EP0454559B1 - Header box with expansion chamber for a heat exchanger, for example a cooler, and heat-exchanger having such a device - Google Patents

Header box with expansion chamber for a heat exchanger, for example a cooler, and heat-exchanger having such a device Download PDF

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Publication number
EP0454559B1
EP0454559B1 EP19910401061 EP91401061A EP0454559B1 EP 0454559 B1 EP0454559 B1 EP 0454559B1 EP 19910401061 EP19910401061 EP 19910401061 EP 91401061 A EP91401061 A EP 91401061A EP 0454559 B1 EP0454559 B1 EP 0454559B1
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EP
European Patent Office
Prior art keywords
water header
connecting pipe
combination according
expansion vessel
bundle
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
EP19910401061
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German (de)
French (fr)
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EP0454559A1 (en
Inventor
Roberto Sussetto
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 EP0454559A1 publication Critical patent/EP0454559A1/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
    • F28F9/0231—Header boxes having an expansion chamber

Definitions

  • the invention relates to a water box and expansion tank device for a heat exchanger, in particular for a radiator of a cooling circuit of an internal combustion engine. It also relates to a heat exchanger comprising such a device.
  • a water box and expansion tank device for a heat exchanger of the type comprising a water box available general vertical suitable for being mounted at one end of a bundle of horizontal tubes, as well as an expansion tank provided at the upper end of the water box and extending horizontally beyond it.
  • This known device is in one piece, the expansion tank being molded in one piece with the water box.
  • this device is complex to manufacture in practice, because it is necessary to make the expansion tank in two parts, namely a lower part molded in one piece with the water box and an upper part, forming a cover, attached on the lower part.
  • connection between the expansion tank and the water box is complex to achieve, in particular with regard to the means for degassing liquid.
  • the object of the invention is in particular to avoid the drawbacks mentioned above.
  • a device for a water box and an expansion tank of the type defined in the introduction in which the expansion tank is separated from the water box and attached to it by means of '' a connection tube opening into the upper end of the water box, and in which a partition wall extends inside the connection tube and in the water box to provide two adjacent passages: a passage degassing of liquid connecting the expansion tank to the water box and a passage for the return of liquid from the expansion tank to at least one upper tube of the bundle.
  • a device which is particularly simple to produce is thus obtained since it suffices to attach the expansion tank to the water box via the connection pipe, the partition allowing direct formation of the degassing passage and the passage liquid return.
  • the device allows excellent degassing of the liquid which circulates in the heat exchanger and, moreover, the return of the liquid takes place satisfactorily by means of at least one upper tube of the bundle.
  • the exchanger obtained according to the invention has, as in the case of the aforementioned known device, a small horizontal size.
  • the partition separates, in the upper part of the water box, a small chamber which communicates with the expansion vessel and with the upper tube or tubes of the bundle.
  • the partition comprises a first part which extends in the axis of the tube and which extends inside the water box and a second part which is connected perpendicular to the first part and which is located inside the water box.
  • liquid degassing passage and the liquid return passage can be carried out in a particularly simple manner by virtue of this partition.
  • the partition can be made independently and then introduced into the connection pipe, it is preferred to manufacture it in one piece with the water box.
  • connection tubing can be provided according to different orientations; in particular it can be substantially vertical or even substantially horizontal.
  • connection tube is molded with the water box and comprises means for sealingly connecting with a nozzle provided in the lower part of the expansion tank and coming molding with him.
  • the water box has a central partition which divides it into two separate compartments and vertically superimposed: an upper compartment into which opens the connection pipe with the expansion tank and into which also opens a liquid intake pipe, and a lower compartment into which opens a liquid outlet pipe.
  • the device of the invention can be used very particularly in the case of a U-shaped heat exchanger.
  • the invention relates to a heat exchanger, in particular a radiator with a cooling circuit of an internal combustion engine, which comprises such a device of water box and expansion tank, mounted at one end. of the tube bundle.
  • Such a heat exchanger may include a second water box mounted at the other end of the bundle of tubes.
  • the tubes of the bundle can be U-shaped tubes whose all ends are connected to the water box device, which then eliminates the second water box.
  • FIGS. 1 to 3 represent a heat exchanger, in particular a radiator for a cooling circuit of an internal combustion engine, which comprises a device of water box and expansion tank according to l 'invention.
  • the heat exchanger shown in these figures comprises a bundle 10 formed by a multiplicity of liquid circulation tubes 12 arranged in two rows and passing through a multiplicity of vertical fins 14.
  • the heat exchanger further comprises a device 16 water box and expansion tank according to the invention, mounted at one end of the bundle 10, and a second water box 18 mounted at the other end of the bundle.
  • the device 16 comprises a water box 20 with a generally vertical arrangement as well as an expansion tank 22 which is provided at the upper end of the water box and which extends horizontally beyond it.
