EP0622602A2 - Radiator of an automotive vehicle and method of manufacturing - Google Patents

Radiator of an automotive vehicle and method of manufacturing Download PDF

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Publication number
EP0622602A2
EP0622602A2 EP94400894A EP94400894A EP0622602A2 EP 0622602 A2 EP0622602 A2 EP 0622602A2 EP 94400894 A EP94400894 A EP 94400894A EP 94400894 A EP94400894 A EP 94400894A EP 0622602 A2 EP0622602 A2 EP 0622602A2
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EP
European Patent Office
Prior art keywords
plates
radiator
projections
boxes
manufacturing
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.)
Granted
Application number
EP94400894A
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German (de)
French (fr)
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EP0622602B1 (en
EP0622602A3 (en
Inventor
Jean-Claude Deronzier
Stéphane Pitruzzella
Hervé Damotte
Jean-Claude Vera
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ECIA Equipements et Composants pour lIndustrie Automobile SA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
ECIA Equipements et Composants pour lIndustrie Automobile SA
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Publication of EP0622602A2 publication Critical patent/EP0622602A2/en
Publication of EP0622602A3 publication Critical patent/EP0622602A3/en
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Publication of EP0622602B1 publication Critical patent/EP0622602B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/065—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing plate-like or laminated 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
    • 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
    • F28D1/0316—Assemblies of conduits in parallel
    • 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

