EP1782012B1 - Easy-to-mount heat exchanger with improved heat transfer - Google Patents

Easy-to-mount heat exchanger with improved heat transfer Download PDF

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Publication number
EP1782012B1
EP1782012B1 EP05793075A EP05793075A EP1782012B1 EP 1782012 B1 EP1782012 B1 EP 1782012B1 EP 05793075 A EP05793075 A EP 05793075A EP 05793075 A EP05793075 A EP 05793075A EP 1782012 B1 EP1782012 B1 EP 1782012B1
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EP
European Patent Office
Prior art keywords
rib
heat exchanger
groove
exchanger according
junction
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EP05793075A
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German (de)
French (fr)
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EP1782012A1 (en
Inventor
Gaël LE DUC
Bruno Berthome
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Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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    • 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
    • F28D7/0008—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 for one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0025—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 for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove

Definitions

  • the invention relates to the field of heat exchangers, for example for an air conditioning circuit of a motor vehicle.
  • a heat exchanger comprising a body in which are formed a series of first fluid circulation channels and a series of second interchanged fluid circulation channels.
  • Such a heat exchanger is known for example from the document JP 2003-121086 which describes the use of an extruded profile as a body in which first and second fluid circulation channels are provided. It is necessary to connect the first and second fluid circulation channels to separate manifolds or manifolds. To do this, JP 2003-121086 provides that the section transversely traverses a first and a second collector, both cylindrical. A first cut of the profile wall at the first cylindrical collector contacts the inside of the cylindrical collector and the first fluid circulation channels. A second cut made at the second cylindrical collector communicates the interior of the second cylindrical collector and the second fluid circulation channels.
  • Such an exchanger is also known from the document JP 2004 150673 A .
  • the document JP 2003-279 27.6 discloses a heat exchanger whose body is in the form of a single piece in which are formed a series of channels of circulation of fluid aligned. At the ends of the one-piece piece are then produced series of cuts for making series of teeth which are traversed by the fluid circulation channels. For each end of the one-piece piece, the teeth of the series of teeth are alternately folded on one side and the other of a plane containing the bulk of the one-piece piece, defining a series of first teeth and a series of second teeth. The teeth are then received in separate cylindrical or collecting manifolds, which can be connected to the rest of the air conditioning circuit.
  • Such a heat exchanger is difficult to achieve, in particular because of the operation of cutting and bending teeth.
  • the object of the invention is in particular to overcome the aforementioned drawbacks by proposing a heat exchanger of the type mentioned above, in which the body comprises a first crenellated profile body element comprising at least a first groove and at least a first groove. rib, each first rib housing at least one of the first fluid flow channels, and a second crenellated body member having at least one second rib and at least one second groove, each second rib housing at least one second fluid flow channels, the first and second body members interlocking so that each first rib and each second rib are received respectively in a second groove and a first groove.
  • the profile of the first body member includes a plurality of first grooves alternating with a plurality of first ribs and the profile of the second body member includes a plurality of second ribs alternating with a plurality of second grooves.
  • each first rib houses one of the first fluid circulation channels
  • each second rib houses one of the second fluid circulation channels, so that the first and second channels are interposed. This configuration provides good heat exchange performance.
  • each first groove and each second rib are of conjugate shapes so that each first groove completely houses a second rib
  • each second groove and each first rib are of conjugate shapes so that each second groove completely houses a first rib.
  • this configuration improves the heat exchange between the fluid flowing through the channels housed in the first rib or ribs and the fluid flowing through the channels housed in the second rib or ribs.
  • This form cooperation also improves the pressure resistance of the assembled body members, since each rib of one body member contributes to supporting the force resulting from the deformation of the adjacent rib of the other body member. Similarly, the pressures exerted by the fluids traversing two adjacent ribs of different body elements, tend to compensate for themselves through this form cooperation.
  • the first body member comprises a first junction face and the second body member comprises a second junction face, each first and second rib respectively projecting from the first and second faces of the junction face. junction so that each first and second rib jointly defines the first and second junction faces respectively a first and a second groove.
  • This configuration is easy to implement because only the rib or ribs projecting from the joining faces are to be realized. In addition, this configuration makes it easier to nest body elements.
  • the second body member further comprises a third junction face of which projects at least one third rib defining at least one third groove, each third rib housing at least one of the third channels of fluid circulation.
  • the exchanger then further comprises a third crenellated profile body element comprising a fourth junction face from which at least one fourth rib and at least one fourth groove protrude, each fourth rib housing at least one of the fourth channels of fluid flow, the second and third body members interlocking so that each third rib and each fourth rib are received respectively in a fourth and a third groove.
  • a third crenellated profile body element comprising a fourth junction face from which at least one fourth rib and at least one fourth groove protrude, each fourth rib housing at least one of the fourth channels of fluid flow, the second and third body members interlocking so that each third rib and each fourth rib are received respectively in a fourth and a third groove.
  • each second rib is facing a third groove and in that each third rib is opposite a second groove, which reduces the material used in the construction of the heat exchanger and in particular the material present between the fluid circulation channels, which impairs the heat exchange.
  • At least one of the body members has a free face opposite a junction face, said free face having at least one additional groove facing a rib of the junction face.
  • This additional groove allows "removal" of the material and thus makes the manufacture of the heat exchanger less expensive raw material.
  • the heat exchanger is also lighter and this removal of material prevents unnecessary heat storage at the free face.
  • each rib of each junction face extends on either side of said junction face so as to form in each case a first and a second tooth.
  • the heat exchanger then comprises first and second fluid collectors attached to each body element, the first and second collectors being each provided with holes of a shape adapted to accommodate at least part of said teeth so that the circulation channels of the fluid flow each into a first and a second collector. This is a simple way of connecting the fluid circulation channels to the collectors, which are then connected to the rest of the air conditioning circuit, for example.
  • each first rib of said first body member has bent portions each connecting a tooth to a central portion of the first rib so that said first and second teeth are respectively disposed in planes inclined with respect to said first junction face, this allows to shift the collectors of the plane in which the body of the heat exchanger is located in order to gain space and not to interfere with the support of the second body member coming into interlocking with the first body member.
  • each second rib of said second body member has a bent portion connecting a first and second teeth to a central portion of said second rib so that each tooth is disposed in an inclined plane. relative to said second junction face.
  • each fourth rib of said third body member has a bent portion connecting a first and a second tooth to a central portion of said fourth rib so that each tooth is disposed in a plane inclined relative to said fourth junction face. In this case, there is enough space to accommodate adjunct collectors at the second body member.
  • first and second tooth of the second and third junction faces are respectively received in the same first collector on the one hand and in the same second collector on the other hand.
  • first fluid flow channels and the second fluid flow channels are formed in the first and second grooves respectively so that the first fluid flow channels and the second circulation channels of fluid are aligned. This makes it possible to reduce the gap between the fluid circulation channels in order to improve the heat exchange.
  • each body member is formed as a profiled and integral piece, obtained, for example, by extrusion, which constitutes a simple implementation of the invention.
  • the realization of the body members as one-piece pieces provides the best resistance to pressure possible. Extrusion makes it easy to make the fluid circulation channels.
  • each first rib and each second groove are of jointly selected dimensions in a tight fit.
  • the filler metal is capable of weakening the corrosion resistance of the body and reducing its mechanical resistance to the pressure exerted by the fluids.
  • the heating and cooling of the body elements induce a change in their metallographic structure; these modifications are likely to reduce the resistance to pressure of the exchanger body.
  • the ribs of at least one of the body members may have a trapezoidal or square section.
  • each first rib, each second groove, each first groove and the second ribs are of identical section so that the first and second body members are of identical shape.
  • the body elements are made as identical pieces which are then matched. This reduces costs and facilitates the manufacture of the heat exchanger.
  • the body elements of which each rib has bent portions are bent in the vicinity of their ends to form said bent portions, which allows to bend all the ribs in the same manufacturing process.
  • the heat exchanger is made in the form of an internal heat exchanger for an air conditioning circuit.
  • the figure 1 illustrates a heat exchanger 1 according to the invention in a first embodiment, seen in perspective.
  • the heat exchanger 1 consists of a first body element 2 and a second body element 4, both of elongated shape and of generally rectangular shape, made in the form of metal sections, the section of which is illustrated on the figure 2 which is a cross-section of the body members 2 and 4 assembled in a plane (X, Z).
