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WO2007079983A1 - Heat exchanger with stacked plates - Google Patents

Heat exchanger with stacked plates Download PDF

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Publication number
WO2007079983A1
WO2007079983A1 PCT/EP2006/012658 EP2006012658W WO2007079983A1 WO 2007079983 A1 WO2007079983 A1 WO 2007079983A1 EP 2006012658 W EP2006012658 W EP 2006012658W WO 2007079983 A1 WO2007079983 A1 WO 2007079983A1
Authority
WO
WIPO (PCT)
Prior art keywords
exchanger
gas
plates
plate
inlet
Prior art date
Application number
PCT/EP2006/012658
Other languages
French (fr)
Inventor
Maria Teresa Catalan
Carlos Rodrigo
Maria Luisa Miedes
Original Assignee
Valeo Termico S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Termico S.A. filed Critical Valeo Termico S.A.
Publication of WO2007079983A1 publication Critical patent/WO2007079983A1/en

Links

Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
    • F01N3/046—Exhaust manifolds with cooling jacket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0418—Layout of the intake air cooling or coolant circuit the intake air cooler having a bypass or multiple flow paths within the heat exchanger to vary the effective heat transfer surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0462—Liquid cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • 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
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • 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
    • F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/10—Particular pattern of flow of the heat exchange media
    • F28F2250/102—Particular pattern of flow of the heat exchange media with change of flow direction
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a stacked plate heat exchanger of the type comprising a body defining a "U" -shaped path for the circulation of gas with heat exchange with a cooling fluid.
  • the invention is particularly suitable for Exhaust Gas Recirculation Coolers (EGRC) and charge air coolers (CACs).
  • EGRC Exhaust Gas Recirculation Coolers
  • CACs charge air coolers
  • the "U” configuration of EGR type exchangers is often used for integration purposes. This configuration also increases the specific efficiency of the heat exchanger (volumetric efficiency), at the expense of increased pressure loss. This configuration also facilitates the integration of a bypass, the corresponding bypass valve being disposed in the gas inlet region.
  • the "U" shaped flow can be established in a horizontal or vertical direction. In the case of a horizontal direction, the gas enters the exchanger on the left side and leaves it on the right side (or vice versa). This can be done using a tank at the end of the plates, feeding the gas from the left to the right, or using a disruptor with a particular shape.
  • the plates are closed at their end end, the latter preferably having a rounded shape.
  • the disruptor does not reach the final end and thus leaves a space for the "U" return of the gas.
  • the disrupter may comprise independent channels, for example triangular channels, preventing the free flow of gas from the left to the right, or can be shifted (offset disruptor) and have a continuous channel in the center.
  • the gas enters the exchanger from the upper side and emerges from the lower side (or vice versa).
  • the object of the present invention is to overcome the aforementioned drawbacks by developing a U-shaped stacked plate heat exchanger having a vertical configuration and not requiring a gas reservoir to ensure the return of the gas.
  • the stacked plate heat exchanger, in particular for the exhaust gases of an engine, of the present invention is of the type comprising a body defining a "U" -shaped trajectory intended for the circulation of gases with exchange of heat. heat with a cooling fluid, the inlet and outlet of the gases to be cooled are adjacent and arranged one above the other, said body comprising two parallel and independent upper and lower stages, provided with a plurality stacked plates.
  • the heat exchanger is characterized in that the plates are closed by their final end and incorporate in proximity to said final end a through orifice defining the gas return path of the upper plate stage to the lower plate stage , or vice versa, said orifice being closed by an upper plate and a lower plate.
  • each plate advantageously incorporates a disturbing element of the gas flow.
  • each upper and lower plate stage incorporates a disturbing element of different type.
  • each upper and lower plate stage incorporates a different type of cooling fluid circuit.
  • the transverse surface of the orifice is approximately equal to the transverse surface of the gas inlet, so as to avoid a significant increase in the pressure drop.
  • the exchanger further comprises a gas reservoir coupled to the gas inlet and outlet region of the exchanger.
  • the gas reservoir preferably has a substantially orthogonal configuration incorporating an upper orifice allowing the entry of gases in a direction substantially perpendicular to the plates, and a front orifice allowing the exit of gases in a direction substantially parallel to the plates.
  • the heat exchanger incorporates a bypass valve allowing the opening or closing of the gas passage to the exchanger.
  • bypass valve is also integrated into the actual gas tank of the exchanger.
  • the bypass valve is a butterfly valve.
  • the bypass valve preferably comprises a plate hinged about an axis located in the center of the inlet and outlet regions of the upper and lower plate stages, so that when the valve is open, the plate occupies a position parallel to the plates thus allowing the entry and exit of the gases, and, when the valve is closed, the plate occupies an inclined position for closing the inlet and outlet ports of the gas tank.
