EP0764823B1 - Heat exchanger tube with counter flow channels - Google Patents

Heat exchanger tube with counter flow channels Download PDF

Info

Publication number
EP0764823B1
EP0764823B1 EP96114637A EP96114637A EP0764823B1 EP 0764823 B1 EP0764823 B1 EP 0764823B1 EP 96114637 A EP96114637 A EP 96114637A EP 96114637 A EP96114637 A EP 96114637A EP 0764823 B1 EP0764823 B1 EP 0764823B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
exchanger tube
fluid
tube
tubes
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
EP96114637A
Other languages
German (de)
French (fr)
Other versions
EP0764823A1 (en
Inventor
Olivier Dion
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 Climatisation SA
Original Assignee
Valeo Climatisation 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 Climatisation SA filed Critical Valeo Climatisation SA
Publication of EP0764823A1 publication Critical patent/EP0764823A1/en
Application granted granted Critical
Publication of EP0764823B1 publication Critical patent/EP0764823B1/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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/035—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 with U-flow or serpentine-flow inside the 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
    • F28D1/0391—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
    • 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

Definitions

  • the invention relates to a tube suitable for being part of a heat exchanger, such as a cooling radiator the engine of a motor vehicle.
  • a heat exchanger tube heat of the type comprising a cut metal sheet and rolled on itself so as to delimit two channels parallel for the circulation of a fluid against the current, while forming a longitudinal partition between the two channels, the tube having a first end suitable for connection to a fluid compartment with two compartments suitable for communicating with the two respectively canals.
  • this known heat exchanger provision is also made corrugated dividers, forming fins, arranged between the tubes.
  • the different components of this heat exchanger known heat are made of aluminum or alloy aluminum, and they are joined together by brazing.
  • the tubes have each a second end which is closed by a plate closure located opposite the fluid box.
  • the partition is interrupted in the region of this second end to allow the fluid to change direction of circulation, the fluid circulating first in a first channel of the tube in a direction of circulation given and then in a second tube channel in a direction of opposite circulation, that is to say against the current.
  • the fluid enters one of the compartments from the fluid box, circulates in the first channels respective tubes by forming a first layer of fluid in a given direction of circulation, then circulates in the respective second channels of the tubes forming a second tablecloth in an opposite direction of circulation, then gains the other compartment of the fluid box to leave the heat exchanger heat.
  • the object of the invention is in particular to overcome the drawbacks cited above.
  • a heat exchanger tube of the type defined in the introduction which presents a second end which is closed individually to ensure the shutter of the two channels, and in which at least two communication openings are made in the partition longitudinal of the tube, in selected places, in the region of the second end to allow the passage of the fluid from one channel to another.
  • each tube Because the second end of each tube is closed individually and that communication openings are in the longitudinal wall of the tube, there results from the change in direction of circulation of the fluid, which passes from the first channel to the second, is carried out so gentle while minimizing pressure losses.
  • the openings of communication at the same time act as a shock absorber since the fluid can pass from the first channel to the second channel in several places axially spaced along the bulkhead of the tube, thereby minimizing pressure losses.
  • the closure of the second end is obtained by folding the metal sheet, which avoids to use a closing plate as in the exchanger of the above document.
  • the communication openings are general rectangular shape.
  • the partition longitudinal separation is formed by at least one edge of the metal sheet folded towards the inside of the tube.
  • the communication openings are at least partly formed by slots from at least one of the edges of the metal sheet, which forms partition.
  • the tube has a first large flat face, two small faces substantially semicircular and a second large face plane formed by the junction of two marginal bands of the sheet metal, along two edges folded at right angles which together constitute the partition wall.
  • this partition wall is formed by the meeting of the two folded edges and has a double thickness.
  • the tube is extends, beyond its first end, by at least two opposite legs for fixing the tube to a plate collector of a fluid box.
  • the invention also relates to a heat exchanger comprising a multiplicity of tubes as defined previously, these tubes being arranged parallel between each and connected to a fluid box with two compartments longitudinal, so that all the tubes have a first channel connected to a first compartment of the box fluid and a second channel connected to a second compartment of the fluid box to provide a U-shaped circulation in two parallel layers.
  • this exchanger heat also includes corrugated spacers arranged between the tubes.
  • the heat exchanger of the invention is advantageously assembled by brazing.
  • Figure 1 represents a tube 10 formed from a metal sheet, for example in aluminum or aluminum alloy, cut and rolled on itself so as to delimit two parallel channels 12 and 14 for the circulation of a fluid against the current.
  • the tube has a first large flat face 16, two substantially semicircular small faces 18 and 20 and a second large flat face formed by the junction of two marginal strips 22 and 24 of the sheet, along two edges 26 and 28 folded at right angles.
  • the two edges 26 and 28 are leaned against each other and come to rest against the interior of the large flat face 16, which allows define a longitudinal partition between the channels 12 and 14.
  • the tube 10 has a first end 30 and a second end 32. It extends beyond its first end 30, by two pairs of opposite legs 34 whose function will be explained later.
  • the sheet of the tube 10 is folded back on itself, at its second end 32, to form a fold or flap 36 and thus ensure the closing of the tube and the obturation of channels 12 and 14 at the end 32.
  • the bulkhead separation 26, 28 comprises, in the region of the end 32, three passage openings 38, 40 and 42 placed in chosen places.
  • the opening 38 results from the interruption of the partition 26, 28 beyond a transverse edge 44 of folded edges 26 and 28.
  • the opening 38 thus extends between this edge 44 and the part of the end 32 at the flap 36.
  • the communication opening 38 thus has a form substantially rectangular.
  • the openings 40 and 42 are also rectangular in shape but result from a particular configuration of the edges folded 26 and 28 which have cutouts in the form of slots.
  • the channels 12 and 14 communicate with each other, in the region of the end 32, through the three openings of communication 38, 40 and 42 arranged in selected places along the partition wall. So a fluid can enter the channel 12 at the end 30 (arrow F1), then go to channel 14 through the openings of communication 38, 40 and 42 (arrows F2, F3 and F4) then circulate in channel 14 against the current (arrow F5) to leave the channel 14 through the end 30 of the tube 10.
  • FIG. 2 shows an exchanger heat 46 comprising a multiplicity of tubes 10 identical or similar to that of FIG. 1.
  • the tubes 10 are arranged parallel to each other and spacers wavy 48 forming fins are arranged between the large faces opposite two adjacent tubes.
  • the respective ends 30 of the tubes 10 are connected to a collector plate 50 comprising a row of holes 52 so that the channels 12 and 14 of the same tube 10 open out each time opposite a hole 52.
  • the end 30 of each tube 10 is kept applied against the collector plate 50 and the legs 34 are then folded back, as shown in the Figure 2, to ensure temporary maintenance of the tubes 10 with the collector plate 50.
  • the collector plate 50 has a peripheral rim 54 used to fit a fluid box 56 to two internal compartments 58 and 60. These two compartments extend parallel to each other.
  • Compartment 58 or entry compartment, communicates with the channels 12 of the tubes 10, while the compartment 60, or outlet compartment, communicates with channels 14 of tubes 10.
  • the fluid box 56 includes a tubing inlet 62 and outlet tubing 64 which communicate respectively with compartments 58 and 60 to ensure respectively the entry and exit of a fluid, as shown by the arrows.
  • a fluid can enter compartment 58 through the tubing 62, circulate in the channels 12 of the tubes 10 in thus constituting a first traffic layer, gaining then the channels 14 of the tubes 10 and circulate in the channels 14 by forming a second layer, gaining the compartment 60 and leave the latter via the tubing 64.
  • a circulation in two layers and against the current AT each time, the transition between the two traffic layers is carried out gently, and with a minimum of losses load, thanks to the openings 38, 40 and 42 of each tube 10.
  • the heat exchanger 46 of FIG. 2 is advantageously made with aluminum or aluminum alloy components coated with solder, which ensures their assembly by passage through a suitable oven.
  • a heat exchanger heat can be used in particular as a heat radiator cooling the engine of a motor vehicle, or as a radiator for heating the passenger compartment of such vehicle.
  • the fluid circulating in the exchanger heat is the fluid used to cool the engine of the vehicle.
  • heat exchanger of the invention does not require only one fluid box, which allows reduce the weight and size, the cost of the material and the number of manufacturer's references.
  • each tube can be produced in a different way by folding one or two edges of prison.
  • the communication openings in the partition can be made with other configurations.

