EP0219417A1 - Water box and expansion chamber for a heat exchanger - Google Patents

Water box and expansion chamber for a heat exchanger Download PDF

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Publication number
EP0219417A1
EP0219417A1 EP86402176A EP86402176A EP0219417A1 EP 0219417 A1 EP0219417 A1 EP 0219417A1 EP 86402176 A EP86402176 A EP 86402176A EP 86402176 A EP86402176 A EP 86402176A EP 0219417 A1 EP0219417 A1 EP 0219417A1
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EP
European Patent Office
Prior art keywords
water box
orifice
expansion tank
liquid
expansion
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Granted
Application number
EP86402176A
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German (de)
French (fr)
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EP0219417B1 (en
Inventor
Roberto Polidori
Marco Broglio
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Valeo SE
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Valeo SE
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Publication of EP0219417B1 publication Critical patent/EP0219417B1/en
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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/917—Pressurization and/or degassification

Definitions

  • the invention relates to a water box and expansion tank device for a heat exchanger, such as a radiator of a cooling circuit of an internal combustion engine, in which the water box and the expansion tank are a one-piece assembly molded in one piece.
  • the air or gas bubbles which are transported by the engine coolant tend to collect in the upper part of the water box.
  • a tube is then provided which is fixed, for example, to the water box and which puts the upper end of the latter in communication with the expansion tank, opening into the latter below the level of the liquid. contained therein in normal operation, to prevent an air intake in the cooling circuit when the engine is stopped.
  • the arrangement and fixing of this tube are inconvenient to produce and lead to an increase in the cost of the exchanger.
  • the object of the invention is to avoid these drawbacks while ensuring correct degassing of the coolant.
  • a water box and expansion tank device for a heat exchanger, such as a radiator of a cooling circuit of an internal combustion engine, in which the water box and the tank expansion form a one-piece assembly molded in one piece, the water box being generally vertical and comprising an internal partition separating it into two compartments into which an upper liquid inlet nozzle and a lower outlet nozzle respectively open liquids formed with the water box, characterized in that the liquid inlet nozzle is substantially adjacent to the internal partition of the water box and to the expansion tank and in that a liquid degassing passage comprises an orifice formed through a partition wall between the water box and the expansion tank, this orifice opening directly on the one hand into the liquid inlet nozzle and on the other hand into the expansion below level of the liquid normally contained therein.
  • the water box of the device according to the invention is therefore formed directly with a liquid inlet nozzle which opens, not in its upper part, but in its middle part immediately above the internal partition, which allows d 'Associate with this liquid inlet nozzle a degassing passage formed by a simple orifice in the wall separating the water box or the liquid inlet nozzle of the expansion tank.
  • This orifice opens directly into the expansion tank below the level of the liquid which is normally contained therein, which prevents any recovery of air or gas in the cooling circuit.
  • the expansion vessel comprises, at this orifice, an internal tubular rim which is oriented towards the upper end of the expansion vessel for guiding the air or gas bubbles exiting through this orifice.
  • an additional orifice is formed through the wall separating the expansion tank and the water box, this orifice opening into the water box immediately below the internal partition of the latter, to also form a degassing passage. liquid.
  • the degassing provided by the first orifice is not complete.
  • air and gas bubbles will be transported by the liquid circulating in the exchanger and will gather in the lower compartment of the water box, below the internal partition of the latter.
  • the additional opening allows these air or gas bubbles to reach the expansion tank.
  • FIG. 1 represents a known heat exchanger, intended to form a radiator of a cooling circuit of an internal combustion engine of a motor vehicle.
  • this exchanger 10 comprises a bundle 12 of horizontal liquid circulation tubes, at the ends of which are mounted two water boxes 14 and 16.
  • the water box 16 comprises, in its upper part, an inlet nozzle 18 liquid in the exchanger and, at its lower part, a liquid outlet nozzle 20.
  • a central partition 22 divides the internal space of the water box into two watertight separate compartments when the water box 16 is mounted on the end of the bundle of tubes 12.
  • the water box 16 is formed by molding with a generally vertical expansion tank 24, like the water boxes 14 and 16, and which is for example adjacent to the water box 16.
  • the tank expansion 24 includes a filling orifice or nozzle, closed by a plug 26 provided with calibrated overpressure and vacuum valves.
  • the expansion vessel 24 communicates with the lower end of the water box 16 or with the outlet nozzle 20 through an orifice or conduit 28 for the return of liquid in the cooling circuit.
  • a small tube 30 is fixed in the water box 16 to connect the upper part thereof to the expansion tank 24.
  • the lower end of the tube 30 extends below the level 32 of the liquid which is normally contained in the expansion vessel 24 and enters this expansion vessel through an orifice in the wall 34 of separation between the expansion vessel and the water box.
  • the invention proposes, as shown in FIG. 2, to form this water box with a liquid inlet nozzle which opens out, not in the upper part of the water box, but substantially in its middle part.
  • the water box 36 which is integral with the expansion tank 38 also includes a central partition 40 which forms an upper compartment 42 and a lower compartment 43 therein.
  • the nozzle 44 for entering the liquid in the radiator opens into the upper compartment 42 of the water box 36, at the middle partition 40, and the nozzle 46 for the liquid outlet is formed in the lower part of the water box, in a conventional manner.
  • a liquid degassing passage comprises an orifice 48 formed in a wall 50 of separation between the expansion vessel 38 and the inlet nozzle 44 or the upper compartment 42 of the water box, this orifice 48 directly connecting the vessel 38 at the inlet end 44 and necessarily opening below the level 52 of the liquid normally contained in the expansion tank.
  • the latter can be formed with an internal tubular rim 54, immediately below the orifice 48, this rim 54 being oriented towards the upper end of the expansion vessel to form an upward guide of the air and gas bubbles leaving through the orifice 48.
  • the lower end of the expansion vessel communicates with the lower end of the water box 36 or with the outlet nozzle 46.
  • an orifice 56 can be formed in the wall separating the expansion tank 38 from the lower compartment 43 of the water box, immediately below the central partition 40.
  • the coolant is brought into the water box 36 through the nozzle 44. Air or gas bubbles carried by this liquid are drawn into the expansion tank 38 through the orifice 48.
  • the liquid circulates in the bundle of tubes 12 and in the other water box 14, as indicated by the arrows, and returns to the lower compartment 43 of the water box 36, from where it exits via the end piece 46. If this liquid still contains air or gas bubbles, these tend to collect at the top of the lower compartment 43, under the partition 40, and are then sucked into the expansion tank 38 through the orifice 56.
  • the water box 36 and the expansion tank 38 molded in one piece are not adjacent, but slightly spaced from each other and do not have a common wall in which the orifices could be formed. 48 and 56.
  • these orifices are replaced by small horizontal conduits which are formed by molding with the water box and the expansion vessel at the level of orifices 48 and 56 and which can be demolded conveniently by the open face of the water box This is a simple equivalent to the scope of the skilled person.