  • FIGS. 1 is a longitudinal sectional view of the "U" heat exchanger in the vertical direction
  • Figure 2 is a perspective view of the exchanger of Figure 1, the upper plate being omitted to show the gas return port
  • FIG. 3 is a perspective view of the heat exchanger comprising two different cooling circuits, according to another embodiment of the invention.
  • the stacked plate heat exchanger 1 in particular for the exhaust gases of an engine, comprises a body 2 defining a "U" -shaped trajectory intended for the circulation of gas with heat exchange with a cooling fluid, the inlet 3 and the outlet 4 of the gases to be cooled are adjacent and arranged one above the other, said body 2 comprising two upper stages 2a and lower 2b parallel and independent, provided with a plurality of stacked plates 5.
  • the plates 5 are closed by their final end 6 and incorporate near said end 6 a through hole 7 defining the gas return path of the upper plate stage 2a to the lower plate stage 2b, said orifice 7 being closed by an upper plate 8 and a lower plate 9.
  • the upper plate 8 has been omitted from FIG. 2 so as to show the appropriate configuration of the orifice 7 which must allow the return of the gas from the upper plate stage 2a to the lower plate stage 2b while minimizing the gas pressure drop.
  • Each plate 5 further incorporates a disturbing element (not shown for the sake of clarity) of the gas flow. The disturbing elements do not reach the final end 6 of the plates 5 so as to allow the return of the gas through the orifice 7.
  • the exchanger 1 is coupled in the region of FIG.
  • the gas tank 10 comprises an upper orifice 3 allowing the gases to enter in a direction substantially perpendicular to the plates 5. and a front orifice 4 allowing the gas to exit in a direction substantially parallel to the plates 5.
  • the inlet 3 may be parallel to the plates 5 and the outlet 4 may be perpendicular thereto; alternatively, the inlet 3 and outlet 4 may both be parallel or both perpendicular to the plates 5.
  • the exchanger 1 also comprises a bypass valve 11 integrated in the gas tank 10 proper and allowing the opening and closing of the gas passage to the exchanger 1.
  • the bypass valve is of the butterfly type, and comprises a plate 11 hinged about an axis situated at the center of the inlet and outlet regions. output of the upper plate stages 2a and lower 2b respective.
  • the plate 11 occupies a position parallel to the plates 5 thus allowing the entry and exit of gases; and when the valve is closed, the plate 11 occupies an inclined position making it possible to plug the inlet and outlet ports 4 of the gas tank 10 thus putting in communication the inlet 3 and the outlet 4 to perform the function by - Proper pass through which the gas passes directly into the exhaust pipe without being cooled by the exchanger.
  • the exchanger operates as follows: With the valve 11 open, the gas enters the heat exchanger 1 in the direction of the upper plate stage 2a through the respective disturbing elements and reaches the final end
  • the arrows shown in FIG. 1 indicate the direction of the flow of gas through the exchanger 1.
  • the design of the plates 5 provided with the orifice 7 makes it possible to avoid having to use a traditional gas reservoir, which often constitutes a complex and relatively expensive piece of work in exchangers with a large number of plates.
  • the design of the plates 5 is also very versatile, insofar as the same plate 5 can be used in exchangers with different numbers of plates, only the connecting parts to the inlet and outlet region of the exchanger in front of then be modified.
  • This type of plate 5 allows a very simple manufacturing of asymmetrical "U" -shaped exchangers since only the connecting pieces to the inlet and outlet region of the exchanger must be modified.
  • the configuration of these connecting pieces conditions the number of plates used by the gas to enter the exchanger and out.
  • the number of plates used for the gas inlet may be greater than the number of plates used for its outlet, this number depending conveniently on the increase in density of the gas through the exchanger as it cools. .
  • the configuration of the exchanger 1 of the invention is very versatile, since it can contain two different disturbing elements, one for the plates where the gas is hot, another, more dense, for the plates where the gas is more cold and has a higher density. This therefore increases the efficiency of the exchanger without increasing the volume.
  • the exchanger can incorporate two different cooling circuits. As illustrated in FIG. 3, the exchanger comprises, for each respective cooling circuit, corresponding inlet ducts 12a, 13a and outlet ducts 12b, 13b.
  • the high temperature cooling circuit can cool the plates where the gas is hot, while the low temperature cooling circuit can cool the plates where the gas is cold. This therefore increases the efficiency of the exchanger without increasing the volume.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to a heat exchanger with stacked plates, comprising a body (2) defining a U-shaped path for the circulation of gases with the exchange of heat with a cooling fluid. The inlet (3) and the outlet (4) for the gases to be cooled are adjacently arranged one above the other, and the body (2) comprises two parallel and independent upper (2a) and lower (2b) stages provided with a plurality of stacked plates (5). The invention is characterised in that the plates (5) are closed by the end (6) thereof and incorporate a passage (7), close to said end (6), defining the return path of the gas from the upper plate stage (2a) to the lower plate stage (2b) or vice versa, said passage (7) being closed by an upper plate (8) and a lower plate (9). A heat exchanger produced in this way does not require a gas tank for the return of the gas.

