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EP2737269B1 - Heat-exchanger plate - Google Patents

Heat-exchanger plate Download PDF

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Publication number
EP2737269B1
EP2737269B1 EP12737836.2A EP12737836A EP2737269B1 EP 2737269 B1 EP2737269 B1 EP 2737269B1 EP 12737836 A EP12737836 A EP 12737836A EP 2737269 B1 EP2737269 B1 EP 2737269B1
Authority
EP
European Patent Office
Prior art keywords
plate
fluid
heat exchanger
outlet
flat tube
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.)
Revoked
Application number
EP12737836.2A
Other languages
German (de)
French (fr)
Other versions
EP2737269A1 (en
Inventor
Nicolas Vallee
Yoann Naudin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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Filing date
Publication date
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Application filed by Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Priority to PL12737836T priority Critical patent/PL2737269T3/en
Publication of EP2737269A1 publication Critical patent/EP2737269A1/en
Application granted granted Critical
Publication of EP2737269B1 publication Critical patent/EP2737269B1/en
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F28F3/044—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 pontual, e.g. dimples
    • 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
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0308—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0308—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
    • F28D1/0341—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members with U-flow or serpentine-flow inside the conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/083—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning capable of being taken apart
    • 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
    • F28D2021/0082—Charged air coolers

Definitions

  • the invention relates to the field of heat exchangers and more particularly to flat-tube heat exchangers in the field of automobiles.
  • a plate according to the preamble of claim 1 is known from the document US 2010/0032148 . It is known in the field of the automobile to use heat exchangers comprising a stack of identical flat tubes in which a first fluid flows. Each flat tube is formed of two plates of metal sheet stamped to form a bowl in a predefined pattern and arranged in such a way that their concavities are turned towards each other. The two plates are then connected in a sealed manner, thus forming a flat tube in which a fluid can flow from a fluid inlet to a fluid outlet each located at one end of the flat tube, and more generally each located on opposite sides of the tube. the plaque.
  • the flat tubes are stacked on each other, the fluid inlets of each flat tube being connected together to form an inlet column. Similarly, the fluid outlets of each flat tube are interconnected to form an output column. Between each flat tube is left a space for the passage of a second fluid. The exchange of heat between the two fluids thus occurring during the passage of the first fluid in the flat tubes and the second fluid between said flat tubes.
  • Such heat exchangers are commonly used as an evaporator in a refrigerant circuit for the air conditioning of the passenger compartment of a motor vehicle, this refrigerant constituting the first fluid and the second fluid being atmospheric air, or as a radiator. heating in a coolant circuit for heating the passenger compartment of a motor vehicle, the heat transfer fluid constituting the first fluid and the second fluid being atmospheric air.
  • An object of the invention is therefore to at least partially overcome the disadvantages of the prior art and to provide a heat exchanger limiting the pressure losses of the plates.
  • the present invention therefore relates to a plate for heat exchanger flat tube according to claim 1.
  • the first and second fluid flow passages are symmetrical with respect to one another along an axis of symmetry passing through the fluid inlet and outlet, parallel to the width of said plate .
  • the stamping comprises ribs giving the first and second passages a sinuous path comprising half-turns between the fluid inlet and the fluid outlet.
  • the ribs have rounded ends.
  • the first and second fluid flow passages comprise disturbance projections.
  • the length of said plate is greater than or equal to 400mm.
  • the invention also relates to a flat tube for a heat exchanger comprising at least one plate according to the preceding aspects.
  • the flat tube for heat exchanger comprises a first and a second plate according to the preceding aspects.
  • the invention also relates to a heat exchanger comprising at least one flat tube according to the preceding aspects.
  • said heat exchanger is a charge air cooler.
  • Plate 1 for flat heat exchanger tube shown on the figure 1 has a length L and a width h.
  • the plate 1, made from a pressed metal sheet, comprises a fluid inlet 3a and a fluid outlet 3b located along the length L at a distance from the edge of the plate 1 corresponding to L / 2, more or less 40mm.
  • the fluid inlet 3a and fluid outlet 3b are located at the center of the length L of the plate 1.
  • the stamping of the plate 1 forms a cavity with ribs 7 defining a first and a second passage 5a and 5b of fluid flow between the fluid inlet 3a and the fluid outlet 3b.
  • the ribs 7 give the first and second passages 5a, 5b a sinuous path having half-turns between the fluid inlet 3a and the fluid outlet 3b.
  • This sinuous path allows an increase in the length of the first and second passages 5a, 5b and therefore increases the time during which the fluid flows in said first and second passages 5a, 5b, thereby increasing the time or it can have heat transfer from one fluid to another.
  • the ribs 7 may have rounded ends 11.
  • the first and second fluid flow passages 5a, 5b are symmetrical with respect to each other along an axis of symmetry passing through the fluid inlet and outlet 3a, 3b and parallel to the width h of said plate 1 That is, they are identical to each other and have the same shape and length.
  • the flow passages 5a, 5b may also include disruption projections 9 to make the fluid flowing in the flow passages 5a, 5b more homogeneous.
  • the flat tubes are constituted by the assembly of two plates 1 between them, the flow passages 5a and 5b of each of the two plates facing each other.
  • the assembly of the plates 1 is made to be tight, to prevent leakage of the fluid passing through the flow passages 5a, 5b.
  • a flat tube may be the assembly of a plate 1 with a flat plate resting on the periphery of the plate 1 and the ribs 7, covering the flow passages 5a, 5b.
  • a flat tube heat exchanger comprises a stack of flat tubes interconnected at their fluid inlet and outlet 3a, 3b, and each flat tube being spaced apart to allow another fluid to pass between said flat tubes.
  • the flat tubes are connected to each other at the fluid inlet and outlet 3a, 3b in order to form a fluid inlet column comprising all the fluid inlets of all the flat tubes and a fluid outlet column comprising all the outlets. of fluid from all the flat tubes.
  • the fluid inlet and outlet columns are located in the center of the heat exchanger.
  • This configuration makes it possible to have only one refrigerant inlet column 30a and a single refrigerant outlet column 30b and thus to overcome the constraints and costs associated with the use of two heat exchangers. and therefore requiring two coolant inlet columns and two coolant outlet columns.

