also to other variants.

Claims (7)

Echangeur de chaleur comprenant une multiplicité de plaques empilées (10 ; 12) munies chacune d'un bord périphérique relevé (16 ; 22) et dans lequel lesdits bords périphériques sont assemblés de manière étanche pour délimiter entre les plaques des premiers canaux d'écoulement (34) pour un premier fluide (F1) qui alternent avec des seconds canaux d'écoulement (36) pour un second fluide (F2),
caractérisé en ce qu'il comprend des premières plaques (10) présentant chacune un fond (14) ayant des ondulations (18) définies par des génératrices s'étendant dans une première direction (D1) et des secondes plaques (12) disposées en alternance avec les premières plaques (10) et présentant chacune un fond (20) ayant des ondulations (24) définies par des génératrices s'étendant dans une seconde direction (D2) qui est sensiblement perpendiculaire à la première direction (D1), et en ce que chaque canal (34 ; 36) possède un diamètre hydraulique (Dh) de valeur choisie, définie par la relation Dh = 2.h, où h représente la demi-hauteur du canal, c'est à dire la moitié de l'espacement maximal entre les crêtes respectives (38 ; 40) des ondulations respectives (18 ; 24) d'une première plaque (10) et d'une seconde plaque (12) adjacentes, et en ce que la valeur du diamètre hydraulique Dh est comprise entre 1 et 3 mm.Heat exchanger comprising a multiplicity of stacked plates (10; 12) each provided with a raised peripheral edge (16; 22) and in which said peripheral edges are assembled in leaktight manner to delimit between the plates the first flow channels ( 34) for a first fluid (F1) which alternate with second flow channels (36) for a second fluid (F2),
characterized in that it comprises first plates (10) each having a bottom (14) having undulations (18) defined by generators extending in a first direction (D1) and second plates (12) arranged alternately with the first plates (10) and each having a bottom (20) having undulations (24) defined by generatrices extending in a second direction (D2) which is substantially perpendicular to the first direction (D1), and in this that each channel (34; 36) has a hydraulic diameter (D h ) of chosen value, defined by the relation D h = 2.h, where h represents the half-height of the channel, that is to say half of l maximum spacing between the respective crests (38; 40) of the respective corrugations (18; 24) of a first plate (10) and a second plate (12) adjacent, and in that the value of the hydraulic diameter D h is between 1 and 3 mm. Echangeur de chaleur selon la revendication 1, caractérisé en ce que la valeur du diamètre hydraulique Dh est sensiblement égale à 1,8 mm.Heat exchanger according to claim 1, characterized in that the value of the hydraulic diameter D h is substantially equal to 1.8 mm. Echangeur de chaleur selon l'une des revendications 1 et 2, caractérisé en ce que les ondulations (18) d'une première plaque (10) et les ondulations (24) d'une seconde plaque (12) sont en contact mutuel localement. Heat exchanger according to one of claims 1 and 2, characterized in that the undulations (18) of a first plate (10) and the corrugations (24) of a second plate (12) are in mutual contact locally. Echangeur de chaleur selon l'une des revendications 1 à 3, caractérisé en ce que les ondulations (18) des premières plaques (10) et les ondulations (24) des secondes plaques (12) sont de forme sensiblement sinusoïdale.Heat exchanger according to one of claims 1 to 3, characterized in that the undulations (18) of the first plates (10) and the corrugations (24) of the second plates (12) are of substantially sinusoidal shape. Echangeur de chaleur selon l'une des revendications 1 à 4, caractérisé en ce que les premières plaques (10) et les secondes plaques (12) sont formées par emboutissage d'une tôle métallique, de préférence à base d'aluminium.Heat exchanger according to one of claims 1 to 4, characterized in that the first plates (10) and the second plates (12) are formed by stamping a metal sheet, preferably based on aluminum. Echangeur de chaleur selon l'une des revendications 1 à 5, caractérisé en ce que les bords relevés (16, 22) des premières plaques (10) et des secondes plaques (12) sont assemblés entre eux par brasage.Heat exchanger according to one of claims 1 to 5, characterized in that the raised edges (16, 22) of the first plates (10) and second plates (12) are joined together by brazing. Echangeur de chaleur selon l'une des revendications 1 à 6, caractérisé en ce que l'un des fluides est l'huile d'un moteur ou l'huile d'une boíte de vitesses automatique d'un véhicule automobile, tandis que l'autre fluide est un fluide de refroidissement.Heat exchanger according to one of claims 1 to 6, characterized in that one of the fluids is the oil of a engine or the oil in an automatic gearbox motor vehicle, while the other fluid is a fluid cooling.
EP20000401418 1999-06-21 2000-05-23 Plate heat exchanger, especially oil cooler for motor vehicles Expired - Lifetime EP1063486B1 (en)

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FR9907830 1999-06-21
FR9907830A FR2795165B1 (en) 1999-06-21 1999-06-21 PLATE HEAT EXCHANGER, PARTICULARLY OIL COOLER FOR MOTOR VEHICLE

