EP0578566A1 - Heat-exchanger with several rows of tubes, particularly for motor vehicles - Google Patents

Heat-exchanger with several rows of tubes, particularly for motor vehicles Download PDF

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Publication number
EP0578566A1
EP0578566A1 EP93401757A EP93401757A EP0578566A1 EP 0578566 A1 EP0578566 A1 EP 0578566A1 EP 93401757 A EP93401757 A EP 93401757A EP 93401757 A EP93401757 A EP 93401757A EP 0578566 A1 EP0578566 A1 EP 0578566A1
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EP
European Patent Office
Prior art keywords
flange
tubes
heat exchanger
hole
exchanger according
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.)
Withdrawn
Application number
EP93401757A
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German (de)
French (fr)
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 EP0578566A1 publication Critical patent/EP0578566A1/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/0219Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224Header boxes formed by sealing end plates into covers
    • F28F9/0226Header boxes formed by sealing end plates into covers with resilient gaskets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/04Arrangements for sealing elements into header boxes or end plates
    • F28F9/06Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/14Arrangements for sealing elements into header boxes or end plates by dismountable joints by force-joining
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2230/00Sealing means

Definitions

  • the invention relates to a heat exchanger of the type comprising a bundle of parallel tubes arranged in rows and having respective ends received in a collecting plate provided with holes.
  • Such heat exchangers are used in particular in motor vehicles with an internal combustion engine to constitute either an engine cooling radiator or a cabin heating radiator.
  • the tubes of the bundle are traversed by a fluid, generally water added with an antifreeze, used for cooling the engine, while a flow of air scans the beam tubes.
  • a heat exchanger of the type comprising a bundle of parallel tubes arranged in rows, a collecting plate provided with holes each receiving the respective ends of several adjacent tubes belonging to different rows of the bundle, as well as a compressible seal provided with flanges, each of which is placed in a hole and has annular parts respectively surrounding the ends of the tubes received in the hole.
  • the spacing or not of the tubes, from one row to another can be brought to a minimum value.
  • the shape of the holes does not make it possible to obtain, after assembly, a uniform compression ratio of the seal over the entire periphery of the tubes introduced into the same hole.
  • This compression is weaker in the region of the joint between two ends of adjacent tubes because this region of the joint is thicker than the others.
  • the invention provides a heat exchanger of the aforementioned type, in which the annular parts of each flange of the joint join in pairs in a region of intersection which includes extra thicknesses of material capable of being compressed between the edge of the hole and the tube ends it receives.
  • the region of intersection of the flange may include extra thicknesses of material arranged inside the flange and suitable for being compressed by the ends of tubes received in the annular parts of the flange.
  • the region of intersection of the collar comprises a pair of thickeners of material disposed inside each of the annular parts of the collar.
  • the extra thicknesses of each pair are advantageously arranged symmetrically on either side of this large axis .
  • the region of intersection of the flange may include extra thicknesses of material placed outside the flange and suitable for being compressed by the edge of the hole.
  • this region of intersection advantageously comprises two opposite extra thicknesses capable of being compressed between two opposite regions of the hole, which form a constriction.
  • the heat exchanger may include both extra thicknesses of material arranged inside the flange and extra thicknesses of material disposed outside of the flange.
  • FIGS. 1 and 2 represent a collecting plate 10, also called a "hole plate", having a core 12 of generally rectangular shape.
  • the core 12 is preferably formed from a metallic material and is limited by two parallel edges 14 corresponding to the two long sides of the rectangle and two other parallel edges (not shown in the drawings) corresponding to the short sides of the rectangle.
  • each of the edges 14 firstly comprises a part 16 connected at right angles to the core 12, a part 18 connected at right angles to the part 16 and finally a part 20 connected at right angles to the part 18.
  • the parts 16 and 18 of each edge 14 thus define a groove 22 extending over the entire periphery of the plate 10 and the function of which will be explained below.
  • Each of the parts 20 is crenellated on its free edge to define a series of tabs 24 capable of being folded down to ensure the assembly of the collector plate with a wall of water box (not shown).
  • each of the holes 26 has, in the direction of its length, an axis of symmetry XX 'which extends perpendicular to the edges 14 of the collector plate 10.
  • Each of the holes 26 is formed by the union of two identical oval sections 28 which intersect at a constriction 30.
  • the two sections 28 are generally elliptical, their respective major axes being aligned in the direction of the axis XX '.
  • the respective centers of the two elliptical sections 28 define between them a center distance or not P.
  • the distance between two adjacent holes 26 defines a center distance E whose direction is perpendicular to that of the step P.
  • Each of the holes 26 is surrounded by a collar 32 whose contour corresponds to that of the two sections 28, including their throttle 30.
  • Each of the collars 30 is projecting relative to the core 12 on the side opposite the legs 24.
  • each hole 26 is intended to receive the respective ends of two tubes belonging to two adjacent rows of a bundle formed by two rows of tubes. Within the same row, the tubes are separated two by two by a center distance E ( Figure 1).
  • the seal 34 made of a compressible elastomeric material, comprises a core 36 of generally rectangular shape corresponding to that of the 'core 12 of the header plate 10.
  • the core 36 is limited by two longitudinal beads 38 corresponding to the two long sides of the rectangle and two lateral beads (not shown) corresponding to the two short sides of the rectangle.
  • the beads 38 are attached to the core 36 by a veil of material 40. This gives a bead extending over the entire periphery of the seal and suitable for being introduced into the groove of the collector plate.
  • the core 36 is provided with compressible collars 42 each of which has a shape adapted to that of a hole 26 so that it can be introduced into the latter when the core 36 of the seal 34 is applied against the core 12 of the collector plate.
  • Each collar 42 thus has the general shape of an 8 formed by two oval annular parts 44 joined together by a region of intersection 46 forming a material bridge between the two annular parts.
  • the core 36 forms, inside each compressible collar 42, two orifices suitable for each receiving one end of a tube of the bundle.
  • the heat exchanger also comprises a bundle 52 formed of two rows of tubes 54 of non-circular section which pass through a multiplicity of parallel fins 56.
  • the tubes 54 are separated in pairs by a center distance E within the same row and by a step P from one row to another.
  • the tubes 54 have respective ends 58 of non-circular shape spaced from one another with the same center distance and the same pitch as the tubes.
  • the intersection region 46 of the collar 42 firstly comprises a pair of thickeners of material 60 disposed inside each of the two annular parts 44 of the collar 42 (FIG. 5).
  • the annular parts 44 are provided to adapt each around an end 58 having, as already indicated, a generally oval or elliptical section with a major axis XX '.
  • the extra thicknesses 60 of each pair are arranged symmetrically with respect to this major axis XX 'on the side of the end of the oval or elliptical section which is connected to the region of intersection 46.
  • the extra thicknesses 60 are delimited by a straight edge which constitutes a cord encroaching on the oval or elliptical section intended to be then occupied by one end of the tube 58.
  • the region of intersection 46 also comprises two extra thicknesses of material 62 arranged outside the flange and suitable for being compressed by the edge of the hole 30.
  • the extra thicknesses 62 consequently limit the region d 'intersection 46 in a direction perpendicular to that of the major axis XX'.
  • the extra thicknesses 62 each connect the outside of the two annular parts 44.
  • the extra thicknesses 62 have, before compression of the joint, a curved shape as shown in solid lines in FIG. 5.
  • the two extra thicknesses 62 are compressed respectively between two opposite regions of the throat 30 of the hole 26 (FIG. 1).
  • the two extra thicknesses 62 then conform to the shape of the two opposite regions of the constriction 30 as shown in broken lines in FIG. 5.
  • the two extra thicknesses 62 approach each other which also compresses the attached.
  • intersection region 46 is compressed not only in the direction of the axis XX ', but also in a direction perpendicular to this axis.
  • the compression ratio between the flange and the end of the tube is substantially constant not only in the annular parts 44, but also in the region of intersection 46.
  • the invention can also be applied to heat exchangers whose end sections of the tubes have different shapes.
  • each of the flanges of the joint then comprises more than two annular parts and at least two regions of intersection.