Abstract

Dispositif monobloc de boîte à eau (36) et de vase d'expansion (38), dans lequel la boîte à eau (36) comprend une cloison médiane (40) la partageant en deux compartiments dans lesquels débouchent un embout (44) d'entrée de liquide et un embout (46) de sortie de liquide, l'embout d'entrée (44) étant adjacent à la cloison médiane (40) et relié au vase d'expansion par un orifice (48) d'une paroi (50) de séparation entre le vase d'expansion et la boîte à eau, cet orifice formant un passage de dégazage de liquide. L'invention s'applique notamment aux radiateurs des véhicules automobiles.Monobloc device for a water box (36) and an expansion tank (38), in which the water box (36) comprises a central partition (40) dividing it into two compartments into which a mouthpiece (44) opens. liquid inlet and a liquid outlet nozzle (46), the inlet nozzle (44) being adjacent to the central partition (40) and connected to the expansion vessel by an orifice (48) in a wall ( 50) for separation between the expansion tank and the water box, this orifice forming a liquid degassing passage. The invention applies in particular to radiators of motor vehicles.

Description

L'invention concerne un dispositif de boîte à eau et de vase d'expansion pour échangeur de chaleur, tel qu'un radiateur d'un circuit de refroidissement de moteur à combustion interne, dans lequel la boîte à eau et le vase d'expansion sont un ensemble monobloc moulé en une seule pièce.The invention relates to a water box and expansion tank device for a heat exchanger, such as a radiator of a cooling circuit of an internal combustion engine, in which the water box and the expansion tank are a one-piece assembly molded in one piece.

