WO2007048888A1 - Heat exchanger with flat twisted tubes - Google Patents

Heat exchanger with flat twisted tubes Download PDF

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Publication number
WO2007048888A1
WO2007048888A1 PCT/FR2006/001828 FR2006001828W WO2007048888A1 WO 2007048888 A1 WO2007048888 A1 WO 2007048888A1 FR 2006001828 W FR2006001828 W FR 2006001828W WO 2007048888 A1 WO2007048888 A1 WO 2007048888A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
tubes
slot
exchanger according
length
Prior art date
Application number
PCT/FR2006/001828
Other languages
French (fr)
Inventor
Wei Dan
Original Assignee
Valeo Systemes Thermiques
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
Priority claimed from FR0511138A external-priority patent/FR2887973B1/en
Application filed by Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2007048888A1 publication Critical patent/WO2007048888A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • 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
    • F28F9/0243—Header boxes having a circular cross-section
    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/185—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding with additional preformed parts

Definitions

  • the invention relates to a heat exchanger comprising a multiplicity of flat tubes each having two main faces which extend substantially in planes over most of the length of the tube, the tubes being mutually aligned in a longitudinal direction perpendicular to said planes and an end region of each of them being twisted to engage a slot formed through the substantially tubular wall of a manifold, which slot is not parallel to said planes.
  • the end regions of the tubes may engage, either in individual slots, either in a longitudinal slot common to several tubes.
  • individual slots are oriented obliquely and aligned in a pitch less than their length.
  • the tubes are thus also aligned at the same pitch, less than the length of their cross section.
  • individual slots are oriented in the longitudinal direction and are separated from each other by wall portions of the box. The pitch of the slots and tubes is therefore greater than the length of the slots and the cross section of the tubes.
  • the end regions of the tubes are contiguously arranged in a common slot, at a pitch equal to the length of the cross section of the tubes.
  • the object of the invention is to overcome this constraint, thus enabling a less expensive manufacture of the heat exchanger.
  • the invention aims in particular at a heat exchanger of the kind defined in the introduction, in which the end regions engage in a longitudinal slot common to several tubes, and provides means for establishing a tube alignment pitch different from the length of their cross section over said major part of their length.
  • the "alignment pitch of the tubes” corresponds to the distance between two opposite edges of contiguous tubes at the ends of said tubes inserted / fixed in a manifold.
  • Said slot extends over the entire length of the manifold.
  • the collector box comprises a rolled sheet metal part in a substantially tubular form, two opposite edges rectilinear facing each other by delimiting between them said slot.
  • Said end regions are contiguously disposed in said slot and are further deformed so that the length of their cross section is different from the length of the cross-section of the tubes over said major part of their length.
  • the said end regions are deformed by shrinking to have a cross section shorter than the cross section of the tubes on the major part of their length.
  • Said insert is a ring surrounding said substantially tubular wall.
  • Said insert is in the form of a comb, each tooth of the comb penetrating into the region of said slot between two adjacent tubes.
  • the teeth of the comb are interconnected by at least one longitudinal shaft offset laterally relative to the slot.
  • the comb-shaped piece is formed of a sheet metal strip cut and folded.
  • the sheet metal strip is folded substantially at right angles along a single fold line to form an L-shaped profile whose branches define the teeth and the shaft respectively.
  • the sheet metal strip is folded along three fold lines defining four bays to form a T-shaped profile whose transverse bar, formed by the alignment of the two marginal bays, defines the shaft and whose leg, formed by the superposition of the two median spans, defines the teeth.
  • the tubes have a rectangular cross section.
  • the manifold comprises at least one wall essentially tubular through which is formed a longitudinal slot and from which a rim, aligned with one side of the slot, protrudes ra- dialement to 1 outside ,
  • the manifold comprises at least one substantially tubular wall through which is formed a longitudinal slot and in which are formed two longitudinal grooves s Opening facing each other on either side of said slits a longitudinal slot and from which a flange, aligned with one side of the slot, projects radially outwardly, or, alternatively, in which are provided two longitudinal grooves opening to one another on both sides of said slot.
  • the invention also relates to a collector box suitable to be part of a heat exchanger.
  • FIG. 1 is a perspective view partially showing a manifold whose substantially tubular wall is traversed by a continuous longitudinal slot, and a flat tube having an end region rotated by 90 ° by twist, intended to be assembled by soldering to form a heat exchanger according to the invention, shown in Figures 3 to 5.
  • Figure 2 is a partial elevational view of the tube of Figure 1 before torsion.
  • Figure 3 is a partial elevational view of a heat exchanger according to the invention, showing partially a header and several consecutive tubes.
  • FIG. 4 is a sectional view along line IV - IV of FIG. 3.
  • Figure 5 is a sectional view along the line V-V of Figure 3.
  • Figures 6 to 8 are views similar to Figures 3 to 5 respectively, relating to another heat exchanger according to the invention.
  • Figures 9 and 10 are partial perspective views of a heat exchanger according to the invention having a comb-shaped insert.
  • FIGS 11 and 12 are partial perspective views of a heat exchanger according to the invention having two comb-shaped inserts.
  • Figures 13 and 14 are partial perspective views showing two successive stages of the manufacture of a comb-shaped part for the exchangers of Figures 9 to 12.
  • Figures 15 and 16 are partial perspective views of a heat exchanger according to the invention comprising a comb-shaped insert with a T-profile.
  • Figures 17 and 18 are views similar to Figures 13 and 14 respectively, relating to the comb-shaped part of the exchanger of Figures 15 and 16.
  • the heat exchangers shown in the drawings are intended more particularly, though not exclusively, for use in the automotive industry as gas cooler in which circulates a refrigerant working at high pressures such as CO 2 .
  • the substantially tubular wall 1 shown in FIG. 1, traversed by a longitudinal slot 2, is advantageously formed by rolling a sheet, for example made of aluminum alloy, so as to bring opposite two opposite edges 3 and 4 for delimiting slot 2.
  • substantially tubular refers here to a tubular configuration, excluding the continuous slot that creates an opening in the cross section of the wall, while the cross section of a tubular wall in the strict sense is closed.
  • the flat tube 5 of rectangular cross-section also shown in FIG. 1 has two main faces which, over most of the length of the tube, extend substantially in parallel planes whose mutual distance, which defines the thickness of the tube , is substantially equal to the width of the slot 2.
