EP1176378A1 - Process for manufacturing a fin for a heat exchanger, fins according to said process and heat exchange module with such fins - Google Patents

Process for manufacturing a fin for a heat exchanger, fins according to said process and heat exchange module with such fins Download PDF

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Publication number
EP1176378A1
EP1176378A1 EP01116799A EP01116799A EP1176378A1 EP 1176378 A1 EP1176378 A1 EP 1176378A1 EP 01116799 A EP01116799 A EP 01116799A EP 01116799 A EP01116799 A EP 01116799A EP 1176378 A1 EP1176378 A1 EP 1176378A1
Authority
EP
European Patent Office
Prior art keywords
slots
fins
heat exchange
metal strip
exchangers
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.)
Granted
Application number
EP01116799A
Other languages
German (de)
French (fr)
Other versions
EP1176378B1 (en
Inventor
Carlos Martins
Jean-Claude Malgouries
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 EP1176378A1 publication Critical patent/EP1176378A1/en
Application granted granted Critical
Publication of EP1176378B1 publication Critical patent/EP1176378B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—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
    • F28F1/126—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 consisting of zig-zag shaped fins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • 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
    • F28D2021/0084—Condensers
    • 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
    • F28D2021/0091—Radiators
    • F28D2021/0094—Radiators for recooling the engine coolant
    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F28F2009/004—Common frame elements for multiple cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/02—Arrangements of fins common to different heat exchange sections, the fins being in contact with different heat exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/12—Fins with U-shaped slots for laterally inserting conduits
    • 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
    • Y10T29/49377—Tube with heat transfer means
    • Y10T29/49378—Finned tube
    • Y10T29/4938—Common fin traverses plurality of tubes