Il est déjà connu, dans un tel dispositif monobloc, de prévoir un passage de dégazage du liquide circulant dans l'échangeur de chaleur, pour éviter que des bulles d'air ou de gaz véhiculées par le liquide puissent se rassembler en certains points de la culasse du moteur et y former des points chauds.It is already known, in such a one-piece device, to provide a degassing passage for the liquid circulating in the heat exchanger, to prevent bubbles of air or gas carried by the liquid from being able to collect at certain points of the engine cylinder head and form hot spots.

Lorsque la boîte à eau est à disposition générale verti­cale, les bulles d'air ou de gaz qui sont véhiculées par le liquide de refroidissement du moteur ont tendance à se rassembler en partie supérieure de la boîte à eau. Pour le dégazage, on prévoit alors un tube qui est fixé par exemple sur la boîte à eau et qui met en communication l'extrémité supérieure de celle-ci avec le vase d'expan­sion, en débouchant dans ce dernier en dessous du niveau du liquide qui y est contenu en fonctionnement normal, pour éviter une reprise d'air dans le circuit de refroidis­sement à l'arrêt du moteur. La disposition et la fixation de ce tube sont peu commodes à réaliser et entraînent une augmentation du coût de l'échangeur.When the water box is generally vertically arranged, the air or gas bubbles which are transported by the engine coolant tend to collect in the upper part of the water box. For degassing, a tube is then provided which is fixed, for example, to the water box and which puts the upper end of the latter in communication with the expansion tank, opening into the latter below the level of the liquid. contained therein in normal operation, to prevent an air intake in the cooling circuit when the engine is stopped. The arrangement and fixing of this tube are inconvenient to produce and lead to an increase in the cost of the exchanger.

L'invention a pour objet d'éviter ces inconvénients tout en assurant un dégazage correct du liquide de refroi­dissement.The object of the invention is to avoid these drawbacks while ensuring correct degassing of the coolant.

Elle propose à cet effet un dispositif de boîte à eau et de vase d'expansion pour un échangeur de chaleur, tel qu'un radiateur d'un circuit de refroidissement de moteur à combustion interne, dans lequel la boîte à eau et le vase d'expansion forment un ensemble monobloc moulé en une seule pièce, la boîte à eau étant à dispo­sition générale verticale et comprenant une cloison interne la séparant en deux compartiments dans lesquels débouchent respectivement un embout supérieur d'entrée de liquide et un embout inférieur de sortie de liquide formés avec la boîte à eau, caractérisé en ce que l'embout d'entrée de liquide est sensiblement adjacent à la cloison interne de la boîte à eau et au vase d'expansion et en ce qu'un passage de dégazage de liquide comprend un orifice formé au travers d'une paroi de séparation entre la boîte à eau et le vase d'expansion, cet orifice débou­chant directement d'une part dans l'embout d'entrée de liquide et d'autre part dans le vase d'expansion sous le niveau du liquide qui y est normalement contenu.To this end, it provides a water box and expansion tank device for a heat exchanger, such as a radiator of a cooling circuit of an internal combustion engine, in which the water box and the tank expansion form a one-piece assembly molded in one piece, the water box being generally vertical and comprising an internal partition separating it into two compartments into which an upper liquid inlet nozzle and a lower outlet nozzle respectively open liquids formed with the water box, characterized in that the liquid inlet nozzle is substantially adjacent to the internal partition of the water box and to the expansion tank and in that a liquid degassing passage comprises an orifice formed through a partition wall between the water box and the expansion tank, this orifice opening directly on the one hand into the liquid inlet nozzle and on the other hand into the expansion below level of the liquid normally contained therein.

