EP1684041A1 - Flat tube with an insert for heat exchanger - Google Patents

Flat tube with an insert for heat exchanger Download PDF

Info

Publication number
EP1684041A1
EP1684041A1 EP06001414A EP06001414A EP1684041A1 EP 1684041 A1 EP1684041 A1 EP 1684041A1 EP 06001414 A EP06001414 A EP 06001414A EP 06001414 A EP06001414 A EP 06001414A EP 1684041 A1 EP1684041 A1 EP 1684041A1
Authority
EP
European Patent Office
Prior art keywords
insert
tube
tube according
outer casing
depressions
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.)
Withdrawn
Application number
EP06001414A
Other languages
German (de)
French (fr)
Inventor
Ronan Cozic
Frédéric MESLIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Publication of EP1684041A1 publication Critical patent/EP1684041A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • F28D1/0391—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 a single plate being bent to form one or more 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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements

Definitions

  • the invention relates to a multi-channel flat tube for the circulation of a fluid in a heat exchanger, comprising an outer envelope of closed contour and an insert housed in said outer envelope and contiguous thereto in zones extending in the longitudinal direction of the tube to define said channels and to mechanically strengthen the tube.
  • stamping By this technique, it is difficult to obtain small wall thicknesses, for example 0.2 mm, which increases the material consumption and the weight of the tubes. In addition, the machine cycle is generally slow and produces a large amount of waste. This technique is not economical.
  • the extrusion technique which is widely used, also entails limits as to the thickness of the walls, those of the partitions between channels and of the outer casing must not be less than about 0.3 mm and about 0.2 mm respectively. This technique does not make it possible to obtain tubes coated with a brazing material for their connection by brazing with a collector plate. Since the cross-section of the extruded product is constant, it is not possible either to produce local deformations during extrusion, which can improve the heat exchange.
  • tubes are known in which the outer casing and the partitions between channels are obtained by folding the same band.
  • the folding leads to a thickness of the partitions between channels greater than what is necessary for the mechanical strength of the tube.
  • Tubes are also known in which the outer envelope is formed by folding a strip, and the channels are separated from each other by an insert introduced into the envelope. In some cases, localized depressions are provided on the opposite major faces of the outer casing. This can result in a loss of contact between the tube and fins adjacent thereto in the heat exchanger.
  • the object of the invention is to overcome the drawbacks of the known tubes, and to provide a multi-channel flat tube having optimum wall thicknesses and heat exchange properties, and which can be manufactured economically.
  • the invention aims in particular at a tube of the type defined in the introduction, and provides that the insert has localized depressions and that the outer casing is free of such depressions.
  • the channels are formed by the introduction of the insert into the outer casing.
  • the partitions thus provided between the channels are formed only once and only one thickness of the sheet.
  • pressing here means deformation of the sheet by displacement of material in the direction of the thickness of the sheet, substantially with retention of the thickness and without opening formation through the sheet.
  • the invention also relates to a method for manufacturing a multi-channel flat tube for the circulation of a fluid in a heat exchanger, in which process a first continuous sheet metal strip of suitable configuration is folded simultaneously to form an outer envelope. closed contour and a second continuous sheet metal strip of appropriate configuration to form an insert, the insert being introduced into the outer casing during the folding of the first band and before closing said contour, and the continuous structure is transversely cut thus obtained in sections each constituting a multi-channel flat tube as defined above.
  • the folding of the two strips and the introduction of the insert into the outer casing are made on the same forming train.
  • Figure 1 is a cross-sectional view of a six-channel flat tube according to the invention.
  • FIG. 2 is an exploded perspective view of the tube of FIG.
  • Figures 3 and 4 are views similar to Figures 1 and 2 respectively, showing a two-channel tube according to the invention.
  • Figures 5 and 6 are views similar to Figures 1 and 2 respectively, showing a four-channel tube according to the invention.
  • Figures 7 and 8 are views similar to Figures let 2 respectively, showing a three-channel tube according to the invention.
  • the flat tube shown in FIGS. 1 and 2 intended to be associated with other similar tubes and at least one collecting box for constituting a heat exchanger, comprises an outer casing 1 conventionally formed by folding in a train of forming a first continuous strip of aluminum sheet or aluminum alloy.
  • a marginal region 2 of the strip is curved substantially in a semicircle and connects to a region 3 remained flat and constituting one of the main faces of the envelope.
  • region 3 is connected to an intermediate region 4 curved substantially in a semicircle, itself followed by a region 5 remaining flat which forms the second main face of the envelope.
  • the second marginal zone 6 of the strip, adjacent to the region 5 is curved substantially in a semicircle and externally covers the region 2.
  • the thus folded strip forms a closed contour.
  • a second continuous band is folded together with the band 1, on the same forming train, to form an insert 7 which is introduced into the envelope before closing the contour thereof.
  • a first marginal region 8 of the second band is curved substantially in a semicircle and contiguous internally to the region 4 of the first band.
  • a range 9 extending from the face 5 to the face 3 substantially in a plane having a slight inclination, of the order of 10 °, with respect to the planes of said faces.
  • the range 9 is connected to a narrow region 10 contiguous to the face 3, which itself connects to a beach 11 extending from the face 3 to the face 5 substantially in a plane perpendicular to the plane of the beach 9 and by consequently, more strongly inclined, of the order of 80 °, relative to the planes of the faces 3 and 5.
  • the range 11 is followed by a range 12 similar to the range 10, contiguous to the face 5, then by a range 13 s extending from the face 5 to the face 7, parallel to the beach 9.
  • beaches 10, 11, 12 and 13 follow the beach 9, beaches 14, 15, 16 and 17 similar to those of FIG.
  • follow the range 13 delimits the track 17 and comes into contact with the region 2 of the first band.
  • the insert 7 delimits six channels inside the envelope 1, namely a first channel 21 delimited by the face 3, the region 8 and the range 9, a second channel 22 delimited by the areas 9, 10 and 11 and the face 5, a third channel 23 delimited by the tracks 11, 12 and 13 and the face 3, a fourth channel 24 delimited by the areas 13, 14 and 15 and the face 5, a fifth channel 25 delimited by the areas 15 , 16 and 17 and the face 3 and a sixth channel 26 delimited by the track 17, the region 2 and the face 5.
  • the partitions thus provided between the channels are formed only once and only one thickness of the sheet.
  • one and / or the other of the strips used may have, on one and / or both of their faces, a coating of brazing material which will melt during a passage in the oven of the heat exchanger is completed, so as to seal the fluid circuits and strengthen the mechanical connection and thermal conduction between the various components.
  • the brazing will ensure in particular a firm connection between the marginal regions 2 and 6 of the first band and between the insert and the envelope exterior and fluid tightness between the inside and outside of the tube and between the channels.
  • each of the ranges 9, 13 and 17 of the insert has two rows of localized depressions, the term "row” here denoting a set of depressions aligned in the longitudinal direction of the tube and spaced regularly from each other.
  • a row is formed of recesses 31 whose convexity is turned towards a channel adjacent to the face 3, that is to say the channel 21, 23 or 25 as the case may be, and the other row is formed of depressions whose convexity is turned to a channel adjacent to the face 5, namely the channel 22, 24 or 26.
  • the recesses 31 and 32 are arranged in staggered rows.
  • each depression 31, 32 has substantially the shape of a bowl of revolution, and more particularly of a spherical cap.
  • the depressions may have a generally square shape, as described and shown in WO 95/05571, an elongated shape or a triangular shape, as described and shown in EP 1060808, or other forms.
  • the tube of FIGS. 1 and 2 has a width of 27 mm and a thickness of 1.5 mm, the thickness of the first band and that of the second band being 0.1 mm and 0.2 mm respectively.
  • the materials of the envelope 1 and the insert 7 may be identical or different, and are chosen independently of one another according to the desired properties.
  • the tube shown in FIGS. 3 and 4 comprises an outer casing 1 identical to that of the tube of FIGS. 1 and 2, containing an insert 41 also obtained by folding. a continuous band.
  • the insert 41 comprises a flat surface 42 and contiguous to the face 5 over the entire width thereof, subject to depressions whose arrangement will be described later.
  • the range 42 is bounded by a free edge 43 of the strip which is substantially adjacent to the free edge of the first band delimiting the marginal region 2.
  • the range 42 is followed by a region 44 curved in a semicircle and contiguous to the region 4 of the envelope 1. In the region 44 follows a beach 45, flat and contiguous to the face 3 on a little less than half the width thereof, subject to depressions whose arrangement will be described later .
  • the insert 41 also comprises a U-shaped cross-sectional area 46, placed at the mid-width of the tube, the bottom of which bears against the beach 42 and whose branches extend across the thickness of the tube. one of them connecting to the beach 45 and the other connecting to a beach 47 similar to the beach 45 and contiguous to the face 3 on the remaining portion of the width thereof.
  • the insert 41 internally covers the outer casing 1 over its entire contour except for the side formed by the superposition of the marginal regions 2 and 6 of the first band.
  • the beach 46 divides the inside of the tube into two channels, namely a channel 51 further delimited by the beaches 42, 44 and 45, and a channel 52 delimited by the beaches 42 and 47 and the region 2.
  • Depressions similar to those described in connection with Figures 1 and 2 are formed in the flat areas 42, 45 and 47 of the insert, and turned exclusively towards the inside of the tube. More specifically, the range 42 has two rows of recesses 53 adjacent to the channel 51 and two rows of recesses 54 adjacent to the channel 52.
  • the range 45 has a row of depressions 55 close to the range 46, a row of depressions 56 similar to the region 44 and a row of intermediate depressions 57.
  • the beach 47 has a row of depressions 58 near the beach 46, a row of depressions 59 close to the free edge of the second band and the region 2 of the first band, and a row of intermediate sinks 60.
  • the sinking centers 53, 54, 55, 56, 58 and 59 are located in transverse planes such as the sectional plane of FIG. 3, while the centers of the recesses 57 and 60 are arranged in common transverse planes situated halfway between the preceding, leading to a staggered arrangement of the recesses of each of the tracks 45 and 47.
  • the partitions thus provided between the channels are formed only once and only one thickness of the sheet.
  • the tube shown in Figures 5 and 6 comprises an outer casing 1 similar to that of the previous embodiments, and an insert 61 obtained by folding a second continuous band.
  • the two marginal regions 62, 63 of the second band are curved in a semicircle and respectively contiguous to the marginal regions 2 and 4 of the first band.
  • the regions 62 and 63 are respectively connected, via narrow oblique regions 64 and 65, to two lands 66, 67 extending substantially, subject to localized depressions, the disposition of which will be described later, along a parallel plane. to faces 3 and 5 and located halfway therefrom.
  • the beaches 66 and 67 are interconnected by a median range 68 whose profile has substantially the shape of a sinusoidal arc extending over 1.5 periods, with a median apex 69 which bears on the face 5, framed by two vertices 70 which rest on the face 3.
  • the insert 61 divides the interior of the tube into four channels, namely a channel 71 between the range 66 and the face 3, a channel 72 between the range 66 and the face 5, a channel 73 included between 67 and the face 3 and a channel 74 between the range 67 and the face 5.
  • Each of the tracks 66 and 67 of the insert 61 has three rows of depressions, namely a median row whose depressions 75 are turned towards the face 5, framed by two rows of depressions 76 facing towards the face 3.
  • the partitions of the channels thus formed have only once and only one thickness of the sheet.
  • the tube shown in Figures 7 and 8 again comprises an outer shell 1 similar to that described above and an insert 81 obtained by folding a second continuous strip.
  • a marginal region 82 of the strip constituting the insert 81 is curved substantially in a semicircle and contiguous to the region 4 of the band constituting the envelope 1.
  • the region 82 is connected to a beach 83 substantially flat and contiguous to the face 3, subject to localized depressions whose layout will be described later.
  • the track 83 is followed by a track 84 which extends across the thickness of the tube, substantially in a plane at an angle of 90 ° to the planes of the faces 3 and 5.
  • the range 84 is itself followed by a beach 85 similar to the beach 83 and contiguous to the face 5.
  • a beach 86 similar to the beach 84 connects the beach 85 to a beach 87 similar to the beaches 83 and 85 and contiguous to the face 3.
  • the beach 87 extends to a free edge 88 which is substantially at the free edge delimiting the marginal region 6 of the first band.
  • the beaches 84 and 86 share the inside of the tube in three channels, namely a median channel 91 between these two beaches and adjacent to the beach 85, a side channel 92 adjacent to the beaches 83 and 84 and a side channel 93 adjacent to the beaches. beaches 86 and 87.
  • the partitions thus provided between the channels are formed only once and only one thickness of the sheet.
  • each of the ranges 83, 85 and 87 has two rows of localized depressions 94, the depressions of these two rows being offset relative to each other in the longitudinal direction, leading to a staggered arrangement.

