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WO2004057257A2 - Heat exchanging module, in particular for motor vehicle, comprising a plurality of heat exchangers - Google Patents

Heat exchanging module, in particular for motor vehicle, comprising a plurality of heat exchangers Download PDF

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Publication number
WO2004057257A2
WO2004057257A2 PCT/FR2003/003844 FR0303844W WO2004057257A2 WO 2004057257 A2 WO2004057257 A2 WO 2004057257A2 FR 0303844 W FR0303844 W FR 0303844W WO 2004057257 A2 WO2004057257 A2 WO 2004057257A2
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WO
WIPO (PCT)
Prior art keywords
tubes
heat exchange
exchangers
exchange module
fins
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.)
Ceased
Application number
PCT/FR2003/003844
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French (fr)
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WO2004057257A3 (en
Inventor
Carlos Martins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Thermique Moteur SA
Original Assignee
Valeo Thermique Moteur SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Priority to AU2003299383A priority Critical patent/AU2003299383A1/en
Publication of WO2004057257A2 publication Critical patent/WO2004057257A2/en
Publication of WO2004057257A3 publication Critical patent/WO2004057257A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F28D1/04—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 tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/02—Arrangements of fins common to different heat exchange sections, the fins being in contact with different heat exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/12—Fins with U-shaped slots for laterally inserting conduits