Description

L'invention concerne un tube propre à faire partie d'un échangeur de chaleur, tel qu'un radiateur de refroidissement du moteur d'un véhicule automobile.The invention relates to a tube suitable for being part of a heat exchanger, such as a cooling radiator the engine of a motor vehicle.

Elle concerne plus particulièrement un tube d'échangeur de chaleur, du type comprenant une tôle métallique découpée et roulée sur elle-même de manière à délimiter deux canaux parallèles pour la circulation d'un fluide à contre-courant, tout en formant une cloison longitudinale de séparation entre les deux canaux, le tube présentant une première extrémité propre à être raccordée à une boíte à fluide à deux compartiments propres à communiquer respectivement avec les deux canaux.It relates more particularly to a heat exchanger tube heat, of the type comprising a cut metal sheet and rolled on itself so as to delimit two channels parallel for the circulation of a fluid against the current, while forming a longitudinal partition between the two channels, the tube having a first end suitable for connection to a fluid compartment with two compartments suitable for communicating with the two respectively canals.

On connaít déjà, d'après EP-A-0 632 245, un échangeur de chaleur comprenant une multiplicité de tubes de ce type.Already known from EP-A-0 632 245, a heat exchanger heat comprising a multiplicity of tubes of this type.

Dans cet échangeur de chaleur connu, il est prévu également des intercalaires ondulés, formant ailettes, disposés entre les tubes. Les différents composants de cet échangeur de chaleur connus sont réalisés en aluminium ou en alliage d'aluminium, et ils sont assemblés entre eux par brasage.In this known heat exchanger, provision is also made corrugated dividers, forming fins, arranged between the tubes. The different components of this heat exchanger known heat are made of aluminum or alloy aluminum, and they are joined together by brazing.