  • the main walls of the tube are interconnected by partitions 6 defining longitudinal channels 7 for the circulation of a fluid, including COa.
  • FIG. 1 also shows that an end region 9 of the tube 5 is twisted by 90 ° about the median longitudinal axis 8 of the tube so that its cross section is oriented perpendicularly to the aforementioned planes of the faces main.
  • the end region 9 of the tube when the end region 9 of the tube is inserted in the slot 2, said planes are perpendicular to the longitudinal axis 10 of the manifold, that is to say perpendicular to the direction of alignment of the tubes, to allow conventionally the circulation of a fluid such as air to be cooled between the tubes, perpendicular to the axis 10.
  • the tubes 5 are alternately aligned with corrugated inserts 11, the ridges waving of each interlayer coming into contact alternately with the two tubes adjacent thereto.
  • the end regions 9 of the tubes are arranged contiguously in the slot 2, the length of their cross section having been reduced by a necking operation performed before the insertion, so.
  • the pitch alignment of the tubes which is equal to the length of the cross section of the regions 9, is less than the initial length of the cross section of the tubes, which remains over most of the length thereof.
  • the result of the necking operation is shown in FIG. 2 when it is performed before twisting the tube. It can also be performed after this twist.
  • the heat exchanger shown in FIGS. 6 to 8 differs from that described above in that the end regions 9 of the tubes 5 have retained their original cross section, an increase in the pitch of alignment of the tubes with respect to their width being obtained in that the regions 9 are spaced from each other, the portions of the continuous longitudinal slot of the wall 1 not occupied by the regions 9 being closed by respective rings 20 surrounding the wall 1.
  • the heat exchanger shown partially in FIGS. 9 and 10 comprises a tubular wall 1 similar in general shape to that of the preceding embodiments, having a longitudinal slot 2 in which the end regions 9 of similar tubes engage. to those of the heat exchanger of Figures 6 to 8.
  • the regions 9 are here kept spaced from each other by the teeth 31 of a comb-shaped part 30 shown separately in Figure 14.
  • To achieve the part 30 one starts from a strip of sheet of a thickness equal to that of the tubes and to the width of the slot 2, in which one cutting from one of its longitudinal edges, rectangular notches 32 between which remain the teeth 31, as seen in Figure 13, the teeth 31 being interconnected by a shaft 33 extending along the other longitudinal edge of the strip.
  • the part 30 is then folded along a longitudinal fold line ⁇ extending between the shaft 33 on the one hand and the teeth 31 and the notches 32 on the other hand, to form an L-shaped profile, one of the branches of the L defining the teeth 31 and the other branch defining the shaft 33, as seen in Figure 14.
  • the shaft 33 extends laterally with respect to the slot 2 and rests on the outer surface of the tubular wall 1, while the teeth 31 penetrate the slot 2, together with the regions 9 of the tubes.
  • the tubular wall 1 has a rim 34 protruding radially outwards and extending along the regions 9. After assembly, the rim 34 is deformed at intervals. means of a tool to make it penetrate between the tubes and thus immobilize the piece 30 by crimping before the final connection of the assembly by brazing.
  • FIGS. 11 and 12 partially show a cylindrical wall 41 of collecting box having a cross-section in the form of 8, this cylindrical wall thus forming two tubular walls having a common portion and each delimiting a fluid chamber 36.
  • each of the chambers 36 is associated with a slot 2 in which the regions 9 of identical tubes to those of the embodiment of Figures 9 and 10 and the teeth of a comb 30 identical to that of Figure 14.
  • the two slots 2 s' extend in planes parallel to each other, the shafts 33 of the two combs being turned toward each other, their free edges resting on radial appendages 37 of the wall 35. Edges 34 similar to that of FIGS. 10 extending opposite the poles 33 relative to the slots 2, serve crimping.
  • the heat exchanger partially shown in FIGS. 15 and 16 again comprises a single manifold tubular wall 1 associated with a single row of tubes whose end regions 9 engage in a longitudinal slot 2 of the wall 1.
  • the regions 9 are kept spaced apart from each other by the teeth 41 of a comb-shaped insert 40, shown separately in Figure 18.
  • To produce the piece 40 one starts from a strip of sheet metal to the inside which rectangular openings 42, as shown in FIG. 17, are cut in order to obtain a ladder-shaped blank.
  • This blank is then folded at 180 ° along a median longitudinal fold line ⁇ i to bring the two halves of each "bar" of the ladder in mutual superposition and thus form the teeth 41, and at 90 ° along two fold lines.
  • longitudinals ⁇ 2 each extending between one of the "uprights" 43 and “bars" of the ladder so as to bring the two uprights in the same plane perpendicular to the plane of the teeth 41 and on either side of this one, to form the shaft.
  • the two flanges 43 of the shaft of the comb 40 penetrate into grooves 44 formed in the tubular wall 1.
  • Each tooth 41 being formed by the superposition of two thicknesses of sheet, the thickness of the strip of starting sheet is equal to half the width of the slot 2 and the thickness of the tubes.
  • the seal between the inside of the header and the channels 7 on the one hand and the outside on the other hand can be ensured by melting a soldering material. covering all or part of the surfaces of the manifold, tubes and optionally the one or more inserts, brazing material which also serves to mechanically fasten these components.
  • Modifications may be made to the embodiments described and shown without departing from the scope of the invention.
  • the substantially tubular wall may have a slot obtained by forming a closed tubular wall, which may extend over only a portion of the length of the tube. the manifold, or two or more slits extending respectively over different parts of the length of the box and each receiving the end regions of several tubes.
  • each of the rings 20 can be replaced by an insert only partially surrounding the wall 1.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention concerns a heat exchanger wherein the end regions (9) of the tubes, rotated at 90° about longitudinal axes thereof, are engaged in a common longitudinal slot of the manifold (1). The teeth (31) of a comb-shaped mounted part space apart said regions (9) from one another to increase the alignment pitch of the tubes relative to their width. The invention is applicable to CO2 gas coolers in the automotive industry.

