EP0776454B1 - Flat tube for a heat exchanger - Google Patents

Flat tube for a heat exchanger Download PDF

Info

Publication number
EP0776454B1
EP0776454B1 EP96922944A EP96922944A EP0776454B1 EP 0776454 B1 EP0776454 B1 EP 0776454B1 EP 96922944 A EP96922944 A EP 96922944A EP 96922944 A EP96922944 A EP 96922944A EP 0776454 B1 EP0776454 B1 EP 0776454B1
Authority
EP
European Patent Office
Prior art keywords
flat
central segment
free edges
piece
flat tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96922944A
Other languages
German (de)
French (fr)
Other versions
EP0776454A1 (en
Inventor
Frédéric Letrange
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 Thermique Moteur SA
Original Assignee
Valeo Thermique Moteur SA
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 Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP0776454A1 publication Critical patent/EP0776454A1/en
Application granted granted Critical
Publication of EP0776454B1 publication Critical patent/EP0776454B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/151—Making tubes with multiple passages
    • 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
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/906—Reinforcement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49391—Tube making or reforming

Definitions

  • the invention relates to a flat tube for a heat exchanger. heat, in particular from a heating and / or heating installation motor vehicle air conditioning or for an installation motor vehicle cooling.
  • It relates more particularly to a flat tube of the type comprising two opposite flat sides interconnected by two rounded sides and by two internal partitions longitudinal to define circulation channels in the tube.
  • Such flat tubes also called “multichannel tubes” are arranged in parallel to form a beam, which also includes corrugated dividers, forming fins, arranged between the tubes.
  • These tubes are intended to be traversed by a fluid coolant which can be water or a refrigerant.
  • these multichannel tubes can be used to form a condenser of an air conditioning system and then be crossed by a refrigerant. This last may be at high pressure.
  • the internal partitions of the tubes serve in such a case to stiffen the tube and prevent its deformation under the effect high refrigerant pressure.
  • the partitions allow define traffic channels that can be crossed by different fluids, possibly against the current.
  • this known tube has the disadvantage that it does not allow to realize that flat tubes having a single partition internal and thus delimiting only two channels of circulation.
  • the object of the invention is in particular to overcome the drawbacks cited above.
  • the tube is thus obtained by assembling and brazing two complementary parts which closely fit together in the other, the main room sandwiching the secondary room.
  • the two parts When the two parts are assembled and brazed, they constitute a single tube which includes two partitions internal and therefore three circulation channels, which extend parallel to each other.
  • each free edges of the main room is folded at an angle right relative to the corresponding side segment and stops at a distance from the first flat side, leaving a given value interval.
  • each of the free edges of the secondary part is folded at right angles to the central segment and ends with a rim which is substantially parallel to the central segment and which is suitable for entering a corresponding interval of the main room, which allows a close nesting of the two parts between them.
  • the value of the interval is substantially equal to the thickness of the metal strip from which the secondary part, which allows a tight assembly.
  • the metal strip of the main room has a solder plating on one of its faces, or outer face, which allows, on the one hand, to form a solder joint with the secondary part and, on the other hand, to form a weld bead with the fins of the exchanger.
  • the strip metal of the secondary part is provided with a plating of solder on both sides, which allows, on the one hand, to obtain a weld bead with the main part and, on the other hand, to ensure a weld bead with the heat exchanger fins.
  • the flat tube shown in cross section in the figure 1 is formed by the assembly and brazing of two parts complementary, namely a main room 12 and a secondary room 14.
  • Main part 12 is formed from a strip metallic, for example aluminum or aluminum alloy, folded by several successive rolling operations.
  • the part 12 includes a first flat side 16 framed by two rounded sides 18, of semi-circular shape, which are connected respectively with two lateral segments 20 of configuration plane.
  • the two lateral segments 20 are parallel to the flat side 16 and each have a width which corresponds substantially to the third of the width of the flat side 16.
  • Each side segment 20 leads to a free edge 22 folded at right angles to direction of the interior of the flat side 16.
  • the two edges free 22 are parallel to each other and spaced apart by a distance d which is substantially equal to a third of the width of the side flat 16.
  • Each of the free edges 22 stops at a distance from the flat side 16 with an interval i of given value which is substantially equal to the thickness of the metal strip of which the secondary part 14 is formed. This thickness is in practice the same as that of the metal strip whose the main part 12 is formed.
  • the secondary part 14 is formed from a strip folded metal, e.g. aluminum or alloy aluminum, obtained by several rolling operations successive.
  • the part 14 comprises a central segment 24 of planar configuration whose width is substantially equal to the aforementioned distance d.
  • This central segment 24 leads to two free edges 26 folded at right angles, so that they extend parallel between them.
  • Each of the free edges 26 continues with a rim 28 which is perpendicular to edge 26 and therefore parallel to segment 24.
  • the two flanges 28 are coplanar and extend in opposite directions.
  • the secondary part 14 can be nested sandwiched in main room 12 in position shown in Figure 1.
  • each of the edges 26 of the part 14 comes pressing against a corresponding edge 22 of the part 12, while each of the flanges 28 comes to be embedded in a interval i of the part 12.
  • the nesting of the two parts can be done in a longitudinal direction, or by slight deformation of at least one of the two parts.
  • each edge 22 forms with the edge 26 and the rim 16 corresponding to an internal partition, so that the tube is divided into three channels 30 which extend in parallel between them.
  • the central segment 14 and the two lateral segments 20 are coplanar and thus form a second flat side 32 of the flat tube, which extends parallel to the first flat side 16.
  • the metal strip from which the main part 12 is formed has a solder plating on its outer face FE to allow the formation of a solder joint with the secondary part 14. This also makes it possible to obtain a weld bead for connecting the tube with fins 34, as shown in Figure 2.
  • the metal strip from which the part is formed secondary 14 is provided with a solder plating on its face external FE and on its internal face FI. This allows to obtain a weld bead of the two flanges 28 with inside the flat side 16.
  • the presence of the flanges 28 is optional. However, this presence is preferable for facilitate temporary maintenance of the two parts to the soldering operation.
  • the flat tube according to the invention is intended for making heat exchangers, in particular for heating installations heating and / or air conditioning of motor vehicles.