Definitions

  • the invention relates to heat exchangers, in particular for motor vehicles.
  • a fin for a heat exchange module which includes at least two heat exchangers comprising each a body provided with fluid circulation tubes and further comprising cooling fins common to the exchangers, the fin being constituted by a metal strip having a width divided into at least two heat exchange zones by at least one set of lights longitudinal spaced from each other.
  • heat exchangers There are two main technologies for making heat exchangers for motor vehicles.
  • the constituent parts of the exchanger are assembled, then joined together in a single operation brazing.
  • the fins are made up corrugated tabs arranged between the tubes and parallel to these.
  • the component parts of the exchanger are assembled exclusively by mechanical means such as crimping.
  • This type of exchanger has thin and flat fins arranged perpendicular to the circulation tubes.
  • a motor vehicle has several heat exchangers, for example a cooling radiator of the motor, a condenser forming part of a circuit air conditioning, and possibly an air cooler or an oil cooler. It is advantageous to group these exchangers in a single module which can be mounted in the vehicle in one operation.
  • Such exchange modules then advantageously include common fins and are crossed by the same flow air.
  • the fact that the fins are common to the different exchangers simplifies the manufacturing and also allows make the whole more compact.
  • the subject of the invention is precisely a manufacturing process fins for a heat exchange module comprising several exchangers which suppresses the production of material falls.
  • the fin can be made from a metal strip narrower in width, which also leads to reduction of its manufacturing cost.
  • stampings are formed between the longitudinal slots and these stamps are flattened to widen the slits and form the lights.
  • At least one series of slots distributed in two spaced parallel rows from each other across the width of the strip metallic, and we stretch the metallic strip in the direction of its width to widen the slits and form the lights.
  • the slots in the two rows overlap partially along the longitudinal direction of the metal strip.
  • the invention also relates to a fin for a module.
  • heat exchange system comprising at least two heat exchangers heat each comprising a body provided with circulation tubes of fluid and further comprising fins cooling common to exchangers. This fin is obtained by the process of the invention.
  • the invention relates to a heat exchange module comprising at least two heat exchangers comprising each a body provided with fluid circulation tubes and further comprising cooling fins common to exchangers.
  • the fins are obtained by the method of the invention.
  • the heat exchange module shown in Figure 1 is consisting of a radiator 1 for cooling an engine motor vehicle and an air conditioning condenser 2, these two exchangers being generally planar.
  • the radiator 1 consists in a known manner of a beam of vertical fluid circulation tubes 5 mounted between two manifolds 6 (only one box has been shown), the manifolds 6 being arranged along two parallel sides of the tube bundle and fitted with tubing 8 inlet and outlet of the coolant.
  • the condenser 2 also consists of a bundle of vertical fluid circulation tubes 10 mounted between two manifolds 12 (only one box has been shown), the manifolds being arranged along two sides beam parallel and fitted with inlet pipes and coolant outlet (not shown).
  • the fins of the heat exchange module are common to two exchangers. In one embodiment they are formed by spacers 30 of corrugated sheet disposed between tubes 5 and 10.
  • the manifold 6 of the exchanger 1 ( Figure 1) is formed from metal sheets, advantageously in aluminum, conformed by conventional operations of cutting and stamping. It has a bottom 32 which is generally flat and elongated rectangular. This background 32 is intended to constitute the collector plate, again called “hole plate”, from the manifold 6. It has for this purpose a plurality of spaced holes 34 of elongated shape intended to receive the tubes 5 of the exchanger 1.
  • the manifold 6 further comprises two sides side 36 folded opposite which are generally flat and parallel to each other. These sides 36 are substantially connected perpendicular to the bottom 32 by two lines of folding which are parallel to each other. Tubing 8 is fitted in one of the lateral flanks 36.
  • the manifold 6 is closed by a metal strip 37 of given width which has parallel generators. This strip 37 can come to fit between the sides side 36 of the manifold 6 to form a set ready to be soldered together with tubing 8.
  • the manifold 12 of the exchanger 2 has the form general of an elongated cylinder with perforations 39 intended to receive the tubes 10 of the exchanger.
  • FIG. 2 shows a strip of metal sheet 14 of great length intended for the realization of a fin 30 for a heat module such as the one shown in FIG. 1.
  • the metal strip 14 has a width L1 which is divided into a first heat exchange zone 18 and a second heat exchange zone 20 by a series of longitudinal slots 22 made in the sheet metal strip 14.
  • the sheet metal strip 14 is divided into as many exchange zones heat exchangers in the module. Given that the module of Figure 1 has two exchangers, know the radiator 1 and the condenser 2, the strip 14 is divided into two heat exchange zones 18 and 20.
  • the heat exchange module could include three exchangers, for example a cooler charge air in addition to radiator 1 and condenser 2. In this case the metal strip 14 would be divided into three heat exchange zones by two series longitudinal slots 22.
  • the widths of the zones 18 and 20 do not are not necessarily equal.
  • the width of each of these zones corresponds to the width of the circulation tubes of fluid from each of the exchangers. If the radiator tubes 1 are longer than the condenser 2 tubes, the area heat exchange 18 intended to establish an exchange of heat with the radiator tubes 1 will be longer than the heat exchange zone 20 intended to establish an exchange of heat with condenser tubes 2.
  • the slots 22 do not extend over the entire length of the metal strip 14. On the contrary, they are spaced apart from each other by areas in which there is still material. In the embodiment shown in the Figure 2, stampings 24 are practiced (see Figure 3A) in these areas of matter. Conversely, it is possible to train first the stamps, then make the slots 22 between stamped. The stampings 24 are then flattened so to space the lips of the slots 22 from one another and to form lights 26 separated from each other by sheet metal tabs 28, as shown in FIGS. 3B and 4. Note that, unlike the process of the prior art, lights 26 were not made by removal material but by a widening of the sheet metal strip 14 across its width. The latter thus presents a width L2 very slightly greater than its initial width L1, this increase in width corresponding to the width lights 26.
  • the sheet metal strip 14 is corrugated in a known manner so as to form an interlayer corrugated 30 as shown in Figure 5.
  • This interlayer is divided into two heat exchange zones 18 and 20 by the lights 26 which are interrupted at regular intervals by the sheet metal tabs 28 which ensure the mechanical strength of the interlayer.
  • FIG. 7 shows a strip of sheet metal 32 divided in two heat exchange zones 18 and 20 by a series of longitudinal slots 22.
  • the slots 22 are not arranged in the extension of one another, as in the variant of FIGS. 2 to 6, but distributed in two parallel rows spaced from each other in the direction of the width of the strip 32.
  • the slots 22 belonging to each of the two overlapping rows partially at each of their ends. They demarcate thus, between these ends, thin sheet metal tongues 34.
  • the strip 32 is stretched in the direction of its width L1 in a series of rollers producing a separation of the two exchange surfaces 18 and 20 and therefore a spacing of the lips of the slots 22. It as a result, the strip then has a width L2 greater to L1.
  • Lights 26 extending longitudinally are thus formed and shifted alternately left and right one by compared to each other and separated from each other by sheet metal tabs 34.
  • the sheet metal strip 32 is then corrugated so as to form a known interlayer corrugated 38 as shown in FIG. 9.
  • Tab 38 is divided into two areas for the exchange of heat 18 and 20 separated from each other by lights 26 interrupted at regular intervals by the tabs of sheet 34 arranged obliquely to the longitudinal axis sheet metal strip 32, as can be seen on the figure 10. This avoids, as far as possible, a thermal bridge is established between the exchange zones of heat 18 and 20. Note that in this embodiment also, the lights 26 are obtained without removal of matter, which is a huge benefit because it avoids having to manage such falls during manufacturing of tab 38.
  • heat exchange comprising brazed type exchangers.
  • the invention also applies to exchangers crimp type, mechanically assembled.
  • the fins are formed by thin strips of sheet metal arranged perpendicular to the circulation tubes fluid.
  • the latter are divided identically, in two zones by at least one series of longitudinal slots interrupted at regular intervals by tabs of way to ensure the mechanical strength of the fin.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

The method for making the shared cooling fins for a heat exchanger comprising two pipes for circulating cooling liquid and which consist of a metal strip divided into two heat exchange zones (18, 20) by longitudinal apertures comprises forming a series of longitudinal slits (22) in a metal strip (14). These are then enlarged to form the apertures. An Independent claim is included for a heat exchanger module containing the fins.

Description

L'invention concerne les échangeurs de chaleur, en particulier pour les véhicules automobiles.The invention relates to heat exchangers, in particular for motor vehicles.