  • the body members 2 and 4 have crenellated profiles composed of first and second longitudinal ribs 6 and 8 respectively, of square section running along the body members 2 and 4 respectively.
  • the first 6 and second 8 longitudinal ribs respectively protrude from a first 10 and a second 12 substantially rectangular junction face and each respectively opposite to a free face also rectangular designated by the reference numerals 9 and 11.
  • the second and first longitudinal ribs together with the first 10 and second 12 junction faces define a series of longitudinal grooves 14 and 16 of square section and whose dimensions are similar to the dimensions of the second 8 and first 6 longitudinal ribs respectively.
  • Each first or second longitudinal groove 14 has the first or second junction face 12 as the bottom and the flanks of the first or second longitudinal ribs respectively.
  • the first 6 and second 8 longitudinal ribs are traversed respectively by the first 18 and second longitudinal fluid circulation channels of circular section and intended respectively for the circulation of a first and a second fluid through the heat exchanger.
  • first fluid and second fluid may designate the same fluid taken in different temperature and / or pressure states.
  • first fluid refers to the gas in a state of high pressure and high temperature while the term “second fluid” relates to that gas. same gas at a different point of the circuit in a state of low pressure and low temperature.
  • the first longitudinal ribs 6 are in contact all around their perimeter with the periphery of the second longitudinal grooves 16 and the periphery of the second longitudinal ribs 8 are in contact with the perimeters of the first longitudinal grooves 16. In so doing, a heat exchange takes place between the first 18 and the second 20 fluid circulation channels via the first 2 and second 4 body members, themselves brought into thermal contact through the grooves and ribs.
  • the tolerance on the dimensions of the first 6 and second 8 longitudinal ribs as well as the first 14 and second 16 longitudinal grooves intended to receive them is preferably chosen so as to ensure a tight fit between the first 2 and second 4 body members. In doing so, the assembly or the nesting of the first 2 and second 4 body elements can be done in force, for example by means of a press, and thus makes it possible to do without a weld, which night, in particular because of the necessary filler metal, thermal exchanges between the first 2 and second 4 body elements.
  • the figure 3 illustrates an alternative embodiment of the heat exchanger of the figure 1 , in which the first 9 and second 11 free faces of the first 2 and second 4 body members respectively have series of additional longitudinal grooves respectively 22 and 24 respectively opposite the first 6 and second 8 longitudinal grooves and intended to remove material in order to reduce the raw material costs, to reduce the mass of the heat exchanger, and especially to avoid unnecessary heat loss, by the free faces, favoring their thermal insulation. This insulation is favored by the recess of part of the material.
  • the first 2 and second 4 body members are bent or bent at either of their respective ends at an angle of about 90 °.
  • the folding of the first 2 and second 4 body elements print to the first 6 and second 8 longitudinal ribs portions of the bent portions of the another of a substantially flat portion.
  • the bent portions of the first longitudinal ribs 6 of the first body member 2 are designated by the numerical references 26 and 28, while the bent portions of the second longitudinal ribs 8 of the second body member 4 are respectively designated by the numerals 30 and 32. .
  • the first longitudinal ribs 6 extend on either side of the first junction face 14, in the continuity of the bent portions 26 and 28, by first series of teeth 34, which are of identical section to the first longitudinal ribs 6.
  • the first series of teeth 34 are traversed by the first fluid circulation channels 18. From the bent portions 26 and 28, the first series of teeth 34 are disposed in planes inclined at substantially 90 ° to the first junction face 14 .
  • the second longitudinal ribs 8 of the second body member 4 extend on either side of the second junction face 16 by second series of teeth 36 whose section is identical to the section of the second longitudinal ribs 8 and which are traversed by the second fluid circulation channels 20.
  • bent portions 26, 28, 30 and 32 separate the series of teeth 34 and 36 from the junction faces 14 and 16 opposite the other body element 2 or 4.
  • Each series of teeth 34 and 36 is received in cylindrical fluid manifolds 40 and consist of two semi-cylindrical shells 42 and 44 assembled to one another.
  • one of the half-cylindrical half-shells 44 has a succession of holes 46 of identical section to the section of the first 34 and second 36 series 46 teeth.
  • Each fluid manifold 40 thus receives the first 34 or second 36 series of teeth, so that the first 18 or second 20 fluid circulation channels open into the fluid manifolds 40.
  • the junction between the fluid manifolds 40 and the remainder of a hydraulic circuit is provided via a nut system 48 adapted for connection of a fluid circulation hose and well known to those skilled in the art.
  • first 2 and second 4 body members are made as profiled monobloc pieces obtained by extrusion.
  • the curvature of the first 2 and second 4 body members is achieved by a subsequent bending operation.
  • first 6 and second 8 longitudinal ribs square section other forms are possible, as illustrated by the figure 4 , which has longitudinal grooves 6 and 8 of trapezoidal section, the large base is supported on the first 10 and second 12 junction faces.
  • the first 18 and second 20 fluid circulation channels have been described here in section and in identical dimension, but it is conceivable to provide channels of different shape and / or different size.
  • Such a heat exchanger 1 is particularly suitable for exchanging heat between fluids at very high pressure. Indeed, monobloc parts are particularly adapted to withstand high pressures. In addition, in the arrangement illustrated herein, the pressure within the first and second fluid flow channels tends to hold together the first 2 and second 4 body members.
  • FIG 6 is a perspective and partial view of a heat exchanger 50 according to the invention in an alternative embodiment, intended to allow a heat exchange between three fluids in circulation inside the heat exchanger 50.
  • figure 6 is to be considered together with the figure 7 which is a cross-section of the heat exchanger 50 of the figure 6 .
  • an intermediate body member 51 which is in the form of an elongated profiled profile member castellated.
  • the intermediate body element 51 has a third junction face 52 and a fourth opposing junction face 54 facing each other and which are projecting respectively from the third 56 and fourth 58 longitudinal ribs of square section and of similar shape to the longitudinal ribs described above.
  • the third and fourth longitudinal ribs 58 define a series of longitudinal grooves 60 and 62 together with the third 52 and fourth 54 junction faces.
  • the third and fourth longitudinal grooves 60 and 62 fit exactly the first 6 and second 8 longitudinal grooves of the first 2 and second 4 body members as described above.
  • the third 56 and fourth 58 longitudinal ribs are traversed by third 64 and fourth 66 fluid circulation channels, of circular section and identical.
  • the intermediate body member 51 is not bent at its ends.
  • the third 56 and fourth 58 longitudinal ribs extend on either side of the third 52 fourth 54 junction faces into third and fourth sets of teeth of identical section to unrepresented ribs.
  • the third and fourth sets of teeth are arranged in planes identical to the plane containing most of the intermediate body element 51.
  • the third and fourth sets of teeth are received in fluid manifolds 40 of the type described above.
  • the bending of the first 2 and second 4 body members allows to provide sufficient space for disposing the fluid collectors 40 to the intermediate body member 51.
  • the overall size of the heat exchanger of the figure 6 is reduced.
  • third 56 and fourth 58 longitudinal ribs of square section but other forms are possible for example trapezoidal sections.
  • the exchanger object of the invention may comprise several elements of intermediate bodies 51 stacked and nested within each other. This, in order to increase the heat exchange capacity of the body for a given space in the direction Y.
  • the intermediate body members 51 would be bent at their ends, so as to accommodate the corresponding collectors.
  • the body members are made of aluminum alloy, but other materials are possible.
  • the figure 8 illustrates an air conditioning circuit, for example for a motor vehicle, in which is integrated the heat exchanger 1 of the figure 1 .
  • the air conditioning circuit of the figure 8 essentially comprises a compressor 80.
  • a refrigerant, for example carbon dioxide CO2 sent by the compressor 80 then passes through a gas cooler 82, from which it emerges in a high pressure and high temperature.
  • the fluid passes through the internal heat exchanger 1 by passing through the first fluid circulation channel 18 and is then expanded in a pressure reducer 84.
  • the fluid thus expanded is then conveyed to an evaporator 86 and then to an accumulator 88, before joining the heat exchanger 1 in a state of low pressure and low temperature, through which it passes through the second fluid circulation channels 20.
  • the heat exchanger 1 In this configuration, in which it is crossed by the same fluid in different states, the heat exchanger 1 is referred to as the internal heat exchanger.
  • the low pressure refrigerant exchanges heat with the high pressure fluid from the gas cooler.
  • the fluid At the outlet of the heat exchanger 1, the fluid again wins the compressor 80 and so on.
  • the figure 9 is a sectional view of a heat exchanger according to the invention in another embodiment.
  • the heat exchanger has a single second rib 8 housing all of the second fluid flow channels and interlocking in a single first rib 14 of the first body member 2.
  • the body member 2 comprises two first ribs 6 each housing several of the first fluid circulation channels 18 and interlocking in two second grooves 16 of the second body member 4.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Cookers (AREA)

Abstract

The invention relates to a heat exchanger comprising a body containing a series of first (18) and a series of second (20) fluid flow channels. The body is equipped with: a first slotted element (2) comprising at least a first groove (14) and at least a first rib (6), each first rib (6) housing at least one of the first fluid flow channels (18); and a second slotted element (4) comprising at least a second rib (8) and at least a second groove (16), each second rib (8) housing at least one of the second fluid flow channels (20). According to the invention, the first (2) and second (4) body elements engage such that each first rib (6) and each second groove (8) are housed in a second groove (16) and a first groove (14) respectively.

