EP0473474B1 - Header of a main heat exchanger, in particular for motor vehicles, containing a second heat exchanger - Google Patents

Header of a main heat exchanger, in particular for motor vehicles, containing a second heat exchanger Download PDF

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Publication number
EP0473474B1
EP0473474B1 EP91402076A EP91402076A EP0473474B1 EP 0473474 B1 EP0473474 B1 EP 0473474B1 EP 91402076 A EP91402076 A EP 91402076A EP 91402076 A EP91402076 A EP 91402076A EP 0473474 B1 EP0473474 B1 EP 0473474B1
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EP
European Patent Office
Prior art keywords
heat exchanger
water header
wall
secondary heat
slide
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.)
Expired - Lifetime
Application number
EP91402076A
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German (de)
French (fr)
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EP0473474A1 (en
Inventor
Philippe Le Gauyer
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
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Valeo Thermique Moteur SA
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Publication of EP0473474A1 publication Critical patent/EP0473474A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/0075—Supports for plates or plate assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0234—Header boxes; End plates having a second heat exchanger disposed there within, e.g. oil cooler
    • 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
    • F28F21/067—Details
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/916—Oil cooler

Definitions

  • the invention relates to a water box of a main heat exchanger as defined in the preamble of claim 1 and known, for example, from patent application FR-A-2,549,593.
  • the main heat exchanger is traversed by a first fluid while the secondary heat exchanger is traversed by a second fluid which is cooled by the first fluid.
  • the first fluid is the coolant of a heat engine
  • the second fluid can be a lubricating oil of a heat engine, a gearbox oil or an engine oil. 'a torque converter.
  • the coolant not only performs its usual function of cooling the engine, but also an additional function of cooling a fluid linked to the operation of the vehicle.
  • the secondary heat exchanger is introduced through an open face of the water box and the latter is then connected to the body or to the bundle of the main heat exchanger.
  • the secondary heat exchanger comprises two connecting pipes, respectively serving for the inlet and the outlet of the second fluid, which seal through two orifices of a wall of the water box and which serve for fixing and holding of the secondary heat exchanger inside the water box.
  • the two connecting pipes are attached to the secondary heat exchanger after the latter has been placed inside the water box.
  • Each of the two connecting pipes is then introduced, from the outside of the water box, successively through one of the aforementioned orifices of the wall and into an appropriate receiving housing which the second heat exchanger includes.
  • This solution has the advantage that it allows the use of a secondary heat exchanger whose external dimensions correspond substantially to the internal dimensions of the water box, which improves the efficiency of the secondary heat exchanger, while using a standard size water box.
  • the object of the invention is in particular to overcome this drawback.
  • the water box comprises two slides suitable for receiving respectively two slides integral with the secondary heat exchanger.
  • These two slides are advantageously constituted by two coaxial flanges to the two housing for receiving the secondary heat exchanger.
  • each of the flanges has two opposite annular faces, one of which is capable of coming into abutment against the wall of the water box and the other against a wall of the slide which is separated from the wall of the water box. from a distance slightly greater than the thickness of the collar.
  • the flange is attached to the body of the secondary heat exchanger by a cylindrical part of smaller diameter than that of the flange, the wall of the slide has a notch limited by two parallel edges opposite defining the direction in translation and which are separated by a distance substantially equal to the external diameter of the cylindrical part, the notch being open at one end to allow the introduction of the flange and being closed at its other end to form a stop.
  • the latter is advantageously formed by a semi-circular edge which connects the two parallel edges of the notch, the diameter of which is substantially equal to the diameter of the cylindrical part and the center of which is aligned with the center of a passage orifice. .
  • FIG. 1 shows a device known from patent application FR-A-2,549,593.
  • 1 designates a water box of a main heat exchanger, for example the water box of a radiator for cooling the coolant of a heat engine, this water box being intended to be assembled to a collecting plate 2 into which flow tubes 3 open.
  • the water box 1 internally contains a secondary heat exchanger generally designated by 4.
  • the latter is intended to allow the cooling of a fluid different from that circulating through the tubes 3, for example the cooling of the oil.
  • a gearbox for example the gearbox.
  • the secondary heat exchanger 4 is, in the example, constituted by a stack of half-blades 5, 6, which are brazed together and which delimit at their ends elementary collecting chambers 7 which communicate with each other and with a distributor tube 8 forming at the same time drawing.
  • the free end of this tube is engaged and brazed in a groove 10 of a support plate 11 in which two grooves 12 respectively 13 are provided.