Elle concerne plus particulièrement un procédé de fabrication d'une ailette pour un module d'échange de chaleur qui comprend au moins deux échangeurs de chaleur comportant chacun un corps muni de tubes de circulation de fluide et comprenant, en outre, des ailettes de refroidissement communes aux échangeurs, l'ailette étant constituée par une bande métallique ayant une largeur divisée en au moins deux zones d'échange de chaleur par au moins une série de lumières longitudinales espacées les unes des autres.It relates more particularly to a manufacturing process a fin for a heat exchange module which includes at least two heat exchangers comprising each a body provided with fluid circulation tubes and further comprising cooling fins common to the exchangers, the fin being constituted by a metal strip having a width divided into at least two heat exchange zones by at least one set of lights longitudinal spaced from each other.

Il existe deux technologies principales de réalisation des échangeurs de chaleur pour véhicules automobiles. Selon une première technologie, les pièces constitutives de l'échangeur sont assemblées, puis solidarisées en une seule opération de brasage. Pour ce type d'échangeur, les ailettes sont constituées d'intercalaires ondulés disposés entre les tubes et parallèlement à ces derniers. Selon une autre technologie, les pièces constitutives de l'échangeur sont assemblées exclusivement par des moyens mécaniques tels que le sertissage. Ce type d'échangeur comporte des ailettes fines et planes disposées perpendiculairement aux tubes de circulation.There are two main technologies for making heat exchangers for motor vehicles. According to one first technology, the constituent parts of the exchanger are assembled, then joined together in a single operation brazing. For this type of exchanger, the fins are made up corrugated tabs arranged between the tubes and parallel to these. According to another technology, the component parts of the exchanger are assembled exclusively by mechanical means such as crimping. This type of exchanger has thin and flat fins arranged perpendicular to the circulation tubes.

Généralement, un véhicule automobile comporte plusieurs échangeurs de chaleur, par exemple un radiateur de refroidissement du moteur, un condenseur faisant partie d'un circuit de climatisation, et, éventuellement, un refroidisseur d'air de suralimentation ou un radiateur d'huile. Il est avantageux de regrouper ces échangeurs dans un module unique qui peut être monté dans le véhicule en une seule opération. Generally, a motor vehicle has several heat exchangers, for example a cooling radiator of the motor, a condenser forming part of a circuit air conditioning, and possibly an air cooler or an oil cooler. It is advantageous to group these exchangers in a single module which can be mounted in the vehicle in one operation.

De tels modules d'échange comportent alors avantageusement des ailettes communes et sont traversés par un même flux d'air. Le fait que les ailettes sont communes aux différents échangeurs simplifie la fabrication et permet en outre de rendre l'ensemble plus compact.Such exchange modules then advantageously include common fins and are crossed by the same flow air. The fact that the fins are common to the different exchangers simplifies the manufacturing and also allows make the whole more compact.

Etant donné que les différents échangeurs qui constituent-le module fonctionnent à des températures différentes, il est nécessaire de délimiter, dans ces ailettes communes, des zones d'échange de chaleur propres à chaque échangeur. A cette fin, il est connu de pratiquer des séries de lumières séparées par de fins intervalles de matière afin d'éviter les ponts thermiques entre les différentes zones d'échange de chaleur de l'ailette. Selon la technique actuellement utilisée, ces lumières sont réalisées par enlèvement de matière, par exemple par poinçonnage de perforation. Ce procédé a pour inconvénient d'engendrer des chutes de matière difficiles à gérer en production et très coûteuses.Since the different exchangers that constitute it module operate at different temperatures it's necessary to delimit, in these common fins, heat exchange zones specific to each exchanger. AT this end it is known to practice series of lights separated by fine material intervals to avoid thermal bridges between the different exchange zones of heat of the fin. According to the technique currently used, these lights are made by removing material, for example by punching perforation. This disadvantage of the process is that it can cause material to fall difficult to manage in production and very expensive.

L'invention a précisément pour objet un procédé de fabrication d'ailettes pour un module d'échange de chaleur comportant plusieurs échangeurs qui supprime la production de chutes de matière.The subject of the invention is precisely a manufacturing process fins for a heat exchange module comprising several exchangers which suppresses the production of material falls.

Ce résultat est obtenu, conformément à l'invention par le fait que :

  • on pratique au moins une série de fentes longitudinales espacées les unes des autres dans la bande métallique ; et
  • on élargit les fentes longitudinales pour former une série de lumières espacées les unes des autres.
This result is obtained, in accordance with the invention by the fact that:
  • at least one series of longitudinal slots spaced from each other in the metal strip is made; and
  • the longitudinal slots are widened to form a series of lights spaced from each other.

Grâce à ce procédé, les chutes de matière sont supprimées puisque les lumières ne sont pas obtenues par enlèvement de matière, mais par la réalisation d'une fente qui est ensuite élargie pour constituer la lumière. De ce fait, la nécessité de gérer les chutes de matière est supprimée. En outre, l'ailette peut être réalisée à partir d'une bande métallique de largeur plus faible, ce qui conduit également à une réduction de son coût de fabrication. Thanks to this process, the scraps of material are eliminated since the lights are not obtained by removing material, but by making a slit which is then widened to constitute the light. Therefore, the need to manage falling material is removed. In addition, the fin can be made from a metal strip narrower in width, which also leads to reduction of its manufacturing cost.

