EP1063488A1 - Plate heat exchanger, especially for cooling oil of motor vehicles - Google Patents
Plate heat exchanger, especially for cooling oil of motor vehicles Download PDFInfo
- Publication number
- EP1063488A1 EP1063488A1 EP00401420A EP00401420A EP1063488A1 EP 1063488 A1 EP1063488 A1 EP 1063488A1 EP 00401420 A EP00401420 A EP 00401420A EP 00401420 A EP00401420 A EP 00401420A EP 1063488 A1 EP1063488 A1 EP 1063488A1
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- European Patent Office
- Prior art keywords
- heat exchanger
- plates
- fluid
- exchanger according
- outlet
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Classifications
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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
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- 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
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, the exchanger comprising in addition to an inlet and an outlet for the first fluid as well than an inlet and an outlet for the 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.
- These plates have a generally flat bottom and it is provided, in each flow channel, a disturbing element to promote a turbulent flow of the fluid and therefore heat exchange.
- 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 invention provides for this purpose a heat exchanger of type defined in the introduction, in which the plates are identical to each other and have the general shape of a square, said plates each have a bottom having undulations defined by generators extending in a given direction, and these plates are arranged alternately being rotated 90 ° relative to the plate (s) adjacent (s), so that each channel is delimited by ripples crossed at 90 °, and in which the entry and the outlet of the first fluid lie substantially on a diagonal of the square, while the input and output of the second fluid are located substantially on another diagonal of the square.
- the heat exchanger is formed from plates of a single type which reduces the number of types of parts and facilitates assembly operations.
- fluid inlets and outlets are arranged on diagonals of the square, it is possible to superimpose one plate above another by rotating it 90 °.
- the undulations give a value for the hydraulic diameter determined and equal for the two fluids.
- the value of the hydraulic diameter D h is substantially equal to 1.8 mm.
- the undulations of two adjacent plates are preferably in mutual contact.
- the corrugations of the plates are advantageously shaped substantially sinusoidal.
- the plates are formed by stamping a metal sheet, preferably based on aluminum.
- the raised edges of the plates are advantageously assembled between them by soldering.
- 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 10, also called “half-blades”, stacked in a direction of assembly or stacking, according to an assembly technique called “scales”.
- the plates 10 are here identical to each other and have each a bottom 12 surrounded by a peripheral edge 14 which is generally flat and raised upwards.
- the bottom 12 a here the shape of a square with rounded angles and it is provided corrugations 16, of substantially sinusoidal shape, defined by generators parallel to each other and parallel to two opposite sides 18 of the square and therefore perpendicular to the two other opposite sides 20 of the square ( Figures 1 and 3).
- the plates 10 are formed by stamping a sheet metallic preferably aluminum-based, which is advantageously coated with solder plating on at least one of its faces.
- the plates 10 are stacked and thus come into mutual contact at their periphery by their respective raised edges 14, which are brazed together to ensure a tight mechanical connection.
- the plates 10 are arranged alternately, being at each times each turned 90 ° relative to the plate (s) adjacent (s), so that the respective corrugations 16 of two adjacent plates are crossed at 90 ° (figure 2). Through elsewhere, the corrugations of two adjacent plates 10 are in contact with each other.
- the plates 10 thus define between them channels 22 for a first fluid F1 which alternate with channels 24 for a second fluid F2.
- the heat exchanger further includes (Figure 1) a inlet tubing 26 and outlet tubing 28 for the first fluid F1, as well as an inlet pipe 30 and a outlet pipe 32 for the second fluid F2.
- Tubing 26 and 28 are on a diagonal of the square formed by the plate 10 located at one end of the stack and the pipes 30 and 32 are on another diagonal of this square (figure 3).
- Tubing 26, 28, 30 and 32 are mounted respectively on four circular openings 34, 36, 38 and 40 from the top plate of the stack ( Figure 3). These openings all have the same diameter and are located at equal distance from the center of the square. So when the plates 10 are stacked, they can communicate with each other by four series of aligned openings.
- 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 22, on the one hand, and the pipes 30 and 32 with the second channels 24, 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 corrugations 16 of the plates 10 allow give channels 22 and 24 a three-dimensional structure which promotes turbulent fluid flow F1 and F2 fluid and therefore a good exchange thermal between them. This removes the items disruptive which, until now, had been considered as needed in this type of heat exchangers at plates.
- the diameter hydraulic channel 22 and 24 has a selected value.
- h represents half of the maximum spacing between the respective peaks 40 and 42 respective corrugations 16 of two adjacent plates 10.
