EP1271083B1 - Inlet and outlet tube arrangement for evaporator - Google Patents

Inlet and outlet tube arrangement for evaporator Download PDF

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Publication number
EP1271083B1
EP1271083B1 EP02012051A EP02012051A EP1271083B1 EP 1271083 B1 EP1271083 B1 EP 1271083B1 EP 02012051 A EP02012051 A EP 02012051A EP 02012051 A EP02012051 A EP 02012051A EP 1271083 B1 EP1271083 B1 EP 1271083B1
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EP
European Patent Office
Prior art keywords
chambers
row
heat exchanger
fluid
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP02012051A
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German (de)
French (fr)
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EP1271083A2 (en
EP1271083A3 (en
Inventor
Frédéric Bousquet
Sylvain Moreau
Patrick Samy
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Valeo Climatisation SA
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Valeo Climatisation SA
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Publication of EP1271083A2 publication Critical patent/EP1271083A2/en
Publication of EP1271083A3 publication Critical patent/EP1271083A3/en
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Publication of EP1271083B1 publication Critical patent/EP1271083B1/en
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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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
    • F28D1/0341—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members with U-flow or serpentine-flow inside the conduits
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • 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
    • F28D2021/0085—Evaporators

Definitions

  • the invention relates to a heat exchanger comprising a multiplicity of mutually stacked pouches in a longitudinal direction and each defining two chambers juxtaposed in a lateral direction so as to form respectively a first and a second row of chambers, as well as a U-shaped elementary path extending substantially in a plane perpendicular to the longitudinal direction of one of the other chambers, for circulating a first fluid in thermal contact with a second fluid, two chambers of the same row , belonging to two pockets close to the stack, being delimited in the longitudinal direction by respective walls applied against each other, some of these walls being provided with openings allowing a communication of sealed fluid between the adjacent chambers, the exchanger further comprising an inlet manifold and an outlet manifold for the first fluid ide, disposed at a first longitudinal end of the exchanger, substantially in alignment with said first and second rows respectively, and each communicating with one of the chambers.
  • Such an exchanger is described in EP-A-0 905 467.
  • Such heat exchangers are used in particular as evaporators in vehicle air-conditioning loops, the first fluid being a refrigerant circulating in the loop, and the second fluid being air intended for the passenger compartment of the vehicle.
  • the object of the invention is to provide an arrangement of inlet and outlet pipes for reducing the size of the heat exchanger, both when the first fluid flows in four passes and when it flows in six. passes.
  • the invention relates in particular to a heat exchanger according to claim 1.
  • Figure 1 is a sectional top view of a first embodiment of an evaporator according to the invention.
  • Figures 2 to 4 are partial perspective views of other embodiments of an evaporator according to the invention.
  • FIG. 1 shows an evaporator according to the invention, in section along the plane passing through the axes of the two rows of chambers.
  • This evaporator consists essentially of a stack of pouches and corrugated inserts as described for example in FR 2 747 462 A, which can be referred to for more details on the structure of this stack.
  • Each pocket 1 is formed of two sheet metal plates stamped in the form of cups 2 and 3. The latter are identical to each other and have their concavities facing each other, respectively upwardly and downwardly from FIG. .
  • Each bowl has, in a plane perpendicular to that of the figure, a peripheral edge 4 and a median junction zone 5 connecting thereto at the upper end of the bowl and extending down to the vicinity of its lower end.
  • the peripheral edges 4 and the junction zones 5 of the two cups forming a pocket are mutually assembled in fluid-tight manner, for example by soldering, to delimit the interior volume of the pouch.
  • This interior volume comprises two chambers 6 and 7, located on either side of the zones 5 respectively to the right and to the left of the figure, defined by deep stampings of the plates 2, 3, connected to each other by an elementary path in U for the refrigerant.
  • Chambers 6 and 7 occupy a minority fraction of the height of the evaporator at the top of the latter, the elementary U-shaped path extending over the rest of the height, behind the plane of the figure, and on a smaller thickness in the longitudinal direction.
  • a plate 2 and a plate 3 neighbors belonging to two different pockets are in mutual support by their bottoms 8 facing the chambers 6 and 7, and separated from one another, facing the U-shaped paths, by a packed interval a corrugated spacer defining an elementary path for the air to be cooled, parallel to the plane of the figure, along the arrow F1.
  • the funds 8 in mutual contact are brazed together and some of them are crossed by openings 9 communicating between them corresponding chambers.
  • the bottom 8 of the plate 2 located at the end 20 of the stack facing downwards of FIG. 1 is closed so as to separate the chambers 6 and 7 adjacent to this plate from the outside.
  • an end box 10 is disposed beyond the last pouch 1.
  • the box 10 is formed of two plates, namely a stamped plate 11 and a substantially flat end plate 12.
  • the plates 11 and 12 are connected in a sealed manner by annular zones 13 and by vertical median zones 14, delimiting on either side of the latter two compartments 15, 16 of the internal volume. of the box 10, wrapped by respective stampings of the plate 11 and respectively aligned with the rows formed by the chambers 6 and 7.
  • An inlet pipe 17 and an outlet pipe 18 of the evaporator are fixed on the plate 12 so as to communicate respectively with the compartments 15 and 16.