Landscapes

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

Description

L'invention concerne un tube plat pour un échangeur de chaleur, notamment d'une installation de chauffage et/ou de climatisation de véhicule automobile ou pour une installation de refroidissement de véhicule automobile.The invention relates to a flat tube for a heat exchanger. heat, in particular from a heating and / or heating installation motor vehicle air conditioning or for an installation motor vehicle cooling.

Elle concerne plus particulièrement un tube plat du type comprenant deux côtés plats opposés reliés entre eux par deux côtés arrondis et par deux cloisons internes longitudinales pour définir des canaux de circulation dans le tube.It relates more particularly to a flat tube of the type comprising two opposite flat sides interconnected by two rounded sides and by two internal partitions longitudinal to define circulation channels in the tube.

De tels tubes plats, encore appelés "tubes multicanaux", sont disposés en parallèle pour former un faisceau, lequel comprend aussi des intercalaires ondulés, formant ailettes, disposés entre les tubes.Such flat tubes, also called "multichannel tubes", are arranged in parallel to form a beam, which also includes corrugated dividers, forming fins, arranged between the tubes.

Ces tubes sont destinés à être parcourus par un fluide caloporteur qui peut être de l'eau ou un fluide frigorigène.These tubes are intended to be traversed by a fluid coolant which can be water or a refrigerant.

En particulier, ces tubes multicanaux peuvent être utilisés pour former un condenseur d'une installation de climatisation et être alors traversés par un fluide frigorigène. Ce dernier peut se trouver à une pression élevée.In particular, these multichannel tubes can be used to form a condenser of an air conditioning system and then be crossed by a refrigerant. This last may be at high pressure.

Les cloisons internes des tubes servent en pareil cas à rigidifier le tube et à empêcher sa déformation sous l'effet de la pression élevée du fluide frigorigène.The internal partitions of the tubes serve in such a case to stiffen the tube and prevent its deformation under the effect high refrigerant pressure.

Pour certaines applications, les cloisons permettent de définir des canaux de circulation pouvant être traversés par des fluides différents, éventuellement à contre-courant.For some applications, the partitions allow define traffic channels that can be crossed by different fluids, possibly against the current.