Description

Échangeur de chaleur à tubes plats déformés par torsionTorsionally deformed flat tube heat exchanger
L ' invention concerne un échangeur de chaleur comprenant une multiplicité de tubes plats présentant chacun deux faces principales qui s'étendent sensiblement selon des plans sur la majeure partie de la longueur du tube, les tubes étant mutuellement alignés dans une direction longitudinale per- pendiculaire auxdits plans et une région d'extrémité de chacun d'eux étant déplacée par torsion pour s'engager dans une fente formée à travers la paroi essentiellement tubu- laire d'une boîte collectrice, cette fente n'étant pas parallèle auxdits plans .The invention relates to a heat exchanger comprising a multiplicity of flat tubes each having two main faces which extend substantially in planes over most of the length of the tube, the tubes being mutually aligned in a longitudinal direction perpendicular to said planes and an end region of each of them being twisted to engage a slot formed through the substantially tubular wall of a manifold, which slot is not parallel to said planes.
Un tel échangeur de chaleur est utilisé notamment dans l'industrie automobile, et est décrit en particulier dans EP 0 845 647 A. Dans ce document, les régions d'extrémité des tubes peuvent s'engager, soit dans des fentes indivi- duelles, soit dans une fente longitudinale commune à plusieurs tubes. Dans un exemple, des fentes individuelles sont orientées obliquement et alignées selon un pas inférieur à leur longueur. Les tubes sont donc eux aussi alignés selon ce même pas, inférieur à la longueur de leur section trans- versale. Dans un autre exemple, des fentes individuelles sont orientées dans la direction longitudinale et sont séparées les unes des autres par des portions de paroi de la boîte. Le pas des fentes et des tubes est donc supérieur à la longueur des fentes et de la section transversale des tubes. Dans un autre exemple enfin, les régions d'extrémité des tubes sont disposées de manière jointive dans une fente commune, selon un pas égal à la longueur de la section transversale des tubes .Such a heat exchanger is used in particular in the automotive industry, and is described in particular in EP 0 845 647 A. In this document, the end regions of the tubes may engage, either in individual slots, either in a longitudinal slot common to several tubes. In one example, individual slots are oriented obliquely and aligned in a pitch less than their length. The tubes are thus also aligned at the same pitch, less than the length of their cross section. In another example, individual slots are oriented in the longitudinal direction and are separated from each other by wall portions of the box. The pitch of the slots and tubes is therefore greater than the length of the slots and the cross section of the tubes. In another example, the end regions of the tubes are contiguously arranged in a common slot, at a pitch equal to the length of the cross section of the tubes.
Ainsi, dans 1 ' échangeur connu, si on veut choisir le pas d ' alignement des tubes indépendamment de la longueur de leur section transversale, il est nécessaire d'insérer leurs régions d'extrémité dans des fentes individuelles, ce qui oblige à usiner dans la boîte collectrice autant de fentes qu'il y a de tubes.Thus, in the known exchanger, if it is desired to choose the alignment pitch of the tubes regardless of the length of their cross section, it is necessary to insert their end regions into individual slots, which requires machining in the collector box as many slots as there are tubes.
Le but de l'invention est de s'affranchir de cette contrain- te, permettant ainsi une fabrication moins coûteuse de 1 ' échangeur de chaleur .The object of the invention is to overcome this constraint, thus enabling a less expensive manufacture of the heat exchanger.
L'invention vise notamment un échangeur de chaleur du genre défini en introduction, dans lequel les régions d'extrémité s'engagent dans une fente longitudinale commune à plusieurs tubes, et prévoit des moyens pour établir un pas d'alignement des tubes différent de la longueur de leur section transversale sur ladite majeure partie de leur longueur.The invention aims in particular at a heat exchanger of the kind defined in the introduction, in which the end regions engage in a longitudinal slot common to several tubes, and provides means for establishing a tube alignment pitch different from the length of their cross section over said major part of their length.
Le « pas d'alignement des tubes » correspond à la distance entre deux bords opposés de tubes contigus au niveau des extrémités desdits tubes insérées/fixées dans un collecteur.The "alignment pitch of the tubes" corresponds to the distance between two opposite edges of contiguous tubes at the ends of said tubes inserted / fixed in a manifold.
Des caractéristiques optionnelles de l'invention, complémentaires ou de substitution, sont énoncées ci-après:Optional features of the invention, complementary or substitution, are set out below:
- Ladite fente est commune à tous les tubes associés à une même boîte collectrice .- Said slot is common to all the tubes associated with the same manifold.
- Ladite fente s ' étend sur toute la longueur de la boîte collectrice.Said slot extends over the entire length of the manifold.
- La boîte collectrice comprend une pièce en tôle roulée sous une forme essentiellement tubulaire, dont deux bords opposés rectilignes viennent en regard l'un de l'autre en délimitant entre eux ladite fente.- The collector box comprises a rolled sheet metal part in a substantially tubular form, two opposite edges rectilinear facing each other by delimiting between them said slot.
- Lesdites régions d'extrémité sont disposées de manière jointive dans ladite fente et sont en outre déformées pour que la longueur de leur section transversale soit différente de la longueur de la section transversale des tubes sur ladite majeure partie de leur longueur. - Lesdites régions d'extrémité sont déformées par rétreinte pour présenter une section transversale moins longue que la section transversale des tubes sur ladite majeure partie de leur longueur .Said end regions are contiguously disposed in said slot and are further deformed so that the length of their cross section is different from the length of the cross-section of the tubes over said major part of their length. - The said end regions are deformed by shrinking to have a cross section shorter than the cross section of the tubes on the major part of their length.
- Lesdites régions d'extrémité sont déformées par évasement pour présenter une section transversale plus longue que la section transversale des tubes sur ladite majeure partie de leur longueur .- Said end regions are deformed by flaring to have a cross section longer than the cross section of the tubes over said major part of their length.
- Lesdites régions d ' extrémité sont écartées les unes des autres dans ladite fente, cette dernière étant obturée de manière étanche entre deux tubes consécutifs par une pièce rapportée .- Said end regions are spaced from each other in said slot, the latter being closed sealingly between two consecutive tubes by an insert.
- Ladite pièce rapportée est une bague entourant ladite paroi essentiellement tubulaire .Said insert is a ring surrounding said substantially tubular wall.