  • An injection tube 19 extends longitudinally in the row of the chambers 6, through the openings 9 which connect them to each other, while leaving free part of the surface of these openings.
  • a first end of the tube 19 is in the compartment 15, and its opposite end is located in a chamber 6 belonging to a collecting space 22 adjacent to the end 20 of the evaporator, formed by a subset of connected chambers 6 9
  • the collecting space 22 is limited in the direction of the end 21 by a partition 23 penetrated in a sealed manner by the tube 19.
  • the tube 19 passes in a sealed manner a partition 24 separating the compartment 15 of the chamber 6 adjacent thereto, this partition being formed by the bottoms of stampings plates 11 and 3 defining the compartment and this chamber.
  • the chambers 6 between the partitions 23 and 24 communicate with each other through openings 9 to form a collecting space 25.
  • the row of the chambers 7 is separated by a partition 26 into a collecting space 27 adjacent to the end 20 and a collecting space 28 between the partition 26 and the compartment 16 and communicating with it through the opening 9 of the end plate 3 of the stack and a corresponding opening of the plate 11.
  • the partition 26 is further from the end 20 than the partition 23.
  • the refrigerant fluid entering the evaporator through the inlet pipe 17 passes first into the compartment 15, from where the injection tube 19 brings it into the collecting space 22. From the collecting space 22, the fluid travels in parallel elementary paths U defined by the pouches that define it, the branches that communicate with the chambers 6 and those that communicate with the chambers 7 forming respectively a first pass and a second pass, the latter leading to the collecting space 27. Similarly, the elementary U-shaped pockets of the pouches comprised in the longitudinal direction between the partitions 23 and 26 form a third pass and a fourth pass connecting the collecting spaces 27 and 25, and those of the pockets included between the partitions 26 and 24 form a fifth pass and a sixth pass connecting the collecting spaces 25 and 28. The fluid from the collecting space 28 passes into the compartment. container 16 and then leaves the evaporator through the outlet pipe 18.
  • FIG. 1 shows that the tubes 17 and 18 are offset relative to one another in the vertical direction, that is to say in the plane perpendicular to the figure.
  • This arrangement has several advantages. It makes it possible to reduce the width (or thickness) of the evaporator, for example below 60 mm, for reasons of space in this direction, while maintaining a sufficient distance between the inlet and outlet pipes. output to avoid mounting difficulties. It also allows, if desired to meet the needs of the connection of the evaporator to the rest of the air conditioning loop, to bend the inlet and outlet pipes to bring them in the lateral direction, while being arranged the one above the other to limit congestion in the longitudinal direction.
  • the injection tube 19 is advantageously offset from the centers of the openings 9 to the right, that is to say downstream of the air flow F1.
  • FIG. 2 diagrammatically represents an evaporator according to the invention in which the refrigerant circulates in four passes.
  • This evaporator comprises a stack of pouches and inserts as described above, only a plate 3, belonging to an end pocket, and a tab 100 being shown.
  • To this plate 3 is contiguous a stamped plate 111 which forms with a substantially flat plate 112 an end box 110.
  • An injection tube 119 similar to the tube 19 of Figure 1 is sealingly connected to an inlet manifold 117 located opposite the outer face of the plate 112, the assembly through sealingly this plate.
  • An outlet pipe 118 fixed so as to project also on the outer face of the plate 112, communicates with the unitary internal volume 115 of the box 110, which surrounds the tube 119.
  • a partition (not shown) separates into two collecting spaces the However, the chambers of the other row all communicate with each other to form a single collecting space, and are separated from the internal volume 115 by the bottom of the stamp of the plate 111. .
  • the refrigerant penetrating through the inlet pipe 117 passes directly into the injection tube 119 which brings it into the collecting space of the first row farthest from the pipe 117.
  • the fluid circulates in the elementary paths in a vertical direction. along a four-pass path that returns it to the collecting space of the first row adjacent to the box 110, from which it gains the interior volume 115 through a defined annular passage around the tube 119, through an opening 109 of the plate 3 adjacent to the plate 111 and an opening 130 thereof. Finally, the fluid leaves the volume 115, and the evaporator, through the outlet pipe 118.
  • the plates 111 and 112 extend over the entire height of the evaporator, the portion 131 of the plate 111 located lower than the interior volume 115 being flat and vertical is contiguous to the plate 112. These two plates have recesses 132, 133 for lightening the evaporator.
  • the evaporator of FIG. 3 differs from that of FIG. 2 only by the suppression of the flat portion 131 of the plate 111, below its annular zone of junction with the plate 112, which of course does not affect no way the operation of the evaporator.
  • Figure 4 shows plates 111 and 112 similar to those of Figure 3, made by cutting, stamping and bending from a single flat sheet. It shows in broken line the plate 111 obtained after cutting and stamping, disposed above the plate 112, its peripheral edge 113 being located in the plane of the plate 112. The final position of the plate 111 is obtained by a rotation of 180 ° around a horizontal fold line, according to the arrow F2.
  • the indications relating to the orientation or the position in the space of the elements refer to a particular orientation of the evaporator, and must therefore be adapted if it is modified.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

The plate evaporator comprises a stack of pockets (1) each formed by two stamped plates (2,3) delimiting an inlet (6) and an outlet (7) chamber. One of the inlet and outlet tubes (17,18) located at the same stack end (21) communicates with the chambers through an end box (10) interposed between the stack and the tubes. The dimensions of the end box allow a mutual height offset of the tubes facilitating their placing and connection.

