EP0714009A1 - Method of cooling and heat exchanger with two circuits - Google Patents
Method of cooling and heat exchanger with two circuits Download PDFInfo
- Publication number
- EP0714009A1 EP0714009A1 EP95117972A EP95117972A EP0714009A1 EP 0714009 A1 EP0714009 A1 EP 0714009A1 EP 95117972 A EP95117972 A EP 95117972A EP 95117972 A EP95117972 A EP 95117972A EP 0714009 A1 EP0714009 A1 EP 0714009A1
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- European Patent Office
- Prior art keywords
- circuit
- compartment
- compartments
- tubes
- fluid
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Classifications
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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
- F28F9/0202—Header boxes having their inner space divided by partitions
- F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
- F28F9/0209—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions
- F28F9/0212—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions the partitions being separate elements attached to header boxes
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- 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
- F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
- F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
- F28D1/0443—Combination of units extending one beside or one above the other
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- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0082—Charged air coolers
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- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0091—Radiators
- F28D2021/0094—Radiators for recooling the engine coolant
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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
- F28F2009/0285—Other particular headers or end plates
- F28F2009/0287—Other particular headers or end plates having passages for different heat exchange media
Definitions
- the invention relates to cooling circuits with heat exchangers, in particular for motor vehicles.
- a cooling circuit suitable for circulating a heat transfer fluid, generally water with antifreeze, through the engine block to draw energy there. calorific and return it to the outside environment by heat exchange with air in a heat exchanger, commonly called cooling radiator.
- this heat transfer fluid in one or more secondary cooling circuits, in particular for cooling the lubricating oil of the engine or also for cooling the charge air coming from a turbo-compressor.
- FR-A-2 634 546 proposes to use the same radiator for cooling the heat transfer fluid.
- This document describes in particular a method of cooling, in particular the heat engine of a motor vehicle, using at least a first circuit and a second circuit of heat transfer fluid which have in common a multiple heat exchanger comprising a bundle of circulation tubes of heat transfer fluid comprising at least one row of substantially parallel tubes, each tube passing through a perforated wall or manifold of at least one fluid box, the latter being divided by partitions, at least in the vicinity of the manifold, into several compartments each of which communicates with a subset of the tubes of the row, a first of said compartments belonging to the first circuit and at least two other compartments, among which a second compartment adjacent to the first, belonging to the second circuit in which they are arranged in series by means of circulation tubes, process comprising phases during which the heat transfer fluid circulates simultaneously in the first and second circuits and other phases at during which the heat transfer fluid circulates in the second circuit and
- the first circuit can be used in particular for cooling the heat engine, and the second circuit for cooling the charge air, the heat transfer fluid of this second circuit circulating in several passes in the heat exchanger to be brought to a higher temperature. lower than that of the first circuit.
- FIG. 1 schematically shows a cooling radiator according to the teaching of FR-A-2 634 546.
- This radiator comprises two fluid boxes 1 and 2 and a bundle of tubes 3.
- the fluid box 1 is divided by partitions transverse into three successive compartments 4, 5 and 6, two inlet pipes 7 and 8 opening respectively into compartments 4 and 5.
- the fluid box 2 is similarly divided into three successive compartments 9, 10 and 11, two outlet pipes 12 and 13 opening respectively into compartments 9 and 11.
- Such a heat exchanger can be mounted in two cooling circuits, namely a cooling circuit of the engine of a motor vehicle in which the coolant enters the compartment 4 through the tubing 7, then passes into the compartment 9 via the tubes and out through the tubing 12, and a charge air cooling circuit in which the heat transfer fluid enters the compartment 5 through the tubing 8, passes successively into the compartments 10, 6 and 11 via the tubes and exits through the tubing 13.
- the tubes connecting the compartments 4 and 9, in which the fluid does not circulate are at room temperature (for example 20 ° C), while those connecting the compartments 5 and 10 are approximately at the temperature of the fluid at its entry into the exchanger (for example 90 ° C), i.e. a temperature difference of 70 ° C between the two sub-assemblies.