Description

ECHANGEUR DE CHALEUR A PLAQUES EMPILEES HEAT EXCHANGER WITH STACKED PLATES
La présente invention concerne un échangeur de chaleur à plaques empilées, du type comprenant un corps définissant une trajectoire en forme de « U », destiné à la circulation de gaz avec échange de chaleur avec un fluide de refroidissement.The present invention relates to a stacked plate heat exchanger of the type comprising a body defining a "U" -shaped path for the circulation of gas with heat exchange with a cooling fluid.
L' invention convient tout particulièrement aux échangeurs à recirculation de gaz d'échappement d'un moteur (Exhaust Gas Recirculation Coolers ou EGRC) et aux refroidisseurs d'air de suralimentation ou intercoolers (Charge Air Coolers ou CAC) .The invention is particularly suitable for Exhaust Gas Recirculation Coolers (EGRC) and charge air coolers (CACs).
ARRIERE-PLAN DE L' INVENTIONBACKGROUND OF THE INVENTION
La configuration en « U » des échangeurs du type EGR est souvent utilisée à des fins d'intégration. Cette configuration accroît en outre le rendement spécifique de l' échangeur de chaleur (efficacité volumétrique) , aux dépens toutefois d'une perte de pression accrue. Cette configuration facilite également l'intégration d'un by-pass, la vanne by-pass correspondante étant disposée dans la région d'entrée du gaz. Dans un échangeur à plaques empilées, le flux en forme de « U » peut être établi dans une direction horizontale ou verticale. Dans le cas d'une direction horizontale, le gaz pénètre dans l' échangeur par le côté gauche et en ressort par le côté droit (ou vice- versa). Ceci peut être réalisé à l'aide d'un réservoir situé à l'extrémité finale des plaques, acheminant le gaz de la gauche vers la droite, ou à l'aide d'un perturbateur présentant une forme particulière. Dans ce cas, les plaques sont fermées à leur l'extrémité finale, celle-ci présentant de préférence une forme arrondie. Le perturbateur n'atteint pas l'extrémité finale et laisse ainsi un espace pour le retour en « U » du gaz. Le perturbateur peut comprendre des canaux indépendants, par exemple des canaux de forme triangulaire, empêchant l'écoulement libre du gaz de la gauche vers la droite, ou peut être décalé (perturbateur offset) et comporter un canal continu au centre .The "U" configuration of EGR type exchangers is often used for integration purposes. This configuration also increases the specific efficiency of the heat exchanger (volumetric efficiency), at the expense of increased pressure loss. This configuration also facilitates the integration of a bypass, the corresponding bypass valve being disposed in the gas inlet region. In a stacked plate heat exchanger, the "U" shaped flow can be established in a horizontal or vertical direction. In the case of a horizontal direction, the gas enters the exchanger on the left side and leaves it on the right side (or vice versa). This can be done using a tank at the end of the plates, feeding the gas from the left to the right, or using a disruptor with a particular shape. In this case, the plates are closed at their end end, the latter preferably having a rounded shape. The disruptor does not reach the final end and thus leaves a space for the "U" return of the gas. The disrupter may comprise independent channels, for example triangular channels, preventing the free flow of gas from the left to the right, or can be shifted (offset disruptor) and have a continuous channel in the center.
Dans le cas d'une direction verticale, le gaz pénètre dans l'échangeur par le côté supérieur et en ressort par le côte inférieur (ou vice-versa) .In the case of a vertical direction, the gas enters the exchanger from the upper side and emerges from the lower side (or vice versa).
Un flux vertical en « U » ne peut toutefois être obtenu qu'à l'aide d'un réservoir acheminant le gaz des plaques supérieures aux plaques inférieures, ou vice- versa.However, a "U" vertical flow can only be obtained by means of a tank conveying the gas from the upper plates to the lower plates, or vice versa.
