EP0624772A1 - Heat-exchanger for motor vehicle - Google Patents

Heat-exchanger for motor vehicle Download PDF

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Publication number
EP0624772A1
EP0624772A1 EP94107180A EP94107180A EP0624772A1 EP 0624772 A1 EP0624772 A1 EP 0624772A1 EP 94107180 A EP94107180 A EP 94107180A EP 94107180 A EP94107180 A EP 94107180A EP 0624772 A1 EP0624772 A1 EP 0624772A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
manifold
tubes
exchanger according
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94107180A
Other languages
German (de)
French (fr)
Other versions
EP0624772B1 (en
Inventor
Michel Potier
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
Publication of EP0624772A1 publication Critical patent/EP0624772A1/en
Application granted granted Critical
Publication of EP0624772B1 publication Critical patent/EP0624772B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/165—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • 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
    • F28D1/053—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 the conduits being straight
    • F28D1/0535—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 the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • F28F9/0226—Header boxes formed by sealing end plates into covers with resilient gaskets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/32—Safety or protection arrangements; Arrangements for preventing malfunction for limiting movements, e.g. stops, locking means
    • 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
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
    • Y10S165/471—Plural parallel conduits joined by manifold
    • Y10S165/477—Elastic seal element between conduit ends and receiving holes in header plate
    • 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
    • Y10S165/906—Reinforcement

