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EP3368850A1 - Heat exchanger comprising an exchange bundle, housing designed to encase same and method for assembling such a heat exchanger - Google Patents

Heat exchanger comprising an exchange bundle, housing designed to encase same and method for assembling such a heat exchanger

Info

Publication number
EP3368850A1
EP3368850A1 EP16804828.8A EP16804828A EP3368850A1 EP 3368850 A1 EP3368850 A1 EP 3368850A1 EP 16804828 A EP16804828 A EP 16804828A EP 3368850 A1 EP3368850 A1 EP 3368850A1
Authority
EP
European Patent Office
Prior art keywords
housing
heat exchanger
free edge
fluid
exchange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16804828.8A
Other languages
German (de)
French (fr)
Inventor
Anne-Sylvie Magnier-Cathenod
Carlos Martins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Publication of EP3368850A1 publication Critical patent/EP3368850A1/en
Withdrawn legal-status Critical Current

Links

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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1653—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having a square or rectangular shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • 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
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/007—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
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0073—Gas coolers
    • 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

Definitions

  • the present invention relates to the field of heat exchangers, adapted to allow the exchange of heat between a first and a second fluid, in particular heat exchangers comprising an exchange beam and a housing adapted to envelop it.
  • the invention relates to a method for assembling such a heat exchanger.
  • an air-conditioning system for example an air-conditioning system intended for a motor vehicle, a refrigerant or refrigerant - used for cooling the passenger compartment of said motor vehicle - circulates inside a condenser when a cooling cycle.
  • a determined amount of heat is withdrawn from said refrigerant when it is in a gaseous state.
  • Such a heat exchanger generally comprises two separate circuits, one for the refrigerant, the other for the fluid to cool the refrigerant.
  • the heat exchanger of the prior art comprises an exchange beam comprising a stack of tubes.
  • the refrigerant can circulate inside the tubes, from a first end to a second end of these tubes.
  • the fluid used to cool the refrigerant circulates, meanwhile, outside these tubes, more precisely between two adjacent tubes, against the current of the refrigerant, namely from the second end to the first end of the tubes.
  • this exchange beam comprises collecting boxes fixed at the ends of said stack; these collector boxes being respectively connected to the inlet and the outlet for the refrigerant.
  • the tubes comprise a wall of a thickness determined to withstand the high pressure to which the refrigerant circulating inside said tubes is subjected.
  • the heat exchange between the refrigerant and the fluid is carried out through this wall.
  • the heat exchangers disclosed in the prior art generally comprise an exchange bundle wrapped in a housing. It is known to assemble the assembly composed of the exchange beam and the housing by soldering (namely by using a brazing process). In the prior art, it is known to make housings in a plastic material.
  • patent application FR-A-2965336 discloses an assembly consisting of a two-phase heat exchanger and a bottle, in which at least a portion of the casing enveloping the exchange beam comprises the plastic material. As described in this patent application, the part comprising plastic is fixed in a metal part comprising a groove for crimping the plastic housing.
  • the heat exchangers of the prior art comprising a wrapping beam wrapped in a housing made at least partly of plastic material, even if they operate relatively satisfactorily, require improvements, in particular to to increase the efficiency of said heat exchanger.
  • the shape of the housing comprising at least one plastic part is dictated by the shape of all or part of the connection elements of the exchange beam, for connecting together the housing and the exchange beam.
  • the connection elements of the exchange beam for connecting together the housing and the exchange beam.
  • An object of the present invention is therefore to increase the efficiency of heat exchangers of the prior art, comprising an exchange bundle wrapped with a housing made at least partly of plastic.
  • Another object of the present invention is to develop a heat exchanger in which the connection between the part of the plastic housing and all or part of the connection elements of the exchange beam avoids shape constraints for the housing of a heat exchanger.
  • the subject of the invention is a heat exchanger for exchanging heat between a first fluid and a second fluid
  • said heat exchanger comprising an exchange beam and a housing adapted to envelop said exchange beam
  • the heat exchanger is provided with an inlet and an outlet for the first fluid and an inlet and an outlet for the second fluid
  • the housing consists of a substantially flat first portion or preferably, flat (for example in the form of a plate), adapted to form a wall of said housing, and a second receptacle-shaped part, said second part comprising a free edge adapted to be connected with said first part, and thus forming said housing.
  • said free edge is adapted to be fixed on said first part, and thus form said housing.
  • the housing of said heat exchanger comprises two parts.
  • the first part is used as a support element ensuring the counter-reaction necessary for crimping by the contacts of the free edge of the second part of the housing having the shape of a receptacle.
  • the free edge of the second part exerts a pressure on the surface of the first part of said housing.
  • the first part of the housing is an integral part of the exchange beam. According to one embodiment of the invention, the first part of the housing and the exchange bundle are assembled by brazing.
  • the first part of the housing comprises a metallic material and the second part of the housing comprises a plastic material.
  • the first part is provided with fixing means for fixing the free edge of the second part of the housing on the first part of the housing.
  • the aforementioned fixing means comprise crimping teeth, adapted to fix the free edge of the second part of the housing on the first part of the housing.
  • the free edge has a collar and the crimping teeth are adapted to fix said flange on the first part of the housing.
  • a flange extends from a folded edge or an object shaped ring or ring, allowing its assembly with another part, in this case with the first part of the housing.
  • the free edge of the first part comprises a groove adapted to receive a sealing element such as a seal.
  • the inlet and the outlet intended for the first fluid are arranged on the first part of the housing and the inlet and the outlet intended for the second fluid are arranged on the second part of the housing.
  • the exchange beam comprises a stack of tubes and collector boxes at the ends of said stack, respectively connected to the inlet and the outlet for the first fluid.
  • Another object of the invention relates to a method for assembling a heat exchanger comprising the following steps: a) assembling by brazing the formed assembly of the exchange beam and the first part of the housing, and
  • the free edge connection step b) comprises:
  • the step b) of connecting the free edge (25) comprises:
  • step b) of connecting the free edge comprises: - receiving inside a groove in the free edge of the second part of the housing a sealing element and fixing said free edge on the first part of said housing.
  • FIG. 1 represents a perspective view of a heat exchanger according to the present invention
  • FIG. 2 is an exploded view of the heat exchanger shown in FIG. 1;
  • FIG. 3 represents a view, from below, of three-quarters, of the second part of the heat exchanger housing according to the invention.