Definitions

  • Heat exchanger module in particular for a motor vehicle, comprising a plurality of heat exchangers
  • the invention relates to a heat exchange module, in particular for a motor vehicle, comprising at least two heat exchangers, each heat exchanger consisting of a bundle of fluid circulation tubes connected to at least one manifold and which pass through cooling fins common to at least two exchangers of the module.
  • the invention relates to a heat exchange module comprising a plurality of heat exchangers having fluid circulation tubes traversed by the same air flow and cooling fins which have the shape of a rectangle elongated having two elongated sides and two short sides, the fins being common to at least two heat exchangers of the module.
  • a module is sometimes also called a "multi-exchanger" since it includes several heat exchangers having a common structural element, here the fins, which ensure the cohesion of the heat exchangers.
  • Heat exchange modules of this type are already known.
  • US Patent 6,173,766 discloses a heat exchange module consisting of three exchangers, namely a cooling radiator, a condenser and an oil cooling radiator assembled by brazing.
  • T hese exchangers have common cooling surfaces formed by corrugated spacers separated in two heat exchange zones.
  • Patent DE 100 14 475 similarly discloses a heat exchange module. It consists of two exchangers, namely a cooling radiator and a condenser forming part of the air conditioning circuit.
  • the cooling surfaces also constituted by. of the corrugated spacers, are common to the two exchangers and divided into two heat exchange zones.
  • the dimension, in particular the cross section, of the tubes of a heat exchanger is known to adapt the dimension, in particular the cross section, of the tubes of a heat exchanger to the nature of the fluid which passes through them.
  • the height of the tubes used for cooling the engine oil and / or the gearbox of the motor vehicle is greater than the height of the tubes used for the cooling radiator.
  • the term "height" here designates the width of the cross section of the tube which is generally oblong, for example rectangular or oval.
  • the present invention relates to a heat exchange module, in particular for a motor vehicle, of the type described above, which overcomes these drawbacks and which, in particular, allows in a simple manner to adapt the height of the tubes of the exchangers of the modulates the nature of the fluid passing through them while optimizing the thermal efficiency of the heat exchange and its size.
  • the spacing pitch of the tubes of at least one of the heat exchangers is different from the spacing pitch of at least one other heat exchanger of the module.
  • the tubes whose height is smaller for example the tubes of the engine cooling radiator, can be more tightened. This results in a reduced size and a better heat exchange between these tubes and the air flow which passes through them.
  • the tubes of an oil cooling radiator whose height is greater, can be spaced apart.
  • the fins common to the different exchangers of the module can, in a conventional manner, include perforations in which the tubes are introduced. They can also, according to a preferred secondary characteristic of the invention, comprise on one at least of the elongated sides cutouts for receiving the tubes into which the fluid circulation tubes of at least one of the exchangers are introduced.
  • the fins may also include cutouts for receiving the heat exchange tubes on each of the elongated sides.
  • the fins include notches of thermal insulation situated between the tubes of the exchangers.
  • the heat exchange module of the invention can be assembled by brazing in a single operation or else mechanically.
  • the module comprises, on the one hand, a motor cooling radiator on an elongated side of the fins and, on the other hand, a condenser and an oil cooling radiator on an opposite side of the fins.
  • An optimized module is thus formed which can be used on a motor vehicle.
  • the invention relates to a cooling fin for a heat exchange module according to the invention.
  • Figure 1 is a general perspective view of a heat exchange module according to the present invention.
  • FIG. 2 is a top view of a cooling fin of the heat exchange module of Figure
  • Figure 3 is a top view of an alternative embodiment of a cooling fin of the heat exchange module shown in Figure 1;
  • FIG. 4 is a top view of a second alternative embodiment of a cooling fin adapted to the heat exchange module of FIG. 1.
  • the heat exchange module of Figure 1 is composed of a radiator 2 for cooling a vehicle engine
  • the cooling radiator 2 consists in a known manner of a body produced from a bundle of vertical fluid circulation tubes, mounted between two manifolds 8 and 10, the manifolds being arranged along two parallel sides of the body and provided with inlet tubing 12 and tubing outlet (not visible in the drawing) for the vehicle engine coolant.
  • the condenser 4 also consists of a body produced from a bundle of vertical fluid circulation tubes mounted between two manifolds 14 and 16, the manifolds being arranged along two parallel sides of the body and provided with an inlet tubing 18 and an outlet tubing 19 for a refrigerant.
  • the cooling radiator 6 also consists of a body made from a bundle of vertical fluid circulation tubes mounted between two manifolds 20 and 22, the manifolds being arranged along two parallel sides of the body and provided with an inlet pipe 24 and an outlet pipe 25 for the oil to be cooled.
  • the tubes of the condenser 4 and of the oil cooling radiator 6 are arranged in the extension of one another and constitute a first row of tubes.
  • the tubes of the cooling radiator 2 extend over the entire length of the heat exchange module and constitute a second row of tubes.
  • the first row and the second row of tubes are traversed by the same air flow, the condenser and the cooling radiator being arranged upstream with respect to the direction of flow of the air flow.
  • the cooling radiator, the condenser and the oil radiator are assembled by means of fins 26 common to the three exchangers.
  • FIG 2 a plan view of a fin 26 of the heat exchange module according to the invention shown in Figure 1.
  • the fin 26 presents, seen from above, the shape of an elongated rectangle having two parallel elongated sides 28 and 30 and two small parallel sides 32.
  • the elongated side 28 has cutouts 34 for the reception of the tubes 36 of the cooling radiator 2.
  • the cutouts 34 are regularly spaced from one another at a constant spacing pitch PI over the entire length of the long side 28.
  • the elongated side 30 comprises on its side two types of cut, namely on the one hand cutouts 38 intended for the tubes 40 of the condenser 4 and, on the other hand, cutouts 42 intended to receive the tubes 44 of the cooling radiator 6
  • the spacing step P2 of the condenser tubes 40 is constant. In the example shown, it is also equal to the spacing pitch PI of the tubes 36 of the cooling radiator 2.
  • the tubes 44 are more spaced than the tubes 40 and the tubes 36 of the cooling radiator. They have a step P3 which is greater than the step P2 and also the step PI.
  • the height H3 of the tubes 44 of the oil cooling radiator 6 is greater than the height H2 of the tubes 40 of the condenser 4 and that the height H1 of the tubes 36 of the cooling radiator 2.
  • one of the exchangers, the oil cooling radiator 6 in the example shown comprises tubes whose spacing pitch P3 differs from the spacing pitch pi, P2 of the other two exchangers. a difference in pitch is thus observed on the same large side of the fins, that is to say on the same large face of the module.
  • the respective tubes of the three exchangers 2, 4 and 6 all have a cross section of substantially rectangular shape, the heights H1, H2 and H3 corresponding, as already indicated, to the width of this cross section.
  • the tubes 36 of the radiator 2 can be a single channel or two channels.
  • the tubes 40 of the condenser 4 and the tubes 44 of the oil cooling radiator 6 are tubes with several channels.
  • FIG 3 an alternative embodiment of the fin 26 shown in Figure 2.
  • This fin is intended for a brazed type exchanger.
  • the exchangers are assemblers of a single operation in an oven.
  • the fins have cutouts on either side of the elongated sides 28 and 30.
  • the notches 46 for thermal insulation are provided between the tubes 36 and 38 on the one hand, 36 and 44 on the other hand.
  • the notches 46 have the function of preventing a thermal bridge between the cooling radiator 2 and the two other exchangers of the exchange module.
  • FIG 4 a third alternative embodiment of the fin 26 of the exchange module shown in Figure 1.
  • the fin 26 has notches 38 for the tubes 40 of the condenser 4 and notches 42 intended for the tubes 44 of the oil cooling radiator 6 on its elongated side 30.
  • the elongated side 28 of the fin 26 does not have notches, but elongated oval perforations 48 in which the radiator tubes are driven perpendicular to the plane of the fin.
  • the tubes therefore have a suitable oval section.
  • This alternative embodiment is intended for a mechanically assembled heat exchange module.
  • the thermal insulation notches 46 are also provided between the tubes of the cooling radiator 2 and the tubes of the other two exchangers.
  • the invention finds a particular application in the automotive field.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention concerns a heat exchanging module comprising a plurality of heat exchangers including fluid circulating tubes (36, 40, 44) traversed by a common air stream and cooling fins (26) shaped like an elongated rectangular having two parallel opposite elongated large sides (28, 30) and two small sides (32). The cooling fins (26) are shared by at least two exchangers (2, 4, 6) of the module. At least two of said heat exchangers (2, 4, 6) are located on a common elongated side (28, 30) of the fins (26). The invention is applicable to motor vehicles.

