EP0567401B1 - Heat exchanger having a bundle of finned tubes immobilized with a header box - Google Patents

Heat exchanger having a bundle of finned tubes immobilized with a header box Download PDF

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Publication number
EP0567401B1
EP0567401B1 EP93401037A EP93401037A EP0567401B1 EP 0567401 B1 EP0567401 B1 EP 0567401B1 EP 93401037 A EP93401037 A EP 93401037A EP 93401037 A EP93401037 A EP 93401037A EP 0567401 B1 EP0567401 B1 EP 0567401B1
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EP
European Patent Office
Prior art keywords
bundle
plate
header
heat exchanger
tubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93401037A
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German (de)
French (fr)
Other versions
EP0567401A1 (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
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Valeo Thermique Moteur SA
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Publication of EP0567401A1 publication Critical patent/EP0567401A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—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
    • 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
    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • 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

Definitions

  • the invention relates to a heat exchanger, in particular for motor vehicles, of the type comprising a bundle of finned tubes immobilized relative to a collector-water box assembly.
  • the seal between the ends of the tubes and the edges of the manifold holes is generally ensured by a sheet of elastomer or similar material which covers the manifold and which has collars each of which is engaged between a end of a tube and the edge of a manifold hole.
  • the immobilization means provided in document FR-A-2 560 368 make it possible to establish a rigid connection between the beam and the collector, which is thus opposed to the relative displacements mentioned previously.
  • the immobilization means require to practice notches along the longitudinal edges of the fins or else to provide aligned openings formed through them, which means that structural fins have to be used. particular.
  • the means for immobilizing the aforementioned document comprise tabs molded in one piece with the water box or with the collector, or else fingers molded in one piece with the collector, which makes it necessary to manufacture specific parts by plastic molding.
  • the object of the invention is in particular to overcome the drawbacks mentioned above.
  • the invention proposes, for this purpose, a heat exchanger of the type comprising a bundle of tubes provided with fins, in which the ends of the tubes are sealingly mounted in the holes of a manifold, on which a box is fixed. water, and in which immobilization means are provided to oppose relative movement, in particular by pivoting or twisting, of the beam relative to the collector, said immobilization means comprising at least one attached element, interposed between the harness and the collector-water box assembly, comprising a first part suitable for bearing on the manifold-water box assembly and a second part extending parallel to the direction of the tubes of the bundle and suitable for bearing on opposite longitudinal edges of a group of several fins, adjacent to the manifold, characterized in that the immobilization means comprise at least one pair of opposite elements, each of which comprises a first part in the form of a leg suitable for being fixed to the water box (28) and a second part in the form of legs s' extending parallel to the direction of the bundle tubes.
  • the heat exchanger uses at least one insert to immobilize the beam relative to the collector, it is not necessary to provide fins of particular structure or to modify the structure of the collector-water box assembly .
  • first part and the second part of each element extend in substantially parallel planes with one another and these two parts are connected by a web.
  • each element is advantageously fixed to a boss of the water box, for example by means of a screw or other similar fixing member.
  • the immobilization means comprise a plate capable of being interposed flat between the collector and the group of fins, this plate having at least one opening for the passage of tubes of the bundle and with at least two attached legs perpendicular to the plate and adapted to bear respectively on two opposite longitudinal sides of the beam.
  • the plate is adapted to bear under a peripheral rim projecting from the collector.
  • the plate is suitable for bearing under a central part of the collector, which is framed by a projecting peripheral rim.
  • the plate and the legs which depend on it are advantageously formed in one piece, either from a stamped metal sheet, or by molding of a suitable plastic.
  • the heat exchanger partially shown in FIG. 1 comprises a bundle 10 formed of a single row of aligned tubes 12, provided with planar fins 14 parallel to each other and extending perpendicular to the direction of the tubes 12.
  • the tubes 12 have, in the example, a body of oblong cross-section and have circular cylindrical ends 16. The latter are mounted in leaktight manner in the holes 18 of a manifold 20, also called "hole plate".
  • the manifold 20 has a peripheral rim 22 formed projecting and terminated by crimping lugs 24.