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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

Un échangeur de chaleur comprend une plaque collectrice (10) munie de trous (26) recevant chacun les extrémités respectives de plusieurs tubes adjacents avec interposition d'un joint d'étanchéité compressible. Le joint d'étanchéité (34) est muni de collerettes (42) dont chacune est placée dans un trou de la plaque collectrice (10) et comporte des parties annulaires (44) entourant respectivement les extrémités des tubes reçues dans le trous, les parties annulaires (44) se rejoignant deux à deux dans une région d'intersection (46) comportant des surépaisseurs de matière (60,62) propres à être comprimées entre le bord du trou et les extrémités de tubes qu'il reçoit. Application notamment aux échangeurs de chaleur pour véhicules automobiles. <IMAGE>A heat exchanger comprises a collecting plate (10) provided with holes (26) each receiving the respective ends of several adjacent tubes with the interposition of a compressible seal. The seal (34) is provided with flanges (42) each of which is placed in a hole in the collector plate (10) and has annular parts (44) respectively surrounding the ends of the tubes received in the hole, the parts annulars (44) joining two by two in an intersection region (46) comprising extra thicknesses of material (60,62) suitable for being compressed between the edge of the hole and the ends of tubes which it receives. Application in particular to heat exchangers for motor vehicles. <IMAGE>

Description

L'invention concerne un échangeur de chaleur du type comprenant un faisceau de tubes parallèles disposés en rangées et présentant des extrémités respectives reçues dans une plaque collectrice munie de trous.The invention relates to a heat exchanger of the type comprising a bundle of parallel tubes arranged in rows and having respective ends received in a collecting plate provided with holes.