Description

Module d'échangeur de chaleur, notamment ' pour véhicule automobile, comportant une pluralité d' échangeurs de chaleurHeat exchanger module, in particular for a motor vehicle, comprising a plurality of heat exchangers

L'invention concerne un module d'échange de chaleur, notamment pour véhicule automobile, comprenant au moins deux échangeurs de chaleur, chaque échangeur de chaleur étant constitué d'un faisceau de tubes de circulation de fluide raccordés à au moins une boîte collectrice et qui traversent des ailettes de refroidissement communes à au moins deux échangeurs du module .The invention relates to a heat exchange module, in particular for a motor vehicle, comprising at least two heat exchangers, each heat exchanger consisting of a bundle of fluid circulation tubes connected to at least one manifold and which pass through cooling fins common to at least two exchangers of the module.

Plus précisément, l'invention concerne un module d'échange de chaleur comportant une pluralité d' échangeurs de chaleur ayant des tubes de circulation de fluide traversés par un même flux d'air et des ailettes de refroidissement qui présentent la forme d'un rectangle allongé comportant deux côtés allongés et deux petits côtés, les ailettes étant communes à au moins deux échangeurs de chaleur du module. Un tel module est parfois appelé aussi "multi-échangeur" étant donné qu'il regroupe plusieurs échangeurs de chaleur ayant un élément structurel commun, ici les ailettes, qui assurent la cohésion des échangeurs de chaleur.More specifically, the invention relates to a heat exchange module comprising a plurality of heat exchangers having fluid circulation tubes traversed by the same air flow and cooling fins which have the shape of a rectangle elongated having two elongated sides and two short sides, the fins being common to at least two heat exchangers of the module. Such a module is sometimes also called a "multi-exchanger" since it includes several heat exchangers having a common structural element, here the fins, which ensure the cohesion of the heat exchangers.

On connaît déjà des modules d'échange de chaleur de ce type. Le brevet US 6 173 766 divulgue un module d'échange de chaleur constitué de trois échangeurs, à savoir un radiateur de refroidissement, un condenseur et un radiateur de refroidissement d'huile assemblés par brasage . Ces échangeurs comportent des surfaces de refroidissement communes constituées par des intercalaires ondulés séparés en deux zones d'échange de chaleur.Heat exchange modules of this type are already known. US Patent 6,173,766 discloses a heat exchange module consisting of three exchangers, namely a cooling radiator, a condenser and an oil cooling radiator assembled by brazing. T hese exchangers have common cooling surfaces formed by corrugated spacers separated in two heat exchange zones.

Le brevet DE 100 14 475 divulgue de la même manière un module d'échange de chaleur. Il est constitué de deux échangeurs, à savoir un radiateur de refroidissement et un condenseur faisant partie du circuit de climatisation. Les surfaces de refroidissement, également constituées par . des intercalaires ondulés, sont communes aux deux échangeurs et divisées en deux zones d'échange de chaleur.Patent DE 100 14 475 similarly discloses a heat exchange module. It consists of two exchangers, namely a cooling radiator and a condenser forming part of the air conditioning circuit. The cooling surfaces, also constituted by. of the corrugated spacers, are common to the two exchangers and divided into two heat exchange zones.

Il est connu d'adapter la dimension, notamment la section transversale, des tubes d'un echangeur de chaleur à la nature du fluide qui les traverse. Par exemple, la hauteur des tubes utilisés pour le refroidissement de l'huile du moteur et/ou de la boîte de vitesse du véhicule automobile est plus importante que la hauteur des tubes utilisés pour le radiateur de refroidissement. Le terme "hauteur" désigne ici la largeur de la section transversale du tube qui est de forme générale oblongue, par exemple rectangulaire ou ovale.It is known to adapt the dimension, in particular the cross section, of the tubes of a heat exchanger to the nature of the fluid which passes through them. For example, the height of the tubes used for cooling the engine oil and / or the gearbox of the motor vehicle is greater than the height of the tubes used for the cooling radiator. The term "height" here designates the width of the cross section of the tube which is generally oblong, for example rectangular or oval.

Dans un module d'échange de chaleur constitué de plusieurs échangeurs traversés par un même flux d'air, il est difficile d'adapter la hauteur des tubes à la nature des fluides parce que, par exemple dans le document US 6 173 766, les surfaces de refroidissement constituées par des intercalaires ondulés communes à tous les échangeurs ont une hauteur constante. La hauteur des tubes du premier rang de tubes est nécessairement égale à la hauteur des tubes du second rang. De ce fait, dans un module d'échange de chaleur où le premier rang de tubes forme un radiateur de refroidissement d'huile et le second rang de tubes forme un radiateur de refroidissement du moteur, on préférera sur- dimensionner les tubes du radiateur de refroidissement du moteur plutôt que de sous-dimensionner les tubes du radiateur de refroidissement d'huile. En conséquence, l'encombrement du radiateur est augmenté. D'autre part, le rendement de l'échange thermique chute.In a heat exchange module consisting of several exchangers through which the same air flow passes, it is difficult to adapt the height of the tubes to the nature of the fluids because, for example in document US Pat. No. 6,173,766, the cooling surfaces constituted by corrugated spacers common to all the exchangers have a constant height. The height of the tubes of the first row of tubes is necessarily equal to the height of the tubes of the second row. Therefore, in a heat exchange module where the first row of tubes forms an oil cooling radiator and the second row of tubes forms an engine cooling radiator, it is preferable to oversize the radiator tubes of engine cooling rather than undersizing the oil cooler tubes. Consequently, the size of the radiator is increased. On the other hand, the efficiency of the heat exchange drops.