  • the expansion tank 22 is separated from the water box and attached to it by means of a connection tube 24.
  • the water box 20 has, in the usual way, an open face 26 with a generally rectangular outline (FIG. 2) for mounting on the periphery of a collector 28.
  • the water box 18 is mounted in the same way on a collector 30 ( Figure 1).
  • the collectors 28 and 30 are plates provided with holes in which the ends of the tubes 12 are mounted as a seal, as is well known in the art.
  • the water box 20 comprises, for molding, a central partition 32 (FIG. 1) which separates its internal space into two vertically superimposed compartments which are leaktightly separated from each other, namely an upper compartment 34 and a compartment lower 36, when the water box 20 is mounted on the bundle 10.
  • the water box 20 further comprises a liquid inlet pipe 38 which opens into the upper part of the upper compartment 34 and a liquid outlet pipe 40 which opens into the lower part of the lower compartment 36.
  • the heat exchanger thus allows the coolant to enter the compartment 34 through the tubing 38, to circulate in the upper half of the tubes 12 to reach the water box 18, then to flow against the current in the lower half. tubes 12 to reach the compartment 36 and leave the exchanger via the pipe 40, the circulation of the liquid being of the U-shaped type.
  • the expansion tank 22 includes a filling orifice or end piece 42 capable of being closed by a plug 44 having, for example, overpressure and vacuum valves.
  • the expansion tank 22 can be formed in one piece by molding and has a horizontal bottom wall 46 providing an orifice 48 in which is fitted, sealed, the tubing connection 24 coming from molding with the water box 20.
  • the tubing 24 thus ensures a connection between the upper compartment 34 of the water box 20 and the expansion tank 22.
  • the device 16 further comprises a partition 50 ( Figures 2 and 3) which extends inside the connection pipe 24 and partly inside the upper compartment 34 of the water box 20.
  • the partition 50 comprises a first part 52 which extends in the axis of the tubing 24 and which extends inside the upper compartment 34 of the water box as well as a second part 54 which is connected perpendicular to the first part 52 and which is located inside the water box 20.
  • the part 52 comprises two parallel longitudinal edges 56, and 58 connected to each other, at one end, by a transverse edge 60 whose length corresponds to the internal diameter of the tubing 24.
  • the longitudinal edge 56 has a length corresponding substantially to that of the connecting tubing 24 and it is connected, by a shoulder 62, to an edge 64 which extends parallel to the edge 58.
  • the edges 58 and 64 are connect between eu x by an edge 66 forming a connection between the parts 52 and 54.
  • the part 54 has a generally rectangular shape limited by two parallel edges 68 and 70 and by an edge
  • the partition 50 can thus be introduced into the connection pipe 24 through the open face 26 of the water box 20.
  • the edges 56 and 58 of the partition 50 are applied against the internal wall. of the pipe 24, the edge 58 further coming to bear against the manifold 28.
  • the walls 62, 64, 68 and 72 come to bear against the inside of the water box and the edge 70 comes s 'apply against a seal usually provided on the manifold 28.
  • the parts 52 and 54 thus delimit, inside the upper compartment 34, a small chamber 74 of generally parallelepipedal shape into which an upper tube 76 of the bundle 10 opens.
  • Part 52 defines, inside the tubing 24, a liquid degassing passage 78 directly connecting the expansion tank 22 to the upper compartment 34 and a liquid return passage 80 connecting the expansion tank 22 to the tube upper 76 through the small chamber 74.
  • the heat exchanger shown in Figures 1 to 3 operates as follows.
  • the coolant circulates through the exchanger from the inlet manifold 38 to the outlet manifold 40 in the manner indicated above, the circulation being of the U-shaped type, as indicated by the arrows in solid line.
  • the air or gas bubbles carried by the liquid are sucked into the expansion tank 22 by virtue of the degassing passage 78. This suction is carried out as soon as the liquid is admitted into the upper compartment 34 due to the fact that the tubing intake 38 opens into the upper end of compartment 34, that is to say close to the place where degassing passage 78 opens.
  • partition 50 can be simply force-fitted inside the tubing, without it being necessary to carry out a bonding or welding operation.
  • connection tube 24 which came from molding with the water box 20, is connected, in leaktight manner, with a nozzle 82 provided at the bottom. of the expansion vessel 22 and came from molding with it.
  • the endpiece 82 has a cylindrical end portion 84 suitable for fitting, in a sealed manner, with a cylindrical end portion 86 of the tubing 24.
  • a seal (not shown) can be interposed between the tubing 24 and the endpiece 82.
  • the expansion tank 22 has a tab 88 provided with through holes 90 for its attachment to a flange 92 provided on a lateral face of the water box 20.
  • the connecting pipe 24 and the endpiece 82 are both substantially vertical, which allows a superimposed mounting of the expansion vessel 22 relative to the heat exchanger.
  • the water box 20 comprises, coming from molding, a connection tube 124 substantially horizontal and the expansion vessel 22 comprises, coming from molding, a nozzle 182 substantially horizontal.
  • the mouthpiece 182 has a cylindrical end part 184 suitable for fitting into a cylindrical internal part 186 of the tube 124, and with the interposition of an annular seal 194.
  • the vessel 22 has a lug 188 for its attachment to a flange 192 provided in part top of the water box 20.
  • a partition 150 having a first part 152 extending in the axis of the tube 124 and a second part 154 connected perpendicular to the first and arranged in a generally vertical direction. This produces a degassing passage 178 connecting the expansion tank to the upper part of the water box and a liquid return passage 180 connecting the expansion tank to an upper tube 76 of the bundle.