- 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.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
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, l'échangeur comprenant en outre une entrée et une sortie pour le premier fluide ainsi qu'une entrée et une sortie pour le 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, the exchanger comprising in addition to an inlet and an outlet for the first fluid as well than an inlet and an outlet for the 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, on prévoit habituellement des plaques de deux types différents qui sont disposées en alternance, ce qui augmente notamment les coûts en matière et en outillage.In known heat exchangers of this type, provision is made usually plates of two different types which are arranged alternately, which in particular increases costs in material and tools.
Ces 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.These plates have a generally flat bottom and it is provided, in each flow channel, a disturbing element to promote a turbulent flow of the fluid and therefore heat exchange.
De plus, il est généralement nécessaire de prévoir des éléments perturbateurs différents pour le premier fluide et le second fluide, ce qui complique encore la fabrication de l'échangeur de chaleur.In addition, it is generally necessary to provide different disruptive elements for the first fluid and the second fluid, which further complicates the manufacture of the heat exchanger.
Ainsi, tous ces échangeurs de chaleur connus nécessitent un grand nombre de pièces de types différents à assembler.Thus, all of these known heat exchangers require a large number of parts of different types to assemble.
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 principalement à procurer un échangeur de chaleur à plaques du type défini précédemment, qui comporte un nombre minimal de pièces de types différents, et en particulier qui est dépourvu d'éléments perturbateurs.Its main purpose is to provide a heat exchanger with plates of the type defined above, which has a number minimum of parts of different types, and in particular which is devoid of disturbing 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, dans lequel les plaques sont identiques entre elles et ont la forme générale d'un carré, lesdites plaques présentent chacune un fond ayant des ondulations définies par des génératrices s'étendant dans une direction donnée, et ces plaques sont disposées en alternance en étant tournées de 90° par rapport à la (aux) plaque(s) adjacente(s), de sorte que chaque canal est délimité par des ondulations croisées à 90°, et dans lequel l'entrée et la sortie du premier fluide se situent sensiblement sur une diagonale du carré, tandis que l'entrée et la sortie du second fluide se situent sensiblement sur une autre diagonale du carré.The invention provides for this purpose a heat exchanger of type defined in the introduction, in which the plates are identical to each other and have the general shape of a square, said plates each have a bottom having undulations defined by generators extending in a given direction, and these plates are arranged alternately being rotated 90 ° relative to the plate (s) adjacent (s), so that each channel is delimited by ripples crossed at 90 °, and in which the entry and the outlet of the first fluid lie substantially on a diagonal of the square, while the input and output of the second fluid are located substantially on another diagonal of the square.
Ainsi, l'échangeur de chaleur est formé à partir de plaques d'un seul type ce qui réduit le nombre de types de pièces et facilite les opérations d'assemblage.So the heat exchanger is formed from plates of a single type which reduces the number of types of parts and facilitates assembly operations.
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.
De plus, comme les entrées et sorties de fluide sont disposées sur des diagonales du carré, il est possible de superposer une plaque au dessus d'une autre en la faisant tourner de 90°.In addition, as the fluid inlets and outlets are arranged on diagonals of the square, it is possible to superimpose one plate above another by rotating it 90 °.
Les ondulations donnent une valeur du diamètre hydraulique déterminée et égale pour les deux fluides.The 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.
Selon l'invention, chaque canal possède un diamètre hydraulique
(Dh) de valeur choisie, définie par la relation Dh = 2.h,
où h représente la 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.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.
According to the invention, each channel has a hydraulic diameter (D h ) of chosen value, defined by the relation D h = 2.h, where h represents the height of the channel, that is to say half of the maximum spacing between the respective ridges of the corrugations of a first plate and the respective ridges of the corrugations of a second adjacent plate.
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 de deux plaques adjacentes sont de préférence en contact mutuel.In the invention, the undulations of two adjacent plates are preferably in mutual contact.
Les ondulations des plaques sont avantageusement de forme sensiblement sinusoïdale.The corrugations of the plates are advantageously shaped substantially sinusoidal.
Selon une autre caractéristique de l'invention, les plaques sont formées par emboutissage d'une tôle métallique, de préférence à base d'aluminium.According to another characteristic of the invention, the plates are formed by stamping a metal sheet, preferably based on aluminum.
Les bords relevés des plaques sont avantageusement assemblés entre eux par brasage.The raised edges of the plates are advantageously assembled between them by soldering.
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 de dessus de l'échangeur de chaleur de la figure 1.
- 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
- Figure 3 is a top view of the heat exchanger of Figure 1.