De tels échangeurs de chaleur sont utilisés notamment dans les véhicules automobiles à moteur à combustion interne pour constituer soit un radiateur de refroidissement du moteur, soit un radiateur de chauffage de l'habitacle. Dans l'une ou l'autre de ces deux applications, les tubes du faisceau sont parcourus par un fluide, généralement de l'eau additionnée d'un antigel, servant au refroidissement du moteur, tandis qu'un flux d'air balaie les tubes du faisceau.Such heat exchangers are used in particular in motor vehicles with an internal combustion engine to constitute either an engine cooling radiator or a cabin heating radiator. In either of these two applications, the tubes of the bundle are traversed by a fluid, generally water added with an antifreeze, used for cooling the engine, while a flow of air scans the beam tubes.

Dans les échangeurs de chaleur connus de ce type, il est prévu habituellement autant de trous dans la plaque collectrice que de tubes dans le faisceau, pour que chaque extrémité de tube soit reçue individuellement dans un trou de la plaque collectrice et soit relié à étanchéité à cette dernière.In known heat exchangers of this type, there are usually provided as many holes in the collector plate as there are tubes in the bundle, so that each end of the tube is individually received in a hole in the collector plate and is connected to sealing at the latter.

Dans la Demande de brevet français No 91 03411, au nom de la Demanderesse, on a proposé un échangeur de chaleur du type comprenant un faisceau de tubes parallèles disposés en rangées, une plaque collectrice munie de trous recevant chacun les extrémités respectives de plusieurs tubes adjacents appartenant à des rangées différentes du faisceau, ainsi qu'un joint d'étanchéité compressible muni de collerettes dont chacune d'elles est placée dans un trou et comporte des parties annulaires entourant respectivement les extrémités des tubes reçues dans le trou.In French Patent Application No. 91 03411, in the name of the Applicant, a heat exchanger of the type has been proposed comprising a bundle of parallel tubes arranged in rows, a collecting plate provided with holes each receiving the respective ends of several adjacent tubes belonging to different rows of the bundle, as well as a compressible seal provided with flanges, each of which is placed in a hole and has annular parts respectively surrounding the ends of the tubes received in the hole.

Du fait que les extrémités respectives de plusieurs tubes sont reçues dans un seul trou de la plaque collectrice, au lieu d'être reçues chacune individuellement dans un trou de la plaque collectrice, l'entraxe ou pas des tubes, d'une rangée à l'autre, peut être amené à une valeur minimale.Because the respective ends of several tubes are received in a single hole in the collector plate, instead of being each received individually in a hole in the plate collector, the spacing or not of the tubes, from one row to another, can be brought to a minimum value.

On peut ainsi optimiser les performances de l'échangeur de chaleur, et cela pour une largeur minimale de la plaque collectrice.It is thus possible to optimize the performance of the heat exchanger, and this for a minimum width of the header plate.

Toutefois, dans l'échangeur de chaleur du type cité en dernier lieu, la forme des trous ne permet pas d'obtenir, après assemblage, un taux de compression uniforme du joint sur toute la périphérie des tubes introduite dans un même trou.However, in the heat exchanger of the type mentioned last, the shape of the holes does not make it possible to obtain, after assembly, a uniform compression ratio of the seal over the entire periphery of the tubes introduced into the same hole.

Cette compression est plus faible dans la région du joint comprise entre deux extrémités de tubes adjacentes car cette région du joint est plus épaisse que les autres.This compression is weaker in the region of the joint between two ends of adjacent tubes because this region of the joint is thicker than the others.

Il peut donc en résulter un défaut d'étanchéité qui est préjudiciable au bon fonctionnement de l'échangeur de chaleur.This can therefore result in a leak which is detrimental to the proper functioning of the heat exchanger.

C'est en conséquence un but de l'invention de remédier à cet inconvénient.It is therefore an object of the invention to remedy this drawback.

C'est aussi un but de l'invention de procurer un échangeur de chaleur de ce type permettant d'obtenir un taux de compression uniforme du joint sur toute la périphérie des tubes, et notamment dans la région du joint comprise entre les deux extrémités de tubes adjacentes.It is also an object of the invention to provide a heat exchanger of this type making it possible to obtain a uniform compression ratio of the seal over the entire periphery of the tubes, and in particular in the region of the seal comprised between the two ends of adjacent tubes.

L'invention propose à cet effet un échangeur de chaleur du type précité, dans lequel les parties annulaires de chaque collerette du joint se rejoignent deux à deux dans une région d'intersection qui comporte des surépaisseurs de matière propres à être comprimées entre le bord du trou et les extrémités de tubes qu'il reçoit.To this end, the invention provides a heat exchanger of the aforementioned type, in which the annular parts of each flange of the joint join in pairs in a region of intersection which includes extra thicknesses of material capable of being compressed between the edge of the hole and the tube ends it receives.

Ces surépaisseurs de matière permettent de compenser le manque de compression dans la région d'intersection du joint, qui est comprise entre deux extrémités de tubes adjacentes.These extra thicknesses make it possible to compensate for the lack of compression in the region of intersection of the joint, which is between two ends of adjacent tubes.