Landscapes

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

Abstract

The tube has a closed contour outer envelop (1) formed by a folded sheared strip and an insert (7) formed by another folded sheared strip housed in the envelope and connected to the envelope for delimiting channels (21,26). The insert has localized depressions (31) distributed on a length and on a width of the latter shear strip. An independent claim is also included for a method for fabricating a flat tube with multiple channels for circulating fluid inside a heat exchanger.

Description

L'invention concerne un tube plat à canaux multiples pour la circulation d'un fluide dans un échangeur de chaleur, comprenant une enveloppe extérieure de contour fermé et un insert logé dans ladite enveloppe extérieure et accolé à celle-ci en des zones s'étendant dans la direction longitudinale du tube pour délimiter lesdits canaux et pour renforcer mécaniquement le tube.The invention relates to a multi-channel flat tube for the circulation of a fluid in a heat exchanger, comprising an outer envelope of closed contour and an insert housed in said outer envelope and contiguous thereto in zones extending in the longitudinal direction of the tube to define said channels and to mechanically strengthen the tube.

Différentes techniques sont utilisées pour réaliser des tubes plats à canaux multiples.Different techniques are used to make multi-channel flat tubes.

L'une de ces techniques est l'emboutissage. Par cette technique, il est difficile d'obtenir de faibles épaisseurs de paroi, par exemple de 0,2 mm, ce qui augmente la consommation de matière et le poids des tubes. De plus, le cycle des machines est généralement lent et produit une grande quantité de déchets. Cette technique n'est donc pas économique.One of these techniques is stamping. By this technique, it is difficult to obtain small wall thicknesses, for example 0.2 mm, which increases the material consumption and the weight of the tubes. In addition, the machine cycle is generally slow and produces a large amount of waste. This technique is not economical.

La technique d'extrusion, largement utilisée, implique également des limites quant aux épaisseurs de parois, celles des cloisons entre canaux et de l'enveloppe extérieure ne pouvant être inférieures à environ 0,3 mm et environ 0,2 mm respectivement. Cette technique ne permet pas d'obtenir des tubes revêtus d'un matériau de brasage pour leur liaison par brasage avec une plaque collectrice. La section transversale du produit extrudé étant constante, il n'est pas possible non plus de réaliser lors de l'extrusion des déformations locales propres à améliorer l'échange de chaleur.The extrusion technique, which is widely used, also entails limits as to the thickness of the walls, those of the partitions between channels and of the outer casing must not be less than about 0.3 mm and about 0.2 mm respectively. This technique does not make it possible to obtain tubes coated with a brazing material for their connection by brazing with a collector plate. Since the cross-section of the extruded product is constant, it is not possible either to produce local deformations during extrusion, which can improve the heat exchange.