- Ladite pièce rapportée est en forme de peigne, chaque dent du peigne pénétrant dans la région de ladite fente comprise entre deux tubes voisins .Said insert is in the form of a comb, each tooth of the comb penetrating into the region of said slot between two adjacent tubes.
- Les dents du peigne sont reliées entre elles par au moins une hampe longitudinale décalée latéralement par rapport à la fente.- The teeth of the comb are interconnected by at least one longitudinal shaft offset laterally relative to the slot.
- La pièce en forme de peigne est formée d'une bande de tôle découpée et pliée.- The comb-shaped piece is formed of a sheet metal strip cut and folded.
- La bande de tôle est pliée sensiblement à angle droit selon une ligne de pliage unique pour former un profil en L dont les branches définissent les dents et la hampe respectivement .- The sheet metal strip is folded substantially at right angles along a single fold line to form an L-shaped profile whose branches define the teeth and the shaft respectively.
- La bande de tôle est pliée selon trois lignes de pliage délimitant quatre travées pour former un profil en T dont la barre transversale, formée par l'alignement des deux travées marginales, définit la hampe et dont la jambe, formée par la superposition des deux travées médianes, définit les dents. - Les tubes ont une section transversale rectangulaire .- The sheet metal strip is folded along three fold lines defining four bays to form a T-shaped profile whose transverse bar, formed by the alignment of the two marginal bays, defines the shaft and whose leg, formed by the superposition of the two median spans, defines the teeth. - The tubes have a rectangular cross section.
- La boite collectrice comprend au moins' une paroi essen- tiellement tubulaire à travers laquelle est formée une fente longitudinale et à partir de laquelle un rebord , aligné avec l'un des côtés de la fente, fait saillie ra- dialement vers 1 ' extérieur ,- The manifold comprises at least one wall essentially tubular through which is formed a longitudinal slot and from which a rim, aligned with one side of the slot, protrudes ra- dialement to 1 outside ,
- La boite collectrice comprend au moins une paroi essentiellement tubulaire à travers laquelle est formée une fente longitudinale et dans laquelle sont ménagées deux rainures longitudinales s Ouvrant en vis-à-vis l'une de l ' autre de part et d ' autre de ladite fente une fente lon- gitudinale et à partir de laquelle un rebord, aligné avec l'un des côtés de la fente, fait saillie radialement vers l'extérieur, ou, en variante, dans laquelle sont ménagées deux rainures longitudinales s ' ouvrant en vis-à-vis l'une de l'autre de part et d'autre de ladite fente.- The manifold comprises at least one substantially tubular wall through which is formed a longitudinal slot and in which are formed two longitudinal grooves s Opening facing each other on either side of said slits a longitudinal slot and from which a flange, aligned with one side of the slot, projects radially outwardly, or, alternatively, in which are provided two longitudinal grooves opening to one another on both sides of said slot.
L'invention a également pour objet une boîte collectrice propre à faire partie d'un échangeur de chaleur.The invention also relates to a collector box suitable to be part of a heat exchanger.
Les caractéristiques et avantages de '1 ' invention sont expo- ses plus en détail dans la description ci-après, avec référence aux dessins annexés .The features and advantages of '1' invention are its expo- in more detail in the description below, with reference to the accompanying drawings.
La figure 1 est une vue en perspective montrant en partie une boîte collectrice dont la paroi essentiellement tubu- laire est traversée par une fente longitudinale continue, et un tube plat dont une région d'extrémité est tournée de 90° par torsion, destinés à être assemblés par brasage pour former un échangeur de chaleur selon l'invention, représenté sur les figures 3 à 5.FIG. 1 is a perspective view partially showing a manifold whose substantially tubular wall is traversed by a continuous longitudinal slot, and a flat tube having an end region rotated by 90 ° by twist, intended to be assembled by soldering to form a heat exchanger according to the invention, shown in Figures 3 to 5.
La figure 2 est une vue partielle en élévation du tube de la figure 1 avant torsion. La figure 3 est une vue partielle en élévation d'un échan- geur de • chaleur selon l'invention, montrant partiellement une boîte collectrice et plusieurs tubes consécutifs.Figure 2 is a partial elevational view of the tube of Figure 1 before torsion. Figure 3 is a partial elevational view of a heat exchanger according to the invention, showing partially a header and several consecutive tubes.
La figure 4 est une vue en coupe selon la ligne IV-IV de la figure 3.FIG. 4 is a sectional view along line IV - IV of FIG. 3.
La figure 5 est une vue en coupe selon la ligne V-V de la figure 3.Figure 5 is a sectional view along the line V-V of Figure 3.
Les figures 6 à 8 sont des vues analogues aux figures 3 à 5 respectivement, relatives à un autre échangeur de chaleur selon l'invention.Figures 6 to 8 are views similar to Figures 3 to 5 respectively, relating to another heat exchanger according to the invention.
Les figures 9 et 10 sont des vues partielles en perspective d'un échangeur de chaleur selon l'invention comportant une pièce rapportée en forme de peigne .Figures 9 and 10 are partial perspective views of a heat exchanger according to the invention having a comb-shaped insert.
Les figures 11 et 12 sont des vues partielles en perspective d'un échangeur de chaleur selon l'invention comportant deux pièces rapportées en forme de peigne.Figures 11 and 12 are partial perspective views of a heat exchanger according to the invention having two comb-shaped inserts.
Les figures 13 et 14 sont des vues partielles en perspective montrant deux stades successifs de la fabrication d'une pièce en forme de peigne pour les échangeurs des figures 9 à 12.Figures 13 and 14 are partial perspective views showing two successive stages of the manufacture of a comb-shaped part for the exchangers of Figures 9 to 12.
Les figures 15 et 16 sont des vues partielles en perspective d'un échangeur de chaleur selon l'invention comportant une pièce rapportée en forme de peigne à profil en T.Figures 15 and 16 are partial perspective views of a heat exchanger according to the invention comprising a comb-shaped insert with a T-profile.
Les figures 17 et 18 sont des vues analogues aux figures 13 et 14 respectivement, relatives à la pièce en forme de peigne de l' échangeur des figures 15 et 16.Figures 17 and 18 are views similar to Figures 13 and 14 respectively, relating to the comb-shaped part of the exchanger of Figures 15 and 16.