Description

L'invention concerne un dispositif de boîte à eau et de vase d'expansion pour un échangeur de chaleur, en particulier pour un radiateur d'un circuit de refroidissement d'un moteur à combustion interne. Elle concerne également un échangeur de chaleur comprenant un tel dispositif.The invention relates to a water box and expansion tank device for a heat exchanger, in particular for a radiator of a cooling circuit of an internal combustion engine. It also relates to a heat exchanger comprising such a device.

On connaît déjà par la Demande de Brevet français FR-A-2 588 366, au nom de la Demanderesse, un dispositif de boîte à eau et de vase d'expansion pour un échangeur de chaleur, du type comprenant une boîte à eau à disposition générale verticale propre à être montée à une extrémité d'un faisceau de tubes horizontaux, ainsi qu'un vase d'expansion prévu à l'extrémité supérieure de la boîte à eau et s'étendant horizontalement au-delà de celle-ci.Already known from French Patent Application FR-A-2,588,366, in the name of the Applicant, a water box and expansion tank device for a heat exchanger, of the type comprising a water box available general vertical suitable for being mounted at one end of a bundle of horizontal tubes, as well as an expansion tank provided at the upper end of the water box and extending horizontally beyond it.

Ce dispositif connu est monobloc, le vase d'expansion étant moulé d'une seule pièce avec la boîte à eau.This known device is in one piece, the expansion tank being molded in one piece with the water box.

Toutefois, ce dispositif est complexe à fabriquer dans la pratique, car il faut réaliser le vase d'expansion en deux parties, à savoir une partie inférieure moulée d'une seule pièce avec la boîte à eau et une partie supérieure, formant couvercle, rapportée sur la partie inférieure.However, this device is complex to manufacture in practice, because it is necessary to make the expansion tank in two parts, namely a lower part molded in one piece with the water box and an upper part, forming a cover, attached on the lower part.

De plus, la liaison entre le vase d'expansion et la boîte à eau est complexe à réaliser, notamment en ce qui concerne les moyens de dégazage de liquide.In addition, the connection between the expansion tank and the water box is complex to achieve, in particular with regard to the means for degassing liquid.

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

Elle propose, à cet effet, un dispositif de boîte à eau et de vase d'expansion du type défini en introduction, dans lequel le vase d'expansion est séparé de la boîte à eau et rapporté sur celle-ci par l'intermédiaire d'une tubulure de raccordement débouchant dans l'extrémité supérieure de la boîte à eau, et dans lequel une cloison de séparation s'étend à l'intérieur de la tubulure de raccordement et dans la boîte à eau pour ménager deux passages adjacents : un passage de dégazage de liquide reliant le vase d'expansion à la boîte à eau et un passage pour le retour de liquide du vase d'expansion à au moins un tube supérieur du faisceau.To this end, it proposes a device for a water box and an expansion tank of the type defined in the introduction, in which the expansion tank is separated from the water box and attached to it by means of '' a connection tube opening into the upper end of the water box, and in which a partition wall extends inside the connection tube and in the water box to provide two adjacent passages: a passage degassing of liquid connecting the expansion tank to the water box and a passage for the return of liquid from the expansion tank to at least one upper tube of the bundle.

On obtient ainsi un dispositif particulièrement simple à réaliser puisqu'il suffit de rapporter le vase d'expansion sur la boîte à eau par l'intermédiaire de la tubulure de raccordement, la cloison de séparation permettant de former directement le passage de dégazage et le passage de retour de liquide.A device which is particularly simple to produce is thus obtained since it suffices to attach the expansion tank to the water box via the connection pipe, the partition allowing direct formation of the degassing passage and the passage liquid return.

Le dispositif permet un excellent dégazage du liquide qui circule dans l'échangeur de chaleur et, de plus, le retour du liquide s'effectue de façon satisfaisante par l'intermédiaire d'au moins un tube supérieur du faisceau.The device allows excellent degassing of the liquid which circulates in the heat exchanger and, moreover, the return of the liquid takes place satisfactorily by means of at least one upper tube of the bundle.

Par ailleurs, l'échangeur obtenu selon l'invention présente, comme dans le cas du dispositif connu précité, un faible encombrement horizontal.Furthermore, the exchanger obtained according to the invention has, as in the case of the aforementioned known device, a small horizontal size.

Avantageusement, la cloison de séparation ménage, dans la partie supérieure de la boîte à eau, une petite chambre qui communique avec le vase d'expansion et avec le ou les tubes supérieurs du faisceau.Advantageously, the partition separates, in the upper part of the water box, a small chamber which communicates with the expansion vessel and with the upper tube or tubes of the bundle.

Dans une forme de réalisation préférée de l'invention, la cloison de séparation comprend une première partie qui s'étend dans l'axe de la tubulure et qui se prolonge à l'intérieur de la boîte à eau et une seconde partie qui est raccordée perpendiculairement à la première partie et qui se situe à l'intérieur de la boîte à eau.In a preferred embodiment of the invention, the partition comprises a first part which extends in the axis of the tube and which extends inside the water box and a second part which is connected perpendicular to the first part and which is located inside the water box.

Ainsi, le passage de dégazage de liquide et le passage de retour de liquide peuvent être réalisés de manière particulièrement simple grâce à cette cloison.Thus, the liquid degassing passage and the liquid return passage can be carried out in a particularly simple manner by virtue of this partition.