Definitions

  • the invention relates to a heat exchanger, in particular for a motor vehicle.
  • a heat exchanger of the type comprising a collecting plate provided with substantially circular holes as well as a bundle of tubes provided with fins, in which each tube has an end of suitable shape, received in sealing in a hole in the collector plate.
  • substantially circular is meant to specify that the holes in the collector plate and the sections of the ends of the tubes have a circular shape or else a shape which may be an oval or elliptical shape determined by a major axis and a minor axis of symmetry.
  • the seal between each end of the tubes and the collector plate is most often provided by an elastomer seal comprising compressible collars, each of which is compressed between the end of the tube and a collar bordering the corresponding hole in the collector plate.
  • each end of the tube can be provided with a flaring obtained by deformation of the wall of the tube, this deformation having the function of ensuring the retention of the collector plate on the bundle of finned tubes. and to contribute to the seal between the tube and the collector plate.
  • a fluid collecting box is able to be attached to one of the ends of the bundle of finned tubes thus formed and more particularly to the collecting plate so as to form a heat exchanger.
  • This phenomenon results in a loss of sealing between the end of the tubes concerned and the holes and, in extreme cases, a deterioration of the seal provided between the end of the tube and the hole.
  • the present invention proposes to remedy the aforementioned drawbacks.
  • a heat exchanger in particular for a motor vehicle, comprising a bundle of tubes provided with fins in which the ends of the tubes are sealingly mounted in the holes of a manifold plate on which is mounted a manifold is characterized in that abutment means are provided between the manifold and at least one end of the tubes by resting on said end.
  • the displacement of the whole of the tube concerned is limited or even prevented by the stop means.
  • the stop means consist of a finger from the manifold.
  • the abutment means consist of a rib coming from the manifold box.
  • the stop means come from the top wall of the manifold.
  • the stop means come from at least one side wall of the manifold.
  • the means of abutment rest on the free edge of the tube end.
  • the stop means have a flat surface in contact with the end of the tube.
  • FIGS. 1 and 2 show a heat exchanger consisting of a bundle 2 formed of a multiplicity of tubes 4 of respective parallel axes XX being arranged in two parallel rows R1, R2.
  • the tubes pass through a multiplicity of fins 6 extending, here, perpendicularly to the axes XX of the tubes.
  • the ends 8 of the tubes 4 are able to be received with sealing in a collecting plate 10 which comprises a core 12 of generally rectangular shape, through which are formed, in correspondence of the ends 8 of the tubes 4, a multiplicity of holes 14 of shape corresponding to the shape of the ends 8 and of which each is bordered by a collar 16 extending from the directions of the fins 6.
  • the collector plate 10 has a peripheral rim 18 delimiting a peripheral groove 20 and forming a multiplicity of folding legs 22.
  • a compressible seal 24 On the face of the collector plate opposite the fins 6 is disposed a compressible seal 24, preferably made of an elastomeric material.
  • This seal comprises a core 26 applied against the core 12 of the collector plate and provided with compressible collars 28 capable of being compressed between a collar 16 of the collector plate 10 and the end 8 of the tube 4 by any suitable means, such as that a forced assembly of the end 8 in the collars 28 or by flaring said ends as is known per se.
  • the core 26 of the seal 24 is provided with a flange 30 received in the groove 20 and intended to be compressed by a peripheral edge 32 of a manifold 34.
  • the seal between the collector box 34 and the collector plate 10 is ensured by compression of the flange 30 after the tabs 22 that the collector plate has folded down.
  • the manifold 34 has a bowl shape, the open edge of which corresponds substantially to the arrangement of the peripheral edge 32 and has a bottom wall 36 opposite the open edge while being disposed substantially parallel to the manifold plate 10, this bottom wall coming from join the peripheral edge 32 by longitudinal side walls 38 and transverse side walls 40.
  • the manifold 34 further carries stop means 42 making it possible to limit, or even prohibit, the movement of the end 8 of the tubes 4 in the holes 14 of the manifold plate 10 and more particularly at the collars 28 of the joint. sealing 24, these abutment means being arranged in the vicinity of at least one end of the tube.
  • the abutment means consists of a finger 44 originating inside the manifold 34 and, more particularly in the case of this figure, from the internal face of the bottom wall 36 in order to reach the end edge 46 of the end 8 of the tube concerned, edge considered to be substantially perpendicular to the axis XX of the tube while being disposed at a distance from the bottom wall 36 of the manifold 34.
  • the free end 48 of the finger 44 which has a flat surface substantially parallel to the terminal edge 46, is supported on a localized region of the edge 46 so as not to hinder the circulation of the fluid in this tube, this finger being located in the vicinity of the end 8 but eccentrically with respect to the axis XX of the tube 4 while having most of its body outside the perimeter delimited by the edge 46.
  • the finger 44 can be replaced by a rib 50 coming from the longitudinal side wall 38 of the fluid box and coming to bear by its free edge 48 on a localized region of the edge 46 from the end 8 of the tubes 4, this rib extending in whole or in part along this side wall while being substantially parallel to the axis XX of the tube concerned and having a part terminal 52, opposite the wall 38, located at a distance from the axis XX of the tube 4.
  • the rib 50 can also come from the transverse lateral wall 40 of the manifold 34 and bear on a localized region of the edge 46 of the end 8 of the tube 4 relates.
  • a rib 50 can be provided associated with a tube 4 of each row R1, R2 of the bundle of finned tubes.
  • these abutment means constituted either by a finger or by a rib, disposed in the vicinity of the tubes concerned, these cannot be subjected to axial displacement along their axis XX and therefore will guarantee perfect sealing between the ends of these tubes and the header plate.
  • FIGS. 3 and 4 show an alternative embodiment of the invention and which, for this, will include the same references.
  • a finger 44 comes from the bottom wall 36 of the manifold 34 being located between two adjacent tubes 4 located in two rows R1, R2.
  • This finger as visible in FIG. 4, has a section of parallelepiped shape so that, at its free end 48, the short sides of the finger come to bear on the edges 46 of the ends 8 of two adjacent tubes .
  • This finger 44 can be connected to the transverse side wall 40 of the manifold by a veil 54 originating along a longitudinal edge of this finger to end at said transverse side wall.
  • a stop means is formed for two adjacent tubes.
  • the end 8 of the tubes 4 is mounted in sealing in the collecting plate 10 by deformation of this end, deformation obtained during a so-called flaring operation.
  • This flaring operation consists in increasing the section of the body 56 of the tube 4 at its junction with the collecting plate 10 so as to compress the collar 28 disposed between the outer wall of this end and the collar 16 of the collector plate, forming a first flare 58.
  • the seal is ensured between the end 8 of the tube 4 and the collector plate 10 and the tube 4 has a radial shoulder 60 located between the body 56 of the tube and the first vent 58.
  • This second flare 62 has the result of creating a second shoulder 64 disposed at a distance from the first shoulder 60 of the first flare 58 and being located between the first flare and the second flare.
  • the abutment means 42 are supported on the end 8 of the tube 4 coming into contact on a shoulder, either the shoulder 60 of the first flare 58, or the shoulder 64 of the second flare 62.
  • a finger 44 is provided from the bottom wall 36 of the manifold and the free end 48 of the finger penetrates either into the first flare 58 or into the second flare 62 by resting on said end. free on the affected shoulder.
  • the free end 48 of the finger 44 is supported on the second shoulder 64 of the second flaring 62 and has, in section, as can be seen in FIG. 6, a shape in which a substantially rectangular body 66 carries at each end a guide portion 68 of greater transverse thickness.
  • These guide portions comprise an outer cylindrical surface portion 70 whose diameter corresponds substantially to the diameter of the flare considered, here the flare 62, and two vertical walls 72 coming to join the body 66 of the finger 44.
  • the distance A considered between the portions of the cylindrical surfaces 70 corresponds substantially to the diameter of the portions of the end concerned by this flaring, here the flaring 62 and two vertical walls 72 coming to join the body 66 of the finger 44.
  • the distance A of the cylindrical surface portions corresponds substantially to the small dimension of the oval of the flare and the end free 48 carries an inclination bearing surface 74 corresponding to the inclination of the shoulder on which it presses and the thickness B of the body 66 is small enough to interfere as little as possible with the circulation of the fluid in the tube in question.
  • stop means for a tube and / or for two adjacent tubes of two different rows, and it can be envisaged to use these stop means for several tubes each comprising a stop means separate and / or for two adjacent tubes belonging to the same row of tubes.