  • the lugs 24 are folded over the peripheral rim 26 of a water box 28 which, in the example, is formed by molding a plastic material. Sealing at the ends 16 of the tubes 12 is ensured by a sheet 30 of elastomer or similar material, which covers one face of the collector and which includes collars 32 clamped between the ends 16 of the tubes and the edges 34 of the holes in the collector .
  • the water box 28 defines with the collector 20 an internal volume 36.
  • the collector as just described so far, is of a conventional structure.
  • Another collector-water box assembly of similar structure is generally mounted at the other end of the tubes.
  • the heat exchanger comprises a single row of tubes, it can happen that the collector-water box assembly moves, by pivoting or twisting, which can cause cuts at the collars 32, whence risk of leakage of the fluid circulating in the heat exchanger.
  • the invention makes it possible to overcome these drawbacks by means of immobilization which, in the example, comprise at least one pair of opposite elements 38 arranged on either side of the collector.
  • Each of the elements 38 comprises a first part 40 in the form of a rectilinear tab and suitable for being fixed to the water box 28 by means of a screw 42 passing through the tab 40 and engaging in a boss 45 molded with the box. water.
  • the first part 40 extends in a substantially parallel direction of the tubes and it is connected to a second part 44 which extends parallel to the direction of the tubes of the bundle and which is able to bear on the longitudinal edges of a group of several fins 14, adjacent to the manifold.
  • the parts 40 and 44 are connected together by a veil 46 suitable for possibly taking support under the flange 22 of the collector 20.
  • the water box 28 thus comprises at least one pair of two opposite bosses 45, on which two elements 38 are fixed respectively.
  • the respective parts 44 of the two elements 38 come to bear on two opposite longitudinal sides 48 of the bundle.
  • the heat exchanger includes fins, a manifold and a standard type water box.
  • At least one insert 50 comprising a plate 52 of generally rectangular shape suitable for being interposed flat between the flange 22 of the manifold 20 and the group of fins, that is to say the fin closest to the collector.
  • the plate 52 has at least one opening 54, for example of generally rectangular shape, for the passage of at least one tube 12 of the bundle.
  • the insert 50 comprises at least two opposite tabs 56 attached perpendicularly to the plate 52 and adapted to bear respectively on the two opposite longitudinal sides 48 of the beam. Legs 56 thus play the same role that the parts 44 in the form of legs of the heat exchanger of FIG. 1.
  • the insert 50 is, in the example, formed in one piece from a stamped metal sheet, for example an aluminum sheet.
  • the element 50 is simply interposed for mounting between the tube bundle and the manifold.
  • the heat exchanger comprises at least one insert 60 which is similar to the element 50 in FIG. 2.
  • the insert 60 comprises a plate 62 of generally rectangular shape suitable for bearing under the collector 20, and more particularly in the central region of the latter as delimited by the peripheral rim 22.
  • the plate 62 has, in the example, three openings 64 of rectangular shape each intended to allow passage to a tube of the bundle.
  • the insert 60 further comprises two legs 66 attached perpendicularly to the plate 62 and adapted to bear respectively on the two longitudinal sides 48 of the beam.
  • the legs 66 thus play the same role as the legs 56 of the embodiment of FIG. 2.
  • the element 60 as constituted by the plate 62 and the two tabs 66, is formed in one piece by molding a plastic material. As in the case of FIG. 2, the element 60 is interposed for mounting between the last fin of the bundle and the manifold.
  • the invention thus makes it possible to produce, in a particularly simple manner, a heat exchanger in which the bundle of tubes is perfectly immobilized relative to the manifold-water box assembly. This prevents the appearance of relative movements likely to occur especially in the heat exchangers with a single row of tubes.
  • the invention applies very particularly to heat exchangers for motor vehicles, in particular to engine cooling radiators, or to passenger compartment heating radiators.

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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)

Description

L'invention concerne un échangeur de chaleur, en particulier pour véhicules automobiles, du type comportant un faisceau de tubes à ailettes immobilisé par rapport à un ensemble collecteur-boîte à eau.The invention relates to a heat exchanger, in particular for motor vehicles, of the type comprising a bundle of finned tubes immobilized relative to a collector-water box assembly.

On connaît déjà, d'après FR-A-2 560 368, un échangeur de chaleur de ce type dans lequel les extrémités des tubes sont montées à étanchéité dans les trous d'un collecteur sur lequel est fixée une boîte à eau, et dans lequel des moyens d'immobilisation sont prévus pour s'opposer à un déplacement relatif, en particulier par pivotement ou torsion, du faisceau de tubes par rapport au collecteur.Already known, from FR-A-2 560 368, a heat exchanger of this type in which the ends of the tubes are sealingly mounted in the holes of a collector on which a water box is fixed, and in which immobilization means are provided to oppose a relative movement, in particular by pivoting or twisting, of the bundle of tubes relative to the manifold.