Une autre technique enfin est le pliage de bandes continues. On connaît en particulier des tubes dans lesquels l'enveloppe extérieure et les cloisons entre canaux sont obtenues par le pliage d'une même bande. Ici encore, le pliage conduit à une épaisseur des cloisons entre canaux supérieure à ce qui est nécessaire pour la résistance mécanique du tube. On connaît également des tubes dans lesquels l'enveloppe extérieure est formée par pliage d'une bande, et les canaux sont séparés les uns des autres par un insert introduit dans l'enveloppe. Dans certains cas, des enfoncements localisés sont prévus sur les faces principales opposées de l'enveloppe extérieure. Il peut en résulter une perte de contact entre le tube et des ailettes adjacentes à celui-ci dans l'échangeur de chaleur.Another technique finally is the folding of continuous strips. In particular, tubes are known in which the outer casing and the partitions between channels are obtained by folding the same band. Here again, the folding leads to a thickness of the partitions between channels greater than what is necessary for the mechanical strength of the tube. Tubes are also known in which the outer envelope is formed by folding a strip, and the channels are separated from each other by an insert introduced into the envelope. In some cases, localized depressions are provided on the opposite major faces of the outer casing. This can result in a loss of contact between the tube and fins adjacent thereto in the heat exchanger.

Le but de l'invention est de remédier aux inconvénients des tubes connus, et de fournir un tube plat à canaux multiples présentant des épaisseurs de parois et des propriétés d'échange de chaleur optimales, et pouvant être fabriqué de manière économique.The object of the invention is to overcome the drawbacks of the known tubes, and to provide a multi-channel flat tube having optimum wall thicknesses and heat exchange properties, and which can be manufactured economically.

L'invention vise notamment un tube du genre défini en introduction, et prévoit que l'insert présente des enfoncements localisés et que l'enveloppe extérieure est exempte de tels enfoncements.The invention aims in particular at a tube of the type defined in the introduction, and provides that the insert has localized depressions and that the outer casing is free of such depressions.

Dans le cadre de l'invention, les canaux sont formés par l'introduction de l'insert dans l'enveloppe extérieure. Les cloisons ainsi prévues entre les canaux ne sont formées qu'avec une fois et une seule l'épaisseur de la tôle.In the context of the invention, the channels are formed by the introduction of the insert into the outer casing. The partitions thus provided between the channels are formed only once and only one thickness of the sheet.

Le terme "enfoncement" désigne ici une déformation de la tôle par déplacement de matière dans la direction de l'épaisseur de la tôle, sensiblement avec conservation de l'épaisseur et sans formation d'ouverture à travers la tôle.The term "depressing" here means deformation of the sheet by displacement of material in the direction of the thickness of the sheet, substantially with retention of the thickness and without opening formation through the sheet.

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

  • Lesdits enfoncements ont sensiblement une forme choisie parmi celle d'une cuvette de révolution, une forme générale carrée, une forme allongée et une forme triangulaire.
  • L'enveloppe extérieure présente deux faces principales opposées sensiblement lisses.
  • L'enveloppe extérieure présente deux faces principales opposées sensiblement planes raccordées entre elles par deux côtés convexes pour former ledit contour fermé, l'un au moins desdits côtés convexes étant accolé à l'insert sur au moins une fraction majoritaire de sa surface.
  • L'insert comporte au moins une première plage s'étendant parallèlement aux faces principales de l'enveloppe extérieure ou peu inclinée par rapport à celles-ci et au moins une seconde plage plus fortement inclinée par rapport auxdites faces principales, s'étendant de l'une à l'autre de celles-ci dans la direction de l'épaisseur du tube, lesdits enfoncements étant ménagés dans la ou les premières plages et chaque seconde plage formant une cloison entre deux canaux.
  • Au moins une première plage est accolée à l'une desdites faces principales et est adjacente à un seul canal.
  • Au moins une première plage est éloignée des deux faces principales sur une partie au moins de sa surface et forme une cloison entre au moins deux canaux adjacents.
  • Au moins une première plage éloignée des deux faces principales présente des enfoncements localisés tournés les uns vers l'un desdits canaux adjacents et les autres vers l'autre desdits canaux adjacents.
  • L'un au moins parmi l'enveloppe extérieure et l'insert est formé par une bande de tôle pliée.
  • Lesdits enfoncements sont répartis sur la longueur et sur la largeur d'une bande formant l'insert.
  • L'enveloppe extérieure est formée par une bande d'une épaisseur de l'ordre de 0,1 mm.
  • L'insert est formé par une bande d'une épaisseur d'environ 0,15 à 0,2 mm.
  • L'enveloppe extérieure et l'insert sont formés respectivement par une première bande de tôle pliée et par une seconde bande de tôle pliée.
  • L'épaisseur de la seconde bande est supérieure à l'épaisseur de la première bande.
  • Le matériau de la seconde bande est différent du matériau de la première bande.
Optional features of the invention, complementary or substitution, are set out below:
  • Said recesses have substantially a shape selected from that of a bowl of revolution, a generally square shape, an elongated shape and a triangular shape.
  • The outer envelope has two main faces substantially smooth opposites.
  • The outer casing has two substantially flat opposite main faces connected to each other by two convex sides to form said closed contour, at least one of said convex sides being attached to the insert on at least a majority fraction of its surface.
  • The insert comprises at least a first range extending parallel to the main faces of the outer envelope or slightly inclined relative thereto and at least a second range more strongly inclined relative to said main faces, extending from one to the other of these in the direction of the thickness of the tube, said recesses being formed in the first or the first ranges and each second range forming a partition between two channels.
  • At least a first range is contiguous to one of said main faces and is adjacent to a single channel.
  • At least a first range is spaced from the two major faces over at least a portion of its area and forms a partition between at least two adjacent channels.
  • At least a first range away from the two main faces has localized depressions directed towards one of said adjacent channels and the other towards the other of said adjacent channels.
  • At least one of the outer casing and the insert is formed by a folded sheet metal strip.
  • Said depressions are distributed over the length and width of a strip forming the insert.
  • The outer casing is formed by a strip with a thickness of the order of 0.1 mm.
  • The insert is formed by a strip of a thickness of about 0.15 to 0.2 mm.
  • The outer casing and the insert are respectively formed by a first folded sheet metal strip and a second folded sheet metal strip.
  • The thickness of the second band is greater than the thickness of the first band.
  • The material of the second band is different from the material of the first band.

L'invention a également pour objet un procédé pour fabriquer un tube plat à canaux multiples pour la circulation d'un fluide dans un échangeur de chaleur, procédé dans lequel on plie simultanément une première bande de tôle continue de configuration appropriée pour former une enveloppe extérieure de contour fermé et une seconde bande de tôle continue de configuration appropriée pour former un insert, l'insert étant introduit dans l'enveloppe extérieure au cours du pliage de la première bande et avant la fermeture dudit contour, et on découpe transversalement la structure continue ainsi obtenue en tronçons constituant chacun un tube plat à canaux multiples tel que défini plus haut.The invention also relates to a method for manufacturing a multi-channel flat tube for the circulation of a fluid in a heat exchanger, in which process a first continuous sheet metal strip of suitable configuration is folded simultaneously to form an outer envelope. closed contour and a second continuous sheet metal strip of appropriate configuration to form an insert, the insert being introduced into the outer casing during the folding of the first band and before closing said contour, and the continuous structure is transversely cut thus obtained in sections each constituting a multi-channel flat tube as defined above.

Avantageusement, le pliage des deux bandes et l'introduction de l'insert dans l'enveloppe extérieure sont réalisés sur un même train de formage.Advantageously, the folding of the two strips and the introduction of the insert into the outer casing are made on the same forming train.

Les caractéristiques et avantages de l'invention sont exposés plus en détail dans la description ci-après, avec référence aux dessins annexés.The features and advantages of the invention are described in more detail in the description below, with reference to the accompanying drawings.

La figure 1 est une vue en coupe transversale d'un tube plat à six canaux selon l'invention.Figure 1 is a cross-sectional view of a six-channel flat tube according to the invention.

La figure 2 est une vue en perspective éclatée du tube de la figure 1.FIG. 2 is an exploded perspective view of the tube of FIG.

Les figures 3 et 4 sont des vues analogues aux figures 1 et 2 respectivement, montrant un tube à deux canaux selon l'invention.Figures 3 and 4 are views similar to Figures 1 and 2 respectively, showing a two-channel tube according to the invention.

