EP2469210B1 - Heat exchanger with stacked plates - Google Patents
Heat exchanger with stacked plates Download PDFInfo
- Publication number
- EP2469210B1 EP2469210B1 EP11194398.1A EP11194398A EP2469210B1 EP 2469210 B1 EP2469210 B1 EP 2469210B1 EP 11194398 A EP11194398 A EP 11194398A EP 2469210 B1 EP2469210 B1 EP 2469210B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plates
- fluid
- cooled
- exchanger
- flow
- 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.)
- Not-in-force
Links
- 239000012530 fluid Substances 0.000 claims description 27
- 238000000926 separation method Methods 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 5
- 239000002826 coolant Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 39
- 239000003507 refrigerant Substances 0.000 description 9
- 230000004907 flux Effects 0.000 description 8
- 238000003466 welding Methods 0.000 description 3
- 235000021183 entrée Nutrition 0.000 description 2
- 101150059401 EGR2 gene Proteins 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
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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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
- F28D7/1692—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section with particular pattern of flow of the heat exchange media, e.g. change of flow direction
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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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
-
- 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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- 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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
- F28D9/0056—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates
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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
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
- F28F1/424—Means comprising outside portions integral with inside portions
- F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
-
- 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
-
- 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
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
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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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
Definitions
- the present invention relates to a stacked plate heat exchanger.
- the invention is particularly applicable to any type of heat exchanger mounted in the compartment of an engine, in particular to the exhaust gas recirculation exchangers of an engine (Exhaust Gas Recirculation Coolers or EGRC).
- exhaust gas recirculation Coolers Exhaust Gas Recirculation Coolers or EGRC.
- EGR exchangers on the market is a metal heat exchanger typically made of stainless steel or aluminum.
- EGR heat exchanger There are essentially two types of EGR heat exchanger: a first type is composed of a carcass inside which is arranged a bundle of tubes for the passage of gases, the refrigerant flowing in the carcass outside the tubes, and the second type has a series of parallel plates forming the heat exchange surfaces, the exhaust gas and the refrigerant circulating between two plates, in alternating layers, fins that can be provided to improve the exchange of heat. heat.
- the loop of the recirculation system further comprises an EGR valve regulating the passage of exhaust gases through the heat exchanger.
- Stacked plate heat exchangers are known in which each plate has a longitudinal closing side wall, each pair of plates being mounted with its respective lateral walls arranged at the longitudinal ends to ensure the separation and closure of the gas and fluid circuits. refrigerant.
- Each circuit may also be of the "I" shaped linear type, where the fluid inlet and the fluid outlet are disposed at opposite ends; or it may be of the U-shaped type, where the fluid inlet and the fluid outlet occupy adjacent positions at the same open end, the opposite end being closed, and defining a forward passage and a passage back through the channels of the plates.
- the closed end for the return of the fluid is generally constituted by a closed reservoir.
- EGR exchanger components are metallic so that the exchangers are assembled by mechanical means before being welded or arc or laser welded to provide an adequate level of sealing for the intended application.
- the EGR exchanger may also include components made of plastic, which may perform a single function or several functions as a single part.
- EGR exchangers The main function of EGR exchangers is the exchange of heat between the exhaust gas and the refrigerant for the purpose of cooling the gases.
- the EGR exchangers must also fulfill other secondary functions, including assembly with the engine block, connection with the refrigerant or connection with the exhaust gas circuit.
- JP-A-2010112201 discloses a stacked plate heat exchanger according to the preamble of claim 1.
- the subject of the present invention is a stacked plate heat exchanger designed to overcome the drawbacks of heat exchangers known in the art, making it possible to reduce or even eliminate the proportion of the inlet flow of the fluid to be cooled which does not enter the heat exchanger. exchanger and is introduced directly into the output stream of the fluid to be cooled in the "U" configuration exchangers.
- the stacked plate heat exchanger, object of the present invention comprises the features of claim 1.
- the separation means make it possible to integrate the closure function between the inlet flow and the outlet flow of the fluid to be cooled, if although they act as a separation barrier between the inlet flow and the outlet flow of the fluid to be cooled and furthermore avoid, as far as possible, the risk of diverting the flow between said inlet and said outlet.