- the tubes are generally rigidly connected to the fluid boxes, for example by brazing to the manifolds, the difference in expansion resulting from this temperature difference between two neighboring sub-assemblies results in excessive mechanical stresses.
- the object of the invention is to remedy this drawback.
- the invention relates in particular to a method as defined above, and provides that at least one of said compartments belonging to the second circuit is located there upstream of said second compartment.
- the subject of the invention is also a multiple heat exchanger suitable for implementing the method as defined above, comprising a bundle of tubes for circulation of heat-transfer fluid comprising at least one row of substantially parallel tubes, each tube passing through a perforated wall or collector of at least one fluid box, the latter being divided by partitions, at least in the vicinity of the collector, into several compartments each of which communicates with a subset of the tubes of the row, a first of said compartments belonging to a first heat transfer fluid circuit and at least one second compartment, adjacent to the first, and a third compartment belonging to a second heat transfer fluid circuit in which they are arranged in series by means of circulation tubes and where appropriate of intermediate compartments and / or of another fluid box, characterized in that the first and third fifth compartments are interconnected by an internal channel of the fluid box to be supplied by the same fluid inlet pipe, said channel being limited by a wall adjacent to the second compartment and where appropriate to said intermediate compartments.
- one of said outer walls advantageously has, in the extension of the channel, a demolding opening which can be closed. by a plug.
- FIG. 2 the same reference numbers are used as in FIG. 1 to designate identical or analogous elements.
- the portion of the heat exchanger used by the cooling circuit of the heat engine, comprising the inlet pipe 7 and the compartment 4 of the fluid box 1, a first subset of the tubes 3, the compartment 9 and the outlet manifold 12 of the fluid box 2, is unchanged with respect to FIG. 1.
- the portion used by the charge air cooling circuit, the internal configuration of which is the same as in FIG. 1, is oriented differently.
- the compartment 6 is located between the compartments 4 and 5, and the compartment 11 between the compartments 9 and 10.
- the circulation tubes of the second circuit closest to the circulation tubes of the first circuit are those connecting the compartments 6 and 11.
- the fluid circulating in these tubes is for example at a temperature of 45 ° C, reducing the difference to 25 ° C temperature with the tubes of the first sub-assembly when there is no fluid circulating therein, thus considerably limiting the stresses produced by differential expansion.
- the fluid circulating between compartments 4 and 9 is at 90 ° C and that circulating between compartments 6 and 11 is at 45 °, i.e. a temperature difference 45 ° C
- the fluid flowing in the two subsets of neighboring tubes, between compartments 4 and 9 and between compartments 5 and 10 was at the same temperature of 90 ° C .
- the arrangement according to the invention therefore creates in this case a differential expansion which did not exist in the state of the art.
- the important result is that the maximum temperature difference across all operating phases, between neighboring tubes belonging to the two circuits is significantly lower (45 ° C) in the configuration according to the invention than in the known configuration (70 ° C).
- the fluid box 2 and the tube bundle 3 of FIG. 3 are identical to the corresponding elements of FIG. 2.
- the fluid box 1 of FIG. 3 differs from that of FIG. 2 in that the compartments 4 and 5, which are separated from one another by the compartment 6 in contact with the perforated plate or collector 14 traversed by the tubes 3, are connected together by a channel 15 remote from the manifold, this channel being separated from the compartment 6 by a wall 16 extending in the longitudinal direction of the fluid box.
- the channel 15 makes it possible to supply the compartments 4 and 5 from the same inlet pipe 7, the pipe 8 being removed, which simplifies the entire cooling circuit.
- the fluid box 1 is formed by assembling the manifold 14 and a molded plastic part defining the outer walls, the tubing 7, the partitions between the compartments and the wall 16.
- a core is present in the channel 15.
- this core is extracted by a movement in the longitudinal direction of the fluid box, leaving an opening 17 in an end wall 18 of the fluid box. This opening must then be closed by means of a plug 19, for example by welding.
- the inlet pipes of the two circuits are on the first fluid box and the outlet pipes of the two circuits are on the second fluid box.
- the two inlet pipes, and / or the two outlet pipes can be placed on the two fluid boxes respectively.