Les figures 5 et 6 sont des vues analogues aux figures 1 et 2 respectivement, montrant un tube à quatre canaux selon l'invention.Figures 5 and 6 are views similar to Figures 1 and 2 respectively, showing a four-channel tube according to the invention.

Les figures 7 et 8 sont des vues analogues aux figures let 2 respectivement, montrant un tube à trois canaux selon l'invention.Figures 7 and 8 are views similar to Figures let 2 respectively, showing a three-channel tube according to the invention.

Le tube plat représenté sur les figures 1 et 2, destiné à être associé à d'autres tubes semblables et à au moins une boîte collectrice pour constituer un échangeur de chaleur, comprend une enveloppe extérieure 1 formée de manière classique par pliage dans un train de formage d'une première bande continue de tôle d'aluminium ou d'alliage d'aluminium. Lors du pliage, une région marginale 2 de la bande est incurvée sensiblement en demi-cercle et se raccorde à une région 3 demeurée plane et constituant l'une des faces principales de l'enveloppe. À l'opposé de la région 2, la région 3 se raccorde à une région intermédiaire 4 incurvée sensiblement en demi-cercle, suivie elle-même d'une région 5 demeurant plane qui forme la seconde face principale de l'enveloppe. Enfin, la seconde zone marginale 6 de la bande, adjacente à la région 5, est incurvée sensiblement en demi-cercle et recouvre extérieurement la région 2. La bande ainsi pliée forme un contour fermé.The flat tube shown in FIGS. 1 and 2, intended to be associated with other similar tubes and at least one collecting box for constituting a heat exchanger, comprises an outer casing 1 conventionally formed by folding in a train of forming a first continuous strip of aluminum sheet or aluminum alloy. During folding, a marginal region 2 of the strip is curved substantially in a semicircle and connects to a region 3 remained flat and constituting one of the main faces of the envelope. In contrast to region 2, region 3 is connected to an intermediate region 4 curved substantially in a semicircle, itself followed by a region 5 remaining flat which forms the second main face of the envelope. Finally, the second marginal zone 6 of the strip, adjacent to the region 5, is curved substantially in a semicircle and externally covers the region 2. The thus folded strip forms a closed contour.

Selon l'invention, une seconde bande continue est pliée en même temps que la bande 1, sur le même train de formage, pour former un insert 7 qui est introduit dans l'enveloppe avant la fermeture du contour de celle-ci. Lors du pliage de cette bande et de l'introduction de l'insert 7, une première région marginale 8 de la seconde bande est incurvée sensiblement en demi-cercle et accolée intérieurement à la région 4 de la première bande. À cette région 8 se raccorde une plage 9 s'étendant de la face 5 à la face 3 sensiblement selon un plan présentant une légère inclinaison, de l'ordre de 10°, par rapport aux plans desdites faces. La plage 9 se raccorde à une région étroite 10 accolée à la face 3, qui se raccorde elle-même à une plage 11 s'étendant de la face 3 à la face 5 sensiblement selon un plan perpendiculaire au plan de la plage 9 et par conséquent plus fortement incliné, de l'ordre de 80°, par rapport aux plans des faces 3 et 5. La plage 11 est suivie par une plage 12 semblable à la plage 10, accolée à la face 5, puis par une plage 13 s'étendant de la face 5 à la face 7, parallèlement à la plage 9. De la même manière que les plages 10, 11, 12 et 13 succèdent à la plage 9, des plages 14, 15, 16 et 17 semblables à celles-ci succèdent à la plage 13. Le bord 18 de la seconde bande opposé à la région 8 délimite la plage 17 et vient en contact avec la région 2 de la première bande.According to the invention, a second continuous band is folded together with the band 1, on the same forming train, to form an insert 7 which is introduced into the envelope before closing the contour thereof. During the folding of this band and the introduction of the insert 7, a first marginal region 8 of the second band is curved substantially in a semicircle and contiguous internally to the region 4 of the first band. To this region 8 is connected a range 9 extending from the face 5 to the face 3 substantially in a plane having a slight inclination, of the order of 10 °, with respect to the planes of said faces. The range 9 is connected to a narrow region 10 contiguous to the face 3, which itself connects to a beach 11 extending from the face 3 to the face 5 substantially in a plane perpendicular to the plane of the beach 9 and by consequently, more strongly inclined, of the order of 80 °, relative to the planes of the faces 3 and 5. The range 11 is followed by a range 12 similar to the range 10, contiguous to the face 5, then by a range 13 s extending from the face 5 to the face 7, parallel to the beach 9. In the same way that the beaches 10, 11, 12 and 13 follow the beach 9, beaches 14, 15, 16 and 17 similar to those of FIG. Here, follow the range 13. The edge 18 of the second strip opposite the region 8 delimits the track 17 and comes into contact with the region 2 of the first band.

L'insert 7 délimite six canaux à l'intérieur de l'enveloppe 1, à savoir un premier canal 21 délimité par la face 3, la région 8 et la plage 9, un second canal 22 délimité par les plages 9, 10 et 11 et la face 5, un troisième canal 23 délimité par les plages 11, 12 et 13 et la face 3, un quatrième canal 24 délimité par les plages 13, 14 et 15 et la face 5, un cinquième canal 25 délimité par les plages 15, 16 et 17 et la face 3 et un sixième canal 26 délimité par la plage 17, la région 2 et la face 5. Les cloisons ainsi prévues entre les canaux ne sont formées qu'avec une fois et une seule l'épaisseur de la tôle.The insert 7 delimits six channels inside the envelope 1, namely a first channel 21 delimited by the face 3, the region 8 and the range 9, a second channel 22 delimited by the areas 9, 10 and 11 and the face 5, a third channel 23 delimited by the tracks 11, 12 and 13 and the face 3, a fourth channel 24 delimited by the areas 13, 14 and 15 and the face 5, a fifth channel 25 delimited by the areas 15 , 16 and 17 and the face 3 and a sixth channel 26 delimited by the track 17, the region 2 and the face 5. The partitions thus provided between the channels are formed only once and only one thickness of the sheet.

Comme connu en soi, l'une et/ou l'autre des bandes utilisées peuvent présenter, sur l'une et/ou l'autre de leurs faces, un revêtement de matériau de brasage qui fondra lors d'un passage au four de l'échangeur de chaleur terminé, de manière à assurer l'étanchéité des circuits de fluide et à renforcer la liaison mécanique et la conduction thermique entre les différents composants. Le brasage assurera en particulier une liaison ferme entre les régions marginales 2 et 6 de la première bande et entre l'insert et l'enveloppe extérieure ainsi que l'étanchéité aux fluides entre l'intérieur et l'extérieur du tube et entre les canaux.As is known per se, one and / or the other of the strips used may have, on one and / or both of their faces, a coating of brazing material which will melt during a passage in the oven of the heat exchanger is completed, so as to seal the fluid circuits and strengthen the mechanical connection and thermal conduction between the various components. The brazing will ensure in particular a firm connection between the marginal regions 2 and 6 of the first band and between the insert and the envelope exterior and fluid tightness between the inside and outside of the tube and between the channels.

Comme on le voit en particulier sur la figure 2, chacune des plages 9, 13 et 17 de l'insert présente deux rangées d'enfoncements localisés, le terme "rangée" désignant ici un ensemble d'enfoncements alignés dans la direction longitudinale du tube et espacés régulièrement les uns des autres. Une rangée est formée d'enfoncements 31 dont la convexité est tournée vers un canal adjacent à la face 3, c'est à dire le canal 21, 23 ou 25 selon le cas, et l'autre rangée est formée d'enfoncements dont la convexité est tournée vers un canal adjacent à la face 5, à savoir le canal 22, 24 ou 26. Dans chaque plage les enfoncements 31 et 32 sont disposée en quinconce. Dans l'exemple illustré, chaque enfoncement 31, 32 a sensiblement la forme d'une cuvette de révolution, et plus particulièrement d'une calotte sphérique. Dans d'autres modes de réalisation, les enfoncements peuvent avoir une forme générale carrée, comme décrit et représenté dans WO 95/05571, une forme allongée ou une forme triangulaire, comme décrit et représenté dans EP 1060808, ou d'autres formes encore.As seen in particular in Figure 2, each of the ranges 9, 13 and 17 of the insert has two rows of localized depressions, the term "row" here denoting a set of depressions aligned in the longitudinal direction of the tube and spaced regularly from each other. A row is formed of recesses 31 whose convexity is turned towards a channel adjacent to the face 3, that is to say the channel 21, 23 or 25 as the case may be, and the other row is formed of depressions whose convexity is turned to a channel adjacent to the face 5, namely the channel 22, 24 or 26. In each range the recesses 31 and 32 are arranged in staggered rows. In the illustrated example, each depression 31, 32 has substantially the shape of a bowl of revolution, and more particularly of a spherical cap. In other embodiments, the depressions may have a generally square shape, as described and shown in WO 95/05571, an elongated shape or a triangular shape, as described and shown in EP 1060808, or other forms.

