EP3140603A1 - Flat tube for heat exchanger - Google Patents

Flat tube for heat exchanger

Info

Publication number
EP3140603A1
EP3140603A1 EP15722500.4A EP15722500A EP3140603A1 EP 3140603 A1 EP3140603 A1 EP 3140603A1 EP 15722500 A EP15722500 A EP 15722500A EP 3140603 A1 EP3140603 A1 EP 3140603A1
Authority
EP
European Patent Office
Prior art keywords
tube
orifice
fin
flanks
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15722500.4A
Other languages
German (de)
French (fr)
Inventor
Erwan ETIENNE
Patrick Boisselle
Samuel BRY
Jean-Philippe Berthome
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Publication of EP3140603A1 publication Critical patent/EP3140603A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements

Definitions

  • the present invention relates to the technical field of heat exchangers for a motor vehicle and relates more specifically to a tube for such an exchanger.
  • the exchanger tubes concerned are so-called "flat" tubes intended to pass through the orifices of a plurality of fins of the heat exchanger. Shaping of the tubes in the exchanger is carried out by expansion in order to press them against the edges of the orifices of the fins.
  • Such a tube comprises two longitudinal flanks facing each other which are curved and have a concave portion (that is to say a portion having a convexity turned towards the inside of the tube), so that the tube has a restricted outer width in a region where the longitudinal flanks are closest to each other.
  • This type of tube, particularly flat, is therefore adapted to be arranged in a heat exchanger whose size is reduced.
  • the present invention is intended in particular to overcome the aforementioned problems by providing a heat exchanger tube whose thermal efficiency is improved.
  • the subject of the invention is a tube for a motor vehicle heat exchanger, having a cross section comprising two opposite longitudinal sides, each side being provided with at least two concave portions.
  • the tube as defined above may further comprise one or more of the following features, taken alone or in combination.
  • the two concave portions are separated by a convex portion.
  • a convex portion is understood in the broad sense, that is to say, without it being necessary for the convex portion to have a particular form.
  • the convex portion is dimensioned so that the internal perimeter of the section has a value greater than at least 2% with respect to the section of a tube whose flanks are rectilinear.
  • the convex portion makes it possible to increase the internal perimeter, also called wet perimeter, of the tube by a value of 2% with respect to a tube having no convexity, which has the effect of increasing the performance of heat exchange of the tube.
  • the sidewalls of the tube are connected to each other by parts of substantially circular or oval shape.
  • a tube length L refers to the maximum distance between the portions of substantially circular shape outside the tube
  • a width ⁇ Tube denotes the smallest distance between the two sides of tube outside of the tube
  • a T m of the tube flatness ratio is defined by the equation
  • the invention also relates to a fin having at least one substantially oblong orifice having an edge provided with two opposite longitudinal flanks, each provided with at least two convex portions.