Description

L'invention se rapporte au domaine des échangeurs de chaleur, par exemple pour un circuit de climatisation d'un véhicule automobile.The invention relates to the field of heat exchangers, for example for an air conditioning circuit of a motor vehicle.

Elle concerne plus particulièrement un échangeur de chaleur comprenant un corps dans lequel sont ménagés une série de premiers canaux de circulation de fluide et une série de deuxièmes canaux de circulation de fluide intercalés.More particularly, it relates to a heat exchanger comprising a body in which are formed a series of first fluid circulation channels and a series of second interchanged fluid circulation channels.

Un tel échangeur de chaleur est connu par exemple du document JP 2003-121086 , lequel décrit l'utilisation d'un profilé extrudé en tant que corps, dans lequel sont ménagés des premiers et deuxièmes canaux de circulation de fluide. Il est nécessaire de relier les premiers et deuxièmes canaux de circulation de fluide à des boîtes collectrices ou collecteurs distincts. Pour ce faire, JP 2003-121086 prévoit que le profilé traverse transversalement un premier puis un second collecteur, tous deux de forme cylindrique. Une première découpe de la paroi du profilé au niveau du premier collecteur cylindrique met en contact l'intérieur du collecteur cylindrique et les premiers canaux de circulation de fluide. Une seconde découpe réalisée au niveau du deuxième collecteur cylindrique met en communication l'intérieur du second collecteur cylindrique et les deuxièmes canaux de circulation de fluide. Bien que la réalisation du corps de l'échangeur de chaleur sous forme d'un profilé extrudé lui confère une bonne résistance mécanique à la pression, la liaison des canaux de circulation de fluide aux collecteurs est délicate à mettre en oeuvre et rend particulièrement complexe l'assemblage d'un tel échangeur de chaleur.Such a heat exchanger is known for example from the document JP 2003-121086 which describes the use of an extruded profile as a body in which first and second fluid circulation channels are provided. It is necessary to connect the first and second fluid circulation channels to separate manifolds or manifolds. To do this, JP 2003-121086 provides that the section transversely traverses a first and a second collector, both cylindrical. A first cut of the profile wall at the first cylindrical collector contacts the inside of the cylindrical collector and the first fluid circulation channels. A second cut made at the second cylindrical collector communicates the interior of the second cylindrical collector and the second fluid circulation channels. Although the production of the body of the heat exchanger in the form of an extruded profile gives it good mechanical resistance to pressure, the connection of the fluid circulation channels to the collectors is difficult to implement and makes it particularly difficult to use. assembly of such a heat exchanger.

Un tel échangeur est également connu du document JP 2004 150673 A . Le document JP 2003-279 27.6 décrit un échangeur de chaleur dont le corps est réalisé sous la forme d'une pièce monobloc dans laquelle sont ménagés une série de canaux de circulation de fluide alignés. Aux extrémités de la pièce monobloc sont ensuite réalisées des séries de découpes destinées à réaliser des séries de dents lesquelles sont traversées par les canaux de circulation de fluide. Pour chaque extrémité de la pièce monobloc, les dents de la série de dents sont alternativement pliées d'un côté et de l'autre d'un plan contenant l'essentiel de la pièce monobloc, définissant une série de premières dents et une série de secondes dents. Les dents sont ensuite reçues dans des boîtes collectrices cylindriques ou collecteurs distincts, lesquelles peuvent être connectées au reste du circuit de climatisation.Such an exchanger is also known from the document JP 2004 150673 A . The document JP 2003-279 27.6 discloses a heat exchanger whose body is in the form of a single piece in which are formed a series of channels of circulation of fluid aligned. At the ends of the one-piece piece are then produced series of cuts for making series of teeth which are traversed by the fluid circulation channels. For each end of the one-piece piece, the teeth of the series of teeth are alternately folded on one side and the other of a plane containing the bulk of the one-piece piece, defining a series of first teeth and a series of second teeth. The teeth are then received in separate cylindrical or collecting manifolds, which can be connected to the rest of the air conditioning circuit.

Un tel échangeur de chaleur est délicat à réaliser, en particulier à cause de l'opération de découpe et de pliage des dents.Such a heat exchanger is difficult to achieve, in particular because of the operation of cutting and bending teeth.

L'invention a pour objet notamment, de remédier aux inconvénients précités en proposant un échangeur de chaleur du type mentionné ci-dessus, dans lequel le corps comprend un premier élément de corps à profil crénelé comportant au moins une première rainure et au moins une première nervure, chaque première nervure logeant au moins l'un des premiers canaux de circulation de fluide, et un deuxième élément de corps à profil crénelé comportant au moins une deuxième nervure et au moins une deuxième rainure, chaque deuxième nervure logeant au moins l'un des deuxièmes canaux de circulation de fluide, les premier et deuxième éléments de corps s'imbriquant en sorte que chaque première nervure et chaque deuxième nervure soient reçues respectivement dans une deuxième rainure et une première rainure.The object of the invention is in particular to overcome the aforementioned drawbacks by proposing a heat exchanger of the type mentioned above, in which the body comprises a first crenellated profile body element comprising at least a first groove and at least a first groove. rib, each first rib housing at least one of the first fluid flow channels, and a second crenellated body member having at least one second rib and at least one second groove, each second rib housing at least one second fluid flow channels, the first and second body members interlocking so that each first rib and each second rib are received respectively in a second groove and a first groove.

Dans un mode de réalisation préféré, le profil du premier élément de corps comporte une pluralité de premières rainures alternant avec une pluralité de premières nervures et le profil du deuxième élément de corps comporte une pluralité de deuxièmes nervures alternant avec une pluralité de deuxièmes rainures.In a preferred embodiment, the profile of the first body member includes a plurality of first grooves alternating with a plurality of first ribs and the profile of the second body member includes a plurality of second ribs alternating with a plurality of second grooves.

Avantageusement, chaque première nervure loge l'un des premiers canaux de circulation de fluide, et chaque deuxième nervure loge l'un des deuxièmes canaux de circulation de fluide, en sorte que les premiers et les deuxièmes canaux sont intercalés. Cette configuration permet d'obtenir de bonnes performances d'échange de chaleur.Advantageously, each first rib houses one of the first fluid circulation channels, and each second rib houses one of the second fluid circulation channels, so that the first and second channels are interposed. This configuration provides good heat exchange performance.

De préférence, chaque première rainure et chaque deuxième nervure sont de formes conjuguées en sorte que chaque première rainure loge entièrement une deuxième nervure, et chaque deuxième rainure et chaque première nervure sont de formes conjuguées en sorte que chaque deuxième rainure loge entièrement une première nervure. Finalement, cette configuration améliore l'échange de chaleur entre le fluide parcourant les canaux logés dans la ou les premières nervures et le fluide parcourant les canaux logés dans la ou les deuxièmes nervures. Cette coopération de forme améliore aussi la tenue à la pression des éléments de corps assemblés, car chaque nervure d'un élément de corps contribue à supporter l'effort résultant de la déformation de la nervure adjacente de l'autre élément de corps. De même, les pressions exercées par les fluides parcourant deux nervures adjacentes d'éléments de corps différents, tendent à se compenser par l'intermédiaire de cette coopération de forme.Preferably, each first groove and each second rib are of conjugate shapes so that each first groove completely houses a second rib, and each second groove and each first rib are of conjugate shapes so that each second groove completely houses a first rib. Finally, this configuration improves the heat exchange between the fluid flowing through the channels housed in the first rib or ribs and the fluid flowing through the channels housed in the second rib or ribs. This form cooperation also improves the pressure resistance of the assembled body members, since each rib of one body member contributes to supporting the force resulting from the deformation of the adjacent rib of the other body member. Similarly, the pressures exerted by the fluids traversing two adjacent ribs of different body elements, tend to compensate for themselves through this form cooperation.

Dans un mode de réalisation préféré de l'invention, le premier élément de corps comprend une première face de jonction et le deuxième élément de corps comprend une deuxième face de jonction, chaque première et chaque deuxième nervure faisant saillie respectivement des première et deuxième faces de jonction en sorte que chaque première et chaque deuxième nervure définit conjointement aux première et deuxième faces de jonction respectivement une première et une deuxième rainure. Cette configuration est facile à mettre en oeuvre car seules la ou les nervures faisant saillie des faces de jonction sont à réaliser. De plus, cette configuration rend plus aisée l'imbrication des éléments de corps.In a preferred embodiment of the invention, the first body member comprises a first junction face and the second body member comprises a second junction face, each first and second rib respectively projecting from the first and second faces of the junction face. junction so that each first and second rib jointly defines the first and second junction faces respectively a first and a second groove. This configuration is easy to implement because only the rib or ribs projecting from the joining faces are to be realized. In addition, this configuration makes it easier to nest body elements.