Description

L'invention concerne un échangeur de chaleur comprenant une multiplicité de pochettes mutuellement empilées dans une direction longitudinale et définissant chacune deux chambres juxtaposées dans une direction latérale de manière à faire partie respectivement d'une première et d'une seconde rangées de chambres, ainsi qu'un trajet élémentaire en U s'étendant sensiblement dans un plan perpendiculaire à la direction longitudinale de l'une à l'autre desdites chambres, pour faire circuler un premier fluide en contact thermique avec un second fluide, deux chambres d'une même rangée, appartenant à deux pochettes voisines de l'empilement, étant délimitées dans la direction longitudinale par des parois respectives appliquées l'une contre l'autre, certaines de ces parois étant munies d'ouvertures permettant une communication de fluide étanche entre les chambres adjacentes, l'échangeur comprenant en outre une tubulure d'entrée et une tubulure de sortie pour le premier fluide, disposées à une première extrémité longitudinale de l'échangeur, sensiblement dans l'alignement desdites première et seconde rangées respectivement, et communiquant chacune avec l'une des chambres. Un tel échangeur est décrit dans le document EP-A-0 905 467.The invention relates to a heat exchanger comprising a multiplicity of mutually stacked pouches in a longitudinal direction and each defining two chambers juxtaposed in a lateral direction so as to form respectively a first and a second row of chambers, as well as a U-shaped elementary path extending substantially in a plane perpendicular to the longitudinal direction of one of the other chambers, for circulating a first fluid in thermal contact with a second fluid, two chambers of the same row , belonging to two pockets close to the stack, being delimited in the longitudinal direction by respective walls applied against each other, some of these walls being provided with openings allowing a communication of sealed fluid between the adjacent chambers, the exchanger further comprising an inlet manifold and an outlet manifold for the first fluid ide, disposed at a first longitudinal end of the exchanger, substantially in alignment with said first and second rows respectively, and each communicating with one of the chambers. Such an exchanger is described in EP-A-0 905 467.

De tels échangeurs de chaleur sont utilisés notamment en tant qu'évaporateurs dans des boucles de climatisation de véhicules, le premier fluide étant un fluide réfrigérant circulant dans la boucle, et le second fluide étant de l'air destiné à l'habitacle du véhicule.Such heat exchangers are used in particular as evaporators in vehicle air-conditioning loops, the first fluid being a refrigerant circulating in the loop, and the second fluid being air intended for the passenger compartment of the vehicle.

Le but de l'invention est de proposer un agencement des tubulures d'entrée et de sortie permettant une diminution de l'encombrement de l'échangeur de chaleur, aussi bien lorsque le premier fluide circule en quatre passes que lorsqu'il circule en six passes.The object of the invention is to provide an arrangement of inlet and outlet pipes for reducing the size of the heat exchanger, both when the first fluid flows in four passes and when it flows in six. passes.

L'invention vise notamment un échangeur de chaleur selon la revendication 1.The invention relates in particular to a heat exchanger according to claim 1.

Des caractéristiques optionnelles de l'invention, complémentaires ou de substitution, sont énoncées ci-après:

  • La boîte d'extrémité définit deux compartiments séparés situés respectivement dans l'alignement des deux rangées, chacune desdites tubulures communiquant avec la chambre correspondante par l'intermédiaire de l'un desdits compartiments.
  • Le compartiment communiquant avec la tubulure d'entrée est relié à l'extrémité amont d'un tube d'injection qui traverse une partie de l'empilement de pochettes, dans la direction longitudinale, pour amener le premier fluide à une chambre de la première rangée éloignée de la première extrémité.
  • Lesdits trajets élémentaires en U définissent une circulation du premier fluide en six passes, les première et cinquième passes partant de chambres de la première rangée, les seconde et sixième passes aboutissant à des chambres de la seconde rangée, la troisième passe partant de chambres de la seconde rangée et la quatrième passe aboutissant à des chambres de la première rangée.
  • La boîte d'extrémité définit un volume intérieur unitaire situé pour partie dans l'alignement de chacune des deux rangées et communiquant directement avec la tubulure de sortie, la tubulure d'entrée étant raccordée à un tube d'injection qui traverse la boîte d'extrémité et une partie de l'empilement de pochettes, dans la direction longitudinale, pour amener le premier fluide à une chambre de la première rangée éloignée de la première extrémité.
  • Ledit volume intérieur communique avec la chambre adjacente de la première rangée par un passage annulaire entourant le tube d'injection.
  • Lesdits trajets élémentaires en U définissent une circulation du premier fluide en quatre passes, la première passe partant de chambres de la première rangée, la seconde passe aboutissant à des chambres de la seconde rangée, la troisième passe partant de chambres de la seconde rangée et la quatrième passe aboutissant à des chambres de la première rangée.
  • Les tubulures d'entrée et de sortie sont mutuellement décalées en hauteur, la boîte d'extrémité s'étendant sur une hauteur plus grande que les chambres, partiellement en regard desdits trajets élémentaires en U.
  • La boîte d'extrémité est formée par une plaque d'extrémité plane et verticale et par une plaque emboutie liée de manière étanche à la face interne de la plaque d'extrémité, à sa périphérie et le cas échéant en une zone médiane séparant les deux compartiments.
  • La plaque d'extrémité, et optionnellement la plaque emboutie, s'étendent sensiblement sur toute la hauteur de l'échangeur.
  • La plaque d'extrémité et la plaque emboutie sont des parties d'une plaque unitaire reliées entre elles par une ligne de pliage.
Optional features of the invention, complementary or substitution, are set out below:
  • The end box defines two separate compartments located respectively in the alignment of the two rows, each of said tubings communicating with the corresponding chamber through one of said compartments.
  • The compartment communicating with the inlet manifold is connected to the upstream end of an injection tube which passes through a portion of the stack of pouches, in the longitudinal direction, to bring the first fluid to a chamber of the first row away from the first end.
  • Said elementary U-shaped paths define a circulation of the first fluid in six passes, the first and fifth passes starting from chambers of the first row, the second and sixth passes ending in chambers of the second row, the third passing from chambers of the second row and fourth pass leading to first row rooms.
  • The end box defines a unitary internal volume located partly in alignment with each of the two rows and communicating directly with the outlet tubing, the inlet tubing being connected to an injection tube which passes through the tubular housing. end and a portion of the stack of pouches, in the longitudinal direction, to bring the first fluid to a chamber of the first row remote from the first end.
  • Said inner volume communicates with the adjacent chamber of the first row by an annular passage surrounding the injection tube.
  • Said elementary U-shaped paths define a flow of the first fluid in four passes, the first pass starting from chambers of the first row, the second pass ending in chambers of the second row, the third pass starting from chambers of the second row and the fourth pass leading to first row rooms.
  • The inlet and outlet pipes are mutually offset in height, the end box extending over a height greater than the chambers, partially facing said elementary paths in U.
  • The end box is formed by a flat and vertical end plate and a stamped plate sealingly attached to the inner face of the end plate, at its periphery and optionally in a medial zone separating the two compartments.
  • The end plate, and optionally the stamped plate, extend substantially over the entire height of the exchanger.
  • The end plate and the stamped plate are parts of a unitary plate interconnected by a fold line.