Le tube des figures 1 et 2 présente une largeur de 27 mm et une épaisseur de 1,5 mm, l'épaisseur de la première bande et celle de la seconde bande étant de 0,1 mm et 0,2 mm respectivement. Ces valeurs, associées à la présence des enfoncements 31 et 32 et à l'absence de tels enfoncements sur l'enveloppe extérieure, permettent d'optimiser les propriétés d'échange de chaleur du tube sans dépense de matière excessive.The tube of FIGS. 1 and 2 has a width of 27 mm and a thickness of 1.5 mm, the thickness of the first band and that of the second band being 0.1 mm and 0.2 mm respectively. These values, associated with the presence of the depressions 31 and 32 and the absence of such depressions on the outer casing, make it possible to optimize the heat exchange properties of the tube without excessive material expenditure.

Les matériaux de l'enveloppe 1 et de l'insert 7 peuvent être identiques ou différents, et sont choisis indépendamment l'un de l'autre en fonction des propriétés voulues.The materials of the envelope 1 and the insert 7 may be identical or different, and are chosen independently of one another according to the desired properties.

Le tube représenté sur les figures 3 et 4 comprend une enveloppe extérieure 1 identique à celle du tube des figures 1 et 2, contenant un insert 41 obtenu également par pliage d'une bande continue. L'insert 41 comprend une plage 42 plane et accolée à la face 5 sur toute la largeur de celle-ci, sous réserve d'enfoncements dont la disposition sera décrite plus loin. La plage 42 est limitée par un bord libre 43 de la bande qui est sensiblement adjacent au bord libre de la première bande délimitant la région marginale 2. La plage 42 est suivie par une région 44 incurvée en demi-cercle et accolée à la région 4 de l'enveloppe 1. À la région 44 fait suite une plage 45, plane et accolée à la face 3 sur un peu moins de la moitié de la largeur de celle-ci, sous réserve d'enfoncements dont la disposition sera décrite plus loin. L'insert 41 comporte également une plage 46 de section transversale en U, placée à mi-largeur du tube, dont le fond s'appuie contre la plage 42 et dont les branches s'étendent en travers de l'épaisseur du tube, l'une d'elles se raccordant à la plage 45 et l'autre se raccordant à une plage 47 semblable à la plage 45 et accolée à la face 3 sur la partie restante de la largeur de celle-ci. Ainsi, l'insert 41 recouvre intérieurement l'enveloppe extérieure 1 sur tout son contour à l'exception du côté formé par la superposition des régions marginales 2 et 6 de la première bande.The tube shown in FIGS. 3 and 4 comprises an outer casing 1 identical to that of the tube of FIGS. 1 and 2, containing an insert 41 also obtained by folding. a continuous band. The insert 41 comprises a flat surface 42 and contiguous to the face 5 over the entire width thereof, subject to depressions whose arrangement will be described later. The range 42 is bounded by a free edge 43 of the strip which is substantially adjacent to the free edge of the first band delimiting the marginal region 2. The range 42 is followed by a region 44 curved in a semicircle and contiguous to the region 4 of the envelope 1. In the region 44 follows a beach 45, flat and contiguous to the face 3 on a little less than half the width thereof, subject to depressions whose arrangement will be described later . The insert 41 also comprises a U-shaped cross-sectional area 46, placed at the mid-width of the tube, the bottom of which bears against the beach 42 and whose branches extend across the thickness of the tube. one of them connecting to the beach 45 and the other connecting to a beach 47 similar to the beach 45 and contiguous to the face 3 on the remaining portion of the width thereof. Thus, the insert 41 internally covers the outer casing 1 over its entire contour except for the side formed by the superposition of the marginal regions 2 and 6 of the first band.

La plage 46 partage l'intérieur du tube en deux canaux, à savoir un canal 51 délimité en outre par les plages 42, 44 et 45, et un canal 52 délimité en outre par les plages 42 et 47 et la région 2.The beach 46 divides the inside of the tube into two channels, namely a channel 51 further delimited by the beaches 42, 44 and 45, and a channel 52 delimited by the beaches 42 and 47 and the region 2.

Des enfoncements semblables à ceux décrits en relation avec les figures 1 et 2 sont ménagés dans les plages planes 42, 45 et 47 de l'insert, et tournés exclusivement vers l'intérieur du tube. Plus précisément, la plage 42 présente deux rangées d'enfoncements 53 adjacents au canal 51 et deux rangées d'enfoncements 54 adjacents au canal 52. La plage 45 présente une rangée d'enfoncements 55 proches de la plage 46, une rangée d'enfoncements 56 proches de la région 44 et une rangée d'enfoncements intermédiaires 57. De même, la plage 47 présente une rangée d'enfoncements 58 proches de la plage 46, une rangée d'enfoncements 59 proches du bord libre de la seconde bande et de la région 2 de la première bande, et une rangée d'enfoncements intermédiaires 60. Dans l'exemple illustré, les centres des enfoncements 53, 54, 55, 56, 58 et 59 sont situés dans des plans transversaux communs tels que le plan de coupe de la figure 3, tandis que les centres des enfoncements 57 et 60 sont disposés dans des plans transversaux communs situés à mi-distance des précédents, conduisant à une disposition en quinconce des enfoncements de chacune des plages 45 et 47.Depressions similar to those described in connection with Figures 1 and 2 are formed in the flat areas 42, 45 and 47 of the insert, and turned exclusively towards the inside of the tube. More specifically, the range 42 has two rows of recesses 53 adjacent to the channel 51 and two rows of recesses 54 adjacent to the channel 52. The range 45 has a row of depressions 55 close to the range 46, a row of depressions 56 similar to the region 44 and a row of intermediate depressions 57. Similarly, the beach 47 has a row of depressions 58 near the beach 46, a row of depressions 59 close to the free edge of the second band and the region 2 of the first band, and a row of intermediate sinks 60. In the illustrated example, the sinking centers 53, 54, 55, 56, 58 and 59 are located in transverse planes such as the sectional plane of FIG. 3, while the centers of the recesses 57 and 60 are arranged in common transverse planes situated halfway between the preceding, leading to a staggered arrangement of the recesses of each of the tracks 45 and 47.

Dans ce cas aussi, les cloisons ainsi prévues entre les canaux ne sont formées qu'avec une fois et une seule l'épaisseur de la tôle.In this case too, the partitions thus provided between the channels are formed only once and only one thickness of the sheet.

