Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
  • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
  • F28D1/04—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
• • 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
  • 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
  • F28F1/128—Fins with openings, e.g. louvered fins
• • 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
• • 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
• • 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

Definitions

• the invention relates to a heat exchange fin, in particular for cooling, a heat exchange module comprising such a fin and a method of manufacturing such a module. It will find its applications in particular in the field of motor vehicles.
• a heat exchange fin in particular for cooling, consisting of a strip comprising a first heat exchange zone, intended to cooperate with tubes of a first heat exchanger, and a second zone d heat exchange, intended to cooperate with tubes of a second heat exchanger.
• heat exchange modules also called multi-exchangers, comprising at least a first and a second exchanger having at least one common component, each exchanger comprising fluid circulation tubes, generally planar and regularly spaced, with which each of the heat exchange zones of the fins cooperates.
• thermo bridges between the exchangers it is necessary to avoid thermal bridges between the exchangers. This need is all the greater as the two exchangers operate at different temperatures.
• An example that may be mentioned is the heat exchange modules of motor vehicles which include a radiator for cooling the engine and a condenser forming part of the air conditioning circuit.
• thermal bridges can be reduced by various means, such as making localized slits, removing material or locally reducing the thickness of the fins. These various means, if they reduce heat exchange, do not however provide perfect thermal insulation as would be the case in the absence of any 4/065872
• the invention specifically relates to a heat exchange fin which overcomes these drawbacks by eliminating the thermal bridge between the different exchangers of a module of heat exchangers.
• the strip constituting said fin comprises a weakening zone, capable of allowing its separation, into a first element comprising said first heat exchange zone and a second element comprising said second heat exchange zone.
• the strip of the fin according to the invention has a wavy shape and the said weakening zone consists of a rectilinear slot, for example obtained by shearing, interrupted at certain of the faces corrugations by at least one residual connection, provided between said first and said second heat exchange zone.
• the faces of the corrugations have a height H and said residual connection, provided at mid-height, 04/065872
• H / 5 has a height h between H / 5 and H / 30, in particular approximately 0.5 mm.
• the fins are flat. They then have perforations into which the tubes are introduced.
• the invention also relates to a heat exchange module comprising at least first and second heat exchangers, each exchanger comprising generally flat, regularly spaced, fluid circulation tubes having a width, characterized in that it comprises fins as described above, said first and second elements of said fins, provided separated from each other, being respectively associated with the tubes of the first and second exchanger.
• Said strip has a width, for example, substantially equal to the sum of the widths of the tubes of the first and second exchangers while said first and said second heat exchange zones of said strip have a width corresponding respectively to the width of the tubes of the first and the second exchanger.
• it may be a heat exchange module without a common component.
• the exchangers will then be subject to each other by added elements.
• said module may be a multi-exchanger. More specifically, said module may further comprise at least one cheek assembled by brazing to the first heat exchange zone and to the second heat exchange zone. 04/065872
• the tubes of the exchangers of said multi-exchanger are offset from one another in a direction orthogonal to said tubes and said cheeks have an offset of equivalent level between the first and the second exchanger.
• said cheeks comprise two parts linked together by deformable links and assembled by brazing respectively to the first and to the second heat exchange zones.
• one of the parts of the cheek joined to one of the heat exchange zones may comprise at least one protrusion secured by brazing to the other heat exchange zone.