Dans l'échangeur de chaleur décrit, les tubes présentent chacun une seconde extrémité qui est obturée par une plaque de fermeture située à l'opposé de la boíte à fluide.In the heat exchanger described, the tubes have each a second end which is closed by a plate closure located opposite the fluid box.

Dans chaque tube, la cloison est interrompue dans la région de cette seconde extrémité pour permettre au fluide de changer de sens de circulation, le fluide circulant d'abord dans un premier canal du tube dans un sens de circulation donné, puis dans un second canal du tube dans un sens de circulation opposé, c'est-à-dire à contre-courant. In each tube, the partition is interrupted in the region of this second end to allow the fluid to change direction of circulation, the fluid circulating first in a first channel of the tube in a direction of circulation given and then in a second tube channel in a direction of opposite circulation, that is to say against the current.

Il en résulte que le fluide pénètre dans un des compartiments de la boíte à fluide, circule dans les premiers canaux respectifs des tubes en formant une première nappe de fluide dans un sens de circulation donné, circule ensuite dans les seconds canaux respectifs des tubes en formant une seconde nappe dans un sens de circulation opposé, puis gagne l'autre compartiment de la boíte à fluide pour quitter l'échangeur de chaleur.As a result, the fluid enters one of the compartments from the fluid box, circulates in the first channels respective tubes by forming a first layer of fluid in a given direction of circulation, then circulates in the respective second channels of the tubes forming a second tablecloth in an opposite direction of circulation, then gains the other compartment of the fluid box to leave the heat exchanger heat.

Un des problèmes posés par ce type d'échangeur de chaleur est que le fluide est dévié brusquement par la plaque de fermeture située au niveau de la seconde extrémité de chaque tube, ce qui conduit à une perte de charge et peut en outre engendrer des problèmes d'usure du fait de l'impact du fluide qui change brusquement de sens de circulation au niveau de la plaque de fermeture.One of the problems with this type of heat exchanger is that the fluid is deflected abruptly by the closing plate located at the second end of each tube, which leads to a pressure drop and can further cause wear problems due to the impact of the fluid which suddenly changes direction of circulation at the level of the closing plate.

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 d'échangeur de chaleur du type défini en introduction, lequel présente une seconde extrémité qui est fermée individuellement pour assurer l'obturation des deux canaux, et dans lequel au moins deux ouvertures de communication sont pratiquées dans la cloison longitudinale du tube, à des endroits choisis, dans la région de la seconde extrémité afin de permettre le passage du fluide d'un canal à l'autre.It therefore proposes a heat exchanger tube of the type defined in the introduction, which presents a second end which is closed individually to ensure the shutter of the two channels, and in which at least two communication openings are made in the partition longitudinal of the tube, in selected places, in the region of the second end to allow the passage of the fluid from one channel to another.

Du fait que la seconde extrémité de chaque tube est fermée individuellement et que des ouvertures de communication sont pratiquées dans la cloison longitudinale du tube, il en résulte que le changement de sens de circulation du fluide, qui passe du premier canal au second, s'effectue de façon douce en minimisant les pertes de charge. Les ouvertures de communication jouent en même temps le rôle d'amortisseur puisque le fluide peut passer du premier canal au second canal en plusieurs endroits espacés axialement le long de la cloison du tube, ce qui minimise ainsi les pertes de charge. Because the second end of each tube is closed individually and that communication openings are in the longitudinal wall of the tube, there results from the change in direction of circulation of the fluid, which passes from the first channel to the second, is carried out so gentle while minimizing pressure losses. The openings of communication at the same time act as a shock absorber since the fluid can pass from the first channel to the second channel in several places axially spaced along the bulkhead of the tube, thereby minimizing pressure losses.

De plus, la tenue mécanique est grandement améliorée au niveau de la seconde extrémité.In addition, the mechanical strength is greatly improved level of the second end.

De façon avantageuse, la fermeture de la seconde extrémité est obtenue par pliage de la feuille métallique, ce qui évite de recourir à une plaque de fermeture comme dans l'échangeur de chaleur du document précité.Advantageously, the closure of the second end is obtained by folding the metal sheet, which avoids to use a closing plate as in the exchanger of the above document.

Avantageusement, les ouvertures de communication sont de forme générale rectangulaire.Advantageously, the communication openings are general rectangular shape.

Selon une autre caractéristique de l'invention, la cloison longitudinale de séparation est formée par au moins un bord de la tôle métallique replié vers l'intérieur du tube.According to another characteristic of the invention, the partition longitudinal separation is formed by at least one edge of the metal sheet folded towards the inside of the tube.

Dans ce cas, on préfère que les ouvertures de communication soient au moins en partie formées par des créneaux à partir d'au moins l'un des bords de la tôle métallique, qui forme cloison.In this case, it is preferred that the communication openings are at least partly formed by slots from at least one of the edges of the metal sheet, which forms partition.

