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
  • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
  • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
  • F28F21/067—Details
• • 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
  • 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
  • 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
  • F28F9/002—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core with fastening means for other structures
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates
  • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
  • F28F9/0221—Header boxes or end plates formed by stacked 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
  • 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

Definitions

• Heat exchange module in particular for motor vehicles
• the invention relates to a heat exchange module consisting of a main exchanger and at least one secondary heat exchanger mounted parallel to the main exchanger so as to constitute a single assembly whose exchangers are traversed by the same flow. air.
• the invention relates to a heat exchange module consisting of a main exchanger and at least one secondary heat exchanger, the main heat exchanger and the secondary heat exchanger comprising a body provided with tubes. for circulation of fluids and at least one manifold provided with a manifold perforated with holes for receiving the tubes of the body of the exchanger, the module comprising cooling fins common to the main exchanger and to at least one secondary exchanger, these fins being mounted on the tubes of the main exchanger and projecting from the latter substantially perpendicular to its plane, the parts of the fins projecting from the main exchanger comprising cutouts for receiving the secondary exchanger.
• a heat exchange module of the type described above may consist of a vehicle engine cooling radiator and one or more secondary exchangers, generally a condenser forming part of the air conditioning circuit of the vehicle interior automobile or an oil cooler.
• the tubes of the secondary exchanger (or secondary exchangers) are forced into the cutouts of the common fins. These tend to deviate. This is why it is necessary to maintain them by means of a comb-shaped tool inserted between the tubes of the main exchanger. This operation leaves a clearance of several millimeters between the manifold of the main exchanger and the first fin. This results in several drawbacks. On the one hand, part of the tubes is devoid of fins, which reduces the heat exchange capacity and therefore the efficiency of the exchanger. On the other hand, the clearance left between the face outside of the manifold and the first fin can cause corrosion of the tubes.
• the tubes must be flared by means of a flaring punch to avoid tearing of the manifolds under the effect of the pressure of the fluid in the cooling circuit and the mechanical stresses to which the boxes collectors are subject.
• the invention specifically relates to a heat exchange module which overcomes these drawbacks.
• the manifold or boxes of the main exchanger comprise at least one projection extending in the direction of said secondary exchanger (s) in order to cooperate with the manifold (s) of the or said secondary exchangers and / or with said fins so as to structure said module.
• said projection consists of a comb comprising cutouts for receiving the tubes of the secondary exchanger (or secondary exchangers, if necessary) this comb being able to keep the parts of the fins projecting from the body of the body tight. main exchanger.
• the comb can advantageously be provided over the entire length of the manifold of the main exchanger. However, this characteristic is not imperative. The comb could only be provided over part of the length of the main exchanger manifold.
• the comb is preferably made in one piece with the manifold of the main exchanger, in particular by molding a plastic material.
• the comb could, as a variant, be produced separately from the manifold and be made integral with the latter by any appropriate means.
• each manifold of the main heat exchanger may have only one manifold, for example if it is equipped with U-shaped tubes.
• the tubes are straight and each exchanger has a manifold at each end of the tubes.
• each manifold of the main heat exchanger includes a fin retaining comb.
• the comb is supported on the manifolds of the secondary exchanger (or secondary exchangers, if there are several).
• the manifolds of the secondary exchangers constitute stops which stop the movement of the comb and consequently retain the manifold of the main exchanger.
• the comb thus makes it possible to ensure the retention of the manifold of the main exchanger via the boxes of the secondary exchanger (or secondary exchangers, if applicable).
• a seal is placed outside the manifold of the manifold.
• the seal is supported on the first fin of the main exchanger, so that it effectively protects the tubes of the latter against the risks of corrosion in this generally critical area on mechanically assembled exchangers, using a seal in elastomer.
• a conventional type exchanger it would not be possible to mount the seal on the outside of the manifold because the tubular part of the seal which seals the tube would risk being cut by the collar formed in the manifold.