On connaít déjà par le Brevet Européen No 0 302 232, un tube plat de ce type, lequel est obtenu à partir d'une bande métallique soumise à plusieurs opérations de roulage successives pour former les deux côtés plats, les deux côtés arrondis et deux bords repliés en U, lesquels sont brasés entre eux et à un des grands côtés, pour former ainsi deux canaux de circulation.We already know by European Patent No 0 302 232, a tube dish of this type, which is obtained from a strip metallic subjected to several successive rolling operations to form the two flat sides, the two sides rounded and two U-folded edges, which are brazed between them and at one of the long sides, thus forming two circulation channels.

L'un des problèmes principaux rencontrés dans la fabrication de ce tube connu est la réalisation des bords repliés en U. En effet, l'exécution de ces bords repliés est délicate et risque de conduire à des amorces de rupture.One of the main problems encountered in manufacturing of this known tube is the realization of the edges folded into a U. Indeed, the execution of these folded edges is delicate and risk of leading to ruptures.

En outre, ce tube connu a pour inconvénient qu'il ne permet de réaliser que des tubes plats ayant une seule cloison interne et délimitant ainsi uniquement deux canaux de circulation.In addition, this known tube has the disadvantage that it does not allow to realize that flat tubes having a single partition internal and thus delimiting only two channels of circulation.

L'invention a notamment pour but de surmonter les inconvénients précités.The object of the invention is in particular to overcome the drawbacks cited above.

Elle propose en conséquence un tube plat du type défini en introduction, lequel est formé par assemblage et brasage de deux pièces complémentaires qui comprennent :

  • une première pièce, ou pièce principale, formée à partir d'une bande métallique pliée et constituant un premier côté plat, les deux côtés arrondis et deux segments latéraux raccordés respectivement aux deux côtés arrondis pour constituer en partie le second côté plat, les deux segments latéraux aboutissant respectivement à deux bords libres distants l'un de l'autre et repliés en direction du premier côté plat; et
  • une seconde pièce, ou pièce secondaire, formée à partir d'une bande métallique pliée et constituant un segment central propre à former en partie le second côté plat, le segment central aboutissant à deux bords libres repliés d'un même côté dudit segment, en sorte que les bords libres du segment central peuvent s'appliquer contre les bords libres des segments latéraux pour maintenir la pièce secondaire en sandwich dans la pièce principale, et que le segment principal et les segments latéraux forment ensemble le second côté plat du tube.
It therefore proposes a flat tube of the type defined in the introduction, which is formed by assembling and brazing two complementary parts which include:
  • a first part, or main part, formed from a folded metal strip and constituting a first flat side, the two rounded sides and two lateral segments respectively connected to the two rounded sides to partially constitute the second flat side, the two segments lateral leading respectively to two free edges distant from each other and folded in the direction of the first flat side; and
  • a second part, or secondary part, formed from a folded metal strip and constituting a central segment suitable for partially forming the second flat side, the central segment ending in two free edges folded on the same side of said segment, in so that the free edges of the central segment can be pressed against the free edges of the side segments to hold the secondary part sandwiched in the main part, and that the main segment and the side segments together form the second flat side of the tube.

Le tube est ainsi obtenu par assemblage et brasage de deux pièces complémentaires qui s'imbriquent étroitement l'une dans l'autre, la pièce principale prenant en sandwich la pièce secondaire.The tube is thus obtained by assembling and brazing two complementary parts which closely fit together in the other, the main room sandwiching the secondary room.

Ces deux pièces peuvent être obtenues facilement par déformation mécanique, obtenue en pratique par des opérations de roulage successives, à partir d'une bande métallique.These two parts can be obtained easily by deformation mechanical, obtained in practice by operations of successive rolling, from a metal strip.

Lorsque les deux pièces sont assemblées et brasées, elles constituent un seul et même tube qui comprend deux cloisons internes et donc trois canaux de circulation, qui s'étendent parallèlement entre eux.When the two parts are assembled and brazed, they constitute a single tube which includes two partitions internal and therefore three circulation channels, which extend parallel to each other.

