EP2105694B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP2105694B1
EP2105694B1 EP09155763.7A EP09155763A EP2105694B1 EP 2105694 B1 EP2105694 B1 EP 2105694B1 EP 09155763 A EP09155763 A EP 09155763A EP 2105694 B1 EP2105694 B1 EP 2105694B1
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EP
European Patent Office
Prior art keywords
plate
plates
wall
heat exchanger
fluid
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Application number
EP09155763.7A
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German (de)
French (fr)
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EP2105694A1 (en
Inventor
Sylvain Moreau
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Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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Classifications

    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/04—Reinforcing means for conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts

Definitions

  • the invention relates to a heat exchanger for exchanging heat between a first fluid and a second fluid.
  • the heat exchanger comprises a stack of identical pouches or tubes in which a first fluid circulates, each formed of two plates of metal sheet shaped cups according to the present invention.
  • the plates are arranged in such a way that their concavities are turned toward each other.
  • the plates are sealed to each other at their periphery, in particular by brazing.
  • Such a heat exchanger is described in particular in the document US3207216 .
  • Such a heat exchanger is 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.
  • the document US5186250A discloses a flat tube which comprises either a pair of planar walls which are spaced a predetermined distance apart from each other, the planar walls having respective lateral ends connected to each other by a folded portion U, the planar walls further having other lateral ends which abut against each other and are firmly attached to each other, the flat tube comprises a pair of preformed plates having abutting portions and welded at both lateral ends.
  • the tube further comprises one or more curved lugs integrally formed with an inner surface of each planar wall and projecting inwardly from an inner surface of each planar wall, and the curved lugs have inner peaks respectively. so that the inner vertices protruding from a flat wall bear against the inner surface of the other flat wall or against the inner peaks of the other curved lugs projecting from said other planar wall.
  • the atmospheric air passing through the heat exchangers is loaded with particles, in particular water and / or impurities.
  • the particles come into contact with the surfaces of the plates constituting the pockets or tubes.
  • such particles come into contact with the areas of sealed contacts between two plates.
  • the object of the invention is therefore to provide a heat exchanger overcoming the aforementioned drawbacks.
  • the invention therefore provides a heat exchanger omterrorism at least a flat tube composed of a first plate and a second plate, each plate being made from a stamped metal sheet having a peripheral edge contained in a plane and forming a connecting zone, each plate having a first and a second large sides and a first and a second small sides, and comprising at least one wall extending from the peripheral edge perpendicular to the plane containing the peripheral edge.
  • Such a wall makes it possible to protect the junction between two plates forming a heat exchanger tube. Indeed, during the assembly of two plates together, the wall of one of the plates comes to cover the junction zone between the plates and thus isolate this zone from the external elements, in particular the drops of water, the metal particles , ...
  • the plate has a first and a second large sides and a first and second small sides. According to the invention, the wall extends over the entire length of the first large side.
  • the wall is also arranged on at least a portion of the first and / or second small side (s).
  • the plate has a plane of symmetry perpendicular to the long sides.
  • the stamped metal sheet has a thickness less than or equal to 0.35 mm.
  • the first plate and the second plate are arranged in such a way that the first large side of the first plate cooperates with the second large side of the second plate.
  • the figure 1 represents, in perspective, a heat exchanger 1.
  • the heat exchanger 1 is of the plate type, comprising a stack of flat tubes 2, each consisting of a pair of facing plates 4 joined together.
  • the assembled plates 4 define between them a passage 6 for the flow a fluid, in particular a cooling fluid of an air conditioning loop or a heat transfer fluid of a heating mouth.
  • Each plate 4 having openings forming a fluid inlet 8 for introducing fluid into the fluid flow passage 6 and a fluid outlet 10 for discharging the fluid from the fluid flow passage 6.
  • the plate 4 also comprises a central rib 14 on the surface of its inner wall which form a projection in the flow passage 6 of the fluid.
  • the rib 14 of the first plate 4 forming the flat tube 2 is kept in contact with the rib 14 facing the second plate 4 forming the flat tube 2 in order to create a separation in the flow passage 6 of the fluid for circulation fluid between the fluid inlet 8 and the fluid outlet 10 thus forming a circulation 'U'.
  • the plate 4 comprises a multitude of projections 12 on the surface of its inner wall which form protrusions in the flow passage 6 of the fluid.
  • the projections 12 of each of the plates 4 are arranged in rows which extend in the direction of the flow passage of the fluid.
  • the projections 12 of a plate 4 of each pair of plates 4 are kept in contact with the ribs facing the other plate 4.
  • plates 4 do not have protrusions 12 and are smooth.
  • the heat exchanger 1 extends over a height H in a z direction, a width L in a direction x and a depth P in a direction y.
  • the directions x, y and z form a direct dihedron.
  • the heat exchanger 1 comprises a series of flat tubes 2 arranged alternately across the width L with tabs 16 in the x direction.
  • the flat tubes 2 extend over the height H. Over most of this height, the passages 6 of the flat tubes 2 have a substantially constant thickness 'e' formed by the gap between two plates 4 of the same pair.
  • the heat exchanger 1 comprises at the fluid inlet 8 and the fluid outlet 10 bulges 18 of a thickness greater than the thickness 'e' of the passages 6 of the flat tubes 2.
  • the bulge 18 d a plate 4 form with the bulge 18 of the plate 4 of the same pair of plates 4 a fluid circulation space acting as a fluid inlet manifold and a fluid outlet manifold.
  • Each input collector of a pair of plates 4 is in contact with the input collector of a pair of neighboring plates 4 in the x direction.
  • each output collector of a pair of plates 4 is in contact with the output collector of a pair of neighboring plates 4 in the x direction.
  • the stack of flat tubes 2 creates, between two pairs of adjacent plates 4 in the x direction, an interval.
  • Each of these gaps is lined with an interlayer 16 formed from a heat conductive corrugated thin sheet, the ridges of which are in alternating contact with the two plates 4 of the flat tubes 2 delimiting the gap.
  • an air flow 50 represented on the figure 5 , can flow in the intervals arranged between two pairs of neighboring plates 4 in the x direction, through the inserts 16, for exchanging heat, with the fluid flowing in the passages 6 of the flat tubes 2
  • a bundle of the heat exchanger 1 is formed by the stack of flat tubes 2 alternating with the spacers 16. The bundle is terminated, in the x direction, by two end plates 20.
  • the assembly constituted by the flat tubes 2, the spacers 16 and the end plates 20 is secured to form a unitary element forming the heat exchanger beam 1.