• cheeks find their utility in any type of module without it necessarily being modules provided with fins according to the invention. These cheeks indeed have, by their structure, capacities for limiting heat transfers from one exchanger to another.
• the invention also relates to a method of manufacturing a heat exchange module comprising at least two heat exchangers, each exchanger comprising generally flat and regularly spaced fluid circulation tubes, having a width, and cooling elements. associated with these tubes, characterized in that:
• a weakening of the sheet metal strips is carried out in order to limit a first heat exchange zone intended to be associated with the tubes of the first exchanger and a 'second heat exchange zone intended to be 04/065872
• said sheet metal strip constitutes, for example, a fin as defined above.
• the operation of breaking the residual connections is carried out before brazing, during the operation of association of the sheet metal strips with the tubes.
• the sheet metal strips are conformed so as to give them a corrugated shape, the association of sheet metal strips with the tubes of the exchanger being effected by the introduction of corrugated sheet strips between the tubes.
• the corrugated inserts of all the exchangers of the heat exchange module are produced in a single operation, which allows an increase in the manufacturing speed without simultaneous increase in the forming speed.
• the geometrical characteristics of the spacers can be maintained within low manufacturing tolerances, which facilitates their introduction between the tubes without problem of matching.
• said residual bond is produced during the shaping of the sheet metal strips in corrugated form, this by producing a discontinuous slot in the sheet metal strips, by 04/065872
• the weakening of the sheet metal strips may be carried out by removing material or by making longitudinal slots, before shaping.
• the residual connections are broken by displacement of the exchangers relative to one another, in particular according to a shearing movement.
• modules of the multi-exchanger type with common cheeks in the case of non-deformable flat cheeks, they may be assembled in the first and second heat zones, after separation of the latter.
• one of the cheeks may be positioned in abutment against the heat exchange zone of one exchangers and the other pressing against the heat exchange zone of the other exchanger, during the association of the tubes and sheet metal strips. We will then act on said cheeks in two opposite directions, thereby obtaining the desired offset for the tubes and the rupture of the residual connection between the heat exchange zones.
• Figure 1 is a partial perspective view of a fin according to the invention
• Figure 2 illustrates a detail of the area marked II in the figure
• Figure 3 is a perspective view of a module according to the invention
• Figure 4 illustrates in perspective an alternative embodiment of an element of a module according to the invention
• Figure 5 illustrates in perspective a step in a process, according to the invention, for manufacturing a heat exchanger module
• Figure 6 details in a cross-sectional plane the relative position of the various components illustrated in Figure 5, in a first state
• Figure 7 details along a cross-sectional plane the relative position of the various components illustrated in Figure 5, in a second state.
• FIG. 1 and 2 there is shown a heat exchange fin, in particular cooling, according to the invention.
• Said fin consists of a strip 30 comprising a first heat exchange zone 18, intended to cooperate with tubes of a first heat exchanger, and a second heat exchange zone 20, intended to cooperate with tubes of a second heat exchanger.
• Such fins make it possible to ensure a heat exchange between the air and a fluid circulating in the tubes. They are, for example, made of aluminum.
• Each heat exchange zone 18, 20 may be provided with means making it possible to disturb the flow of air, also called louvers 60, 62, known to those skilled in the art. 004/065872
• the configuration of said louvers is adapted to the type of exchanger equipped. They may, for example, be oriented head to tail on either side of an axis of symmetry, this in each heat exchange zone 18, 20.
• the first heat exchange zone 18 it is provided on either side of a first axis of symmetry of the louvers of opposite orientation.
• the second heat exchange zone 20 on either side of a second axis of symmetry.
• the number of louvers in the first heat exchange zone and in the second heat exchange zone may be different.
• said strip comprises a weakening zone 22, capable of allowing its separation into a first element comprising said first heat exchange zone 18 and a second element comprising said second heat exchange zone 20.