Dans les échangeurs de chaleur du type précité, l'étanchéité entre les extrémités des tubes et les bords des trous du collecteur est généralement assurée par une feuille en élastomère ou matière analogue qui recouvre le collecteur et qui présente des collets dont chacun est engagé entre une extrémité d'un tube et le bord d'un trou du collecteur.In heat exchangers of the aforementioned type, the seal between the ends of the tubes and the edges of the manifold holes is generally ensured by a sheet of elastomer or similar material which covers the manifold and which has collars each of which is engaged between a end of a tube and the edge of a manifold hole.

Lorsqu'un tel échangeur de chaleur est manipulé avant ou pendant son montage dans un véhicule, ou lorsqu'il a été monté dans un véhicule, il peut se produire des mouvements relatifs, en particulier par pivotement ou torsion, du faisceau de tubes par rapport au collecteur. Ces mouvements, qui sont susceptibles de se produire surtout dans les échangeurs de chaleur à une seule rangée de tubes alignés, sont nuisibles à l'étanchéité entre les extrémités des tubes et les bords des trous du collecteur.When such a heat exchanger is handled before or during its mounting in a vehicle, or when it has been mounted in a vehicle, relative movements, in particular by pivoting or twisting, of the bundle of tubes may occur. to the collector. These movements, which are likely to occur especially in heat exchangers with a single row of aligned tubes, are detrimental to the seal between the ends of the tubes and the edges of the manifold holes.

Les moyens d'immobilisation prévus dans le document FR-A-2 560 368 permettent d'établir une liaison rigide entre le faisceau et le collecteur, qui s'oppose ainsi aux déplacements relatifs mentionnés précédemment.The immobilization means provided in document FR-A-2 560 368 make it possible to establish a rigid connection between the beam and the collector, which is thus opposed to the relative displacements mentioned previously.

Toutefois, dans cet échangeur de chaleur connu, les moyens d'immobilisation nécessitent de pratiquer des encoches le long des bords longitudinaux des ailettes ou encore de prévoir des ouvertures alignées ménagées au travers de celles-ci, ce qui oblige à utiliser des ailettes de structure particulière.However, in this known heat exchanger, the immobilization means require to practice notches along the longitudinal edges of the fins or else to provide aligned openings formed through them, which means that structural fins have to be used. particular.

De plus, les moyens d'immobilisation du document précité comportent des pattes moulées d'une seule pièce avec la boîte à eau ou avec le collecteur, ou encore des doigts moulés d'une seule pièce avec le collecteur, ce qui oblige à fabriquer des pièces spécifiques par moulage de matière plastique.In addition, the means for immobilizing the aforementioned document comprise tabs molded in one piece with the water box or with the collector, or else fingers molded in one piece with the collector, which makes it necessary to manufacture specific parts by plastic molding.

L'invention a notamment pour but de surmonter les inconvénients mentionnés ci-dessus.The object of the invention is in particular to overcome the drawbacks mentioned above.

C'est en particulier un but de l'invention de procurer un échangeur de chaleur du type mentionné ci-dessus, qui utilise des ailettes standards.It is in particular an object of the invention to provide a heat exchanger of the type mentioned above, which uses standard fins.

C'est encore un but de l'invention de procurer un tel échangeur de chaleur qui ne nécessite pas ou pratiquement pas de modifications de l'ensemble collecteur-boîte à eau.It is also an object of the invention to provide such a heat exchanger which does not require or practically no modifications to the collector-water box assembly.

C'est encore un but de l'invention de procurer un tel échangeur de chaleur qui peut être fabriqué facilement et à bas prix.It is also an object of the invention to provide such a heat exchanger which can be manufactured easily and at low cost.