  • the fastening of the assembly is carried out, for example by brazing.
  • the connection of the heat exchanger 1 to a fluid circuit to which it is integrated is through pipes 24, generally made of aluminum, opening respectively into the inlet manifold and the outlet manifold of the heat exchanger 1.
  • the pipes 24 are held integral with the beam of the heat exchanger 1, in particular by brazing.
  • the pipes 24 are connected to the fluid circuit by connecting members 22.
  • All flat tubes 2 are identical and consist of two plates 4 made from sheet metal stamped cups.
  • the sheet forming the plate 4 is of a thickness 'th'. It is particularly advantageous that the thickness 'th' of the sheet forming the plate 4 is less than or equal to 0.35 mm.
  • Each plate 4 is formed of two long sides 26 extending over a height H in the z direction connected by two small sides 28 extending over a depth P in the y direction.
  • Each plate 4 has a peripheral edge 30 forming a contour of the plate 4 extending at the large sides 26 in the y direction and at the small sides 28 in the z direction.
  • the peripheral edge 30 is contained in a plane P.
  • the plane P is such generally parallel to the plane containing the inner wall of the plate 4 and is distant from this plane by a distance substantially equal to half the thickness 'e' of the passages 6 of the flat tubes 2.
  • the plane P contains the peripheral edge 30 of the plate 4.
  • the plane P of the first plate 4 coincides with the plane P of the second plate 4.
  • Each plate 4 of the same pair of plates 4 are joined together tightly over their entire contour at their respective peripheral edge 30 to define passage 6 for the flow of a fluid.
  • the plate 2 also comprises a wall 40 extending from the peripheral edge 30.
  • the wall 40 is not contained in the plane P.
  • the wall 40 is perpendicular to the plane P and extends in the x direction to the opposite of the inner wall of the plate 4.
  • the wall 40 extends in the x direction of a height 'f'.
  • the height 'f' is greater than or equal to the thickness 'th' of the sheet of the plate 4.
  • the wall 40 extends over one of the long sides 26 over at least a portion of the height H of the plate 4. In a complementary and particularly advantageous manner, the wall 40 extends over the small sides 28 over part of the depth P of the plate 4.
  • the wall 40 extends over the entire height H of the plate 4. Similarly, it extends particularly advantageously over half the depth P of the plate 4.
  • the wall 40 is continuous along the peripheral edge 30 of the plate 4.
  • the wall 40 extends only on one of the long sides 26 of the plate 4.
  • Each of the two plates 4 constituting the flat tube 4 comprises a wall 40.
  • the figure 5 is a sectional view according to section VV of the figure 1 of the heat exchanger 1 and the figure 5a present is a detailed view of the tube junction zone of a heat exchanger 1.
  • the flat tubes 2 are constituted by the assembly of two plates 4 between them.
  • the plates 4 are joined on their contour at their respective peripheral edge 30 to form a connecting zone 42.
  • the latter extends over the entire outer contour of the flat tube 2.
  • connection zone 42 ensures the tight closure of the flat tubes 2 and, more particularly, the passages 6 of fluid vis-à-vis the outside.
  • the connecting zone 42 constitutes an impervious interface to the air flow 50 for the fluid flowing in the flat tubes 2.
  • the wall 40 covers the connecting zone 42.
  • the wall 40 constitutes a protection of the connection zone 42 with respect to the air flow 50.
  • the air stream 50 is charged with particles, in particular water or metal such as copper.
  • the wall 40 avoids any direct contact between the connection zone 42 and the air flow 50.
  • the risks associated with the particles of the air flow 50, in particular corrosion, are reduced. This reduces the risk of corrosion and therefore the risk of leakage of flat tubes.
  • the wall 40 also makes it possible to improve the rigidity of the plate 4.
  • the wall 40 constitutes a rib for stiffening the plate 4. This is particularly advantageous in the context of reducing the thickness of the plate 4
  • the wall 40 thus makes it possible, once assembled to another plate 40, to define a particularly rigid tube 2. This property affects the mechanical strength of the beam of the heat exchanger 1 and contributes to the mechanical strength of the latter.
  • the figure 6 is a detail view of the top of the heat exchanger 1. As shown on the figure 6 each connecting zone 42 of a pair of plates 4 is covered by the wall 40. Thus, the air flow 50 comes into contact with the wall 40. The connection zone 42 is thus protected from the air flow.
  • the tightness of the assembly of the flat tubes 4 is guaranteed.
  • the plate 4 of the exchanger comprises a plane of symmetry perpendicular to the long sides 26.
  • the plate 4 comprises, in addition to the openings forming the fluid inlet 8 and the fluid outlet 10 disposed in upper part of the plate 4, openings in the lower part of the plate 4 to achieve communication with neighboring pairs of plates.
  • Plate 4 according to figures 7 and 8 is identical in structure to the plate 4 according to the Figures 2-4 . It is distinguished by the presence of two series of openings 110, 120, 160 and 180 disposed at the two ends of the plate 4.
  • the plate 4 of the figure 7 has two channels 240 and 220 fluidically connecting respectively a first opening 110 of a first end of the plate 4 with a first opening 160 of a second end of the plate 4 and a second opening 120 of the first end of the plate 4 with a second opening 180 of the second end of the plate 4.
  • the channels 220 and 240 are separated by a rib 140 central.
  • the plate 4 is such that the flat tube 2 is formed of two identical plates 4 arranged head to tail.
  • the channel 220 of a first plate 4 constituting the flat tube 2 faces the channel 240 of the second plate 4 constituting the flat tube 2 and vice versa.
  • the tightness between the two fluid passages thus created in the tube 2 is achieved by contacting the respective ribs 140 of the plates 4 forming the flat tube 2.
  • This embodiment has the additional advantage of allowing the manufacture of a single model 4 plates that will be used for the production of flat tubes 2 and heat exchangers 1. It thus has a significant benefit from a point of view of standardization and production rates.
  • figure 8 is a perspective view of a plate of the heat exchanger according to the invention.
  • Notches 210 are formed in the wall 40 of the plate 4.
  • the wall 40 comprises two notches 210. This number is in no way limiting.
  • each notch 210 there are lugs 200 that are maneuvered opposite the notches 210 by symmetry with respect to a plane passing through the rib 140 and perpendicular to the general plane of the plate 4.
  • the notches 210 of a first plate 4 come into cooperation with the lugs 200 of the second plate 4 and vice versa in order to facilitate the assembly and cohesion of the plates 4 between them.
  • the lugs 200 serve as crimping tabs and make it possible to close the peripheral contour of the flat tube 4.
  • the first exemplary embodiment has been described with tubes forming tubes having a U-shaped fluid circulation.
  • the second embodiment covers the plates for flat tube forming an 'I' circulation.
  • the present invention finds a particular application when a heat exchanger must be developed, for example for a heating, ventilation and / or air conditioning system for motor vehicles.
  • the present invention is particularly suitable for heat exchangers such as heating or cooling radiators, evaporators, condensers or gas coolers integrated in a heating, ventilation and / or air conditioning system of a motor vehicle.