- the separation means comprise a barrier wall coupled to the outer face of the fixing flange, said wall being capable of dividing the inlet and outlet zone of the fluid to be cooled at said open end of the plate assembly. stacked. Said wall must be adapted to the design of the plates in each configuration.
- said separating wall is capable of coming into direct contact with a shutter or valve of an EGR valve to close the inlet flow and the outlet flow of the fluid to be cooled through the exchanger.
- Said wall being integrated in the outer part of the flange, it also plays the role of interface between the exchanger and the valve or the EGR pipe.
- said wall may be an independent piece coupled to the flange or is manufactured as a single piece integrated into the flange.
- the configuration of the flange can also vary depending on the configuration of the EGR exchanger.
- the heat exchanger 1 EGR comprises a plurality of stacked plates 2 between which the gas to be cooled and the refrigerant fluid circulate between two independent circuits defined by said plates 2, in alternating layers.
- Each plate 2 has a longitudinal longitudinal closing wall 3, as shown by the Figures 1 and 2 each pair of plates 2 being mounted with their respective side walls 3 disposed in the longitudinal ends for separation and closure of the circuits.
- the exchanger 1 also comprises a carcass 4 intended to receive the set of stacked plates 2, as shown by the Figures 3 and 4 as well as a fastening flange 5 coupled in said open end and a gas reservoir 6 in said closed end.
- the configuration of the flange 5 may also vary depending on the configuration of the exchanger 1.
- the circuit of the gas to be cooled has a configuration in "U" where the inlet and the outlet of the gases occupy adjacent positions at the same open end of the set of stacked plates 2, the end opposite being closed, and said plates defining forward channels and return channels.
- the exchanger 1 also comprises a wall 7 forming a barrier for separating the inlet flow and the gas outlet stream, said wall 7 being integrated with the fixing flange 5.
- Said wall 7 can also be an independent part coupled to the flange 5 or be manufactured as a single piece integrated flange 5.
- the stacked plate EGR exchangers may have two possible “U” configurations, namely horizontal or vertical, as will be explained later.
- FIGS 1 to 4 show a first embodiment of the invention in which the exchanger 1 is of the type of "U" vertical configuration, that is, the gas flow is directed through all the channels of the gas circuit of the half of the plates 2, and returns through other channels of the gas circuit belonging to the rest of the plates 2 completely separate.
- the separating wall 7 is integrated in the flange 5 in a substantially horizontal position and welded in the oven to an intermediate plate 2a for separating the inlet flow and the gas outlet flow.
- the separating wall 7 makes it possible to integrate the closure function between the inlet flow and the gas outlet flow, so that it acts as a separating barrier between the inlet flow and the flow the gas outlet and further avoids as far as possible the risk of diverting the flow between said inlet and said outlet.
- white arrows illustrate the direction of the input flow and the gas output flow and a black arrow illustrates the possible diversion between said flows.
- Said separating wall 7 is coupled to the external face of the fastening flange 5, said wall 7 being capable of dividing the inlet and outlet gas zone at said open end of the set of stacked plates 2.
- Said wall 7 must be adapted to the design of the plates 2 in each configuration.
- Said separating wall 7 is also capable of coming into direct contact with a shutter or valve of an EGR valve (not shown) to close the inlet flow and the gas outlet flow through the exchanger 1.
- Said wall 7 being integrated in the outer part of the flange 5, it also plays the role of interface between the exchanger 1 and the valve or the EGR pipe.
- FIGS 5 to 9 illustrate a second embodiment of the invention in which the exchanger 1 'is of the type of horizontal "U" configuration, in other words the flow of the gases is directed through half of the channels of all the plates 2, and returns through the other half of the channels of the gas circuit belonging to the same plates 2.
- the partition wall 7 is integrated in a substantially vertical position and welded in the oven to the plates 2 in an intermediate position for separating the inlet flow and the gas outlet flow.
- the separating wall 7 comprises housings 8 that can be nested in the ends of the plates 2, as illustrated by FIG. figure 7 .
- this interlocking junction makes it possible to reduce as much as possible the risk of possible internal diversion, and thus to improve the heat efficiency of the exchanger 1.