• the widths of the zones 18 and 20 are not necessarily equal.
• the width of each of these zones corresponds to the width of the fluid circulation tubes of each of the exchangers with which the fin is intended to cooperate. If the tubes of the first exchanger are wider than the tubes of the second exchanger, the heat exchange zone 18 intended to establish a heat exchange with the tubes of the first exchanger may be wider than the heat exchange zone 20 intended to establish a heat exchange with the tubes of the second exchanger.
• the weakening zone 22 of the fin can thus be offset relative to the axis of symmetry thereof.
• said strip 30 has a wavy shape and said weakening zone 22 consists of a rectilinear slot interrupted at 04/065872
• the ratio of the number of faces with residual link to the number of faces without residual link may vary from 1/7 to 1/20. It could be, in particular, 1/10.
• the two heat exchange zones 18 and 20 are thus separated from each other by openings 26 interrupted at regular intervals by sheet metal tongues 34, in particular perpendicular to the longitudinal axis of the sheet metal strip 30.
• a weakening of the sheet metal strip is thus produced, this weakening leaving residual connections formed by the tongues between the first heat exchange zone 18 and the second heat exchange zone 20.
• Said openings have, for example, a width of less than 0.5 mm, or even 0.3 mm, or even 0.1 mm, or even a width which is zero or not measurable, said weakening resulting from a simple cutting without removing material.
• the faces of the corrugations have, in particular, a height H and said residual bond, has a height h comprised, for example, between H / 5 and H / .30, in particular equal to H / 12. It can be provided at mid-height or on the shelves.
• the heat exchange module shown in Figure 3 consists of a radiator 1 for cooling a motor vehicle engine and an air conditioning condenser 2, these two exchangers being generally planar.
• the radiator 1 consists in a known manner of a bundle of fluid circulation tubes 5 mounted between two manifolds 6 (only one box has been shown), the two manifolds 6 being arranged along two sides 04/065872
• the condenser 2 also consists of a bundle of fluid circulation tubes 10 mounted between two manifolds 12 (only one box has been shown), the manifolds being arranged along two parallel sides of the bundle and provided with tubing d 'inlet and outlet of the refrigerant (not shown).
• the tubes of each of the exchangers are, for example, made of aluminum.
• said module also comprises fins as described above, said first and second elements 64, 66 of said fins, provided separated from one another, being respectively associated with tubes 5, 10 of the first and of the second exchanger.
• the fins of the heat exchange module consist of interleaves of corrugated sheets placed between the tubes 5 and the tubes 10.
• the manifold 6 of the exchanger 1 is formed from metal sheets, advantageously aluminum, shaped by conventional cutting and stamping operations. They have a bottom 80 which is generally flat and of elongated rectangular shape. This bottom is intended to constitute the manifold plate, also called a “hole plate”, of the manifold box 6. It has for this purpose a plurality of spaced apart holes 82 of elongated shape intended to receive the tubes 5 of the exchanger 1.
• the manifold 6 further comprises lateral flanks 36 which are folded opposite which are 04/065872
• the sides 36 are connected substantially perpendicular to the bottom by two fold lines which are parallel to each other.
• the tubing 8 is arranged in one of the lateral flanks 36.
• the manifold 6 is closed by a metal strip of given width which has parallel generators. This strip can come to fit between the lateral flanks 36 of the manifold 6 to form an assembly ready to be brazed at the same time as the tubing 8.
• the manifold 12 of the exchanger 2 has the general shape of an elongated cylinder provided with perforations intended to receive the tubes 10 of the exchanger.
• said heat exchange module according to the invention further comprises at least one cheek 40 assembled by brazing to the first heat exchange zone 18 and to the second heat exchange zone 20.
• Said cheek is constituted, for example, by a metal plate 37 of generally rectangular shape.
• the tubes 5, 10 of the exchangers are offset from one another in a direction orthogonal to the said tubes and the cheeks 40 have an offset 39 of equivalent level between the first and the second exchanger 1,2.
• the module comprises lateral cheeks 46 which are deformable.
• said cheeks comprise two parts 48.50 connected together by deformable links 52 and assembled by brazing respectively to the first 18 and to the second 20 heat exchange zones. 04/065872