Comme variante de réalisation de l'invention, le deuxième élément de corps comprend en outre une troisième face de jonction de laquelle fait saillie au moins une troisième nervure définissant au moins une troisième rainure, chaque troisième nervure logeant au moins l'un de troisièmes canaux de circulation de fluide.As an alternative embodiment of the invention, the second body member further comprises a third junction face of which projects at least one third rib defining at least one third groove, each third rib housing at least one of the third channels of fluid circulation.

L'échangeur comprend alors en outre un troisième élément de corps à profil crénelé comportant une quatrième face de jonction de laquelle fait saillie au moins une quatrième nervure et au moins une quatrième rainure, chaque quatrième nervure logeant au moins l'un de quatrièmes canaux de circulation de fluide, les deuxième et troisième éléments de corps s'imbriquant en sorte que chaque troisième nervure et chaque quatrième nervure soient reçues respectivement dans une quatrième et une troisième rainure.The exchanger then further comprises a third crenellated profile body element comprising a fourth junction face from which at least one fourth rib and at least one fourth groove protrude, each fourth rib housing at least one of the fourth channels of fluid flow, the second and third body members interlocking so that each third rib and each fourth rib are received respectively in a fourth and a third groove.

Dans ce cas, on prévoit que les deuxième et troisième faces de jonction du deuxième élément de corps sont opposées, en ce que chaque deuxième nervure est en regard d'une troisième rainure et en ce que chaque troisième nervure est en regard d'une deuxième rainure , ce qui permet de réduire la matière utilisée dans la construction de l'échangeur de chaleur et en particulier la matière présente entre les canaux de circulation de fluide, laquelle nuit à l'échange de chaleur.In this case, it is expected that the second and third junction faces of the second body member are opposed, in that each second rib is facing a third groove and in that each third rib is opposite a second groove, which reduces the material used in the construction of the heat exchanger and in particular the material present between the fluid circulation channels, which impairs the heat exchange.

Avantageusement, l'un au moins des éléments de corps présente une face libre opposée à une face de jonction, ladite face libre présentant au moins une rainure supplémentaire en regard d'une nervure de la face de jonction. Cette rainure supplémentaire permet "d'enlever" de la matière et rend ainsi la fabrication de l'échangeur de chaleur moins coûteuse en matière première. L'échangeur de chaleur est également moins lourd et cet enlèvement de matière empêche un emmagasinage de chaleur inutile au niveau de la face libre.Advantageously, at least one of the body members has a free face opposite a junction face, said free face having at least one additional groove facing a rib of the junction face. This additional groove allows "removal" of the material and thus makes the manufacture of the heat exchanger less expensive raw material. The heat exchanger is also lighter and this removal of material prevents unnecessary heat storage at the free face.

Préférentiellement, chaque nervure de chaque face de jonction se prolonge de part et d'autre de ladite face de jonction de manière à former à chaque fois une première et une seconde dent. L'échangeur de chaleur comprend alors des premiers et seconds collecteurs de fluide adjoints à chaque élément de corps, les premiers et seconds collecteurs étant munis chacun de trous de forme adaptée pour loger au moins en partie lesdites dents de manière que les canaux de circulation de fluide débouchent chacun dans un premier et un second collecteur. Ceci constitue un moyen simple de relier les canaux de circulation de fluide aux collecteurs, lesquels sont ensuite reliés au reste de circuit de climatisation, par exemple.Preferably, each rib of each junction face extends on either side of said junction face so as to form in each case a first and a second tooth. The heat exchanger then comprises first and second fluid collectors attached to each body element, the first and second collectors being each provided with holes of a shape adapted to accommodate at least part of said teeth so that the circulation channels of the fluid flow each into a first and a second collector. This is a simple way of connecting the fluid circulation channels to the collectors, which are then connected to the rest of the air conditioning circuit, for example.

Avantageusement, chaque première nervure dudit premier élément de corps présente des parties coudées reliant chacune une dent à une partie centrale de la première nervure de manière que lesdites première et seconde dents soient disposées respectivement dans des plans inclinés par rapport à ladite première face de jonction, ce qui permet de décaler les collecteurs du plan dans lequel se situe le corps de l'échangeur de chaleur afin de gagner en encombrement et de ne pas gêner l'appui du deuxième élément de corps venant s'imbriquer avec le premier élément de corps.Advantageously, each first rib of said first body member has bent portions each connecting a tooth to a central portion of the first rib so that said first and second teeth are respectively disposed in planes inclined with respect to said first junction face, this allows to shift the collectors of the plane in which the body of the heat exchanger is located in order to gain space and not to interfere with the support of the second body member coming into interlocking with the first body member.

Pour les mêmes raisons, dans le mode de réalisation préféré, chaque deuxième nervure dudit deuxième élément de corps présente une partie coudée reliant une première et une seconde dents à une partie centrale de ladite deuxième nervure de manière que chaque dent soit disposée dans un plan incliné par rapport à ladite deuxième face de jonction.For the same reasons, in the preferred embodiment, each second rib of said second body member has a bent portion connecting a first and second teeth to a central portion of said second rib so that each tooth is disposed in an inclined plane. relative to said second junction face.

Dans ladite variante de réalisation de l'invention, il est intéressant de faire en sorte que chaque quatrième nervure dudit troisième élément de corps présente une partie coudée reliant une première et une seconde dent à une partie centrale des ladite quatrième nervure de manière que chaque dent soit disposée dans un plan incliné par rapport à ladite quatrième face de jonction. Dans ce cas, il reste suffisamment d'espace pour loger des collecteurs adjoints au deuxième élément de corps.In said embodiment of the invention, it is advantageous to ensure that each fourth rib of said third body member has a bent portion connecting a first and a second tooth to a central portion of said fourth rib so that each tooth is disposed in a plane inclined relative to said fourth junction face. In this case, there is enough space to accommodate adjunct collectors at the second body member.

Il est alors possible de faire en sorte que chaque première et chaque seconde dent des deuxième et troisième faces de jonction sont reçues respectivement dans un même premier collecteur d'une part et dans un même second collecteur d'autre part.
Dans tous les modes de réalisation ci-dessus, il est préférable que les premiers canaux de circulation de fluide et les seconds canaux de circulation de fluide soient ménagés dans la première et la seconde rainure respectivement de manière que les premiers canaux de circulation de fluide et les seconds canaux de circulation de fluide soient alignés. Ceci permet de réduire l'écart entre les canaux de circulation de fluide pour améliorer l'échange thermique.It is then possible to ensure that each first and second tooth of the second and third junction faces are respectively received in the same first collector on the one hand and in the same second collector on the other hand.
In all of the above embodiments, it is preferable that the first fluid flow channels and the second fluid flow channels are formed in the first and second grooves respectively so that the first fluid flow channels and the second circulation channels of fluid are aligned. This makes it possible to reduce the gap between the fluid circulation channels in order to improve the heat exchange.

De préférence, chaque élément de corps est formé en tant que pièce profilée et monobloc, obtenu, par exemple, par extrusion, ce qui constitue une mise en oeuvre simple de l'invention. En outre, la réalisation des éléments de corps en tant que pièces monoblocs offre la meilleure résistance à la pression possible. L'extrusion permet de réaliser aisément les canaux de circulation de fluide.Preferably, each body member is formed as a profiled and integral piece, obtained, for example, by extrusion, which constitutes a simple implementation of the invention. In addition, the realization of the body members as one-piece pieces provides the best resistance to pressure possible. Extrusion makes it easy to make the fluid circulation channels.

Avantageusement, chaque première nervure et chaque seconde rainure sont de dimensions choisies conjointement selon un ajustement serré. Ceci permet d'emmancher les éléments de corps en force et ainsi de se passer d'une opération de brasure ou de soudure. Dans une opération de brasure, le métal d'apport est susceptible d'affaiblir la tenue à la corrosion du corps et de réduire sa résistance mécanique à la pression exercée par les fluides. Dans les cas de la brasure comme de la soudure, l'échauffement puis le refroidissement des éléments du corps induisent une modification de leur structure métallographique ; ces modifications sont susceptibles de réduire la tenue à la pression du corps d'échangeur.Advantageously, each first rib and each second groove are of jointly selected dimensions in a tight fit. This makes it possible to grip the body elements in force and thus to do without a brazing or soldering operation. In a brazing operation, the filler metal is capable of weakening the corrosion resistance of the body and reducing its mechanical resistance to the pressure exerted by the fluids. In the case of brazing as weld, the heating and cooling of the body elements induce a change in their metallographic structure; these modifications are likely to reduce the resistance to pressure of the exchanger body.

Les nervures de l'un au moins des éléments de corps peuvent présenter une section trapézoïdale ou carrée.The ribs of at least one of the body members may have a trapezoidal or square section.

De préférence, chaque première nervure, chaque seconde rainure, chaque première rainure et les secondes nervures sont de section identique en sorte que les premier et second éléments de corps sont de forme identique. Ainsi, on réalise les éléments de corps en tant que pièces identiques que l'on apparie ensuite. Ceci permet de réduire les coûts et facilite la fabrication de l'échangeur de chaleur.Preferably, each first rib, each second groove, each first groove and the second ribs are of identical section so that the first and second body members are of identical shape. Thus, the body elements are made as identical pieces which are then matched. This reduces costs and facilitates the manufacture of the heat exchanger.