De ce fait, on garantit une parfaite étanchéité au niveau du raccordement entre les tubes du faisceau et la plaque collectrice.Therefore, a perfect seal is guaranteed at the connection between the bundle tubes and the collector plate.

La région d'intersection de la collerette peut comprendre des surépaisseurs de matière disposées à l'intérieur de la collerette et propres à être comprimées par les extrémités de tubes reçues dans les parties annulaires de la collerette.The region of intersection of the flange may include extra thicknesses of material arranged inside the flange and suitable for being compressed by the ends of tubes received in the annular parts of the flange.

Avantageusement, la région d'intersection de la collerette comprend une paire de surépaisseurs de matière disposée à l'intérieur de chacune des parties annulaires de la collerette.Advantageously, the region of intersection of the collar comprises a pair of thickeners of material disposed inside each of the annular parts of the collar.

Dans le cas où la collerette est prévue pour s'adapter sur des extrémités de tubes ayant une section de forme générale ovale ou elliptique possédant un grand axe, les surépaisseurs de chaque paire sont avantageusement disposées symétriquement de part et d'autre de ce grand axe.In the case where the flange is designed to fit on the ends of tubes having a generally oval or elliptical cross section having a large axis, the extra thicknesses of each pair are advantageously arranged symmetrically on either side of this large axis .

La région d'intersection de la collerette peut comprendre des surépaisseurs de matière disposées à l'extérieur de la collerette et propres à être comprimées par le bord du trou.The region of intersection of the flange may include extra thicknesses of material placed outside the flange and suitable for being compressed by the edge of the hole.

En ce cas, cette région d'intersection comprend avantageusement deux surépaisseurs opposées propres à être comprimées entre deux régions opposées du trou, qui forment un étranglement.In this case, this region of intersection advantageously comprises two opposite extra thicknesses capable of being compressed between two opposite regions of the hole, which form a constriction.

L'échangeur de chaleur peut comprendre à la fois des surépaisseurs de matière disposées à l'intérieur de la collerette et des surépaisseurs de matière disposées à l'extérieur de la collerette.The heat exchanger may include both extra thicknesses of material arranged inside the flange and extra thicknesses of material disposed outside of the flange.

Dans la description qui suit, faite seulement à titre d'exemple, on se réfère au dessin annexé, sur lequel :

  • la figure 1 est une vue partielle de dessus d'une plaque collectrice faisant partie d'un échangeur de chaleur selon l'invention;
  • la figure 2 est une vue en coupe suivant la ligne II-II de la figure 1;
  • la figure 3 est une vue en coupe d'un joint d'étanchéité destiné à équiper la plaque collectrice des figures 1 et 2;
  • la figure 4 est une coupe transversale partielle d'un échangeur de chaleur comprenant un faisceau de tubes assemblés sur la plaque collectrice des figures 1 et 2 avec interposition du joint d'étanchéité de la figure 3; et
  • la figure 5 est une vue d'extrémité, à échelle agrandie, d'une collerette du joint d'étanchéité des figures 3 et 4 montrant les surépaisseurs de la région d'intersection représentées en trait plein avant compression et en trait interrompu après compression.
In the description which follows, given solely by way of example, reference is made to the appended drawing, in which:
  • Figure 1 is a partial top view of a header plate forming part of a heat exchanger according to the invention;
  • Figure 2 is a sectional view along line II-II of Figure 1;
  • Figure 3 is a sectional view of a seal intended to equip the header plate of Figures 1 and 2;
  • Figure 4 is a partial cross section of a heat exchanger comprising a bundle of tubes assembled on the header plate of Figures 1 and 2 with interposition of the seal of Figure 3; and
  • Figure 5 is an end view, on an enlarged scale, of a flange of the seal of Figures 3 and 4 showing the thicknesses of the intersection region shown in solid lines before compression and in broken lines after compression.

On se réfère d'abord aux figures 1 et 2 qui représentent une plaque collectrice 10, encore appelée "plaque à trous", possédant une âme 12 de forme générale rectangulaire. L'âme 12 est formée de préférence en un matériau métallique et est limitée par deux bords parallèles 14 correspondant aux deux grands côtés du rectangle et deux autres bords parallèles (non montrés sur les dessins) correspondant aux petits côtés du rectangle.Reference is first made to FIGS. 1 and 2 which represent a collecting plate 10, also called a "hole plate", having a core 12 of generally rectangular shape. The core 12 is preferably formed from a metallic material and is limited by two parallel edges 14 corresponding to the two long sides of the rectangle and two other parallel edges (not shown in the drawings) corresponding to the short sides of the rectangle.