• the cheek 46 comprises two adjacent elongated parts, namely a part 48 and a part 50 connected together by the deformable links 52.
• the part 48 is suitable for being assembled with the first heat exchange zone 18, c that is to say at the spacers of the exchanger 1
• the part 50 is suitable for being assembled with the second heat exchange zone 20, that is to say at the spacers of the exchanger 2.
• One of the parts 50 of the cheek assembled with one of the heat exchange zones 20 comprises at least one protuberance 68 secured by brazing to the other heat exchange zone 18.
• the invention also relates to a method of manufacturing a heat exchange module comprising at least two heat exchangers 1,2, each exchanger comprising fluid circulation tubes 5, 10 generally flat and regularly spaced, having a width , and cooling elements 64, 66 associated with these tubes 5, 10.
• a weakening 22 of the sheet metal strips 30 is carried out in order to limit a first heat exchange zone 18 intended to be associated with.
• the heat exchangers 1, 2 are assembled by brazing.
• said sheet metal strip constitutes, for example, a fin as defined above.
• the sheet metal strips 30 are conformed so as to give them a corrugated shape, the association of the sheet metal strips 30 with the tubes of the heat exchangers being effected by introduction of the sheet metal strips between the tubes 5, 10.
• FIG 5 there is shown schematically the operation of association of the fins to the tubes. As illustrated, the operation of breaking the residual connections 34 of said fins can be carried out during this step.
• the heat exchange zone 18 and the heat exchange zone 20- are still interconnected by the sheet metal tabs 34.
• the residual connections 34 can be broken by displacement of the exchangers 1,2 relative to one another. More specifically, the separation of the heat exchange zones 18 and 20 can be achieved by a shearing movement by exerting on the first exchanger a force in a first direction FI and on the second exchanger a force in a second direction F2, parallel and opposed to the FI direction.
• Such an operation may be carried out by a tool comprising a pair of jaws 41 and 42 suitable for enclosing the heat exchange zone 18 (tubes 5 and heat exchange elements 64) of the heat exchanger 1, and another pair 04/065872
• Said residual connection 34 is produced, for example, by producing a discontinuous slot in the sheet metal strips 30 when they are shaped in corrugated form.
• One of the cheeks can then be positioned in abutment against the heat exchange zone 18 of one of the exchangers 1 and the other cheek 40 in abutment against the heat exchange zone 20 of the other exchanger 2 , during the association of tubes 5, 10 and sheet metal strips 30, as more particularly illustrated in FIG. 6.
• it may be a deformable cheek such as that described in FIG. 5.
• the deformable links 52 could have been previously obtained through cuts 54 made in the thickness of the metal sheet.
• the two parts 48 and 50 of the cheek are then assembled in abutment against the fins 30 before rupture of the residual connection zones of the heat exchange zones 18,20.
• the cheek 46 is associated at the same time as the rest of the exchanger (tubes and fins) and absorbs, thanks to its deformable connections 52, the shearing movement produced by the separation of the two zones of heat exchange.
• the invention is not limited to the embodiments described above by way of example and extends to other variants.
• plastic manifolds each associated with a metallic manifold.
• heat comprising two heat exchangers 1 and 2 (for example a cooling radiator and a condenser) intended to be traversed by different fluids.
• the invention finds a particular application in the production of heat exchange modules for motor vehicles.

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

Applications Claiming Priority (3)

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• 2002
  • 2002-12-23 FR FR0216740A patent/FR2849174B1/fr not_active Expired - Fee Related
• 2003
  • 2003-12-16 AU AU2003300631A patent/AU2003300631A1/en not_active Abandoned
  • 2003-12-16 DE DE60329940T patent/DE60329940D1/de not_active Expired - Lifetime
  • 2003-12-16 EP EP03815413A patent/EP1579162B1/de not_active Expired - Lifetime
  • 2003-12-16 WO PCT/FR2003/003750 patent/WO2004065872A1/fr active Application Filing
  • 2003-12-16 AT AT03815413T patent/ATE447692T1/de not_active IP Right Cessation
  • 2003-12-16 US US10/539,991 patent/US7905277B2/en not_active Expired - Fee Related
  • 2003-12-16 JP JP2004567011A patent/JP4459062B2/ja not_active Expired - Fee Related

Non-Patent Citations (1)

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