- the inlet and outlet pipes of the same circuit can be on the same fluid box.
- the second fluid box can be eliminated entirely or partially, the corresponding rectilinear tubes being replaced two by two, in known manner, by U-shaped or hairpin tubes.
- the heat exchanger according to the invention can be used, in addition to the first and second circuits, for other circuits.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
L'invention concerne les circuits de refroidissement à échangeurs de chaleur, en particulier pour véhicules automobiles.The invention relates to cooling circuits with heat exchangers, in particular for motor vehicles.
Pour refroidir un moteur à combustion interne d'un véhicule automobile, on utilise classiquement un circuit de refroidissement propre à faire circuler un fluide caloporteur, généralement de l'eau additionnée d'antigel, à travers le bloc moteur pour y prélever de l'énergie calorifique et la restituer au milieu extérieur par échange thermique avec de l'air dans un échangeur de chaleur, communément appelé radiateur de refroidissement.To cool an internal combustion engine of a motor vehicle, conventionally a cooling circuit suitable for circulating a heat transfer fluid, generally water with antifreeze, through the engine block to draw energy there. calorific and return it to the outside environment by heat exchange with air in a heat exchanger, commonly called cooling radiator.
Il est connu également d'utiliser ce fluide caloporteur dans un ou plusieurs circuits de refroidissement secondaires, notamment pour refroidir l'huile de lubrification du moteur ou encore pour refroidir l'air de suralimentation provenant d'un turbo-compresseur.It is also known to use this heat transfer fluid in one or more secondary cooling circuits, in particular for cooling the lubricating oil of the engine or also for cooling the charge air coming from a turbo-compressor.
Pour limiter l'encombrement et le coût de l'ensemble des circuits, FR-A-2 634 546 propose d'y utiliser le même radiateur pour le refroidissement du fluide caloporteur. Ce document décrit en particulier un procédé de refroidissement, notamment du moteur thermique d'un véhicule automobile, utilisant au moins un premier circuit et un second circuit de fluide caloporteur qui ont en commun un échangeur de chaleur multiple comprenant un faisceau de tubes de circulation de fluide caloporteur comportant au moins une rangée de tubes sensiblement parallèles, chaque tube traversant une paroi perforée ou collecteur d'au moins une boîte à fluide, cette dernière étant divisée par des cloisons, au moins au voisinage du collecteur, en plusieurs compartiments dont chacun communique avec un sous-ensemble des tubes de la rangée, un premier desdits compartiments appartenant au premier circuit et au moins deux autres compartiments, parmi lesquels un second compartiment adjacent au premier, appartenant au second circuit dans lequel ils sont disposés en série par l'intermédiaire de tubes de circulation, procédé comportant des phases au cours desquelles le fluide caloporteur circule simultanément dans les premier et second circuits et d'autres phases au cours desquelles le fluide caloporteur circule dans le second circuit et non dans le premier circuit.To limit the size and the cost of all the circuits, FR-A-2 634 546 proposes to use the same radiator for cooling the heat transfer fluid. This document describes in particular a method of cooling, in particular the heat engine of a motor vehicle, using at least a first circuit and a second circuit of heat transfer fluid which have in common a multiple heat exchanger comprising a bundle of circulation tubes of heat transfer fluid comprising at least one row of substantially parallel tubes, each tube passing through a perforated wall or manifold of at least one fluid box, the latter being divided by partitions, at least in the vicinity of the manifold, into several compartments each of which communicates with a subset of the tubes of the row, a first of said compartments belonging to the first circuit and at least two other compartments, among which a second compartment adjacent to the first, belonging to the second circuit in which they are arranged in series by means of circulation tubes, process comprising phases during which the heat transfer fluid circulates simultaneously in the first and second circuits and other phases at during which the heat transfer fluid circulates in the second circuit and not in the first circuit.