Les échangeurs de chaleur représentés sur les dessins sont destinés plus particulièrement, bien que non exclusivement, à être utilisés dans 1 ' industrie automobile en tant que refroidisseur de gaz dans lequel circule un fluide réfrigérant travaillant à des pressions élevées tel que CO2.The heat exchangers shown in the drawings are intended more particularly, though not exclusively, for use in the automotive industry as gas cooler in which circulates a refrigerant working at high pressures such as CO 2 .
La paroi essentiellement tubulaire 1 représentée sur la figure 1, traversée par une fente longitudinale 2, est avantageusement formée par roulage d'une tôle, par exemple en alliage d'aluminium, de manière à amener en vis-à-vis deux bords opposés 3 et 4 pour délimiter la fente 2. L'expression "essentiellement tubulaire" se réfère ici à une configuration tubulaire, compte non tenu de la fente continue qui crée une ouverture dans la section transversale de la paroi, alors que- la section transversale d'une paroi tubulaire au sens strict est fermée.The substantially tubular wall 1 shown in FIG. 1, traversed by a longitudinal slot 2, is advantageously formed by rolling a sheet, for example made of aluminum alloy, so as to bring opposite two opposite edges 3 and 4 for delimiting slot 2. The term "substantially tubular" refers here to a tubular configuration, excluding the continuous slot that creates an opening in the cross section of the wall, while the cross section of a tubular wall in the strict sense is closed.
Le tube plat 5 de section transversale rectangulaire également représenté sur la figure 1 présente deux faces principales qui, sur la majeure partie de la longueur du tube, s ' étendent sensiblement selon des plans parallèles dont la distance mutuelle, qui définit l'épaisseur du tube, est sensiblement égale à la largeur de la fente 2. De façon connue, les parois principales du tube sont reliées entre elles par des cloisons 6 délimitant des canaux longitudinaux 7 pour la circulation d'un fluide, notamment COa . On voit également sur la figure 1 qu'une région d'extrémité 9 du tube 5 est tournée de 90° par torsion autour de l'axe longitudinal médian 8 du tube de telle manière que sa section transversale est orientée perpendiculairement aux plans précités des faces principales. Ainsi, lorsque la région d'extrémité 9 du tube est insérée dans la fente 2, lesdits plans sont perpendiculaires à l'axe longitudinal 10 de la boîte collectrice, c'est-à-dire perpendiculaires à la direction d'alignement des tubes, pour permettre de manière classique la circulation d'un fluide tel que de l'air à refroidir entre les tubes, perpendiculairement à l'axe 10. De manière classique également, les tubes 5 sont alignés en alternance avec des intercalaires ondulés 11, les crêtes d'ondulation de chaque intercalaire venant en contact alternativement avec les deux tubes adjacents à celui-ci. Selon l'invention, les régions d'extrémité 9 des tubes sont disposées de manière jointive dans la fente 2, la longueur de leur section transversale ayant été réduite par une opération de rétreinte réalisée avant l'insertion, de telle sorte . que le pas d'alignement des tubes, qui est égal à la longueur de la section transversale des régions 9, est inférieur à la longueur initiale de la section transversale des tubes, qui subsiste sur la majeure partie de la longueur de ceux-ci . Le résultat de 1 ' opération de rétreinte est montré sur la figure 2, lorsqu'elle est effectuée avant la torsion du tube. Elle peut également être effectuée après cette torsion.The flat tube 5 of rectangular cross-section also shown in FIG. 1 has two main faces which, over most of the length of the tube, extend substantially in parallel planes whose mutual distance, which defines the thickness of the tube , is substantially equal to the width of the slot 2. In known manner, the main walls of the tube are interconnected by partitions 6 defining longitudinal channels 7 for the circulation of a fluid, including COa. FIG. 1 also shows that an end region 9 of the tube 5 is twisted by 90 ° about the median longitudinal axis 8 of the tube so that its cross section is oriented perpendicularly to the aforementioned planes of the faces main. Thus, when the end region 9 of the tube is inserted in the slot 2, said planes are perpendicular to the longitudinal axis 10 of the manifold, that is to say perpendicular to the direction of alignment of the tubes, to allow conventionally the circulation of a fluid such as air to be cooled between the tubes, perpendicular to the axis 10. In a conventional manner also, the tubes 5 are alternately aligned with corrugated inserts 11, the ridges waving of each interlayer coming into contact alternately with the two tubes adjacent thereto. According to the invention, the end regions 9 of the tubes are arranged contiguously in the slot 2, the length of their cross section having been reduced by a necking operation performed before the insertion, so. that the pitch alignment of the tubes, which is equal to the length of the cross section of the regions 9, is less than the initial length of the cross section of the tubes, which remains over most of the length thereof. The result of the necking operation is shown in FIG. 2 when it is performed before twisting the tube. It can also be performed after this twist.
Si, au lieu d'une rétreinte, on réalise un évasement pour allonger la section transversale des régions d'extrémité des tubes, il en résultera au contraire un pas d'alignement des tubes supérieur à leur largeur.If, instead of a constriction, a flare is made to lengthen the cross-section of the end regions of the tubes, the result will be an alignment pitch of the tubes greater than their width.
L ' échangeur de chaleur représenté sur les figures 6 à 8 diffère de celui décrit précédemment en ce que les régions d'extrémité 9 des tubes 5 ont conservé leur section transversale d'origine, une augmentation du pas d'alignement des tubes par rapport à leur largeur étant obtenue par le fait que les régions 9 sont écartées les unes des autres, les parties de la fente longitudinale continue de la paroi 1 non occupées par les régions 9 étant obturées par des bagues respectives 20 entourant la paroi 1.The heat exchanger shown in FIGS. 6 to 8 differs from that described above in that the end regions 9 of the tubes 5 have retained their original cross section, an increase in the pitch of alignment of the tubes with respect to their width being obtained in that the regions 9 are spaced from each other, the portions of the continuous longitudinal slot of the wall 1 not occupied by the regions 9 being closed by respective rings 20 surrounding the wall 1.