Dans une forme de réalisation de l'invention, le tube présente une première grande face plane, deux petites faces sensiblement semi-circulaires et une seconde grande face plane formée par la jonction de deux bandes marginales de la tôle, le long de deux bords repliés à angle droit qui constituent ensemble la cloison de séparation.In one embodiment of the invention, the tube has a first large flat face, two small faces substantially semicircular and a second large face plane formed by the junction of two marginal bands of the sheet metal, along two edges folded at right angles which together constitute the partition wall.

Ainsi, cette cloison de séparation est formée par la réunion des deux bords repliés et présente une double épaisseur.So, this partition wall is formed by the meeting of the two folded edges and has a double thickness.

Selon une autre caractéristique de l'invention, le tube se prolonge, au-delà de sa première extrémité, par au moins deux pattes opposées pour la fixation du tube à une plaque collectrice d'une boíte à fluide.According to another characteristic of the invention, the tube is extends, beyond its first end, by at least two opposite legs for fixing the tube to a plate collector of a fluid box.

Ceci permet de fixer provisoirement le tube à la plaque collectrice avant assemblage par brasage. This allows to temporarily fix the tube to the plate manifold before assembly by brazing.

L'invention concerne également un échangeur de chaleur comprenant une multiplicité de tubes tels que définis précédemment, ces tubes étant disposés parallèlement entre eux et raccordés chacun à une boíte à fluide à deux compartiments longitudinaux, en sorte que tous les tubes aient un premier canal raccordé à un premier compartiment de la boíte à fluide et un second canal raccordé à un second compartiment de la boíte à fluide pour procurer une circulation en U en deux nappes parallèles.The invention also relates to a heat exchanger comprising a multiplicity of tubes as defined previously, these tubes being arranged parallel between each and connected to a fluid box with two compartments longitudinal, so that all the tubes have a first channel connected to a first compartment of the box fluid and a second channel connected to a second compartment of the fluid box to provide a U-shaped circulation in two parallel layers.

Selon une autre caractéristique de l'invention, cet échangeur de chaleur comprend en outre des intercalaires ondulés disposés entre les tubes.According to another characteristic of the invention, this exchanger heat also includes corrugated spacers arranged between the tubes.

L'échangeur de chaleur de l'invention est avantageusement assemblé par brasage.The heat exchanger of the invention is advantageously assembled by brazing.

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

  • la figure 1 est une vue partielle en perspective et avec arrachement d'un tube d'échangeur de chaleur selon l'invention; et
  • la figure 2 est une vue partielle en perspective et en coupe d'un échangeur de chaleur comprenant une multiplicité de tubes selon la figure 1.
In the description which follows, given by way of example, reference is made to the appended drawing, in which:
  • Figure 1 is a partial perspective view with cutaway of a heat exchanger tube according to the invention; and
  • FIG. 2 is a partial perspective view in section of a heat exchanger comprising a multiplicity of tubes according to FIG. 1.

On se réfère tout d'abord à la figure 1 qui représente un tube 10 formé à partir d'une tôle métallique, par exemple en aluminium ou alliage d'aluminium, découpée et roulée sur elle-même de manière à délimiter deux canaux parallèles 12 et 14 pour la circulation d'un fluide à contre-courant.We first refer to Figure 1 which represents a tube 10 formed from a metal sheet, for example in aluminum or aluminum alloy, cut and rolled on itself so as to delimit two parallel channels 12 and 14 for the circulation of a fluid against the current.

Le tube présente une première grande face plane 16, deux petites faces sensiblement semi-circulaires 18 et 20 et une seconde grande face plane formée par la jonction de deux bandes marginales 22 et 24 de la tôle, le long de deux bords 26 et 28 repliés à angle droit. Les deux bords 26 et 28 sont adossés l'un contre l'autre et viennent en appui contre l'intérieur de la grande face plane 16, ce qui permet de définir une cloison longitudinale de séparation entre les canaux 12 et 14. Le tube 10 comporte une première extrémité 30 et une seconde extrémité 32. Il se prolonge, au-delà de sa première extrémité 30, par deux paires de pattes opposées 34 dont la fonction sera expliquée plus loin.The tube has a first large flat face 16, two substantially semicircular small faces 18 and 20 and a second large flat face formed by the junction of two marginal strips 22 and 24 of the sheet, along two edges 26 and 28 folded at right angles. The two edges 26 and 28 are leaned against each other and come to rest against the interior of the large flat face 16, which allows define a longitudinal partition between the channels 12 and 14. The tube 10 has a first end 30 and a second end 32. It extends beyond its first end 30, by two pairs of opposite legs 34 whose function will be explained later.

Par ailleurs, la tôle du tube 10 est repliée sur elle-même, à sa seconde extrémité 32, pour former un pliage ou rabat 36 et assurer ainsi la fermeture du tube et l'obturation des canaux 12 et 14 au niveau de l'extrémité 32.Furthermore, the sheet of the tube 10 is folded back on itself, at its second end 32, to form a fold or flap 36 and thus ensure the closing of the tube and the obturation of channels 12 and 14 at the end 32.