Selon une première variante du procédé, on forme des emboutis entre les fentes longitudinales et on aplatit ces emboutis pour élargir les fentes et former les lumières.According to a first variant of the process, stampings are formed between the longitudinal slots and these stamps are flattened to widen the slits and form the lights.

Selon une autre variante du procédé, on forme au moins une série de fentes réparties en deux rangées parallèles espacées l'une de l'autre dans le sens de la largeur de la bande métallique, et on étire la bande métallique dans le sens de sa largeur pour élargir les fentes et former les lumières.According to another variant of the process, at least one series of slots distributed in two spaced parallel rows from each other across the width of the strip metallic, and we stretch the metallic strip in the direction of its width to widen the slits and form the lights.

De préférence, les fentes des deux rangées se chevauchent partiellement selon le sens longitudinal de la bande métallique.Preferably, the slots in the two rows overlap partially along the longitudinal direction of the metal strip.

L'invention concerne également une ailette pour un module d'échange de chaleur comprenant au moins deux échangeurs de chaleur comportant chacun un corps muni de tubes de circulation de fluide et comprenant en outre des ailettes de refroidissement communes aux échangeurs. Cette ailette est obtenue par le procédé de l'invention.The invention also relates to a fin for a module. heat exchange system comprising at least two heat exchangers heat each comprising a body provided with circulation tubes of fluid and further comprising fins cooling common to exchangers. This fin is obtained by the process of the invention.

Enfin, l'invention concerne un module d'échange de chaleur comprenant au moins deux échangeurs de chaleur comprenant chacun un corps muni de tubes de circulation de fluide et comportant, en outre, des ailettes de refroidissement communes aux échangeurs. Les ailettes sont obtenues par le procédé de l'invention.Finally, the invention relates to a heat exchange module comprising at least two heat exchangers comprising each a body provided with fluid circulation tubes and further comprising cooling fins common to exchangers. The fins are obtained by the method of the invention.

D'autres caractéristiques et avantages de l'invention apparaítront encore à la lecture de la description qui suit d'exemples de réalisation donnés à titre illustratif en référence aux figures annexées.Other characteristics and advantages of the invention will appear again on reading the description which follows illustrative examples given in reference to the appended figures.

Sur ces figures :

  • la figure 1 est une vue partielle en perspective d'un module d'échange de chaleur constitué de deux échangeurs associés ;
  • la figure 2 est une vue partielle de dessus d'une bande métallique pour la réalisation d'une ailette par le procédé de l'invention ;
  • la figure 3A est une vue partielle en perspective d'un embouti formé entre les fentes de la bande métallique représentée sur la figure 2 ;
  • la figure 3B est une vue partielle en perspective correspondant à la figure 3A, après aplatissement de l'embouti ;
  • la figure 4 est une vue partielle de dessus de la bande métallique représentée sur les figures 1 et 2 à une étape ultérieure du procédé de l'invention ;
  • la figure 5 est une vue en perspective d'une ailette obtenue à partir de la bande métallique représentée sur la figure 4 ;
  • la figure 6 est une vue à échelle agrandie du détail VI de la figure 5 ;
  • la figure 7 est une vue partielle de dessus, similaire à la figure 2, d'une bande métallique pour la réalisation d'une ailette selon une variante du procédé de l'invention ;
  • la figure 8 est une vue partielle de dessus de la bande métallique représentée sur la figure 7 à une étape ultérieure du procédé de l'invention ;
  • la figure 9 est une vue en perspective d'une ailette obtenue à partir de la bande métallique représentée sur la figure 8 ; et
  • la figure 10 est une vue à échelle agrandie du détail X de la figure 9.
In these figures:
  • Figure 1 is a partial perspective view of a heat exchange module consisting of two associated exchangers;
  • Figure 2 is a partial top view of a metal strip for the production of a fin by the method of the invention;
  • Figure 3A is a partial perspective view of a stamped formed between the slots of the metal strip shown in Figure 2;
  • Figure 3B is a partial perspective view corresponding to Figure 3A, after flattening the stamped;
  • Figure 4 is a partial top view of the metal strip shown in Figures 1 and 2 at a later stage of the method of the invention;
  • Figure 5 is a perspective view of a fin obtained from the metal strip shown in Figure 4;
  • Figure 6 is an enlarged view of detail VI of Figure 5;
  • Figure 7 is a partial top view, similar to Figure 2, of a metal strip for producing a fin according to a variant of the method of the invention;
  • Figure 8 is a partial top view of the metal strip shown in Figure 7 at a later stage of the method of the invention;
  • Figure 9 is a perspective view of a fin obtained from the metal strip shown in Figure 8; and
  • FIG. 10 is an enlarged view of detail X of FIG. 9.

Le module d'échange de chaleur représenté sur la figure 1 est constitué d'un radiateur 1 de refroidissement d'un moteur de véhicule automobile et d'un condenseur de climatisation 2, ces deux échangeurs étant généralement plans.The heat exchange module shown in Figure 1 is consisting of a radiator 1 for cooling an engine motor vehicle and an air conditioning condenser 2, these two exchangers being generally planar.