Le premier circuit peut servir en particulier au refroidissement du moteur thermique, et le second circuit au refroidissement de l'air de suralimentation, le fluide caloporteur de ce second circuit circulant en plusieurs passes dans l'échangeur de chaleur pour être amené à une température plus basse que celui du premier circuit.The first circuit can be used in particular for cooling the heat engine, and the second circuit for cooling the charge air, the heat transfer fluid of this second circuit circulating in several passes in the heat exchanger to be brought to a higher temperature. lower than that of the first circuit.
La figure 1 montre schématiquement un radiateur de refroidissement conforme à l'enseignement de FR-A-2 634 546. Ce radiateur comprend deux boîtes à fluide 1 et 2 et un faisceau de tubes 3. La boîte à fluide 1 est divisée par des cloisons transversales en trois compartiments successifs 4, 5 et 6, deux tubulures d'entrée 7 et 8 débouchant respectivement dans les compartiments 4 et 5. La boîte à fluide 2 est divisée de la même façon en trois compartiments successifs 9, 10 et 11, deux tubulures de sortie 12 et 13 débouchant respectivement dans les compartiments 9 et 11. Un tel échangeur de chaleur peut être monté dans deux circuits de refroidissement, à savoir un circuit de refroidissement du moteur d'un véhicule automobile dans lequel le fluide caloporteur entre dans le compartiment 4 par la tubulure 7, puis passe dans le compartiment 9 par l'intermédiaire des tubes et en ressort par la tubulure 12, et un circuit de refroidissement d'air de suralimentation dans lequel le fluide caloporteur pénètre dans le compartiment 5 par la tubulure 8, passe successivement dans les compartiments 10, 6 et 11 par l'intermédiaire des tubes et ressort par la tubulure 13.Figure 1 schematically shows a cooling radiator according to the teaching of FR-A-2 634 546. This radiator comprises two
Lorsque le fluide circule dans le second circuit et non dans le premier circuit (par exemple lors du démarrage du moteur à froid), les tubes reliant les compartiments 4 et 9, dans lesquels le fluide ne circule pas, sont à la température ambiante (par exemple 20°C), tandis que ceux reliant les compartiments 5 et 10 sont a peu près à la température du fluide à son entrée dans l'échangeur (par exemple 90°C), soit une différence de température de 70°C entre les deux sous-ensembles. Les tubes étant généralement reliés de façon rigide aux boîtes à fluide, par exemple par brasage aux collecteurs, la différence de dilatation résultant de cette différence de température entre deux sous-ensembles voisins entraîne des contraintes mécaniques excessives.When the fluid circulates in the second circuit and not in the first circuit (for example when starting the engine cold), the tubes connecting the
Le but de l'invention est de remédier à cet inconvénient.The object of the invention is to remedy this drawback.
L'invention vise notamment un procédé tel que défini ci-dessus, et prévoit que l'un au moins desdits compartiments appartenant au second circuit y est situé en amont dudit second compartiment.The invention relates in particular to a method as defined above, and provides that at least one of said compartments belonging to the second circuit is located there upstream of said second compartment.
D'autres caractéristiques, complémentaires ou alternatives, de l'invention sont énoncées ci-après :
- Les tubes sont reliés entre eux de façon rigide, à chacune de leurs extrémités.
- Les tubes sont reliés entre eux de façon rigide par l'intermédiaire du collecteur.
- Le second compartiment est celui situé le plus en aval dans le second circuit.
- Le fluide caloporteur du premier circuit et celui du second circuit pénètrent dans ledit échangeur de chaleur multiple respectivement par le premier compartiment et par un troisième compartiment de la boîte à fluide.
- Le premier compartiment est le seul compartiment de la boîte à fluide appartenant au premier circuit.
- The tubes are rigidly connected to each other at each of their ends.
- The tubes are rigidly connected to each other via the manifold.
- The second compartment is the one furthest downstream in the second circuit.
- The heat transfer fluid of the first circuit and that of the second circuit enter said multiple heat exchanger respectively through the first compartment and through a third compartment of the fluid box.
- The first compartment is the only compartment of the fluid box belonging to the first circuit.