DESCRIPTION DE L'INVENTIONDESCRIPTION OF THE INVENTION
L'objectif de la présente invention consiste à remédier aux inconvénients susmentionnés en développant un échangeur de chaleur à plaques empilées en forme de « U » présentant une configuration verticale et ne nécessitant pas de réservoir de gaz pour assurer le retour du gaz. L'échangeur de chaleur à plaques empilées, notamment pour les gaz d'échappement d'un moteur, de la présente invention est du type comprenant un corps définissant une trajectoire en forme de « U », destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement, dont l'entrée et la sortie des gaz à refroidir sont adjacentes et disposées l'une au-dessus de l'autre, ledit corps comprenant deux étages supérieur et inférieur parallèles et indépendants, pourvus d'une pluralité de plaques empilées. L'échangeur de chaleur est caractérisé en ce que les plaques sont fermées par leur extrémité finale et incorporent à proximité de ladite extrémité finale un orifice passant définissant la trajectoire de retour du gaz de l'étage de plaques supérieur à l'étage de plaques inférieur, ou vice-versa, ledit orifice étant fermé par une plaque supérieure et une plaque inférieure .The object of the present invention is to overcome the aforementioned drawbacks by developing a U-shaped stacked plate heat exchanger having a vertical configuration and not requiring a gas reservoir to ensure the return of the gas. The stacked plate heat exchanger, in particular for the exhaust gases of an engine, of the present invention is of the type comprising a body defining a "U" -shaped trajectory intended for the circulation of gases with exchange of heat. heat with a cooling fluid, the inlet and outlet of the gases to be cooled are adjacent and arranged one above the other, said body comprising two parallel and independent upper and lower stages, provided with a plurality stacked plates. The heat exchanger is characterized in that the plates are closed by their final end and incorporate in proximity to said final end a through orifice defining the gas return path of the upper plate stage to the lower plate stage , or vice versa, said orifice being closed by an upper plate and a lower plate.
L'on obtient ainsi un échangeur de chaleur à plaques empilées en forme de « U » présentant une configuration verticale, ne nécessitant pas de • réservoir de gaz pour assurer le retour du gaz, ce qui permet d'en réduire le coût et le volume total.This gives a "U" shaped stacked plate heat exchanger with a vertical configuration, which does not require • Gas tank to ensure the return of gas, which reduces the cost and the total volume.
Chaque plaque incorpore avantageusement un élément perturbateur du flux de gaz. Selon un mode de réalisation de la présente invention, chaque étage de plaques supérieur et inférieur incorpore un élément perturbateur de type différent.Each plate advantageously incorporates a disturbing element of the gas flow. According to an embodiment of the present invention, each upper and lower plate stage incorporates a disturbing element of different type.
Selon un autre mode de réalisation de la présente invention, chaque étage de plaques supérieur et inférieur incorpore un circuit de fluide de refroidissement de type différent.According to another embodiment of the present invention, each upper and lower plate stage incorporates a different type of cooling fluid circuit.
Avantageusement, la surface transversale de l'orifice est à peu près égale à la surface transversale de l'entrée de gaz, de façon à éviter une augmentation sensible de la chute de pression.Advantageously, the transverse surface of the orifice is approximately equal to the transverse surface of the gas inlet, so as to avoid a significant increase in the pressure drop.
L'échangeur comprend en outre un réservoir de gaz couplé à la région d'entrée et de sortie des gaz de l' échangeur . Le réservoir de gaz présente de préférence une configuration sensiblement orthogonale incorporant un orifice supérieur permettant l'entrée des gaz selon une direction sensiblement perpendiculaire aux plaques, et un orifice frontal permettant la sortie des gaz selon une direction sensiblement parallèle aux plaques.The exchanger further comprises a gas reservoir coupled to the gas inlet and outlet region of the exchanger. The gas reservoir preferably has a substantially orthogonal configuration incorporating an upper orifice allowing the entry of gases in a direction substantially perpendicular to the plates, and a front orifice allowing the exit of gases in a direction substantially parallel to the plates.
Avantageusement, l'échangeur de chaleur incorpore une vanne by-pass permettant l'ouverture ou la fermeture du passage des gaz vers l'échangeur.Advantageously, the heat exchanger incorporates a bypass valve allowing the opening or closing of the gas passage to the exchanger.
Avantageusement, la vanne by-pass est aussi intégrée au réservoir de gaz proprement dit de l'échangeur.Advantageously, the bypass valve is also integrated into the actual gas tank of the exchanger.
Selon un mode de réalisation de l'invention, la vanne by-pass est une vanne papillon.According to one embodiment of the invention, the bypass valve is a butterfly valve.
Dans ce cas, la vanne by-pass comprend de préférence une plaque articulée autour d'un axe situé au centre des régions d'entrée et de sortie des étages de plaques supérieur et inférieur, de telle sorte que, lorsque la vanne est ouverte, la plaque occupe une position parallèle aux plaques en permettant ainsi l'entrée et la sortie des gaz, et, lorsque la vanne est fermée, la plaque occupe une position inclinée permettant de boucher les orifices d'entrée et de sortie du réservoir de gaz.In this case, the bypass valve preferably comprises a plate hinged about an axis located in the center of the inlet and outlet regions of the upper and lower plate stages, so that when the valve is open, the plate occupies a position parallel to the plates thus allowing the entry and exit of the gases, and, when the valve is closed, the plate occupies an inclined position for closing the inlet and outlet ports of the gas tank.
BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS
Dans le but de faciliter la description de ce qui précède, il est joint des dessins représentant, de façon schématique et uniquement à titre d'exemple non limitatif, un cas pratique de réalisation de l'échangeur de chaleur à plaques empilées de l'invention, dessins dans lesquels : la figure 1 est une vue 'en coupe longitudinale de l'échangeur de chaleur en « U » suivant la direction verticale ; la figure 2 est une vue en perspective de l'échangeur de la figure 1, la plaque supérieure étant omise pour montrer l'orifice de retour de gaz ; et la figure 3 est une vue en perspective de l'échangeur de chaleur comportant deux circuits de refroidissement différents, selon un autre mode de réalisation de l'invention.In order to facilitate the description of the foregoing, drawings illustrating, schematically and solely by way of non-limiting example, a practical example of making the stacked plate heat exchanger of the invention are attached. FIGS. 1 is a longitudinal sectional view of the "U" heat exchanger in the vertical direction; Figure 2 is a perspective view of the exchanger of Figure 1, the upper plate being omitted to show the gas return port; and FIG. 3 is a perspective view of the heat exchanger comprising two different cooling circuits, according to another embodiment of the invention.
DESCRIPTION D'UN MODE DE REALISATION PREFEREDESCRIPTION OF A PREFERRED EMBODIMENT
Comme le montrent les figures 1 et 2, l'échangeur de chaleur 1 à plaques empilées, notamment pour les gaz d'échappement d'un moteur, comprend un corps 2 définissant une trajectoire en forme de « U », destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement, dont l'entrée 3 et la sortie 4 des gaz à refroidir sont adjacentes et disposées l'une au-dessus de l'autre, ledit corps 2 comprenant deux étages supérieur 2a et inférieur 2b parallèles et indépendants, pourvus d'une pluralité de plaques empilées 5.As shown in FIGS. 1 and 2, the stacked plate heat exchanger 1, in particular for the exhaust gases of an engine, comprises a body 2 defining a "U" -shaped trajectory intended for the circulation of gas with heat exchange with a cooling fluid, the inlet 3 and the outlet 4 of the gases to be cooled are adjacent and arranged one above the other, said body 2 comprising two upper stages 2a and lower 2b parallel and independent, provided with a plurality of stacked plates 5.
Les plaques 5 sont fermées par leur extrémité finale 6 et incorporent à proximité de ladite extrémité 6 un orifice passant 7 définissant la trajectoire de retour du gaz de l'étage de plaques supérieur 2a à l'étage de plaques inférieur 2b, ledit orifice 7 étant fermé par une plaque supérieure 8 et une plaque inférieure 9.The plates 5 are closed by their final end 6 and incorporate near said end 6 a through hole 7 defining the gas return path of the upper plate stage 2a to the lower plate stage 2b, said orifice 7 being closed by an upper plate 8 and a lower plate 9.
La plaque supérieure 8 a été omise de la figure 2 de façon à montrer la configuration appropriée de l'orifice 7 qui doit permettre le retour du gaz de l'étage de plaques supérieur 2a à l'étage de plaques inférieur 2b tout en minimisant la chute de pression du gaz. Chaque plaque 5 incorpore en outre un élément perturbateur (non illustré par souci de clarté) du flux de gaz. Les éléments perturbateurs n'atteignent pas l'extrémité finale 6 des plaques 5 de façon à permettre le retour du gaz à travers l'orifice 7. Comme l'illustre également la figure 1, l'échangeur 1 est couplé, dans la région d'entrée et de sortie des gaz, à un réservoir de gaz 10. Selon un mode de réalisation de l'invention, le réservoir de gaz 10 comprend un orifice supérieur 3 permettant l'entrée des gaz selon une direction sensiblement perpendiculaire aux plaques 5, et un orifice frontal 4 permettant la sortie des gaz selon une direction sensiblement parallèle aux plaques 5.The upper plate 8 has been omitted from FIG. 2 so as to show the appropriate configuration of the orifice 7 which must allow the return of the gas from the upper plate stage 2a to the lower plate stage 2b while minimizing the gas pressure drop. Each plate 5 further incorporates a disturbing element (not shown for the sake of clarity) of the gas flow. The disturbing elements do not reach the final end 6 of the plates 5 so as to allow the return of the gas through the orifice 7. As also illustrated in FIG. 1, the exchanger 1 is coupled in the region of FIG. In one embodiment of the invention, the gas tank 10 comprises an upper orifice 3 allowing the gases to enter in a direction substantially perpendicular to the plates 5. and a front orifice 4 allowing the gas to exit in a direction substantially parallel to the plates 5.