  • FIG. 4 is a sectional view of a heat exchanger according to the present invention on which are shown in particular a manifold and one end of the exchange beam of the heat exchanger according to the present invention.
  • FIG. 1 represents a perspective view of a heat exchanger 1 according to the invention. The different elements of the heat exchanger 1 are visible in FIG.
  • the heat exchanger 1 comprises a housing consisting of a first plate-shaped portion 1 1, adapted to form one of the walls of the housing 1 1, 20, and a second portion 20 in the form of a receptacle.
  • This second portion 20 in the form of a receptacle comprises a free edge 25, adapted to be fixed on the flat surface of the first part 1 1, and thus form a housing January 1, 20.
  • This housing 1 1, 20 is, in a way, the wall or the outer casing of the heat exchanger 1 according to the present invention.
  • the heat exchanger 1 is adapted to receive within it an exchange bundle 15.
  • the exchange bundle 15 consists of a stack of tubes 12 and collecting boxes 13, 14 fixed at the ends of said stack 12.
  • the header box 13 is connected to the inlet 16 for a first fluid such as a refrigerant adapted to allow heat exchange inside the heat exchanger 1.
  • the manifold 14, meanwhile, is connected to the outlet 17, also for said first fluid.
  • the arrangement constituted by the stack of tubes 12 and collector boxes 13, 14 is known from the prior art and is therefore not described here in detail.
  • the manifolds 13, 14 are obtained by assembling four separate pieces. These parts comprise an extruded comb-shaped box, a thin collector of plated material and two end caps, one of which is pierced to ensure the flow of the first fluid to the flange.
  • the elements forming the exchange beam 15 comprise a metallic material. This metal material is selected to allow the fixing of the stack of tubes 12 and manifolds 13, 14, fixed to the ends of said stack 12, by a brazing process.
  • the wall formed by the first part 1 1 comprises a metallic material.
  • the assembly constituted by the exchange beam 15, the first part 1 1 adapted to form a wall of the housing 1 1, 20, the inlet 16 and the outlet 17 can easily be assembled during a brazing process , a method well known to those skilled in the art.
  • the second part 20 of the housing 1 1, 20 has essentially the shape of a receptacle comprising five walls and a free edge 25. This free edge 25 is adapted to be connected with the wall 1 1, for example to be fixed on this wall 1 1.
  • the second portion 20 of the housing 1 1, 20, is provided with an inlet 21 for a second fluid such as water.
  • the second part 20 of the housing 1 1, 20, is also provided with an outlet 22 intended to said second fluid.
  • the respective positioning of the inlet 16 and the outlet 17, intended for the first fluid, and the inlet 21 and the outlet 22, intended for the second fluid, allows a heat exchange between the first fluid and the second fluid, the latter flowing against the current of the first fluid.
  • the free edge 25 is correctly connected to (or fixed on) the first part 1 1.
  • the free edge 25 is adapted to be fixed on the first part 1 1 by means of crimping teeth 18.
  • the result of the fixing obtained by the cooperation of the free edge 25 and the crimping teeth 18 is visible in Figure 4.
  • the free edge 25 may be fixed on the first part 1 1 with any suitable fastening material such as glue. It is also possible to improve the fixing of the free edge 25 to the first part 1 1 by combining a suitable fastening material, for example glue, and crimping teeth 18.
  • a sealing element 30 is positioned between the free edge 25 and the wall 1 1 (visible in FIG. 2), thus improving the tightness between said free edge 25 and said wall 1 1 (visible in Figure 2).
  • FIG. 2 illustrates a particularly advantageous characteristic of the heat exchanger 1 according to the invention, namely that it makes it possible to overcome form constraints on the housing 1 1, 20.
  • the second portion 20 of the housing 1 1, 20, can be determined so as to follow the shape imposed by the exchange beam 15.
  • the inner walls of the second portion 20 of the housing 1 1, 20, are adapted to be in the immediate vicinity or preferably in contact with the outside of the exchange beam 15.
  • the contact between the inner walls and the stack of the tubes 12 is made locally on ribs 24 with very small clearance relative to the walls of the second portion 20 of the housing 1 1, 20. This allows limit er the path of the second fluid between the inner walls of the second portion 20 of the housing 1 1, 20 and the outside of the beam exchange 15, forcing the circulation of the second fluid inside said exchange beam 15.
  • the inlet 21 and the outlet 22, both intended for the second fluid are positioned at the recesses where the collecting boxes 13, 14 are housed.
  • the performance of the heat exchanger 1 ie the exchanges of heat between the first and the second fluid, are optimized thanks to the fact that a large part of the exchange surface - or the entire exchange surface - is immersed in the second fluid.
  • the ribs 23 present outside the walls of the second portion 20 of the housing 1 1, 20, in turn, increase the rigidity of said second portion 20.
  • the free edge 25 of the second portion 20 of the housing 1, 20 is clearly visible in Figure 3.
  • This free edge 25 is provided with a flange 26, particularly adapted to allow the connection of the free edge 25 to the first part 1 1 of the housing 1 1, 20.
  • the flange 26 can thus cooperate with the crimping teeth 18 of the first part 1 1 to ensure a tight connection of the free edge 25 to the first part 1 1 of the housing 1 1, 20.
  • FIG. 3 represents a sectional view of the part of the heat exchanger 1 comprising in particular the manifold. This FIG. 4 shows the inlet 21 intended for the second fluid such as water and allowing said second fluid to flow between the adjacent tubes.
  • FIG. 4 is also visible the output 17 for the first fluid (refrigerant), which output 17 is connected to the tubes via the manifold box 14, and allowing the first and second fluids to flow inside separate circuits.
  • the crimping teeth 18 are fixed on the flange 26.
  • FIG. 4 it is shown that the free edge 25 is provided with A groove 27. This groove 27 is adapted to receive at least a portion of a sealing member 30. During attachment of the free edge 25 to the first portion 1 1, the presence of such a sealing member 30 can improve the sealing of the connection between the first portion 1 1 and the second portion 20 of the housing 1 1, 20.
  • the heat exchanger 1 according to the invention is obtained by means of a method for assembling the heat exchanger 1 in which, in a first step, the assembly constituted by the exchange beam 15, the first Part 1 1, the inlet 16 and the outlet 17 is assembled by brazing, the various elements being all of metal material.
  • the heat exchanger 1 is obtained by connecting the free edge 25 of the second part 20 of the housing 1 1, 20 on the first part 1 1 of the housing 1 1, 20.
  • the second part 20 of the housing 11, 20 is preferably obtained by means of a molding process, such as an injection molding process.
  • the positioning of the inlet 21 and the outlet 22 of the second part 20 of the housing 1 1, 20, can be easily optimized in particular to take into account the location of the heat exchanger 1 within a motor vehicle, as well as the desired end uses of this heat exchanger 1.
  • the positioning of the inlet 21 and the outlet 22 within the second portion 20 of the housing 1 1, 20 can be optimized to improve the contact with an inlet and an outlet for the second fluid.
  • the flat shape of the first part 1 1 of the housing 1 1, 20 makes it possible to obtain an interior volume of the housing 1 1, 20 greater than that offered by the housings of the prior art, this larger interior volume being available for the exchange beam 15, while maintaining an external volume and, therefore, a size identical to those of the housings of the prior art.
  • the invention makes it possible to increase the heat exchange surface area with respect to the devices of the prior art by adding, for example, additional tubes in the stack of tubes. 12 forming the exchange beam 15 and, therefore, to increase the capacity of the heat exchanger to dissipate heat.