  • the secondary heat exchanger 4 is provided with two support plates 11 respectively 11a which have threads 14 coaxial with the geometric axes 15 of holes 16 provided in one of the side walls of the water box.
  • the grooves 12 and 13 are intended to contain annular seals 17 and 18.
  • connection pipes 19 are provided, having a threaded part 20 which is screwed into the thread 14 of the corresponding support plate 11.
  • Each tube has a crown 21 which comes to bear against the seal 12 of the corresponding support plate to ensure sealing.
  • the connection pipe has a second thread 22 on which is screwed a nut 23 tightened against the external wall of the water box, to compress the seal. 18 against the internal what of this water box ensuring sealing.
  • the secondary heat exchanger 4 is first placed inside the water box 1 so that the threads 14 of the support plates are aligned with the holes 16 in the box with water, the two connection pipes 19 are then screwed through their threaded part into the threads 14 and then the nuts 23 are screwed onto the threads 22.
  • a water box 30 of a main heat exchanger for example of a radiator for cooling a heat engine.
  • the water box 30 comprises two opposite side walls 32, 34 and two other opposite side walls 36 and 38, which are connected to a bottom wall 40.
  • the four walls 32, 34, 36 and 38 together define an open face delimited by an edge 42 of rectangular outline serving, in a manner known per se, for assembling the water box on a collector (not shown).
  • the water box 30 internally contains a secondary heat exchanger designated as a whole by 44.
  • the latter is intended to allow the cooling of a fluid different from that which circulates in the water box 30, for example the cooling of a gearbox oil.
  • the secondary heat exchanger 44 is, in the example, constituted by a stack of half-blades 46 and 48 which together constitute the body 50 of the heat exchanger 44.
  • the latter comprises two distributor tubes 52 forming a tie, the free ends are connected to two rings 54 in the form of rings, coaxial with two distributor tubes 52, each of the flanges being connected to the body 50 of the heat exchanger by means of a cylindrical part 56, also in the form of a ring, of smaller diameter than the flange 54.
  • Each of the tubes 52 in combination with the collar 54 and the associated cylindrical part 56, internally define a housing (not shown) suitable for receiving a connection tube 58 attached from the outside.
  • One of the pipes is used for the inlet of the fluid circulating in the secondary heat exchanger 44 and the other for the outlet of the same fluid.
  • Each of the pipes 58 is first introduced through a passage orifice 60 formed in the wall 32 of the water box and then in the corresponding receiving housing.
  • the wall 32 is provided, inside the water box, with two slides 62 located respectively in the region of the two orifices 60. These two slides are suitable for receiving respectively the flanges 54, forming a slide, to allow movement in translation of the secondary heat exchanger 44 along the wall 32 as far as a stop position where the two orifices 60 are aligned respectively with the two receiving housings of the secondary heat exchanger 44.
  • Each of the slides 62 comprises a wall 64 of generally rectangular shape which extends parallel to the wall 32 and which is separated from the latter by a distance slightly greater than the thickness of the collar 54 (FIG. 2).
  • Each flange has two opposite annular faces: a face 66 adapted to bear against the internal face of the wall 32 and a face 68 adapted to bear against the internal face of the wall 64.
  • the latter comprises a notch 70 limited by two substantially parallel edges 72 and 74, arranged opposite and defining the direction of translation of the slide.
  • the edges 72 and 74 are separated by a distance substantially equal to the external diameter of the cylindrical wall 56 for its guidance in the direction of translation.
  • the edges 72 and 74 are joined together by an edge 76 in a semicircle whose diameter is substantially equal to the diameter of the cylindrical part 56 and whose center is aligned with the center of the passage orifice 60 which is associated with it .
  • the notch 70 thus has an open end directed towards the side of the open face of the water box and a closed end directed towards the side of the bottom 40 of the water box. This closed end limited by the edge 76 forms a stop when the corresponding flange 56 is introduced.
  • each slide is connected to the wall 32 of the water box by two parallel connecting edges 78 and 80 separated by a sufficient distance to allow passage to the flange 54 which thus forms a slide capable of sliding in this slide .
  • this wall 64 is directly connected to the bottom wall 40 of the water box.
  • the water box is formed from a plastic material and the two slides have also been molded therewith.
  • the attachment of the two connecting pipes with the secondary heat exchanger 44 can be done for example by screwing as described in the document FR-A-2 549 593 already cited.
  • a water box comprising two slides suitable for receiving two slides
  • a water box could be designed comprising a single slide suitable for receiving a single slide provided on the body of the exchanger secondary heat.
  • the secondary heat exchanger contained in the water box is not necessarily a blade type exchanger as previously described. It could be constituted by a heat exchanger of another type, in particular by a multitubular exchanger.

Description

L'invention concerne une boîte à eau d'un échangeur de chaleur principal telle que définie dans le préambule de la revendication 1 et connue, par exemple, de la demande de brevet FR-A-2 549 593.The invention relates to a water box of a main heat exchanger as defined in the preamble of claim 1 and known, for example, from patent application FR-A-2,549,593.