Les caractéristiques et avantages de l'invention seront exposés plus en détail dans la description ci-après, en se référant aux dessins annexés.The features and advantages of the invention will be set forth in more detail in the description below, with reference to the accompanying drawings.

La figure 1 est une vue de dessus en coupe d'un premier mode de réalisation d'un évaporateur selon l'invention.Figure 1 is a sectional top view of a first embodiment of an evaporator according to the invention.

Les figures 2 à 4 sont des vues partielles en perspective d'autres modes de réalisation d'un évaporateur selon l'invention.Figures 2 to 4 are partial perspective views of other embodiments of an evaporator according to the invention.

La figure 1 représente un évaporateur selon l'invention, en coupe selon le plan passant par les axes des deux rangées de chambres. Cet évaporateur est constitué essentiellement par un empilement de pochettes et d'intercalaires ondulés tel que décrit par exemple dans FR 2 747 462 A, auquel on pourra se reporter pour plus de détails sur la structure de cet empilement. Chaque pochette 1 est formée de deux plaques de tôle embouties en forme de cuvettes 2 et 3. Ces dernières sont identiques entre elles et ont leurs concavités tournées l'une vers l'autre, soit respectivement vers le haut et vers le bas de la figure. Chaque cuvette présente, dans un plan perpendiculaire à celui de la figure, un bord périphérique 4 et une zone de jonction médiane 5 se raccordant à celui-ci à l'extrémité supérieure de la cuvette et se prolongeant vers le bas jusqu'au voisinage de son extrémité inférieure. Les bords périphériques 4 et les zones de jonction 5 des deux cuvettes formant une pochette sont mutuellement assemblés de façon étanche au fluide, par exemple par brasage, pour délimiter le volume intérieur de la pochette. Ce volume intérieur comprend deux chambres 6 et 7, situées de part et d'autre des zones 5 respectivement vers la droite et vers la gauche de la figure, définies par des emboutis profonds des plaques 2, 3, reliées entre elles par un trajet élémentaire en U pour le fluide réfrigérant. Les chambres 6 et 7 occupent une fraction minoritaire de la hauteur de l'évaporateur à la partie supérieure de celui-ci, le trajet élémentaire en U s'étendant sur le reste de la hauteur, en arrière du plan de la figure, et sur une plus faible épaisseur dans la direction longitudinale. Une plaque 2 et une plaque 3 voisines appartenant à deux pochettes différentes sont en appui mutuel par leurs fonds 8 en regard des chambres 6 et 7, et séparées l'une de l'autre, en regard des trajets en U, par un intervalle garni d'un intercalaire ondulé définissant un trajet élémentaire pour l'air à refroidir, parallèlement au plan de la figure, selon la flèche F1. Les fonds 8 en contact mutuel sont brasés ensemble et certains d'entre eux sont traversés par des ouvertures 9 faisant communiquer entre elles les chambres correspondantes.Figure 1 shows an evaporator according to the invention, in section along the plane passing through the axes of the two rows of chambers. This evaporator consists essentially of a stack of pouches and corrugated inserts as described for example in FR 2 747 462 A, which can be referred to for more details on the structure of this stack. Each pocket 1 is formed of two sheet metal plates stamped in the form of cups 2 and 3. The latter are identical to each other and have their concavities facing each other, respectively upwardly and downwardly from FIG. . Each bowl has, in a plane perpendicular to that of the figure, a peripheral edge 4 and a median junction zone 5 connecting thereto at the upper end of the bowl and extending down to the vicinity of its lower end. The peripheral edges 4 and the junction zones 5 of the two cups forming a pocket are mutually assembled in fluid-tight manner, for example by soldering, to delimit the interior volume of the pouch. This interior volume comprises two chambers 6 and 7, located on either side of the zones 5 respectively to the right and to the left of the figure, defined by deep stampings of the plates 2, 3, connected to each other by an elementary path in U for the refrigerant. Chambers 6 and 7 occupy a minority fraction of the height of the evaporator at the top of the latter, the elementary U-shaped path extending over the rest of the height, behind the plane of the figure, and on a smaller thickness in the longitudinal direction. A plate 2 and a plate 3 neighbors belonging to two different pockets are in mutual support by their bottoms 8 facing the chambers 6 and 7, and separated from one another, facing the U-shaped paths, by a packed interval a corrugated spacer defining an elementary path for the air to be cooled, parallel to the plane of the figure, along the arrow F1. The funds 8 in mutual contact are brazed together and some of them are crossed by openings 9 communicating between them corresponding chambers.