La boîte à eau du dispositif selon l'invention est donc formée directement avec un embout d'entrée de liquide qui débouche, non pas dans sa partie supérieure,mais dans sa partie médiane immédiatement au-dessus de la cloison interne, ce qui permet d'associer à cet embout d'entrée de liquide un passage de dégazage formé par un simple orifice dans la paroi séparant la boîte à eau ou l'embout d'entrée de liquide du vase d'expansion.The water box of the device according to the invention is therefore formed directly with a liquid inlet nozzle which opens, not in its upper part, but in its middle part immediately above the internal partition, which allows d 'Associate with this liquid inlet nozzle a degassing passage formed by a simple orifice in the wall separating the water box or the liquid inlet nozzle of the expansion tank.

Cet orifice débouche directement dans le vase d'expansion sous le niveau du liquide qui y est normalement contenu, ce qui évite toute reprise d'air ou de gaz dans le circuit de refroidissement.This orifice opens directly into the expansion tank below the level of the liquid which is normally contained therein, which prevents any recovery of air or gas in the cooling circuit.

Selon une autre caractéristique de l'invention, le vase d'expansion comprend, au niveau de cet orifice, un rebord tubulaire interne qui est orienté vers l'extrémité supé­rieure du vase d'expansion pour le guidage des bulles d'air ou de gaz sortant par cet orifice.According to another characteristic of the invention, the expansion vessel comprises, at this orifice, an internal tubular rim which is oriented towards the upper end of the expansion vessel for guiding the air or gas bubbles exiting through this orifice.

Avantageusement, un orifice supplémentaire est formé à travers la paroi séparant le vase d'expansion et la boîte à eau, cet orifice débouchant dans la boîte à eau immédiatement en dessous de la cloison interne de celle-ci, pour former également un passage de dégazage de liquide.Advantageously, an additional orifice is formed through the wall separating the expansion tank and the water box, this orifice opening into the water box immediately below the internal partition of the latter, to also form a degassing passage. liquid.

Il se peut en effet que le dégazage assuré par le premier orifice ne soit pas complet. Dans ce cas, des bulles d'air et de gaz seront véhiculées par le liquide circulant dans l'échangeur et se rassembleront dans le compartiment inférieur de la boîte à eau, en dessous de la cloison interne de celle-ci. L'orifice supplémentaire permet à ces bulles d'air ou de gaz de gagner le vase d'expansion.It is possible that the degassing provided by the first orifice is not complete. In this case, air and gas bubbles will be transported by the liquid circulating in the exchanger and will gather in the lower compartment of the water box, below the internal partition of the latter. The additional opening allows these air or gas bubbles to reach the expansion tank.

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

  • - la figure 1 est une vue schématique, en coupe partielle, d'un échangeur de chaleur connu;
  • - la figure 2 est une vue correspondant à la figure 1, mais représentant cet échangeur de chaleur équipé d'un dispositif de boîte à eau et de vase d'expansion selon l'invention.
In the description which follows, given by way of example, reference is made to the appended drawings in which:
  • - Figure 1 is a schematic view, in partial section, of a known heat exchanger;
  • - Figure 2 is a view corresponding to Figure 1, but showing this heat exchanger equipped with a water box device and expansion tank according to the invention.

On se réfère d'abord à la figure 1, qui représente un échangeur dechaleur connu, destiné à former un radiateur d'un circuit de refroidissement d'un moteur à combustion interne de véhicule automobile.Reference is first made to FIG. 1, which represents a known heat exchanger, intended to form a radiator of a cooling circuit of an internal combustion engine of a motor vehicle.

De façon classique, cet échangeur 10 comprend un faisceau 12 de tubes horizontaux de circulation de liquide, aux extrémités duquel sont montées deux boîtes à eau 14 et 16. La boîte à eau 16 comprend, dans sa partie supérieu­re, un embout 18 d'entrée de liquide dans l'échangeur et, à sa partie inférieure, un embout 20 de sortie de liquide. Une cloison médiane 22 partage l'espace interne de la boîte à eau en deux compartiments séparés de façon étanche lorsque la boîte à eau 16 est montée sur l'extrémi­té du faisceau de tubes 12.Conventionally, this exchanger 10 comprises a bundle 12 of horizontal liquid circulation tubes, at the ends of which are mounted two water boxes 14 and 16. The water box 16 comprises, in its upper part, an inlet nozzle 18 liquid in the exchanger and, at its lower part, a liquid outlet nozzle 20. A central partition 22 divides the internal space of the water box into two watertight separate compartments when the water box 16 is mounted on the end of the bundle of tubes 12.