L'invention a également pour objet un échangeur de chaleur multiple convenant à la mise en oeuvre du procédé tel que défini ci-dessus, comprenant un faisceau de tubes de circulation de fluide caloporteur comportant au moins une rangée de tubes sensiblement parallèles, chaque tube traversant une paroi perforée ou collecteur d'au moins une boîte à fluide, cette dernière étant divisée par des cloisons, au moins au voisinage du collecteur, en plusieurs compartiments dont chacun communique avec un sous-ensemble des tubes de la rangée, un premier desdits compartiments appartenant à un premier circuit de fluide caloporteur et au moins un second compartiment, adjacent au premier, et un troisième compartiment appartenant à un second circuit de fluide caloporteur dans lequel ils sont disposés en série par l'intermédiaire de tubes de circulation et le cas échéant de compartiments intermédiaires et/ou d'une autre boîte à fluide, caractérisé en ce que les premier et troisième compartiments sont reliés entre eux par un canal interne de la boîte à fluide pour être alimentés par une même tubulure d'entrée de fluide, ledit canal étant limité par une paroi adjacente au second compartiment et le cas échéant auxdits compartiments intermédiaires.The subject of the invention is also a multiple heat exchanger suitable for implementing the method as defined above, comprising a bundle of tubes for circulation of heat-transfer fluid comprising at least one row of substantially parallel tubes, each tube passing through a perforated wall or collector of at least one fluid box, the latter being divided by partitions, at least in the vicinity of the collector, into several compartments each of which communicates with a subset of the tubes of the row, a first of said compartments belonging to a first heat transfer fluid circuit and at least one second compartment, adjacent to the first, and a third compartment belonging to a second heat transfer fluid circuit in which they are arranged in series by means of circulation tubes and where appropriate of intermediate compartments and / or of another fluid box, characterized in that the first and third fifth compartments are interconnected by an internal channel of the fluid box to be supplied by the same fluid inlet pipe, said channel being limited by a wall adjacent to the second compartment and where appropriate to said intermediate compartments.
Dans le cas où les parois extérieures de la boîte à fluide, lesdites cloisons et ladite paroi du canal sont définies par une pièce moulée, l'une desdites parois extérieures présente avantageusement, dans le prolongement du canal, une ouverture de démoulage qui peut être obturée par un bouchon.In the case where the outer walls of the fluid box, said partitions and said channel wall are defined by a molded part, one of said outer walls advantageously has, in the extension of the channel, a demolding opening which can be closed. by a plug.
Les caractéristiques et avantages de l'invention seront exposés plus en détail dans la description ci-après, en se référant aux dessins annexés, sur lesquels :
- la figure 1 est une vue schématique d'un échangeur de chaleur multiple connu, et a déjà été décrite plus haut;
- la figure 2 est une vue analogue à la figure 1, relative à un échangeur de chaleur selon l'invention; et
- la figure 3 est une vue partielle en coupe d'un autre échangeur de chaleur selon l'invention.
- Figure 1 is a schematic view of a known multiple heat exchanger, and has already been described above;
- Figure 2 is a view similar to Figure 1, relating to a heat exchanger according to the invention; and
- Figure 3 is a partial sectional view of another heat exchanger according to the invention.