- the wall 7 is also in direct contact with the plates 2 due to its welding in the oven with said plates 2, and provided with fins or disruptive elements (not shown) to reduce the risk of diversion possible.
- the carcass 4 furthermore comprises two lateral reservoirs 4a joined to each other, intended to receive the lateral flow of entry and exit of refrigerant into the set of stacked plates 2, as illustrated by FIGS. figures 3 and 8 .
- the exchanger 1 also comprises an inlet well 9 and a refrigerant outlet well 10 disposed on opposite sides of the carcass 4, as illustrated by FIGS. figures 4 and 9 .
- This design of side plates 2 can allow the lateral connection of the coolant wells 9, 10 so as to ensure a distribution of the side coolant in the exchanger 1, which offers many advantages for the integration of a heat exchanger Stacked plate EGR 2 in a small or complex space of the engine block environment.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Description
La présente invention concerne un échangeur de chaleur à plaques empilées.The present invention relates to a stacked plate heat exchanger.
L'invention s'applique tout particulièrement à tout type d'échangeurs de chaleur monté dans le compartiment d'un moteur, notamment à des échangeurs de recirculation des gaz d'échappement d'un moteur (Exhaust Gas Recirculation Coolers ou EGRC).The invention is particularly applicable to any type of heat exchanger mounted in the compartment of an engine, in particular to the exhaust gas recirculation exchangers of an engine (Exhaust Gas Recirculation Coolers or EGRC).
La configuration actuelle des échangeurs EGR sur le marché correspond à un échangeur de chaleur métallique généralement fabriqué en acier inoxydable ou en aluminium.The current configuration of EGR exchangers on the market is a metal heat exchanger typically made of stainless steel or aluminum.
Il existe essentiellement deux types d'échangeurs de chaleur EGR : un premier type est composé d'une carcasse à l'intérieur de laquelle est disposé un faisceau de tubes pour le passage des gaz, le réfrigérant circulant dans la carcasse à l'extérieur des tubes, et le second type compte une série de plaques parallèles formant les surfaces d'échange de chaleur, les gaz d'échappement et le réfrigérant circulant alors entre deux plaques, en couches alternées, des ailettes pouvant être prévues pour améliorer l'échange de chaleur.There are essentially two types of EGR heat exchanger: a first type is composed of a carcass inside which is arranged a bundle of tubes for the passage of gases, the refrigerant flowing in the carcass outside the tubes, and the second type has a series of parallel plates forming the heat exchange surfaces, the exhaust gas and the refrigerant circulating between two plates, in alternating layers, fins that can be provided to improve the exchange of heat. heat.
La boucle du système de recirculation comprend en outre une soupape EGR régulant le passage des gaz d'échappement à travers l'échangeur de chaleur.The loop of the recirculation system further comprises an EGR valve regulating the passage of exhaust gases through the heat exchanger.
On connaît des échangeurs de chaleur à plaques empilées dans lesquels chaque plaque comporte une paroi latérale longitudinale de fermeture, chaque paire de plaques étant montée avec ses parois latérales respectives disposées aux extrémités longitudinales pour assurer la séparation et la fermeture des circuits des gaz et du fluide réfrigérant.Stacked plate heat exchangers are known in which each plate has a longitudinal closing side wall, each pair of plates being mounted with its respective lateral walls arranged at the longitudinal ends to ensure the separation and closure of the gas and fluid circuits. refrigerant.
Chaque circuit peut également être du type linéaire, dit en forme de "I", où l'entrée et la sortie de fluide sont disposées à des extrémités opposées ; ou bien il peut être du type en forme de "U", où l'entrée et la sortie de fluide occupent des positions adjacentes au niveau d'une même extrémité ouverte, l'extrémité opposée étant fermée, et définissant un passage aller et un passage retour à travers les canaux des plaques. Dans ce dernier cas, l'extrémité fermée pour le retour du fluide est généralement constituée d'un réservoir fermé.Each circuit may also be of the "I" shaped linear type, where the fluid inlet and the fluid outlet are disposed at opposite ends; or it may be of the U-shaped type, where the fluid inlet and the fluid outlet occupy adjacent positions at the same open end, the opposite end being closed, and defining a forward passage and a passage back through the channels of the plates. In the latter case, the closed end for the return of the fluid is generally constituted by a closed reservoir.