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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 un échangeur de chaleur pour l'échange de chaleur entre un premier fluide et un second fluide.The invention relates to a heat exchanger for exchanging heat between a first fluid and a second fluid.

Plus particulièrement, l'échangeur de chaleur comprend un empilement de pochettes ou tubes identiques dans lesquelles circule un premier fluide, formés chacun de deux plaques de tôle de métal embouties en forme de cuvettes selon la présente invention. Les plaques sont agencées de telle façon que leurs concavités sont tournées l'une vers l'autre. Par ailleurs, les plaques sont mutuellement reliées de façon étanche à leur périphérie, notamment par brasage. Un tel échangeur de chaleur est notamment décrit dans le document US3207216 .More particularly, the heat exchanger comprises a stack of identical pouches or tubes in which a first fluid circulates, each formed of two plates of metal sheet shaped cups according to the present invention. The plates are arranged in such a way that their concavities are turned toward each other. Furthermore, the plates are sealed to each other at their periphery, in particular by brazing. Such a heat exchanger is described in particular in the document US3207216 .

Un tel échangeur de chaleur est couramment utilisé 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 a heat exchanger is 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.

Le document US5186250A révèle un tube plat qui comprend soit une paire de parois planes qui sont espacées d'une distance prédéterminée l'une de l'autre, les parois planes ayant respectivement des extrémités latérales reliées l'une a l'autre par une partie pliée en forme de U, les parois planes ayant en outre d'autres extrémités latérales qui sont en butée l'une contre l'autre et sont solidement fixées l'une contre l'autre, soit le tube plat comprend une paire de plaques préformées ayant des parties en butée et soudées aux deux extrémités latérales. Le tube comprend en outre une ou plusieurs oreilles courbes faisant partie intégrante d'une surface intérieure de chaque paroi plane et faisant saillie vers l'intérieur à partir d'une surface intérieure de chaque paroi plane, et les oreilles courbes ont respectivement des sommets intérieurs de sorte que les sommets intérieurs faisant saillie d'une paroi plane s'appuient contre la surface intérieure de l'autre paroi plane ou contre les sommets intérieurs des autres oreilles courbes faisant saillie a partir de ladite autre paroi plane.The document US5186250A discloses a flat tube which comprises either a pair of planar walls which are spaced a predetermined distance apart from each other, the planar walls having respective lateral ends connected to each other by a folded portion U, the planar walls further having other lateral ends which abut against each other and are firmly attached to each other, the flat tube comprises a pair of preformed plates having abutting portions and welded at both lateral ends. The tube further comprises one or more curved lugs integrally formed with an inner surface of each planar wall and projecting inwardly from an inner surface of each planar wall, and the curved lugs have inner peaks respectively. so that the inner vertices protruding from a flat wall bear against the inner surface of the other flat wall or against the inner peaks of the other curved lugs projecting from said other planar wall.

L'air atmosphérique traversant les échangeurs de chaleur est chargé de particules, notamment d'eau et/ou d'impuretés.The atmospheric air passing through the heat exchangers is loaded with particles, in particular water and / or impurities.

A la traversée des échangeurs de chaleurs, les particules viennent en contact avec les surfaces des plaques constituant les pochettes ou tubes. En particulier, de telles particules viennent en contact avec les zones de contacts étanches entre deux plaques.At the crossing of the heat exchangers, the particles come into contact with the surfaces of the plates constituting the pockets or tubes. In particular, such particles come into contact with the areas of sealed contacts between two plates.

Une telle manifestation contribue à un phénomène de corrosion des plaques.Such an event contributes to a corrosion phenomenon of the plates.

Cela est particulièrement dommageable au niveau des zones de contact étanches entre les plaques car cela entraîne une perte d'étanchéité. Ceci a pour conséquence des fuites du fluide (fluide réfrigérant ou fluide caloporteur).This is particularly damaging in the areas of sealed contact between the plates as this results in a loss of tightness. This results in leakage of the fluid (refrigerant or heat transfer fluid).

L'objet de l'invention est donc de proposer un échangeur de chaleur surmontant les inconvénients précités.The object of the invention is therefore to provide a heat exchanger overcoming the aforementioned drawbacks.

L'invention prévoit donc un échangeur de chaleur omprenant au moins un tube plat composé d'une première plaque et d'une deuxième plaque, chaque plaque étant réalisée à partir d'une tôle de métal emboutie comportant un bord périphérique contenu dans un plan et formant une zone de liaison, chaque plaque comportant un premier et un deuxième grands cotés et un premier et un second petits cotés, et comprenant au moins une paroi s'étendant depuis le bord périphérique perpendiculairement au plan contenant le bord périphérique.The invention therefore provides a heat exchanger omprenant at least a flat tube composed of a first plate and a second plate, each plate being made from a stamped metal sheet having a peripheral edge contained in a plane and forming a connecting zone, each plate having a first and a second large sides and a first and a second small sides, and comprising at least one wall extending from the peripheral edge perpendicular to the plane containing the peripheral edge.

Une telle paroi permet d'assurer une protection de la jonction entre deux plaques formant un tube d'échangeur de chaleur. En effet, lors de l'assemblage de deux plaques entre elles, la paroi d'une des plaques vient recouvrir la zone de jonction entre les plaques et ainsi isoler cette zone des éléments extérieurs, en particulier les gouttes d'eau, les particules métalliques, ...Such a wall makes it possible to protect the junction between two plates forming a heat exchanger tube. Indeed, during the assembly of two plates together, the wall of one of the plates comes to cover the junction zone between the plates and thus isolate this zone from the external elements, in particular the drops of water, the metal particles , ...

De même, une telle paroi permet de rigidifier la plaque en créant une nervure venant s'opposer au pliage éventuel de cette dernière. Elle présente un avantage tout particulier dans la réduction de la masse et des dimensions générales des échangeurs de chaleur par l'emploi de tôles métalliques d'épaisseurs plus faible pour le formage des plaques.In the same way, such a wall makes it possible to stiffen the plate by creating a rib coming to oppose the eventual folding of the latter. It has a particular advantage in reducing the mass and the overall dimensions of the heat exchangers by the use of metal sheets of smaller thicknesses for forming the plates.