Dans une forme de réalisation préférée de l'invention, chacun des bords libres de la pièce principale est replié à angle droit par rapport au segment latéral correspondant et s'arrête à distance du premier côté plat en ménageant un intervalle de valeur donnée.In a preferred embodiment of the invention, each free edges of the main room is folded at an angle right relative to the corresponding side segment and stops at a distance from the first flat side, leaving a given value interval.

Avantageusement, chacun des bords libres de la pièce secondaire est replié à angle droit par rapport au segment central et se termine par un rebord qui est sensiblement parallèle au segment central et qui est propre à s'introduire dans un intervalle correspondant de la pièce principale, ce qui permet une imbrication étroite des deux pièces entre elles.Advantageously, each of the free edges of the secondary part is folded at right angles to the central segment and ends with a rim which is substantially parallel to the central segment and which is suitable for entering a corresponding interval of the main room, which allows a close nesting of the two parts between them.

De préférence, la valeur de l'intervalle est sensiblement égale à l'épaisseur de la bande métallique dont est formée la pièce secondaire, ce qui permet un assemblage étroit.Preferably, the value of the interval is substantially equal to the thickness of the metal strip from which the secondary part, which allows a tight assembly.

Avantageusement, la bande métallique de la pièce principale est munie d'un placage de brasure sur l'une de ses faces, ou face extérieure, ce qui permet, d'une part, de former un joint de soudure avec la pièce secondaire et, d'autre part, de former un cordon de soudure avec les ailettes de l'échangeur.Advantageously, the metal strip of the main room has a solder plating on one of its faces, or outer face, which allows, on the one hand, to form a solder joint with the secondary part and, on the other hand, to form a weld bead with the fins of the exchanger.

Selon une autre caractéristique de l'invention, la bande métallique de la pièce secondaire est munie d'un placage de brasure sur ses deux faces, ce qui permet, d'une part, d'obtenir un cordon de soudure avec la pièce principale et, d'autre part, d'assurer un cordon de soudure avec les ailettes de l'échangeur de chaleur.According to another characteristic of the invention, the strip metal of the secondary part is provided with a plating of solder on both sides, which allows, on the one hand, to obtain a weld bead with the main part and, on the other hand, to ensure a weld bead with the heat exchanger fins.

Dans la description qui suit, faite seulement à titre d'exemple, on se réfère au dessin annexé, sur lequel :

  • la figure 1 est une vue en coupe transversale d'un tube plat selon l'invention; et
  • la figure 2 est une vue partielle de côté d'un échangeur de chaleur comprenant des tubes plats selon l'invention intercalés avec des ailettes.
In the description which follows, given solely by way of example, reference is made to the appended drawing, in which:
  • Figure 1 is a cross-sectional view of a flat tube according to the invention; and
  • Figure 2 is a partial side view of a heat exchanger comprising flat tubes according to the invention interposed with fins.

Le tube plat représenté en coupe transversale sur la figure 1 est formé par l'assemblage et brasage de deux pièces complémentaires, à savoir une pièce principale 12 et une pièce secondaire 14.The flat tube shown in cross section in the figure 1 is formed by the assembly and brazing of two parts complementary, namely a main room 12 and a secondary room 14.

La pièce principale 12 est formée à partir d'une bande métallique, par exemple en aluminium ou alliage d'aluminium, pliée par plusieurs opérations de roulage successives. La pièce 12 comprend un premier côté plat 16 encadré par deux côtés arrondis 18, de forme semi-circulaire, qui se raccordent respectivement à deux segments latéraux 20 de configuration plane.Main part 12 is formed from a strip metallic, for example aluminum or aluminum alloy, folded by several successive rolling operations. The part 12 includes a first flat side 16 framed by two rounded sides 18, of semi-circular shape, which are connected respectively with two lateral segments 20 of configuration plane.