Le tube représenté sur les figures 5 et 6 comprend une enveloppe extérieure 1 semblable à celle des modes de réalisation précédents, et un insert 61 obtenu par pliage d'une seconde bande continue. Les deux régions marginales 62, 63 de la seconde bande sont incurvées en demi-cercle et accolées respectivement aux régions marginales 2 et 4 de la première bande. Les régions 62 et 63 sont raccordées respectivement, par l'intermédiaire de régions obliques étroites 64 et 65, à deux plages 66, 67 s'étendant sensiblement, sous réserve d'enfoncements localisés dont la disposition sera décrite plus loin, selon un plan parallèle aux faces 3 et 5 et situé à mi-distance de celles-ci. Les plages 66 et 67 sont reliées entre elles par une plage médiane 68 dont le profil présente sensiblement la forme d'un arc de sinusoïde s'étendant sur 1,5 période, avec un sommet médian 69 qui s'appuie sur la face 5, encadré par deux sommets 70 qui s'appuient sur la face 3.The tube shown in Figures 5 and 6 comprises an outer casing 1 similar to that of the previous embodiments, and an insert 61 obtained by folding a second continuous band. The two marginal regions 62, 63 of the second band are curved in a semicircle and respectively contiguous to the marginal regions 2 and 4 of the first band. The regions 62 and 63 are respectively connected, via narrow oblique regions 64 and 65, to two lands 66, 67 extending substantially, subject to localized depressions, the disposition of which will be described later, along a parallel plane. to faces 3 and 5 and located halfway therefrom. The beaches 66 and 67 are interconnected by a median range 68 whose profile has substantially the shape of a sinusoidal arc extending over 1.5 periods, with a median apex 69 which bears on the face 5, framed by two vertices 70 which rest on the face 3.

Ainsi, l'insert 61 divise l'intérieur du tube en quatre canaux, à savoir un canal 71 compris entre la plage 66 et la face 3, un canal 72 compris entre la plage 66 et la face 5, un canal 73 compris entre la plage 67 et la face 3 et un canal 74 compris entre la plage 67 et la face 5.Thus, the insert 61 divides the interior of the tube into four channels, namely a channel 71 between the range 66 and the face 3, a channel 72 between the range 66 and the face 5, a channel 73 included between 67 and the face 3 and a channel 74 between the range 67 and the face 5.

Chacune des plages 66 et 67 de l'insert 61 présente trois rangées d'enfoncements, à savoir une rangée médiane dont les enfoncements 75 sont tournés vers la face 5, encadrée par deux rangées d'enfoncements 76 tournés vers la face 3.Each of the tracks 66 and 67 of the insert 61 has three rows of depressions, namely a median row whose depressions 75 are turned towards the face 5, framed by two rows of depressions 76 facing towards the face 3.

Dans ce cas aussi, les cloisons des canaux ainsi formées ne comporte qu'une fois et une seule l'épaisseur de la tôle.In this case too, the partitions of the channels thus formed have only once and only one thickness of the sheet.

Le tube représenté sur les figures 7 et 8 comprend de nouveau une enveloppe extérieure 1 semblable à celle décrite précédemment et un insert 81 obtenu par pliage d'une seconde bande continue. Une région marginale 82 de la bande constitutive de l'insert 81 est incurvée sensiblement en demi-cercle et accolée à la région 4 de la bande constitutive de l'enveloppe 1. La région 82 se raccorde à une plage 83 sensiblement plane et accolée à la face 3, sous réserve d'enfoncements localisés dont la disposition sera décrite plus loin. La plage 83 est suivie d'une plage 84 qui s'étend en travers de l'épaisseur du tube, sensiblement selon un plan faisant un angle voisin de 90° avec les plans des faces 3 et 5. La plage 84 est elle-même suivie d'une plage 85 semblable à la plage 83 et accolée à la face 5. Une plage 86 semblable à la plage 84 relie la plage 85 à une plage 87 semblable aux plages 83 et 85 et accolée à la face 3. La plage 87 s'étend jusqu'à un bord libre 88 qui se situe sensiblement au droit du bord libre délimitant la région marginale 6 de la première bande.The tube shown in Figures 7 and 8 again comprises an outer shell 1 similar to that described above and an insert 81 obtained by folding a second continuous strip. A marginal region 82 of the strip constituting the insert 81 is curved substantially in a semicircle and contiguous to the region 4 of the band constituting the envelope 1. The region 82 is connected to a beach 83 substantially flat and contiguous to the face 3, subject to localized depressions whose layout will be described later. The track 83 is followed by a track 84 which extends across the thickness of the tube, substantially in a plane at an angle of 90 ° to the planes of the faces 3 and 5. The range 84 is itself followed by a beach 85 similar to the beach 83 and contiguous to the face 5. A beach 86 similar to the beach 84 connects the beach 85 to a beach 87 similar to the beaches 83 and 85 and contiguous to the face 3. The beach 87 extends to a free edge 88 which is substantially at the free edge delimiting the marginal region 6 of the first band.

Les plages 84 et 86 partagent l'intérieur du tube en trois canaux, à savoir un canal médian 91 compris entre ces deux plages et adjacent à la plage 85, un canal latéral 92 adjacent aux plages 83 et 84 et un canal latéral 93 adjacent aux plages 86 et 87.The beaches 84 and 86 share the inside of the tube in three channels, namely a median channel 91 between these two beaches and adjacent to the beach 85, a side channel 92 adjacent to the beaches 83 and 84 and a side channel 93 adjacent to the beaches. beaches 86 and 87.

Dans ce cas aussi, les cloisons ainsi prévues entre les canaux ne sont formées qu'avec une fois et une seule l'épaisseur de la tôle.In this case too, the partitions thus provided between the channels are formed only once and only one thickness of the sheet.

Comme on le voit plus particulièrement sur la figure 8, chacune des plages 83, 85 et 87 présente deux rangées d'enfoncements localisés 94, les enfoncements de ces deux rangées étant décalés les uns par rapport aux autres dans la direction longitudinale, conduisant à une disposition en quinconce.As can be seen more particularly in FIG. each of the ranges 83, 85 and 87 has two rows of localized depressions 94, the depressions of these two rows being offset relative to each other in the longitudinal direction, leading to a staggered arrangement.

Claims (17)