La plaque comporte un premier et un deuxième grands cotés et un premier et un second petits cotés. Selon l'invention, la paroi s'étend sur toute la longueur du premier grand coté.The plate has a first and a second large sides and a first and second small sides. According to the invention, the wall extends over the entire length of the first large side.

Dans un mode de réalisation complémentaire de l'invention,la paroi est également agencée sur au moins une partie du premier et/ou du deuxième petit(s) coté (s).In a complementary embodiment of the invention, the wall is also arranged on at least a portion of the first and / or second small side (s).

La plaque présente un plan de symétrie perpendiculaire aux grands cotés.The plate has a plane of symmetry perpendicular to the long sides.

De préférence, la tôle de métal emboutie a une épaisseur inférieure ou égale à 0.35 mm.Preferably, the stamped metal sheet has a thickness less than or equal to 0.35 mm.

La première plaque et la deuxième plaque sont disposées de telle façon que le premier grand coté de la première plaque coopère avec le deuxième grand coté de la deuxième plaque.The first plate and the second plate are arranged in such a way that the first large side of the first plate cooperates with the second large side of the second plate.

D'autres caractéristiques et avantages de l'invention apparaîtront à l'examen de la description détaillée ci-après faite seulement à titre d'exemples de réalisation dépourvus de tout caractère limitatif. Dans cette description, on se réfère aux dessins annexés, sur lesquels :

  • la figure 1 est une vue de face d'un échangeur de chaleur constitué d'un empilement de plaques,
  • la figure 2 est une vue en perspective d'une plaque,
  • la figure 3 est une vue de détail de la partie supérieure d'une plaque de la figure 1,
  • la figure 4 est une vue de détail de la partie inférieure d'une plaque de la figure 1,
  • la figure 5 est une vue en coupe selon la section V-V de la figure 1 de l'échangeur de chaleur selon la présente invention,
  • la figure 5a est une vue de détail de la zone de jonction de tubes selon la présente invention,
  • la figure 6 est une vue de détail de la partie supérieure de l'échangeur de chaleur selon la présente invention,
  • la figure 7 est une vue en perspective d'une plaque et
  • la figure 8 est une vue en perspective d'une plaque de l'échangeur de chaleur selon l'invention.
Other characteristics and advantages of the invention will appear on examining the detailed description below. made only as exemplary embodiments devoid of any limiting character. In this description, reference is made to the accompanying drawings, in which:
  • the figure 1 is a front view of a heat exchanger consisting of a stack of plates,
  • the figure 2 is a perspective view of a plate,
  • the figure 3 is a detail view of the top of a plaque from the figure 1 ,
  • the figure 4 is a detail view of the lower part of a plate of the figure 1 ,
  • the figure 5 is a sectional view according to section VV of the figure 1 of the heat exchanger according to the present invention,
  • the figure 5a is a detail view of the tube junction zone according to the present invention,
  • the figure 6 is a detail view of the upper part of the heat exchanger according to the present invention,
  • the figure 7 is a perspective view of a plate and
  • the figure 8 is a perspective view of a plate of the heat exchanger according to the invention.

Les dessins annexés pourront non seulement servir à compléter l'invention, mais aussi contribuer à sa définition, le cas échéant.The attached drawings may not only serve to complete the invention, but also contribute to its definition, if any.

La figure 1 représente, vu en perspective, un échangeur de chaleur 1. L'échangeur de chaleur 1 est du type à plaques, comprenant un empilement de tubes plats 2, chacun étant constitué d'une paire de plaques 4 en regard réunies entre elles. Les plaques 4 assemblées définissent entre elles un passage 6 pour l'écoulement d'un fluide, en particulier un fluide réfrigérant d'une boucle de climatisation ou un fluide caloporteur d'une bouche de chauffage. Chaque plaque 4 comportant des ouvertures formant une entrée de fluide 8 pour introduire du fluide dans le passage 6 d'écoulement du fluide et une sortie de fluide 10 pour décharger le fluide à partir du passage 6 d'écoulement du fluide.The figure 1 represents, in perspective, a heat exchanger 1. The heat exchanger 1 is of the plate type, comprising a stack of flat tubes 2, each consisting of a pair of facing plates 4 joined together. The assembled plates 4 define between them a passage 6 for the flow a fluid, in particular a cooling fluid of an air conditioning loop or a heat transfer fluid of a heating mouth. Each plate 4 having openings forming a fluid inlet 8 for introducing fluid into the fluid flow passage 6 and a fluid outlet 10 for discharging the fluid from the fluid flow passage 6.

La plaque 4 comporte également une nervure 14 centrale sur la surface de sa paroi intérieure qui forment une saillie dans le passage 6 d'écoulement du fluide. La nervure 14 de la première plaque 4 formant le tube plat 2 est maintenue en contact avec la nervure 14 en regard de la deuxième plaque 4 formant le tube plat 2 afin de créer une séparation dans le passage 6 d'écoulement du fluide pour la circulation du fluide entre l'entrée de fluide 8 et la sortie de fluide 10 formant ainsi une circulation en 'U'.The plate 4 also comprises a central rib 14 on the surface of its inner wall which form a projection in the flow passage 6 of the fluid. The rib 14 of the first plate 4 forming the flat tube 2 is kept in contact with the rib 14 facing the second plate 4 forming the flat tube 2 in order to create a separation in the flow passage 6 of the fluid for circulation fluid between the fluid inlet 8 and the fluid outlet 10 thus forming a circulation 'U'.

De plus, la plaque 4 comprend une multitude de saillies 12 sur la surface de sa paroi intérieure qui forment des excroissances dans le passage 6 d'écoulement du fluide. Les saillies 12 de chacune des plaques 4 sont disposées en rangées qui s'étendent dans le sens du passage d'écoulement du fluide. De façon préférentielle, les saillies 12 d'une plaque 4 de chaque paire de plaques 4 sont maintenues en contact avec les nervures en regard de l'autre plaque 4.In addition, the plate 4 comprises a multitude of projections 12 on the surface of its inner wall which form protrusions in the flow passage 6 of the fluid. The projections 12 of each of the plates 4 are arranged in rows which extend in the direction of the flow passage of the fluid. Preferably, the projections 12 of a plate 4 of each pair of plates 4 are kept in contact with the ribs facing the other plate 4.

Selon une variante de réalisation, telle que représentée en figures 7 et 8, les plaques 4 ne comportent pas de saillies 12 et sont lisses.According to an alternative embodiment, as represented in figures 7 and 8 plates 4 do not have protrusions 12 and are smooth.