Comme on peut le voir en bas de la figure 1, la cloison de séparation 26, 28 comporte, dans la région de l'extrémité 32, trois ouvertures de passage 38, 40 et 42 placées en des endroits choisis. L'ouverture 38 résulte de l'interruption de la cloison 26, 28 au-delà d'un bord transversal 44 des rebords pliés 26 et 28. L'ouverture 38 s'étend ainsi entre ce bord 44 et la partie de l'extrémité 32 au niveau du rabat 36.As can be seen at the bottom of Figure 1, the bulkhead separation 26, 28 comprises, in the region of the end 32, three passage openings 38, 40 and 42 placed in chosen places. The opening 38 results from the interruption of the partition 26, 28 beyond a transverse edge 44 of folded edges 26 and 28. The opening 38 thus extends between this edge 44 and the part of the end 32 at the flap 36.

L'ouverture de communication 38 présente ainsi une forme sensiblement rectangulaire.The communication opening 38 thus has a form substantially rectangular.

Les ouvertures 40 et 42 sont également de forme rectangulaire mais résultent d'une configuration particulière des bords repliés 26 et 28 qui présentent des découpes en forme de créneaux.The openings 40 and 42 are also rectangular in shape but result from a particular configuration of the edges folded 26 and 28 which have cutouts in the form of slots.

Il en résulte que les canaux 12 et 14 communiquent entre eux, dans la région de l'extrémité 32, par les trois ouvertures de communication 38, 40 et 42 disposées en des endroits choisis le long de la cloison de séparation. Ainsi, un fluide peut pénétrer dans le canal 12 au niveau de l'extrémité 30 (flèche F1), gagner ensuite le canal 14 par les ouvertures de communication 38, 40 et 42 (flèches F2, F3 et F4) puis circuler dans le canal 14 à contre-courant (flèche F5) pour quitter le canal 14 par l'extrémité 30 du tube 10. As a result, the channels 12 and 14 communicate with each other, in the region of the end 32, through the three openings of communication 38, 40 and 42 arranged in selected places along the partition wall. So a fluid can enter the channel 12 at the end 30 (arrow F1), then go to channel 14 through the openings of communication 38, 40 and 42 (arrows F2, F3 and F4) then circulate in channel 14 against the current (arrow F5) to leave the channel 14 through the end 30 of the tube 10.

Il en résulte que le passage du fluide du canal 12 au canal 14 par les ouvertures 38, 40 et 42 se fait de façon douce, avec un minimum de pertes de charge, les ouvertures 38, 40 et 42 jouant le rôle d'amortisseurs.As a result, the passage of the fluid from channel 12 to the channel 14 through openings 38, 40 and 42 is done gently, with a minimum pressure drop, the openings 38, 40 and 42 playing the role of shock absorbers.

On se réfère maintenant à la figure 2 qui montre un échangeur de chaleur 46 comprenant une multiplicité de tubes 10 identiques ou similaires à celui de la figure 1. Les tubes 10 sont disposés parallèlement entre eux et des intercalaires ondulés 48 formant ailettes sont disposés entre les grandes faces en vis-à-vis de deux tubes adjacents.We now refer to Figure 2 which shows an exchanger heat 46 comprising a multiplicity of tubes 10 identical or similar to that of FIG. 1. The tubes 10 are arranged parallel to each other and spacers wavy 48 forming fins are arranged between the large faces opposite two adjacent tubes.

Les extrémités respectives 30 des tubes 10 sont raccordées à une plaque collectrice 50 comportant une rangée de trous 52 en sorte que les canaux 12 et 14 d'un même tube 10 débouchent chaque fois en regard d'un trou 52. L'extrémité 30 de chaque tube 10 est maintenue appliquée contre la plaque collectrice 50 et les pattes 34 sont ensuite repliées, comme montré à la figure 2, pour assurer un maintien provisoire des tubes 10 avec la plaque collectrice 50.The respective ends 30 of the tubes 10 are connected to a collector plate 50 comprising a row of holes 52 so that the channels 12 and 14 of the same tube 10 open out each time opposite a hole 52. The end 30 of each tube 10 is kept applied against the collector plate 50 and the legs 34 are then folded back, as shown in the Figure 2, to ensure temporary maintenance of the tubes 10 with the collector plate 50.

La plaque collectrice 50 comporte un rebord périphérique 54 servant à l'emboítement d'une boíte à fluide 56 à deux compartiments internes 58 et 60. Ces deux compartiments s'étendent parallèlement entre eux.The collector plate 50 has a peripheral rim 54 used to fit a fluid box 56 to two internal compartments 58 and 60. These two compartments extend parallel to each other.

Le compartiment 58, ou compartiment d'entrée, communique avec les canaux 12 des tubes 10, tandis que le compartiment 60, ou compartiment de sortie, communique avec les canaux 14 des tubes 10.Compartment 58, or entry compartment, communicates with the channels 12 of the tubes 10, while the compartment 60, or outlet compartment, communicates with channels 14 of tubes 10.