La boîte à eau 16 est formée de moulage avec un vase d'expansion 24 à disposition générale verticale, comme les boîtes à eau 14 et 16, et qui est par exemple adja­cent à la boîte à eau 16. A son extrémité supérieure, le vase d'expansion 24 comprend un orifice ou embout de remplissage, fermé par un bouchon 26 muni de clapets tarés de surpression et de dépression. A son extrémité inférieure, le vase d'expansion 24 communique avec l'extrémité inférieure de la boîte à eau 16 ou avec l'embout de sortie 20 par un orifice ou conduit 28 de retour de liquide dans le circuit de refroidissement.The water box 16 is formed by molding with a generally vertical expansion tank 24, like the water boxes 14 and 16, and which is for example adjacent to the water box 16. At its upper end, the tank expansion 24 includes a filling orifice or nozzle, closed by a plug 26 provided with calibrated overpressure and vacuum valves. At its lower end, the expansion vessel 24 communicates with the lower end of the water box 16 or with the outlet nozzle 20 through an orifice or conduit 28 for the return of liquid in the cooling circuit.

Un petit tube 30 est fixé dans la boîte à eau 16 pour relier la partie supérieure de celle-ci au vase d'expan­sion 24. L'extrémité inférieure du tube 30 s'étend en dessous du niveau 32 du liquide qui est normalement contenu dans le vase d'expansion 24 et pénètre dans ce vase d'expansion par un orifice de la paroi 34 de séparation entre le vase d'expansion et la boîte à eau.A small tube 30 is fixed in the water box 16 to connect the upper part thereof to the expansion tank 24. The lower end of the tube 30 extends below the level 32 of the liquid which is normally contained in the expansion vessel 24 and enters this expansion vessel through an orifice in the wall 34 of separation between the expansion vessel and the water box.

En fonctionnement, lorsque le liquide de refroidissement amené par l'embout 18 dans la boîte à eau 16 circule dans l'échangeur,les bulles d'air ou de gaz véhiculées par ce liquide ont tendance à se rassembler en partie supérieure de la boîte à eau 16. Ces bulles d'air sont aspirées par le tube 30 et gagnent le vase d'expansion 24, en raison de la dépression relative qui règne dans celui-ci. Elles sortent de l'extrémité inférieure du tube 30 et remontent jusqu'au niveau 32 du liquide contenu dans le vase d'expansion 24.In operation, when the coolant brought by the nozzle 18 into the water box 16 circulates in the exchanger, the air or gas bubbles conveyed by this liquid tend to collect in the upper part of the water box 16. These air bubbles are sucked by the tube 30 and reach the expansion tank 24, due to the relative depression which prevails therein. They exit from the lower end of the tube 30 and go up to the level 32 of the liquid contained in the expansion tank 24.

Pour éviter les inconvénients liés à la disposition et à la fixation du tube 30 dans la boîte à eau 16, l'invention propose, come représenté en figure 2, de former cette boîte à eau avec un embout d'entrée de liquide qui débouche, non en partie supérieure de la boîte à eau, mais sensiblement dans sa partie médiane.To avoid the drawbacks linked to the arrangement and fixing of the tube 30 in the water box 16, the invention proposes, as shown in FIG. 2, to form this water box with a liquid inlet nozzle which opens out, not in the upper part of the water box, but substantially in its middle part.

Dans la figure 2, la boîte à eau 36 qui est monobloc avec le vase d'expansion 38 comprend également une cloison médiane 40 qui y forme un compartiment supérieur 42 et un compartiment inférieur 43. L'embout 44 d'entrée de liquide dans le radiateur débouche dans le compartiment supérieur 42 de la boîte à eau 36, au niveau de la cloison médiane 40, et l'embout 46 de sortie de liquide est formé en partie inférieure de la boîte à eau, de façon classique.In FIG. 2, the water box 36 which is integral with the expansion tank 38 also includes a central partition 40 which forms an upper compartment 42 and a lower compartment 43 therein. The nozzle 44 for entering the liquid in the radiator opens into the upper compartment 42 of the water box 36, at the middle partition 40, and the nozzle 46 for the liquid outlet is formed in the lower part of the water box, in a conventional manner.