Les échangeurs de chaleur EGR à plaques empilées peuvent présenter deux configurations en "U" possibles :
- a) Une configuration en "U" verticale : le flux de gaz est dirigé à travers la totalité des canaux du circuit de gaz de la moitié des plaques, et revient par d'autres canaux du circuit de gaz appartenant au reste des plaques complètement distinctes.
- b) Une configuration en "U" horizontale : le flux de gaz est dirigé à travers la moitié des canaux de la totalité des plaques, et revient par l'autre moitié des canaux du circuit de gaz appartenant aux mêmes plaques.
- a) A vertical "U" configuration: the gas flow is directed through all channels of the gas circuit of half of the plates, and returns through other channels of the gas circuit belonging to the remainder of the completely separate plates .
- b) A horizontal "U" configuration: the gas flow is directed through half of the channels of all the plates, and returns through the other half of the channels of the gas circuit belonging to the same plates.
La majorité des composants des échangeurs EGR sont métalliques de sorte que les échangeurs sont assemblés par des moyens mécaniques avant d'être soudés au four ou soudés à l'arc ou au laser pour assurer un niveau d'étanchéité adéquat pour l'application envisagée.The majority of the EGR exchanger components are metallic so that the exchangers are assembled by mechanical means before being welded or arc or laser welded to provide an adequate level of sealing for the intended application.
Dans certains cas, l'échangeur EGR peut également comporter des composants fabriqués en plastique, lesquels peuvent remplir une fonction unique ou plusieurs fonctions sous forme d'une pièce unique.In some cases, the EGR exchanger may also include components made of plastic, which may perform a single function or several functions as a single part.
Les échangeurs EGR ont pour fonction principale l'échange de chaleur entre les gaz d'échappement et le fluide réfrigérant dans le but de refroidir les gaz. Les échangeurs EGR doivent également remplir d'autres fonctions secondaires, notamment l'assemblage avec le bloc moteur, le raccord avec le fluide réfrigérant ou le raccord avec le circuit d'échappement des gaz.The main function of EGR exchangers is the exchange of heat between the exhaust gas and the refrigerant for the purpose of cooling the gases. The EGR exchangers must also fulfill other secondary functions, including assembly with the engine block, connection with the refrigerant or connection with the exhaust gas circuit.
Dans tous ces cas, le procédé de fabrication nécessite un nombre élevé de joints de soudure au four ou de soudure à l'arc ou au laser, d'où une opération complexe et coûteuse.In all these cases, the manufacturing process requires a large number of oven-welding seams or arc or laser welding, resulting in a complex and expensive operation.
Dans les échangeurs de chaleur à plaques empilées, il est nécessaire de fermer deux circuits distincts : le fluide chaud et le fluide froid. Ce type d'échangeurs de chaleur est habituellement fabriqué par soudure au four.In stacked plate heat exchangers, it is necessary to close two separate circuits: the hot fluid and the cold fluid. This type of heat exchanger is usually made by baking.
Dans le but d'éviter les chutes de pression importantes, les fluides pénètrent directement dans l'échangeur de chaleur. L'utilisation de tuyauterie étant impossible, les solutions usuelles consistent à recourir à des réservoirs ou à des accessoires permettant d'introduire le fluide dans l'échangeur de chaleur.In order to avoid significant pressure drops, the fluids enter the heat exchanger directly. The use of piping being impossible, the usual solutions are to use tanks or accessories to introduce the fluid into the heat exchanger.
L'assemblage et la soudure au four de ce type d'interfaces avec les plaques empilées pouvant occasionner des problèmes de qualité, autrement dit des fuites, les deux circuits - celui du fluide réfrigérant et celui des gaz - doivent donc être fermés de manière adéquate afin d'éviter les fuites éventuelles.The assembly and the baking of this type of interfaces with the stacked plates can cause problems of quality, in other words leaks, the two circuits - refrigerant and gas - must therefore be adequately closed to prevent possible leakage.
Du point de vue global de l'efficacité, il est très important, dans les configurations en "U", que le flux de gaz chaud ne se mélange pas au flux de gaz froid. Il est donc bien évident que le flux d'entrée de gaz ne devra jamais rejoindre directement le flux de sortie de gaz.From the overall point of view of efficiency, it is very important, in "U" configurations, that the flow of hot gas does not mix with the flow of cold gas. It is therefore obvious that the gas inlet flow should never directly reach the gas outlet flow.