L'échangeur de chaleur 1 s'étend sur une hauteur H selon une direction z, une largeur L selon une direction x et une profondeur P selon une direction y. Les directions x, y et z forment une dièdre direct.The heat exchanger 1 extends over a height H in a z direction, a width L in a direction x and a depth P in a direction y. The directions x, y and z form a direct dihedron.

L'échangeur de chaleur 1 comprend une série de tubes plats 2 disposés en alternance sur la largeur L avec des intercalaires 16 selon la direction x.The heat exchanger 1 comprises a series of flat tubes 2 arranged alternately across the width L with tabs 16 in the x direction.

Les tubes plats 2 s'étendent sur la hauteur H. Sur une majeure partie de cette hauteur, les passages 6 des tubes plats 2 présentent une épaisseur sensiblement constante 'e' formée par l'intervalle entre deux plaques 4 d'une même paire.The flat tubes 2 extend over the height H. Over most of this height, the passages 6 of the flat tubes 2 have a substantially constant thickness 'e' formed by the gap between two plates 4 of the same pair.

L'échangeur de chaleur 1 comporte au niveau de l'entrée de fluide 8 et de la sortie de fluide 10 des renflements 18 d'une épaisseur supérieure à l'épaisseur 'e' des passages 6 des tubes plats 2. Le renflement 18 d'une plaque 4 forment avec le renflement 18 de la plaque 4 d'une même paire de plaques 4 un espace de circulation de fluide faisant fonction de collecteur d'entrée de fluide et de collecteur de sortie de fluide.The heat exchanger 1 comprises at the fluid inlet 8 and the fluid outlet 10 bulges 18 of a thickness greater than the thickness 'e' of the passages 6 of the flat tubes 2. The bulge 18 d a plate 4 form with the bulge 18 of the plate 4 of the same pair of plates 4 a fluid circulation space acting as a fluid inlet manifold and a fluid outlet manifold.

Chaque collecteur d'entrée d'une paire de plaques 4 est en contact avec le collecteur d'entrée d'une paire de plaques 4 voisine dans la direction x. De façon similaire, chaque collecteur de sortie d'une paire de plaques 4 est en contact avec le collecteur de sortie d'une paire de plaques 4 voisine dans la direction x. Un tel agencement permet de créer la circulation en passe dans l'échangeur de chaleur 1.Each input collector of a pair of plates 4 is in contact with the input collector of a pair of neighboring plates 4 in the x direction. Similarly, each output collector of a pair of plates 4 is in contact with the output collector of a pair of neighboring plates 4 in the x direction. Such an arrangement makes it possible to create the circulation passing through the heat exchanger 1.

L'empilement de tubes plats 2 crée, entre deux paires de plaques 4 voisines dans la direction x, un intervalle. Chacun de ces intervalles est garni d'un intercalaire 16 formé à partir d'une feuille mince ondulée conductrice de la chaleur, dont les crêtes sont en contact alternativement avec les deux plaques 4 des tubes plats 2 délimitant l'intervalle. De façon connue, un flux d'air 50, représenté sur la figure 5, peut circuler dans les intervalles agencés entre deux paires de plaques 4 voisines dans la direction x, à travers les intercalaires 16, pour échanger de la chaleur, avec le fluide circulant dans les passages 6 des tubes plats 2The stack of flat tubes 2 creates, between two pairs of adjacent plates 4 in the x direction, an interval. Each of these gaps is lined with an interlayer 16 formed from a heat conductive corrugated thin sheet, the ridges of which are in alternating contact with the two plates 4 of the flat tubes 2 delimiting the gap. In known manner, an air flow 50, represented on the figure 5 , can flow in the intervals arranged between two pairs of neighboring plates 4 in the x direction, through the inserts 16, for exchanging heat, with the fluid flowing in the passages 6 of the flat tubes 2

Un faisceau de l'échangeur de chaleur 1 est formé par l'empilement de tubes plats 2 en alternance avec les intercalaires 16. Le faisceau est terminé, dans la direction x, par deux plaques d'extrémité 20.A bundle of the heat exchanger 1 is formed by the stack of flat tubes 2 alternating with the spacers 16. The bundle is terminated, in the x direction, by two end plates 20.

L'ensemble constitué par les tubes plats 2, les intercalaires 16 et les plaques d'extrémités 20 est solidarisé afin de constituer un élément unitaire formant le faisceau de l'échangeur de chaleur 1. La solidarisation de l'ensemble est réalisé, par exemple, par brasage.The assembly constituted by the flat tubes 2, the spacers 16 and the end plates 20 is secured to form a unitary element forming the heat exchanger beam 1. The fastening of the assembly is carried out, for example by brazing.

La connexion de l'échangeur de chaleur 1 à un circuit de fluide auquel il est intégré se fait par des tuyaux 24, généralement en aluminium, débouchant respectivement dans le collecteur d'entrée et le collecteur de sortie de l'échangeur de chaleur 1. Les tuyaux 24 sont maintenus solidaire du faisceau de l'échangeur de chaleur 1, notamment par brasage. Les tuyaux 24 sont reliés au circuit de fluide par des organes de connexion 22.The connection of the heat exchanger 1 to a fluid circuit to which it is integrated is through pipes 24, generally made of aluminum, opening respectively into the inlet manifold and the outlet manifold of the heat exchanger 1. The pipes 24 are held integral with the beam of the heat exchanger 1, in particular by brazing. The pipes 24 are connected to the fluid circuit by connecting members 22.

On se réfère dorénavant aux figures 2 à 4 qui présentent une plaque 4 selon la présente invention.We now refer to Figures 2 to 4 which have a plate 4 according to the present invention.

Tous les tubes plats 2 sont identiques et sont constitués par deux plaques 4 réalisées à partir de tôle embouties en forme de cuvettes. La tôle formant la plaque 4 est d'une épaisseur 'th'. Il est particulièrement avantageux que l'épaisseur 'th' de la tôle formant la plaque 4 soit inférieure ou égale à 0.35 mm. Chaque plaque 4 est formée de deux grands cotés 26 s'étendant sur une hauteur H dans la direction z reliés par deux petits cotés 28 s'étendant sur une profondeur P dans la direction y.All flat tubes 2 are identical and consist of two plates 4 made from sheet metal stamped cups. The sheet forming the plate 4 is of a thickness 'th'. It is particularly advantageous that the thickness 'th' of the sheet forming the plate 4 is less than or equal to 0.35 mm. Each plate 4 is formed of two long sides 26 extending over a height H in the z direction connected by two small sides 28 extending over a depth P in the y direction.