Un passage de dégazage de liquide comprend un orifice 48 formé dans une paroi 50 de séparation entre le vase d'expansion 38 et l'embout d'entrée 44 ou le compartiment supérieur 42 de la boîte à eau, cet orifice 48 reliant directement le vase d'expansion 38 à l'embout d'entrée 44 et débouchant nécessairement sous le niveau 52 du liquide contenu normalement dans le vase d'expansion.A liquid degassing passage comprises an orifice 48 formed in a wall 50 of separation between the expansion vessel 38 and the inlet nozzle 44 or the upper compartment 42 of the water box, this orifice 48 directly connecting the vessel 38 at the inlet end 44 and necessarily opening below the level 52 of the liquid normally contained in the expansion tank.

Ce dernier peut être formé avec un rebord tubulaire interne 54, immédiatement en dessous de l'orifice 48, ce rebord 54 étant orienté vers l'extrémité supérieure du vase d'expansion pour former un guidage vers le haut des bulles d'air et de gaz sortant par l'orifice 48.The latter can be formed with an internal tubular rim 54, immediately below the orifice 48, this rim 54 being oriented towards the upper end of the expansion vessel to form an upward guide of the air and gas bubbles leaving through the orifice 48.

De façon classique, l'extrémité inférieure du vase d'ex­pansion communique avec l'extrémité inférieure de la boîte à eau 36 ou avec l'embout de sortie 46.Conventionally, the lower end of the expansion vessel communicates with the lower end of the water box 36 or with the outlet nozzle 46.

Pour améliorer le dégazage, on peut former un orifice 56 dans la paroi séparant le vase d'expansion 38 du compartiment inférieur 43 de la boîte à eau,immédiatement en dessous de la cloison médiane 40.To improve degassing, an orifice 56 can be formed in the wall separating the expansion tank 38 from the lower compartment 43 of the water box, immediately below the central partition 40.

En fonctionnement, le liquide de refroidissement est amené dans la boîte à eau 36 par l'embout 44. Des bulles d'air ou de gaz véhiculées par ce liquide sont aspirées dans le vase d'expansion 38 par l'orifice 48. Le liquide circule dans le faisceau de tubes 12 et dans l'autre boîte à eau 14, comme indiqué par les flèches, et revient dans le compartiment inférieur 43 de la boîte à eau 36, d'où il sort par l'embout 46. Si ce liquide contient encore des bulles d'air ou de gaz, celles-ci ont tendance à se rassembler en haut du compartiment inférieur 43, sous la cloison 40, et sont alors aspirées dans le vase d'expansion 38 par l'orifice 56.In operation, the coolant is brought into the water box 36 through the nozzle 44. Air or gas bubbles carried by this liquid are drawn into the expansion tank 38 through the orifice 48. The liquid circulates in the bundle of tubes 12 and in the other water box 14, as indicated by the arrows, and returns to the lower compartment 43 of the water box 36, from where it exits via the end piece 46. If this liquid still contains air or gas bubbles, these tend to collect at the top of the lower compartment 43, under the partition 40, and are then sucked into the expansion tank 38 through the orifice 56.

On obtient ici un dégazage excellent du liquide circulant dans l'échangeur de chaleur.An excellent degassing of the liquid circulating in the heat exchanger is obtained here.

Dans certains cas, la boîte à eau 36 et le vase d'expansion 38 moulés en une seule pièce ne sont pas adjacents, mais légèrement écartés l'un de l'autre et ne présentent pas de paroi commune dans laquelle pourraient être formés les orifices 48 et 56. Dans ce cas, ces orifices sont remplacés par de petits conduits horizontaux qui sont formés de moulage avec la boîte à eau et le vase d'expan­ion au niveau des orifices 48 et 56 et qui peuvent être démoulés commodément par la face ouverte de la boîte à eau Il s'agit là d'une simple équivalence à la portée de l'homme du métier.In some cases, the water box 36 and the expansion tank 38 molded in one piece are not adjacent, but slightly spaced from each other and do not have a common wall in which the orifices could be formed. 48 and 56. In this case, these orifices are replaced by small horizontal conduits which are formed by molding with the water box and the expansion vessel at the level of orifices 48 and 56 and which can be demolded conveniently by the open face of the water box This is a simple equivalent to the scope of the skilled person.