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

Abstract

A heat exchanger comprises a bundle of tubes (4) fitted with fins (6), in which the ends (8) of the tubes (4) are mounted in a leaktight manner in the holes (14) of a manifold plate (10) on which a manifold box is mounted. End-stop means (44) are provided between the manifold box (34) and at least one end (8) of the tubes (4). <IMAGE>

Description

L'invention se rapporte à un échangeur de chaleur, notamment pour véhicule automobile.The invention relates to a heat exchanger, in particular for a motor vehicle.

Elle concerne plus particulièrement un échangeur de chaleur du type comprenant une plaque collectrice munie de trous sensiblement circulaires ainsi qu'un faisceau de tubes muni d'ailettes, dans lequel chaque tube comporte une extrémité de forme adaptée, reçue à étanchéité dans un trou de la plaque collectrice.It relates more particularly to a heat exchanger of the type comprising a collecting plate provided with substantially circular holes as well as a bundle of tubes provided with fins, in which each tube has an end of suitable shape, received in sealing in a hole in the collector plate.

Par l'expression "sensiblement circulaires" on entend préciser que les trous de la plaque collectrice et les sections des extrémités des tubes ont une forme circulaire ou bien une forme pouvant être une forme ovale ou elliptique déterminée par un grand axe et un petit axe de symétrie.By the expression "substantially circular" is meant to specify that the holes in the collector plate and the sections of the ends of the tubes have a circular shape or else a shape which may be an oval or elliptical shape determined by a major axis and a minor axis of symmetry.

Dans ce type d'échangeur de chaleur, l'étanchéité entre chaque extrémité de tubes et la plaque collectrice est le plus souvent assurée par un joint d'étanchéité en élastomère comportant des collets compressibles dont chacun est comprimé entre l'extrémité du tube et un collet bordant le trou correspondant de la plaque collectrice.In this type of heat exchanger, the seal between each end of the tubes and the collector plate is most often provided by an elastomer seal comprising compressible collars, each of which is compressed between the end of the tube and a collar bordering the corresponding hole in the collector plate.

Dans un échangeur de chaleur du type précité, chaque extrémité du tube peut être pourvue d'un évasement obtenu par déformation de la paroi du tube, cette déformation ayant pour fonction d'assurer la retenue de la plaque collectrice sur le faisceau de tubes à ailettes et de contribuer à l'étanchéité entre le tube et la plaque collectrice.In a heat exchanger of the aforementioned type, each end of the tube can be provided with a flaring obtained by deformation of the wall of the tube, this deformation having the function of ensuring the retention of the collector plate on the bundle of finned tubes. and to contribute to the seal between the tube and the collector plate.

En outre, une boîte collectrice de fluide est apte à être rapportée sur une des extrémités du faisceau de tubes à ailettes ainsi constitué et plus particulièrement sur la plaque collectrice de manière à former un échangeur de chaleur.In addition, a fluid collecting box is able to be attached to one of the ends of the bundle of finned tubes thus formed and more particularly to the collecting plate so as to form a heat exchanger.

Lors de l'utilisation dans des conditions extrêmes de ce type d'échangeur de chaleur, la Demanderesse a constaté qu'il se produisait un phénomène selon lequel une force dirigée dans la direction axiale des tubes avait tendance à faire déplacer certains des tubes par rapport au collecteur en les glisser dans les trous de la plaque collectrice.During the use in extreme conditions of this type of heat exchanger, the Applicant has observed that a phenomenon occurs whereby a force directed in the axial direction of the tubes tended to cause some of the tubes to move relative to the manifold by sliding them into the holes in the header plate.

Ce phénomène a pour conséquence d'entraîner une perte de l'étanchéité entre l'extrémité des tubes concernés et les trous et, dans les cas extrêmes, une détérioration du joint d'étanchéité prévu entre l'extrémité du tube et le trou.This phenomenon results in a loss of sealing between the end of the tubes concerned and the holes and, in extreme cases, a deterioration of the seal provided between the end of the tube and the hole.

La présente invention se propose de remédier aux inconvénients précités.The present invention proposes to remedy the aforementioned drawbacks.

Elle propose à cet effet un échangeur de chaleur, notamment pour véhicule automobile, comprenant un faisceau de tubes muni d'ailettes dans lequel les extrémités de tubes sont montées à étanchéité dans des trous d'une plaque collectrice sur laquelle est montée une boite collectrice est caractérisé en ce que des moyens de butée sont prévus entre la boîte collectrice et au moins une extrémité de tubes en s'appuyant sur ladite extrémité.To this end, it offers a heat exchanger, in particular for a motor vehicle, comprising a bundle of tubes provided with fins in which the ends of the tubes are sealingly mounted in the holes of a manifold plate on which is mounted a manifold is characterized in that abutment means are provided between the manifold and at least one end of the tubes by resting on said end.