Du fait de la tendance sur le marché à une réduction des dimensions des moteurs, et à la mise en oeuvre des échangeurs de chaleur EGR non seulement dans les applications à haute pression (HP) mais aussi dans celles à basse pression (LP), l'espace disponible pour l'échangeur et ses composants ne cesse de diminuer. Les environnements dans lesquels l'échangeur EGR doit être intégré sont de plus en plus complexes. Il est donc important de mettre au point des échangeurs EGR compacts pourvus de parties intégrées susceptibles d'être reçues dans l'espace disponibleBecause of the market trend of reduced engine size and the use of EGR heat exchangers not only in high pressure (HP) applications but also in low pressure (LP) applications, the Available space for the exchanger and its components continues to decrease. The environments in which the EGR exchanger must be integrated are becoming more complex. It is therefore important to develop compact EGR exchangers with integrated parts that can be accommodated in the available space
La présente invention a pour objet un échangeur de chaleur à plaques empilées visant à remédier aux inconvénients des échangeurs connus dans la technique, permettant de réduire voire d'éliminer la proportion de flux d'entrée du fluide à refroidir qui ne pénètre pas dans l'échangeur et s'introduit directement dans le flux de sortie du fluide à refroidir dans les échangeurs à configuration en "U".The subject of the present invention is a stacked plate heat exchanger designed to overcome the drawbacks of heat exchangers known in the art, making it possible to reduce or even eliminate the proportion of the inlet flow of the fluid to be cooled which does not enter the heat exchanger. exchanger and is introduced directly into the output stream of the fluid to be cooled in the "U" configuration exchangers.
L'échangeur de chaleur à plaques empilées, objet de la présente invention, comprend les caractéristiques selon la revendication 1.The stacked plate heat exchanger, object of the present invention, comprises the features of
De cette façon, les moyens de séparation permettent d'intégrer la fonction de fermeture entre le flux d'entrée et le flux de sortie du fluide à refroidir, si bien qu'ils jouent le rôle de barrière séparatrice entre le flux d'entrée et le flux de sortie du fluide à refroidir et évitent en outre dans la mesure du possible le risque d'un détournement du flux entre ladite entrée et ladite sortie.In this way, the separation means make it possible to integrate the closure function between the inlet flow and the outlet flow of the fluid to be cooled, if although they act as a separation barrier between the inlet flow and the outlet flow of the fluid to be cooled and furthermore avoid, as far as possible, the risk of diverting the flow between said inlet and said outlet.
Les moyens de séparation comprennent une paroi formant barrière accouplée à la face externe de la bride de fixation, ladite paroi étant susceptible de diviser la zone d'entrée et de sortie du fluide à refroidir au niveau de ladite extrémité ouverte de l'ensemble de plaques empilées. Ladite paroi doit donc être adaptée à la conception des plaques dans chaque configuration.The separation means comprise a barrier wall coupled to the outer face of the fixing flange, said wall being capable of dividing the inlet and outlet zone of the fluid to be cooled at said open end of the plate assembly. stacked. Said wall must be adapted to the design of the plates in each configuration.
Avantageusement également, ladite paroi séparatrice est susceptible d'entrer au contact direct d'un obturateur ou clapet d'une soupape EGR pour fermer le flux d'entrée et le flux de sortie du fluide à refroidir à travers l'échangeur.Advantageously also, said separating wall is capable of coming into direct contact with a shutter or valve of an EGR valve to close the inlet flow and the outlet flow of the fluid to be cooled through the exchanger.
Ladite paroi étant intégrée dans la partie externe de la bride, elle joue donc aussi le rôle d'interface entre l'échangeur et la soupape ou la tuyauterie EGR.Said wall being integrated in the outer part of the flange, it also plays the role of interface between the exchanger and the valve or the EGR pipe.
De préférence, ladite paroi peut être une pièce indépendante accouplée à la bride ou bien est fabriquée sous forme d'une pièce unique intégrée à la bride. La configuration de la bride peut tout autant varier en fonction de la configuration de l'échangeur EGR.Preferably, said wall may be an independent piece coupled to the flange or is manufactured as a single piece integrated into the flange. The configuration of the flange can also vary depending on the configuration of the EGR exchanger.
