EP3341670A1 - Heat exchanger - Google Patents

Heat exchanger

Info

Publication number
EP3341670A1
EP3341670A1 EP16750715.1A EP16750715A EP3341670A1 EP 3341670 A1 EP3341670 A1 EP 3341670A1 EP 16750715 A EP16750715 A EP 16750715A EP 3341670 A1 EP3341670 A1 EP 3341670A1
Authority
EP
European Patent Office
Prior art keywords
spacers
flat tubes
heat exchanger
grooves
exchanger according
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Withdrawn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
EP16750715.1A
Other languages
German (de)
French (fr)
Inventor
Issiaka Traore
Kamel Azzouz
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 EP3341670A1 publication Critical patent/EP3341670A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0456—Air cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a heat exchanger, in particular for a motor vehicle.
  • Heat exchangers are generally composed of flat tubes grouped in a bundle and between which are placed spacers.
  • a first fluid for example a heat transfer liquid such as brine or a gas
  • a second fluid for example air
  • the flat tubes may be in the form of stacked elongated tubes or pairs of plates inside which is formed a circulation circuit of the first fluid.
  • the exchange surface between the first and the second fluid is increased because of the presence of the spacers but the thermal conductivity between these two fluids is also conditioned by the quality of the thermal bridge between the spacers and the flat tubes. Indeed, if this thermal bridge at the contact between the spacers and the flat tubes is not good, the efficiency of the heat exchanger will be less.
  • One of the aims of the present invention is therefore to at least partially overcome the disadvantages of the prior art and to provide an improved heat exchanger.
  • the present invention therefore relates to a heat exchanger comprising:
  • spacers disposed between said flat tubes, said spacers having a periodic profile whose ends are in contact with the outer surface of said flat tubes, said spacers being traversed by a second fluid, the flat tubes having on their outer surface grooves, the ends of the spacers and said grooves having a shape and a complementary length so that said ends of the inserts are inserted inside said grooves.
  • these grooves facilitates the assembly of the beam by providing a housing where can be inserted the ends of the spacers.
  • these grooves improve the contact between the outer surface of the flat tubes and spacers, which improves the heat exchange between these two elements.
  • the heat exchanger according to the invention is more efficient thanks to these grooves.
  • the ends of the spacers have the profile of a continuous line over the entire width of the flat tubes and a groove on the outer surface of the flat tubes form a single continuous line across the width of said flat tube.
  • the spacers comprise at least two strips of periodic profile offset from one another and that, over their width, the flat tubes have on their outer surface complementary segmented grooves of the ends of the strips. periodic profile.
  • the grooves on the outer surface of the flat tubes also form a protuberance on the inner surface of said flat tubes.
  • the grooves and the protuberances of the two walls of the flat tubes are arranged in alignment with each other.
  • the grooves and the protuberances of the two walls of the flat tubes are offset relative to each other.
  • the depth of the grooves is less than 50% of the height of the light of the flat tube, preferably between 40% and 30%.
  • the flat tubes each comprise a pair of plates inside which is formed a circulation circuit of the first fluid.
  • the periodic profile of the spacers is a sinusoidal profile.
  • the ends of the spacers are rounded. According to another aspect of the invention, the ends of the spacers are flat.
  • the periodic profile of the spacers is a crenellated profile. According to another aspect of the invention, the periodic profile of the spacers is a sawtooth profile
  • the flat tubes and the spacers are made of metallic material and fixed together by brazing.
  • FIG. 1 is a diagrammatic representation in perspective of a flat tube comprising inserts on its two faces according to a first embodiment
  • FIG. 2 is a diagrammatic representation in plan view of a flat tube according to the first embodiment
  • FIG. 3 is a diagrammatic representation in perspective of an insert according to a second embodiment
  • FIG. 4 is a diagrammatic representation in plan view of a flat tube according to the second embodiment
  • FIGS. 5a and 5b are diagrammatic representations in section of a flat tube comprising interleaves on its two faces according to two different embodiments