Landscapes

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

Abstract

The present invention relates to a heat exchanger (1) for the exchange of heat between a first fluid and a second fluid, the said heat exchanger (1) comprising an exchange bundle (15) and a housing (11, 20) designed to encase the said exchange bundle (15), in which the heat exchanger (1) is provided with an inlet (16) and with an outlet (17) which are intended for the first fluid, and with an inlet (21) and with an outlet (22) which are intended for the second fluid, characterized in that the housing (11, 20) is made up of an essentially planar or, for preference, planar, first part (11) in the form of a plate designed to form one wall of the said housing, and of a receptacle-shaped second part (20), the said second part (20) having a free edge (25) designed to be connected to the said first part (11) and thus form the said housing (11, 20).

Description

ECHANGEUR DE CHALEUR COMPRENANT UN FAISCEAU D'ECHANGE, BOITIER ADAPTE POUR ENVELOPPER CELUI-CI ET UN PROCEDE POUR ASSEMBLER UN TEL ECHANGEUR DE CHALEUR Domaine de l'invention  HEAT EXCHANGER COMPRISING AN EXCHANGE BEAM, HOUSING ADAPTED TO ENVELOP THE SAME, AND A METHOD FOR ASSEMBLING SUCH A HEAT EXCHANGER Field of the Invention
La présente invention concerne le domaine des échangeurs de chaleur, adaptés pour permettre l'échange de chaleur entre un premier et un deuxième fluide, en particulier des échangeurs de chaleur comprenant un faisceau d'échange et un boîtier adapté pour envelopper celui-ci. De plus, l'invention concerne un procédé pour assembler un tel échangeur de chaleur. The present invention relates to the field of heat exchangers, adapted to allow the exchange of heat between a first and a second fluid, in particular heat exchangers comprising an exchange beam and a housing adapted to envelop it. In addition, the invention relates to a method for assembling such a heat exchanger.
Etat de la technique Dans un système de climatisation, par exemple un système de climatisation destiné à un véhicule automobile, un fluide frigorigène ou réfrigérant - utilisé pour refroidir l'habitacle dudit véhicule automobile - circule à l'intérieur d'un condenseur lors d'un cycle de refroidissement. Afin de permettre la condensation (et donc le refroidissement) du réfrigérant, une quantité déterminée de chaleur est soustraite dudit réfrigérant lorsque celui-ci est dans un état gazeux. State of the art In an air-conditioning system, for example an air-conditioning system intended for a motor vehicle, a refrigerant or refrigerant - used for cooling the passenger compartment of said motor vehicle - circulates inside a condenser when a cooling cycle. In order to allow condensation (and thus cooling) of the refrigerant, a determined amount of heat is withdrawn from said refrigerant when it is in a gaseous state.
Dans l'art antérieur, il est connu d'obtenir le refroidissement d'un réfrigérant à l'aide d'un échangeur de chaleur, ledit échangeur de chaleur étant adapté pour permettre un échange de chaleur entre le réfrigérant et un fluide, tel que de l'eau, pour refroidir ledit réfrigérant. In the prior art, it is known to obtain the cooling of a refrigerant using a heat exchanger, said heat exchanger being adapted to allow a heat exchange between the refrigerant and a fluid, such as water to cool said refrigerant.
Un tel échangeur de chaleur comprend généralement deux circuits distincts, l'un destiné au réfrigérant, l'autre destiné au fluide pour refroidir le réfrigérant. Plus précisément, l'échangeur de chaleur de l'art antérieur comprend un faisceau d'échange comprenant un empilement de tubes. Le réfrigérant peut circuler à l'intérieur des tubes, d'une première extrémité vers une deuxième extrémité de ces tubes. Le fluide utilisé pour refroidir le réfrigérant circule, quant à lui, à l'extérieur de ces tubes, plus précisément entre deux tubes adjacents, à contre-courant du réfrigérant, à savoir de la deuxième extrémité vers la première extrémité des tubes. En complément d'un empilement de tubes, ce faisceau d'échange comprend des boites collectrices fixées aux extrémités dudit empilement ; ces boites collectrices étant respectivement connectées à l'entrée et à la sortie pour le réfrigérant. Toujours selon l'art antérieur, les tubes comprennent une paroi d'une épaisseur déterminée pour supporter la haute pression à laquelle est soumis le réfrigérant circulant à l'intérieur desdits tubes. L'échange de chaleur entre le réfrigérant et le fluide est réalisé au travers de cette paroi. Les échangeurs de chaleur divulgués dans l'art antérieur comprennent généralement un faisceau d'échange enveloppé d'un boîtier. Il est connu d'assembler l'ensemble composé du faisceau d'échange et du boîtier par brasage (à savoir en ayant recours à un procédé de brasage). Dans l'art antérieur, il est connu de réaliser des boîtiers dans un matériau plastique. A titre d'exemple, la demande de brevet FR-A-2965336 divulgue un ensemble composé d'un échangeur de chaleur bi-phasique et d'une bouteille, dans lequel au moins une partie du boîtier enveloppant le faisceau d'échange comprend de la matière plastique. Tel que décrit dans cette demande de brevet, la partie comprenant de la matière plastique est fixée dans une partie métallique comprenant une gorge permettant de sertir le boîtier en matière plastique. Such a heat exchanger generally comprises two separate circuits, one for the refrigerant, the other for the fluid to cool the refrigerant. More specifically, the heat exchanger of the prior art comprises an exchange beam comprising a stack of tubes. The refrigerant can circulate inside the tubes, from a first end to a second end of these tubes. The fluid used to cool the refrigerant circulates, meanwhile, outside these tubes, more precisely between two adjacent tubes, against the current of the refrigerant, namely from the second end to the first end of the tubes. In addition to a stack of tubes, this exchange beam comprises collecting boxes fixed at the ends of said stack; these collector boxes being respectively connected to the inlet and the outlet for the refrigerant. Still according to the prior art, the tubes comprise a wall of a thickness determined to withstand the high pressure to which the refrigerant circulating inside said tubes is subjected. The heat exchange between the refrigerant and the fluid is carried out through this wall. The heat exchangers disclosed in the prior art generally comprise an exchange bundle wrapped in a housing. It is known to assemble the assembly composed of the exchange beam and the housing by soldering (namely by using a brazing process). In the prior art, it is known to make housings in a plastic material. By way of example, patent application FR-A-2965336 discloses an assembly consisting of a two-phase heat exchanger and a bottle, in which at least a portion of the casing enveloping the exchange beam comprises the plastic material. As described in this patent application, the part comprising plastic is fixed in a metal part comprising a groove for crimping the plastic housing.
Toutefois, les échangeurs de chaleur de l'art antérieur, comprenant un faisceau d'échange enveloppé d'un boitier constitué au moins en partie en matière plastique;, même s'ils fonctionnent de manière relativement satisfaisante, requièrent des améliorations, notamment afin d'accroître l'efficacité dudit échangeur de chaleur. However, the heat exchangers of the prior art, comprising a wrapping beam wrapped in a housing made at least partly of plastic material, even if they operate relatively satisfactorily, require improvements, in particular to to increase the efficiency of said heat exchanger.
En outre, dans ces échangeurs de chaleur de l'art antérieur, la forme du boîtier comprenant au moins une partie plastique est dictée par la forme de tout ou partie des éléments de connexion du faisceau d'échange, permettant de connecter ensemble le boîtier et le faisceau d'échange. Ainsi, à un type donné de faisceau d'échange correspond un type particulier de boîtier. Cela a pour conséquence la multiplication des chaînes de production, afin de produire les différents types de boîtiers correspondant aux différents types de faisceaux d'échange. Objet de l'invention In addition, in these heat exchangers of the prior art, the shape of the housing comprising at least one plastic part is dictated by the shape of all or part of the connection elements of the exchange beam, for connecting together the housing and the exchange beam. Thus, to a given type of exchange beam corresponds a particular type of housing. This results in the multiplication of production lines, in order to produce the different types of boxes corresponding to the different types of exchange beams. Object of the invention