L'invention propose, à cet effet, un échangeur de chaleur du type comprenant un faisceau de tubes munis d'ailettes, dans lequel les extrémités des tubes sont montées à étanchéité dans les trous d'un collecteur, sur lequel est fixée une boîte à eau, et dans lequel des moyens d'immobilisation sont prévus pour s'opposer à un déplacement relatif, en particulier par pivotement ou torsion, du faisceau par rapport au collecteur, lesdits moyens d'immobilisation comprenant au moins un élément rapporté, interposé entre le faisceau et l'ensemble collecteur-boîte à eau, comportant une première partie propre à prendre appui sur l'ensemble collecteur-boîte à eau et une seconde partie s'étendant parallèlement à la direction des tubes du faisceau et propre à prendre appui sur des bords longitudinaux opposés d'un groupe de plusieurs ailettes, adjacent au collecteur, caractérisé en ce que les moyens d'immobilisation comprennent au moins une paire d'éléments opposés dont chacun comporte une première partie en forme de patte propre à être fixée sur la boîte à eau (28) et une seconde partie en forme de pattes s'étendant parallèlement à la direction des tubes du faisceau.The invention proposes, for this purpose, a heat exchanger of the type comprising a bundle of tubes provided with fins, in which the ends of the tubes are sealingly mounted in the holes of a manifold, on which a box is fixed. water, and in which immobilization means are provided to oppose relative movement, in particular by pivoting or twisting, of the beam relative to the collector, said immobilization means comprising at least one attached element, interposed between the harness and the collector-water box assembly, comprising a first part suitable for bearing on the manifold-water box assembly and a second part extending parallel to the direction of the tubes of the bundle and suitable for bearing on opposite longitudinal edges of a group of several fins, adjacent to the manifold, characterized in that the immobilization means comprise at least one pair of opposite elements, each of which comprises a first part in the form of a leg suitable for being fixed to the water box (28) and a second part in the form of legs s' extending parallel to the direction of the bundle tubes.

Du fait que l'échangeur de chaleur utilise au moins un élément rapporté pour immobiliser le faisceau par rapport au collecteur, il n'est pas nécessaire de prévoir des ailettes de structure particulière ni de modifier la structure de l'ensemble collecteur-boîte à eau.Because the heat exchanger uses at least one insert to immobilize the beam relative to the collector, it is not necessary to provide fins of particular structure or to modify the structure of the collector-water box assembly .

On peut ainsi utiliser des ailettes standards. Lors du montage de l'échangeur de chaleur, il suffit d'interposer au moins un élément d'immobilisation entre le faisceau et l'ensemble collecteur-boîte à eau.It is thus possible to use standard fins. When mounting the heat exchanger, it suffices to interpose at least one immobilizing element between the bundle and the collector-water box assembly.

Avantageusement, la première partie et la seconde partie de chaque élément s'étendent dans des plans sensiblement parallèles entre eux et ces deux parties sont reliées par un voile.Advantageously, the first part and the second part of each element extend in substantially parallel planes with one another and these two parts are connected by a web.

La première partie de chaque élément est avantageusement fixée sur un bossage de la boîte à eau, par exemple au moyen d'une vis ou autre organe de fixation analogue.The first part of each element is advantageously fixed to a boss of the water box, for example by means of a screw or other similar fixing member.

Dans une seconde forme de réalisation de l'invention, les moyens d'immobilisation comprennent une plaque propre à être interposée à plat entre le collecteur et le groupe d'ailettes, cette plaque possédant au moins une ouverture pour le passage de tubes du faisceau et comportant au moins deux pattes rattachées perpendiculairement à la plaque et propres à prendre appui respectivement sur deux côtés longitudinaux opposés du faisceau.In a second embodiment of the invention, the immobilization means comprise a plate capable of being interposed flat between the collector and the group of fins, this plate having at least one opening for the passage of tubes of the bundle and with at least two attached legs perpendicular to the plate and adapted to bear respectively on two opposite longitudinal sides of the beam.

Il suffit, lors du montage de l'échangeur de chaleur, d'interposer cette plaque entre le faisceau et le collecteur pour assurer ensuite l'immobilisation du faisceau par rapport à l'ensemble collecteur-boîte à eau.It is sufficient, during assembly of the heat exchanger, to interpose this plate between the bundle and the collector to ensure then immobilization of the beam relative to the collector-water box assembly.

Dans une première variante, la plaque est propre à prendre appui sous un rebord périphérique en saillie du collecteur.In a first variant, the plate is adapted to bear under a peripheral rim projecting from the collector.

Dans une autre variante, la plaque est propre à prendre appui sous une partie centrale du collecteur, qui est encadrée par un rebord périphérique en saillie.In another variant, the plate is suitable for bearing under a central part of the collector, which is framed by a projecting peripheral rim.