Le fond 8 de la plaque 2 située à l'extrémité 20 de l'empilement tournée vers le bas de la figure 1 est fermé de manière à séparer de l'extérieur les chambres 6 et 7 adjacentes à cette plaque. À l'extrémité opposée 21 de l'empilement de pochettes, c'est-à-dire vers le haut de la figure, une boîte d'extrémité 10 est disposée au-delà de la dernière pochette 1. La boîte 10 est formée de deux plaques, à savoir une plaque emboutie 11 et une plaque d'extrémité 12 sensiblement plane. De même que les plaques 2 et 3, les plaques 11 et 12 sont reliées de manière étanche par des zones annulaires 13 et par des zones médianes verticales 14, délimitant de part et d'autre de ces dernières deux compartiments 15, 16 du volume interne de la boîte 10, enveloppés par des emboutis respectifs de la plaque 11 et alignés respectivement avec les rangées formées par les chambres 6 et 7. Une tubulure d'entrée 17 et une tubulure de sortie 18 de l'évaporateur sont fixées sur la plaque 12 de manière à communiquer respectivement avec les compartiments 15 et 16. Un tube d'injection 19 s'étend longitudinalement dans la rangée des chambres 6, en traversant les ouvertures 9 qui relient celles-ci entre elles, tout en laissant libre une partie de la surface de ces ouvertures. Une première extrémité du tube 19 se situe dans le compartiment 15, et son extrémité opposée est située dans une chambre 6 appartenant à un espace collecteur 22 adjacente à l'extrémité 20 de l'évaporateur, formée par un sous-ensemble de chambres 6 reliées entre elles par des ouvertures 9. L'espace collecteur 22 est limité en direction de l'extrémité 21 par une cloison 23 traversée de manière étanche par le tube 19. De même, le tube 19 traverse de manière étanche une cloison 24 séparant le compartiment 15 de la chambre 6 adjacente à celui-ci, cette cloison étant formée par les fonds des emboutis des plaques 11 et 3 délimitant ce compartiment et cette chambre. Les chambres 6 comprises entre les cloisons 23 et 24 communiquent entre elles par des ouvertures 9 pour former un espace collecteur 25. De même, la rangée des chambres 7 est séparée par une cloison 26 en un espace collecteur 27 adjacent à l'extrémité 20 et un espace collecteur 28 compris entre la cloison 26 et le compartiment 16 et communiquant avec celui-ci par l'ouverture 9 de la plaque terminale 3 de l'empilement et une ouverture correspondante de la plaque 11. La cloison 26 est plus éloignée de l'extrémité 20 que la cloison 23.The bottom 8 of the plate 2 located at the end 20 of the stack facing downwards of FIG. 1 is closed so as to separate the chambers 6 and 7 adjacent to this plate from the outside. At the opposite end 21 of the stack of pouches, i.e. towards the top of the figure, an end box 10 is disposed beyond the last pouch 1. The box 10 is formed of two plates, namely a stamped plate 11 and a substantially flat end plate 12. As well as the plates 2 and 3, the plates 11 and 12 are connected in a sealed manner by annular zones 13 and by vertical median zones 14, delimiting on either side of the latter two compartments 15, 16 of the internal volume. of the box 10, wrapped by respective stampings of the plate 11 and respectively aligned with the rows formed by the chambers 6 and 7. An inlet pipe 17 and an outlet pipe 18 of the evaporator are fixed on the plate 12 so as to communicate respectively with the compartments 15 and 16. An injection tube 19 extends longitudinally in the row of the chambers 6, through the openings 9 which connect them to each other, while leaving free part of the surface of these openings. A first end of the tube 19 is in the compartment 15, and its opposite end is located in a chamber 6 belonging to a collecting space 22 adjacent to the end 20 of the evaporator, formed by a subset of connected chambers 6 9 The collecting space 22 is limited in the direction of the end 21 by a partition 23 penetrated in a sealed manner by the tube 19. Similarly, the tube 19 passes in a sealed manner a partition 24 separating the compartment 15 of the chamber 6 adjacent thereto, this partition being formed by the bottoms of stampings plates 11 and 3 defining the compartment and this chamber. The chambers 6 between the partitions 23 and 24 communicate with each other through openings 9 to form a collecting space 25. Similarly, the row of the chambers 7 is separated by a partition 26 into a collecting space 27 adjacent to the end 20 and a collecting space 28 between the partition 26 and the compartment 16 and communicating with it through the opening 9 of the end plate 3 of the stack and a corresponding opening of the plate 11. The partition 26 is further from the end 20 than the partition 23.