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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

L'invention concerne le domaine des échangeurs de chaleur et plus particulièrement les échangeurs de chaleur à tube plat dans le domaine de l'automobile. Une plaque selon le préambule de la revendication 1 est connue du document US 2010/0032148 . Il est connu dans le domaine de l'automobile d'utiliser des échangeurs de chaleurs comprenant un empilement de tubes plats identiques dans lesquels circules un premier fluide. Chaque tube plat est formé de deux plaques de tôle de métal embouties afin de former une cuvette selon un motif prédéfini et agencées de telles façons que leurs concavités sont tournées l'une vers l'autre. Les deux plaques sont alors reliées de façon étanche, formant ainsi un tube plat dans lequel peut circuler un fluide depuis une entrée de fluide vers une sortie de fluide chacune située à une extrémité du tube plat, et plus généralement chacune située sur des cotés opposés de la plaque.The invention relates to the field of heat exchangers and more particularly to flat-tube heat exchangers in the field of automobiles. A plate according to the preamble of claim 1 is known from the document US 2010/0032148 . It is known in the field of the automobile to use heat exchangers comprising a stack of identical flat tubes in which a first fluid flows. Each flat tube is formed of two plates of metal sheet stamped to form a bowl in a predefined pattern and arranged in such a way that their concavities are turned towards each other. The two plates are then connected in a sealed manner, thus forming a flat tube in which a fluid can flow from a fluid inlet to a fluid outlet each located at one end of the flat tube, and more generally each located on opposite sides of the tube. the plaque.