Le radiateur 1 est constitué de façon connue d'un faisceau de tubes verticaux de circulation de fluide 5 montés entre deux boítes collectrices 6 (une seule boíte a été représentée), les boítes collectrices 6 étant disposées le long de deux côtés parallèles du faisceau de tubes et munies de tubulures 8 d'entrée et de sortie du fluide de refroidissement.The radiator 1 consists in a known manner of a beam of vertical fluid circulation tubes 5 mounted between two manifolds 6 (only one box has been shown), the manifolds 6 being arranged along two parallel sides of the tube bundle and fitted with tubing 8 inlet and outlet of the coolant.

Le condenseur 2 est également constitué d'un faisceau de tubes verticaux de circulation de fluide 10 montés entre deux boítes collectrices 12 (une seule boíte a été représentée), les boítes collectrices étant disposées le long de deux côtés parallèles du faisceau et munies de tubulures d'entrée et de sortie du fluide réfrigérant (non représentées).The condenser 2 also consists of a bundle of vertical fluid circulation tubes 10 mounted between two manifolds 12 (only one box has been shown), the manifolds being arranged along two sides beam parallel and fitted with inlet pipes and coolant outlet (not shown).

Les ailettes du module d'échange de chaleur sont communes aux deux échangeurs. Dans un mode de réalisation elles sont constituées par des intercalaires 30 de tôle ondulée disposés entre les tubes 5 et 10.The fins of the heat exchange module are common to two exchangers. In one embodiment they are formed by spacers 30 of corrugated sheet disposed between tubes 5 and 10.

La boíte collectrice 6 de l'échangeur 1 (figure 1) est formée à partir de feuilles métalliques, avantageusement en aluminium, conformées par des opérations classiques de découpage et d'emboutissage. Elle comporte un fond 32 qui est généralement plat et de forme rectangulaire allongée. Ce fond 32 est destiné à constituer la plaque collectrice, encore appelée "plaque à trous", de la boíte collectrice 6. Il comporte à cet effet une pluralité de trous espacés 34 de forme allongée destinés à recevoir les tubes 5 de l'échangeur 1. La boíte collectrice 6 comprend en outre deux flancs latéraux 36 repliés en vis-à-vis qui sont généralement plans et parallèles entre eux. Ces flancs 36 se raccordent sensiblement perpendiculairement au fond 32 par deux lignes de pliage qui sont parallèles entre elles. La tubulure 8 est aménagée dans l'un des flancs latéraux 36. The manifold 6 of the exchanger 1 (Figure 1) is formed from metal sheets, advantageously in aluminum, conformed by conventional operations of cutting and stamping. It has a bottom 32 which is generally flat and elongated rectangular. This background 32 is intended to constitute the collector plate, again called "hole plate", from the manifold 6. It has for this purpose a plurality of spaced holes 34 of elongated shape intended to receive the tubes 5 of the exchanger 1. The manifold 6 further comprises two sides side 36 folded opposite which are generally flat and parallel to each other. These sides 36 are substantially connected perpendicular to the bottom 32 by two lines of folding which are parallel to each other. Tubing 8 is fitted in one of the lateral flanks 36.

La boíte collectrice 6 est fermée par un feuillard métallique 37 de largeur donnée qui possède des génératrices parallèles. Ce feuillard 37 peut venir s'emboíter entre les flancs latéraux 36 de la boíte collectrice 6 pour former un ensemble prêt à être brasé en même temps que la tubulure 8.The manifold 6 is closed by a metal strip 37 of given width which has parallel generators. This strip 37 can come to fit between the sides side 36 of the manifold 6 to form a set ready to be soldered together with tubing 8.

La boíte collectrice 12 de l'échangeur 2 présente la forme générale d'un cylindre allongé muni de perforations 39 destinées à recevoir les tubes 10 de l'échangeur.The manifold 12 of the exchanger 2 has the form general of an elongated cylinder with perforations 39 intended to receive the tubes 10 of the exchanger.

On a représenté sur la figure 2 une bande de tôle métallique 14 de grande longueur destinée à la réalisation d'une ailette 30 pour un module de chaleur tel que celui qui est représenté sur la figure 1. La bande métallique 14 a une largeur L1 qui est divisée en une première zone d'échange de chaleur 18 et une seconde zone d'échange de chaleur 20 par une série de fentes longitudinales 22 pratiquées dans la bande de tôle 14. La bande de tôle 14 est divisée en autant de zones d'échange de chaleur qu'il y a d'échangeurs dans le module. Étant donné que le module de la figure 1 comporte deux échangeurs, à savoir le radiateur 1 et le condenseur 2, la bande 14 est divisée en deux zones d'échange de chaleur 18 et 20. Dans un autre exemple de réalisation, le module d'échange de chaleur pourrait comprendre trois échangeurs, par exemple un refroidisseur d'air de suralimentation en plus du radiateur 1 et du condenseur 2. Dans ce cas la bande métallique 14 serait divisée en trois zones d'échange de chaleur par deux séries de fentes longitudinales 22.FIG. 2 shows a strip of metal sheet 14 of great length intended for the realization of a fin 30 for a heat module such as the one shown in FIG. 1. The metal strip 14 has a width L1 which is divided into a first heat exchange zone 18 and a second heat exchange zone 20 by a series of longitudinal slots 22 made in the sheet metal strip 14. The sheet metal strip 14 is divided into as many exchange zones heat exchangers in the module. Given that the module of Figure 1 has two exchangers, know the radiator 1 and the condenser 2, the strip 14 is divided into two heat exchange zones 18 and 20. In a another embodiment, the heat exchange module could include three exchangers, for example a cooler charge air in addition to radiator 1 and condenser 2. In this case the metal strip 14 would be divided into three heat exchange zones by two series longitudinal slots 22.