Le fluide réfrigérant pénétrant dans l'évaporateur par la tubulure d'entrée 17 passe d'abord dans le compartiment 15, d'où le tube d'injection 19 l'amène dans l'espace collecteur 22. À partir de l'espace collecteur 22, le fluide parcourt en parallèle les trajets élémentaires en U délimités par les pochettes qui le définissent, les branches qui communiquent avec les chambres 6 et celles qui communiquent avec les chambres 7 formant respectivement une première passe et une seconde passe, cette dernière aboutissant à l'espace collecteur 27. De même, les trajets élémentaires en U des pochettes comprises dans la direction longitudinale entre les cloisons 23 et 26 forment une troisième passe et une quatrième passe reliant les espaces collecteurs 27 et 25, et ceux des pochettes comprises entre les cloisons 26 et 24 forment une cinquième passe et une sixième passe reliant les espaces collecteurs 25 et 28. Le fluide provenant de l'espace collecteur 28 passe dans le compartiment 16 puis quitte l'évaporateur par la tubulure de sortie 18.The refrigerant fluid entering the evaporator through the inlet pipe 17 passes first into the compartment 15, from where the injection tube 19 brings it into the collecting space 22. From the collecting space 22, the fluid travels in parallel elementary paths U defined by the pouches that define it, the branches that communicate with the chambers 6 and those that communicate with the chambers 7 forming respectively a first pass and a second pass, the latter leading to the collecting space 27. Similarly, the elementary U-shaped pockets of the pouches comprised in the longitudinal direction between the partitions 23 and 26 form a third pass and a fourth pass connecting the collecting spaces 27 and 25, and those of the pockets included between the partitions 26 and 24 form a fifth pass and a sixth pass connecting the collecting spaces 25 and 28. The fluid from the collecting space 28 passes into the compartment. container 16 and then leaves the evaporator through the outlet pipe 18.

On voit sur la figure 1 que les tubulures 17 et 18 sont décalées l'une par rapport à l'autre dans la direction verticale, c'est-à-dire dans le plan perpendiculaire à la figure. Cette disposition présente plusieurs avantages. Elle permet de réduire la largeur (ou l'épaisseur) de l'évaporateur, par exemple au-dessous de 60 mm, pour des raisons d'encombrement dans cette direction, tout en maintenant un entre-axe suffisant des tubulures d'entrée et de sortie pour éviter des difficultés de montage. Elle permet également, si cela est souhaité pour répondre aux nécessités du raccordement de l'évaporateur au reste de la boucle de climatisation, de couder les tubulures d'entrée et de sortie pour les amener dans la direction latérale, tout en étant disposées l'une au-dessus de l'autre pour limiter l'encombrement dans la direction longitudinale.FIG. 1 shows that the tubes 17 and 18 are offset relative to one another in the vertical direction, that is to say in the plane perpendicular to the figure. This arrangement has several advantages. It makes it possible to reduce the width (or thickness) of the evaporator, for example below 60 mm, for reasons of space in this direction, while maintaining a sufficient distance between the inlet and outlet pipes. output to avoid mounting difficulties. It also allows, if desired to meet the needs of the connection of the evaporator to the rest of the air conditioning loop, to bend the inlet and outlet pipes to bring them in the lateral direction, while being arranged the one above the other to limit congestion in the longitudinal direction.

Comme montré sur la Figure 1, le tube d'injection 19 est avantageusement décalé par rapport aux centres des ouvertures 9 vers la droite, c'est-à-dire vers l'aval du flux d'air F1.As shown in Figure 1, the injection tube 19 is advantageously offset from the centers of the openings 9 to the right, that is to say downstream of the air flow F1.

La figure 2 représente schématiquement un évaporateur selon l'invention dans lequel le fluide réfrigérant circule en quatre passes. Cet évaporateur comprend un empilement de pochettes et d'intercalaires comme décrit plus haut, seule une plaque 3, appartenant à une pochette terminale, et un intercalaire 100 étant représentés. À cette plaque 3 est accolée une plaque emboutie 111 qui forme avec une plaque sensiblement plane 112 une boîte d'extrémité 110. Un tube d'injection 119 analogue au tube 19 de la figure 1 est lié de manière étanche à une tubulure d'entrée 117 située en regard de la face extérieure de la plaque 112, l'ensemble traversant de manière étanche cette plaque. Une tubulure de sortie 118, fixée de manière à faire saillie également sur la face externe de la plaque 112, communique avec le volume intérieur unitaire 115 de la boîte 110, qui entoure le tube 119. Une cloison non représentée sépare en deux espaces collecteurs les chambres de la rangée dans laquelle passe le tube 119. En revanche, les chambres de l'autre rangée communiquent toutes entre elles pour former un seul espace collecteur, et sont séparées du volume intérieur 115 par le fond de l'embouti de la plaque 111.FIG. 2 diagrammatically represents an evaporator according to the invention in which the refrigerant circulates in four passes. This evaporator comprises a stack of pouches and inserts as described above, only a plate 3, belonging to an end pocket, and a tab 100 being shown. To this plate 3 is contiguous a stamped plate 111 which forms with a substantially flat plate 112 an end box 110. An injection tube 119 similar to the tube 19 of Figure 1 is sealingly connected to an inlet manifold 117 located opposite the outer face of the plate 112, the assembly through sealingly this plate. An outlet pipe 118, fixed so as to project also on the outer face of the plate 112, communicates with the unitary internal volume 115 of the box 110, which surrounds the tube 119. A partition (not shown) separates into two collecting spaces the However, the chambers of the other row all communicate with each other to form a single collecting space, and are separated from the internal volume 115 by the bottom of the stamp of the plate 111. .