• the seal mounted on the outside of the manifold does not have this drawback.
• the manifold has a shoulder which provides space for the seal.
• the collector is made of plastic.
• the manifold has a tubular shape of closed section made in one piece.
• the manifold is closed at its two ends by plugs. These plugs can be, in particular, welded by friction or by any other suitable technique.
• the manifold comprises a lateral opening closed by a cover.
• the cover can be welded to the manifold by any suitable technique, in particular by friction.
• This design allows the demoulding of pipes flattened at the base with a connection radius favorable to the flow of the exchanger fluid and, in addition, a reduced header box height.
• the manifold preferably comprises forms capable of receiving and fixing the nozzle of a motor-ventilator group.
• FIG. 1 is a three-dimensional view of a heat exchange module of the prior art consisting of a cooling radiator and a secondary exchanger, namely an air conditioning condenser;
• FIG. 1 shows the common fins of the heat exchange module of Figure 1;
• FIG. 3 is an exploded perspective view of a first embodiment of the manifold of the main exchanger of a heat exchange module according to the invention
• - Figure 4 is a bottom view of the manifold shown in Figure 3;
• - Figure 5 shows on an enlarged scale a pair of teeth of the comb of the heat exchange module shown in Figures 3 and 4;
• FIG. 6 is a partial sectional view on an enlarged scale of the manifold of the main exchanger and the secondary exchanger of the heat exchange module shown in Figures 3 and 4;
• FIGS. 7 to 9 are three partial perspective views which illustrate different stages of assembly of a second embodiment of a heat exchange module according to the present invention.
• FIG. 10 is a sectional view of the heat exchange module of Figure 9, passing through the axis of the tube.
• the heat exchange module of the prior art is composed of a radiator 1 for cooling a motor vehicle engine and a condenser 2 for air conditioning, these two exchangers being generally planar .
• the radiator 1 and the condenser 2 respectively constitute a main exchanger and a secondary exchanger.
• the radiator 1 consists in a known manner of a body 3 produced from a bundle of vertical fluid circulation tubes and mounted between two manifolds 4 and 5.
• the manifolds are arranged along two parallel sides of the body and provided with inlet pipe 6 and outlet (not shown) of the cooling fluid.
• the condenser 2 also consists of a body 7 produced from a bundle of vertical tubes 23 for circulation of fluid mounted between two manifolds 8 and 9.
• the manifolds 8 and 9 are arranged along two parallel sides of the body 7. They are provided with two inlet and outlet pipes 10 for the refrigerant.
• the heat exchange module comprises fins 11 common to the cooling radiator 1 and to the condenser 2. These fins 11 are shown in more detail in FIG. 2. They are mounted so conventional on the tubes 22 of the body 3 of the heat exchanger 1. They have protruding extensions 12, perpendicular to the plane of the exchangers, on the side of the secondary heat exchanger 2.
• the extensions 12 include cutouts 13 open at direction of the exchanger 2. These cutouts have a shape corresponding to the cross section of the tubes 23 of the condenser 2, which are here flat tubes, and even not as these tubes, so as to receive them.
• the tubes 23 of the secondary exchanger 2 are forcibly assembled in the cutouts 13 of the fins. This ensures friction locking between the walls of the tubes 23 and the edges of the cutouts 13.
• the assembly of the exchanger 1 provided with its fins 11 with the exchanger 2 devoid of fins is carried out as follows.
• the exchanger 2 is simply pressed against the exchanger 1 by forcibly engaging the tubes 23 of the exchanger 2 in the cutouts 13 of the extensions 12 of the fins, which ensures the blocking of the exchanger.
• the manifold 5 of the main radiator 1 consists of a manifold or manifold plate (not visible in FIG. 1) made of metal and comprising holes for receiving the tubes 22 of the exchanger 1.
• the manifold 5 comprises on the other hand a cover 14, generally made of plastic.
• the assembly of the cover 14 on the collector is generally done by means of crimping lugs folded over a peripheral rim of the cover 9.
• the peripheral rim which surrounds the manifold 9 and which is intended to receive the lugs which allow the crimping of the cover 9 on the collector increases the size of the cooling radiator 1 and consequently the overall size of the module by imposing the presence of a space between the main exchanger and the secondary exchanger.
• a rubber or elastomer seal is placed inside the manifold 5.
• This seal has tubular parts which engage in the holes for receiving the tubes 22 of the main exchanger 1.
• the fins 11 must be maintained during the introduction of the tubes 23 of the condenser 2 by an appropriate tool inserted between the last fin of the bundle and the external face of the manifold. This operation leaves a clearance of several millimeters between the manifold and the first fin. This results in a decrease in the exchange surface between the air flow which passes through the exchanger and the fins.