Claims (4)

1. Dispositif de boîte à eau et de vase d'expansion pour un échangeur de chaleur tel qu'un radiateur d'un circuit de refroidissement de moteur à combustion interne, dans lequel la boîte à eau (36) et le vase d'expansion (38) forment un ensemble monobloc moulé en une seule pièce, la boîte à eau (36) étant à disposition générale verticale et comprenant une cloison interne (40) la séparant en deux compartiments dans lesquels débouchent respectivement un embout supérieur (44) d'entrée de liquide et un embout inférieur (46) de sortie de liquide formés avec la boîte à eau, caractérisé en ce que l'embout (44) d'entrée de liquide est sensiblement adjacent à la cloison interne (40) de la boîte à eau (36) et en ce qu'un passage de dégazage de liquide comprend un orifice (48) formé au travers d'une paroi de séparation entre la boîte à eau (36) et le vase d'expansion (38), cet orifice débouchant directement d'une part dans l'embout d'entrée (44) et d'autre part dans le vase d'expansion (38) sous le niveau (52) du liquide qui y est normalement contenu.1. A water box and expansion tank device for a heat exchanger such as a radiator of a cooling circuit of an internal combustion engine, in which the water box (36) and the expansion tank (38) form a one-piece assembly molded in one piece, the water box (36) being generally vertical and comprising an internal partition (40) separating it into two compartments into which an upper end piece (44) respectively opens. liquid inlet and a lower liquid outlet nozzle (46) formed with the water box, characterized in that the liquid inlet nozzle (44) is substantially adjacent to the internal partition (40) of the water box water (36) and in that a liquid degassing passage comprises an orifice (48) formed through a partition wall between the water box (36) and the expansion tank (38), this orifice opening directly on the one hand into the inlet nozzle (44) and on the other hand into the expansion tank (38) under the e level (52) of the liquid which is normally contained therein. 2. Dispositif selon la revendication 1, caractérisé en ce que le vase d'expansion (38) comprend, au niveau de cet orifice (48), un rebord tubulaire interne (54) orienté vers l'extrémité supérieure du vase d'expansion pour le guidage des bulles d'air ou de gaz.2. Device according to claim 1, characterized in that the expansion vessel (38) comprises, at this orifice (48), an internal tubular rim (54) oriented towards the upper end of the expansion vessel for guiding air or gas bubbles. 3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'un orifice supplémentaire (56) est formé à travers la paroi séparant le vase d'expansion (38) et la boîte à eau (36), cet orifice (56) débouchant dans la boîte à eau (36) immédiatement en dessous de la cloison interne (40) de celle-ci et formant également un passage de dégazage de liquide.3. Device according to claim 1 or 2, characterized in that an additional orifice (56) is formed through the wall separating the expansion tank (38) and the water box (36), this orifice (56) opening into the water box (36) immediately below the internal partition (40) thereof and also forming a liquid degassing passage. 4. Dispositif selon l'une des revendication précédentes, caractérisé en ce que, lorque la boîte à eau et le vase d'expansion moulés en une seule pièce ne sont pas adjacents, mais écartés l'un de l'autre, le ou les passages de dégazage comprennent des conduits moulés d'une pièce avec la boîte à eau et le vase d'expansion et remplaçant le ou les orifices précités (48, 56).4. Device according to one of the preceding claims, characterized in that, when the water box and the expansion tank molded in one piece are not adjacent, but spaced from one another, the degassing passages comprise pipes molded in one piece with the water box and the expansion tank and replacing the abovementioned orifice (s) (48, 56).
EP86402176A 1985-10-15 1986-10-02 Water box and expansion chamber for a heat exchanger Expired - Lifetime EP0219417B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8515275 1985-10-15
FR8515275A FR2588647B1 (en) 1985-10-15 1985-10-15 WATER BOX AND EXPANSION VESSEL DEVICE FOR HEAT EXCHANGER

Publications (2)