Grâce à l'invention, le déplacement de l'ensemble du tube concerné est limité voire empêché par les moyens de butée.Thanks to the invention, the displacement of the whole of the tube concerned is limited or even prevented by the stop means.

Selon une autre caractéristique de l'invention, les moyens de butée consistent en un doigt issu de la boite collectrice.According to another characteristic of the invention, the stop means consist of a finger from the manifold.

Selon une autre caractéristique, les moyens de butée consistent en une nervure issue de la boite à collectrice.According to another characteristic, the abutment means consist of a rib coming from the manifold box.

Selon une autre caractéristique, les moyens de butée sont issus de la paroi de sommet de la boite collectrice.According to another characteristic, the stop means come from the top wall of the manifold.

Selon une autre caractéristique, les moyens de butée sont issus d'au moins une paroi latérale de la boîte collectrice.According to another characteristic, the stop means come from at least one side wall of the manifold.

Selon une autre caractéristique, les moyens de butée s'appuient sur le bord libre de l'extrémité de tubes.According to another characteristic, the means of abutment rest on the free edge of the tube end.

Selon une autre caractéristique, les moyens de butée présentent une surface plane en contact avec l'extrémité du tube.According to another characteristic, the stop means have a flat surface in contact with the end of the tube.

Les autres caractéristiques et avantages de l'invention vont ressortir maintenant de la description qui va suivre en se référant, à titre d'exemple, aux dessins annexés, sur lesquels :

  • la figure 1 est une vue partielle en coupe longitudinale selon la ligne I-I de la figure 2 et montrant un échangeur de chaleur selon une première forme de réalisation de l'invention ;
  • la figure 2 est une vue en coupe partielle selon la lige II-II de la figure 1 ;
  • la figure 3 est une vue partielle en coupe longitudinale selon la ligne III-III de la figure 4 et montrant un échangeur de chaleur selon une seconde forme de réalisation de l'invention ;
  • la figure 4 est une vue partielle en coupe selon la ligne IV-IV de la figure 3.
  • la figure 5 est une vue partielle en coupe longitudinale selon la V-V de la figure 6 montrant un échangeur de chaleur selon une troisième forme de réalisation de l'invention ;
  • la figure 6 est une vue partielle en coupe selon la ligne VI-VI de la figure 5.
The other characteristics and advantages of the invention will now emerge from the description which follows, with reference, by way of example, to the appended drawings, in which:
  • Figure 1 is a partial view in longitudinal section along line II of Figure 2 and showing a heat exchanger according to a first embodiment of the invention;
  • Figure 2 is a partial sectional view along line II-II of Figure 1;
  • Figure 3 is a partial view in longitudinal section along the line III-III of Figure 4 and showing a heat exchanger according to a second embodiment of the invention;
  • FIG. 4 is a partial sectional view along the line IV-IV of FIG. 3.
  • Figure 5 is a partial view in longitudinal section along the VV of Figure 6 showing a heat exchanger according to a third embodiment of the invention;
  • FIG. 6 is a partial sectional view along the line VI-VI of FIG. 5.

On se réfère maintenant aux figures 1 et 2 qui montrent un échangeur de chaleur constitué d'un faisceau 2 formé d'une multiplicité de tubes 4 d'axes respectifs parallèles XX en étant disposés suivant deux rangées parallèles R1, R2.Referring now to Figures 1 and 2 which show a heat exchanger consisting of a bundle 2 formed of a multiplicity of tubes 4 of respective parallel axes XX being arranged in two parallel rows R1, R2.

Les tubes traversent une multiplicité d'ailettes 6 s'étendant, ici, perpendiculairements aux axes XX des tubes.The tubes pass through a multiplicity of fins 6 extending, here, perpendicularly to the axes XX of the tubes.

Les extrémités 8 des tubes 4 sont aptes à être reçues à étanchéité dans une plaque collectrice 10 qui comporte une âme 12 de forme générale rectangulaire, au travers de laquelle sont ménagés, en correspondances des extrémités 8 des tubes 4, une mutiplicité de trous 14 de forme correspondant à la forme des extrémités 8 et dont chacun est bordé par un collet 16 s'étendant des directions des ailettes 6.The ends 8 of the tubes 4 are able to be received with sealing in a collecting plate 10 which comprises a core 12 of generally rectangular shape, through which are formed, in correspondence of the ends 8 of the tubes 4, a multiplicity of holes 14 of shape corresponding to the shape of the ends 8 and of which each is bordered by a collar 16 extending from the directions of the fins 6.

Comme visible sur la figure 1, la plaque collectrice 10 comporte un rebord périphérique 18 délimitant une gorge périphérique 20 et formant une multiplicité de pattes rabattables 22.As can be seen in FIG. 1, the collector plate 10 has a peripheral rim 18 delimiting a peripheral groove 20 and forming a multiplicity of folding legs 22.