Les tubes plats sont empilés les uns sur les autres, les entrées de fluides de chaque tube plat étant reliées entre elles pour former une colonne d'entrée. De même, les sorties de fluides de chaque tube plat sont reliées entre elles pour former une colonne de sortie. Entre chaque tube plat est laissé un espace pour le passage d'un second fluide. L'échange de chaleur entre les deux fluides se faisant ainsi lors du passage du premier fluide dans les tubes plats et du second fluide entre lesdits tubes plats.The flat tubes are stacked on each other, the fluid inlets of each flat tube being connected together to form an inlet column. Similarly, the fluid outlets of each flat tube are interconnected to form an output column. Between each flat tube is left a space for the passage of a second fluid. The exchange of heat between the two fluids thus occurring during the passage of the first fluid in the flat tubes and the second fluid between said flat tubes.

Il est également connu afin d'augmenter la longueur du tube plat et donc la surface d'échange entre les deux fluides, de faire suivre au tube plat un circuit tortueux en conservant des nervures sur les plaques lors de l'emboutissage. Dans ce type d'échangeur, les colonnes d'entrée et de sortie peuvent ainsi être positionnées sur des cotés opposées des plaques ou bien sur un même coté des plaques, comme cela est montré dans la demande EP2105694 .It is also known to increase the length of the flat tube and thus the exchange surface between the two fluids, to follow the flat tube circuit tortuous retaining ribs on the plates during stamping. In this type of exchanger, the input and output columns can thus be positioned on opposite sides of the plates or on the same side of the plates, as shown in the application EP2105694 .

De tels échangeurs de chaleur sont couramment utilisés comme évaporateur dans un circuit de fluide réfrigérant pour la climatisation de l'habitacle d'un véhicule automobile, ce fluide réfrigérant constituant le premier fluide et le second fluide étant de l'air atmosphérique, ou comme radiateur de chauffage dans un circuit de fluide caloporteur pour le chauffage de l'habitacle d'un véhicule automobile, ce fluide caloporteur constituant le premier fluide et le second fluide étant de l'air atmosphérique.Such heat exchangers are commonly used as an evaporator in a refrigerant circuit for the air conditioning of the passenger compartment of a motor vehicle, this refrigerant constituting the first fluid and the second fluid being atmospheric air, or as a radiator. heating in a coolant circuit for heating the passenger compartment of a motor vehicle, the heat transfer fluid constituting the first fluid and the second fluid being atmospheric air.

Néanmoins dans le cas d'une utilisation d'un échangeur de grande longueur pour refroidir un flux d'air comprimé faisant office de second fluide, par exemple en sortie d'un turbocompresseur, et placé au plus près des entrées d'airs des cylindres de combustion du moteur, il y a un problème du fait de la perte de charge due à la longueur de la plaque nécessaire pour couvrir au mieux la surface définie par l'ensemble des cylindre. En effet, plus l'on s'éloigne de la colonne d'entrée du premier fluide, par exemple de l'eau ou un fluide réfrigérant, moins le second fluide, ici l'air, est refroidi efficacement.However, in the case of using a long heat exchanger to cool a compressed air stream acting as a second fluid, for example at the outlet of a turbocharger, and placed closer to the air inlets of the cylinders combustion of the engine, there is a problem due to the pressure drop due to the length of the plate necessary to cover the best area defined by the set of cylinders. Indeed, the further one moves away from the inlet column of the first fluid, for example water or a refrigerant, the less the second fluid, here air, is effectively cooled.

Un des buts de l'invention est donc de remédier au moins partiellement aux inconvénients de l'art antérieur et de proposer un échangeur de chaleur limitant les pertes de charge des plaques.An object of the invention is therefore to at least partially overcome the disadvantages of the prior art and to provide a heat exchanger limiting the pressure losses of the plates.

La présente invention concerne donc une plaque pour tube plat d'échangeur de chaleur selon la revendication 1.The present invention therefore relates to a plate for heat exchanger flat tube according to claim 1.