Dans un module d'échange de chaleur tel que celui qui est divulgué par le document DE 100 14 475, le problème de hauteurs de tubes différentes est résolu en utilisant des surfaces de refroidissement constituées par des intercalaires ondulés de hauteur variable. Cette solution est complexe à mettre en oeuvre. De plus, même dans ce cas, le pas d'espacement des tubes est le même pour tous les échangeurs de telle sorte que l'encombrement du radiateur n'est pas optimisé.In a heat exchange module such as that disclosed by document DE 100 14 475, the problem of different tube heights is solved by using cooling surfaces constituted by corrugated spacers of variable height. This solution is complex to implement. Furthermore, even in this case, the spacing pitch of the tubes is the same for all exchangers so that the space requirement of the radiator is not optimized.

On connaît également, d'après la brevet FR n°00 02453, un module d'échange de chaleur pour véhicule automobile dans lequel les surfaces d'échange de chaleur communes sont constituées par des ailettes planes comportant des découpes dans lesquelles les tubes des échangeurs sont introduits. Toutefois, dans un module d'échange de chaleur de ce type, les tubes qui sont introduits dans les découpes proviennent d'un même echangeur de chaleur, le pas d'espacement des découpes est constant pour tous les tubes de cet echangeur. L'encombrement des échangeurs constituant le module n'est donc pas optimisé.Also known, from patent FR n ° 00 02453, a heat exchange module for a motor vehicle in which the common heat exchange surfaces consist of flat fins having cutouts in which the tubes of the exchangers are introduced. However, in a heat exchange module of this type, the tubes which are introduced into the cutouts come from the same heat exchanger, the spacing spacing of the cutouts is constant for all the tubes of this exchanger. The size of the exchangers constituting the module is therefore not optimized.

La présente invention a pour objet un module d'échange de chaleur, notamment pour véhicule automobile, du type décrit ci-dessus, qui remédie à ces inconvénients et qui, notamment, permet de manière simple d'adapter la hauteur des tubes des échangeurs du module à la nature du fluide qui les traverse tout en optimisant le rendement thermique de 1 ' échange de chaleur et son encombrement .The present invention relates to a heat exchange module, in particular for a motor vehicle, of the type described above, which overcomes these drawbacks and which, in particular, allows in a simple manner to adapt the height of the tubes of the exchangers of the modulates the nature of the fluid passing through them while optimizing the thermal efficiency of the heat exchange and its size.

Ce but est atteint, conformément à la principale caractéristique de l'invention, par le fait qu'au moins deux desdits échangeurs de chaleur du module sont situés sur un même coté allongé des ailettes.This object is achieved, in accordance with the main characteristic of the invention, by the fact that at least two of said module heat exchangers are located on the same elongated side of the fins.

Selon une autre caractéristique de l'invention, le pas d'espacement des tubes de l'un au moins des échangeurs de chaleur est différent du pas d'espacement d'au moins un autre echangeur de chaleur du module .According to another characteristic of the invention, the spacing pitch of the tubes of at least one of the heat exchangers is different from the spacing pitch of at least one other heat exchanger of the module.

Grâce à cette caractéristique, les tubes dont la hauteur est plus petite, par exemple les tubes du radiateur de refroidissement du moteur, peuvent être plus resserrés. Il en résulte un encombrement réduit et un meilleur échange de chaleur entre ces tubes et le flux d'air qui les traverse. Inversement, les tubes d'un radiateur de refroidissement d'huile, dont la hauteur est plus importante peuvent être plus espacés.Thanks to this characteristic, the tubes whose height is smaller, for example the tubes of the engine cooling radiator, can be more tightened. This results in a reduced size and a better heat exchange between these tubes and the air flow which passes through them. Conversely, the tubes of an oil cooling radiator, whose height is greater, can be spaced apart.

Conformément à l'invention il est possible notamment de prévoir que deux échangeurs de chaleur, qui sont reçus d'un même côté des ailettes, aient des pas respectifs différents.According to the invention it is possible in particular to provide that two heat exchangers, which are received on the same side of the fins, have different respective pitches.