L ' échangeur de chaleur représenté partiellement sur les figures 9 et 10 comprend une paroi tubulaire 1 semblable dans sa forme générale à celle des modes de réalisation précédents, présentant une fente longitudinale 2 dans laquelle s'engagent les régions d'extrémité 9 de tubes semblables à ceux de 1 ' échangeur de chaleur des figures 6 à 8. Les régions 9 sont ici maintenues écartées les unes des autres par les dents 31 d'une pièce en forme de peigne 30 représentée séparément sur la figure 14. Pour réaliser la pièce 30, on part d'une bande de tôle d'une épaisseur égale à celle des tubes et à la largeur de la fente 2 , dans laquelle on découpe, à partir de l'un de ses bords longitudinaux, des encoches rectangulaires 32 entre lesquelles subsistent les dents 31, comme on le voit sur la figure 13, les dents 31 étant reliées entre elles par une hampe 33 s 'étendant le long de l'autre bord longitudinal de la bande. On plie ensuite la pièce 30 selon une ligne de pliage longitudinale λ s ' étendant entre la hampe 33 d'une part et les dents 31 et les encoches 32 d'autre part, pour former un profil en L, l'une des branches du L définissant les dents 31 et l'autre branche définissant la hampe 33, comme on le voit sur la figure 14.The heat exchanger shown partially in FIGS. 9 and 10 comprises a tubular wall 1 similar in general shape to that of the preceding embodiments, having a longitudinal slot 2 in which the end regions 9 of similar tubes engage. to those of the heat exchanger of Figures 6 to 8. The regions 9 are here kept spaced from each other by the teeth 31 of a comb-shaped part 30 shown separately in Figure 14. To achieve the part 30 , one starts from a strip of sheet of a thickness equal to that of the tubes and to the width of the slot 2, in which one cutting from one of its longitudinal edges, rectangular notches 32 between which remain the teeth 31, as seen in Figure 13, the teeth 31 being interconnected by a shaft 33 extending along the other longitudinal edge of the strip. The part 30 is then folded along a longitudinal fold line λ extending between the shaft 33 on the one hand and the teeth 31 and the notches 32 on the other hand, to form an L-shaped profile, one of the branches of the L defining the teeth 31 and the other branch defining the shaft 33, as seen in Figure 14.
Dans l ' échangeur assemblé, comme représenté sur les figures 9 et 10, la hampe 33 s'étend latéralement par rapport à la fente 2 et s'appuie sur la surface extérieure de la paroi tubulaire 1, tandis que les dents 31 pénètrent dans la fente 2, conjointement avec les régions 9 des tubes. À l'opposé de la hampe 33 par rapport à la fente 2, la paroi tubulaire 1 présente un rebord 34 faisant saillie radialement vers l'extérieur et s ' étendant le long des régions 9. Après assemblage, on déforme ponctuellement le rebord 34 au moyen d'un outil pour le faire pénétrer entre les tubes et immobiliser ainsi la pièce 30 par sertissage avant la liaison définitive de l ' ensemble par brasage .In the assembled exchanger, as shown in FIGS. 9 and 10, the shaft 33 extends laterally with respect to the slot 2 and rests on the outer surface of the tubular wall 1, while the teeth 31 penetrate the slot 2, together with the regions 9 of the tubes. Opposite the shaft 33 with respect to the slot 2, the tubular wall 1 has a rim 34 protruding radially outwards and extending along the regions 9. After assembly, the rim 34 is deformed at intervals. means of a tool to make it penetrate between the tubes and thus immobilize the piece 30 by crimping before the final connection of the assembly by brazing.
Les figures 11 et 12 représentent partiellement une paroi cylindrique 41 de boîte collectrice ayant une section transversale en forme de 8, cette paroi cylindrique formant ainsi deux parois tubulaires ayant une partie commune et délimi- tant chacune une chambre de fluide 36. À chacune des chambres 36 est associée une fente 2 dans laquelle s'engagent les régions 9 de tubes identiques à ceux du mode de réalisation des figures 9 et 10 et les dents d'un peigne 30 identiques à celui de la figure 14. Les deux fentes 2 s ' étendent selon des plans parallèles entre eux, les hampes 33 des deux peignes étant tournées l'une vers l'autre, leurs bords libres s ' appuyant sur des appendices radiaux 37 de la paroi 35. Des rebords 34 semblables à celui des figures 9 et 10, s ' étendant à l'opposé des hampes 33 par rapport aux fentes 2, servent au sertissage.FIGS. 11 and 12 partially show a cylindrical wall 41 of collecting box having a cross-section in the form of 8, this cylindrical wall thus forming two tubular walls having a common portion and each delimiting a fluid chamber 36. In each of the chambers 36 is associated with a slot 2 in which the regions 9 of identical tubes to those of the embodiment of Figures 9 and 10 and the teeth of a comb 30 identical to that of Figure 14. The two slots 2 s' extend in planes parallel to each other, the shafts 33 of the two combs being turned toward each other, their free edges resting on radial appendages 37 of the wall 35. Edges 34 similar to that of FIGS. 10 extending opposite the poles 33 relative to the slots 2, serve crimping.
L'échangeur de chaleur partiellement représenté sur les figures 15 et 16 comprend de nouveau une paroi tubulaire de boîte collectrice simple 1 associée à une rangée unique de tubes dont les régions d'extrémités 9 s'engagent dans une fente longitudinale 2 de la paroi 1. Les régions 9 sont maintenues écartées les unes des autres par les dents 41 d'une pièce rapportée en forme de peigne 40, représentées séparément sur la figure 18. Pour réaliser la pièce 40, on part d'une bande de tôle à l'intérieur de laquelle on découpe des ouvertures rectangulaires 42 , comme montré sur la figure 17, de manière à obtenir un flan en forme d'échelle. On plie ensuite, ce flan à 180° selon une ligne de pliage longitudinale médiane λi pour amener les deux moitiés de chaque "barreau" de l'échelle en superposition mutuelle et former ainsi les dents 41, et à 90° selon deux lignes de pliage longitudinales λ2 s 'étendant chacune entre l'un des "montants" 43 et les "barreaux" de l'échelle de manière à amener les deux montants dans un même plan perpendiculaire au plan des dents 41 et de part et d'autre de celui-ci, pour former la hampe .The heat exchanger partially shown in FIGS. 15 and 16 again comprises a single manifold tubular wall 1 associated with a single row of tubes whose end regions 9 engage in a longitudinal slot 2 of the wall 1. The regions 9 are kept spaced apart from each other by the teeth 41 of a comb-shaped insert 40, shown separately in Figure 18. To produce the piece 40, one starts from a strip of sheet metal to the inside which rectangular openings 42, as shown in FIG. 17, are cut in order to obtain a ladder-shaped blank. This blank is then folded at 180 ° along a median longitudinal fold line λi to bring the two halves of each "bar" of the ladder in mutual superposition and thus form the teeth 41, and at 90 ° along two fold lines. longitudinals λ 2 each extending between one of the "uprights" 43 and "bars" of the ladder so as to bring the two uprights in the same plane perpendicular to the plane of the teeth 41 and on either side of this one, to form the shaft.