Par ailleurs, la boíte à fluide 56 comporte une tubulure d'entrée 62 et une tubulure de sortie 64 qui communiquent respectivement avec les compartiments 58 et 60 pour assurer respectivement l'entrée et la sortie d'un fluide, comme montré par les flèches.In addition, the fluid box 56 includes a tubing inlet 62 and outlet tubing 64 which communicate respectively with compartments 58 and 60 to ensure respectively the entry and exit of a fluid, as shown by the arrows.

Ainsi, un fluide peut pénétrer dans le compartiment 58 par la tubulure 62, circuler dans les canaux 12 des tubes 10 en constituant ainsi une première nappe de circulation, gagner ensuite les canaux 14 des tubes 10 et circuler dans les canaux 14 en formant une seconde nappe, gagner le compartiment 60 et quitter ce dernier par la tubulure 64. On obtient ainsi une circulation en deux nappes et à contre-courant. A chaque fois, la transition entre les deux nappes de circulation s'effectue de façon douce, et avec un minimum de pertes de charge, grâce aux ouvertures 38, 40 et 42 de chaque tube 10.Thus, a fluid can enter compartment 58 through the tubing 62, circulate in the channels 12 of the tubes 10 in thus constituting a first traffic layer, gaining then the channels 14 of the tubes 10 and circulate in the channels 14 by forming a second layer, gaining the compartment 60 and leave the latter via the tubing 64. We obtain thus a circulation in two layers and against the current. AT each time, the transition between the two traffic layers is carried out gently, and with a minimum of losses load, thanks to the openings 38, 40 and 42 of each tube 10.

L'échangeur de chaleur 46 de la figure 2 est avantageusement réalisé avec des composants en aluminium ou alliage d'aluminium revêtu de brasure, ce qui permet d'assurer leur assemblage par passage dans un four approprié. Un tel échangeur de chaleur peut être utilisé notamment en tant que radiateur de refroidissement du moteur d'un véhicule automobile, ou en tant que radiateur de chauffage de l'habitacle d'un tel véhicule. En pareil cas, le fluide circulant dans l'échangeur de chaleur est le fluide servant au refroidissement du moteur du véhicule.The heat exchanger 46 of FIG. 2 is advantageously made with aluminum or aluminum alloy components coated with solder, which ensures their assembly by passage through a suitable oven. Such a heat exchanger heat can be used in particular as a heat radiator cooling the engine of a motor vehicle, or as a radiator for heating the passenger compartment of such vehicle. In this case, the fluid circulating in the exchanger heat is the fluid used to cool the engine of the vehicle.

On comprendra que l'échangeur de chaleur de l'invention ne nécessite qu'une seule boíte à fluide, ce qui permet de diminuer le poids et l'encombrement, le coût de la matière et le nombre des références du constructeur.It will be understood that the heat exchanger of the invention does not requires only one fluid box, which allows reduce the weight and size, the cost of the material and the number of manufacturer's references.

Bien entendu, l'invention n'est pas limitée à la forme de réalisation décrite précédemment à titre d'exemple et s'étend à d'autres variantes.Of course, the invention is not limited to the form of embodiment described above by way of example and extends to other variants.

Ainsi, la cloison de séparation de chaque tube peut être réalisée de façon différente par pliage d'un ou deux bords de la tôle.Thus, the partition wall of each tube can be produced in a different way by folding one or two edges of prison.

De plus, les ouvertures de communication ménagées dans la cloison peuvent être réalisées avec d'autres configurations.In addition, the communication openings in the partition can be made with other configurations.

Claims (10)

  1. A heat exchanger tube, comprising a sheet metal piece cut out and rolled on itself so as to define two parallel ducts (12, 14) for the flow of a fluid in contraflow, while defining a longitudinal separating baffle (26, 28) between the two ducts, the tube (10) having a first end (30) adapted to be connected to a fluid header (56) defining two compartments (58, 60) which are arranged to communicate with two respective ducts (12, 14), characterised in that it has a second end (32) which is closed individually so as to obturate the two ducts (12, 14), and in that at least two communication ports (38, 40, 42) are formed in the longitudinal baffle (26, 28) of the tube (10) at selected positions in the region of the second end (32) so as to enable fluid to pass from one duct to the other.
  2. A heat exchanger tube according to Claim 1, characterised in that closure of the second end (32) is provided by a bend (36) in the metal leaf.
  3. A heat exchanger tube according to Claim 1 or Claim 2, characterised in that the communication ports (38, 40, 42) are of generally rectangular form.
  4. A heat exchanger tube according to one of Claims 1 to 3, characterised in that the longitudinal separating baffle is defined by at least one edge (26, 28) of the sheet metal piece, bent towards the interior of the tube.
  5. A heat exchanger tube according to one of Claims 1 to 4, characterised in that the communication ports (38, 40, 42) are at least partly defined by crenellations projecting from at least one of the edges of the sheet metal piece that constitutes a baffle.
  6. A heat exchanger tube according to one of Claims 1 to 5, characterised in that it has a large first flat face (16), two substantially semicircular small faces (18, 20) and a second flat face defined by two marginal strips (22, 24) of the piece, which are in conjunction along two edges (26, 28) bent at right angles which together constitute the separating baffle.
  7. A heat exchanger tube according to one of Claims 1 to 6, characterised in that it is extended beyond its first end (30) by at least two opposed lugs (34) for fastening the tube (10) to a header plate (50) of a fluid header (56).
  8. A heat exchanger, characterised in that it includes a multiplicity of tubes (10) according to one of Claims 1 to 7, disposed parallel to each other and each joined to a fluid header (56) having two longitudinal compartments (58, 60), in such a way that all of the tubes (10) have a first duct (12) connected to a first compartment (58) and a second duct (14) connected to a second compartment (60), so as to permit flow in a U-shaped path in two parallel layers.
  9. A heat exchanger according to Claim 8, characterised in that it further includes corrugated inserts (48) disposed between the tubes (10).
  10. A heat exchanger according to Claim 8 or Claim 9, characterised in that it is assembled together by brazing.
EP96114637A 1995-09-20 1996-09-12 Heat exchanger tube with counter flow channels Expired - Lifetime EP0764823B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9511046A FR2738905B1 (en) 1995-09-20 1995-09-20 HEAT EXCHANGER TUBE WITH COUNTER-CURRENT CIRCULATION CHANNELS
FR9511046 1995-09-20