La plaque et les pattes qui en dépendent sont avantageusement formées d'une seule pièce, soit à partir d'une tôle métallique emboutie, soit encore par moulage d'une matière plastique appropriée.The plate and the legs which depend on it are advantageously formed in one piece, either from a stamped metal sheet, or by molding of a suitable plastic.

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

  • la figure 1 est une vue partielle en coupe transversale d'un échangeur de chaleur selon une première forme de réalisation de l'invention;
  • la figure 2 est une vue partielle en coupe transversale d'un échangeur de chaleur selon une seconde forme de réalisation de l'invention;
  • la figure 3 est une vue partielle en coupe transversale, selon la ligne III-III de la figure 4, d'un échangeur de chaleur selon une troisième forme de réalisation de l'invention, qui constitue une variante de la forme de réalisation de la figure 2; et
  • la figure 4 est une vue partielle en élévation de la plaque d'immobilisation de l'échangeur de chaleur de la figure 3, appliquée sur les ailettes du faisceau.
In the description which follows, given by way of example, reference is made to the appended drawing, in which:
  • Figure 1 is a partial cross-sectional view of a heat exchanger according to a first embodiment of the invention;
  • Figure 2 is a partial cross-sectional view of a heat exchanger according to a second embodiment of the invention;
  • Figure 3 is a partial cross-sectional view, along line III-III of Figure 4, of a heat exchanger according to a third embodiment of the invention, which constitutes a variant of the embodiment of the Figure 2; and
  • Figure 4 is a partial elevational view of the immobilizing plate of the heat exchanger of Figure 3, applied to the fins of the bundle.

L'échangeur de chaleur représenté partiellement sur la figure 1 comprend un faisceau 10 formé d'une seule rangée de tubes 12 alignés, munis d'ailettes planes 14 parallèles entre elles et s'étendant perpendiculairement à la direction des tubes 12. Les tubes 12 ont, dans l'exemple, un corps de section oblongue et possèdent des extrémités cylindriques circulaires 16. Ces dernières sont montées à étanchéité dans les trous 18 d'un collecteur 20, encore appelé "plaque à trous".The heat exchanger partially shown in FIG. 1 comprises a bundle 10 formed of a single row of aligned tubes 12, provided with planar fins 14 parallel to each other and extending perpendicular to the direction of the tubes 12. The tubes 12 have, in the example, a body of oblong cross-section and have circular cylindrical ends 16. The latter are mounted in leaktight manner in the holes 18 of a manifold 20, also called "hole plate".

Le collecteur 20 comporte un rebord périphérique 22 formé en saillie et terminé par des pattes de sertissage 24. Les pattes 24 sont rabattues sur le rebord périphérique 26 d'une boîte à eau 28 qui, dans l'exemple, est formée par moulage d'une matière plastique. L'étanchéité au niveau des extrémités 16 des tubes 12 est assurée par une feuille 30 en élastomère ou matière analogue, qui recouvre une face du collecteur et qui comprend des collets 32 serrés entre les extrémités 16 des tubes et les bords 34 des trous du collecteur. La boîte à eau 28 délimite avec le collecteur 20 un volume interne 36.The manifold 20 has a peripheral rim 22 formed projecting and terminated by crimping lugs 24. The lugs 24 are folded over the peripheral rim 26 of a water box 28 which, in the example, is formed by molding a plastic material. Sealing at the ends 16 of the tubes 12 is ensured by a sheet 30 of elastomer or similar material, which covers one face of the collector and which includes collars 32 clamped between the ends 16 of the tubes and the edges 34 of the holes in the collector . The water box 28 defines with the collector 20 an internal volume 36.

Le collecteur, tel qu'il vient d'être décrit jusqu'à présent, est d'une structure classique. A l'autre extrémité des tubes est généralement monté un autre ensemble collecteur-boîte à eau de structure analogue.The collector, as just described so far, is of a conventional structure. Another collector-water box assembly of similar structure is generally mounted at the other end of the tubes.

Du fait que l'échangeur de chaleur comprend une seule rangée de tubes, il peut arriver que l'ensemble collecteur-boîte à eau se déplace, par pivotement ou torsion, ce qui peut occasionner des coupures au niveau des collets 32, d'où des risques de fuite du fluide circulant dans l'échangeur de chaleur.Because the heat exchanger comprises a single row of tubes, it can happen that the collector-water box assembly moves, by pivoting or twisting, which can cause cuts at the collars 32, whence risk of leakage of the fluid circulating in the heat exchanger.