L'échangeur de chaleur représenté à la figure 1 comprend une
multiplicité de plaques 10, encore appelées "demi-lames",
empilées suivant une direction d'assemblage ou empilage,
selon une technique d'assemblage dite "en écailles".The heat exchanger shown in Figure 1 includes a
multiplicity of
Les plaques 10 sont ici identiques entre elles et présentent
chacune un fond 12 entouré par un bord périphérique 14 qui
est généralement plan et relevé vers le haut. Le fond 12 a
ici la forme d'un carré aux angles arrondis et il est muni
d'ondulations 16, de forme sensiblement sinusoïdale, définies
par des génératrices parallèles entre elles et parallèles à
deux côtés opposés 18 du carré et donc perpendiculaires aux
deux autres côtés opposés 20 du carré (figures 1 et 3).The
Les plaques 10 sont formées par emboutissage d'une tôle
métallique de préférence à base d'aluminium, qui est avantageusement
revêtue d'un placage de brasure sur l'une au moins
de ses faces.The
Pour former l'échangeur, les plaques 10 sont empilées et
viennent ainsi en contact mutuel à leur périphérie par leurs
bords relevés respectifs 14, qui sont brasés ensemble pour
assurer une liaison mécanique étanche.To form the exchanger, the
Les plaques 10 sont disposées en alternance en étant à chaque
fois tournées chacune de 90° par rapport à la (aux) plaque(s)
adjacente(s), si bien que les ondulations respectives 16 de
deux plaques adjacentes sont croisées à 90° (figure 2). Par
ailleurs, les ondulations de deux plaques 10 adjacentes sont
en contact entre elles. The
Les plaques 10 délimitent ainsi entre elles des canaux 22
pour un premier fluide F1 qui alternent avec des canaux 24
pour un second fluide F2.The
L'échangeur de chaleur comprend en outre (figure 1) une
tubulure d'entrée 26 et une tubulure de sortie 28 pour le
premier fluide F1, ainsi qu'une tubulure d'entrée 30 et une
tubulure de sortie 32 pour le second fluide F2.The heat exchanger further includes (Figure 1) a
Les tubulures 26 et 28 sont sur une diagonale du carré formé
par la plaque 10 située à une extrémité de la pile et les
tubulures 30 et 32 sont sur une autre diagonale de ce carré
(figure 3). Les tubulures 26, 28, 30 et 32 sont montées
respectivement sur quatre ouvertures circulaires 34, 36, 38
et 40 de la plaque supérieure de la pile (figure 3). Ces
ouvertures ont toutes le même diamètre et sont situées à
égale distance du centre du carré. Ainsi lorsque les plaques
10 sont empilées, elles peuvent communiquer entre elles par
quatre série d'ouvertures alignées.
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
22, d'une part, et les tubulures 30 et 32 avec les seconds
canaux 24, 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
Les ondulations respectives 16 des plaques 10 permettent de
donner aux canaux 22 et 24 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
L'écoulement des fluides F1 et F2 dans les canaux s'effectue à 90° par rapport aux ondulations, comme montré par la flèche E pour le fluide f2 (figure 3).The flow of fluids F1 and F2 in the channels takes place 90 ° to the ripples, as shown by the arrow E for fluid f2 (Figure 3).
Dans l'invention, il est en outre essentiel que le diamètre
hydraulique des canaux 22 et 24 ait une valeur choisie.In the invention, it is also essential that the diameter
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 :
En se reportant à la figure 2, h représente la moitié de
l'espacement maximal entre les crêtes respectives 40 et 42
des ondulations respectives 16 de deux plaques 10 adjacentes.Referring to Figure 2, h represents half of
the maximum spacing between the
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 alors être 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 augmentation 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 increasing the pressure drop in the oil circuit and of the coolant circuit. Tests have shown that compared to a plate heat exchanger conventional 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 (9)
caractérisé en ce que les plaques (10) sont identiques entre elles et ont la forme générale d'un carré, en ce qu'elles présentent chacune un fond (12) ayant des ondulations (16) définies par des génératrices s'étendant dans une direction donnée, en ce que les plaques (10) sont disposées en alternance en étant tournées de 90° par rapport à la (aux) plaque(s) adjacente(s), de sorte que chaque canal (22 ; 24) est délimité par des ondulations croisées à 90°, et en ce que l'entrée (26) et la sortie (28) du premier fluide (F1) se situent sensiblement sur une diagonale du carré, tandis que l'entrée (30) et la sortie (32) du second fluide (F2) se situent sensiblement sur une autre diagonale du carré.Heat exchanger comprising a multiplicity of stacked plates (10) each provided with a raised peripheral edge (14), and in which said peripheral edges are assembled in leaktight manner to delimit between the plates first flow channels (22) for a first fluid (F1) which alternate with second flow channels (24) for a second fluid (F2), the exchanger further comprising an inlet (26) and an outlet (28) for the first fluid (F1) as well as an inlet (30) and an outlet (32) for the second fluid (F2),