Il convient de souligner que d'autres modes de réalisation du réservoir de gaz sont également possibles. A titre d'exemple, et parmi d'autres configurations possibles, l'entrée 3 peut être parallèle aux plaques 5 et la sortie 4 peut être perpendiculaire à celles-ci ; en variante, l'entrée 3 et la sortie 4 peuvent être toutes deux parallèles ou toutes deux perpendiculaires aux plaques 5.It should be emphasized that other embodiments of the gas reservoir are also possible. By way of example, and among other possible configurations, the inlet 3 may be parallel to the plates 5 and the outlet 4 may be perpendicular thereto; alternatively, the inlet 3 and outlet 4 may both be parallel or both perpendicular to the plates 5.
L' échangeur 1 comprend également une vanne by-pass 11 intégrée au réservoir de gaz 10 proprement dit et permettant l'ouverture et la fermeture du passage des gaz vers l'échangeur 1.The exchanger 1 also comprises a bypass valve 11 integrated in the gas tank 10 proper and allowing the opening and closing of the gas passage to the exchanger 1.
Selon un mode de réalisation de l'invention, et comme l'illustre la figure 1, la vanne by-pass est du type papillon, et comprend une plaque 11 articulée autour d'un axe situé au centre des régions d'entrée et de sortie des étages de plaques supérieur 2a et inférieur 2b respectifs. De cette manière, lorsque la vanne est ouverte, la plaque 11 occupe une position parallèle aux plaques 5 en permettant ainsi l'entrée et la sortie des gaz ; et lorsque la vanne est fermée, la plaque 11 occupe une position inclinée permettant de boucher les orifices d'entrée 3 et de sortie 4 du réservoir de gaz 10 en mettant ainsi en communication l'entrée 3 et la sortie 4 pour réaliser la fonction by- pass proprement dite grâce à laquelle les gaz passent directement dans la conduite d'échappement sans être refroidis par l'échangeur.According to one embodiment of the invention, and as illustrated in FIG. 1, the bypass valve is of the butterfly type, and comprises a plate 11 hinged about an axis situated at the center of the inlet and outlet regions. output of the upper plate stages 2a and lower 2b respective. In this way, when the valve is open, the plate 11 occupies a position parallel to the plates 5 thus allowing the entry and exit of gases; and when the valve is closed, the plate 11 occupies an inclined position making it possible to plug the inlet and outlet ports 4 of the gas tank 10 thus putting in communication the inlet 3 and the outlet 4 to perform the function by - Proper pass through which the gas passes directly into the exhaust pipe without being cooled by the exchanger.
L'échangeur fonctionne de la manière suivante : La vanne 11 étant ouverte, le gaz pénètre dans l'échangeur de chaleur 1 en direction de l'étage de plaques supérieur 2a à travers les éléments perturbateurs respectifs et atteint l'extrémité finaleThe exchanger operates as follows: With the valve 11 open, the gas enters the heat exchanger 1 in the direction of the upper plate stage 2a through the respective disturbing elements and reaches the final end
6 des plaques 5 en traversant l'orifice 7. Cet orifice6 plates 5 through the hole 7. This orifice
7 provoque le retour du flux de gaz qui se dirige alors vers l'étage de plaques inférieur 2b en traversant les éléments perturbateurs respectifs, avant de quitter l'échangeur 1 en direction de la conduite de recirculation de gaz.7 causes the return of the flow of gas which then goes to the lower plate stage 2b through the respective disturbing elements, before leaving the heat exchanger 1 in the direction of the gas recirculation pipe.
Les flèches représentées à la figure 1 indiquent la direction du flux de gaz à travers l'échangeur 1. La conception des plaques 5 pourvues de l'orifice 7 permet d'éviter d'avoir à utiliser un réservoir de gaz traditionnel, lequel constitue souvent une pièce de fabrication complexe et relativement coûteuse dans des échangeurs dotés d'un grand nombre de plaques. La conception des plaques 5 est en outre très polyvalente, dans la mesure où une même plaque 5 peut être utilisée dans des échangeurs comportant différents nombres de plaques, seules les pièces de raccord à la région d'entrée et de sortie de l'échangeur devant alors être modifiées.The arrows shown in FIG. 1 indicate the direction of the flow of gas through the exchanger 1. The design of the plates 5 provided with the orifice 7 makes it possible to avoid having to use a traditional gas reservoir, which often constitutes a complex and relatively expensive piece of work in exchangers with a large number of plates. The design of the plates 5 is also very versatile, insofar as the same plate 5 can be used in exchangers with different numbers of plates, only the connecting parts to the inlet and outlet region of the exchanger in front of then be modified.