A la figure 2, les mêmes numéros de référence sont utilisés qu'à la figure 1 pour désigner des éléments identiques ou analogues. La portion de l'échangeur de chaleur utilisée par le circuit de refroidissement du moteur thermique, comprenant la tubulure d'entrée 7 et le compartiment 4 de la boîte à fluide 1, un premier sous-ensemble des tubes 3, le compartiment 9 et la tubulure de sortie 12 de la boîte à fluide 2, est inchangée par rapport à la figure 1. En revanche, la portion utilisée par le circuit de refroidissement de l'air de suralimentation, dont la configuration interne est la même qu'à la figure 1, est orientée de façon différente. Le compartiment 6 est situé entre les compartiments 4 et 5, et le compartiment 11 entre les compartiments 9 et 10. Il en résulte que les tube de circulation du second circuit les plus proches des tubes de circulation du premier circuit sont ceux reliant les compartiments 6 et 11. Le fluide circulant dans ces tubes, déjà refroidi par deux passes (du compartiment 5 au compartiment 10 et de ce dernier au compartiment 6), est par exemple à une température de 45°C, réduisant à 25°C l'écart de température avec les tubes du premier sous-ensemble quand il n'y circule pas de fluide, et limitant ainsi considérablement les contraintes produites par la dilatation différentielle.In FIG. 2, the same reference numbers are used as in FIG. 1 to designate identical or analogous elements. The portion of the heat exchanger used by the cooling circuit of the heat engine, comprising the
Lorsque les deux circuits sont alimentés, et en reprenant les exemples chiffrés ci-dessus, le fluide circulant entre les compartiments 4 et 9 est à 90°C et celui circulant entre les compartiments 6 et 11 est à 45°, soit une différence de température de 45°C, alors que dans la disposition de la figure 1 le fluide circulant dans les deux sous-ensembles de tubes voisins, entre les compartiments 4 et 9 et entre les compartiments 5 et 10, était à la même température de 90°C. La disposition selon l'invention crée donc dans ce cas une dilatation différentielle qui n'existait pas dans l'état de la technique. Cependant, le résultat important est que la différence de température maximale, dans l'ensemble des phases de fonctionnement, entre des tubes voisins appartenant aux deux circuits est sensiblement plus faible (45°C) dans la configuration selon l'invention que dans la configuration connue (70°C).When the two circuits are supplied, and using the examples given above, the fluid circulating between
Les mêmes numéros de référence sont de nouveau utilisés à la figure 3 qu'à la figure 2. La boîte à fluide 2 et le faisceau de tubes 3 de la figure 3 sont identiques aux éléments correspondants de la figure 2. La boîte à fluide 1 de la figure 3 diffère de celle de la figure 2 en ce que les compartiments 4 et 5, qui sont séparés l'un de l'autre par le compartiment 6 au contact de la plaque perforée ou collecteur 14 traversé par les tubes 3, sont reliés entre eux par un canal 15 à distance du collecteur, ce canal étant séparé du compartiment 6 par une paroi 16 s'étendant dans la direction longitudinale de la boîte à fluide. Le canal 15 permet d'alimenter les compartiments 4 et 5 à partir de la même tubulure d'entrée 7, la tubulure 8 étant supprimée, ce qui simplifie l'ensemble du circuit de refroidissement.The same reference numbers are again used in FIG. 3 as in FIG. 2. The
La boîte à fluide 1 est formée par l'assemblage du collecteur 14 et d'une pièce moulée en matière plastique définissant les parois extérieures, la tubulure 7, les cloisons entre les compartiments et la paroi 16. Lors du moulage de cette pièce, un noyau est présent dans le canal 15. Lors du démoulage, ce noyau est extrait par un mouvement dans la direction longitudinale de la boîte à fluide, en laissant une ouverture 17 dans une paroi d'extrémité 18 de la boîte à fluide. Cette ouverture doit ensuite être obturée au moyen d'un bouchon 19, par exemple par soudage.The