Les deux segments latéraux 20 sont parallèles au côté plat 16 et ont chacun une largeur qui correspond sensiblement au tiers de la largeur du côté plat 16. Chaque segment latéral 20 aboutit à un bord libre 22 replié à angle droit en direction de l'intérieur du côté plat 16. Les deux bords libres 22 sont parallèles entre eux et écartés d'une distance d qui est sensiblement égale au tiers de la largeur du côté plat 16. Chacun des bords libres 22 s'arrête à distance du côté plat 16 en ménageant un intervalle i de valeur donnée qui est sensiblement égal à l'épaisseur de la bande métallique dont est formée la pièce secondaire 14. Cette épaisseur est en pratique la même que celle de la bande métallique dont est formée la pièce principale 12.The two lateral segments 20 are parallel to the flat side 16 and each have a width which corresponds substantially to the third of the width of the flat side 16. Each side segment 20 leads to a free edge 22 folded at right angles to direction of the interior of the flat side 16. The two edges free 22 are parallel to each other and spaced apart by a distance d which is substantially equal to a third of the width of the side flat 16. Each of the free edges 22 stops at a distance from the flat side 16 with an interval i of given value which is substantially equal to the thickness of the metal strip of which the secondary part 14 is formed. This thickness is in practice the same as that of the metal strip whose the main part 12 is formed.

La pièce secondaire 14 est formée à partir d'une bande métallique pliée, par exemple en aluminium ou alliage d'aluminium, obtenue par plusieurs opérations de roulage successives. La pièce 14 comprend un segment central 24 de configuration plane dont la largeur est sensiblement égale à la distance d précitée.The secondary part 14 is formed from a strip folded metal, e.g. aluminum or alloy aluminum, obtained by several rolling operations successive. The part 14 comprises a central segment 24 of planar configuration whose width is substantially equal to the aforementioned distance d.

Ce segment central 24 aboutit à deux bords libres 26 repliés à angle droit, de telle sorte qu'ils s'étendent parallèlement entre eux. Chacun des bords libres 26 se poursuit par un rebord 28 qui est perpendiculaire au bord 26 et donc parallèle au segment 24. Les deux rebords 28 sont coplanaires et s'étendent dans des directions opposées.This central segment 24 leads to two free edges 26 folded at right angles, so that they extend parallel between them. Each of the free edges 26 continues with a rim 28 which is perpendicular to edge 26 and therefore parallel to segment 24. The two flanges 28 are coplanar and extend in opposite directions.

Il en résulte que la pièce secondaire 14 peut être imbriquée en sandwich dans la pièce principale 12 dans la position représentée à la figure 1.As a result, the secondary part 14 can be nested sandwiched in main room 12 in position shown in Figure 1.

Dans cette position, chacun des bords 26 de la pièce 14 vient en appui contre un bord correspondant 22 de la pièce 12, tandis que chacun des rebords 28 vient s'encastrer dans un intervalle i de la pièce 12. L'emboítement des deux pièces peut se faire dans une direction longitudinale, ou bien par légère déformation de l'une au moins des deux pièces.In this position, each of the edges 26 of the part 14 comes pressing against a corresponding edge 22 of the part 12, while each of the flanges 28 comes to be embedded in a interval i of the part 12. The nesting of the two parts can be done in a longitudinal direction, or by slight deformation of at least one of the two parts.

Après assemblage, chaque bord 22 forme avec le bord 26 et le rebord 16 correspondant une cloison interne, si bien que le tube est divisé en trois canaux 30 qui s'étendent parallèlement entre eux. After assembly, each edge 22 forms with the edge 26 and the rim 16 corresponding to an internal partition, so that the tube is divided into three channels 30 which extend in parallel between them.

Lorsque les deux pièces sont assemblées, le segment central 14 et les deux segments latéraux 20 sont coplanaires et forment ainsi un second côté plat 32 du tube plat, qui s'étend parallèlement au premier côté plat 16.When the two parts are assembled, the central segment 14 and the two lateral segments 20 are coplanar and thus form a second flat side 32 of the flat tube, which extends parallel to the first flat side 16.

La bande métallique dont est formée la pièce principale 12 est munie d'un placage de brasure sur sa face extérieure FE pour permettre la formation d'un joint de soudure avec la pièce secondaire 14. Ceci permet également d'obtenir un cordon de soudure pour la liaison du tube avec des ailettes 34, comme montré à la figure 2.The metal strip from which the main part 12 is formed has a solder plating on its outer face FE to allow the formation of a solder joint with the secondary part 14. This also makes it possible to obtain a weld bead for connecting the tube with fins 34, as shown in Figure 2.