Definitions

  • the invention relates to an automobile radiator and to a possible method of manufacturing certain elements constituting the heat exchange surface.
  • the heat transfer fluid of automobile engines is generally a liquid composed of water mixed with glycol or another antifreeze.
  • the heat which it absorbs is evacuated by the exchange surface of a radiator exposed to the ambient air, which constitutes the refrigerating fluid, and in which the water flows between a distribution water box and a box collection water.
  • This exchange surface is mainly composed, in most cases, of metallic copper or aluminum tubes parallel to very flat oval, circular or rectangular section which are connected by their ends to water boxes generally made of material polymeric; the cooling air circulates between the tubes thanks to the speed of the automobile or, failing this, to a fan.
  • the intervals between the tubes are occupied by corrugated sheets of metal intended to increase the heat exchange surface: they are connected to the tubes by solders established at the tops of the corrugations.
  • the known radiator fragment of FIG. 1 is formed from tubes 1 of very flat rectangular section of which portions of the two faces or main plates 2 have been illustrated for two of them.
  • Water to cool circulates in the tubes 1, in the direction of the arrow L, along channels 4.
  • the spaces between the tubes 1, appreciably wider than the channels 4, are occupied by corrugated sheets 5 united to the flat plates 2, to the tops corrugations, by brazing 6.
  • the fins of the sheets 5 have undergone a stamping which has formed lamellas 7, whose shape is similar to the shutters of the shutters, to increase the turbulence of the air which circulates parallel to the fins, c '' i.e. perpendicular to the liquid, according to arrow G.
  • thermosetting materials are also suitable.
  • radiator plates A fairly different design of radiator plates is described in European patent application 0 397 487.
  • the plates are made of polymer and hollowed out with channels of very irregular section, formed of oblique and intersecting channel sections, to increase the turbulence of the heat transfer liquid. , but the plates are in principle smooth on the outside and no one takes care of the flow of the coolant. It is not believed that the heat exchange efficiency is as good as in the invention, and the pressure drop undergone by the heat transfer liquid is much increased.
  • the radiator object of the invention essentially composed of hollow parallel plates of polymeric material in which circulates in smooth channels the liquid coolant and between which circulates a gaseous refrigerant such as air, is further characterized in that the plates have faces exposed to the refrigerant provided with linear projections and perpendicular to the circulation of the fluid.
  • projections have the technical function of increasing the heat exchange surface and of creating turbulence in the refrigerant flow by varying the section of the intervals or of the channels which it crosses.
  • the heat exchange surface element of the radiator can be made from injection molded half-plates, by welding the half-plates together to form the flow channels for the heat transfer fluid.
  • the plates can be manufactured in one piece by a continuous extrusion process, and the projections therefore extend along the axis of the tubes: an extrusion process will then be used.
  • the radiator is composed, in addition to the plates, of heat transfer fluid boxes, each of which comprises an openwork face of recesses in each of which a respective end of one of the plates is engaged.
  • This construction is indeed compatible with boxes made of polymeric material as well.
  • the boxes can be joined to the plates by gluing or welding. They may also include, with the same concern for simplicity, an envelope of semi-cylindrical shape or the like connected and united to the perforated face by the same means.
  • FIG. 2 An overall radiator 10 according to the invention is illustrated in FIG. 2. It comprises two water boxes, one for distribution 11 and one for collection 12, located one above the other. Each of water boxes 11 and 12 is formed by a perforated plate 13 and a casing 14.
  • the casing 14 may be semi-cylindrical, its end generators are joined to the perforated plate 13 by welding or bonding and its opposite portion is pierced and joined to a tube 15.
  • a flexible pipe, not shown, is connected to the pipes 15 for transporting the water from the engine cooling circuit into the distribution water box 11 and withdrawing it from the collecting water tank 12.
  • the plates 9 of the invention extend between the perforated plates 13, through which their ends are engaged and welded or glued to reach the water boxes 11 and 12, as shown in Figure 4.
  • the ambient air reaches the radiator 10 through its front face, passes through it by flowing between the tubes 9, thus cooling the water, which is distributed in the plates 9 by flowing between the water boxes 11 and 12.
  • the radiator 10 is placed at the front of the automobile, behind the grille and in front of the engine. As this location is conventional, we are content to symbolize the automobile seen from the front by the frame A.
  • the water boxes 11 and 12 and the plates 9 are all made of polymeric material.
  • the plates 9 can be formed as in the known embodiment of two main faces 16 all parallel to each other and joined by much shorter faces 17; a joint surface 18 cuts the short faces 17 if the plates 15 are produced by injection molding into two parts or half-plates, each of which is composed of one of the main faces 16 and of one half of the short faces 17 then by the welding or bonding of these half-plates to the joint surface 18.
  • the plate 9 has a section uniform, it is however possible and more advantageous to manufacture it by continuous extrusion.
  • the plate 9 is then produced in half-plates as before or, which will probably be preferred, from a part with a similar shape, except that there is no longer a joint surface 18.
  • the volume included in the plate 9, which constitutes the channel 21 in which the water flows, can be divided into parallel channels separated by longitudinal ribs 25 whose function is to better guide the water.
  • These longitudinal ribs 25 are produced by extrusion or assembled to the plates 9 by gluing or welding as the case may be. It is also preferred that the channel 21 is smooth, that is to say of uniform section from one end to the other of the plate 9, again so as not to create a pressure drop.
  • the main faces 16 are provided with linear projections 19, which we see here in section and which are perpendicular to the direction G of the air flow.
  • Their section can be semi-cylindrical and joined to the main face 16 by a diameter.
  • the linear projections 19 vary the section of the channels 20 and make the air flow turbulent; the stirring thus caused increases the licking of the main faces 16 by air and improves the extraction of heat.
  • the linear projections 19 are continuous over the entire free length of the plates 9, that is to say between the perforated plates 13, but do not extend over the portions of the plates 9 engaged in the perforated plates 13 If the manufacturing process, extrusion for example, requires extending them on these portions, they are then leveled.
  • the coefficients of improvement of the heat transfer between the air and the wall of the plates 9 were generally between 1.25 and 3 for increases in relative pressure loss between 3 and 8.
  • the values of the h / e ratio were between 0.01 and 0.5, the w / h ratio was between 5 and 100.
  • the adjacent main faces 16 are offset from each other by a half-step, that is to say that the linear projections 19 project at mid-distance from the linear projections 19 of the neighboring main plate 16.
  • FIG. 5a shows for the record a linear projection 19a with semi-circular section supported on a side plate 16 by its diameter, as in FIG. 3; a square section projection 19b is shown in Figure 5b; a triangular section projection 19c, supported on the side plate 16 by one side, is shown in Figure 5c, and a rectangular section projection 19d is shown in Figure 5d; conversely, another projection with a triangular section 19e, supported on the main plate 16 by an angle and shown in FIG. 5e, on a projection with an almost circular section 19f and shown in FIG. 5f, can also be chosen.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Exchange surface element for a motor-vehicle radiator, comprising a set of plates (9) made of a polymeric material inside which the heat-transfer fluid (water) circulates, the lateral faces (16) of the plates, between which the refrigerant (air) circulates, being provided with projections (19) in relief. These projections are oriented in the flow direction (L) of the heat-transfer fluid and are placed perpendicular to the flow direction (G) of the refrigerant. <IMAGE>

Description

L'invention concerne un radiateur d'automobile et un procédé de fabrication possible de certains éléments constituant la surface d'échange de chaleur.The invention relates to an automobile radiator and to a possible method of manufacturing certain elements constituting the heat exchange surface.