Les ailettes communes aux différents échangeurs du module peuvent, de manière classique, comporter des perforations dans lesquelles les tubes sont introduits. Elles peuvent également, selon une caractéristique secondaire préférée de l'invention, comporter sur l'un au moins des côtés allongés des découpes de réception des tubes dans lesquelles les tubes de circulation de fluide de l'un au moins des échangeurs sont introduits.The fins common to the different exchangers of the module can, in a conventional manner, include perforations in which the tubes are introduced. They can also, according to a preferred secondary characteristic of the invention, comprise on one at least of the elongated sides cutouts for receiving the tubes into which the fluid circulation tubes of at least one of the exchangers are introduced.

Les ailettes peuvent également comporter des découpes de réception des tubes d'échange de chaleur sur chacun des côtés allongés.The fins may also include cutouts for receiving the heat exchange tubes on each of the elongated sides.

Avantageusement, les ailettes comportent des échancrures d' isolation thermique situées entre les tubes des échangeurs .Advantageously, the fins include notches of thermal insulation situated between the tubes of the exchangers.

Le module d'échange de chaleur de l'invention peut être assemblé par brasage en une seule opération ou bien mécaniquement .The heat exchange module of the invention can be assembled by brazing in a single operation or else mechanically.

Dans une application préférentielle de l'invention, le module comprend, d'une part, un radiateur de refroidissement d'un moteur sur un côté allongé des ailettes et, d'autre part, un condenseur et un radiateur de refroidissement d'huile sur un côté opposé des ailettes. On forme ainsi un module optimisé pouvant être utilisé sur un véhicule automobile. Enfin, l'invention concerne une ailette de refroidissement pour un module d'échange de chaleur conforme à l'invention.In a preferred application of the invention, the module comprises, on the one hand, a motor cooling radiator on an elongated side of the fins and, on the other hand, a condenser and an oil cooling radiator on an opposite side of the fins. An optimized module is thus formed which can be used on a motor vehicle. Finally, the invention relates to a cooling fin for a heat exchange module according to the invention.

D'autres caractéristiques et avantages de l'invention apparaîtront encore à la lecture de la description qui suit d'exemples de réalisation donnés à titre illustratif, en référence aux dessins annexés, sur lesquels :Other characteristics and advantages of the invention will become apparent on reading the following description of embodiments given by way of illustration, with reference to the appended drawings, in which:

la figure 1 est une vue générale en perspective d'un module d'échange de chaleur conforme à la présente invention ;Figure 1 is a general perspective view of a heat exchange module according to the present invention;

la figure 2 est une vue de dessus d'une ailette de refroidissement du module d'échange de chaleur de la figureFigure 2 is a top view of a cooling fin of the heat exchange module of Figure

1 ;1;

la figure 3 est une vue de dessus d'une variante de réalisation d'une ailette de refroidissement du module d'échange de chaleur représenté sur la figure 1 ;Figure 3 is a top view of an alternative embodiment of a cooling fin of the heat exchange module shown in Figure 1;

la figure 4 est une vue de dessus d'une seconde variante de réalisation d'une ailette de refroidissement adaptée au module d'échange de chaleur de la figure 1.FIG. 4 is a top view of a second alternative embodiment of a cooling fin adapted to the heat exchange module of FIG. 1.

Le module d'échange de chaleur de la figure 1 est composé d'un radiateur 2 de refroidissement d'un moteur de véhiculeThe heat exchange module of Figure 1 is composed of a radiator 2 for cooling a vehicle engine

•automobile, d'un condenseur 4 de climatisation et d'un radiateur de refroidissement d'huile 6, ces trois échangeurs étant généralement plans . Le radiateur 2 est situé à l'arrière, tandis que le condenseur 4 et le radiateur 6 sont tous deux situés à l'avant si l'on observe le dessin de la figure 1. • automobile, an air conditioning condenser 4 and an oil cooling radiator 6, these three exchangers being generally planar. The radiator 2 is located at the rear, while the condenser 4 and the radiator 6 are both located at the front if one observes the drawing of FIG. 1.

Le radiateur de refroidissement 2 est constitué de façon connue d'un corps réalisé à partir d'un faisceau de tubes verticaux de circulation de fluide, montés entre deux boîtes collectrices 8 et 10, les boîtes collectrices étant disposées le long de deux côtés parallèles du corps et munies d'une tubulures d'entrée 12 et d'une tubulure de sortie (non visible sur le dessin) pour le fluide de refroidissement du moteur du véhicule.The cooling radiator 2 consists in a known manner of a body produced from a bundle of vertical fluid circulation tubes, mounted between two manifolds 8 and 10, the manifolds being arranged along two parallel sides of the body and provided with inlet tubing 12 and tubing outlet (not visible in the drawing) for the vehicle engine coolant.

Le condenseur 4 est également constitué d'un corps réalisé à partir d'un faisceau de tubes verticaux de circulation de fluide montés entre deux boîtes collectrices 14 et 16, les boîtes collectrices étant disposées le long de deux côtés parallèles du corps et munies d'une tubulures d'entrée 18 et d'une tubulure de sortie 19 pour un fluide réfrigérant.The condenser 4 also consists of a body produced from a bundle of vertical fluid circulation tubes mounted between two manifolds 14 and 16, the manifolds being arranged along two parallel sides of the body and provided with an inlet tubing 18 and an outlet tubing 19 for a refrigerant.