Sur la face de la plaque collectrice opposée aux ailettes 6 est disposé un joint compressible 24, réalisé, de manière préférentielle, dans un matériau élastomère.On the face of the collector plate opposite the fins 6 is disposed a compressible seal 24, preferably made of an elastomeric material.

Ce joint comprend une âme 26 appliquée contre l'âme 12 de la plaque collectrice et pourvue de collets compressibles 28 susceptibles d'être comprimés entre un collet 16 de la plaque collectrice 10 et l'extrémité 8 du tube 4 par tous moyens appropriés, tels qu'un montage à force de l'extrémité 8 dans les collets 28 ou par évasage desdites extrémités comme cela est connu en soi.This seal comprises a core 26 applied against the core 12 of the collector plate and provided with compressible collars 28 capable of being compressed between a collar 16 of the collector plate 10 and the end 8 of the tube 4 by any suitable means, such as that a forced assembly of the end 8 in the collars 28 or by flaring said ends as is known per se.

L'âme 26 du joint 24 est pourvue d'un rebord 30 reçu dans la gorge 20 et destiné à être comprimé par un bord périphérique 32 d'une boite collectrice 34.The core 26 of the seal 24 is provided with a flange 30 received in the groove 20 and intended to be compressed by a peripheral edge 32 of a manifold 34.

L'étanchéité entre la boîte collectrice 34 et la plaque collectrice 10 est assurée par compression du rebord 30 après rabattement des pattes 22 que présente la plaque collectrice.The seal between the collector box 34 and the collector plate 10 is ensured by compression of the flange 30 after the tabs 22 that the collector plate has folded down.

La boîte collectrice 34 présente une forme de cuvette dont le bord ouvert correspond sensiblement à la disposition du bord périphérique 32 et comporte une paroi de fond 36 opposée au bord ouvert tout en étant disposée sensiblement parallèle à la plaque collectrice 10, cette paroi de fond venant rejoindre le bord périphérique 32 par des parois latérales longitudinales 38 et des parois latérales transversales 40.The manifold 34 has a bowl shape, the open edge of which corresponds substantially to the arrangement of the peripheral edge 32 and has a bottom wall 36 opposite the open edge while being disposed substantially parallel to the manifold plate 10, this bottom wall coming from join the peripheral edge 32 by longitudinal side walls 38 and transverse side walls 40.

La structure générale de l'échangeur de chaleur, telle qu'elle vient d'être décrite jusqu'ici, est en elle-même connue et ne sera pas décrite plus en détail.The general structure of the heat exchanger, as just described so far, is in itself known and will not be described in more detail.

La boîte collectrice 34 porte, en outre, des moyens de butée 42 permettant de limiter, voire interdire, le déplacement de l'extrémité 8 des tubes 4 dans les trous 14 de la plaque collectrice 10 et plus particulièrement au niveau des collets 28 du joint d'étanchéité 24, ces moyens de butée étant disposés au voisinage d'au moins une extrémité de tube.The manifold 34 further carries stop means 42 making it possible to limit, or even prohibit, the movement of the end 8 of the tubes 4 in the holes 14 of the manifold plate 10 and more particularly at the collars 28 of the joint. sealing 24, these abutment means being arranged in the vicinity of at least one end of the tube.

Comme visible sur la figure 1, le moyen de butée consiste en un doigt 44 prenant naissance à l'intérieur de la boîte collectrice 34 et, plus particulièrement dans le cas de cette figure, à partir de la face interne de la paroi de fond 36 pour aboutir jusqu'au bord terminal 46 de l'extrémité 8 du tube concerné, bord considéré sensiblement perpendiculaire par rapport à l'axe XX du tube tout en étant disposé à distance de la paroi de fond 36 de la boîte collectrice 34.As visible in FIG. 1, the abutment means consists of a finger 44 originating inside the manifold 34 and, more particularly in the case of this figure, from the internal face of the bottom wall 36 in order to reach the end edge 46 of the end 8 of the tube concerned, edge considered to be substantially perpendicular to the axis XX of the tube while being disposed at a distance from the bottom wall 36 of the manifold 34.

Plus particulièrement, en se référant en plus à la figure 2, l'extrémité libre 48 du doigt 44 qui présente une surface plane sensiblement parallèle au bord terminal 46, s'appuie sur une région localisée du bord 46 de manière à ne pas entraver la circulation du fluide de ce tube, ce doigt étant situé au voisinage de l'extrémité 8 mais de manière excentrée par rapport à l'axe XX du tube 4 tout en ayant la plus grande partie de son corps en dehors du périmètre délimité par le bord 46.More particularly, with further reference to FIG. 2, the free end 48 of the finger 44 which has a flat surface substantially parallel to the terminal edge 46, is supported on a localized region of the edge 46 so as not to hinder the circulation of the fluid in this tube, this finger being located in the vicinity of the end 8 but eccentrically with respect to the axis XX of the tube 4 while having most of its body outside the perimeter delimited by the edge 46.