On remarquera en outre que les largeurs des zones 18 et 20 ne sont pas nécessairement égales. La largeur de chacune de ces zones correspond à la largeur des tubes de circulation de fluide de chacun des échangeurs. Si les tubes du radiateur 1 sont plus longs que les tubes du condenseur 2, la zone d'échange de chaleur 18 destinée à établir un échange de chaleur avec les tubes du radiateur 1 sera plus longue que la zone d'échange de chaleur 20 destinée à établir un échange de chaleur avec les tubes du condenseur 2. It will also be noted that the widths of the zones 18 and 20 do not are not necessarily equal. The width of each of these zones corresponds to the width of the circulation tubes of fluid from each of the exchangers. If the radiator tubes 1 are longer than the condenser 2 tubes, the area heat exchange 18 intended to establish an exchange of heat with the radiator tubes 1 will be longer than the heat exchange zone 20 intended to establish an exchange of heat with condenser tubes 2.

Les fentes 22 ne s'étendent pas sur toute la longueur de la bande métallique 14. Au contraire, elles sont espacées les unes des autres par des zones dans lesquelles subsiste de la matière. Dans l'exemple de réalisation représenté sur la figure 2, on pratique des emboutis 24 (voir figure 3A) dans ces zones de matière. Inversement, il est possible de former d'abord les emboutis, puis de réaliser les fentes 22 entre les emboutis. Les emboutis 24 sont ensuite aplatis de manière à espacer l'une de l'autre les lèvres des fentes 22 et à former des lumières 26 séparées l'une de l'autre par des languettes de tôle 28, comme représenté sur les figures 3B et 4. On notera que, contrairement au procédé de l'art antérieur, les lumières 26 n'ont pas été réalisées par enlèvement de matière mais par un élargissement de la bande de tôle 14 dans le sens de sa largeur. Cette dernière présente ainsi une largeur L2 très légèrement supérieure à sa largeur initiale L1, cette augmentation de largeur correspondant à la largeur des lumières 26.The slots 22 do not extend over the entire length of the metal strip 14. On the contrary, they are spaced apart from each other by areas in which there is still material. In the embodiment shown in the Figure 2, stampings 24 are practiced (see Figure 3A) in these areas of matter. Conversely, it is possible to train first the stamps, then make the slots 22 between stamped. The stampings 24 are then flattened so to space the lips of the slots 22 from one another and to form lights 26 separated from each other by sheet metal tabs 28, as shown in FIGS. 3B and 4. Note that, unlike the process of the prior art, lights 26 were not made by removal material but by a widening of the sheet metal strip 14 across its width. The latter thus presents a width L2 very slightly greater than its initial width L1, this increase in width corresponding to the width lights 26.

Dans une étape suivante du procédé, la bande de tôle 14 est ondulée de manière connue de manière à former un intercalaire ondulé 30 comme représenté sur la figure 5. Cet intercalaire est divisé en deux zones d'échanges de chaleur 18 et 20 par les lumières 26 qui sont interrompues à intervalles réguliers par les languettes de tôle 28 qui permettent d'assurer la tenue mécanique de l'intercalaire.In a following step of the process, the sheet metal strip 14 is corrugated in a known manner so as to form an interlayer corrugated 30 as shown in Figure 5. This interlayer is divided into two heat exchange zones 18 and 20 by the lights 26 which are interrupted at regular intervals by the sheet metal tabs 28 which ensure the mechanical strength of the interlayer.

On évite ainsi un pont thermique entre les zones d'échanges de chaleur 18 et 20, l'échange de chaleur ne pouvant se faire que par les languettes de tôle 28 dont la longueur est très réduite par rapport à l'ensemble de la longueur de l'intercalaire.This avoids a thermal bridge between the exchange zones heat 18 and 20, the heat exchange can not be done only by the sheet metal tabs 28 whose length is very reduced compared to the entire length of tab.

On a représenté sur la figure 7 une bande de tôle 32 divisée en deux zones d'échange de chaleur 18 et 20 par une série de fentes longitudinales 22. Dans cette variante, les fentes 22 ne sont pas disposées dans le prolongement l'une de l'autre, comme dans la variante des figures 2 à 6, mais réparties en deux rangées parallèles espacées l'une de l'autre dans le sens de la largeur de la bande 32. En outre, les fentes 22 appartenant à chacune des deux rangées se chevauchent partiellement à chacune de leurs extrémités. Elles délimitent ainsi, entre ces extrémités, de minces languettes de tôle 34. Dans une étape suivante du procédé, la bande 32 est étirée dans le sens de sa largeur L1 dans une série de galets produisant un écartement des deux surfaces d'échange 18 et 20 et par conséquent un écartement des lèvres des fentes 22. Il en résulte que la bande possède alors une largeur L2 supérieure à L1.FIG. 7 shows a strip of sheet metal 32 divided in two heat exchange zones 18 and 20 by a series of longitudinal slots 22. In this variant, the slots 22 are not arranged in the extension of one another, as in the variant of FIGS. 2 to 6, but distributed in two parallel rows spaced from each other in the direction of the width of the strip 32. In addition, the slots 22 belonging to each of the two overlapping rows partially at each of their ends. They demarcate thus, between these ends, thin sheet metal tongues 34. In a next step of the process, the strip 32 is stretched in the direction of its width L1 in a series of rollers producing a separation of the two exchange surfaces 18 and 20 and therefore a spacing of the lips of the slots 22. It as a result, the strip then has a width L2 greater to L1.