Dans les dispositifs connus de ce genre, l'échangeur de chaleur principal est parcouru par un premier fluide tandis que l'échangeur de chaleur secondaire est parcouru par un second fluide qui est refroidi par le premier fluide.In known devices of this kind, the main heat exchanger is traversed by a first fluid while the secondary heat exchanger is traversed by a second fluid which is cooled by the first fluid.

Dans l'application particulière aux véhicules automobiles, le premier fluide est le liquide de refroidissement d'un moteur thermique, tandis que le second fluide peut être une huile de lubrification d'un moteur thermique, une huile de boîte de vitesses ou une huile d'un convertisseur de couple. Ainsi, le liquide de refroidissement assure non seulement sa fonction habituelle de refroidissement du moteur, mais aussi une fonction supplémentaire de refroidissement d'un fluide lié au fonctionnement du véhicule.In the specific application to motor vehicles, the first fluid is the coolant of a heat engine, while the second fluid can be a lubricating oil of a heat engine, a gearbox oil or an engine oil. 'a torque converter. Thus, the coolant not only performs its usual function of cooling the engine, but also an additional function of cooling a fluid linked to the operation of the vehicle.

Dans les dispositifs connus de ce genre, l'échangeur de chaleur secondaire est introduit par une face ouverte de la boîte à eau et cette dernière est ensuite raccordée au corps ou au faisceau de l'échangeur de chaleur principal. L'échangeur de chaleur secondaire comprend deux tubulures de raccordement, servant respectivement à l'entrée et à la sortie du second fluide, qui traversent à étanchéité deux orifices d'une paroi de la boîte à eau et qui servent à la fixation et au maintien de l'échangeur de chaleur secondaire à l'intérieur de la boîte à eau.In known devices of this kind, the secondary heat exchanger is introduced through an open face of the water box and the latter is then connected to the body or to the bundle of the main heat exchanger. The secondary heat exchanger comprises two connecting pipes, respectively serving for the inlet and the outlet of the second fluid, which seal through two orifices of a wall of the water box and which serve for fixing and holding of the secondary heat exchanger inside the water box.

Dans le dispositif connu du document FR-A-2 549 593, les deux tubulures de raccordement sont rapportées sur l'échangeur de chaleur secondaire après mise en place de ce dernier à l'intérieur de la boîte à eau. Chacune des deux tubulures de raccordement est alors introduite, à partir de l'extérieur de la boîte à eau, successivement à travers un des orifices précités de la paroi et dans un logement de réception approprié que comporte le second échangeur de chaleur.In the device known from document FR-A-2 549 593, the two connecting pipes are attached to the secondary heat exchanger after the latter has been placed inside the water box. Each of the two connecting pipes is then introduced, from the outside of the water box, successively through one of the aforementioned orifices of the wall and into an appropriate receiving housing which the second heat exchanger includes.

Cette solution a pour avantage qu'elle permet d'utiliser un échangeur de chaleur secondaire dont les dimensions externes correspondent sensiblement aux dimensions internes de la boîte à eau, ce qui permet d'améliorer l'efficacité de l'échangeur de chaleur secondaire, tout en utilisant une boîte à eau de taille standard.This solution has the advantage that it allows the use of a secondary heat exchanger whose external dimensions correspond substantially to the internal dimensions of the water box, which improves the efficiency of the secondary heat exchanger, while using a standard size water box.

Cette solution a cependant pour inconvénient que l'échangeur de chaleur secondaire doit être positionné d'une manière extrêmement précise à l'intérieur de la boîte à eau pour que les deux orifices de la paroi de cette dernière soient rigoureusement alignés avec les deux logements de réception de l'échangeur de chaleur secondaire afin de permettre de rapporter ensuite les deux tubulures. Ce maintien en position doit être effectué avant et pendant l'opération de mise en place des deux tubulures.However, this solution has the disadvantage that the secondary heat exchanger must be positioned in an extremely precise manner inside the water box so that the two orifices in the wall of the latter are rigorously aligned with the two housing of reception of the secondary heat exchanger in order to allow the two pipes to then be attached. This holding in position must be carried out before and during the operation of fitting the two pipes.

L'invention a notamment pour but de surmonter cet inconvénient.The object of the invention is in particular to overcome this drawback.

Ce but est atteint grâce aux caractéristiques mentionnées dans la partie caractérisante de la revendication 1.This object is achieved thanks to the characteristics mentioned in the characterizing part of claim 1.

Ainsi, on est assuré que l'échangeur de chaleur secondaire est positionné de manière précise à l'intérieur de la boîte à eau, en vue de la mise en place des deux tubulures de raccordement.Thus, it is ensured that the secondary heat exchanger is precisely positioned inside the water box, for the establishment of the two connecting pipes.