Dans les modes de réalisation décrits, les tubulures d'entrée des deux circuits sont sur la première boîte à fluide et les tubulures de sortie des deux circuits sont sur la seconde boîte à fluide. En variante, les deux tubulures d'entrée, et/ou les deux tubulures de sortie, peuvent être placées sur les deux boîtes à fluide respectivement. De même, les tubulures d'entrée et de sortie d'un même circuit peuvent se trouver sur la même boîte à fluide. La seconde boîte à fluide peut être supprimée totalement ou partiellement, les tubes rectilignes correspondants étant remplacés deux à deux, de façon connue, par des tubes en U ou en épingle à cheveux. L'échangeur de chaleur selon l'invention peut être utilisé, outre les premier et second circuits, pour d'autres circuits.In the embodiments described, the inlet pipes of the two circuits are on the first fluid box and the outlet pipes of the two circuits are on the second fluid box. Alternatively, the two inlet pipes, and / or the two outlet pipes, can be placed on the two fluid boxes respectively. Likewise, the inlet and outlet pipes of the same circuit can be on the same fluid box. The second fluid box can be eliminated entirely or partially, the corresponding rectilinear tubes being replaced two by two, in known manner, by U-shaped or hairpin tubes. The heat exchanger according to the invention can be used, in addition to the first and second circuits, for other circuits.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR9414040 | 1994-11-23 | ||
FR9414040A FR2727197B1 (en) | 1994-11-23 | 1994-11-23 | COOLING PROCESS AND TWO-CIRCUIT HEAT EXCHANGER |
Publications (1)
Publication Number | Publication Date |
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EP0714009A1 true EP0714009A1 (en) | 1996-05-29 |
Family
ID=9469076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95117972A Ceased EP0714009A1 (en) | 1994-11-23 | 1995-11-15 | Method of cooling and heat exchanger with two circuits |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0714009A1 (en) |
BR (1) | BR9505260A (en) |
FR (1) | FR2727197B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2753782A1 (en) * | 1996-09-23 | 1998-03-27 | Valeo Thermique Moteur Sa | Condenser with integral reservoir, especially for automobile air-conditioner |
DE10158436A1 (en) * | 2001-11-29 | 2003-06-12 | Behr Gmbh & Co | heat exchangers |
US20090084364A1 (en) * | 2005-05-31 | 2009-04-02 | Carlos Martins | Intake Air Cooler For Dual-State Turbocharging Turbocompressed Heat Engine And Corresponding Air Circuit |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB667167A (en) * | 1948-02-05 | 1952-02-27 | Commentry Fourchambault Et Dec | Improvements in heat exchangers |
EP0352158A1 (en) * | 1988-07-20 | 1990-01-24 | Valeo Thermique Moteur | Heat exchange apparatus for a plurality of coding-circuits using the same heat-exchange medium |
US5203407A (en) * | 1990-11-07 | 1993-04-20 | Zexel Corporation | Vehicle-loaded parallel flow type heat exchanger |
US5228315A (en) * | 1990-12-28 | 1993-07-20 | Zexel Corporation | Condenser having a receiver tank formed integrally therewith |
-
1994
- 1994-11-23 FR FR9414040A patent/FR2727197B1/en not_active Expired - Lifetime
-
1995
- 1995-11-15 EP EP95117972A patent/EP0714009A1/en not_active Ceased
- 1995-11-22 BR BR9505260A patent/BR9505260A/en active Search and Examination
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB667167A (en) * | 1948-02-05 | 1952-02-27 | Commentry Fourchambault Et Dec | Improvements in heat exchangers |
EP0352158A1 (en) * | 1988-07-20 | 1990-01-24 | Valeo Thermique Moteur | Heat exchange apparatus for a plurality of coding-circuits using the same heat-exchange medium |
FR2634546A1 (en) | 1988-07-20 | 1990-01-26 | Valeo | HEAT EXCHANGER DEVICE FOR MULTIPLE COOLING CIRCUITS USING THE SAME HEAT FLUID |
US5203407A (en) * | 1990-11-07 | 1993-04-20 | Zexel Corporation | Vehicle-loaded parallel flow type heat exchanger |
US5228315A (en) * | 1990-12-28 | 1993-07-20 | Zexel Corporation | Condenser having a receiver tank formed integrally therewith |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2753782A1 (en) * | 1996-09-23 | 1998-03-27 | Valeo Thermique Moteur Sa | Condenser with integral reservoir, especially for automobile air-conditioner |
DE10158436A1 (en) * | 2001-11-29 | 2003-06-12 | Behr Gmbh & Co | heat exchangers |
US20090084364A1 (en) * | 2005-05-31 | 2009-04-02 | Carlos Martins | Intake Air Cooler For Dual-State Turbocharging Turbocompressed Heat Engine And Corresponding Air Circuit |
US8186159B2 (en) * | 2005-05-31 | 2012-05-29 | Valeo Systemes Thermiques | Intake air cooler for dual-state turbocharging turbocompressed heat engine and corresponding air circuit |
Also Published As
Publication number | Publication date |
---|---|
FR2727197A1 (en) | 1996-05-24 |
BR9505260A (en) | 1997-09-16 |
FR2727197B1 (en) | 1997-01-10 |
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