  • the specific form of such a fin is particularly suitable for preventing elastic return of the sidewalls of the tube after shaping in an orifice of the fin.
  • the two convex portions of the fin are separated by a concave portion.
  • Such a shape contributes to a good cohesion of the flanks of the tube with the orifice of the fin.
  • the invention also relates to a heat exchanger provided with at least one fin having at least one tube as above.
  • An exchanger equipped with fins and tubes as defined above thus has an improved heat exchange efficiency.
  • the invention finally relates to an assembly comprising at least one tube as above and at least one fin in which the tube is configured to be introduced into a hole of the fin with an existing set between the tube and the orifice.
  • FIG. 1 is a sectional view of a tube according to the invention.
  • FIG. 1 is an elevational view of a portion of a fin for receiving a tube of Figure 1.
  • a tube 10 according to the invention before its forming by deformation. It has a cross section of substantially oblong shape with two longitudinal flanks 12 facing each other, each side being provided with at least two concave portions 14.
  • the tube 10 comprises two substantially curved hollow shapes 14.
  • each flank 12 of the tube has a portion in relief arranged between the two recessed shapes 14.
  • the tube 10 is made from a metal alloy adapted to be easily deformed and has a wall of substantially constant thickness e.
  • the tube has a length L tube designating the greatest distance separating the two end portions 16 of substantially circular shape outside the tube and a width ⁇ tube designating the smallest distance between the two flanks 12 of the tube. tube outside the tube.
  • a flatness ratio T, of the tube can be defined by the relation;
  • a fin 20 of generally rectangular shape comprises a plurality of holes 22 arranged in a row of axis N.
  • the holes 22 of a fin 20 are separated in pairs by rows of louvers 24 well known of the person skilled in the art, and whose function is to increase the heat exchange of the fins 20.
  • Each orifice 22 has a cross section of substantially oblong shape with two longitudinal edges 26 facing one another, each edge 26 being provided with at least two convex portions 28. The two convex portions 28 of an edge 26 of the orifice 22 are separated by a concave portion 30. Seen from the inside of the orifice, each longitudinal edge has a recess and two parts in relief.
  • Each orifice 22 of a fin 20 thus has a shape substantially identical to that of a tube 10 but its dimensions are smaller in order to allow threading of the tube inside the orifice 22 before shaping.
  • each orifice is configured to receive a tube as previously described so that an assembly formed by an orifice provided with a tube has a clearance J between the tube and the corresponding receiving orifice.
  • a method of forming a tube 10 according to the invention in a plurality of fins 20 of a heat exchanger will now be described.
  • the tube 10 is positioned in an orifice 22 of at least one fin 20, so that the tube 10 is placed forming a clearance J between the tube and the orifice, said set J n not having a regular value over the entire periphery of the tube.
  • the tube is pressed by expansion of its walls inside the orifice 22 of the fin.