Le radiateur de refroidissement 6 est lui aussi constitué d'un corps réalisé à partir d'un faisceau de tubes verticaux de circulation de fluide montés entre deux boîtes collectrices 20 et 22, les boîtes collectrices étant disposées le long de deux côtés parallèles du corps et munies d'un tubulure d'entrée 24 et d'une tubulure de sortie 25 pour l'huile à refroidir.The cooling radiator 6 also consists of a body made from a bundle of vertical fluid circulation tubes mounted between two manifolds 20 and 22, the manifolds being arranged along two parallel sides of the body and provided with an inlet pipe 24 and an outlet pipe 25 for the oil to be cooled.

Les tubes du condenseur 4 et du radiateur de refroidissement d'huile 6 sont disposés dans le prolongement l'un de l'autre et constituent un premier rang de tubes . Les tubes du radiateur de refroidissement 2 s'étendent sur toute la longueur du module d'échange de chaleur et constituent un deuxième rang de tubes . Le premier rang et le second rang de tubes sont traversés par un même flux d'air, le condenseur et le radiateur de refroidissement étant disposés en amont par rapport au sens de l'écoulement du flux d'air.The tubes of the condenser 4 and of the oil cooling radiator 6 are arranged in the extension of one another and constitute a first row of tubes. The tubes of the cooling radiator 2 extend over the entire length of the heat exchange module and constitute a second row of tubes. The first row and the second row of tubes are traversed by the same air flow, the condenser and the cooling radiator being arranged upstream with respect to the direction of flow of the air flow.

Le radiateur de refroidissement, le condenseur et le radiateur d'huile sont assemblés par l'intermédiaire d'ailettes 26 communes aux trois échangeurs. On constitue ainsi un module ou "multi-échangeur" formé de trois échangeurs de chaleur différents qui partagent des ailettes communes .The cooling radiator, the condenser and the oil radiator are assembled by means of fins 26 common to the three exchangers. This constitutes a module or "multi-exchanger" formed of three different heat exchangers which share common fins.

On a représenté sur la figure 2 une vue en plan d'une ailette 26 du module d'échange de chaleur conforme à l'invention représenté sur la figure 1. L'ailette 26 présente, vue de dessus, la forme d'un rectangle allongé ayant deux côtés allongés parallèles 28 et 30 et deux petits côtés parallèles 32. Le côté allongé 28 comporte des découpes 34 pour la réception des tubes 36 du radiateur de refroidissement 2. Les découpes 34 sont régulièrement espacées l'une de l'autre selon un pas d'espacement PI constant sur toute la longueur du grand côté 28.There is shown in Figure 2 a plan view of a fin 26 of the heat exchange module according to the invention shown in Figure 1. The fin 26 presents, seen from above, the shape of an elongated rectangle having two parallel elongated sides 28 and 30 and two small parallel sides 32. The elongated side 28 has cutouts 34 for the reception of the tubes 36 of the cooling radiator 2. The cutouts 34 are regularly spaced from one another at a constant spacing pitch PI over the entire length of the long side 28.

Le côté allongé 30 comporte de son côté deux types de découpe, à savoir d'une part des découpes 38 destinées aux tubes 40 du condenseur 4 et, d'autre part, des découpes 42 destinées à recevoir les tubes 44 du radiateur de refroidissement 6. Le pas d'espacement P2 des tubes 40 du condenseur est constant. Dans l'exemple représenté il est en outre égal au pas d'espacement PI des tubes 36 du radiateur de refroidissement 2. En revanche, les tubes 44 sont plus espacés que les tubes 40 et les tubes 36 du radiateur de refroidissement. Ils ont un pas P3 qui est supérieur au pas P2 et aussi au pas PI.The elongated side 30 comprises on its side two types of cut, namely on the one hand cutouts 38 intended for the tubes 40 of the condenser 4 and, on the other hand, cutouts 42 intended to receive the tubes 44 of the cooling radiator 6 The spacing step P2 of the condenser tubes 40 is constant. In the example shown, it is also equal to the spacing pitch PI of the tubes 36 of the cooling radiator 2. On the other hand, the tubes 44 are more spaced than the tubes 40 and the tubes 36 of the cooling radiator. They have a step P3 which is greater than the step P2 and also the step PI.