L'invention permet de surmonter ces inconvénients grâce à des moyens d'immobilisation qui, dans l'exemple, comprennent au moins une paire d'éléments opposés 38 disposés de part et d'autre du collecteur. Chacun des éléments 38 comporte une première partie 40 en forme de patte rectiligne et propre à être fixée sur la boîte à eau 28 au moyen d'une vis 42 traversant la patte 40 et s'engageant dans un bossage 45 venu de moulage avec la boîte à eau.The invention makes it possible to overcome these drawbacks by means of immobilization which, in the example, comprise at least one pair of opposite elements 38 arranged on either side of the collector. Each of the elements 38 comprises a first part 40 in the form of a rectilinear tab and suitable for being fixed to the water box 28 by means of a screw 42 passing through the tab 40 and engaging in a boss 45 molded with the box. water.

La première partie 40 s'étend dans une direction sensiblement parallèle des tubes et elle se raccorde à une seconde partie 44 qui s'étend parallèlement à la direction des tubes du faisceau et qui est propre à prendre appui sur les bords longitudinaux d'un groupe de plusieurs ailettes 14, adjacent au collecteur. Les parties 40 et 44 sont reliées entre elles par un voile 46 propre à prendre éventuellement appui sous le rebord 22 du collecteur 20.The first part 40 extends in a substantially parallel direction of the tubes and it is connected to a second part 44 which extends parallel to the direction of the tubes of the bundle and which is able to bear on the longitudinal edges of a group of several fins 14, adjacent to the manifold. The parts 40 and 44 are connected together by a veil 46 suitable for possibly taking support under the flange 22 of the collector 20.

La boîte à eau 28 comporte ainsi au moins une paire de deux bossages 45 opposés, sur lesquels sont fixés respectivement deux éléments 38. Les parties 44 respectives des deux éléments 38 viennent en appui sur deux côtés longitudinaux opposés 48 du faisceau.The water box 28 thus comprises at least one pair of two opposite bosses 45, on which two elements 38 are fixed respectively. The respective parts 44 of the two elements 38 come to bear on two opposite longitudinal sides 48 of the bundle.

Dans cette première forme de réalisation de l'invention, on peut utiliser un collecteur et des ailettes standards. Il suffit simplement de prévoir une boîte à eau de structure particulière comportant au moins une paire de bossages.In this first embodiment of the invention, it is possible to use a manifold and standard fins. It suffices simply to provide a water box with a particular structure comprising at least one pair of bosses.

Dans la forme de réalisation de la figure 2, à laquelle on se réfère maintenant, l'échangeur de chaleur comporte des ailettes, un collecteur et une boîte à eau de type standard.In the embodiment of Figure 2, to which we now refer, the heat exchanger includes fins, a manifold and a standard type water box.

L'immobilisation entre le faisceau 10 et l'ensemble collecteur 20-boîte à eau 28 est ici assurée par au moins un élément rapporté 50 comprenant une plaque 52 de forme générale rectangulaire propre à être interposée à plat entre le rebord 22 du collecteur 20 et le groupe d'ailettes, c'est-à-dire l'ailette la plus proche du collecteur. La plaque 52 comporte au moins une ouverture 54, par exemple de forme générale rectangulaire, pour le passage d'au moins un tube 12 du faisceau.Immobilization between the bundle 10 and the manifold assembly 20-water box 28 is here provided by at least one insert 50 comprising a plate 52 of generally rectangular shape suitable for being interposed flat between the flange 22 of the manifold 20 and the group of fins, that is to say the fin closest to the collector. The plate 52 has at least one opening 54, for example of generally rectangular shape, for the passage of at least one tube 12 of the bundle.

L'élément rapporté 50 comporte au moins deux pattes opposées 56 rattachées perpendiculairement à la plaque 52 et propres à prendre appui respectivement sur les deux côtés longitudinaux opposés 48 du faisceau. Les pattes 56 jouent ainsi le même rôle que les parties 44 en forme de pattes de l'échangeur de chaleur de la figure 1.The insert 50 comprises at least two opposite tabs 56 attached perpendicularly to the plate 52 and adapted to bear respectively on the two opposite longitudinal sides 48 of the beam. Legs 56 thus play the same role that the parts 44 in the form of legs of the heat exchanger of FIG. 1.