Chaque plaque 4 comporte un bord périphérique 30 formant un contour de la plaque 4 s'étendant au niveau des grands cotés 26 dans la direction y et au niveau des petits cotés 28 dans la direction z. Le bord périphérique 30 est contenu dans un plan P.Each plate 4 has a peripheral edge 30 forming a contour of the plate 4 extending at the large sides 26 in the y direction and at the small sides 28 in the z direction. The peripheral edge 30 is contained in a plane P.

Le plan P est tel généralement parallèle au plan contenant la paroi intérieure de la plaque 4 et est distant de ce plan d'une distance sensiblement égale à la moitié de l'épaisseur 'e' des passages 6 des tubes plats 2. Le plan P contient le bord périphérique 30 de la plaque 4.The plane P is such generally parallel to the plane containing the inner wall of the plate 4 and is distant from this plane by a distance substantially equal to half the thickness 'e' of the passages 6 of the flat tubes 2. The plane P contains the peripheral edge 30 of the plate 4.

Lors de l'assemblage d'une première et d'une deuxième plaques 4 entre elles pour former un tube plat 2, le plan P de la première plaque 4 est confondu avec le plan P de la deuxième plaque 4.When assembling a first and a second plate 4 together to form a flat tube 2, the plane P of the first plate 4 coincides with the plane P of the second plate 4.

Chaque plaque 4 d'une même paire de plaques 4 sont réunies entre elles de façon étanche sur tout leur contour au niveau de leur bord périphérique 30 respectif pour définir passage 6 pour l'écoulement d'un fluide.Each plate 4 of the same pair of plates 4 are joined together tightly over their entire contour at their respective peripheral edge 30 to define passage 6 for the flow of a fluid.

La plaque 2 comporte également une paroi 40 s'étendant depuis le bord périphérique 30. La paroi 40 n'est pas contenue dans le plan P. La paroi 40 est perpendiculaire au plan P et s'étend dans la direction x à l'opposée de la paroi intérieure de la plaque 4.The plate 2 also comprises a wall 40 extending from the peripheral edge 30. The wall 40 is not contained in the plane P. The wall 40 is perpendicular to the plane P and extends in the x direction to the opposite of the inner wall of the plate 4.

La paroi 40 s'étend dans la direction x d'une hauteur 'f'. La hauteur 'f' est supérieure ou égale à l'épaisseur 'th' de la tôle de la plaque 4.The wall 40 extends in the x direction of a height 'f'. The height 'f' is greater than or equal to the thickness 'th' of the sheet of the plate 4.

La paroi 40 s'étend sur un des grands cotés 26 sur au moins une partie de la hauteur H de la plaque 4. De façon complémentaire et particulièrement avantageuse, la paroi 40 s'étend sur les petits cotés 28 sur une partie de la profondeur P de la plaque 4.The wall 40 extends over one of the long sides 26 over at least a portion of the height H of the plate 4. In a complementary and particularly advantageous manner, the wall 40 extends over the small sides 28 over part of the depth P of the plate 4.

De façon préférentielle, la paroi 40 s'étend sur toute la hauteur H de la plaque 4. De même, elle s'étend de façon particulièrement intéressante sur la moitié de la profondeur P de la plaque 4.Preferably, the wall 40 extends over the entire height H of the plate 4. Similarly, it extends particularly advantageously over half the depth P of the plate 4.

La paroi 40 est continue le long du bord périphérique 30 de la plaque 4.The wall 40 is continuous along the peripheral edge 30 of the plate 4.

Enfin, selon un autre mode de réalisation, la paroi 40 s'étend uniquement sur un des grands cotés 26 de la plaque 4.Finally, according to another embodiment, the wall 40 extends only on one of the long sides 26 of the plate 4.

Chacune des deux plaques 4 constituant le tube plat 4 comprend une paroi 40.Each of the two plates 4 constituting the flat tube 4 comprises a wall 40.

La figure 5 est une vue en coupe selon la section V-V de la figure 1 de l'échangeur de chaleur 1 et la figure 5a présente est une vue de détail de la zone de jonction de tubes d'un échangeur de chaleur 1.The figure 5 is a sectional view according to section VV of the figure 1 of the heat exchanger 1 and the figure 5a present is a detailed view of the tube junction zone of a heat exchanger 1.

Les tubes plats 2 sont constituées par l'assemblage de deux plaques 4 entre elles. Les plaques 4 sont réunies sur leur contour au niveau de leur bord périphérique 30 respectif afin de former une zone de liaison 42. Cette dernière s'étend sur tout le contour extérieur du tube plat 2.The flat tubes 2 are constituted by the assembly of two plates 4 between them. The plates 4 are joined on their contour at their respective peripheral edge 30 to form a connecting zone 42. The latter extends over the entire outer contour of the flat tube 2.

La zone de liaison 42 assure la fermeture étanche des tubes plats 2 et, plus particulièrement, des passages 6 de fluide vis-à-vis de l'extérieur. Notamment, la zone de liaison 42 constitue un interface étanche au flux d'air 50 pour le fluide circulant dans les tubes plats 2.The connection zone 42 ensures the tight closure of the flat tubes 2 and, more particularly, the passages 6 of fluid vis-à-vis the outside. In particular, the connecting zone 42 constitutes an impervious interface to the air flow 50 for the fluid flowing in the flat tubes 2.

Comme le montrent les figure 5 et 5a, la paroi 40 vient recouvrir la zone de liaison 42. Ainsi, la paroi 40 constitue une protection de la zone de liaison 42 vis-à-vis du flux d'air 50.As shown by Figure 5 and 5a the wall 40 covers the connecting zone 42. Thus, the wall 40 constitutes a protection of the connection zone 42 with respect to the air flow 50.

Le flux d'air 50 est chargé de particules, en particulier de l'eau ou de métal tel que du cuivre. La paroi 40 évite tout contact direct entre la zone de liaison 42 et le flux d'air 50. Les risques liés aux particules du flux d'air 50, notamment la corrosion, sont réduits. On diminue ainsi les risques de corrosion et donc les risques de fuite des tubes plats.The air stream 50 is charged with particles, in particular water or metal such as copper. The wall 40 avoids any direct contact between the connection zone 42 and the air flow 50. The risks associated with the particles of the air flow 50, in particular corrosion, are reduced. This reduces the risk of corrosion and therefore the risk of leakage of flat tubes.