Tube plat à canaux multiples pour la circulation d'un fluide dans un échangeur de chaleur, comprenant une enveloppe extérieure (1) de contour fermé et un insert (7) logé dans ladite enveloppe extérieure et accolé à celle-ci en des zones (10, 12, 14, 16) s'étendant dans la direction longitudinale du tube pour délimiter lesdits canaux (21-26) et pour renforcer mécaniquement le tube, caractérisé en ce que l'insert (7) présente des enfoncements localisés (31, 32) et que l'enveloppe extérieure (1) est exempte de tels enfoncements.Multi-channel flat tube for the circulation of a fluid in a heat exchanger, comprising an outer envelope (1) of closed contour and an insert (7) housed in said outer envelope and attached thereto in zones (10). , 12, 14, 16) extending in the longitudinal direction of the tube for defining said channels (21-26) and for mechanically reinforcing the tube, characterized in that the insert (7) has localized depressions (31, 32 ) and that the outer casing (1) is free of such depressions. Tube selon la revendication 1, dans lequel lesdits enfoncements (31, 32) ont sensiblement une forme choisie parmi celle d'une cuvette de révolution, une forme générale carrée, une forme allongée et une forme triangulaire.Tube according to claim 1, wherein said depressions (31, 32) have substantially a shape selected from that of a bowl of revolution, a generally square shape, an elongated shape and a triangular shape. Tube selon l'une des revendications 1 et 2, dans lequel l'enveloppe extérieure présente deux faces principales opposées (3, 5) sensiblement lisses.Tube according to one of claims 1 and 2, wherein the outer casing has two opposite main faces (3, 5) substantially smooth. Tube selon l'une des revendications précédentes, dans lequel l'enveloppe extérieure présente deux faces principales opposées (3, 5) sensiblement planes raccordées entre elles par deux côtés convexes (2, 6, 4) pour former ledit contour fermé, l'un au moins (4) desdits côtés convexes étant accolé à l'insert (7) sur au moins une fraction majoritaire de sa surface.Tube according to one of the preceding claims, wherein the outer casing has two substantially plane opposite main faces (3, 5) connected together by two convex sides (2, 6, 4) to form said closed contour, one at least (4) of said convex sides being attached to the insert (7) on at least a majority fraction of its surface. Tube selon l'une des revendications précédentes, dans lequel l'insert comporte au moins une première plage (9, 13, 17) s'étendant parallèlement aux faces principales (3, 5) de l'enveloppe extérieure ou peu inclinée par rapport à celles-ci et au moins une seconde plage (11, 15) plus fortement inclinée par rapport auxdites faces principales, s'étendant de l'une à l'autre de celles-ci dans la direction de l'épaisseur du tube, lesdits enfoncements (31, 32) étant ménagés dans la ou les premières plages et chaque seconde plage formant une cloison entre deux canaux (22, 23, 24, 25).Tube according to one of the preceding claims, wherein the insert comprises at least a first pad (9, 13, 17) extending parallel to the main faces (3, 5) of the outer casing or slightly inclined relative to these and at least a second range (11, 15) more strongly inclined relative to said main faces, extending from one to the other thereof in the direction of the thickness of the tube, said depressions (31, 32) being formed in the first range or ranges and each second beach forming a partition between two channels (22, 23, 24, 25). Tube selon la revendication 5, dans lequel au moins une première plage (45, 47) est accolée à l'une (5) desdites faces principales et est adjacente à un seul canal (51, 52).The tube of claim 5, wherein at least a first pad (45, 47) is contiguous with one (5) of said major faces and is adjacent to a single channel (51, 52). Tube selon la revendication 5, dans lequel au moins une première plage (9) est éloignée des deux faces principales (3, 5) sur une partie au moins de sa surface et forme une cloison entre au moins deux canaux adjacents (21, 22).Tube according to Claim 5, in which at least one first region (9) is spaced from the two main faces (3, 5) over at least part of its surface and forms a partition between at least two adjacent channels (21, 22). . Tube selon la revendication 7, dans lequel au moins une première plage (9) éloignée des deux faces principales (3, 5) présente des enfoncements localisés tournés les uns (31) vers l'un (21) desdits canaux adjacents et les autres (32) vers l'autre desdits canaux adjacents.Tube according to claim 7, wherein at least a first range (9) remote from the two main faces (3, 5) has localized depressions turned one (31) to one (21) of said adjacent channels and the other ( 32) to the other of said adjacent channels. Tube selon l'une des revendications précédentes, dans lequel l'un au moins parmi l'enveloppe extérieure (1) et l'insert (7) est formé par une bande de tôle pliée.Tube according to one of the preceding claims, wherein at least one of the outer casing (1) and the insert (7) is formed by a folded sheet metal strip. Tube selon la revendication 9, dans lequel lesdits enfoncements (31, 32) sont répartis sur la longueur et sur la largeur d'une bande formant l'insert (7).Tube according to claim 9, wherein said recesses (31, 32) are distributed over the length and width of a strip forming the insert (7). Tube selon l'une des revendications 9 et 10, dans lequel l'enveloppe extérieure (1) est formée par une bande d'une épaisseur de l'ordre de 0,1 mm.Tube according to one of claims 9 and 10, wherein the outer casing (1) is formed by a strip of a thickness of the order of 0.1 mm. Tube selon l'une des revendications 9 à 11, dans lequel l'insert (7) est formé par une bande d'une épaisseur d'environ 0,15 à 0,2 mm.Tube according to one of claims 9 to 11, wherein the insert (7) is formed by a strip of a thickness of about 0.15 to 0.2 mm. Tube selon l'une des revendications 9 à 12, dans lequel l'enveloppe extérieure (1) et l'insert (7) sont formés respectivement par une première bande de tôle pliée et par une seconde bande de tôle pliée.Tube according to one of claims 9 to 12, wherein the outer casing (1) and the insert (7) are respectively formed by a first folded sheet metal strip and a second folded sheet metal strip. Tube selon la revendication 13, dans lequel l'épaisseur de la seconde bande est supérieure à l'épaisseur de la première bande.The tube of claim 13, wherein the thickness of the second band is greater than the thickness of the first band. Tube selon l'une des revendications précédentes, dans lequel le matériau de la seconde bande est différent du matériau de la première bande.Tube according to one of the preceding claims, wherein the material of the second band is different from the material of the first band. Procédé pour fabriquer un tube plat à canaux multiples pour la circulation d'un fluide dans un échangeur de chaleur, caractérisé en ce qu'on plie simultanément une première bande de tôle continue de configuration appropriée pour former une enveloppe extérieure (1) de contour fermé et une seconde bande de tôle continue de configuration appropriée pour former un insert (7), l'insert étant introduit dans l'enveloppe extérieure au cours du pliage de la première bande et avant la fermeture dudit contour, et on découpe transversalement la structure continue ainsi obtenue en tronçons constituant chacun un tube plat à canaux multiples selon l'une des revendications 13 à 15.A method for producing a multi-channel flat tube for circulating a fluid in a heat exchanger, characterized in that a first continuous shaped sheet metal strip of appropriate configuration is simultaneously folded to form an outer envelope (1) of closed contour and a second continuous sheet metal strip of suitable configuration for forming an insert (7), the insert being introduced into the outer casing during the folding of the first band and before closing said contour, and transversely cutting the continuous structure thus obtained in sections each constituting a multi-channel flat tube according to one of claims 13 to 15. Procédé selon la revendication 16, dans lequel le pliage des deux bandes et l'introduction de l'insert dans l'enveloppe extérieure sont réalisés sur un même train de formage.The method of claim 16, wherein the folding of the two strips and the introduction of the insert into the outer casing are performed on the same forming train.
EP06001414A 2005-01-24 2006-01-24 Flat tube with an insert for heat exchanger Withdrawn EP1684041A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0500709A FR2881218B1 (en) 2005-01-24 2005-01-24 FLAT TUBE WITH INSERT FOR HEAT EXCHANGER

Publications (1)

Publication Number Publication Date
EP1684041A1 true EP1684041A1 (en) 2006-07-26

Family

ID=34955075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06001414A Withdrawn EP1684041A1 (en) 2005-01-24 2006-01-24 Flat tube with an insert for heat exchanger

Country Status (2)

Country Link
EP (1) EP1684041A1 (en)
FR (1) FR2881218B1 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006029378A1 (en) * 2006-06-27 2008-01-03 Modine Manufacturing Co., Racine Heat exchanger tube comprises first thin sheet of material partially forming broad and narrow sides of tube body and partially enclosing an interior space, and second sheet of material partially forming fin brazed to tube body
DE102006035210A1 (en) * 2006-07-29 2008-01-31 Modine Manufacturing Co., Racine Heat exchanger tube comprises first thin sheet of material partially forming broad and narrow sides of tube body and partially enclosing an interior space, and second sheet of material partially forming fin brazed to tube body
US20110005738A1 (en) * 2006-11-22 2011-01-13 Modine Manufacturing Company Soldered flat tube for condensers and/or evaporators
US7921559B2 (en) 2006-01-19 2011-04-12 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8091621B2 (en) 2006-01-19 2012-01-10 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8191258B2 (en) 2006-01-19 2012-06-05 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8281489B2 (en) 2006-01-19 2012-10-09 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
FR2980739A1 (en) * 2011-10-04 2013-04-05 Valeo Systemes Thermiques COOLING RADIATOR TUBE FOR A MOTOR VEHICLE AND COOLING RADIATOR FOR A MOTOR VEHICLE COMPRISING SUCH A TUBE.
US8434227B2 (en) 2006-01-19 2013-05-07 Modine Manufacturing Company Method of forming heat exchanger tubes
US8438728B2 (en) 2006-01-19 2013-05-14 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8561451B2 (en) 2007-02-01 2013-10-22 Modine Manufacturing Company Tubes and method and apparatus for producing tubes
US8683690B2 (en) 2006-01-19 2014-04-01 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
FR2997486A1 (en) * 2012-10-25 2014-05-02 Valeo Systemes Thermiques Tube for conveying air in heat exchange body of heat exchanger for internal combustion engine of car, has fluid flow disturbance unit with central portion, which is at not-zero distance of surfaces and extends in plane of angular sector
CN103776290A (en) * 2013-12-31 2014-05-07 沁园集团股份有限公司 Spiral pipeline and manufacturing method
US8726508B2 (en) 2006-01-19 2014-05-20 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US9038267B2 (en) 2010-06-10 2015-05-26 Modine Manufacturing Company Method of separating heat exchanger tubes and an apparatus for same