L'élément rapporté 50 est, dans l'exemple, formé d'une seule pièce en une tôle métallique emboutie, par exemple une tôle en aluminium. L'élément 50 est simplement interposé au montage entre le faisceau de tubes et le collecteur.The insert 50 is, in the example, formed in one piece from a stamped metal sheet, for example an aluminum sheet. The element 50 is simply interposed for mounting between the tube bundle and the manifold.

Dans la forme de réalisation des figures 3 et 4, auxquelles on se réfère maintenant, l'échangeur de chaleur comporte au moins un élément rapporté 60 qui s'apparente à l'élément 50 de la figure 2.In the embodiment of FIGS. 3 and 4, to which reference is now made, the heat exchanger comprises at least one insert 60 which is similar to the element 50 in FIG. 2.

L'élément rapporté 60 comporte une plaque 62 de forme générale rectangulaire propre à prendre appui sous le collecteur 20, et plus particulièrement dans la région centrale de celui-ci telle que délimitée par le rebord périphérique 22. La plaque 62 possède, dans l'exemple, trois ouvertures 64 de forme rectangulaire destinées chacune à laisser passage à un tube du faisceau.The insert 60 comprises a plate 62 of generally rectangular shape suitable for bearing under the collector 20, and more particularly in the central region of the latter as delimited by the peripheral rim 22. The plate 62 has, in the example, three openings 64 of rectangular shape each intended to allow passage to a tube of the bundle.

L'élément rapporté 60 comprend en outre deux pattes 66 rattachées perpendiculairement à la plaque 62 et propres à prendre appui respectivement sur les deux côtés longitudinaux 48 du faisceau. Les pattes 66 jouent ainsi le même rôle que les pattes 56 de la forme de réalisation de la figure 2.The insert 60 further comprises two legs 66 attached perpendicularly to the plate 62 and adapted to bear respectively on the two longitudinal sides 48 of the beam. The legs 66 thus play the same role as the legs 56 of the embodiment of FIG. 2.

Dans l'exemple, l'élément 60, tel que constitué par la plaque 62 et les deux pattes 66, est formé d'une seule pièce par moulage d'une matière plastique. Comme dans le cas de la figure 2, l'élément 60 est interposé au montage entre la dernière ailette du faisceau et le collecteur.In the example, the element 60, as constituted by the plate 62 and the two tabs 66, is formed in one piece by molding a plastic material. As in the case of FIG. 2, the element 60 is interposed for mounting between the last fin of the bundle and the manifold.

L'invention permet ainsi de réaliser, de manière particulièrement simple, un échangeur de chaleur dans lequel le faisceau de tubes est parfaitement immobilisé par rapport à l'ensemble collecteur-boîte à eau. On empêche ainsi l'apparition de mouvements relatifs susceptibles de se produire surtout dans le cas des échangeurs de chaleur comportant une seule rangée de tubes.The invention thus makes it possible to produce, in a particularly simple manner, a heat exchanger in which the bundle of tubes is perfectly immobilized relative to the manifold-water box assembly. This prevents the appearance of relative movements likely to occur especially in the heat exchangers with a single row of tubes.

L'invention s'applique tout particulièrement aux échangeurs de chaleur pour véhicules automobiles, notamment aux radiateurs de refroidissement du moteur, ou aux radiateurs de chauffage de l'habitacle.The invention applies very particularly to heat exchangers for motor vehicles, in particular to engine cooling radiators, or to passenger compartment heating radiators.

Claims (8)