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FR2846734A1 (en) 2002-10-31 2004-05-07 Valeo Thermique Moteur Sa Motor vehicle heat exchanger module has stacked plates defining fluid flow paths and with partition to separate heat exchange regions
FR2846733A1 (en) * 2002-10-31 2004-05-07 Valeo Thermique Moteur Sa Condenser for motor vehicle air conditioning has stacked plates defining flow passages for refrigerant and engine coolant
FR2846736A1 (en) 2002-10-31 2004-05-07 Valeo Thermique Moteur Sa Stacked plate heat exchanger for motor vehicle air conditioning has separating wall to define separate heat exchange sections which can be selectively communicated for multiple stage operation
FR2850740A1 (en) * 2003-01-31 2004-08-06 Valeo Thermique Moteur Sa Heat exchanger e.g. carbondioxide/carbondioxide internal exchanger, for motor vehicle, has passage ducts constituted by ring washers disposed between electric plates, where washers include tape ends superimposed to each other
WO2005088223A1 (en) * 2004-03-11 2005-09-22 Behr Gmbh & Co. Kg Stacked-plate heat exchanger
EP1711768A1 (en) * 2004-01-23 2006-10-18 Behr GmbH & Co. KG Heat exchanger, especially oil/coolant cooler
WO2007036963A1 (en) * 2005-09-30 2007-04-05 Gianni Candio Method for manufacturing a plate heat exchanger having plates connected through melted contact points and heat exchanger obtained using said method
EP2057424A2 (en) * 2006-09-01 2009-05-13 LG Electronics Inc. Water cooling type air conditioner
WO2010108907A1 (en) * 2009-03-24 2010-09-30 Valeo Systemes Thermiques Condenser with two heat exchange units for an air-conditioning circuit
US9273911B2 (en) 2008-12-29 2016-03-01 Alfa Laval Corporate Ab Plate, heat exchanger and method of manufacturing a heat exchanger

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WO2005012820A1 (en) * 2003-08-01 2005-02-10 Behr Gmbh & Co. Kg Heat exchanger and method for the production thereof
US7343965B2 (en) * 2004-01-20 2008-03-18 Modine Manufacturing Company Brazed plate high pressure heat exchanger
FR2954480B1 (en) 2009-12-17 2012-12-07 Valeo Systemes Thermiques HEAT EXCHANGER PLATE, IN PARTICULAR FOR AN AIR CONDITIONING CONDENSER
DE102011051935A1 (en) 2011-07-19 2013-01-24 Benteler Automobiltechnik Gmbh Method for manufacturing heat exchanger i.e. motor car heat exchanger, involves producing welding points by resistance welding of heat exchanger inner surface with turbulator insert, and coupling inner surface with insert by soldering
JP5727327B2 (en) * 2011-08-08 2015-06-03 株式会社神戸製鋼所 Heat exchanger
US9933214B2 (en) 2011-11-30 2018-04-03 Mitsubishi Electric Corporation Plate heat exchanger and refrigeration cycle apparatus including the same
KR101707046B1 (en) * 2014-12-30 2017-02-17 갑을오토텍(주) Oil cooler
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Cited By (15)

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US7469554B2 (en) 2002-10-31 2008-12-30 Valeo Systeme Thermiques Condenser, in particular for a motor vehicle air conditioning circuit, and circuit comprising same
FR2846733A1 (en) * 2002-10-31 2004-05-07 Valeo Thermique Moteur Sa Condenser for motor vehicle air conditioning has stacked plates defining flow passages for refrigerant and engine coolant
FR2846736A1 (en) 2002-10-31 2004-05-07 Valeo Thermique Moteur Sa Stacked plate heat exchanger for motor vehicle air conditioning has separating wall to define separate heat exchange sections which can be selectively communicated for multiple stage operation
WO2004042293A1 (en) * 2002-10-31 2004-05-21 Valeo Thermique Moteur Condenser, in particular for a motor vehicle air conditioning circuit, and circuit comprising same
US8122736B2 (en) 2002-10-31 2012-02-28 Valeo Systemes Thermiques Condenser for a motor vehicle air conditioning circuit, and circuit comprising same
FR2846734A1 (en) 2002-10-31 2004-05-07 Valeo Thermique Moteur Sa Motor vehicle heat exchanger module has stacked plates defining fluid flow paths and with partition to separate heat exchange regions
FR2850740A1 (en) * 2003-01-31 2004-08-06 Valeo Thermique Moteur Sa Heat exchanger e.g. carbondioxide/carbondioxide internal exchanger, for motor vehicle, has passage ducts constituted by ring washers disposed between electric plates, where washers include tape ends superimposed to each other
EP1711768A1 (en) * 2004-01-23 2006-10-18 Behr GmbH & Co. KG Heat exchanger, especially oil/coolant cooler
WO2005088223A1 (en) * 2004-03-11 2005-09-22 Behr Gmbh & Co. Kg Stacked-plate heat exchanger
WO2007036963A1 (en) * 2005-09-30 2007-04-05 Gianni Candio Method for manufacturing a plate heat exchanger having plates connected through melted contact points and heat exchanger obtained using said method
EP2057424A2 (en) * 2006-09-01 2009-05-13 LG Electronics Inc. Water cooling type air conditioner
EP2057424A4 (en) * 2006-09-01 2014-04-09 Lg Electronics Inc Water cooling type air conditioner
US9273911B2 (en) 2008-12-29 2016-03-01 Alfa Laval Corporate Ab Plate, heat exchanger and method of manufacturing a heat exchanger
WO2010108907A1 (en) * 2009-03-24 2010-09-30 Valeo Systemes Thermiques Condenser with two heat exchange units for an air-conditioning circuit
FR2943774A1 (en) * 2009-03-24 2010-10-01 Valeo Systemes Thermiques CONDENSER HAVING TWO HEAT EXCHANGE BLOCKS FOR AIR CONDITIONING CIRCUIT

Also Published As

Publication number Publication date
EP1063486B1 (en) 2005-11-16
FR2795165B1 (en) 2001-09-07
DE60023992D1 (en) 2005-12-22
FR2795165A1 (en) 2000-12-22
DE60023992T2 (en) 2006-07-27
JP2001056192A (en) 2001-02-27

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