Dans l'échangeur de chaleur assemblé, les deux ailes 43 de la hampe du peigne 40 pénètrent dans des rainures 44 ménagées dans la paroi tubulaire 1. Chaque dent 41 étant formée par la superposition de deux épaisseurs de tôle, l'épaisseur de la bande de tôle de départ est égale à la moitié de la largeur de la fente 2 et de l'épaisseur des tubes.In the assembled heat exchanger, the two flanges 43 of the shaft of the comb 40 penetrate into grooves 44 formed in the tubular wall 1. Each tooth 41 being formed by the superposition of two thicknesses of sheet, the thickness of the strip of starting sheet is equal to half the width of the slot 2 and the thickness of the tubes.
De manière classique, dans les échangeurs de chaleur décrits, 1 ' étanchéité entre l'intérieur de la boîte collectrice et des canaux 7 d'une part et l'extérieur d'autre part peut être assurée par la fusion d'un matériau de brasage recouvrant tout ou partie des surfaces de la boîte collectrice, des tubes et le cas échéant de la ou des pièces rapportées , matériau de brasage qui sert également à la solidarisation mécanique de ces composants . Des modifications peuvent être apportées aux modes de réalisation décrits et représentés sans sortir du cadre de 1 ' invention. Ainsi, au lieu d'une fente continue délimitée par des bords opposés d'une tôle roulée, la paroi essentiellement tubulaire peut présenter une fente obtenue par façonnage d'une paroi tubulaire fermée, pouvant s'étendre sur une partie seulement de la longueur de la boîte collectrice, ou deux fentes ou plus s ' étendant respectivement sur des par- ties différentes de la longueur de la boîte et recevant chacune les régions d'extrémité de plusieurs tubes. Par ailleurs, chacune des bagues 20 peut être remplacée par une pièce rapportée n'entourant que partiellement la paroi 1. Conventionally, in the heat exchangers described, the seal between the inside of the header and the channels 7 on the one hand and the outside on the other hand can be ensured by melting a soldering material. covering all or part of the surfaces of the manifold, tubes and optionally the one or more inserts, brazing material which also serves to mechanically fasten these components. Modifications may be made to the embodiments described and shown without departing from the scope of the invention. Thus, instead of a continuous slot delimited by opposite edges of a rolled sheet, the substantially tubular wall may have a slot obtained by forming a closed tubular wall, which may extend over only a portion of the length of the tube. the manifold, or two or more slits extending respectively over different parts of the length of the box and each receiving the end regions of several tubes. Moreover, each of the rings 20 can be replaced by an insert only partially surrounding the wall 1.

Claims

Revendications claims
1. Échangeur de chaleur comprenant une multiplicité de tubes plats (5) présentant chacun deux faces principales qui s'étendent sensiblement selon des plans sur la majeure partie de la longueur du tube, les tubes étant mutuellement alignés dans une direction longitudinale perpendiculaire auxdits plans et une région d'extrémité "(9) de chacun d'eux étant déplacée par torsion pour s ' étendre dans la direction longitudinale et s'engager dans une fente longitudinale (2), commune à plusieurs tubes, formée à travers la paroi (1) essentiellement tubulaire d'une boîte collectrice, caractérisé en ce que des moyens sont prévus pour établir un pas (P) d'alignement des tubes différent de la longueur de leur section transversale sur ladite majeure partie de leur longueur .A heat exchanger comprising a multiplicity of flat tubes (5) each having two main faces which extend substantially in planes over most of the length of the tube, the tubes being mutually aligned in a longitudinal direction perpendicular to said planes and an end region " (9) of each of them being displaced by torsion to extend in the longitudinal direction and engage in a longitudinal slot (2), common to several tubes, formed through the wall (1 ) substantially tubular of a manifold, characterized in that means are provided for establishing a pitch (P) of alignment of the tubes different from the length of their cross section over said major part of their length.
2. Échangeur de chaleur selon la revendication 1, dans lequel ladite fente (2) est commune à tous les tubes asso- ciés à une même boîte collectrice.2. Heat exchanger according to claim 1, wherein said slot (2) is common to all the tubes associated with the same manifold.
3. Échangeur de chaleur selon la revendication 2 , dans lequel ladite fente (2) s'étend sur toute la longueur de la boîte collectrice.3. Heat exchanger according to claim 2, wherein said slot (2) extends over the entire length of the manifold.
4. Échangeur de chaleur selon la revendication 3 , dans lequel la boîte collectrice comprend une pièce en tôle (1) roulée sous une forme essentiellement tubulaire, dont deux bords opposés rectilignes (3, 4) viennent en regard l'un de l'autre en délimitant entre eux ladite fente (2) .4. heat exchanger according to claim 3, wherein the manifold comprises a sheet metal part (1) rolled in a substantially tubular form, two opposite edges rectilinear (3, 4) are opposite one another delimiting between them said slot (2).
5. Échangeur de chaleur selon l ' une des revendications précédentes, dans lequel lesdites régions d'extrémité (9) sont disposées de manière jointive dans ladite fente et sont en outre déformées pour que la longueur de leur section transversale soit différente de la longueur de la section transversale des tubes sur ladite majeure partie de leur longueur . 5. Heat exchanger according to one of the preceding claims, wherein said end regions (9) are contiguously disposed in said slot and are further deformed so that the length of their cross-section is different from their length. the cross section of the tubes over the major part of their length.
6. Échangeur de chaleur selon la revendication 5 , dans lequel lesdites régions d'extrémité (9) sont déformées par rétreinte pour présenter une section transversale moins longue que la section transversale des tubes sur ladite majeure partie de leur longueur.The heat exchanger of claim 5, wherein said end regions (9) are deformed by necking to have a cross section shorter than the cross section of the tubes over said major part of their length.