Selon un aspect de l'invention, les premier et second passages d'écoulement de fluide sont symétriques l'un par rapport à l'autre suivant un axe de symétrie passant par les entrée et sortie de fluide, parallèlement à la largeur de ladite plaque.According to one aspect of the invention, the first and second fluid flow passages are symmetrical with respect to one another along an axis of symmetry passing through the fluid inlet and outlet, parallel to the width of said plate .

Selon l'invention, l'emboutissage comporte des nervures donnant aux premier et second passages un trajet sinueux comportant des demi-tours entre l'entrée de fluide et la sortie de fluide.According to the invention, the stamping comprises ribs giving the first and second passages a sinuous path comprising half-turns between the fluid inlet and the fluid outlet.

Selon l'invention, les nervures comportent des extrémités arrondies.According to the invention, the ribs have rounded ends.

Selon l'invention, les premier et second passages d'écoulement de fluide comportent des saillies de perturbation.According to the invention, the first and second fluid flow passages comprise disturbance projections.

Selon un aspect de l'invention, la longueur de ladite plaque est supérieure ou égale à 400mm.According to one aspect of the invention, the length of said plate is greater than or equal to 400mm.

L'invention concerne également un tube plat pour échangeur de chaleur comportant au moins une plaque selon les aspects précédents.The invention also relates to a flat tube for a heat exchanger comprising at least one plate according to the preceding aspects.

Selon un autre aspect de l'invention, le tube plat pour échangeur de chaleur comporte une première et une seconde plaque selon les aspects précédents.According to another aspect of the invention, the flat tube for heat exchanger comprises a first and a second plate according to the preceding aspects.

L'invention concerne également un échangeur de chaleur comportant au moins un tube plat selon les aspects précédents.The invention also relates to a heat exchanger comprising at least one flat tube according to the preceding aspects.

Selon un autre aspect de l'invention, ledit échangeur de chaleur est un refroidisseur d'air de suralimentation.According to another aspect of the invention, said heat exchanger is a charge air cooler.

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante, donnée à titre d'exemple illustratif et non limitatif, parmi lesquelles :

  • la figure 1 montre une représentation schématique d'une plaque pour tube plat d'échangeur de chaleur,
  • La figure 2 montre une représentation schématique d'un échangeur de chaleur avec un circuit de refroidissement d'un fluide.
Other features and advantages of the invention will appear more clearly on reading the following description, given by way of illustrative and non-limiting example, among which:
  • the figure 1 shows a schematic representation of a plate for heat exchanger flat tube,
  • The figure 2 shows a schematic representation of a heat exchanger with a cooling circuit of a fluid.

La plaque 1 pour tube plat d'échangeur de chaleur représenté sur la figure 1 a une longueur L et une largeur h. La plaque 1, réalisée à partir d'une tôle de métal emboutie, comporte une entrée de fluide 3a et une sortie de fluide 3b situées sur la longueur L à une distance du bord de la plaque 1 correspondant à L/2, plus ou moins 40mm. Préférentiellement, les entrée de fluide 3a et sortie de fluide 3b sont situées au centre de la longueur L de la plaque 1. L'emboutissage de la plaque 1 forme une cavité avec des nervures 7 définissant un premier et un second passage 5a et 5b d'écoulement de fluide entre l'entrée de fluide 3a et la sortie de fluide 3b.Plate 1 for flat heat exchanger tube shown on the figure 1 has a length L and a width h. The plate 1, made from a pressed metal sheet, comprises a fluid inlet 3a and a fluid outlet 3b located along the length L at a distance from the edge of the plate 1 corresponding to L / 2, more or less 40mm. Preferably, the fluid inlet 3a and fluid outlet 3b are located at the center of the length L of the plate 1. The stamping of the plate 1 forms a cavity with ribs 7 defining a first and a second passage 5a and 5b of fluid flow between the fluid inlet 3a and the fluid outlet 3b.