Dans une forme de réalisation préférée de l'invention, la boîte à eau comprend deux glissières propres à récevoir respectivement deux coulisseaux solidaires de l'échangeur de chaleur secondaire.In a preferred embodiment of the invention, the water box comprises two slides suitable for receiving respectively two slides integral with the secondary heat exchanger.

Ces deux coulisseaux sont avantageusement constitués par deux collerettes coaxiales aux deux logements de réception de l'échangeur de chaleur secondaire.These two slides are advantageously constituted by two coaxial flanges to the two housing for receiving the secondary heat exchanger.

De préférence, chacune des collerettes présente deux faces annulaires opposées dont l'une est propre à venir en appui contre la paroi de la boîte à eau et l'autre contre une paroi de la glissière qui est séparée de la paroi de la boîte à eau d'une distance un peu supérieure à l'épaisseur de la collerette.Preferably, each of the flanges has two opposite annular faces, one of which is capable of coming into abutment against the wall of the water box and the other against a wall of the slide which is separated from the wall of the water box. from a distance slightly greater than the thickness of the collar.

Avantageusement, la collerette est rattachée au corps de l'échangeur de chaleur secondaire par une partie cylindrique de diamètre plus faible que celui de la collerette, la paroi de la glissière comporte une échancrure limitée par deux bords parallèles en vis-à-vis définissant la direction en translation et qui sont séparés d'une distance sensiblement égale au diamètre externe de la partie cylindrique, l'échancrure étant ouverte à une extrémité pour permettre l'introduction de la collerette et étant fermée à son autre extrémité pour former une butée.Advantageously, the flange is attached to the body of the secondary heat exchanger by a cylindrical part of smaller diameter than that of the flange, the wall of the slide has a notch limited by two parallel edges opposite defining the direction in translation and which are separated by a distance substantially equal to the external diameter of the cylindrical part, the notch being open at one end to allow the introduction of the flange and being closed at its other end to form a stop.

Cette dernière est avantageusement formée par un bord en demi-cercle qui relie les deux bords parallèles de l'échancrure, dont le diamètre est sensiblement égal au diamètre de la partie cylindrique et dont le centre est aligné avec le centre d'un orifice de passage.The latter is advantageously formed by a semi-circular edge which connects the two parallel edges of the notch, the diameter of which is substantially equal to the diameter of the cylindrical part and the center of which is aligned with the center of a passage orifice. .

Ainsi, lorsque l'échangeur de chaleur secondaire est en butée dans les deux glissières, les deux orifices de passage de la paroi sont rigoureusement alignés avec les deux logements de réception de l'échangeur de chaleur secondaire.Thus, when the secondary heat exchanger is in abutment in the two slides, the two orifices for passage of the wall are rigorously aligned with the two receptacles for receiving the secondary heat exchanger.

Il suffit alors de rapporter les deux tubulures de raccordement en les solidarisant à l'échangeur de chaleur secondaire par tout moyen approprié, par exemple par vissage ou encore par sertissage.It then suffices to attach the two connecting pipes by securing them to the secondary heat exchanger by any appropriate means, for example by screwing or by crimping.

Dans la description qui suit, faite seulement à titre d'exemple, on se réfère aux dessins annexés, sur lesquels:

  • Figure 1 est une demi-coupe en élévation d'une boîte à eau d'échangeur de chaleur principal contenant un échangeur de chaleur secondaire, conformément à la technique antérieure;
  • la Figure 2 est une vue de dessus, par sa face ouverte, d'une boîte à eau d'échangeur de chaleur principal contenant un échangeur de chaleur secondaire selon l'invention; et
  • la Figure 3 est une vue en coupe suivant la ligne III-III de la Figure 2.
In the following description, made only as example, reference is made to the accompanying drawings, in which:
  • Figure 1 is a half section in elevation of a main heat exchanger water box containing a secondary heat exchanger, according to the prior art;
  • Figure 2 is a top view, through its open face, of a main heat exchanger water box containing a secondary heat exchanger according to the invention; and
  • Figure 3 is a sectional view along line III-III of Figure 2.

On se réfère tout d'abord à la Fig. 1 qui montre un dispositif connu d'après la demande de brevet FR-A-2 549 593 .We first refer to FIG. 1 which shows a device known from patent application FR-A-2,549,593.

Sur cette Figure, 1 désigne une boîte à eau d'un échangeur de chaleur principal, par exemple la boîte à eau d'un radiateur de refroidissement du liquide de refroidissement d'un moteur thermique, cette boîte à eau étant destinée à être assemblée à une plaque collectrice 2 dans laquelle débouchent des tubes de circulation 3.In this Figure, 1 designates a water box of a main heat exchanger, for example the water box of a radiator for cooling the coolant of a heat engine, this water box being intended to be assembled to a collecting plate 2 into which flow tubes 3 open.