De plus, la paroi 40 permet également d'améliorer la rigidité de la plaque 4. Ainsi, la paroi 40 constitue une nervure de rigidification de la plaque 4. Ceci est particulièrement avantageux dans la cadre de réduction de l'épaisseur de la plaque 4. La paroi 40 permet donc, une fois assemblée à une autre plaque 40, de définir un tube 2 particulièrement rigide. Cette propriété se répercute sur la tenue mécanique du faisceau de l'échangeur de chaleur 1 et contribue à la résistance mécanique de ce dernier.In addition, the wall 40 also makes it possible to improve the rigidity of the plate 4. Thus, the wall 40 constitutes a rib for stiffening the plate 4. This is particularly advantageous in the context of reducing the thickness of the plate 4 The wall 40 thus makes it possible, once assembled to another plate 40, to define a particularly rigid tube 2. This property affects the mechanical strength of the beam of the heat exchanger 1 and contributes to the mechanical strength of the latter.

La figure 6 est une vue de détail de la partie supérieure de l'échangeur de chaleur 1. Comme présentée sur la figure 6, chaque zone de liaison 42 d'une paire de plaques 4 est recouverte par la paroi 40. Ainsi, le flux d'air 50 vient en contact avec la paroi 40. La zone de liaison 42 est donc protégée du flux d"air.The figure 6 is a detail view of the top of the heat exchanger 1. As shown on the figure 6 each connecting zone 42 of a pair of plates 4 is covered by the wall 40. Thus, the air flow 50 comes into contact with the wall 40. The connection zone 42 is thus protected from the air flow.

Selon la présente invention, l'étanchéité de l'assemblage des tubes plats 4 est garantie.According to the present invention, the tightness of the assembly of the flat tubes 4 is guaranteed.

Tel que représenté en figures 7 et 8, la plaque 4 de l'échangeur selon l'invention comporte un plan de symétrie perpendiculaire aux grands cotés 26. De fait, la plaque 4 comporte, en complément des ouvertures formant l'entrée de fluide 8 et la sortie de fluide 10 disposées en partie supérieure de la plaque 4, des ouvertures en partie inférieure de la plaque 4 afin de réaliser la communication avec des paires de plaques voisines.As represented in figures 7 and 8 , the plate 4 of the exchanger according to the invention comprises a plane of symmetry perpendicular to the long sides 26. In fact, the plate 4 comprises, in addition to the openings forming the fluid inlet 8 and the fluid outlet 10 disposed in upper part of the plate 4, openings in the lower part of the plate 4 to achieve communication with neighboring pairs of plates.

La plaque 4 selon les figures 7 et 8 est de structure identique à la plaque 4 selon les figures 2-4. Elle se différencie par la présence deux série d'ouvertures 110, 120, 160 et 180 disposées aux deux extrémités de la plaque 4.Plate 4 according to figures 7 and 8 is identical in structure to the plate 4 according to the Figures 2-4 . It is distinguished by the presence of two series of openings 110, 120, 160 and 180 disposed at the two ends of the plate 4.

Ainsi, la plaque 4 de la figure 7 présente deux canaux 240 et 220 mettant en relation fluidique respectivement une première ouverture 110 d'une première extrémité de la plaque 4 avec une première ouverture 160 d'une deuxième extrémité de la plaque 4 et une deuxième ouverture 120 de la première extrémité de la plaque 4 avec une deuxième ouverture 180 de la deuxième extrémité de la plaque 4. Les canaux 220 et 240 sont séparés par une nervure 140 centrale.So the plate 4 of the figure 7 has two channels 240 and 220 fluidically connecting respectively a first opening 110 of a first end of the plate 4 with a first opening 160 of a second end of the plate 4 and a second opening 120 of the first end of the plate 4 with a second opening 180 of the second end of the plate 4. The channels 220 and 240 are separated by a rib 140 central.

Dans l'échangeur de chaleur selon l'invention, la plaque 4 est telle que le tube plat 2 est formé de deux plaques 4 identiques agencées tête-bêche. De fait, le canal 220 d'une première plaque 4 constituant le tube plat 2 fait face au canal 240 de la deuxième plaque 4 constituant le tube plat 2 et réciproquement. L'étanchéité entre les deux passages de fluides ainsi créés dans le tube 2 est réalisée la mise en contact des nervures 140 respectives des plaques 4 formant le tube plat 2.In the heat exchanger according to the invention, the plate 4 is such that the flat tube 2 is formed of two identical plates 4 arranged head to tail. In fact, the channel 220 of a first plate 4 constituting the flat tube 2 faces the channel 240 of the second plate 4 constituting the flat tube 2 and vice versa. The tightness between the two fluid passages thus created in the tube 2 is achieved by contacting the respective ribs 140 of the plates 4 forming the flat tube 2.

Ce mode de réalisation présente l'avantage additionnel de permettre la fabrication d'un seul modèle de plaques 4 qui seront utilisées pour la production de tubes plats 2 et d'échangeurs de chaleur 1. Elle présente donc un bénéfice important d'un point de vue de la standardisation et des cadences de production.This embodiment has the additional advantage of allowing the manufacture of a single model 4 plates that will be used for the production of flat tubes 2 and heat exchangers 1. It thus has a significant benefit from a point of view of standardization and production rates.

Cela permet donc de réduite les coûts de fabrication en produisant en masse la même plaque 4.This therefore reduces the manufacturing costs by mass producing the same plate 4.

Enfin, la figure 8 est une vue en perspective d'une plaque de l'échangeur de chaleur selon l'invention.Finally, figure 8 is a perspective view of a plate of the heat exchanger according to the invention.

Des encoches 210 sont ménagées dans la paroi 40 de la plaque 4. Selon l'exemple de la figure 8, la paroi 40 comprend deux encoches 210. Ce nombre est en rien limitatif.Notches 210 are formed in the wall 40 of the plate 4. According to the example of the figure 8 , the wall 40 comprises two notches 210. This number is in no way limiting.

En regard de chaque encoche 210, se trouvent des ergots 200 managées en vis-à-vis des encoches 210 par symétrie par rapport à un plan passant par la nervure 140 et perpendiculaire au plan général de la plaque 4.Opposite each notch 210, there are lugs 200 that are maneuvered opposite the notches 210 by symmetry with respect to a plane passing through the rib 140 and perpendicular to the general plane of the plate 4.

Lors de l'assemblage de deux plaques 4 pour former un tube 2, les encoches 210 d'une première plaque 4 viennent en coopération avec les ergots 200 de la deuxième plaque 4 et réciproquement afin de faciliter l'assemblage et la cohésion des plaques 4 entre elles.When assembling two plates 4 to form a tube 2, the notches 210 of a first plate 4 come into cooperation with the lugs 200 of the second plate 4 and vice versa in order to facilitate the assembly and cohesion of the plates 4 between them.