Un objectif de la présente invention vise donc à accroître l'efficacité des échangeurs de chaleur de l'art antérieur, comprenant un faisceau d'échange enveloppé d'un boîtier constitué au moins en partie en matière plastique. An object of the present invention is therefore to increase the efficiency of heat exchangers of the prior art, comprising an exchange bundle wrapped with a housing made at least partly of plastic.
Un autre objectif de la présente invention vise à mettre au point un échangeur de chaleur dans lequel la connexion entre la partie du boîtier en matière plastique et tout ou partie des éléments de connexion du faisceau d'échange permet d'éviter des contraintes de formes pour le boîtier d'un échangeur de chaleur. Another object of the present invention is to develop a heat exchanger in which the connection between the part of the plastic housing and all or part of the connection elements of the exchange beam avoids shape constraints for the housing of a heat exchanger.
D'autres objectifs, apparaîtront, le cas échéant, à la lecture de la présente description. Contre toute attente, la Demanderesse a découvert que ces objectifs étaient atteints par un échangeur de chaleur selon l'invention. Other objectives will appear, if necessary, on reading the present description. Against all expectations, the Applicant has discovered that these objectives were achieved by a heat exchanger according to the invention.
Ainsi, l'invention a pour objet un échangeur de chaleur pour échanger de la chaleur entre un premier fluide et un deuxième fluide, ledit échangeur de chaleur comprenant un faisceau d'échange et un boîtier adapté pour envelopper ledit faisceau d'échange, dans lequel l'échangeur de chaleur est pourvu d'une entrée et d'une sortie destinées au premier fluide et d'une entrée et d'une sortie destinées au deuxième fluide, dans lequel le boîtier est constitué d'une première partie essentiellement plane ou, de préférence, plane (par exemple en en forme de plaque), adaptée pour former une paroi dudit boîtier, et d'une deuxième partie en forme de réceptacle, ladite deuxième partie comprenant un bord libre adapté pour être connecté avec ladite première partie, et ainsi former ledit boîtier. Selon un mode de réalisation préféré de l'invention, ledit bord libre est adapté pour être fixé sur ladite première partie, et ainsi former ledit boîtier. Thus, the subject of the invention is a heat exchanger for exchanging heat between a first fluid and a second fluid, said heat exchanger comprising an exchange beam and a housing adapted to envelop said exchange beam, in which the heat exchanger is provided with an inlet and an outlet for the first fluid and an inlet and an outlet for the second fluid, wherein the housing consists of a substantially flat first portion or preferably, flat (for example in the form of a plate), adapted to form a wall of said housing, and a second receptacle-shaped part, said second part comprising a free edge adapted to be connected with said first part, and thus forming said housing. According to a preferred embodiment of the invention, said free edge is adapted to be fixed on said first part, and thus form said housing.
Un avantage de l'échangeur de chaleur selon la présente invention réside dans le fait que le boîtier dudit échangeur de chaleur comprend deux parties. La première partie est utilisée comme un élément d'appui assurant la contre réaction nécessaire au sertissage par les contacts du bord libre de la deuxième partie du boîtier ayant la forme d'un réceptacle. Lorsque la première partie et la deuxième partie du boîtier sont ainsi connectées, le bord libre de la deuxième partie exerce une pression sur la surface de la première partie dudit boîtier. Une connexion de cette nature permet de s'affranchir des contraintes de formes sur le boîtier, lequel n'est plus nécessairement limité à un simple rectangle, sa forme pouvant être optimisée pour correspondre à un différent type de faisceau d'échange. An advantage of the heat exchanger according to the present invention is that the housing of said heat exchanger comprises two parts. The first part is used as a support element ensuring the counter-reaction necessary for crimping by the contacts of the free edge of the second part of the housing having the shape of a receptacle. When the first part and the second part of the case are thus connected, the free edge of the second part exerts a pressure on the surface of the first part of said housing. A connection of this nature makes it possible to overcome form constraints on the housing, which is no longer necessarily limited to a simple rectangle, its shape being able to be optimized to correspond to a different type of exchange beam.
Selon un mode de réalisation de l'invention, la première partie du boîtier fait partie intégrante du faisceau d'échange. Selon un mode de réalisation de l'invention, la première partie du boîtier et le faisceau d'échange sont assemblés par brasage. According to one embodiment of the invention, the first part of the housing is an integral part of the exchange beam. According to one embodiment of the invention, the first part of the housing and the exchange bundle are assembled by brazing.
Selon un mode de réalisation de l'invention, la première partie du boîtier comprend un matériau métallique et la deuxième partie du boîtier comprend un matériau plastique. According to one embodiment of the invention, the first part of the housing comprises a metallic material and the second part of the housing comprises a plastic material.
Selon un mode de réalisation de l'invention, la première partie est pourvue de moyens de fixation pour fixer le bord libre de la deuxième partie du boîtier sur la première partie du boîtier. According to one embodiment of the invention, the first part is provided with fixing means for fixing the free edge of the second part of the housing on the first part of the housing.
Selon un mode de réalisation de l'invention, de préférence, les susdits moyens de fixation comprennent des dents de sertissage, adaptées pour fixer le bord libre de la deuxième partie du boîtier sur la première partie du boîtier. Selon un mode de réalisation préféré de l'invention de l'invention, le bord libre présente une collerette et les dents de sertissage sont adaptées pour fixer ladite collerette sur la première partie du boîtier. According to one embodiment of the invention, preferably, the aforementioned fixing means comprise crimping teeth, adapted to fix the free edge of the second part of the housing on the first part of the housing. According to a preferred embodiment of the invention of the invention, the free edge has a collar and the crimping teeth are adapted to fix said flange on the first part of the housing.
Une collerette s'étend d'un bord rabattu ou d'un objet en forme de couronne ou d'anneau, permettant son assemblage avec une autre pièce, en l'espèce avec la première partie du boîtier. A flange extends from a folded edge or an object shaped ring or ring, allowing its assembly with another part, in this case with the first part of the housing.
Selon un mode de réalisation de l'invention, le bord libre de la première partie comprend une rainure adaptée pour recevoir un élément d'étanchéité tel qu'un joint. Selon un mode de réalisation de l'invention, l'entrée et la sortie destinées au premier fluide sont disposées sur la première partie du boîtier et l'entrée et la sortie destinées au deuxième fluide sont disposées sur la deuxième partie du boîtier. Selon un mode de réalisation de l'invention, le faisceau d'échange comprend un empilement de tubes et des boites collectrices aux extrémités dudit empilement, respectivement connectées à l'entrée et la sortie destinées au premier fluide. According to one embodiment of the invention, the free edge of the first part comprises a groove adapted to receive a sealing element such as a seal. According to one embodiment of the invention, the inlet and the outlet intended for the first fluid are arranged on the first part of the housing and the inlet and the outlet intended for the second fluid are arranged on the second part of the housing. According to one embodiment of the invention, the exchange beam comprises a stack of tubes and collector boxes at the ends of said stack, respectively connected to the inlet and the outlet for the first fluid.