Landscapes

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

Abstract

A tube (10) for a motor vehicle heat exchanger has a cross section comprising two opposite longitudinal flanks (12) each one provided with at least two concave portions (14).

Description

Tube plat pour échangeur de chaleur  Flat tube for heat exchanger
La présente invention concerne le domaine technique des échangeurs de chaleur pour véhicule automobile et porte plus spécifiquement sur un tube pour un tel échangeur. The present invention relates to the technical field of heat exchangers for a motor vehicle and relates more specifically to a tube for such an exchanger.
Les tubes d'échangeurs concernés sont des tubes dits « plats » destinés à traverser les orifices d'une pluralité d'ailettes de l'échangeur de chaleur. Une mise en forme des tubes dans l'échangeur est réalisée par expansion afin de les plaquer contre les bords des orifices des ailettes. The exchanger tubes concerned are so-called "flat" tubes intended to pass through the orifices of a plurality of fins of the heat exchanger. Shaping of the tubes in the exchanger is carried out by expansion in order to press them against the edges of the orifices of the fins.
On connaît déjà du document FR 2 722 563 un tube du type précité qui, avant d'être mis en forme dans l'échangeur, présente une section transversale de forme oblongue sensiblement homologue à celle d'un orifice d'une ailette. Already known from FR 2,722,563 a tube of the aforementioned type which, before being shaped in the exchanger, has an oblong cross section substantially homologous to that of an orifice of a fin.
Un tel tube comporte deux flancs longitudinaux en regard l'un de l'autre qui sont incurvés et présentent une portion concave (c'est-à-dire une portion ayant une convexité tournée vers l'intérieur du tube), si bien que le tube a une largeur extérieure restreinte dans une région où les flancs longitudinaux sont les plus proches l'un de l'autre. Ce type de tube, particulièrement plat, est donc adapté pour être agencé dans un échangeur de chaleur dont l'encombrement est réduit. Such a tube comprises two longitudinal flanks facing each other which are curved and have a concave portion (that is to say a portion having a convexity turned towards the inside of the tube), so that the tube has a restricted outer width in a region where the longitudinal flanks are closest to each other. This type of tube, particularly flat, is therefore adapted to be arranged in a heat exchanger whose size is reduced.
Toutefois, après mise en forme d'un tube de ce type dans un échangeur, il a été constaté des problèmes de cohésion entre les flancs longitudinaux du tube et les orifices des ailettes. De tels tubes sont sujets à un retour élastique de leurs flancs après mise en forme dans les orifices des ailettes. Ce retour élastique des flancs du tube crée un jeu entre les flancs et les orifices des ailettes qui a pour effet de dégrader la conduction de chaleur entre le tube et les ailettes. De telles déficiences ont donc un impact négatif sur le rendement thermique global de l'échangeur. However, after forming a tube of this type in an exchanger, it was found problems of cohesion between the longitudinal sides of the tube and the orifices of the fins. Such tubes are subject to an elastic return of their flanks after shaping in the orifices of the fins. This elastic return of the flanks of the tube creates a clearance between the flanks and the orifices of the fins which has the effect of degrading the heat conduction between the tube and the fins. Such deficiencies therefore have a negative impact on the overall heat efficiency of the exchanger.
La présente invention a notamment pour but de surmonter les problèmes précités en proposant un tube d'échangeur de chaleur dont le rendement thermique est amélioré. The present invention is intended in particular to overcome the aforementioned problems by providing a heat exchanger tube whose thermal efficiency is improved.
A cet effet, l'invention a pour objet un tube pour un échangeur de chaleur de véhicule automobile, présentant une section transversale comportant deux flancs longitudinaux opposés, chaque flanc étant muni d'au moins deux portions concaves. For this purpose, the subject of the invention is a tube for a motor vehicle heat exchanger, having a cross section comprising two opposite longitudinal sides, each side being provided with at least two concave portions.