Ce type de plaques 5 permet une fabrication très simple des échangeurs en forme de « U » asymétriques puisque seules les pièces de raccord à la région d'entrée et de sortie de l'échangeur doivent être modifiées. La configuration de ces pièces de raccord conditionne le nombre de plaques utilisées par le gaz pour entrer dans l'échangeur et en sortir. Le nombre de plaques utilisées pour l'entrée du gaz peut être plus important que le nombre de plaques utilisées pour sa sortie, ce nombre dépendant commodément de l'augmentation de densité du gaz à travers l'échangeur au fur et à mesure de son refroidissement.This type of plate 5 allows a very simple manufacturing of asymmetrical "U" -shaped exchangers since only the connecting pieces to the inlet and outlet region of the exchanger must be modified. The configuration of these connecting pieces conditions the number of plates used by the gas to enter the exchanger and out. The number of plates used for the gas inlet may be greater than the number of plates used for its outlet, this number depending conveniently on the increase in density of the gas through the exchanger as it cools. .
La configuration de l'échangeur 1 de l'invention est très polyvalente, puisque celui-ci peut contenir deux éléments perturbateurs différents, un pour les plaques où le gaz est chaud, un autre, plus dense, pour les plaques où le gaz est plus froid et possède une densité supérieure. Ceci permet donc d'accroître l'efficacité de l'échangeur sans en augmenter le volume.The configuration of the exchanger 1 of the invention is very versatile, since it can contain two different disturbing elements, one for the plates where the gas is hot, another, more dense, for the plates where the gas is more cold and has a higher density. This therefore increases the efficiency of the exchanger without increasing the volume.
Selon un autre mode de réalisation de l'invention, l'échangeur peut incorporer deux circuits de refroidissement différents. Comme l'illustre la figure 3, l'échangeur comprend, pour chaque circuit de refroidissement respectif, des conduits d'entrée 12a, 13a et de sortie 12b, 13b correspondants. Le circuit de refroidissement à haute température peut refroidir les plaques où le gaz est chaud, tandis que le circuit de refroidissement à basse température peut refroidir les plaques où le gaz est froid. Ceci permet donc d'accroître l'efficacité de l'échangeur sans en augmenter le volume.According to another embodiment of the invention, the exchanger can incorporate two different cooling circuits. As illustrated in FIG. 3, the exchanger comprises, for each respective cooling circuit, corresponding inlet ducts 12a, 13a and outlet ducts 12b, 13b. The high temperature cooling circuit can cool the plates where the gas is hot, while the low temperature cooling circuit can cool the plates where the gas is cold. This therefore increases the efficiency of the exchanger without increasing the volume.
Toutes ces possibilités peuvent être aisément combinées pour améliorer ainsi davantage l'efficacité d'un échangeur ou pour concevoir un échangeur de taille réduite offrant une efficacité équivalente. All of these possibilities can be easily combined to further enhance the efficiency of a heat exchanger or to design a smaller heat exchanger with equivalent efficiency.

Claims

REVENDICATIONS
1. Echangeur de chaleur (1) à plaques empilées, notamment pour les gaz d'échappement d'un moteur, comprenant un corps (2) définissant une trajectoire en forme de « U », destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement, dont l'entrée (3) et la sortie (4) des gaz à refroidir sont adjacentes et disposées l'une au-dessus de l'autre, ledit corps (2) comprenant deux étages supérieur (2a) et inférieur (2b) parallèles et indépendants, pourvus d'une pluralité de plaques empilées (5), caractérisé en ce que les plaques (5) sont fermées par leur extrémité finale (6) et incorporent à proximité de ladite extrémité finale (6) un orifice passant (7) définissant la trajectoire de retour du gaz de l'étage de plaques supérieur (2a) à l'étage de plaques inférieur (2b), ou vice-versa, ledit orifice (7) étant fermé par une plaque supérieure (8) et une plaque inférieure (9).1. Heat exchanger (1) with stacked plates, in particular for the exhaust gases of an engine, comprising a body (2) defining a "U" -shaped path for the circulation of gases with heat exchange with a cooling fluid, whose inlet (3) and the outlet (4) of the gases to be cooled are adjacent and arranged one above the other, said body (2) comprising two upper stages (2a) and lower (2b) parallel and independent, provided with a plurality of stacked plates (5), characterized in that the plates (5) are closed by their final end (6) and incorporate close to said final end (6) a passing orifice (7) defining the gas return path from the upper plate stage (2a) to the lower plate stage (2b), or vice versa, said orifice (7) being closed by an upper plate (8) and a lower plate (9).
2. Echangeur (1) selon la revendication 1, caractérisé en ce que chaque plaque (5) incorpore un élément perturbateur du flux de gaz.2. Exchanger (1) according to claim 1, characterized in that each plate (5) incorporates a disturbing element of the gas flow.
3. Echangeur (1) selon la revendication 2, caractérisé en ce que chaque étage de plaques supérieur (2a) et inférieur (2b) incorpore un élément perturbateur de type différent.3. Exchanger (1) according to claim 2, characterized in that each upper plate stage (2a) and lower (2b) incorporates a disturbing element of different type.