En outre, comme mieux représenté sur la figure 2, le doigt 44 peut être remplacé par une nervure 50 issue de la paroi latérale longitudinale 38 de la boîte à fluide et venant s'appuyer par son bord libre 48 sur une région localisée du bord 46 de l'extrémité 8 des tubes 4, cette nervure s'étendant en totalité ou en partie le long de cette paroi latérale en étant sensiblement parallèle à l'axe XX du tube concerné et en ayant une partie terminale 52, opposée à la paroi 38, se situant à distance de l'axe XX du tube 4.In addition, as best shown in FIG. 2, the finger 44 can be replaced by a rib 50 coming from the longitudinal side wall 38 of the fluid box and coming to bear by its free edge 48 on a localized region of the edge 46 from the end 8 of the tubes 4, this rib extending in whole or in part along this side wall while being substantially parallel to the axis XX of the tube concerned and having a part terminal 52, opposite the wall 38, located at a distance from the axis XX of the tube 4.

La nervure 50, précédemment décrit, peut être aussi issu de la paroi latérale transversale 40 de la boîte collectrice 34 et s'appuyer sur une région localisée du bord 46 de l'extrémité 8 du tube 4 concerne.The rib 50, previously described, can also come from the transverse lateral wall 40 of the manifold 34 and bear on a localized region of the edge 46 of the end 8 of the tube 4 relates.

Comme visible sur la figure 2, il peut être prévu une nervure 50 associée à un tube 4 de chaque rangée R1, R2 du faisceau de tubes à ailettes.As can be seen in FIG. 2, a rib 50 can be provided associated with a tube 4 of each row R1, R2 of the bundle of finned tubes.

Grâce à ces moyens de butée constitués soit par un doigt, soit par une nervure, disposés au voisinage des tubes concernés, ceux-ci ne pourront pas subir de déplacement axial selon leur axe XX et de ce fait garantiront une parfaite étanchéité entre les extrémités de ces tubes et la plaque collectrice.Thanks to these abutment means constituted either by a finger or by a rib, disposed in the vicinity of the tubes concerned, these cannot be subjected to axial displacement along their axis XX and therefore will guarantee perfect sealing between the ends of these tubes and the header plate.

On se réfère maintenant aux figures 3 et 4 qui montrent une variante de réalisation de l'invention et qui, pour cela, comportera les mêmes références.Reference is now made to FIGS. 3 and 4 which show an alternative embodiment of the invention and which, for this, will include the same references.

Dans cette variante, un doigt 44 est issu de la paroi de fond 36 de la boîte collectrice 34 en étant situé entre deux tubes 4 adjacents situés sur deux rangées R1, R2.In this variant, a finger 44 comes from the bottom wall 36 of the manifold 34 being located between two adjacent tubes 4 located in two rows R1, R2.

Ce doigt, comme visible sur la figure 4, présente une section de forme parallélépipédique de façon à ce que, au niveau de son extrémité libre 48, les petits côtés du doigt viennent s'appuyer sur les bords 46 des extrémités 8 de deux tubes adjacents.This finger, as visible in FIG. 4, has a section of parallelepiped shape so that, at its free end 48, the short sides of the finger come to bear on the edges 46 of the ends 8 of two adjacent tubes .

Ce doigt 44 peut être relié à la paroi latérale transversale 40 de la boîte collectrice par un voile 54 prenant naissance le long d'un bord longitudinal de ce doigt pour aboutir à ladite paroi latérale transversale.This finger 44 can be connected to the transverse side wall 40 of the manifold by a veil 54 originating along a longitudinal edge of this finger to end at said transverse side wall.

Grâce à ce doigt et ce voile, un moyen de butée est formé pour deux tubes adjacents.Thanks to this finger and this veil, a stop means is formed for two adjacent tubes.

On se réfère maintenant aux figures 5 et 6 qui montrent un autre exemple de réalisation de l'invention.We now refer to Figures 5 and 6 which show another embodiment of the invention.

Comme mieux visible sur ces figures, l'extrémité 8 des tubes 4 est montée à étanchéité dans la plaque collectrice 10 par déformation de cette extrémité, déformation obtenue lors d'une opération dite évasage.As best seen in these figures, the end 8 of the tubes 4 is mounted in sealing in the collecting plate 10 by deformation of this end, deformation obtained during a so-called flaring operation.

Cette opération d'évasage, connue de l'Art Antérieur, consiste à augmenter la section du corps 56 du tube 4 au niveau de sa jonction avec la plaque collectrice 10 de manière à comprimer le collet 28 disposé entre la paroi extérieure de cette extrémité et le collet 16 de la plaque collectrice en formant un premier évasage 58.This flaring operation, known from the prior art, consists in increasing the section of the body 56 of the tube 4 at its junction with the collecting plate 10 so as to compress the collar 28 disposed between the outer wall of this end and the collar 16 of the collector plate, forming a first flare 58.