Publications (2)

Publication Number Publication Date
EP0764823A1 EP0764823A1 (en) 1997-03-26
EP0764823B1 true EP0764823B1 (en) 2000-08-16

Family

ID=9482760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114637A Expired - Lifetime EP0764823B1 (en) 1995-09-20 1996-09-12 Heat exchanger tube with counter flow channels

Country Status (6)

Country Link
US (1) US5762133A (en)
EP (1) EP0764823B1 (en)
JP (1) JPH09170890A (en)
KR (1) KR970016518A (en)
DE (1) DE69609790D1 (en)
FR (1) FR2738905B1 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2771480B1 (en) * 1997-11-24 2000-02-11 Valeo Thermique Moteur Sa DUAL-CHANNEL FLAT TUBE HEAT EXCHANGER
DE19752139B4 (en) * 1997-11-25 2004-06-03 Behr Gmbh & Co. Heat exchanger for a motor vehicle
FR2803378B1 (en) * 1999-12-29 2004-03-19 Valeo Climatisation MULTI-CHANNEL TUBE HEAT EXCHANGER, PARTICULARLY FOR MOTOR VEHICLES
FR2817334B1 (en) * 2000-11-27 2003-05-30 Valeo Thermique Moteur Sa BRAZED HEAT EXCHANGER, PARTICULARLY FOR A MOTOR VEHICLE, AND MANUFACTURING METHOD THEREOF
DE10114078A1 (en) * 2001-03-22 2002-09-26 Modine Mfg Co Heat exchangers and manufacturing processes
US6530514B2 (en) * 2001-06-28 2003-03-11 Outokumpu Oyj Method of manufacturing heat transfer tubes
US6702190B1 (en) 2001-07-02 2004-03-09 Arvin Technologies, Inc. Heat transfer system for a vehicle
DE10147192A1 (en) * 2001-09-25 2003-04-17 Modine Mfg Co Heat exchanger with a finned flat tube block and manufacturing process
AU2002360056A1 (en) * 2001-12-21 2003-07-09 Behr Gmbh And Co. Heat exchanger, particularly for a motor vehicle
DE10201511A1 (en) * 2002-01-17 2003-07-31 Behr Gmbh & Co Welded multi-chamber tube
JP2005121350A (en) * 2003-05-29 2005-05-12 Denso Corp Heat exchanger and method for manufacturing it
FR2864610B1 (en) 2003-12-24 2006-12-22 Valeo Thermique Moteur Sa HEAT EXCHANGER TUBE HAVING TWO CIRCULATING CURRENTS AND HEAT EXCHANGER HAVING SUCH TUBES
US20080164015A1 (en) * 2007-01-04 2008-07-10 Steven James Papapanu Contra-tapered tank design for cross-counterflow radiator
DE112008000781T5 (en) 2007-04-05 2010-06-02 Dana Canada Corp., Oakville heat exchanger assembly
JP2011038736A (en) * 2009-08-17 2011-02-24 Delphi Technologies Inc Countercurrent type heat exchanger assembly
DE102009051881A1 (en) * 2009-11-04 2011-05-05 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Cooling device for an electric machine arrangement
FR3008173B1 (en) * 2013-07-08 2018-11-23 Liebherr-Aerospace Toulouse Sas THERMAL EXCHANGE DEVICE AND METHOD FOR MANUFACTURING SUCH A DEVICE
US10816277B2 (en) 2014-07-21 2020-10-27 Hanon Systems Heat exchanger tubes with fluid communication channels
US10508870B2 (en) * 2016-10-14 2019-12-17 Hanon Systems B-tube reform for improved thermal cycle performance
CN109028647A (en) * 2017-06-12 2018-12-18 重庆帝西科技有限公司 A kind of production method of high-efficient semiconductor refrigerating heat-producing machine external heat exchanger
US10801781B2 (en) 2018-10-17 2020-10-13 Hanon Systems Compliant b-tube for radiator applications