4. Echangeur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque étage de plaques supérieur (2a) et inférieur (2b) incorpore un circuit de fluide de refroidissement de type différent.4. Exchanger (1) according to any one of the preceding claims, characterized in that each upper plate stage (2a) and lower (2b) incorporates a cooling fluid circuit of different type.
5. Echangeur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface transversale de l'orifice (7) est à peu près égale à la surface transversale de l'entrée (3) de gaz. 5. Exchanger (1) according to any one of the preceding claims, characterized in that the transverse surface of the orifice (7) is approximately equal to the transverse surface of the inlet (3) of gas.
6. Echangeur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un réservoir de gaz (10) couplé à la région d'entrée et de sortie des gaz de l'échangeur (1).6. Exchanger (1) according to any one of the preceding claims, characterized in that it comprises a gas tank (10) coupled to the inlet and outlet region of the gas exchanger (1).
7. Echangeur (1) selon la revendication 6, caractérisé en ce que le réservoir de gaz (10) présente une configuration sensiblement orthogonale incorporant un orifice supérieur (3) permettant l'entrée des gaz selon une direction sensiblement perpendiculaire aux plaques (5), et un orifice frontal (4) permettant la sortie des gaz selon une direction sensiblement parallèle aux plaques (5).7. Exchanger (1) according to claim 6, characterized in that the gas reservoir (10) has a substantially orthogonal configuration incorporating an upper orifice (3) allowing the entry of gases in a direction substantially perpendicular to the plates (5). , and a front orifice (4) allowing the gas to exit in a direction substantially parallel to the plates (5).
8. Echangeur (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il incorpore une vanne by-pass (11) permettant l'ouverture ou la fermeture du passage des gaz vers l'échangeur (1).8. Exchanger (1) according to any one of the preceding claims, characterized in that it incorporates a bypass valve (11) for opening or closing the passage of the gas to the exchanger (1).
9. Echangeur (1) selon la revendication 8, caractérisé en ce que la vanne by-pass (11) est intégrée au réservoir de gaz (10) proprement dit de l'échangeur (1).9. Exchanger (1) according to claim 8, characterized in that the bypass valve (11) is integrated in the gas tank (10) itself of the exchanger (1).
10. Echangeur (1) selon la revendication 8 ou 9, caractérisé en ce que la vanne by-pass (11) est une vanne papillon.10. Exchanger (1) according to claim 8 or 9, characterized in that the bypass valve (11) is a butterfly valve.
11. Echangeur (1) selon la revendication 10, caractérisé en ce que la vanne by-pass (11) comprend une plaque (11) articulée autour d'un axe situé au centre des régions d'entrée et de sortie des étages de plaques supérieur (2a) et inférieur (2b) respectifs, de telle sorte que, lorsque la vanne est ouverte, la plaque (11) occupe une position parallèle aux plaques (5) en permettant ainsi l'entrée et la sortie des gaz, et, lorsque la vanne est fermée, la plaque (11) occupe une position inclinée permettant de boucher les orifices d'entrée (3) et de sortie (4) du réservoir de- gaz (10) . 11. Exchanger (1) according to claim 10, characterized in that the bypass valve (11) comprises a plate (11) articulated about an axis located in the center of the inlet and outlet regions of the plate stages. upper (2a) and lower (2b), such that when the valve is open, the plate (11) occupies a position parallel to the plates (5) thus allowing the entry and exit of gases, and, when the valve is closed, the plate (11) occupies an inclined position making it possible to plug the inlet (3) and outlet (4) ports of the gas tank (10).
PCT/EP2006/012658 2005-12-23 2006-12-22 Heat exchanger with stacked plates WO2007079983A1 (en)

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WO2013079880A1 (en) * 2011-12-01 2013-06-06 Valeo Systemes De Controle Moteur Valve for a gas flow circuit in a vehicle
US9567927B2 (en) 2011-12-01 2017-02-14 Valeo Systemes De Controle Moteur Valve for a gas flow circuit in a vehicle
FR2996620A1 (en) * 2012-10-10 2014-04-11 Valeo Sys Controle Moteur Sas VALVE WITH PIVOTING SHUTTER
WO2014057198A1 (en) * 2012-10-10 2014-04-17 Valeo Systemes De Controle Moteur Valve, in particular for a combustion engine
CN104838188A (en) * 2012-10-10 2015-08-12 法雷奥电机控制系统公司 Valve, in particular for combustion engine
CN104838188B (en) * 2012-10-10 2017-07-28 法雷奥电机控制系统公司 Particularly it is used for the valve of explosive motor
CN105715359A (en) * 2014-12-23 2016-06-29 福特环球技术公司 Active airpath bypass system
CN105715359B (en) * 2014-12-23 2021-11-12 福特环球技术公司 Active air path bypass system
CN110439788A (en) * 2019-08-21 2019-11-12 宁波戴维医疗器械股份有限公司 A kind of medical-grade compressor

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