Par ailleurs, la bande métallique dont est formée la pièce secondaire 14 est munie d'un placage de brasure sur sa face extérieure FE et sur sa face intérieure FI. Ceci permet d'obtenir un cordon de soudure des deux rebords 28 avec l'intérieur du côté plat 16.Furthermore, the metal strip from which the part is formed secondary 14 is provided with a solder plating on its face external FE and on its internal face FI. this allows to obtain a weld bead of the two flanges 28 with inside the flat side 16.

Cela permet également d'obtenir un cordon de soudure entre les bords 22 et 26 et également un cordon de soudure avec les ailettes 34 d'un échangeur de chaleur, comme montré à la figure 2.This also makes it possible to obtain a weld bead between edges 22 and 26 and also a weld bead with the fins 34 of a heat exchanger, as shown in the figure 2.

L'invention n'est pas limitée à la forme de réalisation décrite précédemment et s'étend à d'autres variantes.The invention is not limited to the embodiment described above and extends to other variants.

On notera notamment que la présence des rebords 28 est facultative. Toutefois, cette présence est préférable pour faciliter un maintien provisoire des deux pièces pour l'opération de brasage.It will be noted in particular that the presence of the flanges 28 is optional. However, this presence is preferable for facilitate temporary maintenance of the two parts to the soldering operation.

Le tube plat selon l'invention est destiné à la réalisation d'échangeurs de chaleur, notamment pour installations de chauffage et/ou de climatisation de véhicules automobiles.The flat tube according to the invention is intended for making heat exchangers, in particular for heating installations heating and / or air conditioning of motor vehicles.

Claims (7)

  1. A flat tube for a heat exchanger, of the type comprising two opposed flat sides joined together by two rounded sides and by two longitudinal internal partitions to define flow ducts, characterised in that the tube is formed by assembling and brazing two complementary pieces which comprise:
    a main piece (12) formed from a bent metal strip and constituting a first flat side (16), the two rounded sides (18) and two lateral segments (20), which are connected to the two respective rounded sides (18) to constitute part of the second flat side (32), the two lateral segments (20) terminating in two respective free edges (22) which are distant from each other and bent toward the first flat side (16); and
    a secondary piece (14) formed from a metal strip and constituting a central segment (24) adapted to constitute part of the second flat side (32), with the central segment terminating in two free edges (26) bent on the same side of the said central segment, so that the two free edges (26) of the central segment can bear against the free edges (22) of the lateral segments (32) to hold the secondary piece (14) sandwiched in the main piece (12), and so that the central segment (24) and the two lateral segments (32) together constitute the second flat side (32) of the tube.
  2. A flat tube according to Claim 1, characterised in that each of the free edges (22) of the main piece (12) is bent at right angles with respect to the corresponding lateral segment (20), and terminates at a distance from the first flat side (16) to define a gap (i) of given size.
  3. A flat tube according to Claim 2, characterised in that each of the free edges (26) of the secondary piece (14) is bent at right angles with respect to the central segment (24) and terminates in a lip (28), which is substantially parallel to the central segment (24) and which is adapted to be inserted into a gap (i) in the main piece (12).
  4. A flat tube according to Claim 2 or Claim 3, characterised in that the size of the gap (i) is substantially equal to the thickness of the metal strip from which the secondary piece (14) is formed.
  5. A flat tube according to one of Claims 1 to 4, characterised in that the main piece (12) and the secondary piece (14) are obtained by successive rolling operations.
  6. A flat tube according to one of Claims 1 to 5, characterised in that the metal strip from which the main piece (12) is formed is coated with a layer of braze metal on one of its faces (FE) which extends outwards.
  7. A flat tube according to one of Claims 1 to 6, characterised in that the metal strip from which the secondary piece (14) is formed is coated with a layer of braze metal on both of its faces (FE, FI).
EP96922944A 1995-06-22 1996-06-18 Flat tube for a heat exchanger Expired - Lifetime EP0776454B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9507513A FR2735853B1 (en) 1995-06-22 1995-06-22 FLAT TUBE FOR HEAT EXCHANGER
FR9507513 1995-06-22
PCT/FR1996/000939 WO1997001071A1 (en) 1995-06-22 1996-06-18 Flat tube for a heat exchanger