Comme le montre la figure 2, chacun des bords 14 comprend d'abord une partie 16 raccordée à angle droit avec l'âme 12, une partie 18 raccordée à angle droit avec la partie 16 et enfin une partie 20 raccordée à angle droit à la partie 18. Les parties 16 et 18 de chaque bord 14 définissent ainsi une gorge 22 s'étendant sur toute la périphérie de la plaque 10 et dont la fonction sera expliquée plus loin. Chacune des parties 20 est crénelée sur son bord libre pour définir une série de pattes 24 propres à être rabattues pour assurer l'assemblage de la plaque collectrice avec une paroi de boîte à eau (non représentée).As shown in FIG. 2, each of the edges 14 firstly comprises a part 16 connected at right angles to the core 12, a part 18 connected at right angles to the part 16 and finally a part 20 connected at right angles to the part 18. The parts 16 and 18 of each edge 14 thus define a groove 22 extending over the entire periphery of the plate 10 and the function of which will be explained below. Each of the parts 20 is crenellated on its free edge to define a series of tabs 24 capable of being folded down to ensure the assembly of the collector plate with a wall of water box (not shown).

Au travers de l'âme 12 de la plaque collectrice 10 sont formés des trous oblongs 26, identiques entre eux, dont trois sont visibles sur la figure 1. Chacun des trous 26 possède, dans le sens de sa longueur, un axe de symétrie XX' qui s'étend perpendiculairement aux bords 14 de la plaque collectrice 10. Chacun des trous 26 est formé par la réunion de deux sections ovales identiques 28 qui s'intersectent au niveau d'un étranglement 30.Through the core 12 of the collector plate 10 are formed oblong holes 26, identical to each other, three of which are visible in Figure 1. Each of the holes 26 has, in the direction of its length, an axis of symmetry XX 'which extends perpendicular to the edges 14 of the collector plate 10. Each of the holes 26 is formed by the union of two identical oval sections 28 which intersect at a constriction 30.

Dans l'exemple, les deux sections 28 sont généralement elliptiques, leurs grands axes respectifs étant alignés dans la direction de l'axe XX'. Les centres respectifs des deux sections elliptiques 28 définissent entre eux un entraxe ou pas P. Par ailleurs, la distance entre deux trous adjacents 26 définit un entraxe E dont la direction est perpendiculaire à celle du pas P.In the example, the two sections 28 are generally elliptical, their respective major axes being aligned in the direction of the axis XX '. The respective centers of the two elliptical sections 28 define between them a center distance or not P. Furthermore, the distance between two adjacent holes 26 defines a center distance E whose direction is perpendicular to that of the step P.

Chacun des trous 26 est entouré par un collet 32 dont le contour correspond à celui des deux sections 28, y compris leur étranglement 30. Chacun des collets 30 est en saillie par rapport à l'âme 12 du côté opposé aux pattes 24. Comme on le verra plus loin, chaque trou 26 est destiné à recevoir les extrémités respectives de deux tubes appartenant à deux rangées adjacentes d'un faisceau formé de deux rangées de tubes. Au sein d'une même rangée, les tubes sont séparés deux à deux par un entraxe E (figure 1).Each of the holes 26 is surrounded by a collar 32 whose contour corresponds to that of the two sections 28, including their throttle 30. Each of the collars 30 is projecting relative to the core 12 on the side opposite the legs 24. As we as will be seen later, each hole 26 is intended to receive the respective ends of two tubes belonging to two adjacent rows of a bundle formed by two rows of tubes. Within the same row, the tubes are separated two by two by a center distance E (Figure 1).

On se réfère maintenant à la figure 3 qui représente un joint d'étanchéité 34 destiné à être appliqué sur la plaque collectrice 10. Le joint 34, réalisé en une matière élastomère compressible, comprend une âme 36 de forme générale rectangulaire correspondant à celle de l'âme 12 de la plaque collectrice 10. L'âme 36 est limitée par deux bourrelets longitudinaux 38 correspondant aux deux grands côtés du rectangle et deux bourrelets latéraux (non représentés) correspondant aux deux petits côtés du rectangle. Les bourrelets 38 se rattachent à l'âme 36 par un voile de matière 40. On obtient ainsi un bourrelet s'étendant sur toute la périphérie du joint et propre à être introduit dans la gorge de la plaque collectrice.Referring now to Figure 3 which shows a seal 34 intended to be applied to the collector plate 10. The seal 34, made of a compressible elastomeric material, comprises a core 36 of generally rectangular shape corresponding to that of the 'core 12 of the header plate 10. The core 36 is limited by two longitudinal beads 38 corresponding to the two long sides of the rectangle and two lateral beads (not shown) corresponding to the two short sides of the rectangle. The beads 38 are attached to the core 36 by a veil of material 40. This gives a bead extending over the entire periphery of the seal and suitable for being introduced into the groove of the collector plate.

L'âme 36 est munie de collets compressibles 42 dont chacun a une forme adaptée à celle d'un trou 26 pour pouvoir être introduite dans ce dernier lorsque l'âme 36 du joint 34 est appliquée contre l'âme 12 de la plaque collectrice.The core 36 is provided with compressible collars 42 each of which has a shape adapted to that of a hole 26 so that it can be introduced into the latter when the core 36 of the seal 34 is applied against the core 12 of the collector plate.