Le fluide caloporteur des moteurs d'automobiles est généralement un liquide composé d'eau mélangée à du glycol ou à un autre antigel. La chaleur qu'il absorbe est évacuée par la surface d'échange d'un radiateur exposé à l'air ambiant, qui constitue le fluide réfrigérant, et dans lequel l'eau s'écoule entre une boîte à eau de distribution et une boîte à eau de collecte. Cette surface d'échange est composée pour l'essentiel, dans la plupart des cas, de tubes métalliques de cuivre ou d'aluminium parallèles à section ovale, circulaire ou rectangulaire très plate qui sont raccordés par leurs extrémités aux boîtes à eau généralement en matériau polymérique ; l'air de refroidissement circule entre les tubes grâce à la vitesse de l'automobile ou, à défaut, à un ventilateur. Or les intervalles entre les tubes sont occupés par des feuilles ondulées de métal destinées à augmenter la surface d'échange de chaleur : elles sont reliées aux tubes par des brasures établies aux sommets des ondulations. Mais les difficultés technologiques sont importantes pour contrôler la qualité des brasures sur des feuilles aussi minces (110 µm par exemple), et on a pu observer des défauts de contact entre feuilles et tubes qui nuisaient à la conduction de la chaleur et donc à l'efficacité du radiateur.The heat transfer fluid of automobile engines is generally a liquid composed of water mixed with glycol or another antifreeze. The heat which it absorbs is evacuated by the exchange surface of a radiator exposed to the ambient air, which constitutes the refrigerating fluid, and in which the water flows between a distribution water box and a box collection water. This exchange surface is mainly composed, in most cases, of metallic copper or aluminum tubes parallel to very flat oval, circular or rectangular section which are connected by their ends to water boxes generally made of material polymeric; the cooling air circulates between the tubes thanks to the speed of the automobile or, failing this, to a fan. However, the intervals between the tubes are occupied by corrugated sheets of metal intended to increase the heat exchange surface: they are connected to the tubes by solders established at the tops of the corrugations. However, there are significant technological difficulties in controlling the quality of the solder on such thin sheets (110 μm for example), and contact defects between sheets and tubes have been observed which adversely affect the conduction of heat and therefore the radiator efficiency.

Le fragment de radiateur connu de la figure 1 est formé de tubes 1 à section rectangulaire très plate dont on a illustré des portions des deux faces ou plaques principales 2 pour deux d'entre eux. L'eau à refroidir circule dans les tubes 1, en direction de la flèche L, le long de canaux 4. Les espaces entre les tubes 1, sensiblement plus larges que les canaux 4, sont occupés par des feuilles ondulées 5 unies aux plaques planes 2, aux sommets des ondulations, par des brasures 6. Les ailettes des feuilles 5 ont subi un emboutissage qui y a formé des lamelles 7, dont la forme est semblable aux persiennes des volets, pour accroître la turbulence de l'air qui circule parallèlement aux ailettes, c'est-à-dire perpendiculairement au liquide, selon la flèche G.The known radiator fragment of FIG. 1 is formed from tubes 1 of very flat rectangular section of which portions of the two faces or main plates 2 have been illustrated for two of them. Water to cool circulates in the tubes 1, in the direction of the arrow L, along channels 4. The spaces between the tubes 1, appreciably wider than the channels 4, are occupied by corrugated sheets 5 united to the flat plates 2, to the tops corrugations, by brazing 6. The fins of the sheets 5 have undergone a stamping which has formed lamellas 7, whose shape is similar to the shutters of the shutters, to increase the turbulence of the air which circulates parallel to the fins, c '' i.e. perpendicular to the liquid, according to arrow G.