Grâce à cette opération, l'étanchéité est assurée entre l'extrémité 8 du tube 4 et la plaque collectrice 10 et le tube 4 présente un épaulement radial 60 situé entre le corps 56 du tube et le premier évage 58.Thanks to this operation, the seal is ensured between the end 8 of the tube 4 and the collector plate 10 and the tube 4 has a radial shoulder 60 located between the body 56 of the tube and the first vent 58.

De manière préférentielle, il est prévu de faire un second évasage 62 faisant suite au premier évasage en direction du bord libre 46 de l'extrémité 8, ce second évasage de plus grand diamètre que le premier évasage permettant d'obtenir un arrêt du tube 4 dans le trou 14.Preferably, it is planned to make a second flaring 62 following the first flaring in the direction of the free edge 46 of the end 8, this second flaring of larger diameter than the first flaring making it possible to stop the tube 4 in hole 14.

Ce second évasage 62 a pour résultat de créer un second épaulement 64 disposé à distance du premier épaulement 60 du premier évasage 58 et en étant situé entre le premier évasage et le second évasage.This second flare 62 has the result of creating a second shoulder 64 disposed at a distance from the first shoulder 60 of the first flare 58 and being located between the first flare and the second flare.

Avec une telle disposition, il est prévu que les moyens de butée 42 s'appuient sur l'extrémité 8 du tube 4 en venant en contact sur un épaulement, soit l'épaulement 60 du premier évasage 58, soit l'épaulement 64 du second évasage 62.With such an arrangement, it is expected that the abutment means 42 are supported on the end 8 of the tube 4 coming into contact on a shoulder, either the shoulder 60 of the first flare 58, or the shoulder 64 of the second flare 62.

Pour ce faire il est prévu un doigt 44 issu de la paroi de fond 36 de la boîte collectrice et dont l'extrémité libre 48 du doigt pénètre soit dans le premier évasage 58, soit dans le second évasage 62 en s'appuyant par ladite extrémité libre sur l'épaulement concerné.To do this, a finger 44 is provided from the bottom wall 36 of the manifold and the free end 48 of the finger penetrates either into the first flare 58 or into the second flare 62 by resting on said end. free on the affected shoulder.

En se référant à la figure 5, l'extrémité libre 48 du doigt 44 s'appuie sur le second épaulement 64 du second évasage 62 et présente, en section, comme visisible sur la figure 6, une forme selon laquelle un corps 66 sensiblement rectangulaire porte à chaque extrémité une portion de guidage 68 de plus grande épaisseur transversale. Ces portions de guidage comportent une portion de surface cylindrique extérieure 70 dont le diamètre correspond sensiblement au diamètre de l'évasage considéré, ici l'évasage 62, et deux parois verticales 72 venant rejoindre le corps 66 du doigt 44.Referring to Figure 5, the free end 48 of the finger 44 is supported on the second shoulder 64 of the second flaring 62 and has, in section, as can be seen in FIG. 6, a shape in which a substantially rectangular body 66 carries at each end a guide portion 68 of greater transverse thickness. These guide portions comprise an outer cylindrical surface portion 70 whose diameter corresponds substantially to the diameter of the flare considered, here the flare 62, and two vertical walls 72 coming to join the body 66 of the finger 44.

De manière préférentielle, la distance A considérée entre les portions des surfaces cylindriques 70 correspond sensiblement au diamètre des portions de l'extrémité concernée par cet évasage, ici l'évasage 62 et deux parois verticales 72 venant rejoindre le corps 66 du doigt 44.Preferably, the distance A considered between the portions of the cylindrical surfaces 70 corresponds substantially to the diameter of the portions of the end concerned by this flaring, here the flaring 62 and two vertical walls 72 coming to join the body 66 of the finger 44.

De manière préférentielle, et comme cela est visible sur la figure 6 qui montre une extrémité de tube ovale présentant des évasages, la distance A des portions de surface cylindriques correspond sensiblement à la petite dimension de l'ovale de l'évasage et l'extrémité libre 48 porte une surface d'appui 74 d'inclinaison correspondant à l'inclinaison de l'épaulement sur lequel il appuie et l'épaisseur B du corps 66 est suffisamment petite pour gêner le moins possible la circulation du fluide dans le tube considéré.Preferably, and as can be seen in FIG. 6 which shows an end of an oval tube having flares, the distance A of the cylindrical surface portions corresponds substantially to the small dimension of the oval of the flare and the end free 48 carries an inclination bearing surface 74 corresponding to the inclination of the shoulder on which it presses and the thickness B of the body 66 is small enough to interfere as little as possible with the circulation of the fluid in the tube in question.

La présente invention n'est pas limitée aux exemples de réalisation décrits mais englobe toute variante.The present invention is not limited to the embodiments described but encompasses any variant.