• the tubes 22 of the main exchanger remain bare because the tubular part of the joint cannot extend over the entire length for reasons of demolding.
• FIGS. 3, 4 and 6 various views which show a first embodiment of the manifold of the main exchanger 1 of a heat exchange module according to the invention.
• FIGS. 3, 4 and 6 the parts identical to those of the heat exchange module shown in FIG. 1 have been designated by identical references.
• the manifold 5 of the main exchanger 1 comprises a comb 28 which, in the embodiment shown, extends over the entire length of the manifold 5.
• the comb 28 could only extend over a only part of the length of the manifold.
• the comb 28 is made in one piece with the manifold 5, advantageously by molding a plastic material.
• the comb could be produced separately and made integral with the manifold.
• the comb 28 consists of teeth 29 arranged in pairs and which delimit between them a cutout 30 (see FIG. 5) whose function is to maintain the first fins during the assembly of the tubes 23.
• the cutouts 30 are intended to receive the tubes 23 of the secondary exchanger 2 when the main exchanger and the secondary exchanger are assembled (see Figure 6).
• the comb 28 has a face 31 directed towards the fins 11 and on which the latter come to bear.
• the comb 28 fulfills the function which, in the prior art, is held by a special auxiliary tool temporarily introduced during assembly of the tubes 23 of the condenser 2 between the fins 11 and the manifold 5, and more particularly between the fins 11 and the external face of the manifold. Since the use of this tool is no longer necessary, it is no longer useful to leave a clearance of several millimeters between the first fin and the manifold so that the tubes 22 can have fins over their entire length .
• the seal 33 can be arranged outside of the manifold 5, on the face of the manifold 35 facing the fin bundle 11. This arrangement is advantageous because the seal 33 protects the part of the tube located between the first fin and the external face of the manifold 35 against corrosion.
• a shoulder 37 constitutes a stop for the set of fins 11 so as to avoid compression of the seal 33.
• the comb 28 has a face 39 directed towards the manifold 8 of the exchanger 2 which bears on this manifold 8.
• the teeth 29 of the comb 28 thus take up the stripping forces from the manifold 5 under the effect of the pressure of the coolant which circulates in the tubes 22.
• the tubes of the main exchanger 1, such as 22, have a part flared mechanically by the introduction of a flaring punch.
• the purpose of this flaring is to prevent tearing of the manifolds.
• these efforts are taken up by the manifolds 8 and 9 of the secondary exchanger 2, the flaring of the tubes 22 is no longer justified. Consequently, these tubes can be straight and have a constant section over their entire length. They may, however, include a constriction or chamfer 41 at their end in order to favor their introduction into the joint 33 (FIG. 6).
• the fact that the tubes are not flared allows greater freedom in the choice of the alloy in which these tubes are made. It is thus possible to use new alloys and harder metallurgical states which confer better resistance of the tube to corrosion.
• the manifold is constituted by a tubular shape of closed section. It is made in one piece.
• the collector and the cover which, according to the prior art, are produced in two parts of different materials (steel collector and plastic cover), are, in this embodiment, produced in a single molded part made of plastic.
• the manifold is closed at its two ends by plugs 43 ( Figures 3 and 4). These plugs can be friction welded to the manifold.
• the manifold is made of plastic, it can easily include fixing lugs such as 45 which allow it to be fixed to the chassis of the vehicle. It may also include forms 47 able to receive and fix the nozzle of a motor-fan unit (not shown).
• FIG. 7 to 10 a second embodiment of the manifold of a module according to the invention.
• the manifold 5 also made of molded plastic, consists of a box 51 comprising the inlet and outlet pipes 6 of the fluid.
• the box 51 also includes the holes intended for the reception of the tubes 22 of the main exchanger 1.
• the comb 28 is also formed on the box 31.
• the latter is closed laterally by a cover 53, which may optionally be flat.
• the cover 53 is fixed to the box 51 by any suitable means, in particular by friction welding.
• the comb 28 could also be provided on the cover 53. This design allows the demoulding of tubes flattened at the base with a connection radius favorable to the flow of the liquid and in addition a reduced manifold height.

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• 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)

Applications Claiming Priority (3)

Publications (2)

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ID=31897342

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• 2002
  • 2002-09-12 FR FR0211325A patent/FR2844586B1/fr not_active Expired - Fee Related
• 2003
  • 2003-09-12 WO PCT/FR2003/002710 patent/WO2004025204A2/fr not_active Ceased
  • 2003-09-12 AU AU2003276339A patent/AU2003276339A1/en not_active Abandoned
  • 2003-09-12 EP EP03795048.2A patent/EP1558885B1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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