Chaque collet 42 affecte ainsi la forme générale d'un 8 formé de deux parties annulaires ovales 44 réunies entre elles par une région d'intersection 46 formant pont de matière entre les deux parties annulaires. Ainsi, lorsqu'un collet compressible 42 est introduit dans un collet 32 d'une plaque collectrice 10, les deux parties annulaires 44 du collet 42 s'engagent respectivement dans les deux sections 28 du trou 26, la région d'intersection 46 venant se placer dans l'étranglement 30. L'âme 36 forme, à l'intérieur de chaque collet compressible 42, deux orifices propres à recevoir chacun une extrémité d'un tube du faisceau.Each collar 42 thus has the general shape of an 8 formed by two oval annular parts 44 joined together by a region of intersection 46 forming a material bridge between the two annular parts. Thus, when a compressible collar 42 is introduced into a collar 32 of a collector plate 10, the two annular parts 44 of the collar 42 engage respectively in the two sections 28 of the hole 26, the region of intersection 46 coming from place in the constriction 30. The core 36 forms, inside each compressible collar 42, two orifices suitable for each receiving one end of a tube of the bundle.

Comme montré à la figure 4, l'échangeur de chaleur comprend aussi un faisceau 52 formé de deux rangées de tubes 54 de section non circulaire qui traversent une multiplicité d'ailettes parallèles 56. Les tubes 54 sont séparés deux à deux par un entraxe E au sein d'une même rangée et par un pas P d'une rangée à l'autre. Les tubes 54 possèdent des extrémités respectives 58 de forme non circulaire écartées l'une de l'autre avec le même entraxe et le même pas que les tubes.As shown in FIG. 4, the heat exchanger also comprises a bundle 52 formed of two rows of tubes 54 of non-circular section which pass through a multiplicity of parallel fins 56. The tubes 54 are separated in pairs by a center distance E within the same row and by a step P from one row to another. The tubes 54 have respective ends 58 of non-circular shape spaced from one another with the same center distance and the same pitch as the tubes.

Un échangeur de chaleur, tel qu'il vient d'être décrit jusqu'à présent, est décrit dans la Demande de brevet français mentionnée précédemment.A heat exchanger, as just described so far, is described in the French Patent Application mentioned above.

Conformément à l'invention, la région d'intersection 46 de la collerette 42 comprend tout d'abord une paire de surépaisseurs de matière 60 disposée à l'intérieur de chacune des deux parties annulaires 44 de la collerette 42 (figure 5). Dans le cas présent, les parties annulaires 44 sont prévues pour s'adapter chacune autour d'une extrémité 58 ayant, comme déjà indiqué, une section de forme générale ovale ou elliptique possédant un grand axe XX'.According to the invention, the intersection region 46 of the collar 42 firstly comprises a pair of thickeners of material 60 disposed inside each of the two annular parts 44 of the collar 42 (FIG. 5). In the present case, the annular parts 44 are provided to adapt each around an end 58 having, as already indicated, a generally oval or elliptical section with a major axis XX '.

Les surépaisseurs 60 de chaque paire sont disposées symétriquement par rapport à ce grand axe XX' du côté de l'extrémité de la section ovale ou elliptique qui se rattache à la région d'intersection 46.The extra thicknesses 60 of each pair are arranged symmetrically with respect to this major axis XX 'on the side of the end of the oval or elliptical section which is connected to the region of intersection 46.

Avant compression du joint, les surépaisseurs 60 sont délimitées par un bord droit qui constitue une corde empiétant sur la section ovale ou elliptique destinée à être occupée ensuite par une extrémité de tube 58.Before compression of the joint, the extra thicknesses 60 are delimited by a straight edge which constitutes a cord encroaching on the oval or elliptical section intended to be then occupied by one end of the tube 58.

Après mise en place d'une extrémité 58, la surépaisseur est comprimée et son bord initialement droit se trouve incurvé pour épouser la forme ovale ou elliptique de l'extrémité 58, comme montré en trait interrompu sur la figure 5.After fitting one end 58, the excess thickness is compressed and its initially straight edge is curved to match the oval or elliptical shape of the end 58, as shown in broken lines in FIG. 5.

Comme le montre également la figure 5, la région d'intersection 46 comprend aussi deux surépaisseurs de matière 62 disposées à l'extérieur de la collerette et propre à être comprimées par le bord du trou 30. Les surépaisseurs 62 limitent par conséquent la région d'intersection 46 dans une direction perpendiculaire à celle du grand axe XX'. Les surépaisseurs 62 relient chacune l'extérieur des deux parties annulaires 44. Les surépaisseurs 62 possèdent, avant compression du joint, une forme incurvée telle que représentée en trait plein sur la figure 5.As also shown in FIG. 5, the region of intersection 46 also comprises two extra thicknesses of material 62 arranged outside the flange and suitable for being compressed by the edge of the hole 30. The extra thicknesses 62 consequently limit the region d 'intersection 46 in a direction perpendicular to that of the major axis XX'. The extra thicknesses 62 each connect the outside of the two annular parts 44. The extra thicknesses 62 have, before compression of the joint, a curved shape as shown in solid lines in FIG. 5.