FEU I LLE DE REM PLACE ENT (RÈG LE 26) Ainsi on propose un tube particulièrement plat qui présente des dimensions adaptées pour être monté dans un échangeur de chaleur d'encombrement réduit tout en supprimant les problèmes de cohésion entre les flancs du tube et l'orifice de l'ailette. De manière surprenante, les inventeurs ont remarqué que cette forme particulière de tube permet d'éviter un retour élastique des flancs du tube après sa mise en forme par expansion. En effet, après mise en forme d'un tube, les flancs du tube demeurent plaqués contre les bords de l'orifice et évitent le problème d'apparition d'un jeu entre les orifices des ailettes et les flancs du tube. La conduction de chaleur entre les ailettes et le tube est donc optimisée, ce qui améliore ainsi le rendement thermique de l'échangeur. FIRE I LLE OF REM PLACE ENT (RULE 26) Thus a particularly flat tube is proposed which has dimensions adapted to be mounted in a heat exchanger compact space while eliminating the problems of cohesion between the sides of the tube and the orifice of the fin. Surprisingly, the inventors have noticed that this particular form of tube makes it possible to avoid an elastic return of the flanks of the tube after it has been shaped by expansion. Indeed, after forming a tube, the sides of the tube remain pressed against the edges of the orifice and avoid the problem of occurrence of a clearance between the orifices of the fins and the sidewalls of the tube. The heat conduction between the fins and the tube is optimized, thereby improving the heat efficiency of the exchanger.
Le tube tel que défini ci-dessus peut en outre comporter l'une ou plusieurs des caractéristiques suivantes, prises seules ou en combinaison. The tube as defined above may further comprise one or more of the following features, taken alone or in combination.
- Selon l'invention, les deux portions concaves sont séparées par une portion convexe. Une telle forme s'entend au sens large, c'est-à-dire sans qu'il soit requis que la portion convexe ait une forme particulière. According to the invention, the two concave portions are separated by a convex portion. Such a form is understood in the broad sense, that is to say, without it being necessary for the convex portion to have a particular form.
- la portion convexe est dimensionnée de manière que le périmètre interne de la section a une valeur plus grande d'au moins 2% par rapport à la section d'un tube dont les flancs seraient rectilignes. Ainsi, la portion convexe permet d'augmenter le périmètre interne, également appelé périmètre mouillé, du tube d'une valeur de 2 % par rapport à un tube ne présentant pas de convexité, ce qui a pour effet d'augmenter la performance d'échange thermique du tube. the convex portion is dimensioned so that the internal perimeter of the section has a value greater than at least 2% with respect to the section of a tube whose flanks are rectilinear. Thus, the convex portion makes it possible to increase the internal perimeter, also called wet perimeter, of the tube by a value of 2% with respect to a tube having no convexity, which has the effect of increasing the performance of heat exchange of the tube.
- Par exemple, les flancs du tube sont raccordés entre eux par des parties de forme sensiblement circulaire ou encore ovale. For example, the sidewalls of the tube are connected to each other by parts of substantially circular or oval shape.
- On peut prévoir que, selon la section transversale du tube, une longueur LTube désigne la plus grande distance entre les parties de forme sensiblement circulaires à l'extérieur du tube, une largeur \Tube désigne la plus petite distance entre les deux flancs du tube à l'extérieur du tube, et un rapport de planéité Tf du tube est défini par la relation ; Τ — Tube - It is expected that, in the transverse section of the tube, a tube length L refers to the maximum distance between the portions of substantially circular shape outside the tube, a width \ Tube denotes the smallest distance between the two sides of tube outside of the tube and a T m of the tube flatness ratio is defined by the equation; Τ - Tube
^Tube  ^ Tube
dans lequel le coefficient de planéité Tf est strictement inférieur à 0,20 à ± 0,01 .  wherein the flatness coefficient Tf is strictly less than 0.20 to ± 0.01.