L'inconvénient de devoir contrôler les brasures 6 ainsi que l'intérêt de plus en plus grand de construire les radiateurs en matière polymérique, pour limiter leur corrosion soit par le liquide caloporteur soit par le sel souvent projeté sur les routes en hiver, pour limiter leur coût et pour alléger substantiellement les véhicules, sont les raisons principales à la source de l'invention. On constatera en effet que certaines réalisations de l'invention peuvent être avantageusement fabriquées par des techniques associées aux matières polymériques thermoplastiques, bien qu'il ne soit pas acceptable de la limiter à ces matériaux, car son avantage essentiel est de parvenir à une bonne efficacité de refroidissement à l'aide d'une structure simple : des matières thermodurcissables sont également convenables.The disadvantage of having to control the solderings 6 as well as the growing interest in building the radiators in polymeric material, to limit their corrosion either by the heat transfer liquid or by the salt often projected on the roads in winter, to limit their cost and to lighten the vehicles substantially, are the main reasons behind the invention. It will indeed be seen that certain embodiments of the invention can advantageously be manufactured by techniques associated with thermoplastic polymeric materials, although it is not acceptable to limit it to these materials, since its essential advantage is to achieve good efficiency. cooling using a simple structure: thermosetting materials are also suitable.

Une conception assez différente de plaques de radiateur est décrite dans la demande de brevet européen 0 397 487. Les plaques sont en polymère et creusées de canaux à section très irrégulière, formés de tronçons de canal obliques et entrecroisés, pour accroître la turbulence du liquide caloporteur, mais les plaques sont en principe lisses à l'extérieur et on ne s'occupe pas de l'écoulement du fluide réfrigérant. On ne croit pas que l'efficacité d'échange de chaleur soit aussi bonne que dans l'invention, et la perte de charge subie par le liquide caloporteur est beaucoup accrue.A fairly different design of radiator plates is described in European patent application 0 397 487. The plates are made of polymer and hollowed out with channels of very irregular section, formed of oblique and intersecting channel sections, to increase the turbulence of the heat transfer liquid. , but the plates are in principle smooth on the outside and no one takes care of the flow of the coolant. It is not believed that the heat exchange efficiency is as good as in the invention, and the pressure drop undergone by the heat transfer liquid is much increased.

Le radiateur objet de l'invention, composé essentiellement de plaques parallèles creuses en matériau polymérique dans lesquelles circule dans des canaux lisses le fluide caloporteur liquide et entre lesquelles circule un fluide réfrigérant gazeux tel que l'air, est en outre caractérisé en ce que les plaques ont des faces exposées au fluide réfrigérant pourvues de saillies linéaires et perpendiculaires à la circulation du fluide.The radiator object of the invention, essentially composed of hollow parallel plates of polymeric material in which circulates in smooth channels the liquid coolant and between which circulates a gaseous refrigerant such as air, is further characterized in that the plates have faces exposed to the refrigerant provided with linear projections and perpendicular to the circulation of the fluid.

Ces saillies ont la fonction technique d'accroître la surface d'échange de chaleur et de créer des turbulences du flux réfrigérant en faisant varier la section des intervalles ou des canaux qu'il traverse.These projections have the technical function of increasing the heat exchange surface and of creating turbulence in the refrigerant flow by varying the section of the intervals or of the channels which it crosses.

Certains exemples et des règles dimensionnelles seront proposés plus loin, mais il n'est pas nécessaire que les variations de section, dues à la taille des saillies, soient importantes car leur nombre peut aussi jouer un rôle important.Some examples and dimensional rules will be proposed later, but it is not necessary that the section variations, due to the size of the protrusions, be significant because their number can also play an important role.

Il est aussi favorable que les saillies de plaques voisines, orientées les unes vers les autres des deux côtés d'un même canal d'écoulement d'air, aient des projections perpendiculairement aux plaques qui soient différentes.It is also favorable that the projections of neighboring plates, oriented towards one another on two sides of the same air flow channel, have projections perpendicular to the plates which are different.

L'élément de surface d'échange de chaleur du radiateur peut être fabriqué à partir de demi-plaques moulées par injection, en soudant les demi-plaques entre elles pour constituer les canaux d'écoulement du fluide caloporteur. Dans le cas où les saillies linéaires sont continues et parallèles aux canaux d'écoulement, les plaques peuvent être fabriquées d'une pièce par un procédé d'extrusion en continu, et les saillies s'étendent donc dans l'axe des tubes : on recourra alors à un procédé d'extrusion.The heat exchange surface element of the radiator can be made from injection molded half-plates, by welding the half-plates together to form the flow channels for the heat transfer fluid. In the case where the linear projections are continuous and parallel to the flow channels, the plates can be manufactured in one piece by a continuous extrusion process, and the projections therefore extend along the axis of the tubes: an extrusion process will then be used.