Le fluide réfrigérant pénétrant par la tubulure d'entrée 117 passe directement dans le tube d'injection 119 qui l'amène dans l'espace collecteur de la première rangée le plus éloigné de la tubulure 117. Le fluide circule dans les trajets élémentaires en U selon un parcours en quatre passes qui le ramène dans l'espace collecteur de la première rangée adjacent à la boîte 110, d'où il gagne le volume intérieur 115 par un passage annulaire défini, autour du tube 119, par une ouverture 109 de la plaque 3 adjacente à la plaque 111 et une ouverture 130 de cette dernière. Enfin, le fluide quitte le volume 115, et l'évaporateur, par la tubulure de sortie 118.The refrigerant penetrating through the inlet pipe 117 passes directly into the injection tube 119 which brings it into the collecting space of the first row farthest from the pipe 117. The fluid circulates in the elementary paths in a vertical direction. along a four-pass path that returns it to the collecting space of the first row adjacent to the box 110, from which it gains the interior volume 115 through a defined annular passage around the tube 119, through an opening 109 of the plate 3 adjacent to the plate 111 and an opening 130 thereof. Finally, the fluid leaves the volume 115, and the evaporator, through the outlet pipe 118.

On voit sur la figure 2 que les tubulures 117 et 118, comme les tubulures 17 et 18 de la figure 1, sont mutuellement décalées en hauteur. Ceci implique généralement pour le volume intérieur 115, comme pour les compartiments 15 et 16 de la figure 1, une hauteur plus grande que celle des chambres des pochettes, ce volume intérieur s'étendant donc en partie en regard des trajets élémentaires en U.It can be seen in FIG. 2 that the pipes 117 and 118, like the pipes 17 and 18 of FIG. 1, are mutually offset in height. This generally implies for the interior volume 115, as for the compartments 15 and 16 of FIG. 1, a height greater than that of the chambers of the pockets, this internal volume thus extending in part opposite the elementary U-shaped paths.

Dans l'évaporateur de la figure 2, les plaques 111 et 112 s'étendent sur toute la hauteur de l'évaporateur, la partie 131 de la plaque 111 située plus bas que le volume intérieur 115 étant plane et verticale est accolée à la plaque 112. Ces deux plaques présentent des évidements 132, 133 destinés à alléger l'évaporateur.In the evaporator of FIG. 2, the plates 111 and 112 extend over the entire height of the evaporator, the portion 131 of the plate 111 located lower than the interior volume 115 being flat and vertical is contiguous to the plate 112. These two plates have recesses 132, 133 for lightening the evaporator.

L'évaporateur de la figure 3 diffère de celui de la figure 2 uniquement par la suppression de la partie plane 131 de la plaque 111, au-dessous de sa zone annulaire de jonction avec la plaque 112, ce qui bien entendu n'affecte en aucune manière le fonctionnement de l'évaporateur.The evaporator of FIG. 3 differs from that of FIG. 2 only by the suppression of the flat portion 131 of the plate 111, below its annular zone of junction with the plate 112, which of course does not affect no way the operation of the evaporator.

Enfin, la figure 4 montre des plaques 111 et 112 semblables à celles de la figure 3, réalisées par découpage, emboutissage et pliage à partir d'une tôle plane unique. On voit en trait interrompu la plaque 111 obtenue après découpage et emboutissage, disposée au-dessus de la plaque 112, son bord périphérique 113 étant situé dans le plan de la plaque 112. La position définitive de la plaque 111 est obtenue par une rotation de 180° autour d'une ligne de pliage horizontale, selon la flèche F2.Finally, Figure 4 shows plates 111 and 112 similar to those of Figure 3, made by cutting, stamping and bending from a single flat sheet. It shows in broken line the plate 111 obtained after cutting and stamping, disposed above the plate 112, its peripheral edge 113 being located in the plane of the plate 112. The final position of the plate 111 is obtained by a rotation of 180 ° around a horizontal fold line, according to the arrow F2.

Dans la description ci-dessus, les indications relatives à l'orientation ou à la position dans l'espace des éléments se réfèrent à une orientation particulière de l'évaporateur, et doivent par conséquent être adaptées si celle-ci est modifiée.In the above description, the indications relating to the orientation or the position in the space of the elements refer to a particular orientation of the evaporator, and must therefore be adapted if it is modified.

Claims (11)