characterized in that the plates (10) are identical to each other and have the general shape of a square, in that they each have a bottom (12) having undulations (16) defined by generatrices extending in a given direction, in that the plates (10) are alternately arranged by being rotated 90 ° relative to the adjacent plate (s), so that each channel (22; 24) is delimited by corrugations crossed at 90 °, and in that the inlet (26) and the outlet (28) of the first fluid (F1) are located substantially on a diagonal of the square, while the inlet (30) and the outlet ( 32) of the second fluid (F2) are located substantially on another diagonal of the square.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9907835 | 1999-06-21 | ||
| FR9907835A FR2795167B1 (en) | 1999-06-21 | 1999-06-21 | PLATE HEAT EXCHANGER, PARTICULARLY FOR COOLING AN OIL OF A MOTOR VEHICLE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1063488A1 true EP1063488A1 (en) | 2000-12-27 |
| EP1063488B1 EP1063488B1 (en) | 2003-06-25 |
Family
ID=9547056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20000401420 Expired - Lifetime EP1063488B1 (en) | 1999-06-21 | 2000-05-23 | Plate heat exchanger, especially for cooling oil of motor vehicles |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1063488B1 (en) |
| JP (1) | JP2001027490A (en) |
| DE (1) | DE60003496T2 (en) |
| ES (1) | ES2204466T3 (en) |
| FR (1) | FR2795167B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1711768A1 (en) * | 2004-01-23 | 2006-10-18 | Behr GmbH & Co. KG | Heat exchanger, especially oil/coolant cooler |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005012820A1 (en) * | 2003-08-01 | 2005-02-10 | Behr Gmbh & Co. Kg | Heat exchanger and method for the production thereof |
| SE531472C2 (en) * | 2005-12-22 | 2009-04-14 | Alfa Laval Corp Ab | Heat exchanger with heat transfer plate with even load distribution at contact points at port areas |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2216539A1 (en) * | 1973-02-02 | 1974-08-30 | Chaffoteaux Et Maury | |
| WO1989000671A1 (en) * | 1987-07-13 | 1989-01-26 | Pentti Raunio | A method of constructing a heat exchanger and a heat exchanger constructed by using that method |
| EP0611941A2 (en) * | 1993-02-19 | 1994-08-24 | GIANNONI S.r.l. | A plate-type heat exchanger and related plates |
| GB2278430A (en) * | 1993-05-29 | 1994-11-30 | E J Bowman | Plate stack heat exchanger |
| EP0867679A2 (en) * | 1997-03-25 | 1998-09-30 | KTM-Kühler GmbH | Plate-like heat exchanger, more particularly oil cooler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19511991C2 (en) | 1995-03-31 | 2002-06-13 | Behr Gmbh & Co | Plate heat exchanger |
-
1999
- 1999-06-21 FR FR9907835A patent/FR2795167B1/en not_active Expired - Lifetime
-
2000
- 2000-05-23 EP EP20000401420 patent/EP1063488B1/en not_active Expired - Lifetime
- 2000-05-23 DE DE60003496T patent/DE60003496T2/en not_active Expired - Lifetime
- 2000-05-23 ES ES00401420T patent/ES2204466T3/en not_active Expired - Lifetime
- 2000-06-20 JP JP2000184218A patent/JP2001027490A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2216539A1 (en) * | 1973-02-02 | 1974-08-30 | Chaffoteaux Et Maury | |
| WO1989000671A1 (en) * | 1987-07-13 | 1989-01-26 | Pentti Raunio | A method of constructing a heat exchanger and a heat exchanger constructed by using that method |
| EP0611941A2 (en) * | 1993-02-19 | 1994-08-24 | GIANNONI S.r.l. | A plate-type heat exchanger and related plates |
| GB2278430A (en) * | 1993-05-29 | 1994-11-30 | E J Bowman | Plate stack heat exchanger |
| EP0867679A2 (en) * | 1997-03-25 | 1998-09-30 | KTM-Kühler GmbH | Plate-like heat exchanger, more particularly oil cooler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1711768A1 (en) * | 2004-01-23 | 2006-10-18 | Behr GmbH & Co. KG | Heat exchanger, especially oil/coolant cooler |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001027490A (en) | 2001-01-30 |
| DE60003496T2 (en) | 2004-05-19 |
| EP1063488B1 (en) | 2003-06-25 |
| ES2204466T3 (en) | 2004-05-01 |
| FR2795167A1 (en) | 2000-12-22 |
| DE60003496D1 (en) | 2003-07-31 |
| FR2795167B1 (en) | 2001-09-14 |
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