Dans tous les cas, une construction simple et économique du radiateur est obtenue s'il est composé, outre des plaques, de boîtes à fluide caloporteur dont chacune comprend une face ajourée d'évidements dans chacun desquels une extrémité respective d'une des plaques est engagée. Cette construction est en effet compatible avec des boîtes en matériau polymérique également. Les boîtes peuvent être unies aux plaques par des collages ou des soudures. Elles peuvent encore comporter, avec le même souci de simplicité, une enveloppe de forme semi-cylindrique ou analogue raccordée et unie à la face ajourée par les mêmes moyens.In all cases, a simple and economical construction of the radiator is obtained if it is composed, in addition to the plates, of heat transfer fluid boxes, each of which comprises an openwork face of recesses in each of which a respective end of one of the plates is engaged. This construction is indeed compatible with boxes made of polymeric material as well. The boxes can be joined to the plates by gluing or welding. They may also include, with the same concern for simplicity, an envelope of semi-cylindrical shape or the like connected and united to the perforated face by the same means.

On va maintenant décrire l'invention plus en détail à l'aide des figures suivantes annexées à titre illustratif et non limitatif :

  • la figure 1 est une vue d'une surface d'échange de chaleur de l'art antérieur,
  • la figure 2 est une vue d'ensemble de l'invention,
  • la figure 3 est une vue de détail d'une réalisation de l'invention en coupe à travers les plaques, les saillies étant longitudinales et continues,
  • la figure 4 illustre le raccordement des plaques aux boîtes à eau, et
  • les figures 5a à 5f illustrent six formes de saillies latérales.
The invention will now be described in more detail with the aid of the following figures, which are given by way of illustration and not limitation:
  • FIG. 1 is a view of a heat exchange surface of the prior art,
  • FIG. 2 is an overview of the invention,
  • FIG. 3 is a detailed view of an embodiment of the invention in section through the plates, the projections being longitudinal and continuous,
  • FIG. 4 illustrates the connection of the plates to the water boxes, and
  • Figures 5a to 5f illustrate six forms of lateral projections.

On a illustré globalement un radiateur 10 conforme à l'invention à la figure 2. Il comporte deux boîtes à eau, une de distribution 11 et une de collecte 12, situées l'une au-dessus de l'autre. Chacune des boîtes à eau 11 et 12 est formée d'une plaque ajourée 13 et d'une enveloppe 14. L'enveloppe 14 peut être semi-cylindrique, ses génératrices d'extrémités sont jointes à la plaque ajourée 13 par un soudage ou un collage et sa portion opposée est percée et jointe à une tubulure 15 . Une canalisation souple non représentée est raccordée aux tubulures 15 pour transporter l'eau du circuit de refroidissement du moteur dans la boîte à eau de distribution 11 et la retirer de celle de collecte 12. Les plaques 9 de l'invention s'étendent entre les plaques ajourées 13, à travers lesquelles leurs extrémités sont engagées et soudées ou collées pour atteindre les boîtes à eau 11 et 12, comme la figure 4 l'illustre. Comme le montre la flèche G, l'air ambiant atteint le radiateur 10 par sa face avant, le traverse en s'écoulant entre les tubes 9, refroidissant ainsi l'eau, qui se répartit dans les plaques 9 en s'écoulant entre les boîtes à eau 11 et 12. Le radiateur 10 est placé à l'avant de l'automobile, derrière la calandre et devant le moteur. Comme cet emplacement est classique, on s'est contenté de symboliser l'automobile vue de l'avant par le cadre A. Les boîtes à eau 11 et 12 et les plaques 9 sont toutes en matériau polymérique.An overall radiator 10 according to the invention is illustrated in FIG. 2. It comprises two water boxes, one for distribution 11 and one for collection 12, located one above the other. Each of water boxes 11 and 12 is formed by a perforated plate 13 and a casing 14. The casing 14 may be semi-cylindrical, its end generators are joined to the perforated plate 13 by welding or bonding and its opposite portion is pierced and joined to a tube 15. A flexible pipe, not shown, is connected to the pipes 15 for transporting the water from the engine cooling circuit into the distribution water box 11 and withdrawing it from the collecting water tank 12. The plates 9 of the invention extend between the perforated plates 13, through which their ends are engaged and welded or glued to reach the water boxes 11 and 12, as shown in Figure 4. As shown by arrow G, the ambient air reaches the radiator 10 through its front face, passes through it by flowing between the tubes 9, thus cooling the water, which is distributed in the plates 9 by flowing between the water boxes 11 and 12. The radiator 10 is placed at the front of the automobile, behind the grille and in front of the engine. As this location is conventional, we are content to symbolize the automobile seen from the front by the frame A. The water boxes 11 and 12 and the plates 9 are all made of polymeric material.