Bien que la cloison de séparation puisse être réalisée de manière indépendante et introduite ensuite dans la tubulure de raccordement, on préfère la fabriquer d'une seule pièce avec la boîte à eau.Although the partition can be made independently and then introduced into the connection pipe, it is preferred to manufacture it in one piece with the water box.

La tubulure de raccordement peut être prévue suivant différentes orientations ; notamment elle peut être sensiblement verticale ou encore sensiblement horizontale.The connection tubing can be provided according to different orientations; in particular it can be substantially vertical or even substantially horizontal.

Dans une forme de réalisation préférée de l'invention, la tubulure de raccordement est venue de moulage avec la boîte à eau et comprend des moyens pour se raccorder, de manière étanche, avec un embout prévu en partie inférieure du vase d'expansion et venu de moulage avec lui.In a preferred embodiment of the invention, the connection tube is molded with the water box and comprises means for sealingly connecting with a nozzle provided in the lower part of the expansion tank and coming molding with him.

Avantageusement, la boîte à eau comporte une cloison médiane qui la divise en deux compartiments séparés et superposés verticalement : un compartiment supérieur dans lequel débouche la tubulure de raccordement avec le vase d'expansion et dans lequel débouche également une tubulure d'admission de liquide, et un compartiment inférieur dans lequel débouche une tubulure de sortie de liquide. Ainsi, le dispositif de l'invention peut être utilisé tout particulièrement dans le cas d'un échangeur de chaleur à circulation en U.Advantageously, the water box has a central partition which divides it into two separate compartments and vertically superimposed: an upper compartment into which opens the connection pipe with the expansion tank and into which also opens a liquid intake pipe, and a lower compartment into which opens a liquid outlet pipe. Thus, the device of the invention can be used very particularly in the case of a U-shaped heat exchanger.

Sous un autre aspect, l'invention concerne un échangeur de chaleur, en particulier un radiateur à circuit de refroidissement d'un moteur à combustion interne, qui comprend un tel dispositif de boîte à eau et de vase d'expansion, monté à une extrémité du faisceau de tubes.In another aspect, the invention relates to a heat exchanger, in particular a radiator with a cooling circuit of an internal combustion engine, which comprises such a device of water box and expansion tank, mounted at one end. of the tube bundle.

Un tel échangeur de chaleur peut comporter une seconde boîte à eau montée à l'autre extrémité du faisceau de tubes.Such a heat exchanger may include a second water box mounted at the other end of the bundle of tubes.

En variante, les tubes du faisceau peuvent être des tubes en U dont toutes les extrémités se raccordent au dispositif de boîte à eau, ce qui supprime alors la seconde boîte à eau.As a variant, the tubes of the bundle can be U-shaped tubes whose all ends are connected to the water box device, which then eliminates the second water box.

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

  • la figure 1 est une vue schématique en élévation d'un échangeur de chaleur comprenant un dispositif de boîte à eau et de vase d'expansion selon l'invention ;
  • la figure 2 est une vue partielle en perspective et avec arrachement de l'échangeur de chaleur de la figure 1 ;
  • la figure 3 est une vue en coupe partielle suivant la ligne III-III de la figure 1 ;
  • la figure 4 est une vue partielle en perspective d'un échangeur de chaleur, dans une autre forme de réalisation, montrant l'assemblage du vase d'expansion et de la boîte à eau ;
  • la figure 5 est une vue partielle en perspective d'un échangeur de chaleur, dans une autre forme de réalisation, montrant l'assemblage du vase d'expansion et de la boîte à eau ; et
  • la figure 6 est une vue en coupe suivant la ligne VI-VI de la figure 5.
In the description which follows, given solely by way of example, reference is made to the appended drawings, in which:
  • Figure 1 is a schematic elevational view of a heat exchanger comprising a water box and expansion tank device according to the invention;
  • Figure 2 is a partial perspective view with cutaway of the heat exchanger of Figure 1;
  • Figure 3 is a partial sectional view along line III-III of Figure 1;
  • Figure 4 is a partial perspective view of a heat exchanger, in another embodiment, showing the assembly of the expansion tank and the water box;
  • Figure 5 is a partial perspective view of a heat exchanger, in another embodiment, showing the assembly of the expansion tank and the water box; and
  • FIG. 6 is a sectional view along line VI-VI of FIG. 5.

On se réfère d'abord aux figures 1 à 3 qui représentent un échangeur de chaleur, notamment un radiateur pour un circuit de refroidissement d'un moteur à combustion interne, qui comprend un dispositif de boîte à eau et de vase d'expansion selon l'invention.First, reference is made to FIGS. 1 to 3 which represent a heat exchanger, in particular a radiator for a cooling circuit of an internal combustion engine, which comprises a device of water box and expansion tank according to l 'invention.

L'échangeur de chaleur représenté sur ces figures comprend un faisceau 10 formé d'une multiplicité de tubes 12 de circulation de liquide agencés en deux rangées et traversant une multiplicité d'ailettes verticales 14. L'échangeur de chaleur comprend en outre un dispositif 16 de boîte à eau et de vase d'expansion selon l'invention, monté à une extrémité du faisceau 10, et une seconde boîte à eau 18 montée à l'autre extrémité du faisceau.The heat exchanger shown in these figures comprises a bundle 10 formed by a multiplicity of liquid circulation tubes 12 arranged in two rows and passing through a multiplicity of vertical fins 14. The heat exchanger further comprises a device 16 water box and expansion tank according to the invention, mounted at one end of the bundle 10, and a second water box 18 mounted at the other end of the bundle.