- L'invention a également pour objet une ailette comportant au moins un orifice de forme sensiblement oblongue qui comporte un bord muni de deux flancs longitudinaux opposés, chacun muni d'au moins deux portions convexes. La forme spécifique d'une telle ailette est particulièrement appropriée pour éviter un retour élastique des flancs du tube après mise en forme dans un orifice de l'ailette. - The invention also relates to a fin having at least one substantially oblong orifice having an edge provided with two opposite longitudinal flanks, each provided with at least two convex portions. The specific form of such a fin is particularly suitable for preventing elastic return of the sidewalls of the tube after shaping in an orifice of the fin.
- On peut prévoir que les deux portions convexes de l'ailette sont séparées par une portion concave. Une telle forme participe à une bonne cohésion des flancs du tube avec l'orifice de l'ailette. It can be provided that the two convex portions of the fin are separated by a concave portion. Such a shape contributes to a good cohesion of the flanks of the tube with the orifice of the fin.
- L'invention a encore pour objet un échangeur de chaleur muni d'au moins une ailette comportant au moins un tube tel que ci-dessus. Un échangeur muni des ailettes et des tubes tel que définis ci-avant présente ainsi un rendement d'échange thermique amélioré. - The invention also relates to a heat exchanger provided with at least one fin having at least one tube as above. An exchanger equipped with fins and tubes as defined above thus has an improved heat exchange efficiency.
- L'invention a enfin pour objet un ensemble comprenant au moins un tube tel que ci-dessus et au moins une ailette dans lequel le tube est configuré pour être introduit à l'intérieur d'un orifice de l'ailette avec un jeu existant entre le tube et l'orifice. - The invention finally relates to an assembly comprising at least one tube as above and at least one fin in which the tube is configured to be introduced into a hole of the fin with an existing set between the tube and the orifice.
L'invention sera mieux comprise à la lecture des figures annexées, qui sont fournies à titre d'exemples et ne présentent aucun caractère limitatif, dans lesquelles : The invention will be better understood on reading the appended figures, which are provided by way of examples and are in no way limiting, in which:
- La figure 1 est une vue en coupe d'un tube selon l'invention.  - Figure 1 is a sectional view of a tube according to the invention.
- La figure 2 est une vue en élévation d'une portion d'une ailette destinée à recevoir un tube de la figure 1 .  - Figure 2 is an elevational view of a portion of a fin for receiving a tube of Figure 1.
En référence à la figure 1 , on a représenté un tube 10 selon l'invention avant sa mise en forme par déformation. Celui-ci présente une section transversale de forme sensiblement oblongue comportant deux flancs longitudinaux 12 en regard l'un de l'autre, chaque flanc étant muni d'au moins deux portions concaves 14. En d'autres termes, vu de l'extérieur du tube, le tube 10 comporte deux formes en creux 14 sensiblement courbées. Referring to Figure 1, there is shown a tube 10 according to the invention before its forming by deformation. It has a cross section of substantially oblong shape with two longitudinal flanks 12 facing each other, each side being provided with at least two concave portions 14. In other terms, seen from the outside of the tube, the tube 10 comprises two substantially curved hollow shapes 14.
Les deux flancs longitudinaux 12 sont raccordés l'un à l'autre par deux parties d'extrémité 16 de forme circulaire. Dans l'exemple, une portion convexe 18 est agencée entre les deux portions concaves 14 de chaque flanc longitudinal 12. Ainsi, observé depuis l'extérieur, chaque flanc 12 du tube présente une partie en relief agencée entre les deux formes en creux 14. The two longitudinal flanks 12 are connected to one another by two end portions 16 of circular shape. In the example, a convex portion 18 is arranged between the two concave portions 14 of each longitudinal flank 12. Thus, observed from the outside, each flank 12 of the tube has a portion in relief arranged between the two recessed shapes 14.
Le tube 10 est fabriqué à partir d'un alliage métallique adapté pour être déformé facilement et possède une paroi d'épaisseur e sensiblement constante. The tube 10 is made from a metal alloy adapted to be easily deformed and has a wall of substantially constant thickness e.