Publications (2)

Publication Number Publication Date
EP0776454A1 EP0776454A1 (en) 1997-06-04
EP0776454B1 true EP0776454B1 (en) 1998-05-20

Family

ID=9480295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96922944A Expired - Lifetime EP0776454B1 (en) 1995-06-22 1996-06-18 Flat tube for a heat exchanger

Country Status (7)

Country Link
US (1) US5704423A (en)
EP (1) EP0776454B1 (en)
KR (1) KR970705731A (en)
DE (1) DE69600309T2 (en)
ES (1) ES2117900T3 (en)
FR (1) FR2735853B1 (en)
WO (1) WO1997001071A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3829242B2 (en) * 1996-02-28 2006-10-04 敬 高橋 Flat piping
US5956846A (en) * 1997-03-21 1999-09-28 Livernois Research & Development Co. Method and apparatus for controlled atmosphere brazing of unwelded tubes
FR2769358B1 (en) * 1997-10-02 2000-01-28 Valeo Thermique Moteur Sa MULTI-CHANNEL FLAT TUBE FOR HEAT EXCHANGER
FR2772901B1 (en) * 1997-12-23 2000-03-03 Valeo Thermique Moteur Sa FOLDED TUBE AND BRAZED FOR HEAT EXCHANGER, AND HEAT EXCHANGER COMPRISING SUCH TUBES
GB0101697D0 (en) * 2001-01-23 2001-03-07 Emerson & Renwick Ltd Heat exchanger tube
US6530514B2 (en) 2001-06-28 2003-03-11 Outokumpu Oyj Method of manufacturing heat transfer tubes
US6467535B1 (en) * 2001-08-29 2002-10-22 Visteon Global Technologies, Inc. Extruded microchannel heat exchanger
US20080279222A1 (en) * 2001-10-18 2008-11-13 Level 3 Communications Llc Distribution of traffic across a computer network
DE10201512A1 (en) * 2002-01-17 2003-07-31 Behr Gmbh & Co Multi-chamber flat tube
US7032808B2 (en) * 2003-10-06 2006-04-25 Outokumu Oyj Thermal spray application of brazing material for manufacture of heat transfer devices
US20080047141A1 (en) * 2006-08-08 2008-02-28 Inventec Corporation Method for fabricating supporting column of heat sink
US20080302518A1 (en) * 2007-06-07 2008-12-11 Joseph Durdel Flat tube heat exchanger
DE102007039292A1 (en) * 2007-08-20 2009-02-26 Behr Gmbh & Co. Kg Multi-chamber flat tube, heat exchanger and use of a heat exchanger
FR2956949B1 (en) 2010-03-04 2013-04-19 Pelle Equipements COOKING DEVICE FOR FOOD PRODUCTS BASED ON PASTE AND COOKING FILET.
EP2584301B1 (en) 2011-10-19 2014-08-13 WS-Wärmeprozesstechnik GmbH High temperature heat exchanger
US9302337B2 (en) * 2012-08-09 2016-04-05 Modine Manufacturing Company Heat exchanger tube, heat exchanger tube assembly, and methods of making the same
US9015923B2 (en) 2012-08-09 2015-04-28 Modine Manufacturing Company Heat exchanger tube, heat exchanger tube assembly, and methods of making the same
WO2014042585A2 (en) * 2012-09-14 2014-03-20 Revent International Ab Hot air oven

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE805785C (en) * 1949-12-30 1951-05-31 Friedrich Karl Rosenbaum Welded plate radiator
FR1573193A (en) * 1968-04-17 1969-07-04
CH626160A5 (en) * 1977-10-14 1981-10-30 Bogatzki Hans Ulrich
US4805693A (en) * 1986-11-20 1989-02-21 Modine Manufacturing Multiple piece tube assembly for use in heat exchangers
DE3725602A1 (en) * 1987-08-01 1989-02-09 Sueddeutsche Kuehler Behr FLAT TUBE FOR A HEAT EXCHANGER
US5186251A (en) * 1992-06-01 1993-02-16 General Motors Corporation Roll formed heat exchanger tubing with double row flow passes
GB2268260A (en) * 1992-06-24 1994-01-05 Llanelli Radiators Ltd Heat exchange tubes formed from a unitary portion of sheet or strip material
US5441105A (en) * 1993-11-18 1995-08-15 Wynn's Climate Systems, Inc. Folded parallel flow condenser tube
US5511613A (en) * 1994-12-12 1996-04-30 Hudson Products Corporation Elongated heat exchanger tubes having internal stiffening structure