Avantageusement, les éléments de corps dont chaque nervure présente des portions coudées sont cintrés au voisinage de leurs extrémités de manière à former lesdites portions coudées, ce qui permet de couder l'ensemble des nervures dans une même opération de fabrication.Advantageously, the body elements of which each rib has bent portions are bent in the vicinity of their ends to form said bent portions, which allows to bend all the ribs in the same manufacturing process.

Dans un mode de réalisation particulièrement avantageux, l'échangeur de chaleur est réalisé sous la forme d'un échangeur de chaleur interne pour un circuit de climatisation.In a particularly advantageous embodiment, the heat exchanger is made in the form of an internal heat exchanger for an air conditioning circuit.

D'autres caractéristiques et avantages de l'invention apparaîtront à l'examen de la description détaillée ci-après, et des dessins annexés sur lesquels :

  • la figure 1 est une vue partielle en perspective d'un échangeur de chaleur selon l'invention dans un mode de réalisation préféré,
  • la figure 2 est une vue partielle en coupe de l'échangeur de la figure 1 selon un plan (X, Z),
  • la figure 3 est une vue partielle en coupe de l'échangeur de chaleur de la figure 1, selon un plan (X, Z) dans une variante de réalisation,
  • la figure 4 est une vue partielle en coupe de l'échangeur de chaleur de la figure 1, selon un plan (X, Z) dans une autre variante de réalisation,
  • la figure 5 est une vue en perspective d'un détail de la figure 1,
  • la figure 6 est une vue partielle en perspective d'un échangeur de chaleur selon l'invention dans un autre mode de réalisation,
  • la figure 7 est une vue en coupe de l'échangeur de chaleur de la figure 6 selon un plan (X, Z), et
  • la figure 8 est un schéma illustrant une mise en oeuvre préférée de l'échangeur de chaleur de la figure 1, dans un circuit de climatisation, et
  • la figure 9 est une vue en coupe d'un échangeur de chaleur selon l'invention dans un autre mode de réalisation.
Other features and advantages of the invention will appear on examining the detailed description below, and the attached drawings in which:
  • the figure 1 is a partial perspective view of a heat exchanger according to the invention in a preferred embodiment,
  • the figure 2 is a partial sectional view of the heat exchanger of the figure 1 according to a plane (X, Z),
  • the figure 3 is a partial sectional view of the heat exchanger of the figure 1 , according to a plane (X, Z) in an embodiment variant,
  • the figure 4 is a partial sectional view of the heat exchanger of the figure 1 , according to a plane (X, Z) in another variant embodiment,
  • the figure 5 is a perspective view of a detail of the figure 1 ,
  • the figure 6 is a partial perspective view of a heat exchanger according to the invention in another embodiment,
  • the figure 7 is a sectional view of the heat exchanger of the figure 6 according to a plane (X, Z), and
  • the figure 8 is a diagram illustrating a preferred implementation of the heat exchanger of the figure 1 , in an air conditioning circuit, and
  • the figure 9 is a sectional view of a heat exchanger according to the invention in another embodiment.

Les dessins annexés pourront non seulement servir à compléter l'invention, mais aussi contribuer à sa définition, le cas échéant.The attached drawings may not only serve to complete the invention, but also contribute to its definition, if any.

La figure 1 illustre un échangeur de chaleur 1 selon l'invention dans un premier mode de réalisation, vu en perspective.The figure 1 illustrates a heat exchanger 1 according to the invention in a first embodiment, seen in perspective.

L'échangeur de chaleur 1 est constitué d'un premier élément de corps 2 et d'un second élément de corps 4, tous deux de forme allongée et d'allure généralement rectangulaire, réalisés sous la forme de profilés métalliques, dont la section est illustrée sur la figure 2, laquelle est une coupe transversale des éléments de corps 2 et 4 assemblés, selon un plan (X, Z).The heat exchanger 1 consists of a first body element 2 and a second body element 4, both of elongated shape and of generally rectangular shape, made in the form of metal sections, the section of which is illustrated on the figure 2 which is a cross-section of the body members 2 and 4 assembled in a plane (X, Z).

Comme le montre la figure 2, les éléments de corps 2 et 4 présentent des profils crénelés composés de premières et deuxièmes nervures longitudinales 6 et 8 respectivement, de section carrée courant tout le long des éléments de corps 2 et 4 respectivement. Les premières 6 et deuxièmes 8 nervures longitudinales font respectivement saillie d'une première 10 et d'une deuxième 12 face de jonction sensiblement rectangulaires et chacune respectivement opposée à une face libre également rectangulaire désignée par les références numériques 9 et 11.As shown in figure 2 , the body members 2 and 4 have crenellated profiles composed of first and second longitudinal ribs 6 and 8 respectively, of square section running along the body members 2 and 4 respectively. The first 6 and second 8 longitudinal ribs respectively protrude from a first 10 and a second 12 substantially rectangular junction face and each respectively opposite to a free face also rectangular designated by the reference numerals 9 and 11.

Les deuxièmes et premières nervures longitudinales délimitent conjointement avec les premières 10 et deuxièmes 12 faces de jonction une série de rainures longitudinales 14 et 16 de section carrée et dont les dimensions sont voisines des dimensions des deuxièmes 8 et premières 6 nervures longitudinales respectivement. Chaque première 14 ou deuxième 16 rainure longitudinale a pour fond la première 10 ou deuxième 12 face de jonction et pour paroi les flancs de premières 6 ou deuxièmes nervures longitudinales respectivement. Les premières 6 et deuxièmes 8 nervures longitudinales sont respectivement traversées par des premiers 18 et deuxièmes 20 canaux de circulation de fluide longitudinaux de section circulaire et destinés respectivement à la circulation d'un premier et d'un second fluide au travers de l'échangeur de chaleur.The second and first longitudinal ribs together with the first 10 and second 12 junction faces define a series of longitudinal grooves 14 and 16 of square section and whose dimensions are similar to the dimensions of the second 8 and first 6 longitudinal ribs respectively. Each first or second longitudinal groove 14 has the first or second junction face 12 as the bottom and the flanks of the first or second longitudinal ribs respectively. The first 6 and second 8 longitudinal ribs are traversed respectively by the first 18 and second longitudinal fluid circulation channels of circular section and intended respectively for the circulation of a first and a second fluid through the heat exchanger.

Il est à noter que les expressions premier fluide et second fluide peuvent désigner un même fluide pris dans des états de température et/ou de pression différents. Par exemple, dans un circuit de climatisation dans lequel circule un gaz comme du dioxyde de carbone CO2, l'expression premier fluide a trait au gaz dans un état de haute pression et de haute température tandis que l'expression second fluide se rapporte à ce même gaz en un point différent du circuit dans un état de basse pression et de basse température.It should be noted that the terms first fluid and second fluid may designate the same fluid taken in different temperature and / or pressure states. For example, in an air conditioning circuit in which a gas such as carbon dioxide CO2 circulates, the term "first fluid" refers to the gas in a state of high pressure and high temperature while the term "second fluid" relates to that gas. same gas at a different point of the circuit in a state of low pressure and low temperature.

Les premières nervures longitudinales 6 sont en contact sur tout leur pourtour avec le pourtour des secondes rainures longitudinales 16 et le pourtour des deuxièmes nervures longitudinales 8 sont en contact avec les pourtours des premières rainures longitudinales 16. Ce faisant, il se produit un échange de chaleur entre les premiers 18 et les deuxièmes 20 canaux de circulation de fluide par l'intermédiaire des premiers 2 et deuxièmes 4 éléments de corps, eux-mêmes mis en contact thermique par l'intermédiaire des rainures et des nervures.The first longitudinal ribs 6 are in contact all around their perimeter with the periphery of the second longitudinal grooves 16 and the periphery of the second longitudinal ribs 8 are in contact with the perimeters of the first longitudinal grooves 16. In so doing, a heat exchange takes place between the first 18 and the second 20 fluid circulation channels via the first 2 and second 4 body members, themselves brought into thermal contact through the grooves and ribs.

La tolérance sur les dimensions des premières 6 et deuxièmes 8 nervures longitudinales ainsi que sur les premières 14 et deuxièmes 16 rainures longitudinales destinées à les recevoir est de préférence choisie de manière à assurer un ajustement serré entre les premier 2 et deuxième 4 éléments de corps. Ce faisant, l'assemblage ou l'imbrication des premier 2 et deuxième 4 éléments de corps peut se faire en force, par exemple au moyen d'une presse, et permet ainsi de se passer d'une soudure, laquelle nuit, en particulier à cause du métal d'apport nécessaire, aux échanges thermiques entre les premier 2 et deuxième 4 éléments de corps.The tolerance on the dimensions of the first 6 and second 8 longitudinal ribs as well as the first 14 and second 16 longitudinal grooves intended to receive them is preferably chosen so as to ensure a tight fit between the first 2 and second 4 body members. In doing so, the assembly or the nesting of the first 2 and second 4 body elements can be done in force, for example by means of a press, and thus makes it possible to do without a weld, which night, in particular because of the necessary filler metal, thermal exchanges between the first 2 and second 4 body elements.