Après compression du joint, les deux surépaisseurs 62 se trouvent comprimées respectivement entre deux régions opposées de l'étranglement 30 du trou 26 (figure 1). Les deux surépaisseurs 62 viennent alors épouser la forme des deux régions opposées de l'étranglement 30 comme montré en trait interrompu sur la figure 5. Il en résulte que les deux surépaisseurs 62 se rapprochent l'une de l'autre ce qui comprime également le joint.After compression of the joint, the two extra thicknesses 62 are compressed respectively between two opposite regions of the throat 30 of the hole 26 (FIG. 1). The two extra thicknesses 62 then conform to the shape of the two opposite regions of the constriction 30 as shown in broken lines in FIG. 5. As a result, the two extra thicknesses 62 approach each other which also compresses the attached.

Ainsi, la région d'intersection 46 est comprimée non seulement dans la direction de l'axe XX', mais aussi dans une direction perpendiculaire à cet axe.Thus, the intersection region 46 is compressed not only in the direction of the axis XX ', but also in a direction perpendicular to this axis.

Les surépaisseurs 60 et 62 permettent ainsi de compenser le manque de compression dans le cas du joint décrit dans la Demande de Brevet français mentionnée plus haut.The extra thicknesses 60 and 62 thus make it possible to compensate for the lack of compression in the case of the seal described in the French Patent Application mentioned above.

Il est à noter que le taux de compression entre la collerette et l'extrémité du tube est sensiblement constant non seulement dans les parties annulaires 44, mais aussi dans la région d'intersection 46.It should be noted that the compression ratio between the flange and the end of the tube is substantially constant not only in the annular parts 44, but also in the region of intersection 46.

L'invention peut s'appliquer aussi à des échangeurs de chaleur dont les sections d'extrémités des tubes ont des formes différentes.The invention can also be applied to heat exchangers whose end sections of the tubes have different shapes.

Elle s'applique également à des échangeurs de chaleur comportant plus de deux rangées de tubes, dans lesquelles chacune des collerettes du joint comporte alors plus de deux parties annulaires et au moins deux régions d'intersection.It also applies to heat exchangers comprising more than two rows of tubes, in which each of the flanges of the joint then comprises more than two annular parts and at least two regions of intersection.

Claims (8)