La boîte à eau 1 contient intérieurement un échangeur de chaleur secondaire désigné dans son ensemble par 4. Ce dernier est destiné à permettre le refroidissement d'un fluide différent de celui circulant par les tubes 3, par exemple le refroidissement de l'huile d'une boîte de vitesses.The water box 1 internally contains a secondary heat exchanger generally designated by 4. The latter is intended to allow the cooling of a fluid different from that circulating through the tubes 3, for example the cooling of the oil. a gearbox.

L'échangeur de chaleur secondaire 4 est, dans l'exemple, constitué par un empilage de demi-lames 5, 6, qui sont brasées entre elles et qui délimitent à leurs extrémités des chambres collectrices élémentaires 7 qui communiquent entre elles et avec un tube distributeur 8 formant en même temps tirant. L'extrémité libre de ce tube est engagée et brasée dans une rainure 10 d'une plaque d'appui 11 dans laquelle sont prévues deux rainures 12 respectivement 13.The secondary heat exchanger 4 is, in the example, constituted by a stack of half-blades 5, 6, which are brazed together and which delimit at their ends elementary collecting chambers 7 which communicate with each other and with a distributor tube 8 forming at the same time drawing. The free end of this tube is engaged and brazed in a groove 10 of a support plate 11 in which two grooves 12 respectively 13 are provided.

L'échangeur de chaleur secondaire 4 est muni de deux plaques d'appui 11 respectivement 11a qui présentent des taraudages 14 coaxiaux aux axes géométriques 15 de trous 16 prévus dans l'une des parois latérales de la boîte à eau. Les rainures 12 et 13 sont destinées à contenir des joints annulaires 17 et 18.The secondary heat exchanger 4 is provided with two support plates 11 respectively 11a which have threads 14 coaxial with the geometric axes 15 of holes 16 provided in one of the side walls of the water box. The grooves 12 and 13 are intended to contain annular seals 17 and 18.

Pour permettre la fixation de l'échangeur de chaleur secondaire 4 à la boîte à eau 1, il est prévu des tubulures de raccordement 19 présentant une partie filetée 20 qui est vissée dans le taraudage 14 de la plaque d'appui correspondante11. Chaque tubulure comporte une couronne 21 venant prendre appui contre le joint 12 de la plaque d'appui correspondante pour assurer l'étanchéité. Au-delà de la couronne 21, la tubulure de raccordement présente un second filetage 22 sur lequel est vissé un écrou 23 serré contre la paroi externe de la boîte à eau, pour comprimer le joint. 18 contre la quoi interne de cette boîte à eau en assurant l'étanchéité.To allow the attachment of the secondary heat exchanger 4 to the water box 1, connection pipes 19 are provided, having a threaded part 20 which is screwed into the thread 14 of the corresponding support plate 11. Each tube has a crown 21 which comes to bear against the seal 12 of the corresponding support plate to ensure sealing. Beyond the crown 21, the connection pipe has a second thread 22 on which is screwed a nut 23 tightened against the external wall of the water box, to compress the seal. 18 against the internal what of this water box ensuring sealing.

Ainsi, conformément à cette technique antérieure, on place d'abord l'échangeur de chaleur secondaire 4 à l'intérieur de la boîte à eau 1 de manière que les taraudages 14 des plaques d'appui soient alignés avec les trous 16 de la boîte à eau, on visse ensuite les deux tubulures de raccordement 19, par leur partie filetée, dans les taraudages 14 et ensuite on visse les écrous 23 sur les filetages 22.Thus, in accordance with this prior technique, the secondary heat exchanger 4 is first placed inside the water box 1 so that the threads 14 of the support plates are aligned with the holes 16 in the box with water, the two connection pipes 19 are then screwed through their threaded part into the threads 14 and then the nuts 23 are screwed onto the threads 22.

Comme indiqué précédemment, cette solution connue présente des inconvénients en ce sens que le positionnement précis de l'échangeur de chaleur secondaire 4 à l'intérieur de la boîte à eau 1 est difficile à réaliser, et cela d'autant plus que les dimensions externes de l'échangeur de chaleur secondaire 4 sont très proches des dimensions internes de la boîte à eau 1.As indicated previously, this known solution has drawbacks in that the precise positioning of the secondary heat exchanger 4 inside the water box 1 is difficult to achieve, and this all the more so as the external dimensions of the secondary heat exchanger 4 are very close to the internal dimensions of the water box 1.

L'invention permet d'éviter cet inconvénient, comme on le verra à l'examen des Figures 2 et 3.The invention makes it possible to avoid this drawback, as will be seen on examining Figures 2 and 3.