La figure 3 illustre une variante de réalisation de l'échangeur de chaleur de la figure 1, dans laquelle les première 9 et deuxième 11 faces libres des premier 2 et deuxième 4 éléments de corps respectivement présentent des séries de rainures longitudinales supplémentaires respectivement 22 et 24 en regard respectivement des première 6 et deuxième 8 rainures longitudinales et destinées à enlever de la matière afin de réduire les coûts en matière première, de réduire la masse de l'échangeur de chaleur, et surtout d'éviter une inutile perte de chaleur, par les faces libres, en favorisant leur isolation thermique. Cette isolation est favorisée par l'évidement d'une partie de la matière.The figure 3 illustrates an alternative embodiment of the heat exchanger of the figure 1 , in which the first 9 and second 11 free faces of the first 2 and second 4 body members respectively have series of additional longitudinal grooves respectively 22 and 24 respectively opposite the first 6 and second 8 longitudinal grooves and intended to remove material in order to reduce the raw material costs, to reduce the mass of the heat exchanger, and especially to avoid unnecessary heat loss, by the free faces, favoring their thermal insulation. This insulation is favored by the recess of part of the material.

Les premier 2 et deuxième 4 éléments de corps sont courbés ou cintrés à l'une et l'autre de leurs extrémités respectives selon un angle voisin de 90°. Comme les premières 6 et deuxièmes 8 nervures longitudinales sont en appui sur les premières 14 et deuxième 16 faces de jonction, le pliage des premier 2 et deuxième 4 éléments de corps impriment aux premières 6 et deuxièmes 8 nervures longitudinales des portions coudées de part et d'autre d'une portion sensiblement plane. Les portions coudées des premières nervures longitudinales 6 du premier élément de corps 2 sont désignées par les références numériques 26 et 28, tandis que les portions coudées des deuxièmes nervures longitudinales 8 du deuxième élément de corps 4 sont respectivement désignées par les références numériques 30 et 32.The first 2 and second 4 body members are bent or bent at either of their respective ends at an angle of about 90 °. As the first 6 and second 8 longitudinal ribs bear on the first 14 and second 16 junction faces, the folding of the first 2 and second 4 body elements print to the first 6 and second 8 longitudinal ribs portions of the bent portions of the another of a substantially flat portion. The bent portions of the first longitudinal ribs 6 of the first body member 2 are designated by the numerical references 26 and 28, while the bent portions of the second longitudinal ribs 8 of the second body member 4 are respectively designated by the numerals 30 and 32. .

Les premières nervures longitudinales 6 se prolongent de part et d'autre de la première face de jonction 14, dans la continuité des parties coudées 26 et 28, par des premières séries de dents 34, lesquelles sont de section identique aux premières nervures longitudinales 6. Les premières séries de dents 34 sont traversées par les premiers canaux de circulation de fluide 18. De part les portions coudées 26 et 28, les premières séries de dents 34 sont disposées dans des plans inclinés à sensiblement 90° de la première face de jonction 14.The first longitudinal ribs 6 extend on either side of the first junction face 14, in the continuity of the bent portions 26 and 28, by first series of teeth 34, which are of identical section to the first longitudinal ribs 6. The first series of teeth 34 are traversed by the first fluid circulation channels 18. From the bent portions 26 and 28, the first series of teeth 34 are disposed in planes inclined at substantially 90 ° to the first junction face 14 .

De même, les deuxièmes nervures longitudinales 8 du deuxième élément de corps 4 se prolongent de part et d'autre de la deuxième face de jonction 16 par des secondes séries de dents 36 dont la section est identique à la section des secondes nervures longitudinales 8 et qui sont traversées par les seconds canaux de circulation de fluide 20.Similarly, the second longitudinal ribs 8 of the second body member 4 extend on either side of the second junction face 16 by second series of teeth 36 whose section is identical to the section of the second longitudinal ribs 8 and which are traversed by the second fluid circulation channels 20.

On note que les portions coudées 26, 28, 30 et 32 écartent les séries de dents 34 et 36 des faces de jonction 14 et 16 à l'opposé de l'autre élément de corps 2 ou 4.It is noted that the bent portions 26, 28, 30 and 32 separate the series of teeth 34 and 36 from the junction faces 14 and 16 opposite the other body element 2 or 4.

Chaque série de dents 34 et 36 est reçue dans des collecteurs de fluide 40 cylindriques et constitués de deux coques demi-cylindriques 42 et 44 assemblées l'une à l'autre. Pour chaque collecteur de fluide 40, l'une des demi-coques demi-cylindriques 44 présente une succession de trous 46 de section identique à la section des premières 34 et secondes 36 séries 46 de dents. Chaque collecteur de fluide 40 reçoit ainsi les premières 34 ou secondes 36 séries de dents, de manière que les premiers 18 ou seconds 20 canaux de circulation de fluide débouchent à l'intérieur des collecteurs de fluide 40. La jonction entre les collecteurs de fluide 40 et le reste d'un circuit hydraulique est prévue par l'intermédiaire d'un système d'écrous 48 adapté pour la connexion d'un flexible de circulation de fluide et bien connu de l'homme du métier.Each series of teeth 34 and 36 is received in cylindrical fluid manifolds 40 and consist of two semi-cylindrical shells 42 and 44 assembled to one another. For each fluid manifold 40, one of the half-cylindrical half-shells 44 has a succession of holes 46 of identical section to the section of the first 34 and second 36 series 46 teeth. Each fluid manifold 40 thus receives the first 34 or second 36 series of teeth, so that the first 18 or second 20 fluid circulation channels open into the fluid manifolds 40. The junction between the fluid manifolds 40 and the remainder of a hydraulic circuit is provided via a nut system 48 adapted for connection of a fluid circulation hose and well known to those skilled in the art.

Avantageusement, les premiers 2 et deuxièmes 4 éléments de corps sont réalisés en tant que pièces monoblocs profilées obtenues par extrusion. La courbure des premiers 2 et deuxièmes 4 éléments de corps est obtenue par une opération de cintrage ultérieure.
Bien qu'il ait été décrit ici, des premières 6 et deuxièmes 8 nervures longitudinales de section carrée, d'autres formes sont envisageables, comme l'illustre la figure 4, laquelle présente des rainures longitudinales 6 et 8 de section trapézoïdale, dont la grande base est en appui sur les première 10 et deuxième 12 faces de jonction. De même, les premiers 18 et deuxième 20 canaux de circulation de fluide ont été décrits ici de section et de dimension identique, mais il est envisageable de prévoir des canaux de forme différente et/ou de dimension différente.Advantageously, the first 2 and second 4 body members are made as profiled monobloc pieces obtained by extrusion. The curvature of the first 2 and second 4 body members is achieved by a subsequent bending operation.
Although it has been described here, first 6 and second 8 longitudinal ribs square section, other forms are possible, as illustrated by the figure 4 , which has longitudinal grooves 6 and 8 of trapezoidal section, the large base is supported on the first 10 and second 12 junction faces. Similarly, the first 18 and second 20 fluid circulation channels have been described here in section and in identical dimension, but it is conceivable to provide channels of different shape and / or different size.

Un tel échangeur de chaleur 1 est particulièrement adapté pour l'échange de chaleur entre des fluides à très haute pression. En effet, les pièces monoblocs sont particulièrement adaptées pour résister à de fortes pressions. En outre, dans la disposition illustrée ici, la pression présente à l'intérieur des premier et deuxième canaux de circulation de fluide, tend à maintenir ensemble les premier 2 et deuxième 4 éléments de corps.Such a heat exchanger 1 is particularly suitable for exchanging heat between fluids at very high pressure. Indeed, monobloc parts are particularly adapted to withstand high pressures. In addition, in the arrangement illustrated herein, the pressure within the first and second fluid flow channels tends to hold together the first 2 and second 4 body members.

La figure 6 est une vue en perspective et partielle d'un échangeur de chaleur 50 selon l'invention dans une variante de réalisation, destinée à permettre un échange de chaleur entre trois fluides en circulation à l'intérieur de l'échangeur de chaleur 50. La figure 6 est à considérer conjointement à la figure 7, laquelle est une coupe transversale de l'échangeur de chaleur 50 de la figure 6.The figure 6 is a perspective and partial view of a heat exchanger 50 according to the invention in an alternative embodiment, intended to allow a heat exchange between three fluids in circulation inside the heat exchanger 50. figure 6 is to be considered together with the figure 7 which is a cross-section of the heat exchanger 50 of the figure 6 .