Par ailleurs, la hauteur H3 des tubes 44 du radiateur de refroidissement de l'huile 6 est plus importante que la- hauteur H2 des tubes 40 du condenseur 4 et que la hauteur Hl des tubes 36 du radiateur de refroidissement 2. Dans ces conditions, l'un des échangeurs, le radiateur de refroidissement d'huile 6 dans l'exemple représenté, comporte des tubes dont le pas d'espacement P3 diffère du pas d'espacement pi, P2 des deux autres échangeurs. on observe ainsi une différence de pas sur un même grand côté des ailettes, c'est-à-dire sur une même grande face du module. Dans l'exemple représenté, les tubes respectifs des trois échangeurs 2, 4 et 6 ont tous une section transversale de forme sensiblement rectangulaire, les hauteurs Hl, H2 et H3 correspondant, comme déjà indiqué, à la largeur de cette section transversale. Les tubes 36 du radiateur 2 peuvent être à un seul canal ou à deux canaux. Les tubes 40 du condenseur 4 et les tubes 44 du radiateur de refroidissement d'huile 6 sont des tubes à plusieurs canaux. On a représenté sur la figure 3 une variante de réalisation de l'ailette 26 représentée sur la figure 2. Cette ailette est destinée à un echangeur de type brasé . Selon cette technologie, les échangeurs sont assembleurs d'une seule opération dans un four. Dans cette variante de réalisation, les ailettes comportent des découpes de part et d'autre des côtés allongés 28 et 30. En outre, les échancrures 46 d'isolation thermique sont prévues entre les tubes 36 et 38 d'une part, 36 et 44 d'autre part. Les échancrures 46 ont pour fonction d'empêcher un pont thermique entre le radiateur de refroidissement 2 et les deux autres échangeurs du module d'échange.Furthermore, the height H3 of the tubes 44 of the oil cooling radiator 6 is greater than the height H2 of the tubes 40 of the condenser 4 and that the height H1 of the tubes 36 of the cooling radiator 2. Under these conditions, one of the exchangers, the oil cooling radiator 6 in the example shown, comprises tubes whose spacing pitch P3 differs from the spacing pitch pi, P2 of the other two exchangers. a difference in pitch is thus observed on the same large side of the fins, that is to say on the same large face of the module. In the example shown, the respective tubes of the three exchangers 2, 4 and 6 all have a cross section of substantially rectangular shape, the heights H1, H2 and H3 corresponding, as already indicated, to the width of this cross section. The tubes 36 of the radiator 2 can be a single channel or two channels. The tubes 40 of the condenser 4 and the tubes 44 of the oil cooling radiator 6 are tubes with several channels. There is shown in Figure 3 an alternative embodiment of the fin 26 shown in Figure 2. This fin is intended for a brazed type exchanger. According to this technology, the exchangers are assemblers of a single operation in an oven. In this alternative embodiment, the fins have cutouts on either side of the elongated sides 28 and 30. In addition, the notches 46 for thermal insulation are provided between the tubes 36 and 38 on the one hand, 36 and 44 on the other hand. The notches 46 have the function of preventing a thermal bridge between the cooling radiator 2 and the two other exchangers of the exchange module.

On a représenté sur la figure 4 une troisième variante de réalisation de l'ailette 26 du module d'échange représenté sur la figure 1. Dans cette variante, l'ailette 26 comporte des échancrures 38 destinées aux tubes 40 du condenseur 4 et des échancrures 42 destinées aux tubes 44 du radiateur de refroidissement d'huile 6 sur son côté allongé 30. En revanche, le côté allongé 28 de l'ailette 26 ne comporte pas d' échancrures, mais des perforations ovales allongées 48 dans lesquelles les tubes du radiateur de refroidissement sont enfoncés perpendiculairement au plan de l'ailette. Les tubes ont en conséqence une section de forme ovale adaptée.There is shown in Figure 4 a third alternative embodiment of the fin 26 of the exchange module shown in Figure 1. In this variant, the fin 26 has notches 38 for the tubes 40 of the condenser 4 and notches 42 intended for the tubes 44 of the oil cooling radiator 6 on its elongated side 30. On the other hand, the elongated side 28 of the fin 26 does not have notches, but elongated oval perforations 48 in which the radiator tubes are driven perpendicular to the plane of the fin. The tubes therefore have a suitable oval section.

Cette variante de réalisation est destinée à un module d'échange de chaleur assemblé mécaniquement. En outre, les échancrures d'isolation thermique 46 sont également prévues entre les tubes du radiateur de refroidissement 2 et les tubes des deux autres échangeurs .This alternative embodiment is intended for a mechanically assembled heat exchange module. In addition, the thermal insulation notches 46 are also provided between the tubes of the cooling radiator 2 and the tubes of the other two exchangers.

L'invention trouve une application particulière dans le domaine de l'automobile. The invention finds a particular application in the automotive field.