Sur ces Figures, on a représenté une boîte à eau 30 d'un échangeur de chaleur principal, par exemple d'un radiateur de refroidissement d'un moteur thermique. La boîte à eau 30 comprend deux parois latérales opposées 32, 34 et deux autres parois latérales opposées 36 et 38, lesquelles se raccordent sur une paroi de fond 40. Les quatre parois 32, 34, 36 et 38 définissent ensemble une face ouverte délimitée par un bord 42 de contour rectangulaire servant, de manière en soi connue, à l'assemblage de la boîte à eau sur un collecteur (non représenté).In these Figures, there is shown a water box 30 of a main heat exchanger, for example of a radiator for cooling a heat engine. The water box 30 comprises two opposite side walls 32, 34 and two other opposite side walls 36 and 38, which are connected to a bottom wall 40. The four walls 32, 34, 36 and 38 together define an open face delimited by an edge 42 of rectangular outline serving, in a manner known per se, for assembling the water box on a collector (not shown).

La boîte à eau 30 contient intérieurement un échangeur de chaleur secondaire désigné dans son ensemble par 44. Ce dernier est destiné à permettre le refroidissement d'un fluide différent de celui qui circule dans la boîte à eau 30, par exemple le refroidissement d'une huile de boîte de vitesses.The water box 30 internally contains a secondary heat exchanger designated as a whole by 44. The latter is intended to allow the cooling of a fluid different from that which circulates in the water box 30, for example the cooling of a gearbox oil.

L'échangeur de chaleur secondaire 44 est, dans l'exemple, constitué par un empilage de demi-lames 46 et 48 qui constituent ensemble le corps 50 de l'échangeur de chaleur 44. Ce dernier comprend deux tubes distributeurs 52 formant tirant dont les extrémités libres sont reliées à deux collerettes 54 en forme d'anneaux, coaxiales aux deux tubes distributeurs 52, chacune des collerettes étant reliée au corps 50 de l'échangeur de chaleur par l'intermédiaire d'une partie cylindrique 56, également en forme d'anneau, de diamètre plus faible que la collerette 54. Chacun des tubes 52, en combinaison avec la collerette 54 et la partie cylindrique 56 associée, définissent intérieurement un logement (non représenté) propre à recevoir une tubulure de raccordement 58 rapportée de l'extérieur. Une des tubulures sert à l'entrée du fluide circulant dans l'échangeur de chaleur secondaire 44 et l'autre à la sortie du même fluide.The secondary heat exchanger 44 is, in the example, constituted by a stack of half-blades 46 and 48 which together constitute the body 50 of the heat exchanger 44. The latter comprises two distributor tubes 52 forming a tie, the free ends are connected to two rings 54 in the form of rings, coaxial with two distributor tubes 52, each of the flanges being connected to the body 50 of the heat exchanger by means of a cylindrical part 56, also in the form of a ring, of smaller diameter than the flange 54. Each of the tubes 52 , in combination with the collar 54 and the associated cylindrical part 56, internally define a housing (not shown) suitable for receiving a connection tube 58 attached from the outside. One of the pipes is used for the inlet of the fluid circulating in the secondary heat exchanger 44 and the other for the outlet of the same fluid.

Chacune des tubulures 58 est introduite d'abord à travers un orifice de passage 60 menagé dans la paroi 32 de la boîte à eau et ensuite dans le logement de réception correspondant.Each of the pipes 58 is first introduced through a passage orifice 60 formed in the wall 32 of the water box and then in the corresponding receiving housing.

La paroi 32 est munie, à l'intérieur de la boîte à eau, de deux glissières 62 situées respectivement dans la région des deux orifices 60. Ces deux glissières sont propres à recevoir respectivement les collerettes 54, formant coulisseau, pour permettre le déplacement en translation de l'échangeur de chaleur secondaire 44 le long de la paroi 32 jusqu'en une position de butée où les deux orifices 60 sont alignés respectivement avec les deux logements de réception de l'échangeur de chaleur secondaire 44.The wall 32 is provided, inside the water box, with two slides 62 located respectively in the region of the two orifices 60. These two slides are suitable for receiving respectively the flanges 54, forming a slide, to allow movement in translation of the secondary heat exchanger 44 along the wall 32 as far as a stop position where the two orifices 60 are aligned respectively with the two receiving housings of the secondary heat exchanger 44.