Les nervures 7 donnent aux premier et second passages 5a, 5b un trajet sinueux comportant des demi-tours entre l'entrée de fluide 3a et la sortie de fluide 3b. Ce trajet sinueux permet une augmentation de la longueur du premier et second passage 5a, 5b et donc d'augmenter le temps durant lequel le fluide s'écoule dans lesdits premier et second passages 5a, 5b, augmentant de fait le temps ou il peut y avoir transfert de chaleur d'un fluide à un autre.The ribs 7 give the first and second passages 5a, 5b a sinuous path having half-turns between the fluid inlet 3a and the fluid outlet 3b. This sinuous path allows an increase in the length of the first and second passages 5a, 5b and therefore increases the time during which the fluid flows in said first and second passages 5a, 5b, thereby increasing the time or it can have heat transfer from one fluid to another.

Afin de faciliter cet écoulement du fluide dans les premier et second passages, les nervures 7 peuvent avoir des extrémités 11 arrondies.In order to facilitate this fluid flow in the first and second passages, the ribs 7 may have rounded ends 11.

Les premier et second passages d'écoulement 5a, 5b de fluide sont symétriques l'un par rapport à l'autre suivant un axe de symétrie passant par les entrée et sortie de fluide 3a, 3b et parallèle à la largeur h de ladite plaque 1. C'est-à-dire qu'ils sont identiques l'un l'autre et ont la même forme et la même longueur.The first and second fluid flow passages 5a, 5b are symmetrical with respect to each other along an axis of symmetry passing through the fluid inlet and outlet 3a, 3b and parallel to the width h of said plate 1 That is, they are identical to each other and have the same shape and length.

Les passages d'écoulement 5a, 5b peuvent également comporter des saillies 9 de perturbation afin de rendre plus homogène le fluide s'écoulant dans les passages d'écoulement 5a, 5b.The flow passages 5a, 5b may also include disruption projections 9 to make the fluid flowing in the flow passages 5a, 5b more homogeneous.

Les tubes plat sont constitués par l'assemblage de deux plaques 1 entre elles, les passages d'écoulement 5a et 5b de chacune des deux plaques se faisant face. L'assemblage des plaques 1 est réalisé de façon à être étanche, afin d'éviter toutes fuites du fluide passant dans les passages d'écoulement 5a, 5b.The flat tubes are constituted by the assembly of two plates 1 between them, the flow passages 5a and 5b of each of the two plates facing each other. The assembly of the plates 1 is made to be tight, to prevent leakage of the fluid passing through the flow passages 5a, 5b.

Un autre mode de réalisation d'un tube plat peut être l'assemblage d'une plaque 1 avec une plaque plane reposant sur la périphérie de la plaque 1 et les nervures 7, recouvrant les passages d'écoulement 5a, 5b.Another embodiment of a flat tube may be the assembly of a plate 1 with a flat plate resting on the periphery of the plate 1 and the ribs 7, covering the flow passages 5a, 5b.

Un échangeur de chaleur à tube plat comporte un empilement de tubes plats reliés entre eux au niveau de leur entrée et sortie de fluide 3a, 3b, et chaque tube plat étant espacé afin de permettre le passage d'un autre fluide entre lesdits tubes plats. Les tubes plats sont reliés entre eux au niveau des entrée et sortie de fluide 3a, 3b afin de former une colonne d'entrée de fluide regroupant toutes les entrées de fluide de tout les tubes plats et une colonne de sortie de fluide regroupant toutes les sorties de fluide de tout les tubes plats.A flat tube heat exchanger comprises a stack of flat tubes interconnected at their fluid inlet and outlet 3a, 3b, and each flat tube being spaced apart to allow another fluid to pass between said flat tubes. The flat tubes are connected to each other at the fluid inlet and outlet 3a, 3b in order to form a fluid inlet column comprising all the fluid inlets of all the flat tubes and a fluid outlet column comprising all the outlets. of fluid from all the flat tubes.