Le dispositif 16 comprend une boîte à eau 20 à disposition générale verticale ainsi qu'un vase d'expansion 22 qui est prévu à l'extrémité supérieure de la boîte à eau et qui s'étend horizontalement au-delà de celle-ci. Le vase d'expansion 22 est séparé de la boîte à eau et rapporté sur celle-ci par l'intermédiaire d'une tubulure de raccordement 24.The device 16 comprises a water box 20 with a generally vertical arrangement as well as an expansion tank 22 which is provided at the upper end of the water box and which extends horizontally beyond it. The expansion tank 22 is separated from the water box and attached to it by means of a connection tube 24.

La boîte à eau 20 présente, de la manière habituelle, une face ouverte 26 à contour général rectangulaire (figure 2) pour son montage sur la périphérie d'un collecteur 28. La boîte à eau 18 est montée de la même manière sur un collecteur 30 (figure 1). Les collecteurs 28 et 30 sont des plaques munies de trous dans lesquels les extrémités des tubes 12 sont montées à étanchéité, comme cela est bien connu dans la technique.The water box 20 has, in the usual way, an open face 26 with a generally rectangular outline (FIG. 2) for mounting on the periphery of a collector 28. The water box 18 is mounted in the same way on a collector 30 (Figure 1). The collectors 28 and 30 are plates provided with holes in which the ends of the tubes 12 are mounted as a seal, as is well known in the art.

La boîte à eau 20 comprend, de moulage, une cloison médiane 32 (figure 1) qui sépare son espace interne en deux compartiments superposés verticalement et séparés de façon étanche l'un de l'autre, à savoir un compartiment supérieur 34 et un compartiment inférieur 36, lorsque la boîte à eau 20 est montée sur le faisceau 10. La boîte à eau 20 comprend en outre une tubulure 38 d'admission de liquide qui débouche dans la partie supérieure du compartiment supérieur 34 et une tubulure 40 de sortie de liquide qui débouche dans la partie inférieure du compartiment inférieur 36.The water box 20 comprises, for molding, a central partition 32 (FIG. 1) which separates its internal space into two vertically superimposed compartments which are leaktightly separated from each other, namely an upper compartment 34 and a compartment lower 36, when the water box 20 is mounted on the bundle 10. The water box 20 further comprises a liquid inlet pipe 38 which opens into the upper part of the upper compartment 34 and a liquid outlet pipe 40 which opens into the lower part of the lower compartment 36.

L'échangeur de chaleur permet ainsi au liquide de refroidissement de pénétrer dans le compartiment 34 par la tubulure 38, de circuler dans la moitié supérieure des tubes 12 pour gagner la boîte à eau 18, de circuler ensuite à contre-courant dans la moitié inférieure des tubes 12 pour gagner le compartiment 36 et quitter l'échangeur par la tubulure 40, la circulation du liquide étant du type en U.The heat exchanger thus allows the coolant to enter the compartment 34 through the tubing 38, to circulate in the upper half of the tubes 12 to reach the water box 18, then to flow against the current in the lower half. tubes 12 to reach the compartment 36 and leave the exchanger via the pipe 40, the circulation of the liquid being of the U-shaped type.

Le vase d'expansion 22 comprend un orifice ou embout 42 de remplissage propre à être fermé par un bouchon 44 possédant, par exemple, des clapets de surpression et de dépression.The expansion tank 22 includes a filling orifice or end piece 42 capable of being closed by a plug 44 having, for example, overpressure and vacuum valves.

Dans la forme de réalisation représentée aux figures 1 à 3, le vase d'expansion 22 peut être formé d'une seule pièce par moulage et comporte une paroi de fond horizontale 46 ménageant un orifice 48 dans lequel est emboîtée, à étanchéité, la tubulure de raccordement 24 venue de moulage avec la boîte à eau 20. La tubulure 24 assure ainsi une liaison entre le compartiment supérieur 34 de la boîte à eau 20 et le vase d'expansion 22.In the embodiment shown in Figures 1 to 3, the expansion tank 22 can be formed in one piece by molding and has a horizontal bottom wall 46 providing an orifice 48 in which is fitted, sealed, the tubing connection 24 coming from molding with the water box 20. The tubing 24 thus ensures a connection between the upper compartment 34 of the water box 20 and the expansion tank 22.