  • FIG. 6 is a diagrammatic representation in section of the connection between a flat tube and a spacer
  • FIGS. 7a to 7c are diagrammatic representations in section of a flat tube comprising interleaves according to alternative embodiments.
  • first element or second element as well as first parameter and second parameter, or first criterion and second criterion, and so on.
  • first element or second element as well as first parameter and second parameter, or first criterion and second criterion, and so on.
  • he is a simple indexing to differentiate and name elements or parameters or criteria close but not identical.
  • This indexing does not imply a priority of one element, parameter or criterion with respect to another, and it is easy to interchange such denominations without departing from the scope of the present description.
  • This indexing does not imply either an order in time for example to appreciate such or such criteria.
  • a heat exchanger particularly in the automotive field, generally comprises:
  • spacers 3 generally have a periodic profile whose ends 30 are in contact with the outer surface of said flat tubes 2. Said spacers 3 are traversed by a second fluid.
  • the flat tubes 2 and the spacers 3 generally form a bundle and the ends of the flat tubes are connected to collectors of the first fluid.
  • the flat tubes 2 may for example be tubes having, in cross section, an oblong and relatively flat shape. They can also be in the form of a pair of plates forming a circulation circuit of the first fluid. In this case, the pairs of plates are superimposed to form the beam, the second fluid flowing between the pairs of plates.
  • the flat tubes 2 have on their outer surface grooves 20 (the one in contact with the second fluid).
  • the ends 30 of the spacers 3 and said grooves 20 have a shape and a complementary length so that said ends 30 of the spacers 3 fit inside said grooves 20.
  • the presence of these grooves 20 facilitates assembly of the beam by providing a housing where can be inserted the ends of the spacers 3.
  • these grooves 20 improve the contact between the outer surface of the flat tubes 2 and spacers, which improves the heat exchange between these two elements.
  • the heat exchanger according to the invention is more efficient thanks to these grooves 20.
  • the ends 30 of the spacers 3 may have the profile of a continuous line over the entire width of the flat tubes 2.
  • a corresponding groove 20 on the outer surface of the flat tubes 2 forms a single continuous line on the width of said flat tube 2, as shown in Figure 2.
  • the spacers 3 may comprise at least two strips 31 of periodic profile offset with respect to each other.
  • the flat tubes 2 have on their outer surface, over their width, grooves 20 segmented complementary ends 30 of the strips 31 of periodic profile.
  • a groove 20 on the outer surface of the flat tubes 2 also forms a protuberance 21 on the inner surface (that in contact with the first fluid) of the flat tubes 2. disturbance of the first fluid and a homogenization of the latter, which improves the heat exchange and therefore the performance of the heat exchanger due to the turbulence created.
  • the grooves 20 and the protuberances 21 of the two walls of the flat tubes 2 are disposed vertically to one another, as illustrated in Figure 5a.
  • the grooves 20 and the protuberances 21 of the two walls of the flat tubes 2 are offset relative to each other, as illustrated in FIG. 5b. This second embodiment allows better agitation and better homogenization of the first fluid and therefore provides better performance.
  • the depth of the grooves 20, and therefore the height of the protuberances 21, is preferably less than 50% of the height of the light 22 of the flat tube 2. This depth may especially be between 40% and 30% of the height. of the light 22 of the flat tube 2.
  • the flat tubes 2 and the spacers 3 are made of metal material and fixed together by brazing.
  • a brazing band 40 is then present between the ends 30 of the spacers 3 and the grooves 20 as illustrated in FIG. 6.
  • the periodic profile of the spacers 3 may be a sinusoidal profile as illustrated in FIGS. 1 to 7a.
  • the ends 30 of the spacers 3 are rounded, as illustrated in FIGS. 1 to 6.
  • the grooves 20 also have a rounded bottom to suitably receive said ends 30 of the spacers 3.
  • the ends 30 of the spacers 3 having a sinusoidal profile are flat, as shown in FIG. 7a.
  • the grooves 20 also have a flat bottom to suitably receive said ends 30 of the spacers 3.
  • the spacers 3 may have a sawtooth profile, as shown in FIG. 7b, or even crenellated, as illustrated in FIG. 7c.
  • the grooves 20 have a suitable and corresponding shape for suitably receive the ends 30 of the interlayers 3 to maximize heat exchange.