On voit à la figure 3 que les plaques 9 peuvent être formées comme dans la réalisation connue de deux faces principales 16 toutes parallèles entre elles et jointes par des faces beaucoup plus courtes 17 ; une surface de joint 18 coupe les faces courtes 17 si les plaques 15 sont produites par moulage-injection en deux parties ou demi-plaques dont chacune est composée d'une des faces principales 16 et d'une moitié des faces courtes 17 puis par le soudage ou le collage de ces demi-plaques à la surface de joint 18. Dans certaines réalisations où la plaque 9 a une section uniforme, il est cependant possible et plus avantageux de la fabriquer par extrusion continue. La plaque 9 est alors produite en demi-plaques comme précédemment ou, ce qui sera probablement préféré, d'une pièce à une forme semblable, sauf qu'il n'y a plus de surface de joint 18. Le volume inclus dans la plaque 9, qui constitue le canal 21 dans lequel l'eau coule, peut être divisé en canaux parallèles séparés par des nervures longitudinales 25 dont la fonction est de mieux guider l'eau. Ces nervures longitudinales 25 sont produites à l'extrusion ou assemblées aux plaques 9 par collage ou soudage selon le cas. On préfère aussi que le canal 21 soit lisse, c'est-à-dire à section uniforme d'un bout à l'autre de la plaque 9, encore pour ne pas créer de perte de charge.We see in Figure 3 that the plates 9 can be formed as in the known embodiment of two main faces 16 all parallel to each other and joined by much shorter faces 17; a joint surface 18 cuts the short faces 17 if the plates 15 are produced by injection molding into two parts or half-plates, each of which is composed of one of the main faces 16 and of one half of the short faces 17 then by the welding or bonding of these half-plates to the joint surface 18. In certain embodiments where the plate 9 has a section uniform, it is however possible and more advantageous to manufacture it by continuous extrusion. The plate 9 is then produced in half-plates as before or, which will probably be preferred, from a part with a similar shape, except that there is no longer a joint surface 18. The volume included in the plate 9, which constitutes the channel 21 in which the water flows, can be divided into parallel channels separated by longitudinal ribs 25 whose function is to better guide the water. These longitudinal ribs 25 are produced by extrusion or assembled to the plates 9 by gluing or welding as the case may be. It is also preferred that the channel 21 is smooth, that is to say of uniform section from one end to the other of the plate 9, again so as not to create a pressure drop.

Les faces principales 16 sont pourvues de saillies linéaires 19, qu'on voit ici en coupe et qui sont perpendiculaire à la direction G de l'écoulement de l'air. Leur section peut être semi-cylindrique et jointe à la face principale 16 par un diamètre. On définit par p leur pas d'espacement le long des faces principales 16 par h leur hauteur, c'est-à-dire ici leur rayon, et par e la largeur du canal 20 de passage de l'air entre deux faces principales 16 consécutives. Les saillies linéaires 19 font varier la section des canaux 20 et rendent l'écoulement d'air turbulent ; le brassage ainsi provoquée accroît le léchage des faces principales 16 par l'air et améliore l'extraction de la chaleur. Dans cette réalisation, les saillies linéaires 19 sont continues sur toute la longueur libre des plaques 9, c'est-à-dire entre les plaques ajourées 13, mais ne s'étendent pas sur les portions des plaques 9 engagées dans les plaques ajourées 13. Si le procédé de fabrication, l'extrusion par exemple, impose de les prolonger sur ces portions, elles sont ensuite arasées.The main faces 16 are provided with linear projections 19, which we see here in section and which are perpendicular to the direction G of the air flow. Their section can be semi-cylindrical and joined to the main face 16 by a diameter. We define by p their spacing pitch along the main faces 16 by h their height, that is to say here their radius, and by e the width of the air passage channel 20 between two main faces 16 consecutive. The linear projections 19 vary the section of the channels 20 and make the air flow turbulent; the stirring thus caused increases the licking of the main faces 16 by air and improves the extraction of heat. In this embodiment, the linear projections 19 are continuous over the entire free length of the plates 9, that is to say between the perforated plates 13, but do not extend over the portions of the plates 9 engaged in the perforated plates 13 If the manufacturing process, extrusion for example, requires extending them on these portions, they are then leveled.