Notamment, la description des exemples de réalisation fait état de moyens de butée pour un tube et/ou pour deux tubes adjacents de deux rangées différentes, et il peut être envisagé d'utiliser ces moyens de butée pour plusieurs tubes comportant chacun un moyen de butée distinct et/ou pour deux tubes adjacents appartenant à la même rangée de tubes.In particular, the description of the exemplary embodiments shows stop means for a tube and / or for two adjacent tubes of two different rows, and it can be envisaged to use these stop means for several tubes each comprising a stop means separate and / or for two adjacent tubes belonging to the same row of tubes.

Claims (11)

Echangeur de chaleur, notamment pour véhicule automobile, comprenant un faisceau de tubes (4) muni d'ailettes (6) dans lequel les extrémités (8) des tubes sont montées à étanchéité dans des trous (14) d'une plaque collectrice (10) sur laquelle est montée une boite collectrice (34), caractérisé en ce que des moyens de butée (42) sont prévus entre la boîte collectrice (34) et au moins une extrémité (8) des tubes (4) en s'appuyant sur ladite extrémité.Heat exchanger, in particular for a motor vehicle, comprising a bundle of tubes (4) provided with fins (6) in which the ends (8) of the tubes are sealingly mounted in holes (14) in a collector plate (10 ) on which is mounted a manifold (34), characterized in that abutment means (42) are provided between the manifold (34) and at least one end (8) of the tubes (4) based on said end. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les moyens de butée consistent en un doigt (44) issu de la boite collectrice (34).Heat exchanger according to claim 1, characterized in that the stop means consist of a finger (44) from the manifold (34). Echangeur de chaleur selon la revendication 1 ou 2, caractérisé en ce que les moyens de butée consistent en une nervure (50) issu de la boîte collectrice (34).Heat exchanger according to claim 1 or 2, characterized in that the abutment means consist of a rib (50) coming from the manifold (34). Echangeur de chaleur selon l'une des revendications 1 à 3, caractérisé en ce que les moyens de butée sont issus de la paroi de fond (36) de la boîte collectrice (34).Heat exchanger according to one of claims 1 to 3, characterized in that the abutment means come from the bottom wall (36) of the manifold (34). Echangeur de chaleur selon l'une des revendications 1 à 4, caractérisé en ce que les moyens de butée sont issus d'au moins une paroi latérale (38,40) de la boîte collectrice (34).Heat exchanger according to one of claims 1 to 4, characterized in that the stop means come from at least one side wall (38,40) of the manifold (34). Echangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que les moyens de butée (44) sont reliés à au moins une des parois latérales (38,40) de la boîte collectrice par un voile (54).Heat exchanger according to one of the preceding claims, characterized in that the stop means (44) are connected to at least one of the side walls (38,40) of the manifold by a web (54). Echangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que les moyens de butée sont situés entre au moins deux extrémités (8) de tubes (4) adjacents.Heat exchanger according to one of the preceding claims, characterized in that the stop means are located between at least two ends (8) of adjacent tubes (4). Echangeur de chaleur selon l'une des revendications 1 à 7, caractérisé en ce que les moyens de butée s'appuient sur le bord terminal (46) de l'extrémité (8).Heat exchanger according to one of Claims 1 to 7, characterized in that the stop means bear on the terminal edge (46) of the end (8). Echangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que les moyens de butée (42) présentent une surface plane (48) d'appui sur l'extrémité (8).Heat exchanger according to one of the preceding claims, characterized in that the stop means (42) have a flat surface (48) bearing on the end (8). Echangeur de chaleur selon l'une des revendications 1 à 6, caractérisé en ce que les moyens de butée (42) s'appuient sur un épaulement (60,64) prévu dans l'extrémité (8).Heat exchanger according to one of claims 1 to 6, characterized in that the abutment means (42) are supported on a shoulder (60,64) provided in the end (8). Echangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que les moyens de butée s'appuient sur une région localisée de l'extrémité (8).Heat exchanger according to one of the preceding claims, characterized in that the abutment means are supported on a localized region of the end (8).
EP94107180A 1993-05-11 1994-05-07 Heat-exchanger for motor vehicle Expired - Lifetime EP0624772B1 (en)

Applications Claiming Priority (2)

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FR9305650A FR2705143B1 (en) 1993-05-11 1993-05-11 HEAT EXCHANGER IN PARTICULAR FOR A MOTOR VEHICLE.
FR9305650 1993-05-11

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BR (1) BR9401945A (en)
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Also Published As

Publication number Publication date
BR9401945A (en) 1994-12-13
EP0624772B1 (en) 2000-08-30
DE69425688D1 (en) 2000-10-05
DE69425688T2 (en) 2001-04-19
FR2705143B1 (en) 1995-06-23
FR2705143A1 (en) 1994-11-18
US5535821A (en) 1996-07-16

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