Dans le but de faciliter la description de ce qui a été exposé précédemment, on joint des dessins dans lesquels sont représentés, sous forme schématique et uniquement à titre d'exemple non limitatif, deux cas pratiques de réalisation de l'échangeur de chaleur à plaques empilées de l'invention. Dans ces dessins :
- la
figure 1 est une vue en perspective de l'ensemble de plaques empilées montrant la paroi séparatrice intégrée à la bride, pour un échangeur de chaleur EGR de configuration en "U" verticale, selon un premier mode de réalisation de l'invention ; - la
figure 2 est une vue en perspective de l'ensemble de plaques empilées selon lafigure 1 , montrant le flux d'entrée et le flux de sortie de gaz et le détournement éventuel entre lesdits flux ; - la
figure 3 est une vue en perspective de l'échangeur de chaleur monté, selon lafigure 1 ; - la
figure 4 est une vue de face de l'échangeur de chaleur monté, selon lafigure 1 ; - la
figure 5 est une vue en perspective de l'ensemble de plaques empilées montrant la paroi séparatrice intégrée à la bride, pour un échangeur de chaleur EGR de configuration en "U" horizontale, selon un deuxième mode de réalisation de l'invention ; - la
figure 6 est une vue en perspective de l'ensemble de plaques empilées selon lafigure 5 , montrant le flux d'entrée et le flux de sortie de gaz, et le détournement éventuel entre lesdits flux ; - la
figure 7 est une vue agrandie de la paroi séparatrice montrant les emboîtements de jonction avec les plaques, selon l'échangeur de lafigure 5 ; - la
figure 8 est une vue en perspective de l'échangeur de chaleur monté, selon lafigure 5 ; et - la
figure 9 est une vue de face de l'échangeur de chaleur monté, selon lafigure 5 .
- the
figure 1 is a perspective view of the set of stacked plates showing the separating wall integrated in the flange, for a vertical U-shaped "E" shaped heat exchanger, according to a first embodiment of the invention; - the
figure 2 is a perspective view of the set of plates stacked according to thefigure 1 , showing the input flow and the gas output flow and the eventual diversion between said flows; - the
figure 3 is a perspective view of the mounted heat exchanger, according to thefigure 1 ; - the
figure 4 is a front view of the mounted heat exchanger, according to thefigure 1 ; - the
figure 5 is a perspective view of the set of stacked plates showing the separating wall integrated in the flange, for a horizontal "U" configuration EGR heat exchanger, according to a second embodiment of the invention; - the
figure 6 is a perspective view of the set of plates stacked according to thefigure 5 , showing the inlet flow and the gas outlet flow, and the possible diversion between said flows; - the
figure 7 is an enlarged view of the dividing wall showing the interlocking junctions with the plates, according to the exchanger of thefigure 5 ; - the
figure 8 is a perspective view of the mounted heat exchanger, according to thefigure 5 ; and - the
figure 9 is a front view of the mounted heat exchanger, according to thefigure 5 .
En référence aux
Chaque plaque 2 comporte une paroi latérale longitudinale de fermeture 3, comme le montrent les
L'échangeur 1 comporte également une carcasse 4 destinée à recevoir l'ensemble de plaques empilées 2, comme le montrent les
Dans ce cas, le circuit du gaz à refroidir présente une configuration en "U" où l'entrée et la sortie des gaz occupent des positions adjacentes au niveau d'une même extrémité ouverte de l'ensemble de plaques empilées 2, l'extrémité opposée étant fermée, et lesdites plaques définissant des canaux aller et des canaux retour.In this case, the circuit of the gas to be cooled has a configuration in "U" where the inlet and the outlet of the gases occupy adjacent positions at the same open end of the set of
L'échangeur 1 comprend également une paroi 7 formant barrière permettant la séparation du flux d'entrée et du flux de sortie des gaz, ladite paroi 7 étant intégrée à la bride de fixation 5. Ladite paroi 7 peut également être une pièce indépendante accouplée à la bride 5 ou bien être fabriquée sous forme d'une pièce unique intégrée à la bride 5.The
Les échangeurs EGR à plaques empilées peuvent présenter deux configurations en "U" possibles, à savoir horizontale ou verticale, comme cela va être expliqué dans la suite.The stacked plate EGR exchangers may have two possible "U" configurations, namely horizontal or vertical, as will be explained later.