Le dispositif 16 comprend en outre une cloison de séparation 50 (figures 2 et 3) qui s'étend à l'intérieur de la tubulure de raccordement 24 et en partie à l'intérieur du compartiment supérieur 34 de la boîte à eau 20. La cloison 50 comprend une première partie 52 qui s'étend dans l'axe de la tubulure 24 et qui se prolonge à l'intérieur du compartiment supérieur 34 de la boîte à eau ainsi qu'une seconde partie 54 qui se raccorde perpendiculairement à la première partie 52 et qui se situe à l'intérieur de la boîte à eau 20. La partie 52 comprend deux bords longitudinaux parallèles 56, et 58 reliés entre eux, à une extrémité, par un bord transversal 60 dont la longueur correspond au diamètre interne de la tubulure 24. Le bord longitudinal 56 a une longueur correspondant sensiblement à celle de la tubulure de raccordement 24 et il se raccorde, par un épaulement 62, à un bord 64 qui s'étend parallèlement au bord 58. Les bords 58 et 64 se raccordent entre eux par une arête 66 formant raccordement entre les parties 52 et 54. Par ailleurs, la partie 54 présente une forme générale rectangulaire limitée par deux bords parallèles 68 et 70 et par un bord 72 parallèle à l'arête 66.The device 16 further comprises a partition 50 (Figures 2 and 3) which extends inside the connection pipe 24 and partly inside the upper compartment 34 of the water box 20. The partition 50 comprises a first part 52 which extends in the axis of the tubing 24 and which extends inside the upper compartment 34 of the water box as well as a second part 54 which is connected perpendicular to the first part 52 and which is located inside the water box 20. The part 52 comprises two parallel longitudinal edges 56, and 58 connected to each other, at one end, by a transverse edge 60 whose length corresponds to the internal diameter of the tubing 24. The longitudinal edge 56 has a length corresponding substantially to that of the connecting tubing 24 and it is connected, by a shoulder 62, to an edge 64 which extends parallel to the edge 58. The edges 58 and 64 are connect between eu x by an edge 66 forming a connection between the parts 52 and 54. Furthermore, the part 54 has a generally rectangular shape limited by two parallel edges 68 and 70 and by an edge 72 parallel to the edge 66.

La cloison 50 peut être introduite ainsi dans la tubulure de raccordement 24 par la face ouverte 26 de la boîte à eau 20. Dans la position ainsi obtenue, les bords 56 et 58 de la cloison 50 s'appliquent contre la paroi interne de la tubulure 24, le bord 58 venant en outre s'appliquer contre le collecteur 28. Par ailleurs, les parois 62, 64, 68 et 72 viennent s'appliquer contre l'intérieur de la boîte à eau et le bord 70 vient s'appliquer contre un joint d'étanchéité prévu habituellement sur le collecteur 28.The partition 50 can thus be introduced into the connection pipe 24 through the open face 26 of the water box 20. In the position thus obtained, the edges 56 and 58 of the partition 50 are applied against the internal wall. of the pipe 24, the edge 58 further coming to bear against the manifold 28. Furthermore, the walls 62, 64, 68 and 72 come to bear against the inside of the water box and the edge 70 comes s 'apply against a seal usually provided on the manifold 28.

En pratique, il est prévu que la cloison 50 soit élaborée de manière monobloc avec la boîte à eau 20.In practice, provision is made for the partition 50 to be produced in a single piece with the water box 20.

Les parties 52 et 54 délimitent ainsi, à l'intérieur du compartiment supérieur 34, une petite chambre 74 de forme générale parallélépipédique dans laquelle débouche un tube supérieur 76 du faisceau 10.The parts 52 and 54 thus delimit, inside the upper compartment 34, a small chamber 74 of generally parallelepipedal shape into which an upper tube 76 of the bundle 10 opens.

La partie 52 délimite, à l'intérieur de la tubulure 24, un passage 78 de dégazage de liquide reliant directement le vase d'expansion 22 au compartiment supérieur 34 et un passage de retour de liquide 80 reliant le vase d'expansion 22 au tube supérieur 76 par l'intermédiaire de la petite chambre 74.Part 52 defines, inside the tubing 24, a liquid degassing passage 78 directly connecting the expansion tank 22 to the upper compartment 34 and a liquid return passage 80 connecting the expansion tank 22 to the tube upper 76 through the small chamber 74.

L'échangeur de chaleur représenté aux figures 1 à 3 fonctionne de la manière suivante. Le liquide de refroidissement circule au travers de l'échangeur depuis la tubulure d'admission 38 jusqu'à la tubulure de sortie 40 de la manière indiquée précédemment, la circulation étant du type en U, comme indiqué par les flèches en trait continu. Les bulles d'air ou de gaz véhiculées par le liquide sont aspirées dans le vase d'expansion 22 grâce au passage de dégazage 78. Cette aspiration est effectuée dès l'admission du liquide dans le compartiment supérieur 34 du fait que la tubulure d'admission 38 débouche dans l'extrémité supérieure du compartiment 34, c'est-à-dire à proximité de l'endroit où débouche le passage de dégazage 78.The heat exchanger shown in Figures 1 to 3 operates as follows. The coolant circulates through the exchanger from the inlet manifold 38 to the outlet manifold 40 in the manner indicated above, the circulation being of the U-shaped type, as indicated by the arrows in solid line. The air or gas bubbles carried by the liquid are sucked into the expansion tank 22 by virtue of the degassing passage 78. This suction is carried out as soon as the liquid is admitted into the upper compartment 34 due to the fact that the tubing intake 38 opens into the upper end of compartment 34, that is to say close to the place where degassing passage 78 opens.

Le retour du liquide à partir du vase d'expansion 22 s'effectue par le passage 80, la petite chambre 74 et le tube supérieur 76 comme indiqué par les flèches en trait interrompu.The return of the liquid from the expansion tank 22 takes place through the passage 80, the small chamber 74 and the upper tube 76 as indicated by the arrows in broken lines.