Un autre objet de l'invention concerne un procédé pour assembler un échangeur de chaleur comprenant les étapes suivantes : a) assembler par brasage l'ensemble formé du faisceau d'échange et de la première partie du boîtier, et Another object of the invention relates to a method for assembling a heat exchanger comprising the following steps: a) assembling by brazing the formed assembly of the exchange beam and the first part of the housing, and
b) connecter le bord libre de la deuxième partie du boîtier et la première partie du boîtier.  b) connect the free edge of the second housing part and the first housing part.
De préférence, l'étape b) de connexion du bord libre comprend : Preferably, the free edge connection step b) comprises:
- fixer le bord libre de la deuxième partie du boîtier sur la première partie du boîtier au moyen de dents de sertissage. - Fix the free edge of the second housing part on the first part of the housing by means of crimping teeth.
Selon un mode de réalisation particulier, l'étape b) de connexion du bord libre (25) comprend : According to a particular embodiment, the step b) of connecting the free edge (25) comprises:
- fixer le bord libre de la deuxième partie du boîtier sur la première partie via un élément d'étanchéité.  - Fix the free edge of the second part of the housing on the first part via a sealing element.
Selon un mode de réalisation de l'invention, l'étape b) de connexion du bord libre comprend : - recevoir à l'intérieur d'une rainure dans le bord libre de la deuxième partie du boîtier un élément d'étanchéité et fixer ledit bord libre sur la première partie dudit boîtier. Brève description des dessins According to one embodiment of the invention, step b) of connecting the free edge comprises: - receiving inside a groove in the free edge of the second part of the housing a sealing element and fixing said free edge on the first part of said housing. Brief description of the drawings
Les buts, objets et caractéristiques de la présente invention, ainsi que ses avantages, apparaîtront plus clairement à la lecture de la présente description des modes de réalisation préférés d'un échangeur de chaleur selon l'invention, faite en référence aux dessins, dans lesquels : la figure 1 représente une vue en perspective d'un échangeur de chaleur selon la présente invention, The objects, objects and features of the present invention, as well as its advantages, will appear more clearly on reading the present description of the preferred embodiments of a heat exchanger according to the invention, with reference to the drawings, in which FIG. 1 represents a perspective view of a heat exchanger according to the present invention,
- la figure 2 est une vue éclatée de l'échangeur de chaleur représenté sur la figure 1 ,  FIG. 2 is an exploded view of the heat exchanger shown in FIG. 1;
la figure 3 représente une vue de dessous, de trois-quarts, de la deuxième partie du boîtier de l'échangeur de chaleur selon l'invention, et  FIG. 3 represents a view, from below, of three-quarters, of the second part of the heat exchanger housing according to the invention, and
- la figure 4 est une vue en coupe d'un échangeur de chaleur selon la présente invention sur laquelle sont notamment représentées une boite collectrice et une des extrémités du faisceau d'échange de l'échangeur de chaleur selon la présente invention.  - Figure 4 is a sectional view of a heat exchanger according to the present invention on which are shown in particular a manifold and one end of the exchange beam of the heat exchanger according to the present invention.
Description détaillée detailed description
La description ci-après a pour but d'exposer l'invention de manière suffisamment claire et complète, notamment en se référant aux figures 1 -4, mais ne doit en aucun cas être considérée comme limitant l'étendue de la protection aux modes de réalisation décrits ci-après. The purpose of the following description is to explain the invention in a sufficiently clear and complete manner, in particular with reference to FIGS. 1-4, but in no case should it be considered as limiting the scope of the protection to the modes of realization described below.
Tel qu'indiqué précédemment, la figure 1 représente une vue en perspective d'un échangeur de chaleur 1 selon l'invention. Les différents éléments de l'échangeur de chaleur 1 sont visibles sur la figure 2. As indicated above, FIG. 1 represents a perspective view of a heat exchanger 1 according to the invention. The different elements of the heat exchanger 1 are visible in FIG.
L'échangeur de chaleur 1 comprend un boîtier constitué d'une première partie 1 1 en forme de plaque, adaptée pour former une des parois du boîtier 1 1 , 20, et d'une deuxième partie 20 en forme de réceptacle. Cette deuxième partie 20 en forme de réceptacle comprend un bord libre 25, adapté pour être fixé sur la surface plane de la première partie 1 1 , et ainsi former ainsi un boîtier 1 1 , 20. Ce boîtier 1 1 , 20 représente, en quelque sorte, la paroi ou l'enveloppe extérieure de l'échangeur de chaleur 1 selon la présente invention. Comme montré sur la figure 1 , l'échangeur de chaleur 1 est adapté pour recevoir en son sein un faisceau d'échange 15. Le faisceau d'échange 15 est constitué d'un empilement de tubes 12 et de boites collectrices 13, 14 fixées aux extrémités dudit empilement 12. La boite collectrice 13 est connectée à l'entrée 16 destinée à un premier fluide tel qu'un réfrigérant adapté pour permettre un échange de chaleur à l'intérieur de l'échangeur de chaleur 1 . La boite collectrice 14, quant à elle, est connectée à la sortie 17, également destinée audit premier fluide. L'agencement constitué par l'empilement des tubes 12 et des boites collectrices 13, 14 est connu de l'art antérieur et n'est donc pas décrit ici de façon détaillée. Les boites collectrices 13, 14 sont obtenues par l'assemblage de quatre pièces distinctes. Ces pièces comprennent une boite extrudée en forme de peigne, un collecteur fin en matériau plaqué et deux bouchons d'extrémité dont l'un est percé pour assurer le cheminement du premier fluide vers la bride. The heat exchanger 1 comprises a housing consisting of a first plate-shaped portion 1 1, adapted to form one of the walls of the housing 1 1, 20, and a second portion 20 in the form of a receptacle. This second portion 20 in the form of a receptacle comprises a free edge 25, adapted to be fixed on the flat surface of the first part 1 1, and thus form a housing January 1, 20. This housing 1 1, 20 is, in a way, the wall or the outer casing of the heat exchanger 1 according to the present invention. As shown in FIG. 1, the heat exchanger 1 is adapted to receive within it an exchange bundle 15. The exchange bundle 15 consists of a stack of tubes 12 and collecting boxes 13, 14 fixed at the ends of said stack 12. The header box 13 is connected to the inlet 16 for a first fluid such as a refrigerant adapted to allow heat exchange inside the heat exchanger 1. The manifold 14, meanwhile, is connected to the outlet 17, also for said first fluid. The arrangement constituted by the stack of tubes 12 and collector boxes 13, 14 is known from the prior art and is therefore not described here in detail. The manifolds 13, 14 are obtained by assembling four separate pieces. These parts comprise an extruded comb-shaped box, a thin collector of plated material and two end caps, one of which is pierced to ensure the flow of the first fluid to the flange.
Les éléments formant le faisceau d'échange 15 comprennent un matériau métallique. Ce matériau métallique est sélectionné pour permettre la fixation de l'empilement des tubes 12 et des boites collectrices 13, 14, fixées aux extrémités dudit empilement 12, grâce à un procédé de brasage. The elements forming the exchange beam 15 comprise a metallic material. This metal material is selected to allow the fixing of the stack of tubes 12 and manifolds 13, 14, fixed to the ends of said stack 12, by a brazing process.