  1. A heat exchanger of the type comprising a bundle (10) of tubes (12) having fins (14), in which the end portions (16) of the tubes (12) are sealingly mounted in the holes (18) of a header plate (20) on to which a header casing (28) is fitted, and in which locating means are arranged for resisting any relative displacement, in particular by pivoting or torsion, of the bundle (10) with respect to the header plate (20), the said locating means comprising at least one applied element (38; 50; 60) interposed between the bundle (10) and the assembly consisting of the header plate (20) and the header casing (28), and including a first portion (40; 52; 62) adapted to engage on the assembly consisting of the header plate (20) and the header casing (28), together with a second portion (44; 56; 66) extending parallel to the direction of the tubes of the bundle and adapted to engage on opposed longitudinal edges (48) of a group of several fins adjacent to the header plate, characterised in that the locating means comprise at least one pair of opposed elements (38), each of which includes a first portion (40) in the form of a lug, adapted to be fixed on the header casing (28), together with a second portion (44) in the form of lugs extending parallel to the direction of the tubes (12) of the bundle.
  2. A heat exchanger according to Claim 1,
    characterised in that the first portion (40) and the second portion (44) lie in planes substantially parallel to each other, and are joined together by a web (46).
  3. A heat exchanger according to Claim 1 or Claim 2,
    characterised in that the first portion (40) of each element (38) is fixed on a boss (45) of the header casing (28), for example by means of a screw (42).
  4. A heat exchanger of the type comprising a bundle (10) of tubes (12) having fins (14), in which the end portions (16) of the tubes (12) are sealingly mounted in the holes (18) of a header plate (20) on to which a header casing (28) is fitted, and in which locating means are arranged for resisting any relative displacement, in particular by pivoting or torsion, of the bundle (10) with respect to the header plate (20), the said locating means comprising at least one applied element (38; 50; 60) interposed between the bundle (10) and the assembly consisting of the header plate (20) and the header casing (28), and including a first portion (40; 52; 62) adapted to engage on the assembly consisting of the header plate (20) and the header casing (28), together with a second portion (44; 56; 66) extending parallel to the direction of the tubes of the bundle and adapted to engage on opposed longitudinal edges (48) of a group of several fins adjacent to the header plate, characterised in that the locating means comprise at least one applied element (50; 60) including a plate element (52; 62) which is adapted to be interposed flat between the header plate (20) and the group of fins, the said plate element having at least one aperture (54; 64) for the passage of tubes of the bundle through it, and including at least two opposed lugs (56; 66), which are attached at right angles to the plate element (52; 62) and which are adapted to engage respectively on the two longitudinal sides (48) of the bundle.
  5. A heat exchanger according to Claim 4,
    characterised in that the plate element (52) is adapted to engage under a peripheral flange (22) of the header plate (20).
  6. A heat exchanger according to Claim 4,
    characterised in that the plate element (62) is adapted to engage on a central portion of the header plate (20), flanked by a peripheral flange (22).
  7. A heat exchanger according to one of Claims 4 to 6,
    characterised in that the plate element (52) and the lugs (56) that depend from it are formed as a single piece from press formed metallic plate.
  8. A heat exchanger according to one of Claims 4 to 6,
    characterised in that the plate element (62) and the lugs (66) that depend from it are formed as a single piece by moulding in a plastics material.
EP93401037A 1992-04-21 1993-04-21 Heat exchanger having a bundle of finned tubes immobilized with a header box Expired - Lifetime EP0567401B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9204861A FR2690230B1 (en) 1992-04-21 1992-04-21 HEAT EXCHANGER COMPRISING A FIXED TUBE BEAM IMMOBILIZED IN RELATION TO A COLLECTOR-WATER BOX ASSEMBLY.
FR9204861 1992-04-21

Publications (2)

Publication Number Publication Date
EP0567401A1 EP0567401A1 (en) 1993-10-27
EP0567401B1 true EP0567401B1 (en) 1996-07-10

Family

ID=9429070

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Application Number Title Priority Date Filing Date
EP93401037A Expired - Lifetime EP0567401B1 (en) 1992-04-21 1993-04-21 Heat exchanger having a bundle of finned tubes immobilized with a header box

Country Status (5)

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US (1) US5355944A (en)
EP (1) EP0567401B1 (en)
DE (1) DE69303535T2 (en)
ES (1) ES2089750T3 (en)
FR (1) FR2690230B1 (en)

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FR2740869B1 (en) * 1995-11-02 1997-12-19 Valeo Thermique Moteur Sa HEAT EXCHANGER WITH TUBES OF OVAL OR OBLONG SECTION AND ITS ASSEMBLY METHOD
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Also Published As

Publication number Publication date
DE69303535T2 (en) 1996-10-31
ES2089750T3 (en) 1996-10-01
DE69303535D1 (en) 1996-08-14
FR2690230B1 (en) 1994-06-03
EP0567401A1 (en) 1993-10-27
FR2690230A1 (en) 1993-10-22
US5355944A (en) 1994-10-18

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