Il est à noter que la cloison de séparation 50 peut être simplement emmanchée en force à l'intérieur de la tubulure, sans qu'il soit nécessaire d'effectuer une opération de collage ou de soudage.It should be noted that the partition 50 can be simply force-fitted inside the tubing, without it being necessary to carry out a bonding or welding operation.

Dans la forme de réalisation de la figure 4, à laquelle on se réfère maintenant, la tubulure de raccordement 24, qui est venue de moulage avec la boîte à eau 20, est raccordée, de façon étanche, avec un embout 82 prévu en partie inférieure du vase d'expansion 22 et venu de moulage avec lui. A cet effet, l'embout 82 possède une partie terminale cylindrique 84 propre à s'emboîter, de manière étanche, avec une partie terminale cylindrique 86 de la tubulure 24. Un joint d'étanchéité (non représenté) peut être interposé entre la tubulure 24 et l'embout 82. Comme montré à la figure 6, le vase d'expansion 22 possède une patte 88 munie de trous traversants 90 pour sa fixation sur une bride 92 prévue sur une face latérale de la boîte à eau 20.In the embodiment of FIG. 4, to which reference is now made, the connection tube 24, which came from molding with the water box 20, is connected, in leaktight manner, with a nozzle 82 provided at the bottom. of the expansion vessel 22 and came from molding with it. To this end, the endpiece 82 has a cylindrical end portion 84 suitable for fitting, in a sealed manner, with a cylindrical end portion 86 of the tubing 24. A seal (not shown) can be interposed between the tubing 24 and the endpiece 82. As shown in FIG. 6, the expansion tank 22 has a tab 88 provided with through holes 90 for its attachment to a flange 92 provided on a lateral face of the water box 20.

Dans la forme de réalisation de la figure 4, la tubulure de raccordement 24 de même que l'embout 82 sont tous deux sensiblement verticaux, ce qui permet un montage superposé du vase d'expansion 22 par rapport à l'échangeur de chaleur.In the embodiment of Figure 4, the connecting pipe 24 and the endpiece 82 are both substantially vertical, which allows a superimposed mounting of the expansion vessel 22 relative to the heat exchanger.

Dans la forme de réalisation des figures 5 et 6, auxquelles on se réfère maintenant, la boîte à eau 20 comporte, venue de moulage, une tubulure de raccordement 124 sensiblement horizontale et le vase d'expansion 22 comprend, venu de moulage, un embout 182 sensiblement horizontal. L'embout 182 comporte une partie terminale cylindrique 184 propre à s'emboîter dans une partie interne cylindrique 186 de la tubulure 124, et avec interposition d'un joint annulaire 194. Le vase 22 possède une patte 188 pour sa fixation sur une bride 192 prévue en partie supérieure de la boîte à eau 20.In the embodiment of FIGS. 5 and 6, to which reference is now made, the water box 20 comprises, coming from molding, a connection tube 124 substantially horizontal and the expansion vessel 22 comprises, coming from molding, a nozzle 182 substantially horizontal. The mouthpiece 182 has a cylindrical end part 184 suitable for fitting into a cylindrical internal part 186 of the tube 124, and with the interposition of an annular seal 194. The vessel 22 has a lug 188 for its attachment to a flange 192 provided in part top of the water box 20.

A l'intérieur de la tubulure 124 est prévue une cloison de séparation 150 possédant une première partie 152 s'étendant dans l'axe de la tubulure 124 et une seconde partie 154 raccordée perpendiculairement à la première et disposée dans une direction généralement verticale. On réalise ainsi un passage de dégazage 178 reliant le vase d'expansion à la partie supérieure de la boîte à eau et un passage 180 de retour de liquide reliant le vase d'expansion à un tube supérieur 76 du faisceau.Inside the tube 124 is provided a partition 150 having a first part 152 extending in the axis of the tube 124 and a second part 154 connected perpendicular to the first and arranged in a generally vertical direction. This produces a degassing passage 178 connecting the expansion tank to the upper part of the water box and a liquid return passage 180 connecting the expansion tank to an upper tube 76 of the bundle.

Bien entendu il est possible, sans sortir du cadre de l'invention, de prévoir d'autres orientations de la tubulure de raccordement.Of course it is possible, without departing from the scope of the invention, to provide other orientations of the connecting pipe.

Claims (10)