Selon la section transversale le tube présente une longueur LTube désignant la plus grande distance séparant les deux parties d'extrémité 16 de forme sensiblement circulaire à l'extérieur du tube et une largeur \Tube désignant la plus petite distance entre les deux flancs 12 du tube à l'extérieur du tube. Un rapport de planéité T, du tube peut être défini par la relation ; According to the cross section the tube has a length L tube designating the greatest distance separating the two end portions 16 of substantially circular shape outside the tube and a width \ tube designating the smallest distance between the two flanks 12 of the tube. tube outside the tube. A flatness ratio T, of the tube can be defined by the relation;
dans lequel le coefficient de planéité T, est strictement inférieur à 0,20 à ± 0,01 .  wherein the flatness coefficient T, is strictly less than 0.20 to ± 0.01.
En référence à la figure 2, une ailette 20 de forme générale rectangulaire comporte une multiplicité de trous 22 disposés selon une rangée d'axe N. Les trous 22 d'une ailette 20 sont séparés deux à deux par des rangées de persiennes 24 bien connues de l'homme du métier, et dont la fonction est d'augmenter l'échange thermique des ailettes 20. Referring to Figure 2, a fin 20 of generally rectangular shape comprises a plurality of holes 22 arranged in a row of axis N. The holes 22 of a fin 20 are separated in pairs by rows of louvers 24 well known of the person skilled in the art, and whose function is to increase the heat exchange of the fins 20.
Chaque orifice 22 présente une section transversale de forme sensiblement oblongue comportant deux bords longitudinaux 26 en regard l'un de l'autre, chaque bord 26 étant muni d'au moins deux portions convexes 28. Les deux portions convexes 28 d'un bord 26 de l'orifice 22 sont séparées par une portion concave 30. Vu de l'intérieur de l'orifice, chaque bord longitudinal présente un creux et deux parties en relief. Chaque orifice 22 d'une ailette 20 a donc une forme sensiblement identique à celle d'un tube 10 mais ses dimensions sont inférieures afin de permettre un enfilage du tube à l'intérieur de l'orifice 22 avant mise en forme. Ainsi, chaque orifice est configuré pour accueillir un tube tel que précédemment décrit de telle sorte qu'un ensemble formé par un orifice muni d'un tube présente un jeu J entre le tube et l'orifice de réception qui lui correspond. Each orifice 22 has a cross section of substantially oblong shape with two longitudinal edges 26 facing one another, each edge 26 being provided with at least two convex portions 28. The two convex portions 28 of an edge 26 of the orifice 22 are separated by a concave portion 30. Seen from the inside of the orifice, each longitudinal edge has a recess and two parts in relief. Each orifice 22 of a fin 20 thus has a shape substantially identical to that of a tube 10 but its dimensions are smaller in order to allow threading of the tube inside the orifice 22 before shaping. Thus, each orifice is configured to receive a tube as previously described so that an assembly formed by an orifice provided with a tube has a clearance J between the tube and the corresponding receiving orifice.
On va maintenant décrire un procédé de mise en forme d'un tube 10 selon l'invention dans une pluralité d'ailettes 20 d'un échangeur de chaleur. Dans une première étape, on positionne le tube 10 dans un orifice 22 d'au moins une ailette 20, de telle sorte que l'on place le tube 10 en formant un jeu J entre le tube et l'orifice, ledit jeu J n'ayant pas une valeur régulière sur toute la périphérie du tube. Ensuite, on fait plaquer le tube par expansion de ses parois à l'intérieur de l'orifice 22 de l'ailette. A method of forming a tube 10 according to the invention in a plurality of fins 20 of a heat exchanger will now be described. In a first step, the tube 10 is positioned in an orifice 22 of at least one fin 20, so that the tube 10 is placed forming a clearance J between the tube and the orifice, said set J n not having a regular value over the entire periphery of the tube. Then, the tube is pressed by expansion of its walls inside the orifice 22 of the fin.
Le tube et l'ailette présentés ne sont pas limités au mode de réalisation décrit ci- dessus et d'autres modes de réalisation apparaîtront clairement à l'homme du métier. The tube and fin presented are not limited to the embodiment described above and other embodiments will become apparent to those skilled in the art.