Selon la présente invention, la paroi constituée par la première partie 1 1 comprend un matériau métallique. Ainsi, l'ensemble constitué par le faisceau d'échange 15, la première partie 1 1 adaptée pour former une paroi du boîtier 1 1 , 20, l'entrée 16 et la sortie 17 peut aisément être assemblé lors d'un procédé de brasage, procédé bien connu de l'homme de métier. Dans le mode de réalisation représenté en figure 2, la deuxième partie 20 du boîtier 1 1 , 20, a essentiellement la forme d'un réceptacle comprenant cinq parois et un bord libre 25. Ce bord libre 25 est adapté pour être connecté avec la paroi 1 1 , par exemple pour être fixé sur cette paroi 1 1 . La deuxième partie 20 du boîtier 1 1 , 20, est pourvue d'une entrée 21 destinée à un deuxième fluide tel que de l'eau. La deuxième partie 20 du boîtier 1 1 , 20, est également pourvue d'une sortie 22 destinée audit deuxième fluide. Le positionnement respectif de l'entrée 16 et de la sortie 17, destinées au premier fluide, et de l'entrée 21 et de la sortie 22, destinées au deuxième fluide, permet un échange de chaleur entre le premier fluide et le deuxième fluide, ce dernier circulant à contre-courant du premier fluide. According to the present invention, the wall formed by the first part 1 1 comprises a metallic material. Thus, the assembly constituted by the exchange beam 15, the first part 1 1 adapted to form a wall of the housing 1 1, 20, the inlet 16 and the outlet 17 can easily be assembled during a brazing process , a method well known to those skilled in the art. In the embodiment shown in FIG. 2, the second part 20 of the housing 1 1, 20 has essentially the shape of a receptacle comprising five walls and a free edge 25. This free edge 25 is adapted to be connected with the wall 1 1, for example to be fixed on this wall 1 1. The second portion 20 of the housing 1 1, 20, is provided with an inlet 21 for a second fluid such as water. The second part 20 of the housing 1 1, 20, is also provided with an outlet 22 intended to said second fluid. The respective positioning of the inlet 16 and the outlet 17, intended for the first fluid, and the inlet 21 and the outlet 22, intended for the second fluid, allows a heat exchange between the first fluid and the second fluid, the latter flowing against the current of the first fluid.
Pour assurer un fonctionnement optimal de l'échangeur de chaleur 1 , il est prépondérant que le bord libre 25 soit correctement connecté à (ou fixé sur) sur la première partie 1 1 . Comme représenté en figure 2, le bord libre 25 est adapté pour être fixé sur la première partie 1 1 à l'aide de dents de sertissage 18. Le résultat de la fixation obtenu par la coopération du bord libre 25 et des dents de sertissage 18 est visible sur la figure 4. De façon alternative, le bord libre 25 peut être fixé sur la première partie 1 1 à l'aide de tout matériau de fixation adapté tel que de la colle. Il s'avère en outre possible d'améliorer la fixation du bord libre 25 sur la première partie 1 1 en combinant un matériau de fixation adapté, par exemple de la colle, et des dents de sertissage 18. To ensure optimal operation of the heat exchanger 1, it is preponderant that the free edge 25 is correctly connected to (or fixed on) the first part 1 1. As shown in FIG. 2, the free edge 25 is adapted to be fixed on the first part 1 1 by means of crimping teeth 18. The result of the fixing obtained by the cooperation of the free edge 25 and the crimping teeth 18 is visible in Figure 4. Alternatively, the free edge 25 may be fixed on the first part 1 1 with any suitable fastening material such as glue. It is also possible to improve the fixing of the free edge 25 to the first part 1 1 by combining a suitable fastening material, for example glue, and crimping teeth 18.
Selon un mode de réalisation de l'invention (tel que montré sur la figure 3), un élément d'étanchéité 30 est positionné entre le bord libre 25 et la paroi 1 1 (visible sur la figure 2), améliorant ainsi l'étanchéité entre ledit bord libre 25 et ladite paroi 1 1 (visible sur la figure 2). According to one embodiment of the invention (as shown in FIG. 3), a sealing element 30 is positioned between the free edge 25 and the wall 1 1 (visible in FIG. 2), thus improving the tightness between said free edge 25 and said wall 1 1 (visible in Figure 2).
La figure 2 illustre une caractéristique particulièrement avantageuse de l'échangeur de chaleur 1 selon l'invention, à savoir que celui-ci permet de s'affranchir des contraintes de forme au niveau du boîtier 1 1 , 20. Plus précisément, comme illustré en figure 2, la deuxième partie 20 du boîtier 1 1 , 20, peut être déterminée de manière à suivre la forme imposée par le faisceau d'échange 15. Ainsi, les parois internes de la deuxième partie 20 du boîtier 1 1 , 20, sont adaptées pour être au voisinage immédiat ou, de préférence en contact, avec l'extérieur du faisceau d'échange 15. Lorsque les parois internes de la deuxième partie 20 du boîtier 1 1 , 20, sont adaptées pour être en contact avec l'extérieur du faisceau d'échange 15, le contact entre les parois internes et l'empilement des tubes 12 est réalisé localement sur des nervures 24 à très faible dépouille par rapport aux parois de la deuxième partie 20 du boîtier 1 1 , 20. Cela permet de limiter le cheminement du deuxième fluide entre les parois internes de la deuxième partie 20 du boîtier 1 1 , 20 et l'extérieur du faisceau d'échange 15, en forçant la circulation du deuxième fluide à l'intérieur dudit faisceau d'échange 15. FIG. 2 illustrates a particularly advantageous characteristic of the heat exchanger 1 according to the invention, namely that it makes it possible to overcome form constraints on the housing 1 1, 20. More precisely, as illustrated in FIG. 2, the second portion 20 of the housing 1 1, 20, can be determined so as to follow the shape imposed by the exchange beam 15. Thus, the inner walls of the second portion 20 of the housing 1 1, 20, are adapted to be in the immediate vicinity or preferably in contact with the outside of the exchange beam 15. When the internal walls of the second part 20 of the housing 1 1, 20, are adapted to be in contact with the outside of the exchange beam 15, the contact between the inner walls and the stack of the tubes 12 is made locally on ribs 24 with very small clearance relative to the walls of the second portion 20 of the housing 1 1, 20. This allows limit er the path of the second fluid between the inner walls of the second portion 20 of the housing 1 1, 20 and the outside of the beam exchange 15, forcing the circulation of the second fluid inside said exchange beam 15.
Comme représenté sur la figure 2, l'entrée 21 et la sortie 22, toutes deux destinées au deuxième fluide, sont positionnées au niveau des évidements où se logent les boites collectrices 13, 14. Ainsi, les performances de l'échangeur de chaleur 1 , c'est- à-dire les échanges de chaleur entre le premier et le deuxième fluide, sont optimisées grâce au fait qu'une grande partie de la surface d'échange - voire toute la surface d'échange - est immergée dans le deuxième fluide. As shown in FIG. 2, the inlet 21 and the outlet 22, both intended for the second fluid, are positioned at the recesses where the collecting boxes 13, 14 are housed. Thus, the performance of the heat exchanger 1 , ie the exchanges of heat between the first and the second fluid, are optimized thanks to the fact that a large part of the exchange surface - or the entire exchange surface - is immersed in the second fluid.
Les nervures 23 présentes à l'extérieur des parois de la deuxième partie 20 du boîtier 1 1 , 20, permettent, quant à elles, d'augmenter la rigidité de ladite deuxième partie 20. Le bord libre 25 de la deuxième partie 20 du boîtier 1 1 , 20 est clairement visible sur la figure 3. Ce bord libre 25 est pourvu d'une collerette 26, particulièrement adaptée pour permettre la connexion du bord libre 25 sur la première partie 1 1 du boîtier 1 1 ,20. La collerette 26 peut ainsi coopérer avec les dents de sertissage 18 de la première partie 1 1 afin de garantir une connexion étanche du bord libre 25 sur la première partie 1 1 du boîtier 1 1 , 20. The ribs 23 present outside the walls of the second portion 20 of the housing 1 1, 20, in turn, increase the rigidity of said second portion 20. The free edge 25 of the second portion 20 of the housing 1, 20 is clearly visible in Figure 3. This free edge 25 is provided with a flange 26, particularly adapted to allow the connection of the free edge 25 to the first part 1 1 of the housing 1 1, 20. The flange 26 can thus cooperate with the crimping teeth 18 of the first part 1 1 to ensure a tight connection of the free edge 25 to the first part 1 1 of the housing 1 1, 20.