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096272A (en) * 1935-07-15 1937-10-19 Young Radiator Co Turbulence means for radiator tubes
US2488615A (en) * 1942-11-11 1949-11-22 Modine Mfg Co Oil cooler tube
FR2619898A1 (en) * 1987-09-02 1989-03-03 Sueddeutsche Kuehler Behr Flat tube heat exchanger
US5491997A (en) * 1991-10-23 1996-02-20 Nippondenso Co., Ltd. Apparatus and method for forming a heat exchanger inner fin having cross-flow passages
JPH10153393A (en) * 1996-11-22 1998-06-09 Calsonic Corp Flat heating pipes for heat exchanger
DE19819248C1 (en) * 1998-04-29 1999-04-29 Valeo Klimatech Gmbh & Co Kg Flat tube for vehicle heat exchanger
EP1065466A2 (en) * 1999-07-01 2001-01-03 Ford Motor Company Flat turbulator for a tube and method of making same
EP1243884A2 (en) * 2001-03-22 2002-09-25 Delphi Technologies, Inc. Heat exchanger tube
WO2004005831A1 (en) * 2002-07-09 2004-01-15 Zexel Valeo Climate Control Corporation Tube for heat exchanger

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096272A (en) * 1935-07-15 1937-10-19 Young Radiator Co Turbulence means for radiator tubes
US2488615A (en) * 1942-11-11 1949-11-22 Modine Mfg Co Oil cooler tube
FR2619898A1 (en) * 1987-09-02 1989-03-03 Sueddeutsche Kuehler Behr Flat tube heat exchanger
US5491997A (en) * 1991-10-23 1996-02-20 Nippondenso Co., Ltd. Apparatus and method for forming a heat exchanger inner fin having cross-flow passages
JPH10153393A (en) * 1996-11-22 1998-06-09 Calsonic Corp Flat heating pipes for heat exchanger
DE19819248C1 (en) * 1998-04-29 1999-04-29 Valeo Klimatech Gmbh & Co Kg Flat tube for vehicle heat exchanger
EP1065466A2 (en) * 1999-07-01 2001-01-03 Ford Motor Company Flat turbulator for a tube and method of making same
EP1243884A2 (en) * 2001-03-22 2002-09-25 Delphi Technologies, Inc. Heat exchanger tube
WO2004005831A1 (en) * 2002-07-09 2004-01-15 Zexel Valeo Climate Control Corporation Tube for heat exchanger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8438728B2 (en) 2006-01-19 2013-05-14 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8683690B2 (en) 2006-01-19 2014-04-01 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8434227B2 (en) 2006-01-19 2013-05-07 Modine Manufacturing Company Method of forming heat exchanger tubes
US7921559B2 (en) 2006-01-19 2011-04-12 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8091621B2 (en) 2006-01-19 2012-01-10 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8191258B2 (en) 2006-01-19 2012-06-05 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8281489B2 (en) 2006-01-19 2012-10-09 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8726508B2 (en) 2006-01-19 2014-05-20 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
DE102006029378B4 (en) * 2006-06-27 2014-02-13 Modine Manufacturing Co. Flat tube for heat exchangers and manufacturing process
DE102006029378A1 (en) * 2006-06-27 2008-01-03 Modine Manufacturing Co., Racine Heat exchanger tube comprises first thin sheet of material partially forming broad and narrow sides of tube body and partially enclosing an interior space, and second sheet of material partially forming fin brazed to tube body
DE102006035210B4 (en) * 2006-07-29 2016-10-06 Modine Manufacturing Co. Flat heat exchanger tube and manufacturing process
DE102006035210A1 (en) * 2006-07-29 2008-01-31 Modine Manufacturing Co., Racine Heat exchanger tube comprises first thin sheet of material partially forming broad and narrow sides of tube body and partially enclosing an interior space, and second sheet of material partially forming fin brazed to tube body
US20110005738A1 (en) * 2006-11-22 2011-01-13 Modine Manufacturing Company Soldered flat tube for condensers and/or evaporators
US8561451B2 (en) 2007-02-01 2013-10-22 Modine Manufacturing Company Tubes and method and apparatus for producing tubes
US9038267B2 (en) 2010-06-10 2015-05-26 Modine Manufacturing Company Method of separating heat exchanger tubes and an apparatus for same
FR2980739A1 (en) * 2011-10-04 2013-04-05 Valeo Systemes Thermiques COOLING RADIATOR TUBE FOR A MOTOR VEHICLE AND COOLING RADIATOR FOR A MOTOR VEHICLE COMPRISING SUCH A TUBE.
WO2013050382A1 (en) * 2011-10-04 2013-04-11 Valeo Systemes Thermiques Cooling radiator tube for a motor vehicle, and cooling radiator for a motor vehicle including such a tube
FR2997486A1 (en) * 2012-10-25 2014-05-02 Valeo Systemes Thermiques Tube for conveying air in heat exchange body of heat exchanger for internal combustion engine of car, has fluid flow disturbance unit with central portion, which is at not-zero distance of surfaces and extends in plane of angular sector
CN103776290A (en) * 2013-12-31 2014-05-07 沁园集团股份有限公司 Spiral pipeline and manufacturing method
CN103776290B (en) * 2013-12-31 2016-08-17 沁园集团股份有限公司 A kind of spirality pipe and manufacture method

Also Published As

Publication number Publication date
FR2881218B1 (en) 2007-06-01
FR2881218A1 (en) 2006-07-28

Similar Documents

Publication Publication Date Title
EP1684041A1 (en) Flat tube with an insert for heat exchanger
EP3175181B1 (en) Improved enthalpy exchanger
EP0811820B1 (en) Flat tube with median spacer for heat exchanger
WO2001050080A2 (en) Multichannel tube heat exchanger
WO2007074290A1 (en) Novel heat exchanger corrugations and applications thereof
FR2681419A1 (en) Heat exchanger with tube bundle including several fluid circuits
FR2793016A1 (en) EXTENDED COLLECTOR BOX FOR HEAT EXCHANGER RESISTANT TO HIGH INTERNAL PRESSURES
EP1693606B1 (en) Metal gasket with a thickening formed by interrupted protusions
FR2638226A1 (en) PLATE HEAT EXCHANGER
WO2003046456A1 (en) Tube profiles for heat exchanger
EP2062830B1 (en) A bag including closing profiles actuated by a slider
WO2000033008A1 (en) Flat tube for heat exchanger of reduced width
EP3447432B1 (en) Heat exchange plate member having microchannels comprising a plate-edge assembly element
EP2615214B1 (en) Device for collecting rainwater
FR2863044A1 (en) Heat exchange module for circulating fluids has manifold divided by partitions into inlet and outlet chambers for different fluids
FR2733264A1 (en) Method of assembling cladding panels
EP4094933B1 (en) Method for manufacturing a honeycomb structure obtained from folded strips of material and honeycomb structure thus obtained
FR2814537A1 (en) Heat exchanger for cooling vehicle exhaust has longitudinal partitions connected to collector boxes at each end and transverse partitions, some of which are connected to collector boxes on each side, ensuring fluid flows in one direction
FR2866699A1 (en) Heat exchanger for transferring heat energy, has plates connected together such that outer and inner edges are joined to form single block circuit, and circulation unit circulating fluid between other outer edges and sides of plates
FR2777644A1 (en) Heat exchanger in particular for vehicles with interlocking flat thermoplastic tubes
EP1548385A2 (en) Heat exchange tube with two flow passages and heat exchanger provided with such tubes
FR2755217A1 (en) IMPROVED STACKED PLATE EVAPORATOR FOR AIR CONDITIONING INSTALLATION, ESPECIALLY A MOTOR VEHICLE
FR2925665A1 (en) Brazed tube for circulating air in heat exchanger of vehicle, has thermal insulation brace placed between channels and parallel to one of large flat sides of cover, where rectangular shaped openings are provided in thermal insulation brace
EP0888955B1 (en) Sidewall-element for a vehicle with sheet piles and vehicle constructed with sheet-piles
FR2871723A1 (en) Twin-wall extruded panel or sheet has reinforcing ribs made by hotmoulded depressions in at least one wall between partitions

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20061107

17Q First examination report despatched

Effective date: 20061220

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070403