Dans l'échangeur de chaleur 50 de la figure 6, a été intercalé entre les premier 2 et deuxième 4 éléments de corps, un élément de corps intermédiaire 51, lequel se présente sous la forme d'une pièce profilée allongée de profil crénelé. L'élément de corps intermédiaire 51 présente une troisième face de jonction 52 et une quatrième face de jonction 54 opposée en vis-à-vis et identiques desquelles font saillie respectivement des troisièmes 56 et quatrièmes 58 nervures longitudinales de section carrée et de forme semblable aux nervures longitudinales décrites plus haut. Les troisièmes et quatrièmes 58 nervures longitudinales délimitent une série de rainures longitudinales 60 et 62 conjointement au troisième 52 et quatrième 54 faces de jonction.In the heat exchanger 50 of the figure 6 has been interposed between the first 2 and second 4 body members, an intermediate body member 51, which is in the form of an elongated profiled profile member castellated. The intermediate body element 51 has a third junction face 52 and a fourth opposing junction face 54 facing each other and which are projecting respectively from the third 56 and fourth 58 longitudinal ribs of square section and of similar shape to the longitudinal ribs described above. The third and fourth longitudinal ribs 58 define a series of longitudinal grooves 60 and 62 together with the third 52 and fourth 54 junction faces.

Les troisièmes et quatrièmes rainures longitudinales 60 et 62 logent exactement les premières 6 et secondes 8 rainures longitudinales des premier 2 et deuxième 4 éléments de corps comme décrit plus haut. Les troisièmes 56 et quatrièmes 58 nervures longitudinales sont traversées par des troisièmes 64 et quatrièmes 66 canaux de circulation de fluide, de section circulaire et identique. Une fois imbriqués, le premier élément de corps 2 et l'élément de corps intermédiaire 51 d'une part et le deuxième élément de corps 4 et l'élément de corps intermédiaire 51 d'autre part, les premiers 18 et troisièmes 64 canaux de circulation de fluide sont intercalés et alignés, de même que les quatrièmes 66 et deuxièmes 20 canaux de circulation de fluide.The third and fourth longitudinal grooves 60 and 62 fit exactly the first 6 and second 8 longitudinal grooves of the first 2 and second 4 body members as described above. The third 56 and fourth 58 longitudinal ribs are traversed by third 64 and fourth 66 fluid circulation channels, of circular section and identical. Once nested, the first body member 2 and the intermediate body member 51 on the one hand and the second body member 4 and the intermediate body member 51 on the other hand, the first 18 and third 64 channels of Fluid flow is interspersed and aligned, as are the fourth and second fluid flow channels 66 and 66.

A la différence des premier 2 et deuxième 4 éléments de corps, l'élément de corps intermédiaire 51 n'est pas cintré à ses extrémités. Les troisièmes 56 et quatrièmes 58 nervures longitudinales se prolongent de part et d'autre des troisième 52 quatrième 54 faces de jonction en des troisièmes et quatrièmes séries de dents de section identique aux nervures non représentées. Les troisièmes et quatrièmes séries de dents sont disposées selon des plans identiques au plan contenant l'essentiel de l'élément de corps intermédiaire 51. Les troisièmes et quatrièmes séries de dents sont reçues dans des collecteurs de fluide 40 du type décrit ci-dessus. Le cintrage des premier 2 et deuxième 4 éléments de corps permet de ménager suffisamment d'espace pour disposer les collecteurs de fluide 40 adjoints à l'élément de corps intermédiaire 51. Ainsi, l'encombrement global de l'échangeur de chaleur de la figure 6 est réduit. Bien entendu, il a été décrit ici des troisièmes 56 et quatrièmes 58 nervures longitudinales de section carrée, mais d'autres formes sont envisageables par exemple des sections de forme trapézoïdale.Unlike the first 2 and second 4 body members, the intermediate body member 51 is not bent at its ends. The third 56 and fourth 58 longitudinal ribs extend on either side of the third 52 fourth 54 junction faces into third and fourth sets of teeth of identical section to unrepresented ribs. The third and fourth sets of teeth are arranged in planes identical to the plane containing most of the intermediate body element 51. The third and fourth sets of teeth are received in fluid manifolds 40 of the type described above. The bending of the first 2 and second 4 body members allows to provide sufficient space for disposing the fluid collectors 40 to the intermediate body member 51. Thus, the overall size of the heat exchanger of the figure 6 is reduced. Of course, there have been described here third 56 and fourth 58 longitudinal ribs of square section, but other forms are possible for example trapezoidal sections.

L'échangeur objet de l'invention peut comporter plusieurs éléments de corps intermédiaires 51 empilés et imbriqués les uns dans les autres. Cela, afin d'augmenter la capacité d'échange de chaleur du corps pour un encombrement donné selon la direction Y. Dans ce cas, les éléments de corps intermédiaires 51 seraient cintrés à leurs extrémités, de façon à loger les collecteurs correspondants.The exchanger object of the invention may comprise several elements of intermediate bodies 51 stacked and nested within each other. This, in order to increase the heat exchange capacity of the body for a given space in the direction Y. In this case, the intermediate body members 51 would be bent at their ends, so as to accommodate the corresponding collectors.

De préférence, les éléments de corps sont réalisés en alliage d'aluminium, mais d'autres matériaux sont envisageables.Preferably, the body members are made of aluminum alloy, but other materials are possible.

La figure 8 illustre un circuit de climatisation, par exemple pour un véhicule automobile, dans lequel est intégré l'échangeur de chaleur 1 de la figure 1. Le circuit de climatisation de la figure 8 comprend pour l'essentiel un compresseur 80. Un fluide réfrigérant, par exemple du dioxyde de carbone CO2, envoyé par le compresseur 80 traverse ensuite un refroidisseur de gaz 82, duquel il ressort dans un étant de haute pression et de haute température. À la sortie du refroidisseur de gaz 82, le fluide traverse l'échangeur interne 1 en empruntant les premier canaux de circulation de fluide 18 puis est détendu dans un détendeur 84. Le fluide ainsi détendu est ensuite acheminé vers un évaporateur 86 puis vers un accumulateur 88, avant de rejoindre l'échangeur de chaleur 1 dans un état de basse pression et de basse température, qu'il traverse en empruntant les seconds canaux de circulation de fluide 20. Dans cette configuration, dans laquelle il est traversé par un même fluide dans des états différents, l'échangeur de chaleur 1 est désigné par le terme d'échangeur interne. Dans cet échangeur interne, le fluide réfrigérant à basse pression échange de la chaleur avec le fluide à haute pression provenant du refroidisseur de gaz. À la sortie de l'échangeur de chaleur de chaleur 1, le fluide gagne à nouveau le compresseur 80 et ainsi de suite.The figure 8 illustrates an air conditioning circuit, for example for a motor vehicle, in which is integrated the heat exchanger 1 of the figure 1 . The air conditioning circuit of the figure 8 essentially comprises a compressor 80. A refrigerant, for example carbon dioxide CO2, sent by the compressor 80 then passes through a gas cooler 82, from which it emerges in a high pressure and high temperature. At the outlet of the gas cooler 82, the fluid passes through the internal heat exchanger 1 by passing through the first fluid circulation channel 18 and is then expanded in a pressure reducer 84. The fluid thus expanded is then conveyed to an evaporator 86 and then to an accumulator 88, before joining the heat exchanger 1 in a state of low pressure and low temperature, through which it passes through the second fluid circulation channels 20. In this configuration, in which it is crossed by the same fluid in different states, the heat exchanger 1 is referred to as the internal heat exchanger. In this internal exchanger, the low pressure refrigerant exchanges heat with the high pressure fluid from the gas cooler. At the outlet of the heat exchanger 1, the fluid again wins the compressor 80 and so on.

La figure 9 est une vue en coupe d'un échangeur de chaleur selon l'invention dans un autre mode de réalisation. Dans ce mode de réalisation, l'échangeur de chaleur comporte une seule seconde nervure 8 logeant l'ensemble des seconds canaux de circulation de fluide et s'imbriquant dans une unique première nervure 14 du premier élément de corps 2. L'élément de corps 2 comporte deux premières nervures 6 logeant chacune plusieurs des premiers canaux de circulation de fluide 18 et s'imbriquant dans deux secondes rainures 16 du second élément de corps 4.The figure 9 is a sectional view of a heat exchanger according to the invention in another embodiment. In this embodiment, the heat exchanger has a single second rib 8 housing all of the second fluid flow channels and interlocking in a single first rib 14 of the first body member 2. The body member 2 comprises two first ribs 6 each housing several of the first fluid circulation channels 18 and interlocking in two second grooves 16 of the second body member 4.

L'invention ne se limite pas aux modes de réalisation décrits ci-avant, seulement à titre d'exemple, mais elle englobe toutes les variantes que pourra envisager l'homme de l'art dans le cadre des revendications ci-après.The invention is not limited to the embodiments described above, only by way of example, but encompasses all the variants that may be considered by those skilled in the art within the scope of the claims below.