Du fait de l'utilisation de plaques 1 selon l'invention pour réaliser les tubes plats, les colonnes d'entrée et de sortie de fluides sont situées au centre de l'échangeur de chaleur.Due to the use of plates 1 according to the invention for producing the flat tubes, the fluid inlet and outlet columns are located in the center of the heat exchanger.

Ainsi pour une même longueur L de plaque 1, donc de tube plat et d'échangeur de chaleur, l'éloignement entre les entrées et sorties de fluide 3a et 3b et l'extrémité de la plaque reste le plus faible possible, limitant de fait les pertes des charges.Thus, for the same length L of plate 1, therefore of flat tube and of heat exchanger, the distance between the fluid inlets and outlets 3a and 3b and the end of the plate remains as small as possible, thereby limiting the losses of the charges.

Cette caractéristique est d'autant plus importante pour les plaques 1 pour tube plat d'échangeur de chaleur qui ont une longueur L supérieure ou égale à 400mm. En effet, c'est pour une telle longueur L que les pertes de charges sont significatives pour des plaques selon l'art antérieur.This characteristic is even more important for plates 1 for flat heat exchanger tube which have a length L greater than or equal to 400mm. Indeed, it is for such a length L that the pressure losses are significant for plates according to the prior art.

Ainsi dans le cas d'un échangeur de chaleur placé au plus près des entrées d'airs de cylindres de combustion d'un moteur dans le but de refroidir au moyen d'un fluide réfrigérant circulant dans les tubes plats, le flux d'air venant par exemple d'un turbocompresseur et s'engouffrant dans chaque cylindre, le fait que les entrée et sortie de fluide réfrigérant 3a, 3b soient centrées sur la longueur L des plaques 1, permet que ledit flux d'air soit refroidit efficacement et ce même pour les cylindres de combustion les plus éloignés des entrée et sortie de fluide réfrigérant 3a, 3b, réduisant ainsi les risques d'autoallumage.Thus, in the case of a heat exchanger placed as close as possible to the air intakes of combustion cylinders of an engine in order to cool by means of a refrigerant circulating in the flat tubes, the air flow for example from a turbocharger and engulfing in each cylinder, the fact that the refrigerant inlet and outlet 3a, 3b are centered on the length L of the plates 1, allows said airflow to be cooled efficiently and even for the combustion cylinders furthest away from the refrigerant inlet and outlet 3a, 3b, thus reducing the risks of self-ignition.

De plus une telle configuration des plaques 1 permet notamment d'obtenir un échangeur de chaleur 20 de type d'un refroidisseur d'air de suralimentation, capable de refroidir un même flux d'air 2 fois comme montrés par la figure 2.In addition, such a configuration of the plates 1 makes it possible in particular to obtain a heat exchanger 20 of the type of a charge air cooler, capable of cooling the same air flow 2 times as shown by FIG. figure 2 .

Ainsi, pour le refroidissement d'un flux d'air venant du circuit d'échappement 22, ledit flux d'air est refroidit une première fois au niveau des premiers passages d'écoulement 5a avant d'être comprimé et donc réchauffé au niveau d'un turbocompresseur 24. Le flux d'air repasse de nouveau dans l'échangeur de chaleur au niveau des seconds passages d'écoulement 5b avant de s'engouffrer dans les cylindres de combustion 26.Thus, for the cooling of an air flow coming from the exhaust circuit 22, said air flow is cooled a first time at the first flow passages 5a before being compressed and thus reheated to the level of A turbocharger 24. The air flow re-flows back into the heat exchanger at the second flow passages 5b before rushing into the combustion cylinders 26.