Claims

Revendications claims 1. Module d'échange de chaleur comprenant une pluralité d' échangeurs de chaleur (2, 4, 6) comportant des tubes de circulation de fluide (36, 40, 44) traversés par un même flux d'air et des ailettes de refroidissement (26) présentant la forme d'un rectangle allongé comportant deux côtés opposés parallèles allongés (28, 30) et deux petits côtés opposés parallèles (32) , communes à au moins deux des échangeurs de chaleur (2, 4, 6) du module, caractérisé en ce qu'au moins deux desdits échangeurs de chaleur (2, 4, 6) sont situés sur un même coté allongé (28, 30) des ailettes1. Heat exchange module comprising a plurality of heat exchangers (2, 4, 6) comprising fluid circulation tubes (36, 40, 44) traversed by the same air flow and cooling fins (26) having the shape of an elongated rectangle comprising two elongated parallel opposite sides (28, 30) and two parallel parallel short sides (32), common to at least two of the module's heat exchangers (2, 4, 6) , characterized in that at least two of said heat exchangers (2, 4, 6) are located on the same elongated side (28, 30) of the fins (26) .(26). 2. Module d'échange de chaleur selon la revendication 1, caractérisé en ce que le pas d'espacement (P3) de l'un au moins des échangeurs de chaleur (6) est différent du pas d'espacement (PI, P2) d'au moins un autre echangeur de chaleur (2, 4) du module d'échange de chaleur.2. heat exchange module according to claim 1, characterized in that the spacing pitch (P3) of at least one of the heat exchangers (6) is different from the spacing pitch (PI, P2) at least one other heat exchanger (2, 4) of the heat exchange module. 3. Module d'échange de chaleur selon l'une des revendications 1 et 2, caractérisé en ce que deux échangeurs de chaleur (4, 6) situés sur un même côté allongé (30) des ailettes ont des pas respectifs (P2, P3) différents.3. heat exchange module according to one of claims 1 and 2, characterized in that two heat exchangers (4, 6) located on the same elongated side (30) of the fins have respective pitches (P2, P3 ) different. 4. Module d'échange de chaleur selon l'une des revendications 1 à 3 , caractérisé en ce que les ailettes (26) comportent sur l'un au moins des côtés allongés (28, 30) des découpes (34, 38, 42) de réception des tubes dans lesquels les tubes (36, 40, 44) de circulation de fluide de l'un au moins des échangeurs (2, 4, 6) sont introduits.4. heat exchange module according to one of claims 1 to 3, characterized in that the fins (26) have on at least one of the elongated sides (28, 30) of the cutouts (34, 38, 42 ) receiving tubes into which the tubes (36, 40, 44) for circulating fluid of at least one of the exchangers (2, 4, 6) are introduced. 5. Module d'échange de chaleur selon la revendication 4, caractérisé en ce qu'il comporte des découpes de réception des tubes (36, 40, 44) sur chacun des côtés allongés (28, 30) . 5. Heat exchange module according to claim 4, characterized in that it comprises cutouts for receiving the tubes (36, 40, 44) on each of the elongated sides (28, 30). 6. Module d'échange de chaleur selon l'une des revendications 1 à 5, caractérisé en ce que les ailettes (26) comportent des échancrures (46) d'isolation thermique situées entre les tubes (36, 40, 44) des échangeurs (2, 4, 6) .6. heat exchange module according to one of claims 1 to 5, characterized in that the fins (26) have notches (46) of thermal insulation located between the tubes (36, 40, 44) of the exchangers (2, 4, 6). 7. Module d'échange de chaleur selon l'une des revendications 1 à 6, caractérisé en ce que les échangeurs de chaleur (2, 4, 6) sont assemblés par brasage en une seule opération.7. Heat exchange module according to one of claims 1 to 6, characterized in that the heat exchangers (2, 4, 6) are assembled by brazing in a single operation. 8. Module d'échange de chaleur selon l'une des revendications 1 à 6, caractérisé en ce que les échangeurs de chaleur (2, 4, 6) sont assemblés mécaniquement.8. Heat exchange module according to one of claims 1 to 6, characterized in that the heat exchangers (2, 4, 6) are assembled mechanically. 9. Module d'échange de chaleur selon l'une des revendications 1 à 8, caractérisé en ce qu'il comprend, d'une part, un radiateur de refroidissement de moteur (2) sur un côté allongé (28) des ailettes et, d'autre part, à la fois un condenseur (4) et un radiateur de refroidissement d'huile (6) sur un côté allongé opposé (30) des ailettes.9. Heat exchange module according to one of claims 1 to 8, characterized in that it comprises, on the one hand, an engine cooling radiator (2) on an elongated side (28) of the fins and , on the other hand, both a condenser (4) and an oil cooling radiator (6) on an opposite elongated side (30) of the fins. 10. Ailettes de refroidissement (26) faisant partie d'un module d'échange de chaleur selon l'une des revendications 1 à 9. 10. Cooling fins (26) forming part of a heat exchange module according to one of claims 1 to 9.
PCT/FR2003/003844 2002-12-19 2003-12-19 Heat exchanging module, in particular for motor vehicle, comprising a plurality of heat exchangers Ceased WO2004057257A2 (en)

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FR02/16204 2002-12-19
FR0216204A FR2849173B1 (en) 2002-12-19 2002-12-19 HEAT EXCHANGER MODULE, IN PARTICULAR FOR A MOTOR VEHICLE, COMPRISING A PLURALITY OF HEAT EXCHANGERS

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AU2003299383A1 (en) 2004-07-14
FR2849173A1 (en) 2004-06-25
AU2003299383A8 (en) 2004-07-14
FR2849173B1 (en) 2006-01-27

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