Claims (22)

  1. Heat exchanger (1, 50) comprising a body in which are fitted a series of first (18) ducts for the circulation of fluid and a series of second (20) ducts for the circulation of fluid, characterised in that the body comprises a first element body (2) with a serrated profile featuring at least one first groove (14) and at least one first rib (6), wherein each first rib (6) houses at least one of the first fluid circulation ducts (18), and a second body element (4) with a serrated profile featuring at least one second rib (8) and at least one second groove (16), wherein each second rib (8) houses at least one of the first second circulation ducts (20),wherein the first (2) and second (4) body elements are interwoven such that each first rib (6) and each second rub (8) are respectively fitted into a second groove (16) and a first groove (14).
  2. Heat exchanger according to claim 1, characterised in that the profile of the first body element (2) comprises a plurality of first ribs (14) alternating with a plurality of first grooves (6) and in that the profile of the second body element (4) features a plurality of second ribs (8) alternating with a plurality of second grooves (16).
  3. Heat exchanger according to claim 1 or 2,
    characterised in that each first rib (6) houses one of the first fluid circulation ducts (18), and that each second rib (8) houses one of the second fluid circulation ducts (20), such that the first (18) and second (20) ducts are interwoven.
  4. Heat exchanger according to any of the previous claims,
    characterised in that each first groove (14) and each second rib (8) have conjugated forms such that each first groove (14) houses entirely a second rib (8) and in that each second groove (16) and each first rib (6) have conjugated forms such that each second groove (16) houses entirely a first rib (6).
  5. Heat exchanger according to any of the previous claims,
    characterised in that the first body element (2) comprises a first junction face (10) and in that the second body element (4) comprises a second junction face (12), wherein each first (6) and second (8) rib respectively protrudes the first (10) and second (12) junction faces such that each first (6) and second (8) rib jointly define on the first (10) and second (12) junction faces respectively a first (14) and a second (16) groove.
  6. Heat exchanger according to claim 5, characterised in that the second body element (51) further comprises a third (54) junction face from which protrudes at least one third rib (58) which defines at least one third groove (62) , wherein each third rib (62) houses at least one of the third (66) fluid circulation ducts, and in that it further comprises a third body element (4) with a serrated profile featuring a fourth junction face (12) from which protrudes at least one fourth rib (16) and at least one fourth groove (8), wherein each fourth rib (8) houses at least one of the fourth fluid circulation ducts (20), wherein the second (51) and the third (4) body elements are interwoven such that each third (58) rib and each fourth (8) rib are respectively fitted into a fourth (16) and a third (62) groove.
  7. Heat exchanger according to claim 6, characterised in that the second (52) and third (54) junction faces of the second (51) body element are opposite one another, in that each second rib (56) is opposite a third groove (62) and in that each third rib (58) is opposite a second groove (60).
  8. Heat exchanger according to any of claims 4 to 7,
    characterised in that at least one of the body elements (2; 4) has a free face (9; 11) opposite a junction face (10; 12), wherein said free face (9; 11) has at least one additional groove (24) opposite a rib (6; 8) of the junction face (10; 12).
  9. Heat exchanger according to any of claims 4 to 8,
    characterised in that each rib (6; 8; 56; 58) of each junction ace (10; 12; 52; 54) extends on either side of said junction face so as to form each time a first and a second tooth (26) and in that it features first and second fluid collectors (40) attached to each body element (2; 4; 51), wherein the first and second collectors (40) are each equipped with suitably shaped holes (46) to house at least partially said teeth (36) such that the fluid circulation ducts (18; 20; 64; 66) each open onto a first and a second collector (40).
  10. Heat exchanger according to claim 7, characterised in that each first rib (6) of said first body element (21) has angled sections (26, 28) connecting each tooth (36) to a central part of the first rib (6) such that said first and second teeth (36) are respectively disposed in planes that are sloped with respect to said first junction face (10).
  11. Heat exchanger according to claim 9 joined to any of claims 4 or 5, characterised in that each second rib (8) of said second body element (4) has an angled section (30; 32) connecting a first and a second tooth (36) to a central part of the said second rib (8) such that each tooth is disposed in a plane that is sloped with respect to said second junction face (12).
  12. Heat exchanger according to claim 9 joined to any of claims 6 to 8, characterised in that each fourth rib (8) of said third body element (4) has an angled section (30; 32) connecting a first and a second tooth to a central part of said fourth rib (8) such that each tooth is disposed in a plane that is sloped with respect to said fourth junction face (12).
  13. Heat exchanger according to claim 12, characterised in that each first and a second tooth (36) of the second (52) and third (54) junction faces are respectively fitted into a same collector (40) and into a same second collector (40).
  14. Heat exchanger according to any of the previous claims, characterised in that the first fluid circulation ducts (18) and the second fluid circulation ducts (20) are fitted in the first (6) and second (8) ribs respectively such that the first fluid circulation ducts (18) and the second fluid circulation ducts (20) are aligned.
  15. Heat exchanger according to any of the previous claims, characterised in that each body element (2; 4; 51) is formed as a one-piece profiled part.
  16. Heat exchanger according to claim 15, characterised in that said profiled part is obtained by extrusion.
  17. Heat exchanger according to any of the previous claims, characterised in that each first rib (6) and each second groove (16) have dimensions that are selected jointly for a tight fit.
  18. Heat exchanger according to any of the previous claims, characterised in that each rib (6, 8) of at least one of the body elements (2, 4) has a trapezoidal section.
  19. Heat exchanger according to any of claims 1 to 17,
    characterised in that each rib (6, 8) of at least one of the body elements (2; 4; 51) has a square section.
  20. Heat exchanger according to any of the previous claims, characterised in that each first rib (6) and each second groove (16), each first groove (14) and the second ribs (8) have identical sections such that the first (21) and the second (41) body elements have identical forms.
  21. Heat exchanger according to any of claims 9 to 12,
    characterised in that the body elements (2; 4) of which each rib (6; 8) has angled sections (26, 28, 30, 32) are curved at their ends so as to form said angled sections (26, 28, 30, 32).
  22. Heat exchanger according to any of the previous claims, characterised in that it is made in the form of an internal heat exchanger (1) for an air conditioning circuit.
EP05793075A 2004-08-03 2005-07-27 Easy-to-mount heat exchanger with improved heat transfer Active EP1782012B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0408591A FR2874082B1 (en) 2004-08-03 2004-08-03 HEAT EXCHANGER WITH EASY ASSEMBLY AND IMPROVED HEAT TRANSFER
PCT/FR2005/001962 WO2006024750A1 (en) 2004-08-03 2005-07-27 Easy-to-mount heat exchanger with improved heat transfer

Publications (2)

Publication Number Publication Date
EP1782012A1 EP1782012A1 (en) 2007-05-09
EP1782012B1 true EP1782012B1 (en) 2009-01-07

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EP05793075A Active EP1782012B1 (en) 2004-08-03 2005-07-27 Easy-to-mount heat exchanger with improved heat transfer

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EP (1) EP1782012B1 (en)
AT (1) ATE420332T1 (en)
DE (1) DE602005012282D1 (en)
ES (1) ES2319447T3 (en)
FR (1) FR2874082B1 (en)
WO (1) WO2006024750A1 (en)

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Publication number Priority date Publication date Assignee Title
JP6315945B2 (en) * 2013-11-08 2018-04-25 三菱電機株式会社 Heat exchanger
DE102014105680B3 (en) * 2014-04-23 2015-05-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Heat transfer device. Solar collector and heat pipe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB638298A (en) * 1947-03-29 1950-06-07 Power Jets Res & Dev Ltd Improvements in or relating to heat exchangers
FI100209B (en) * 1994-09-27 1997-10-15 Hadwaco Tech Oy Heat
FI101323B (en) * 1994-10-28 1998-05-29 Foster Wheeler Energia Oy Fireplace overheater and reactor with circulating bed with fireplace over heater
DE10045175A1 (en) * 1999-09-16 2001-05-17 Denso Corp Heat exchanger has two sets of pipes with connecting faces welded together except around indentation area formed on first connecting face of first pipe
JP2003279276A (en) * 2002-03-19 2003-10-02 Toyo Radiator Co Ltd Heat exchanger
JP2004150673A (en) * 2002-10-29 2004-05-27 Toyo Radiator Co Ltd Joining structure and joining method for pipe header to flat tube
JP2004233012A (en) * 2003-01-31 2004-08-19 Toyo Radiator Co Ltd Multiple hole pipe for heat exchanger, and the heat exchanger

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ES2319447T3 (en) 2009-05-07
ATE420332T1 (en) 2009-01-15
FR2874082A1 (en) 2006-02-10
WO2006024750A1 (en) 2006-03-09
DE602005012282D1 (en) 2009-02-26
EP1782012A1 (en) 2007-05-09
FR2874082B1 (en) 2006-11-24

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