Chacune des glissières 62 comprend une paroi 64 de forme générale rectangulaire qui s'étend parallèlement à la paroi 32 et qui est séparée de cette dernière par une distance légèrement supérieure à l'épaisseur de la collerette 54 (Fig. 2). Chaque collerette présente deux faces annulaires opposées : une face 66 propre à prendre appui contre la face interne de la paroi 32 et une face 68 propre à prendre appui contre la face interne de la paroi 64. Cette dernière comprend une échancrure 70 limitée par deux bords sensiblement parallèles 72 et 74, disposés en vis-à-vis et définissant la direction de translation de la glissière. Les bords 72 et 74 sont séparés d'une distance sensiblement égale au diamètre externe de la paroi cylindrique 56 en vue de son guidage dans la direction de translation. Les bords 72 et 74 sont réunis entre eux par un bord 76 en demi-cercle dont le diamètre est sensiblement égal au diamètre de la partie cylindrique 56 et dont le centre est aligné avec le centre de l'orifice de passage 60 qui lui est associé.Each of the slides 62 comprises a wall 64 of generally rectangular shape which extends parallel to the wall 32 and which is separated from the latter by a distance slightly greater than the thickness of the collar 54 (FIG. 2). Each flange has two opposite annular faces: a face 66 adapted to bear against the internal face of the wall 32 and a face 68 adapted to bear against the internal face of the wall 64. The latter comprises a notch 70 limited by two substantially parallel edges 72 and 74, arranged opposite and defining the direction of translation of the slide. The edges 72 and 74 are separated by a distance substantially equal to the external diameter of the cylindrical wall 56 for its guidance in the direction of translation. The edges 72 and 74 are joined together by an edge 76 in a semicircle whose diameter is substantially equal to the diameter of the cylindrical part 56 and whose center is aligned with the center of the passage orifice 60 which is associated with it .

L'échancrure 70 présente ainsi une extrémité ouverte dirigée du côté de la face ouverte de la boîte à eau et une extrémité fermée dirigée du côté du fond 40 de la boîte à eau. Cette extrémité fermée limitée par le bord 76 forme butée lors de l'introduction de la collerette 56 correspondante.The notch 70 thus has an open end directed towards the side of the open face of the water box and a closed end directed towards the side of the bottom 40 of the water box. This closed end limited by the edge 76 forms a stop when the corresponding flange 56 is introduced.

La paroi 64 de chaque glissière est reliée à la paroi 32 de la boîte à eau par deux bords de liaison parallèles 78 et 80 séparés d'une distance suffisante pour livrer passage à la collerette 54 qui forme ainsi un coulisseau apte à glisser dans cette glissière. D'autre part, cette paroi 64 est reliée directement à la paroi de fond 40 de la boîte à eau.The wall 64 of each slide is connected to the wall 32 of the water box by two parallel connecting edges 78 and 80 separated by a sufficient distance to allow passage to the flange 54 which thus forms a slide capable of sliding in this slide . On the other hand, this wall 64 is directly connected to the bottom wall 40 of the water box.

Avantageusement, la boîte à eau est formée à partir d' une matière plastique et les deux glissières sont également venues de moulage avec celle-ci.Advantageously, the water box is formed from a plastic material and the two slides have also been molded therewith.

Pour mettre en place l'échangeur de chaleur secondaire 44 à l'intérieur de la boîte à eau 30, il suffit de présenter les deux collerettes 54 en regard des extrémités libres des glissières tout en appliquant les faces annulaires 66 des deux collerettes contre la face interne de la paroi 32. Il suffit ensuite de déplacer en translation l'échangeur de chaleur secondaire 44 parallèlement à à la paroi 32 de manière que chacune des parties cylindriques 56 vienne en butée contre le bord 76 en demi-cercle de la glissière. Dans la position de butée, les deux logements de réception de l'échangeur de chaleur secondaire 44 sont alignés respectivement avec les orifices 60 de la boîte à eau. Il suffit alors de rapporter les deux tubulures 58 en introduisant chacune d'elles successivement dans l'orifice 60 et dans le logement de réception créception correspondant de l'échangeur de l'échangeur de chaleur 44.To set up the secondary heat exchanger 44 inside the water box 30, it suffices to present the two flanges 54 opposite the free ends of the slides while applying the annular faces 66 of the two flanges against the face internal of the wall 32. It then suffices to move in translation the secondary heat exchanger 44 parallel to the wall 32 so that each of the cylindrical parts 56 abuts against the edge 76 in a semicircle of the slide. In the stop position, the two receiving housings of the secondary heat exchanger 44 are aligned respectively with the orifices 60 of the water box. It then suffices to attach the two pipes 58 by introducing each of them successively into the orifice 60 and into the corresponding creece reception housing of the exchanger of the heat exchanger 44.

La solidarisation des deux tubulures de raccordement avec l'échangeur de chaleur secondaire 44 peut se faire par exemple par vissage comme décrit dans le document FR-A-2 549 593 déjà cité.The attachment of the two connecting pipes with the secondary heat exchanger 44 can be done for example by screwing as described in the document FR-A-2 549 593 already cited.

Bien que l'invention ait été décrite en référence particulière à une boîte à eau comportant deux glissières propres à recevoir deux coulisseaux, on pourrait concevoir une boîte à eau comportant une seule glissière propre à recevoir un seul coulisseau prévu sur le corps de l'échangeur de chaleur secondaire.Although the invention has been described with particular reference to a water box comprising two slides suitable for receiving two slides, a water box could be designed comprising a single slide suitable for receiving a single slide provided on the body of the exchanger secondary heat.