Echangeur de chaleur du type comprenant un faisceau de tubes parallèles disposés en rangées, une plaque collectrice munies de trous recevant chacun les extrémités respectives de plusieurs tubes adjacents appartenant à des rangées différentes du faisceau, ainsi qu'un joint d'étanchéité compressible muni de collerettes dont chacune d'elles est placée dans un trou et comporte des parties annulaires entourant respectivement les extrémités des tubes reçues dans le trou, caractérisé en ce que les parties annulaires (44) de chaque collerette (42) du joint (34) se rejoignent deux à deux dans une région d'intersection (46) qui comporte des surépaisseurs de matière (60,62) propres à être comprimées entre le bord du trou (26) et les extrémités de tubes (58) qu'il reçoit.Heat exchanger of the type comprising a bundle of parallel tubes arranged in rows, a manifold plate provided with holes each receiving the respective ends of several adjacent tubes belonging to different rows of the bundle, as well as a compressible seal provided with flanges each of which is placed in a hole and has annular parts respectively surrounding the ends of the tubes received in the hole, characterized in that the annular parts (44) of each flange (42) of the seal (34) join two in pairs in an intersection region (46) which includes extra thicknesses of material (60,62) suitable for being compressed between the edge of the hole (26) and the ends of tubes (58) which it receives. Echangeur de chaleur selon la revendication 1, caractérisé en ce que la région d'intersection (46) de la collerette (42) comprend des surépaisseurs de matière (60) disposées à l'intérieur de la collerette et propres à être comprimées par les extrémités de tubes (58) reçues dans les parties annulaires (44) de la collerette.Heat exchanger according to claim 1, characterized in that the intersection region (46) of the flange (42) comprises extra thicknesses of material (60) arranged inside the flange and suitable for being compressed by the ends of tubes (58) received in the annular parts (44) of the collar. Echangeur de chaleur selon la revendication 2, caractérisé en ce que la région d'intersection (46) de la collerette (42) comprend une paire de surépaisseurs de matière (60) disposées à l'intérieur de chacune des parties annulaires (44) de la collerette.Heat exchanger according to claim 2, characterized in that the intersection region (46) of the flange (42) comprises a pair of material thickeners (60) arranged inside each of the annular parts (44) of the collar. Echangeur de chaleur selon la revendication 3, dans lequel la collerette (42) est prévue pour s'adapter sur des extrémités de tubes (58) ayant une section de forme générale ovale ou elliptique possédant un grand axe (XX'), caractérisé en ce que les surépaisseurs (60) de chaque paire sont disposées symétriquement de part et d'autre de ce grand axe.Heat exchanger according to claim 3, in which the flange (42) is designed to fit on the ends of tubes (58) having a generally oval or elliptical cross section having a large axis (XX '), characterized in that that the extra thicknesses (60) of each pair are arranged symmetrically on either side of this major axis. Echangeur de chaleur selon la revendication 1, caractérisé en ce que la région d'intersection (46) de la collerette (42) comprend des surépaisseurs de matière (62) disposées à l'extérieur de la collerette et propres à être comprimées par le bord du trou (26).Heat exchanger according to claim 1, characterized in that the intersection region (46) of the flange (42) comprises extra material (62) arranged outside the flange and suitable for being compressed by the edge of the hole (26). Echangeur de chaleur selon la revendication 5, caractérisé en ce qu'il comprend deux surépaisseurs de matière opposées (62) propres à être comprimées entre deux régions opposées du trou (26), formant un étranglement (30).Heat exchanger according to claim 5, characterized in that it comprises two opposite thicknesses of material (62) suitable for being compressed between two opposite regions of the hole (26), forming a constriction (30). Echangeur de chaleur selon l'une des revendications 1 à 6, caractérisé en ce que la région d'intersection (46) de la collerette comprend des surépaisseurs de matière (60) disposées à l'intérieur de la collerette et des surépaisseurs de matière (62) disposées à l'extérieur de la collerette.Heat exchanger according to one of claims 1 to 6, characterized in that the region of intersection (46) of the flange comprises material thicknesses (60) arranged inside the flange and material thicknesses ( 62) arranged outside the flange. Echangeur de chaleur selon l'une des revendications 1 à 7, caractérisé en ce que le taux de compression entre la collerette (42) du joint et l'extrémité du tube est sensiblement constant.Heat exchanger according to one of claims 1 to 7, characterized in that the compression ratio between the flange (42) of the seal and the end of the tube is substantially constant.
EP93401757A 1992-07-08 1993-07-06 Heat-exchanger with several rows of tubes, particularly for motor vehicles Withdrawn EP0578566A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9208481 1992-07-08
FR929208481A FR2693545B1 (en) 1992-07-08 1992-07-08 Heat exchanger with several rows of tubes, in particular for motor vehicles.

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EP0578566A1 true EP0578566A1 (en) 1994-01-12

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US (1) US5299636A (en)
EP (1) EP0578566A1 (en)
JP (1) JPH06174392A (en)
KR (1) KR940002595A (en)
BR (1) BR9302777A (en)
FR (1) FR2693545B1 (en)
MX (1) MX9304099A (en)

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FR2794852B1 (en) * 1999-06-08 2001-08-31 Valeo Thermique Moteur Sa HEAT EXCHANGER COMPRISING A ROW OF TUBES THROUGH HOLES OF A COLLECTING PLATE
EP1195570B1 (en) 2000-10-06 2003-08-20 Visteon Global Technologies, Inc. Method of making a tube for a heat exchanger
JP4109444B2 (en) * 2001-11-09 2008-07-02 Gac株式会社 Heat exchanger and manufacturing method thereof
DE10322211A1 (en) * 2003-05-16 2004-12-02 Modine Manufacturing Co., Racine heat exchanger block
US7461689B2 (en) * 2004-06-01 2008-12-09 Modine Manufacturing Company Thermal cycling resistant tube to header joint for heat exchangers
US9328966B2 (en) * 2007-11-01 2016-05-03 Modine Manufacturing Company Heat exchanger with a baffle reinforcement member
DE112008002905T5 (en) * 2007-11-01 2010-12-30 Modine Manufacturing Co., Racine heat exchangers
DE102009049483A1 (en) * 2009-10-15 2011-04-21 Modine Manufacturing Co., Racine Heat exchanger and seal arrangement for it
US9309839B2 (en) 2010-03-18 2016-04-12 Modine Manufacturing Company Heat exchanger and method of manufacturing the same
AU2011201083B2 (en) * 2010-03-18 2013-12-05 Modine Manufacturing Company Heat exchanger and method of manufacturing the same
US20120031601A1 (en) * 2010-08-03 2012-02-09 Johnson Controls Technology Company Multichannel tubes with deformable webs
DE102011076172A1 (en) * 2011-05-20 2012-11-22 J. Eberspächer GmbH & Co. KG Finned heat exchangers
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Also Published As

Publication number Publication date
JPH06174392A (en) 1994-06-24
FR2693545A1 (en) 1994-01-14
KR940002595A (en) 1994-02-17
FR2693545B1 (en) 1994-09-30
MX9304099A (en) 1994-02-28
US5299636A (en) 1994-04-05
BR9302777A (en) 1994-02-08

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