On forme ainsi des lumières 26 s'étendant longitudinalement et décalées alternativement à gauche et à droite l'une par rapport à l'autre et séparées l'une de l'autre par des languettes de tôle 34. La bande de tôle 32 est ensuite ondulée de manière à réaliser de façon connue un intercalaire ondulé 38 comme représenté sur la figure 9.Lights 26 extending longitudinally are thus formed and shifted alternately left and right one by compared to each other and separated from each other by sheet metal tabs 34. The sheet metal strip 32 is then corrugated so as to form a known interlayer corrugated 38 as shown in FIG. 9.

L'intercalaire 38 est divisé en deux zones d'échange de chaleur 18 et 20 séparées l'une de l'autre par les lumières 26 interrompues à intervalles réguliers par les languettes de tôle 34 disposées obliquement par rapport à l'axe longitudinal de la bande de tôle 32, comme on peut le voir sur la figure 10. On évite ainsi, dans toute la mesure du possible, qu'un pont thermique s'établisse entre les zones d'échange de chaleur 18 et 20. On notera que dans ce mode de réalisation également, les lumières 26 sont obtenues sans enlèvement de matière, ce qui est un avantage considérable parce que cela évite d'avoir à gérer de telles chutes durant la fabrication de l'intercalaire 38.Tab 38 is divided into two areas for the exchange of heat 18 and 20 separated from each other by lights 26 interrupted at regular intervals by the tabs of sheet 34 arranged obliquely to the longitudinal axis sheet metal strip 32, as can be seen on the figure 10. This avoids, as far as possible, a thermal bridge is established between the exchange zones of heat 18 and 20. Note that in this embodiment also, the lights 26 are obtained without removal of matter, which is a huge benefit because it avoids having to manage such falls during manufacturing of tab 38.

En référence aux figures 1 à 10 on a décrit un module d'échange de chaleur comportant des échangeurs de type brasé. Il va de soi que l'invention s'applique également aux échangeurs de type serti, assemblés mécaniquement. Dans de tels échangeurs, les ailettes sont constituées par de fines bandes de tôle disposées perpendiculairement aux tubes de circulation du fluide. Afin d'éviter l'établissement d'un pont thermique entre les deux zones d'échange de chaleur des ailettes, ces dernières sont divisées, de manière identique, en deux zones par au moins une série de fentes longitudinales interrompues à intervalles réguliers par des languettes de manière destinées à assurer la tenue mécanique de l'ailette.With reference to FIGS. 1 to 10, a module has been described. heat exchange comprising brazed type exchangers. It goes without saying that the invention also applies to exchangers crimp type, mechanically assembled. In such exchangers, the fins are formed by thin strips of sheet metal arranged perpendicular to the circulation tubes fluid. To avoid the establishment of a bridge between the two heat exchange zones fins, the latter are divided identically, in two zones by at least one series of longitudinal slots interrupted at regular intervals by tabs of way to ensure the mechanical strength of the fin.

Les deux variantes de réalisation du procédé qui ont été décrites en référence aux figures 2 à 6 et 7 à 10 respectivement s'appliquent de la même manière à la réalisation de telles ailettes. Simplement, les ailettes restent planes et on ne les forme pas en bande de tôle ondulée comme pour un échangeur de type brasé. En revanche, ces ailettes doivent être perforées pour permettre le passage des tubes des échangeurs 1 et 2.The two variant embodiments of the process which have been described with reference to Figures 2 to 6 and 7 to 10 respectively apply in the same way to the realization of such fins. Simply, the fins remain flat and they are not formed into a strip of corrugated iron as for a brazed type heat exchanger. However, these fins must be perforated to allow the passage of the tubes exchangers 1 and 2.

Bien entendu l'invention n'est pas limitée aux formes de réalisation décrites précédemment et s'étend à d'autres variantes.Of course, the invention is not limited to the forms of realization described above and extends to other variants.

Claims (6)