Les coefficients d'amélioration du transfert thermique entre l'air et la paroi des plaques 9 ont été généralement compris entre 1,25 et 3 pour des augmentations de perte de pression relative comprises entre 3 et 8. Les valeurs du rapport h/e étaient comprises entre 0,01 et 0,5, le rapport p/h était compris entre 5 et 100.The coefficients of improvement of the heat transfer between the air and the wall of the plates 9 were generally between 1.25 and 3 for increases in relative pressure loss between 3 and 8. The values of the h / e ratio were between 0.01 and 0.5, the w / h ratio was between 5 and 100.

Les faces principales 16 adjacentes sont décalées entre elles d'un demi-pas, c'est-à-dire que les saillies linéaires 19 se projettent à mi-distance des saillies linéaires 19 de la plaque principale 16 voisine.The adjacent main faces 16 are offset from each other by a half-step, that is to say that the linear projections 19 project at mid-distance from the linear projections 19 of the neighboring main plate 16.

Certaines sections de saillies linéaires 19 sont illustrées sur les figures 5 : la figure 5a représente pour mémoire une saillie linéaire 19a à section semi-circulaire appuyée sur une plaque latérale 16 par son diamètre, comme sur la figure 3 ; une saillie à section carrée 19b est représentée à la figure 5b ; une saillie à section triangulaire 19c, appuyée sur la plaque latérale 16 par un côté, est représentée à la figure 5c, et une saillie à section rectangulaire 19d est représentée à la figure 5d ; inversement, une autre saillie à section triangulaire 19e, appuyée sur la plaque principale 16 par un angle et représentée à la figure 5e, sur une saillie à section presque circulaire 19f et représentée à la figure 5f, peuvent aussi être choisies.Certain sections of linear projections 19 are illustrated in FIGS. 5: FIG. 5a shows for the record a linear projection 19a with semi-circular section supported on a side plate 16 by its diameter, as in FIG. 3; a square section projection 19b is shown in Figure 5b; a triangular section projection 19c, supported on the side plate 16 by one side, is shown in Figure 5c, and a rectangular section projection 19d is shown in Figure 5d; conversely, another projection with a triangular section 19e, supported on the main plate 16 by an angle and shown in FIG. 5e, on a projection with an almost circular section 19f and shown in FIG. 5f, can also be chosen.

Claims (10)