  1. Heat exchanger, especially an evaporator for a vehicle air-conditioning loop, comprising a multiplicity of pockets (1) mutually stacked in a longitudinal direction and each defining two chambers (6, 7) juxtaposed in a lateral direction in such a way as to form part of a first and a second row of chambers respectively, the said chambers having a height, and also a U-shaped elementary path extending substantially in a plane perpendicular to the longitudinal direction from one to the other of the said chambers in order to circulate a first fluid in thermal contact with a second fluid, two chambers of the same row, belonging to two neighbouring pockets of the stack, being delimited in the longitudinal direction by respective walls (8) placed one against the other, some of these walls (8) being provided with openings (9) allowing a leaktight communication of fluid between the adjacent chambers, the exchanger additionally comprising an inlet pipe (17) and an outlet pipe (18) for the first fluid, which are arranged at a first longitudinal end (21) of the exchanger, substantially in the alignment of the said first and second rows respectively, and each communicating with one of the chambers, characterized in that at least one (17, 18) of the said pipes communicates with the corresponding chamber via one or two end boxes (10) supplementing the stack of pockets at the said first end, the said end box or boxes (10) being formed by a dished plate (11) and by a substantially flat end plate (12), the said pipes (17, 18) being fixed to the said end plate (12), the said box or boxes (10) having a height greater than that of the said chambers (6, 7) of the said pockets (1), extending in part opposite the U-shaped elementary paths.
  2. Heat exchanger according to Claim 1, in which the end box (10) defines two separate compartments (15, 16) situated respectively in the alignment of the two rows, each of the said pipes communicating with the corresponding chamber via one of the said compartments.
  3. Heat exchanger according to Claim 2, in which the compartment (15) communicating with the inlet pipe (17) is connected to the upstream end of an injection tube (19) which passes through part of the stack of pockets, in the longitudinal direction, so as to lead the first fluid to a first-row chamber remote from the first end.
  4. Heat exchanger according to either one of Claims 2 and 3, in which the said U-shaped elementary paths define a circulation of the first fluid in six passes, the first and fifth passes starting from first-row chambers (6), the second and sixth passes ending at second-row chambers (7), the third pass starting from second-row chambers (7) and the fourth pass ending at first-row chambers (6).
  5. Heat exchanger according to Claim 1, in which the end box (110) defines a unitary interior space (115) situated in part in the alignment of each of the two rows and communicating directly with the outlet pipe (118), the inlet pipe (117) being connected to an injection tube (119) which passes through the end box and through part of the stack of pockets, in the longitudinal direction, so as to lead the first fluid to a first-row chamber remote from the first end.
  6. Heat exchanger according to Claim 5, in which the said interior space communicates with the adjacent first-row chamber by an annular passage (109, 130) surrounding the injection tube (119).
  7. Heat exchanger according to Claim 6, in which the said U-shaped elementary paths define a circulation of the first fluid in four passes, the first pass starting from first-row chambers, the second pass ending at second-row chambers, the third pass starting from second-row chambers and the fourth pass ending at first-row chambers.
  8. Heat exchanger according to one of the preceding claims, in which the inlet and outlet pipes are mutually staggered in height, the end box extending over a height greater than the chambers, partially opposite the said U-shaped elementary paths.
  9. Heat exchanger according to one of the preceding claims, in which the dished plate (11) is joined, at its periphery (13) and, if necessary, in a median zone (14) separating the two compartments, in a leaktight manner to the inner face of the end plate (12).
  10. Heat exchanger according to one of the preceding claims, in which the end plate, and optionally the dished plate, extend substantially over the full height of the exchanger.
  11. Heat exchanger according to one of the preceding claims, in which the end plate and the dished plate are parts of a unitary plate mutually connected by a fold line.
EP02012051A 2001-06-20 2002-05-31 Inlet and outlet tube arrangement for evaporator Expired - Lifetime EP1271083B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0108118 2001-06-20
FR0108118A FR2826438B1 (en) 2001-06-20 2001-06-20 ARRANGEMENT OF INPUT AND OUTPUT TUBES FOR AN EVAPORATOR

Publications (3)

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EP1271083A2 EP1271083A2 (en) 2003-01-02
EP1271083A3 EP1271083A3 (en) 2003-06-04
EP1271083B1 true EP1271083B1 (en) 2006-08-09

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US (1) US6585038B2 (en)
EP (1) EP1271083B1 (en)
JP (1) JP2003050062A (en)
AT (1) ATE335973T1 (en)
DE (1) DE60213717T2 (en)
ES (1) ES2273946T3 (en)
FR (1) FR2826438B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2826439B1 (en) * 2001-06-26 2003-10-03 Valeo Climatisation HEAT EXCHANGER, PARTICULARLY EVAPORATOR, WITH IMPROVED PERFERMANCE
JP4426328B2 (en) * 2004-02-06 2010-03-03 サンデン株式会社 Laminate heat exchanger
FR2918166B1 (en) * 2007-06-27 2017-07-21 Valeo Systemes Thermiques Branche Thermique Moteur HEAT EXCHANGER WITH OPTIMIZED STRUCTURE.
FR2967250B1 (en) * 2010-11-05 2014-12-19 Valeo Systemes Thermiques HEAT EXCHANGER WITH CONNECTING DEVICE
JP6767620B2 (en) * 2016-10-21 2020-10-14 パナソニックＩｐマネジメント株式会社 Heat exchanger and freezing system using it
CN113465416A (en) * 2020-03-30 2021-10-01 浙江三花汽车零部件有限公司 Heat exchanger

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Publication number Priority date Publication date Assignee Title
JP2737987B2 (en) * 1989-03-09 1998-04-08 アイシン精機株式会社 Stacked evaporator
DE4301629A1 (en) * 1993-01-22 1994-07-28 Behr Gmbh & Co Liq. evaporator with enhanced efficiency
GB9307212D0 (en) * 1993-04-06 1993-05-26 Gen Motors Corp U-flow evaporators for vehicle air-conditioning systems
KR100353020B1 (en) * 1993-12-28 2003-01-10 쇼와 덴코 가부시키가이샤 Multilayer Heat Exchanger
JPH0886536A (en) * 1994-09-14 1996-04-02 Zexel Corp Expansion valve mounting member
FR2747462B1 (en) 1996-04-16 1998-06-12 Valeo Climatisation PRESSURE RESISTANT STACKED POCKET EVAPORATOR
JPH10281691A (en) * 1997-03-31 1998-10-23 Zexel Corp Lamination type heat exchanger
DE69815616T2 (en) * 1997-09-24 2004-05-13 Showa Denko K.K. Evaporator

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FR2826438B1 (en) 2004-01-23
EP1271083A2 (en) 2003-01-02
DE60213717D1 (en) 2006-09-21
ES2273946T3 (en) 2007-05-16
DE60213717T2 (en) 2007-08-30
FR2826438A1 (en) 2002-12-27
US6585038B2 (en) 2003-07-01
JP2003050062A (en) 2003-02-21
US20020195236A1 (en) 2002-12-26
EP1271083A3 (en) 2003-06-04
ATE335973T1 (en) 2006-09-15

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