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1451219A1 (en) * 1963-03-30 1969-04-03 Otto Gerhard Plate radiator with flat exterior walls on all sides
US4513811A (en) * 1983-09-09 1985-04-30 Ex-Cell-O Corporation Heat exchanger
DE3440489A1 (en) * 1984-11-06 1986-05-07 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart COOLER, ESPECIALLY FOR THE COOLING SYSTEM OF A COMBUSTION ENGINE OF A MOTOR VEHICLE
SE457476B (en) * 1985-06-18 1988-12-27 Blackstone Sweden PROCEDURE FOR MANUFACTURE OF HEAT EXCHANGE IN WHICH ONE MEDIUM IS GUIDED IN UN-FORMED CHANNELS
JPH0668439B2 (en) * 1986-07-11 1994-08-31 日本電装株式会社 Stacked heat exchanger
US5067235A (en) * 1990-05-04 1991-11-26 Toyo Radiator Co., Ltd. Method for joining heat exchanger tubes with headers
US5125453A (en) * 1991-12-23 1992-06-30 Ford Motor Company Heat exchanger structure
GB2268260A (en) * 1992-06-24 1994-01-05 Llanelli Radiators Ltd Heat exchange tubes formed from a unitary portion of sheet or strip material
US5366006A (en) * 1993-03-01 1994-11-22 Mccord Heat Transfer Corporation Tab joint between coolant tube and header
DE59404311D1 (en) * 1993-07-01 1997-11-20 Thermal Waerme Kaelte Klima Aluminum water / air heat exchanger for motor vehicles

Also Published As

Publication number Publication date
US5762133A (en) 1998-06-09
EP0764823A1 (en) 1997-03-26
JPH09170890A (en) 1997-06-30
KR970016518A (en) 1997-04-28
FR2738905B1 (en) 1997-12-05
DE69609790D1 (en) 2000-09-21
FR2738905A1 (en) 1997-03-21

Similar Documents

Publication Publication Date Title
EP0764823B1 (en) Heat exchanger tube with counter flow channels
EP1192402B1 (en) Multichannel tube heat exchanger, in particular for motor vehicle
EP0434553B1 (en) Plate-like heat-exchanger, especially for a motor car oil cooler
EP2726808B1 (en) Heat exchanger, housing, and air-conditioning circuit including such an exchanger
FR2711236A1 (en) Heat exchanger with two rows of tubes, in particular for a motor vehicle.
FR2834336A1 (en) CIRCUIT ELEMENT FOR A HEAT EXCHANGER, ESPECIALLY A MOTOR VEHICLE AND A HEAT EXCHANGER THUS OBTAINED
FR2746490A1 (en) CONDENSER WITH INTEGRATED TANK FOR REFRIGERATION CIRCUIT
WO2005061980A2 (en) Circuit element for heat exchanger
WO2001050079A2 (en) Evaporator consisting of stacked flat tubes having two opposite fluid boxes
EP0838653A1 (en) Heat exchanger with improved feeding for heating, ventilating and/or air conditioning installations especially for motor vehicles
FR2646749A1 (en) Modular grain drier
WO2000004331A2 (en) Fluid box-manifold assembly for heat exchanger, in particular for motor vehicle
EP1015838B1 (en) Motor vehicle heat exchanger and method for making same
EP1271083B1 (en) Inlet and outlet tube arrangement for evaporator
FR2751403A1 (en) Counterflow heat exchanger flat tube
EP3384224A1 (en) Motor vehicle heat exchanger comprising a header tank
EP1265045B1 (en) High refrigeration power evaporator for vehicle air conditioning system
EP1546627B1 (en) Plate heat exchanger, in particular for motor vehicles
FR2809482A1 (en) Tube matrix for motor vehicle heat exchanger has alternating first and second plates with folded edges and spacers to define crossing fluid flow channels
FR2755220A1 (en) Refrigeration heat exchanger collector box with integral reservoir for automobile
WO2005108138A1 (en) Separately controllable by compartment areas heating, ventilating and/or air conditioning device for the passenger compartment of a vehicle
FR2755221A1 (en) HEAT EXCHANGER INCLUDING DOUBLE CHANNEL TUBES, ESPECIALLY FOR MOTOR VEHICLES
FR2759447A1 (en) Automobile air conditioner condenser
WO2004102103A2 (en) Heat exchanger which is intended, in particular, for a motor vehicle
FR2997486A1 (en) 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

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): DE ES GB IT

17P Request for examination filed

Effective date: 19970818

17Q First examination report despatched

Effective date: 19980803

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

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

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;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: 20000816

Ref country code: ES

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

Effective date: 20000816

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

Effective date: 20000816

REF Corresponds to:

Ref document number: 69609790

Country of ref document: DE

Date of ref document: 20000921

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: 20001116

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20001117

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

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

Effective date: 20001116

26N No opposition filed