Radiateur d'automobile composé essentiellement de plaques parallèles (9) en matériau polymérique dans lesquelles circule dans des canaux lisses (21) un fluide caloporteur liquide et entre lesquelles circule un fluide réfrigérant gazeux, caractérisé en ce que les plaques (9) ont des faces exposées au fluide réfrigérant (G) pourvues de saillies linéaires (19) et perpendiculaires à la circulation du gaz.Automobile radiator essentially composed of parallel plates (9) of polymeric material in which circulates in smooth channels (21) a liquid heat transfer fluid and between which circulates a gaseous refrigerant, characterized in that the plates (9) have faces exposed to the refrigerant (G) provided with linear projections (19) and perpendicular to the gas flow. Radiateur suivant la revendication 1, caractérisé en ce que les saillies linéaires sont continues (19).Radiator according to claim 1, characterized in that the linear projections are continuous (19). Radiateur suivant l'une quelconque des revendications 1 ou 2, caractérisé en ce que les saillies linéaires de deux plaques voisines ont des projections différentes perpendiculairement aux plaques.Radiator according to any one of claims 1 or 2, characterized in that the linear projections of two adjacent plates have different projections perpendicular to the plates. Radiateur suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que les saillies ont une hauteur (e), rapportée à une largeur (h) séparant des plaques (9) consécutives, comprise entre 0,01 et 0,5.Radiator according to any one of claims 1 to 3, characterized in that the projections have a height (e), relative to a width (h) separating consecutive plates (9), between 0.01 and 0.5. Radiateur suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que les saillies ont un pas (p) en direction de l'écoulement du fluide réfrigérant, rapporté à leur hauteur (h), compris entre 5 et 100.Radiator according to any one of Claims 1 to 4, characterized in that the projections have a pitch (p) in the direction of the flow of the coolant, relative to their height (h), of between 5 and 100. Procédé de fabrication de plaques de radiateur suivant la revendication 2 par un procédé d'extrusion.A method of manufacturing radiator plates according to claim 2 by an extrusion method. Procédé de fabrication de plaques de radiateur suivant l'une quelconque des revendications 1 à 5 par un procédé de moulage-injection.A method of manufacturing radiator plates according to any one of claims 1 to 5 by an injection molding method. Procédé de fabrication de plaques de radiateur suivant l'une quelconque des revendications 6 ou 7, les plaques étant constituées de deux demi-plaques assemblées par soudage ou collage.A method of manufacturing radiator plates according to any one of claims 6 or 7, the plates consisting of two half-plates assembled by welding or gluing. Radiateur d'automobile (10), caractérisé en ce qu'il est composé de plaques conformes à l'une quelconque des revendications 1 à 5 et de deux boîtes à fluide caloporteur (11, 12), les boîtes comprenant chacune une face ajourée (13) d'évidements dans chacun desquels une extrémité respective d'une des plaques (9) est engagée.Automobile radiator (10), characterized in that it is composed of plates in accordance with any one of claims 1 to 5 and of two heat transfer fluid boxes (11, 12), the boxes each comprising an openwork face ( 13) of recesses in each of which a respective end of one of the plates (9) is engaged. Radiateur d'automobile suivant la revendication 9, caractérisé en ce que les boîtes comprennent une enveloppe (14) unie à la face ajourée (13), les faces ajourées (13) et les enveloppes (14) étant en matériau polymérique.Automobile radiator according to claim 9, characterized in that the boxes comprise a casing (14) joined to the perforated face (13), the perforated faces (13) and the casings (14) being made of polymeric material.
EP19940400894 1993-04-28 1994-04-26 Radiator of an automotive vehicle Expired - Lifetime EP0622602B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9305010A FR2704635B1 (en) 1993-04-28 1993-04-28 Automobile radiator and manufacturing process.
FR9305010 1993-04-28

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EP0622602A2 true EP0622602A2 (en) 1994-11-02
EP0622602A3 EP0622602A3 (en) 1995-08-09
EP0622602B1 EP0622602B1 (en) 1998-03-04

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DE (1) DE69408708T2 (en)
FR (1) FR2704635B1 (en)

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WO2014205583A1 (en) * 2013-06-27 2014-12-31 Dana Canada Corporation Fluid channels having performance enhancement features and devices incorporating same
CN104269970A (en) * 2014-10-20 2015-01-07 成都育芽科技有限公司 Gas-liquid-double-medium cooler capable of being applied to motor cooling
US9958215B2 (en) 2013-03-15 2018-05-01 Dana Canada Corporation Heat transfer surface with nested tabs

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DE10213543A1 (en) * 2001-11-30 2003-06-12 Hartmut Koenig Heat exchanger for gases, has entire cross section taken up by parallel channels with no gaps in between
DE10218912A1 (en) 2002-04-27 2003-11-06 Modine Mfg Co Corrugated heat exchanger body
US7975479B2 (en) 2007-04-30 2011-07-12 Caterpillar Inc. Bi-material corrosive resistant heat exchanger

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US9958215B2 (en) 2013-03-15 2018-05-01 Dana Canada Corporation Heat transfer surface with nested tabs
WO2014205583A1 (en) * 2013-06-27 2014-12-31 Dana Canada Corporation Fluid channels having performance enhancement features and devices incorporating same
CN105339752A (en) * 2013-06-27 2016-02-17 达纳加拿大公司 Fluid channels having performance enhancement features and devices incorporating same
CN105339752B (en) * 2013-06-27 2018-09-28 达纳加拿大公司 Fluid line with performance enhancing components and the device for including the fluid line
CN104269970A (en) * 2014-10-20 2015-01-07 成都育芽科技有限公司 Gas-liquid-double-medium cooler capable of being applied to motor cooling
CN104269970B (en) * 2014-10-20 2017-02-15 青岛龙发热电有限公司 Gas-liquid-double-medium cooler capable of being applied to motor cooling

Also Published As

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DE69408708D1 (en) 1998-04-09
FR2704635B1 (en) 1995-06-02
EP0622602B1 (en) 1998-03-04
FR2704635A1 (en) 1994-11-04
EP0622602A3 (en) 1995-08-09
DE69408708T2 (en) 1998-09-17

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