Publication Number Publication Date
EP0219417A1 true EP0219417A1 (en) 1987-04-22
EP0219417B1 EP0219417B1 (en) 1991-12-27

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ID=9323836

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Application Number Title Priority Date Filing Date
EP86402176A Expired - Lifetime EP0219417B1 (en) 1985-10-15 1986-10-02 Water box and expansion chamber for a heat exchanger

Country Status (7)

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US (1) US4747446A (en)
EP (1) EP0219417B1 (en)
BR (1) BR8605000A (en)
DE (1) DE3683121D1 (en)
ES (1) ES2027966T3 (en)
FR (1) FR2588647B1 (en)
MX (1) MX159920A (en)

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* Cited by examiner, † Cited by third party
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DE3924550A1 (en) * 1989-07-25 1991-01-31 Daimler Benz Ag HEAT EXCHANGER, ESPECIALLY HEAT EXCHANGER IN THE ENGINE COOLING CIRCUIT OF A MOTOR VEHICLE
US5762130A (en) * 1996-12-09 1998-06-09 General Motors Corporation Down flow, two pass radiator with air venting means
US6123144A (en) * 1997-04-15 2000-09-26 Cummins Engine Company, Inc. Integrated heat exchanger and expansion tank
US6019171A (en) * 1998-11-18 2000-02-01 General Motors Corporation Down flow, two pass radiator with automatic air venting means
DE10062205A1 (en) * 2000-12-13 2002-06-20 Modine Mfg Co Cross-flow radiator
US20130327511A1 (en) 2012-06-06 2013-12-12 Tesla Motors, Inc. Passive air bleed for improved cooling systems

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Publication number Priority date Publication date Assignee Title
EP0029373A1 (en) * 1979-11-16 1981-05-27 Societe Anonyme Des Usines Chausson Self-purging heat-exchanger for engine cooling circuits
FR2483798A1 (en) * 1980-06-06 1981-12-11 Valeo DEVICE FOR DEGASSING A LIQUID CIRCULATING IN A HEAT EXCHANGER
FR2506001A1 (en) * 1981-05-12 1982-11-19 Valeo WATER BOX DEVICE AND EXPANSION TANK FOR HEAT EXCHANGER
FR2514484A1 (en) * 1981-10-12 1983-04-15 Valeo Header tank for vehicle radiator - has collector and separator chambers with partition and gas passage
FR2532740A1 (en) * 1982-09-03 1984-03-09 Valeo Diesel engine with radiator of cooling system circuit

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Publication number Priority date Publication date Assignee Title
US4116268A (en) * 1975-10-10 1978-09-26 Volkswagenwerk Aktiengesellschaft Water tank for transverse flow radiator
FR2536522A1 (en) * 1982-11-18 1984-05-25 Valeo WATER BOX COMPRISING A DEGASSING PASSAGE AND HEAT EXCHANGER COMPRISING SUCH A BOX OF WATER
DE3446007C2 (en) * 1983-12-28 1995-09-14 Valeo Water tank and expansion tank for a heat exchanger of an internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029373A1 (en) * 1979-11-16 1981-05-27 Societe Anonyme Des Usines Chausson Self-purging heat-exchanger for engine cooling circuits
FR2483798A1 (en) * 1980-06-06 1981-12-11 Valeo DEVICE FOR DEGASSING A LIQUID CIRCULATING IN A HEAT EXCHANGER
FR2506001A1 (en) * 1981-05-12 1982-11-19 Valeo WATER BOX DEVICE AND EXPANSION TANK FOR HEAT EXCHANGER
FR2514484A1 (en) * 1981-10-12 1983-04-15 Valeo Header tank for vehicle radiator - has collector and separator chambers with partition and gas passage
FR2532740A1 (en) * 1982-09-03 1984-03-09 Valeo Diesel engine with radiator of cooling system circuit

Also Published As

Publication number Publication date
BR8605000A (en) 1987-07-14
DE3683121D1 (en) 1992-02-06
FR2588647A1 (en) 1987-04-17
ES2027966T3 (en) 1992-07-01
MX159920A (en) 1989-10-04
FR2588647B1 (en) 1987-12-31
EP0219417B1 (en) 1991-12-27
US4747446A (en) 1988-05-31

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