Comme représenté en figure 3, un élément d'étanchéité 30 (tel qu'un joint) est présent, ledit élément d'étanchéité 30 pouvant être intercalé entre le bord libre 25 et la première partie 1 1 du boîtier 1 1 , 20, améliorant de ce fait l'étanchéité du contact entre le bord libre 25 et la première partie 1 1 du boîtier 1 1 , 20. Le bord libre 25, pourvu d'une rainure 27 permettant d'envelopper au moins partiellement l'élément d'étanchéité 30, accueille ainsi ledit élément d'étanchéité 30. L'élément d'étanchéité 30 est réalisé, par exemple, à l'aide d'une matière souple telle que du caoutchouc. Tel qu'indiqué, la figure 4 représente une vue en coupe de la partie de l'échangeur de chaleur 1 comprenant notamment la boite collectrice. L'on observe, sur cette figure 4, l'entrée 21 destinée au deuxième fluide tel que de l'eau et permettant audit deuxième fluide de circuler entre les tubes adjacents. Sur cette figure 4 est également visible la sortie 17 destinée au premier fluide (réfrigérant), laquelle sortie 17 est connectée aux tubes via la boite collectrice 14, et permettant aux premier et deuxième fluides de circuler à l'intérieur de circuits séparés. La fixation du bord libre 25 sur la première partie 1 1 à l'aide des dents de sertissage 18. Les dents de sertissage 18 sont fixées sur la collerette 26. Dans la figure 4, il est montré que le bord libre 25 est pourvu d'une rainure 27. Cette rainure 27 est adaptée pour recevoir au moins une partie d'un élément d'étanchéité 30. Pendant la fixation du bord libre 25 sur la première partie 1 1 , la présence d'un tel élément d'étanchéité 30 peut améliorer l'étanchéité de la connexion entre la première partie 1 1 et la deuxième partie 20 du boîtier 1 1 , 20. As shown in FIG. 3, a sealing element 30 (such as a seal) is present, said sealing element 30 being able to be inserted between the free edge 25 and the first part 1 1 of the housing 1 1, 20, improving thereby sealing the contact between the free edge 25 and the first part 1 1 of the housing 1 1, 20. The free edge 25, provided with a groove 27 for enveloping at least partially the sealing member 30, thus accommodates said sealing member 30. The sealing member 30 is made, for example, using a flexible material such as rubber. As indicated, FIG. 4 represents a sectional view of the part of the heat exchanger 1 comprising in particular the manifold. This FIG. 4 shows the inlet 21 intended for the second fluid such as water and allowing said second fluid to flow between the adjacent tubes. In this figure 4 is also visible the output 17 for the first fluid (refrigerant), which output 17 is connected to the tubes via the manifold box 14, and allowing the first and second fluids to flow inside separate circuits. Fixing the free edge 25 to the first part 1 1 with the crimping teeth 18. The crimping teeth 18 are fixed on the flange 26. In FIG. 4, it is shown that the free edge 25 is provided with A groove 27. This groove 27 is adapted to receive at least a portion of a sealing member 30. During attachment of the free edge 25 to the first portion 1 1, the presence of such a sealing member 30 can improve the sealing of the connection between the first portion 1 1 and the second portion 20 of the housing 1 1, 20.
L'échangeur de chaleur 1 selon l'invention est obtenu à l'aide d'un procédé pour assembler l'échangeur de chaleur 1 dans lequel, dans une première étape, l'ensemble constitué par le faisceau d'échange 15, la première partie 1 1 , l'entrée 16 et la sortie 17 est assembler par brasage, les différents éléments étant tous en matériau métallique. The heat exchanger 1 according to the invention is obtained by means of a method for assembling the heat exchanger 1 in which, in a first step, the assembly constituted by the exchange beam 15, the first Part 1 1, the inlet 16 and the outlet 17 is assembled by brazing, the various elements being all of metal material.
Une fois l'ensemble du faisceau d'échange 15 et de la première partie 1 1 obtenu, l'échangeur de chaleur 1 est obtenu en connectant le bord libre 25 de la deuxième partie 20 du boîtier 1 1 , 20 sur la première partie 1 1 du boîtier 1 1 , 20. Once the whole of the exchange bundle 15 and the first part 1 1 obtained, the heat exchanger 1 is obtained by connecting the free edge 25 of the second part 20 of the housing 1 1, 20 on the first part 1 1 of the housing 1 1, 20.
Concernant l'obtention de la deuxième partie 20 du boîtier 1 1 , 20, celle-ci est obtenue, de préférence, au moyen d'un procédé de moulage, tel qu'un procédé moulage par injection. Ladite deuxième partie 20 du boîtier 1 1 , 20, étant réalisée à l'aide de matière plastique, cela offre une liberté optimale quant à la forme de ladite partie 20. A titre d'exemple, le positionnement de l'entrée 21 et de la sortie 22 de la deuxième partie 20 du boîtier 1 1 , 20, peut être aisément optimisé notamment afin de prendre en compte l'emplacement de l'échangeur de chaleur 1 au sein d'un véhicule automobile, ainsi que les utilisations finales souhaitées de cet échangeur de chaleur 1 . De manière particulièrement avantageuse, sans devoir modifier ni la forme, ni le fonctionnement, du faisceau d'échange 15, le positionnement de l'entrée 21 et de la sortie 22 au sein de la deuxième partie 20 du boîtier 1 1 , 20, peut être optimisé afin d'améliorer le contact avec une entrée et une sortie destinées au deuxième fluide. With regard to obtaining the second part 20 of the housing 11, 20, this is preferably obtained by means of a molding process, such as an injection molding process. Said second part 20 of the housing 1 1, 20, being made of plastic material, this offers an optimal freedom as to the shape of said portion 20. By way of example, the positioning of the inlet 21 and the outlet 22 of the second part 20 of the housing 1 1, 20, can be easily optimized in particular to take into account the location of the heat exchanger 1 within a motor vehicle, as well as the desired end uses of this heat exchanger 1. Particularly advantageously, without having to modify the shape or the operation of the exchange beam 15, the positioning of the inlet 21 and the outlet 22 within the second portion 20 of the housing 1 1, 20 can be optimized to improve the contact with an inlet and an outlet for the second fluid.
En outre, de manière particulièrement avantageuse, la forme plane de la première partie 1 1 du boîtier 1 1 , 20 (en forme de plaque) permet d'obtenir un volume intérieur du boîtier 1 1 , 20 plus important que celui offert par les boîtiers de l'art antérieur, ce volume intérieur plus important étant disponible pour le faisceau d'échange 15, tout en conservant un volume extérieur et, par conséquent, un encombrement identiques à ceux des boîtiers de l'art antérieur. En d'autres termes, pour un même encombrement global, l'invention permet d'accroître la surface d'échange de chaleur par rapport aux dispositifs de l'art antérieur en ajoutant, par exemple, des tubes additionnels dans l'empilement de tubes 12 formant le faisceau d'échange 15 et, par conséquent, d'accroître la capacité de l'échangeur de chaleur à dissiper de la chaleur. In addition, particularly advantageously, the flat shape of the first part 1 1 of the housing 1 1, 20 (plate-shaped) makes it possible to obtain an interior volume of the housing 1 1, 20 greater than that offered by the housings of the prior art, this larger interior volume being available for the exchange beam 15, while maintaining an external volume and, therefore, a size identical to those of the housings of the prior art. In other words, for the same overall size, the invention makes it possible to increase the heat exchange surface area with respect to the devices of the prior art by adding, for example, additional tubes in the stack of tubes. 12 forming the exchange beam 15 and, therefore, to increase the capacity of the heat exchanger to dissipate heat.