Procédé de fabrication d'une ailette pour un module d'échange de chaleur qui comprend au moins deux échangeurs de chaleur (1, 2) munis de tubes de circulation de fluide et comprenant en outre des ailettes de refroidissement (30, 38) communes aux échangeurs (1, 2), l'ailette (30, 38) étant constituée par une bande métallique (14, 32) ayant une largeur (L1) divisée en au moins deux zones d'échange de chaleur (18, 20) par au moins une série de lumières longitudinales (26) espacées les unes des autres, caractérisé en ce que : on pratique au moins une série de fentes longitudinales (22) espacées les unes des autres dans la bande métallique (14, 32); et on élargit les fentes longitudinales (22) pour former une série de lumières (26) espacées les unes des autres. Method of manufacturing a fin for a heat exchange module which comprises at least two heat exchangers (1, 2) provided with fluid circulation tubes and further comprising cooling fins (30, 38) common to exchangers (1, 2), the fin (30, 38) being constituted by a metal strip (14, 32) having a width (L1) divided into at least two heat exchange zones (18, 20) by at minus a series of longitudinal lights (26) spaced from each other, characterized in that : at least one series of longitudinal slots (22) spaced from each other in the metal strip (14, 32) are made; and the longitudinal slots (22) are widened to form a series of slots (26) spaced apart from one another. Procédé selon la revendication 1, caractérisé en ce qu'on forme des emboutis (24) entre les fentes longitudinales (22) et en ce qu'on aplatit ces emboutis (24) pour élargir les fentes (22) et former les lumières (26).Method according to Claim 1, characterized in that stampings (24) are formed between the longitudinal slots (22) and that these stampings (24) are flattened to widen the slots (22) and form the slots (26 ). Procédé selon la revendication 1, caractérisé en ce qu'on forme au moins une série de fentes (22) réparties en deux rangées parallèles espacées l'une de l'autre dans le sens de la largeur (L1) de la bande métallique (32), et en ce qu'on étire la bande métallique (32) dans le sens de sa largeur (L1) pour élargir les fentes (22) et former les lumières (26).Method according to claim 1, characterized in that at least one series of slots (22) is formed, distributed in two parallel rows spaced apart from each other in the width direction (L1) of the metal strip (32 ), and in that the metal strip (32) is stretched in the direction of its width (L1) to widen the slots (22) and form the slots (26). Procédé selon la revendication 3, caractérisé en ce que les fentes (22) des deux rangées se chevauchent partiellement selon le sens longitudinal de la bande métallique (32).Method according to claim 3, characterized in that the slots (22) of the two rows partially overlap in the longitudinal direction of the metal strip (32). Ailette pour un module d'échange de chaleur comprenant au moins deux échangeurs de chaleur (1, 2) munis de tubes de circulation de fluide et comprenant en outre des ailettes de refroidissement (30, 38) communes aux échangeurs (1 ,2), caractérisée en ce qu'elle est obtenue par un procédé selon l'une des revendications 1 à 4. Fin for a heat exchange module comprising at least two heat exchangers (1, 2) provided with fluid circulation tubes and further comprising cooling fins (30, 38) common to the exchangers (1, 2), characterized in that it is obtained by a process according to one of claims 1 to 4. Module d'échange de chaleur comprenant au moins deux échangeurs de chaleur (1, 2) comportant chacun un corps muni de tubes de circulation de fluide et comprenant en outre des ailettes (30, 38) de refroidissement communes aux deux échangeurs (1, 2), caractérisé en ce que les ailettes (30, 38) sont obtenues par un procédé selon l'une des revendications 1 à 4.Heat exchange module comprising at least two heat exchangers (1, 2) each comprising a body provided with fluid circulation tubes and further comprising cooling fins (30, 38) common to the two exchangers (1, 2 ), characterized in that the fins (30, 38) are obtained by a method according to one of claims 1 to 4.
EP01116799A 2000-07-25 2001-07-23 Process for manufacturing a fin for a heat exchanger, fins according to said process and heat exchange module with such fins Expired - Lifetime EP1176378B1 (en)

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FR0009724A FR2812382B1 (en) 2000-07-25 2000-07-25 METHOD FOR MANUFACTURING A HEAT EXCHANGER FIN, FINS ACCORDING TO THE METHOD AND EXCHANGE MODULE COMPRISING THESE FINS

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832789A1 (en) * 2001-11-27 2003-05-30 Valeo Thermique Moteur Sa Automobile heat exchanger fin module comprise plane metal plate divided into two parts by long slots between which bands of material forming bridges between fin parts extend
WO2003046458A1 (en) * 2001-11-27 2003-06-05 Valeo Thermique Moteur Heat exchanger module fin
FR2849174A1 (en) * 2002-12-23 2004-06-25 Valeo Thermique Moteur Sa Heat exchanger cooling fin is constituted from strip comprising first and second heat exchange zones cooperating respectively with first and second heat exchanger tubes and weakening zone able allowing separation into these zones
WO2004065872A1 (en) * 2002-12-23 2004-08-05 Valeo Thermique Moteur Method of producing a heat exchanger module
EP1647341A2 (en) 2004-10-14 2006-04-19 Behr GmbH & Co. KG Method for making a corrugated fin and heat exchange block containing these corrugated fins
EP1647341A3 (en) * 2004-10-14 2006-05-31 Behr GmbH & Co. KG Method for making a corrugated fin and heat exchange block containing these corrugated fins
DE102007036305A1 (en) 2007-07-31 2009-02-05 Behr Gmbh & Co. Kg Heat-dissipating fins complementing coolant tubes in vehicle engine radiator block, have expanded-metal structure and corrugated form

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MXPA01007481A (en) 2003-05-19
ATE293238T1 (en) 2005-04-15
US6502305B2 (en) 2003-01-07
JP2002102975A (en) 2002-04-09
FR2812382B1 (en) 2003-02-07
DE60109998D1 (en) 2005-05-19
FR2812382A1 (en) 2002-02-01
US20020020519A1 (en) 2002-02-21
EP1176378B1 (en) 2005-04-13

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