Les
Dans ce cas, la paroi séparatrice 7 est intégrée à la bride 5 dans une position sensiblement horizontale et soudée au four à une plaque intermédiaire 2a destinée à séparer le flux d'entrée et le flux de sortie des gaz.In this case, the separating
De cette manière, la paroi séparatrice 7 permet d'intégrer la fonction de fermeture entre le flux d'entrée et le flux de sortie des gaz, si bien qu'elle joue le rôle de barrière séparatrice entre le flux d'entrée et le flux de sortie des gaz et évite en outre dans la mesure du possible le risque de détournement du flux entre ladite entrée et ladite sortie.In this way, the separating
À la
Ladite paroi séparatrice 7 est accouplée à la face externe de la bride de fixation 5, ladite paroi 7 étant susceptible de diviser la zone d'entrée et de sortie des gaz au niveau de ladite extrémité ouverte de l'ensemble de plaques empilées 2. Ladite paroi 7 doit donc être adaptée à la conception des plaques 2 dans chaque configuration.Said separating
Ladite paroi séparatrice 7 est en outre susceptible d'entrer au contact direct d'un obturateur ou clapet d'une soupape EGR (non représentée) pour fermer le flux d'entrée et le flux de sortie des gaz à travers l'échangeur 1.Said separating
Ladite paroi 7 étant intégrée dans la partie externe de la bride 5, elle joue donc aussi le rôle d'interface entre l'échangeur 1 et la soupape ou la tuyauterie EGR.Said
Les
Dans ce cas, la paroi séparatrice 7 est intégrée dans une position sensiblement verticale et soudée au four aux plaques 2 dans une position intermédiaire permettant de séparer le flux d'entrée et le flux de sortie des gaz.In this case, the
De la même manière, à la
Par ailleurs, dans ce mode de réalisation de la configuration en "U" horizontale, la paroi séparatrice 7 comprend des logements 8 susceptibles d'être emboîtés dans les extrémités des plaques 2, comme l'illustre la
De cette façon, cette jonction par emboîtement permet de réduire au maximum le risque d'un détournement interne éventuel, et d'améliorer ainsi le rendement thermique de l'échangeur 1. La paroi 7 est aussi au contact direct des plaques 2 du fait de sa soudure au four avec lesdites plaques 2, et pourvue d'ailettes ou d'éléments perturbateurs (non représentés) visant à réduire le risque du détournement éventuel.In this way, this interlocking junction makes it possible to reduce as much as possible the risk of possible internal diversion, and thus to improve the heat efficiency of the
Dans les deux modes de réalisation, la carcasse 4 comporte par ailleurs deux réservoirs latéraux 4a solidarisés entre eux, destinés à recevoir le flux latéral d'entrée et de sortie de fluide réfrigérant dans l'ensemble de plaques empilées 2, comme l'illustrent les
L'échangeur 1 comprend également un puits d'entrée 9 et un puits de sortie 10 du fluide réfrigérant disposés sur des côtés opposés de la carcasse 4, comme l'illustrent les
Cette conception de plaques 2 latérales peut permettre le raccord latéral des puits 9,10 du fluide réfrigérant de façon à assurer une répartition du fluide réfrigérant latéral dans l'échangeur 1, laquelle offre de nombreux avantages pour l'intégration d'un échangeur de chaleur EGR à plaques empilées 2 dans un espace réduit ou complexe de l'environnement du bloc moteur.This design of
Claims (3)
- Heat exchanger (1) with stacked plates, comprising a plurality of stacked plates (2) between which the fluid to be cooled and the coolant fluid circulate between two independent circuits defined by said plates (2), in alternating layers, the circuit of the fluid to be cooled having a "U" configuration, whereby the inlet and the outlet of said fluid to be cooled occupy adjacent positions at one and the same open end of the assembly of stacked plates, the opposite end being closed, and said plates (2) defining outward channels and return channels, and comprising a fastening flange (5) coupled to said open end, said exchanger comprising means (7) of separation of the inlet flow and of the outlet flow of the fluid to be cooled, said separation means (7) being integrated with said fastening flange (5), characterized in that said exchanger is of the type with a horizontal "U" configuration in which the flow of fluid to be cooled is directed via one half of the channels of the totality of the plates (2) and returns via the other half of the channels of the circuit of fluid to be cooled belonging to the same plates (2), in that said separation means comprise a wall (7) forming a barrier coupled to the external face of the fastening flange (5), said wall (7) being capable of dividing the inlet and outlet zone of the fluid to be cooled at said open end of the assembly of stacked plates (2), in that the separating wall (7) is integrated in a substantially vertical position and brazed to the plates (2) in an intermediate position that makes it possible to separate the inlet flow and the outlet flow of the fluid to be cooled, and in that the separating wall (7) comprises slots (8) capable of being engaged with the ends of the plates (2).