Claims

REVENDICATIONS
1 . Tube (10) pour un échangeur de chaleur de véhicule automobile, présentant une section transversale comportant deux flancs longitudinaux (12) opposés, caractérisé en ce que chaque flanc (12) est muni d'au moins deux portions concaves (14). 1. Tube (10) for a motor vehicle heat exchanger, having a cross section having two longitudinal flanks (12) opposite, characterized in that each flank (12) is provided with at least two concave portions (14).
2. Tube selon la revendication précédente dans lequel deux portions concaves (14) sont séparées par une portion convexe (18). 2. Tube according to the preceding claim wherein two concave portions (14) are separated by a convex portion (18).
3. Tube selon la revendication précédente, dans lequel la portion convexe (18) est dimensionnée de manière que le périmètre interne de la section a une valeur plus grande d'au moins 2% par rapport à la section d'un tube dont les flancs seraient rectilignes. 3. Tube according to the preceding claim, wherein the convex portion (18) is dimensioned so that the internal perimeter of the section has a greater value of at least 2% relative to the section of a tube whose flanks would be straight.
4. Tube selon au moins l'une des revendications 1 à 3 dans lequel les flancs (12) du tube (10) sont raccordés entre eux par des parties (16) d'extrémités de forme sensiblement circulaire. 4. Tube according to at least one of claims 1 to 3 wherein the flanks (12) of the tube (10) are interconnected by portions (16) of substantially circular ends.
5. Tube selon la revendication précédente, présentant, selon la section transversale du tube (10), une longueur LTube désignant la plus grande distance à l'extérieur du tube entre les parties de forme sensiblement circulaires, une largeur lTube désignant la plus petite distance entre les deux flancs (12) du tube à l'extérieur du tube, et un rapport de planéité T, du tube définit par la relation ; 5. Tube according to the preceding claim, having, in the cross section of the tube (10), a length L tube designating the greatest distance outside the tube between the substantially circular shaped portions, a width l tube designating the most small distance between the two flanks (12) of the tube outside the tube, and a flatness ratio T, of the tube defined by the relation;
dans lequel le coefficient de planéité Tf est inférieur à 0,20 à ± 0,01 .  wherein the flatness coefficient Tf is less than 0.20 to ± 0.01.
6. Ailette (20) comportant au moins un orifice (22) de forme sensiblement oblongue caractérisée en ce que l'orifice (22) comporte un bord muni de deux flancs longitudinaux (26) opposés, chacun muni d'au moins deux portions convexes (28). 6. Wing (20) having at least one orifice (22) of substantially oblong shape characterized in that the orifice (22) has an edge provided with two longitudinal flanks (26) opposite, each provided with at least two convex portions (28).
7. Ailette selon la revendication précédente dans laquelle deux portions convexes (28) sont séparées par une portion concave (30). Echangeur de chaleur muni d'au moins une ailette (20) selon la revendication précédente et comportant au moins un tube (10) selon l'une quelconque des revendications 1 à 5. 7. A fin according to the preceding claim wherein two convex portions (28) are separated by a concave portion (30). Heat exchanger provided with at least one fin (20) according to the preceding claim and comprising at least one tube (10) according to any one of claims 1 to 5.
Ensemble d'au moins un tube (10) selon l'une quelconque des revendications 1 à 5 et d'au moins une ailette (20) selon l'une quelconque des revendications 6 et 7, dans lequel le tube est configuré pour être introduit à l'intérieur d'un orifice (22) de l'ailette (20) avec un jeu (J) existant entre le tube (10) et l'orifice (22). An assembly of at least one tube (10) according to any one of claims 1 to 5 and at least one fin (20) according to any one of claims 6 and 7, wherein the tube is configured to be introduced inside an orifice (22) of the fin (20) with a clearance (J) existing between the tube (10) and the orifice (22).
EP15722500.4A 2014-05-05 2015-05-05 Flat tube for heat exchanger Withdrawn EP3140603A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1454043A FR3020670B1 (en) 2014-05-05 2014-05-05 FLAT TUBE FOR HEAT EXCHANGER
PCT/EP2015/059867 WO2015169808A1 (en) 2014-05-05 2015-05-05 Flat tube for heat exchanger

Publications (1)

Publication Number Publication Date
EP3140603A1 true EP3140603A1 (en) 2017-03-15

Family

ID=51293096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15722500.4A Withdrawn EP3140603A1 (en) 2014-05-05 2015-05-05 Flat tube for heat exchanger

Country Status (8)

Country Link
US (1) US20170067694A1 (en)
EP (1) EP3140603A1 (en)
JP (1) JP2017515087A (en)
KR (1) KR20160145138A (en)
CN (1) CN106461349A (en)
FR (1) FR3020670B1 (en)
MX (1) MX2016014498A (en)
WO (1) WO2015169808A1 (en)

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CN109210964A (en) * 2018-09-30 2019-01-15 珠海格力电器股份有限公司 Heat exchanger and air conditioner comprising same
CN109186302B (en) * 2018-09-30 2024-05-03 珠海格力电器股份有限公司 Fin and heat exchanger with same

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Also Published As

Publication number Publication date
WO2015169808A1 (en) 2015-11-12
FR3020670A1 (en) 2015-11-06
CN106461349A (en) 2017-02-22
KR20160145138A (en) 2016-12-19
US20170067694A1 (en) 2017-03-09
FR3020670B1 (en) 2019-03-22
MX2016014498A (en) 2017-05-23
JP2017515087A (en) 2017-06-08

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