  1. A water header and expansion vessel in combination, for a heat exchanger such as a radiator in a cooling circuit of an internal combustion engine, being of the type comprising a water header (20) disposed generally vertically and adapted to be mounted at one end of a bundle (10) of horizontal tubes (12), together with an expansion vessel (22) which is arranged at the upper end of the water header and which extends horizontally beyond the latter, characterised in that the expansion vessel (22) is a separate component from the water header (20) and is carried on the latter through a connecting pipe (24; 124) opening into the upper end of the water header (20), and in that a separating bulkhead (50; 150) extends inside the connecting pipe (24; 124) and into the water header (20) so as to define two adjacent passages: a liquid degassing passage (78; 178) connecting the expansion vessel to the water header, and a passage (80; 180) for the return of liquid from the expansion vessel to at least one upper tube (76) of the bundle (10).
  2. A combination according to Claim 1, characterised in that the separating bulkhead (50; 150) defines, in the upper part of the water header (20), a small chamber (74; 174) which communicates with the expansion vessel (22).
  3. A combination according to Claim 1 or Claim 2, characterised in that the separating bulkhead (50; 150) comprises a first portion (52; 152) which extends on the axis of the connecting pipe (24; 124), and which is extended within the water header (20), together with a second portion (54; 154) which is joined to the first portion at right angles therewith, and which is situated within the water header.
  4. A combination according to one of Claims 1 to 3, in which the water header (20) has an open face (26) for mounting it on the end of the bundle (10) of tubes (12) through a header plate (28), characterised in that the separating bulkhead (50; 150) is introduced into the connecting pipe (24; 124) through the open face (26) of the water header.
  5. A combination according to one of Claims 1 to 3, in which the water header (20) has an open face (26) for mounting it on the end of the bundle (10) through a header plate (28), characterised in that the bulkhead (50, 150) is integral with the water header (20).
  6. A combination according to one of Claims 1 to 5, characterised in that the connecting pipe (24) is substantially vertical.
  7. A combination according to one of Claims 1 to 5, characterised in that the connecting pipe (124) is substantially horizontal.
  8. A combination according to one of Claims 1 to 7, characterised in that the connecting pipe (24; 124) is made by moulding it integrally with the water header (20), and includes means for joining it sealingly to a tubular projection (82; 182) which is provided in the lower part of the expansion vessel (22), with which it is formed integrally by moulding.
  9. A combination according to one of Claims 1 to 8, characterised in that the water header (20) includes a central bulkhead (32) which divides it into two compartments separated from each other and in vertically superimposed relationship: an upper compartment (34) into which the connecting pipe (24) is open, and into which a liquid feed pipe branch (38) is also open, together with a lower compartment (36) into which a liquid outlet pipe branch (40) is open.
  10. A heat exchanger, in particular a radiator for a cooling circuit for an internal combustion engine, characterised in that it includes a combination of water header and expansion vessel in accordance with one of Claims 1 to 8, mounted at one end of the bundle (10) of tubes (12).
EP19910401061 1990-04-26 1991-04-23 Header box with expansion chamber for a heat exchanger, for example a cooler, and heat-exchanger having such a device Expired - Lifetime EP0454559B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9005331A FR2661489B1 (en) 1990-04-26 1990-04-26 WATER BOX AND EXPANSION VESSEL DEVICE FOR A HEAT EXCHANGER, SUCH AS A COOLING RADIATOR, AND HEAT EXCHANGER COMPRISING SUCH A DEVICE.
FR9005331 1990-04-26

Publications (2)

Publication Number Publication Date
EP0454559A1 EP0454559A1 (en) 1991-10-30
EP0454559B1 true EP0454559B1 (en) 1993-12-01

Family

ID=9396118

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Application Number Title Priority Date Filing Date
EP19910401061 Expired - Lifetime EP0454559B1 (en) 1990-04-26 1991-04-23 Header box with expansion chamber for a heat exchanger, for example a cooler, and heat-exchanger having such a device

Country Status (5)

Country Link
EP (1) EP0454559B1 (en)
BR (1) BR9101631A (en)
DE (1) DE69100704T2 (en)
ES (1) ES2049095T3 (en)
FR (1) FR2661489B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225253C2 (en) * 1992-08-03 1996-12-05 Behr Gmbh & Co Arrangement of a plastic water tank and an expansion tank made of plastic
DE4320343C2 (en) * 1993-06-19 2002-11-21 Behr Gmbh & Co Heat exchangers, in particular cross-flow coolers for internal combustion engines
DE4425440A1 (en) * 1994-07-19 1996-01-25 Valeo Motorkuehlsysteme Gmbh Cross-flow cooler with ventilation
DE19953786B4 (en) * 1999-11-09 2009-12-17 Behr Gmbh & Co. Kg Coolant cooler with a surge tank
GB0318402D0 (en) * 2003-08-06 2003-09-10 Ford Global Tech Llc Cooling system expansion tank
US10260823B2 (en) 2012-11-19 2019-04-16 Robert Cooney Freeze protection system with drainage control for heat transfer coils in HVAC systems
US9448018B2 (en) 2012-11-19 2016-09-20 Robert Cooney Expansion relief header for protecting heat transfer coils in HVAC systems
CN105014360B (en) * 2015-05-05 2017-08-01 上海九段精密机电科技有限公司 Auto radiator water room assembly equipment and application method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3406751A (en) * 1967-06-30 1968-10-22 Young Radiator Co Crossflow radiator
US4006775A (en) * 1974-03-07 1977-02-08 Avrea Walter C Automatic positive anti-aeration system for engine cooling system
FR2588366A1 (en) * 1985-10-09 1987-04-10 Valeo WATER BOX AND EXPANSION VESSEL DEVICE, AND HEAT EXCHANGER COMPRISING THE SAME
FR2609329B1 (en) * 1987-01-06 1989-03-31 Valeo DEFLECTOR AND ITS USE FOR PROTECTING A LEVEL INDICATOR FLOAT IN A HEAT EXCHANGER

Also Published As

Publication number Publication date
EP0454559A1 (en) 1991-10-30
DE69100704D1 (en) 1994-01-13
BR9101631A (en) 1991-12-10
ES2049095T3 (en) 1994-04-01
FR2661489B1 (en) 1992-07-10
DE69100704T2 (en) 1994-03-31
FR2661489A1 (en) 1991-10-31

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