L'échangeur de chaleur secondaire contenu dans la boîte à eau n'est pas nécessairement un échangeur du type à lames comme décrit prédédemment. Il pourrait être constitué par un échangeur de chaleur d'un autre type, en particulier par un échangeur multitubulaire.The secondary heat exchanger contained in the water box is not necessarily a blade type exchanger as previously described. It could be constituted by a heat exchanger of another type, in particular by a multitubular exchanger.

Claims (9)

  1. A water header for a main heat exchanger, containing a secondary heat exchanger (44) having two coupling tubes (58) which extend sealingly through a wall (32) of the water header (30), and through which the secondary heat exchanger is secured in the water header, each of the coupling tubes (58) being fitted on the secondary heat exchanger (44) by being introduced successively into an access orifice (60) formed in the wall (32) of the water header, and into a reception seating formed in the secondary heat exchanger (44), characterised in that the said wall (32) is provided, within the water header (30) and in the region of the two orifices (60), with at least one slide (62) which is adapted to receive a sliding element (54), which forms part of the secondary heat exchanger (44), and to permit the displacement of the secondary heat exchanger (44) in translational movement along the wall (32) of the water header up to an abutment position in which both orifices (60) of the wall (32) are aligned respectively with the two reception seatings.
  2. A water header according to Claim 1, characterised in that it includes two slides (62), which are adapted to receive, respectively, two sliding elements (54) which are fixed to the secondary heat exchanger (44).
  3. A water header according to Claim 2, characterised in that the two sliding elements comprise two collars (54) which are coaxial with the two reception seatings of the secondary heat exchanger (44).
  4. A water header according to Claim 3, characterised in that each of the collars (54) has two opposed annular faces, one of which (66) is adapted to come into abutting engagement against the wall (32) of the water header, while the other (68) is adapted to come into abutting engagement against a wall (64) of the slide, which extends parallel to the wall (32) of the water header and which is separated from the latter by a distance slightly greater than the thickness of the collar.
  5. A water header according to Claim 4, characterised in that each of the collars (54) is attached to the body of the secondary heat exchanger (44) by means of a cylindrical portion (56) having a diameter smaller than that of the collar, and in that the wall (64) of the slide (62) has a slot (70) bounded by two parallel edges (72, 74), which face towards each other and which define the direction of the translational movement, being separated by a distance which is substantially equal to the outer diameter of the cylindrical portion (56), the slot being open at one end so as to enable the collar (54) to be introduced, and closed at its other end so as to constitute an abutment (76).
  6. A water header according to Claim 5, characterised in that the abutment is defined by a semicircular edge (76) which joins the two parallel edges (72 and 74) of the slot (70) together, and which has a diameter substantially equal to the diameter of the cylindrical portion (56), with its centre being aligned with the centre of an access orifice (60).
  7. A water header according to Claim 5 or Claim 6 including an open face, characterised in that the open end of the slot (70) is orientated towards the said open face.
  8. A water header according to one of Claims 4 to 7, characterised in that the wall (64) of each slide (62) is joined to the wall (32) of the water header (30) through two parallel connecting edges (78, 80), and is connected to a base wall (40) of the water header.
  9. A water header according to one of Claims 1 to 8, characterised in that the or each slide (62) is moulded integrally with the water header.
EP91402076A 1990-07-31 1991-07-25 Header of a main heat exchanger, in particular for motor vehicles, containing a second heat exchanger Expired - Lifetime EP0473474B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9009766A FR2665523B1 (en) 1990-07-31 1990-07-31 WATER BOX OF A MAIN HEAT EXCHANGER, PARTICULARLY FOR MOTOR VEHICLES, CONTAINING A SECONDARY HEAT EXCHANGER.
FR9009766 1990-07-31

Publications (2)

Publication Number Publication Date
EP0473474A1 EP0473474A1 (en) 1992-03-04
EP0473474B1 true EP0473474B1 (en) 1994-03-09

Family

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Application Number Title Priority Date Filing Date
EP91402076A Expired - Lifetime EP0473474B1 (en) 1990-07-31 1991-07-25 Header of a main heat exchanger, in particular for motor vehicles, containing a second heat exchanger

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US (1) US5113930A (en)
EP (1) EP0473474B1 (en)
DE (1) DE69101353T2 (en)
ES (1) ES2054462T3 (en)
FR (1) FR2665523B1 (en)

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Also Published As

Publication number Publication date
DE69101353T2 (en) 1994-06-16
FR2665523A1 (en) 1992-02-07
EP0473474A1 (en) 1992-03-04
FR2665523B1 (en) 1992-10-16
ES2054462T3 (en) 1994-08-01
US5113930A (en) 1992-05-19
DE69101353D1 (en) 1994-04-14

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