Claims

Revendications claims
Echangeur de chaleur (1) pour échanger de la chaleur entre un premier fluide et un deuxième fluide, ledit échangeur de chaleur (1) comprenant un faisceau d'échange (15) et un boîtier (11, 20) adapté pour envelopper ledit faisceau d'échange (15), dans lequel l'échangeur de chaleur (1) est pourvu d'une entrée (16) et d'une sortie (17) destinées au premier fluide et d'une entrée (21) et d'une sortie (22) destinées au deuxième fluide, caractérisé en ce que, le boîtier (11, 20) est constitué d'une première partie (11) essentiellement plane ou, de préférence, plane, adaptée pour former une paroi dudit boîtier, et d'une deuxième partie (20) en forme de réceptacle, ladite deuxième partie (20) comprenant un bord libre (25) adapté pour être connecté avec ladite première partie (11), et ainsi former ledit boîtier (11, 20). Heat exchanger (1) for exchanging heat between a first fluid and a second fluid, said heat exchanger (1) comprising an exchange bundle (15) and a housing (11, 20) adapted to enclose said bundle of heat exchange (15), wherein the heat exchanger (1) is provided with an inlet (16) and an outlet (17) for the first fluid and an inlet (21) and an outlet (22) for the second fluid, characterized in that the housing (11, 20) consists of a substantially flat or preferably planar first portion (11) adapted to form a wall of said housing, and a second receptacle-shaped portion (20), said second portion (20) including a free edge (25) adapted to be connected with said first portion (11), and thereby forming said housing (11, 20).
Echangeur de chaleur (1) selon la revendication 1, dans lequel la première partie (11) du boîtier (11, 20) fait partie intégrante du faisceau d'échange (15). Heat exchanger (1) according to claim 1, wherein the first portion (11) of the housing (11, 20) is an integral part of the exchange beam (15).
Echangeur de chaleur (1) selon la revendication 2, dans lequel la première partie (11) du boîtier (11, 20) et le faisceau d'échange (15) sont assemblés par brasage. Heat exchanger (1) according to claim 2, wherein the first portion (11) of the housing (11, 20) and the exchange beam (15) are brazed together.
Echangeur de chaleur (1) selon l'une des revendications précédentes, dans lequel la première partie (11) du boîtier (11, 20) comprend un matériau métallique et dans lequel la deuxième partie (20) du boîtier (11, 20) comprend un matériau plastique. Heat exchanger (1) according to one of the preceding claims, wherein the first portion (11) of the housing (11, 20) comprises a metallic material and wherein the second portion (20) of the housing (11, 20) comprises a plastic material.
Echangeur de chaleur (1) selon l'une des revendications précédentes, dans lequel la première partie (11) est pourvue de moyens de fixation (18) pour fixer le bord libre (25) de la deuxième partie (20) du boîtier (11, 20) sur la première partie (11) du boîtier. Heat exchanger (1) according to one of the preceding claims, wherein the first part (11) is provided with fixing means (18) for fixing the free edge (25) of the second part (20) of the housing (11). , 20) on the first part (11) of the housing.
Echangeur de chaleur (1) selon la revendication 5, dans lequel les moyens de fixation (18) comprennent des dents de sertissage (18), adaptées pour fixer le bord libre (25) de la deuxième partie (20) du boîtier (1 1 , 20) sur la première partie (1 1 ) du boîtier Heat exchanger (1) according to claim 5, wherein the fastening means (18) comprise crimping teeth (18), adapted to fix the free edge (25) of the second housing part (20) (1 1, 20) on the first housing part (1 1)
7. Echangeur de chaleur (1 ) selon la revendication 6, dans lequel le bord libre (25) présente une collerette (26) et dans lequel les dents de sertissage (18) sont adaptées pour fixer ladite collerette (26) sur la première partie (1 1 ) du boîtier (1 1 , 20). 7. heat exchanger (1) according to claim 6, wherein the free edge (25) has a flange (26) and wherein the crimping teeth (18) are adapted to fix said flange (26) on the first part (1 1) of the housing (1 1, 20).
8. Echangeur de chaleur (1 ) selon l'une des revendications précédentes, dans lequel le bord libre (25) de la première partie (1 1 ) comprend une rainure (27) adaptée pour recevoir un élément d'étanchéité (30) tel qu'un joint. 8. heat exchanger (1) according to one of the preceding claims, wherein the free edge (25) of the first portion (1 1) comprises a groove (27) adapted to receive a sealing element (30) as than a seal.
9. Echangeur de chaleur (1 ) selon l'une des revendications précédentes, dans lequel l'entrée (16) et la sortie (17) destinées au premier fluide sont disposées sur la première partie (1 1 ) du boîtier (1 1 , 20) et dans lequel l'entrée (21 ) et la sortie (22) destinées au deuxième fluide sont disposées sur la deuxième partie (20) du boîtier (1 1 , 20). 9. heat exchanger (1) according to one of the preceding claims, wherein the inlet (16) and the outlet (17) for the first fluid are arranged on the first portion (1 1) of the housing (1 1, 20) and wherein the inlet (21) and the outlet (22) for the second fluid are disposed on the second portion (20) of the housing (1 1, 20).
10. Echangeur de chaleur (1 ) selon la revendication 9, dans lequel le faisceau d'échange (15) comprend un empilement de tubes (12) et des boites collectrices (13, 14) aux extrémités dudit empilement (12), respectivement connectées à l'entrée (16) et la sortie (17) destinées au premier fluide. 10. heat exchanger (1) according to claim 9, wherein the exchange beam (15) comprises a stack of tubes (12) and manifolds (13, 14) at the ends of said stack (12), respectively connected at the inlet (16) and the outlet (17) for the first fluid.
1 1 . Procédé pour assembler un échangeur de chaleur (1 ) selon l'une des revendications 1 à 10 comprenant les étapes suivantes : a) assembler par brasage l'ensemble formé du faisceau d'échange (15) et de la première partie (1 1 ) du boîtier (1 1 , 20), et 1 1. A method for assembling a heat exchanger (1) according to one of claims 1 to 10 comprising the following steps: a) assembling by brazing the formed assembly of the exchange beam (15) and the first portion (1 1) of the housing (1 1, 20), and
b) connecter le bord libre (25) de la deuxième partie (20) du boîtier (1 1 , 20) et la première partie (1 1 ) du boîtier (1 1 , 20). b) connect the free edge (25) of the second part (20) of the housing (1 1, 20) and the first part (1 1) of the housing (1 1, 20).
12. Procédé selon la revendication 1 1 , lorsqu'elle dépend de la revendication 5 ou 6, dans lequel l'étape b) de connexion du bord libre (25) comprend : 12. The method of claim 1 1, when dependent on claim 5 or 6, wherein the step b) of connecting the free edge (25) comprises:
- fixer le bord libre (25) de la deuxième partie (20) du boîtier (1 1 , 20) sur la première partie (1 1 ) du boîtier (1 1 , 20) au moyen de dents de sertissage (18). - Fix the free edge (25) of the second portion (20) of the housing (1 1, 20) on the first portion (1 1) of the housing (1 1, 20) by means of crimping teeth (18).
13. Procédé selon la revendication 1 1 ou 12, dans lequel l'étape b) de connexion du bord libre (25) comprend : 13. The method of claim 1 1 or 12, wherein the step b) of connecting the free edge (25) comprises:
- fixer le bord libre (25) de la deuxième partie (20) du boîtier (1 1 , 20) sur la première partie (1 1 ) via un élément d'étanchéité (30). - Fix the free edge (25) of the second part (20) of the housing (1 1, 20) on the first part (1 1) via a sealing element (30).
14. Procédé selon la revendication 13, dans lequel l'étape b) de connexion du bord libre (25) comprend : The method of claim 13, wherein step b) of connecting the free edge (25) comprises:
- recevoir dans une rainure (27) dans le bord libre (25) de la deuxième partie (20) du boîtier (1 1 , 20) un élément d'étanchéité (30) et fixer ledit bord libre (25) sur la première partie (1 1 ) dudit boîtier (1 1 ,20). - receiving in a groove (27) in the free edge (25) of the second portion (20) of the housing (1 1, 20) a sealing member (30) and fix said free edge (25) on the first part (1 1) of said housing (1 1, 20).
EP16804828.8A 2015-10-28 2016-10-28 Heat exchanger comprising an exchange bundle, housing designed to encase same and method for assembling such a heat exchanger Withdrawn EP3368850A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1560291A FR3043189B1 (en) 2015-10-28 2015-10-28 HEAT EXCHANGER COMPRISING AN EXCHANGE BEAM, HOUSING ADAPTED TO ENVELOP THE SAME, AND A METHOD FOR ASSEMBLING SUCH A HEAT EXCHANGER
PCT/FR2016/052816 WO2017072467A1 (en) 2015-10-28 2016-10-28 Heat exchanger comprising an exchange bundle, housing designed to encase same and method for assembling such a heat exchanger

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EP (1) EP3368850A1 (en)
FR (1) FR3043189B1 (en)
WO (1) WO2017072467A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2962199B1 (en) * 2010-06-30 2012-09-21 Valeo Systemes Thermiques CONDENSER, IN PARTICULAR FOR AIR CONDITIONING SYSTEM OF A MOTOR VEHICLE.
FR2965336B1 (en) 2010-09-28 2012-09-14 Valeo Systemes Thermiques SET OF A BIPHASIC HEAT EXCHANGER AND BOTTLE
FR2965337B1 (en) * 2010-09-28 2014-10-10 Valeo Systemes Thermiques SET OF A BIPHASIC HEAT EXCHANGER AND BOTTLE
FR3013110B1 (en) * 2013-11-08 2018-11-09 Valeo Systemes Thermiques HEAT EXCHANGER COMPRISING AN EXCHANGE BEAM CONNECTED TO TWO EXTREMITIES OPPOSED TO THE WALLS OF THE HOUSING
FR3019641B1 (en) * 2014-04-03 2019-06-14 Valeo Systemes Thermiques HEAT EXCHANGER COMPRISING AN EXCHANGE BEAM WITH MEANS FOR IMPROVING THE ATTACHMENT OF THE EXCHANGE BEAM TO THE WALLS OF A HOUSING

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FR3043189A1 (en) 2017-05-05
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