7. Échangeur de chaleur selon la revendication 5 , dans lequel lesdites régions d'extrémité sont déformées par évasement pour présenter une section transversale plus longue que la section transversale des tubes sur ladite majeure partie de leur longueur.The heat exchanger of claim 5, wherein said end regions are flared deformed to have a cross section longer than the cross section of the tubes over said major portion of their length.
8. Échangeur de chaleur selon l'une des revendications 1 à 4, dans lequel lesdites régions d'extrémité (9) sont écar- tées les unes des autres dans ladite fente (2), cette dernière étant obturée de manière étanche entre deux tubes consécutifs par une pièce rapportée (20) .8. Heat exchanger according to one of claims 1 to 4, wherein said end regions (9) are spaced from each other in said slot (2), the latter being closed sealingly between two tubes consecutive by an insert (20).
9. Échangeur de chaleur selon la revendication 8, dans lequel ladite pièce rapportée est une bague (20) entourant ladite paroi essentiellement tubulaire.9. Heat exchanger according to claim 8, wherein said insert is a ring (20) surrounding said substantially tubular wall.
10. Échangeur de chaleur selon la revendication 8, dans lequel ladite pièce rapportée (30) est en forme de peigne, chaque dent (31) du peigne pénétrant dans la région de ladite fente (2) comprise entre deux tubes voisins.10. Heat exchanger according to claim 8, wherein said insert (30) is comb-shaped, each tooth (31) of the comb penetrating the region of said slot (2) between two adjacent tubes.
11. Échangeur de chaleur selon la revendication 10, dans lequel les dents (31) du peigne (30) sont reliées entre elles par au moins une hampe longitudinale (33) décalée latéralement par rapport à la fente .11. Heat exchanger according to claim 10, wherein the teeth (31) of the comb (30) are interconnected by at least one longitudinal shaft (33) offset laterally with respect to the slot.
12. Échangeur de chaleur selon la revendication 11, dans lequel la pièce en forme de peigne (30) est formée d'une bande de tôle découpée et pliée.12. Heat exchanger according to claim 11, wherein the comb-shaped piece (30) is formed of a sheet metal strip cut and folded.
13. Échangeur de chaleur selon la revendication 12, dans lequel la bande de tôle (30) est pliée sensiblement à angle droit selon une ligne de pliage unique (X1) pour former un profil en L dont les branches définissent les dents (31) et la hampe (33) respectivement.A heat exchanger according to claim 12, wherein the sheet metal strip (30) is bent substantially at right angles along a single fold line (X 1 ) to form a L-shaped profile whose branches define the teeth (31) and the shaft (33) respectively.
14. Échangeur de chaleur selon la revendication 12, dans lequel la bande de tôle est pliée selon trois lignes de pliage (A1, X2) délimitant quatre travées pour former un profil en T dont la barre transversale, formée par l'alignement des deux travées marginales (43), définit la hampe et dont la jambe, formée par la superposition des deux travées médianes, définit les dents (41) .14. Heat exchanger according to claim 12, wherein the sheet metal strip is folded along three fold lines (A 1 , X 2 ) delimiting four bays to form a T-shaped profile whose transverse bar, formed by the alignment of two marginal bays (43), defines the shaft and whose leg, formed by the superposition of the two middle bays, defines the teeth (41).
15. Échangeur de chaleur selon l'une des revendications précédentes, dans lequel les tubes (5) ont une section transversale rectangulaire .15. Heat exchanger according to one of the preceding claims, wherein the tubes (5) have a rectangular cross section.
16. Echangeur de chaleur selon la revendication 13, dans lequel la boite collectrice comprend au moins une paroi (1) essentiellement tubulaire à travers laquelle est formée une fente longitudinale (2) et à partir de laquelle un rebord (34), aligné avec l'un des côtés de la fente, fait saillie radialement vers l ' extérieur .16. Heat exchanger according to claim 13, wherein the manifold comprises at least one substantially tubular wall (1) through which is formed a longitudinal slot (2) and from which a flange (34) aligned with the one side of the slot protrudes radially outwards.
17. Echangeur de chaleur selon la revendication 14 , lequel la boite collectrice comprend au moins une paroi (1) essen- tiellement tubulaire à travers laquelle est formée une fente longitudinale (2) et dans laquelle sont ménagées deux rainures longitudinales (44) s Ouvrant en vis-à-vis l'une de 1 ' autre de part et d ' autre de ladite fente .17. Heat exchanger according to claim 14, wherein the manifold comprises at least one essentially tubular wall (1) through which is formed a longitudinal slot (2) and in which are formed two longitudinal grooves (44). vis-à-vis one of the other on both sides of said slot.
18. Boîte collectrice propre à faire partie d'un échangeur de chaleur selon l'une des revendications précédentes. 18. Specific header box to be part of a heat exchanger according to one of the preceding claims.
PCT/FR2006/001828 2005-10-28 2006-07-26 Heat exchanger with flat twisted tubes WO2007048888A1 (en)

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FR0511138A FR2887973B1 (en) 2005-06-30 2005-10-28 HEAT EXCHANGER WITH DEFORMED FLAT TUBES BY TORSION AND COLLECTOR BOX FOR SUCH AN EXCHANGER

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EP1300644A2 (en) * 2001-10-02 2003-04-09 Behr GmbH & Co. KG Heat exchanger and process to fabricate this heat exchanger

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2968750A1 (en) * 2010-12-10 2012-06-15 Valeo Systemes Thermiques Heat-exchanger i.e. condenser, for exchanging heat between e.g. cooling fluid and water-glycol in air-conditioning circuit of motor vehicle, has covers in contact with surface of collectors in order to define chamber for fluid
FR2991760A1 (en) * 2012-06-11 2013-12-13 Valeo Systemes Thermiques Heat exchanger for heat exchange between air and glycol-water in car, has collector including branches arranged between ends of two adjacent heat exchange tubes, so that thickness of branches defines space between adjacent tubes
CN104792195A (en) * 2014-01-17 2015-07-22 马勒贝洱两合公司 Heat exchanger
EP2945217A1 (en) * 2014-05-16 2015-11-18 Valeo Klimasysteme GmbH Cooling device for a battery pack

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