- Exchanger (1) according to Claim 1, wherein said separating wall (7) is capable of entering into direct contact with a shutter or flap of an EGR valve in order to close off the inlet flow and the outlet flow of the fluid to be cooled via the exchanger (1).
- Exchanger (1) according to Claim 1 or 2, wherein said wall (7) is an independent component coupled to the flange (5) or, alternatively, is manufactured in the form of a single piece integrated with the flange (5).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201031917A ES2397882B1 (en) | 2010-12-22 | 2010-12-22 | HEAT EXCHANGER OF STACKED PLATES. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2469210A2 EP2469210A2 (en) | 2012-06-27 |
EP2469210A3 EP2469210A3 (en) | 2015-04-15 |
EP2469210B1 true EP2469210B1 (en) | 2018-12-19 |
Family
ID=45440225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11194398.1A Not-in-force EP2469210B1 (en) | 2010-12-22 | 2011-12-19 | Heat exchanger with stacked plates |
Country Status (3)
Country | Link |
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EP (1) | EP2469210B1 (en) |
KR (1) | KR20120071335A (en) |
ES (2) | ES2397882B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3021065A4 (en) * | 2013-07-12 | 2017-04-19 | Cordón Urbiola, Jose, Luis | Heat recovery unit |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10214467A1 (en) * | 2002-03-30 | 2003-10-09 | Modine Mfg Co | Exhaust gas heat exchanger for motor vehicles |
US8544454B2 (en) * | 2006-03-16 | 2013-10-01 | Behr Gmbh & Co. Kg | Heat exchanger for a motor vehicle |
KR101298382B1 (en) * | 2006-07-03 | 2013-08-20 | 모다인 매뉴팩츄어링 컴파니 | Egr cooler |
KR100827329B1 (en) * | 2007-02-28 | 2008-05-06 | 주식회사 코렌스 | Stack type egr cooler |
KR101554048B1 (en) * | 2007-04-13 | 2015-09-17 | 발레오 테르미코 에스.에이. | Heat exchanger for gas and method for making same |
KR100823654B1 (en) * | 2007-10-02 | 2008-04-21 | 주식회사 코렌스 | Exhaust gas recirculation cooler |
KR100890337B1 (en) * | 2007-12-21 | 2009-03-25 | 지엠대우오토앤테크놀로지주식회사 | Cooler of diesel engine exhaust gas recirculation |
JP2010112201A (en) * | 2008-11-04 | 2010-05-20 | Tokyo Radiator Mfg Co Ltd | U-turn type egr cooler |
-
2010
- 2010-12-22 ES ES201031917A patent/ES2397882B1/en not_active Expired - Fee Related
-
2011
- 2011-12-19 ES ES11194398T patent/ES2716524T3/en active Active
- 2011-12-19 EP EP11194398.1A patent/EP2469210B1/en not_active Not-in-force
- 2011-12-20 KR KR1020110138304A patent/KR20120071335A/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
ES2397882B1 (en) | 2013-10-17 |
ES2716524T3 (en) | 2019-06-13 |
EP2469210A3 (en) | 2015-04-15 |
EP2469210A2 (en) | 2012-06-27 |
ES2397882A1 (en) | 2013-03-12 |
KR20120071335A (en) | 2012-07-02 |
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