Also Published As

Publication number Publication date
FR2735853A1 (en) 1996-12-27
FR2735853B1 (en) 1997-08-01
DE69600309T2 (en) 1998-09-10
ES2117900T3 (en) 1998-08-16
EP0776454A1 (en) 1997-06-04
WO1997001071A1 (en) 1997-01-09
US5704423A (en) 1998-01-06
KR970705731A (en) 1997-10-09
DE69600309D1 (en) 1998-06-25

Similar Documents

Publication Publication Date Title
EP0776454B1 (en) Flat tube for a heat exchanger
EP1192402B1 (en) Multichannel tube heat exchanger, in particular for motor vehicle
EP0505244B1 (en) Heat exchanger with tube bundle, more particularly for motor vehicle
EP2208955B1 (en) heat exchange fin for a heat exchange system
FR2902510A1 (en) SIDE PLATE FOR HEAT EXCHANGER, METHOD FOR MANUFACTURING HEAT EXCHANGER, AND HEAT EXCHANGER
EP0567399A1 (en) Heat exchanger tube with integrated perturbation device
EP0805329A1 (en) Heat exchanger with a tubular header box and fastening element
WO2018060638A1 (en) Heat exchanger, in particular for a motor vehicle
FR2770632A1 (en) Heat exchanger with reinforced collector
EP1579162B1 (en) Heat exchanger module and method of producing
FR2728667A1 (en) HEAT EXCHANGER, HEAT EXCHANGER TUBE AND METHODS FOR THEIR MANUFACTURE
EP2655000A1 (en) Brazing method for a heat exchanger, and corresponding tube and heat exchanger
FR2832788A1 (en) Profile for tubes in heat exchangers used in motor vehicles, uses folded metal sheet to form tube and bends one edge over so that it rests on other wall of tube, providing strength to the tube during manufacture
FR2823840A1 (en) Heat exchanger folded tube is obtained by folding metal strip over itself to define two channels separated by partition to form transverse member created by strip folded edges
FR2904400A1 (en) TRANSITION ASSEMBLY BETWEEN HEAT EXCHANGER AND EXTERNAL FLOW CIRCUIT, HEAT EXCHANGER, AND METHOD FOR MANUFACTURING THE TRANSITION ASSEMBLY
FR2786558A1 (en) FLAT TUBE FOR REDUCED WIDTH HEAT EXCHANGER
US20020007940A1 (en) Brazed tube for a heat exchanger, method of manufacture and exchanger
WO2018060625A1 (en) Heat exchanger, in particular for a motor vehicle
WO2007048826A2 (en) Collector box for a heat exchanger, particularly for a high-pressure fluid, exchanger comprising a box of this type and method for the production thereof
EP1509740B1 (en) Manifold heat exchanger and manifold chamber of simple construction particularly for a motor vehicle
FR2769358A1 (en) Heat exchange tube for motor vehicle radiator
FR2780153A1 (en) Flast tube heat exchanger esp for motor vehicle cooling system radiator
FR2817334A1 (en) Brazed flat tube heat exchanger has tube ends cut away and folded outwards for brazing inside manifold
EP1548385A2 (en) Heat exchange tube with two flow passages and heat exchanger provided with such tubes
FR2800451A1 (en) Compact heat exchanger for vehicle, comprises shell joined directly to side of collector plate near but not touching the collar sides and cooling tubes fitted within the collector plate collars

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

17P Request for examination filed

Effective date: 19970127

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES GB IT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19971023

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB IT SE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980520

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19980617

Year of fee payment: 3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19980622

Year of fee payment: 3

REF Corresponds to:

Ref document number: 69600309

Country of ref document: DE

Date of ref document: 19980625

ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2117900

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990619

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990629

EUG Se: european patent has lapsed

Ref document number: 96922944.2

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000618

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000618

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050618

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150612

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69600309

Country of ref document: DE