Les ergots 200 servent de pattes de sertissage et permettent de fermer le contour périphérique du tube plat 4.The lugs 200 serve as crimping tabs and make it possible to close the peripheral contour of the flat tube 4.

Le premier exemple de réalisation a été décrit avec des plaques formant des tubes ayant une circulation de fluide en 'U'. Le deuxième exemple de réalisation couvre les plaques pour tube plat formant une circulation en 'I'.The first exemplary embodiment has been described with tubes forming tubes having a U-shaped fluid circulation. The second embodiment covers the plates for flat tube forming an 'I' circulation.

Selon des alternatives de réalisation possibles des exemples décrits précédemment, il est possible d'insérer un intercalaire entre les plaques constitutives des tubes plats. Ces intercalaires sont disposés dans les passages de fluide. Cela est particulièrement adapté pour les tubes réalisés à partir de plaques selon le deuxième mode de réalisation selon les figures 7 et 8.According to possible alternative embodiments of the examples described above, it is possible to insert an interlayer between the constituent plates of the flat tubes. These spacers are arranged in the fluid passages. This is particularly suitable for tubes made from plates according to the second embodiment according to the figures 7 and 8 .

La présente invention trouve une application toute particulière dès lors que doit être développée un échangeur de chaleur, par exemple pour une installation de chauffage, ventilation et/ou climatisation destiné à des véhicules automobiles. Notamment, la présente invention est particulièrement adaptée aux échangeurs de chaleurs de type radiateurs de chauffage ou de refroidissement, aux évaporateurs, aux condenseurs ou refroidisseurs de gaz intégrés dans une installation de chauffage, ventilation et/ou climatisation d'un véhicule automobile.The present invention finds a particular application when a heat exchanger must be developed, for example for a heating, ventilation and / or air conditioning system for motor vehicles. In particular, the present invention is particularly suitable for heat exchangers such as heating or cooling radiators, evaporators, condensers or gas coolers integrated in a heating, ventilation and / or air conditioning system of a motor vehicle.

Bien évidemment, l'invention n'est pas limitée aux modes de réalisation décrits précédemment et fournis uniquement à titre d'exemple et englobe d'autres variantes que pourra envisager l'homme du métier dans le cadre des revendications.Of course, the invention is not limited to the embodiments described above and provided solely by way of example and encompasses other variants that may be considered by those skilled in the art within the scope of the claims.

Claims (3)

  1. Heat exchanger (1) comprising at least one flat tube (2) made up of a first plate (4) and of a second plate (4), each plate (4) being made from a chased metal sheet comprising a peripheral edge (30) contained within a plane (P) and forming a connecting zone (42), each plate (4) comprising a first and a second long side (26) and a first and a second short side (28) and comprising at least one wall (40) extending from the peripheral edge (30) perpendicular to the plane (P) containing the peripheral edge (30), the said wall covering the connecting zone (42), and in which each plate (4) has a plane of symmetry running perpendicular to the long sides,
    characterized in that the wall (40) is arranged over the entire length of the first long side (26),
    in that the chased metal sheet comprises at least one lug (200) and at least one slot (210) which are arranged on the peripheral edge (30) of the plate (4), and in that the first plate (4) and the second plate (4) are arranged in such a way that the first long side (26) of the first plate (4) engages with the second long side (26) of the second plate (4).
  2. Heat exchanger according to Claim 1, characterized in that the wall (4) is arranged over at least part of the first and/or of the second short side(s) (28).
  3. Heat exchanger according to one of the preceding claims, characterized in that the chased metal sheet has a thickness (th) less than or equal to 0.35 mm.
EP09155763.7A 2008-03-26 2009-03-20 Heat exchanger Active EP2105694B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0801633A FR2929390B1 (en) 2008-03-26 2008-03-26 HEAT EXCHANGER PLATE

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Publication Number Publication Date
EP2105694A1 EP2105694A1 (en) 2009-09-30
EP2105694B1 true EP2105694B1 (en) 2019-04-17

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EP09155763.7A Active EP2105694B1 (en) 2008-03-26 2009-03-20 Heat exchanger

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JP (1) JP5722528B2 (en)
FR (1) FR2929390B1 (en)

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FR2978538B1 (en) * 2011-07-25 2015-06-19 Valeo Systemes Thermiques HEAT EXCHANGER PLATE.
JP5891102B2 (en) * 2012-04-27 2016-03-22 株式会社ケーヒン・サーマル・テクノロジー Heat exchanger with heat storage function and manufacturing method thereof
FR2991035B1 (en) * 2012-05-22 2018-07-27 Valeo Systemes Thermiques HEAT EXCHANGER TUBE, HEAT EXCHANGER TUBE BEAM, HEAT EXCHANGER COMPRISING SUCH BEAM AND METHOD OF MANUFACTURING PLATE OF HEAT EXCHANGER TUBE
JP6107017B2 (en) * 2012-09-18 2017-04-05 ダイキン工業株式会社 Heat exchanger and method of manufacturing heat exchanger
US9453690B2 (en) 2012-10-31 2016-09-27 Dana Canada Corporation Stacked-plate heat exchanger with single plate design
CN104729330A (en) * 2013-12-18 2015-06-24 四平维克斯换热设备有限公司 Built-in lamella heat exchanger of welding plate
FR3060105A1 (en) * 2016-12-12 2018-06-15 Valeo Systemes Thermiques THERMAL EXCHANGER, IN PARTICULAR EVAPORATOR, OF THE TYPE OF PLATES HAVING MECHANICAL REINFORCING MEANS
TWI662402B (en) * 2018-06-06 2019-06-11 酷碼科技股份有限公司 Cooling system and water-cooling radiator
CN210426171U (en) * 2019-06-03 2020-04-28 浙江盾安热工科技有限公司 Flat pipe and heat exchanger

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FR2814538A1 (en) * 2000-09-22 2002-03-29 Denso Corp Heat exchanger for gas fired water heating system, has multi-layer pipes arranged in stages with heat conducting fins and condensate guides between them

Also Published As

Publication number Publication date
JP5722528B2 (en) 2015-05-20
FR2929390A1 (en) 2009-10-02
FR2929390B1 (en) 2014-10-10
EP2105694A1 (en) 2009-09-30
JP2009257739A (en) 2009-11-05
US20090242182A1 (en) 2009-10-01

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