Cette configuration permet de n'avoir qu'une seule colonne d'entrée de fluide réfrigérant 30a et une seule colonne de sortie de fluide réfrigérant 30b et ainsi de s'affranchir des contraintes et des coûts liées à l'utilisation de deux échangeurs de chaleur et donc nécessitant deux colonnes d'entrée de fluide réfrigérant et deux colonnes de sortie de fluide réfrigérant.This configuration makes it possible to have only one refrigerant inlet column 30a and a single refrigerant outlet column 30b and thus to overcome the constraints and costs associated with the use of two heat exchangers. and therefore requiring two coolant inlet columns and two coolant outlet columns.

Claims (7)

  1. Plate (1) for a flat tube of a heat exchanger, which plate is made from a chased metal sheet, said chasing allowing a fluid inlet (3a) and a fluid outlet (3b) to connect, said plate having a length (L) and a width (h), said fluid inlet and outlet (3a, 3b) being situated along the length (L) at a distance from the edge of the plate (1) that corresponds to L/2, plus or minus 40 mm, the chasing forming a first fluid flow passage (5a) situated on a first side of said fluid inlet and outlet (3a, 3b), and a second fluid flow passage (5b) situated on a second side, the opposite side to the first, of said fluid inlet and outlet (3a, 3b), characterized in that the chasing comprises ribs (7) that give the first and second passages (5a, 5b) a sinuous path comprising about-turns between the fluid inlet (3a) and the fluid outlet (3b) and in that the ribs (7) have rounded ends (11), the first and second fluid flow passages (5a, 5b) comprising perturbation projections (9).
  2. Plate (1) according to Claim 1, characterized in that the first and second fluid flow passages (5a, 5b) are symmetric with one another about an axis of symmetry that passes through the fluid inlet and outlet (3a, 3b) parallel to the width (h) of said plate (1).
  3. Plate (1) according to either of the preceding claims, characterized in that the length (L) of said plate (1) is greater than or equal to 400 mm.
  4. Flat tube for a heat exchanger, characterized in that it comprises at least one plate (1) according to one of Claims 1 to 3.
  5. Flat tube for a heat exchanger according to the preceding claim, characterized in that it comprises a first and a second plate (1) according to one of Claims 1 to 3.
  6. Heat exchanger, characterized in that it comprises at least one flat tube according to either of Claims 4 and 5.
  7. Heat exchanger according to the preceding claim, characterized in that said heat exchanger is a charge air cooler.
EP12737836.2A 2011-07-25 2012-07-24 Heat-exchanger plate Revoked EP2737269B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12737836T PL2737269T3 (en) 2011-07-25 2012-07-24 Heat-exchanger plate

Applications Claiming Priority (2)

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FR1156753A FR2978538B1 (en) 2011-07-25 2011-07-25 HEAT EXCHANGER PLATE.
PCT/EP2012/064499 WO2013014155A1 (en) 2011-07-25 2012-07-24 Heat-exchanger plate

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EP2737269A1 EP2737269A1 (en) 2014-06-04
EP2737269B1 true EP2737269B1 (en) 2017-04-12

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US (1) US20140216702A1 (en)
EP (1) EP2737269B1 (en)
JP (1) JP6100257B2 (en)
CN (1) CN103975214B (en)
FR (1) FR2978538B1 (en)
MX (1) MX347583B (en)
PL (1) PL2737269T3 (en)
WO (1) WO2013014155A1 (en)

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Also Published As

Publication number Publication date
PL2737269T3 (en) 2017-08-31
CN103975214A (en) 2014-08-06
FR2978538B1 (en) 2015-06-19
MX347583B (en) 2017-05-02
WO2013014155A1 (en) 2013-01-31
JP6100257B2 (en) 2017-03-22
FR2978538A1 (en) 2013-02-01
US20140216702A1 (en) 2014-08-07
CN103975214B (en) 2017-08-04
EP2737269A1 (en) 2014-06-04
MX2014000997A (en) 2014-05-13
JP2014521913A (en) 2014-08-28

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