Landscapes

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

Abstract

The present invention concerns a heat exchanger comprising: ◦ a plurality of flat tubes (2) arranged parallel to each other, and in which there flows a first fluid, ◦ spacers (3) arranged between said flat tubes (2), said spacers (3) having a periodic profile of which the ends (30) are in contact with the outer surface of said flat tubes (2), said spacers (3) being traversed by a second fluid, the flat tubes (2) comprising grooves (20) on the outer surface of same, the ends (30) of the spacers (3) and said grooves (20) having a matching shape and length, such that said ends (30) of the spacers (3) insert into said grooves (20).

Description

Echangeur de chaleur  Heat exchanger
L'invention concerne un échangeur de chaleur, en particulier pour véhicule automobile. The invention relates to a heat exchanger, in particular for a motor vehicle.
Les échangeurs de chaleur, notamment dans le domaine automobile, sont généralement composés de tubes plats regroupés en faisceau et entre les lesquels sont placés des intercalaires. Un premier fluide, par exemple un liquide caloporteur tel que de l'eau glycolée ou un gaz, passe à l'intérieur des tubes plats et un deuxième fluide, par exemple de l'air, passe entre lesdits tubes plats au travers des intercalaires. Les tubes plats peuvent être sous forme de tubes allongés empilés ou alors de paires de plaques à l'intérieur desquelles est formé un circuit de circulation du premier fluide. Heat exchangers, especially in the automotive field, are generally composed of flat tubes grouped in a bundle and between which are placed spacers. A first fluid, for example a heat transfer liquid such as brine or a gas, passes inside the flat tubes and a second fluid, for example air, passes between said flat tubes through the spacers. The flat tubes may be in the form of stacked elongated tubes or pairs of plates inside which is formed a circulation circuit of the first fluid.
La surface d'échange entre le premier et le deuxième fluide est augmentée du fait de la présence des intercalaires mais la conductivité thermique entre ces deux fluides est également conditionnée par la qualité du pont thermique entre les intercalaires et les tubes plats. En effet, si ce pont thermique au niveau du contact entre les intercalaires et les tubes plats n'est pas bon, l'efficacité de l'échangeur thermique sera moindre.  The exchange surface between the first and the second fluid is increased because of the presence of the spacers but the thermal conductivity between these two fluids is also conditioned by the quality of the thermal bridge between the spacers and the flat tubes. Indeed, if this thermal bridge at the contact between the spacers and the flat tubes is not good, the efficiency of the heat exchanger will be less.
Un des buts de la présente invention est donc de remédier au moins partiellement aux inconvénients de l'art antérieur et de proposer un échangeur de chaleur amélioré. One of the aims of the present invention is therefore to at least partially overcome the disadvantages of the prior art and to provide an improved heat exchanger.
La présente invention concerne donc un échangeur de chaleur comprenant :The present invention therefore relates to a heat exchanger comprising:
0 une multiplicité de tubes plats disposés parallèlement les uns des autres, et dans lesquels circulent un premier fluide, 0 a plurality of flat tubes arranged parallel to each other, and wherein a first fluid flows,
0 des intercalaires disposés entre lesdits tubes plats, lesdits intercalaires ayant un profil périodique dont les extrémités sont en contact avec la surface externe desdits tubes plats, lesdits intercalaires étant traversés par un deuxième fluide, les tubes plats comportant sur leur surface externe des sillons, les extrémités des intercalaires et lesdits sillons ayant une forme et une longueur complémentaire de sorte que lesdites extrémités des intercalaires s'insèrent à l'intérieur desdits sillons. 0 spacers disposed between said flat tubes, said spacers having a periodic profile whose ends are in contact with the outer surface of said flat tubes, said spacers being traversed by a second fluid, the flat tubes having on their outer surface grooves, the ends of the spacers and said grooves having a shape and a complementary length so that said ends of the inserts are inserted inside said grooves.
La présence de ces sillons permet de faciliter le montage du faisceau en procurant un logement où peuvent venir s'insérer les extrémités des intercalaires. De plus, ces sillons améliorent le contact entre la surface externe des tubes plats et des intercalaires, ce qui améliore les échanges thermiques entre ces deux éléments. A taille équivalente, l'échangeur de chaleur selon l'invention est plus performant grâce à ces sillons.  The presence of these grooves facilitates the assembly of the beam by providing a housing where can be inserted the ends of the spacers. In addition, these grooves improve the contact between the outer surface of the flat tubes and spacers, which improves the heat exchange between these two elements. At equivalent size, the heat exchanger according to the invention is more efficient thanks to these grooves.
Selon un aspect de l'invention, les extrémités des intercalaires ont le profil d'une ligne continue sur toute la largeur des tubes plats et qu'un sillon sur la surface externe des tubes plats forme une seule ligne continue sur la largeur dudit tube plat. Selon un autre aspect de l'invention, les intercalaires comportent au moins deux bandes de profil périodique décalées l'une par rapport aux autres et que, sur leur largeur, les tubes plats comportent sur leur surface externe des sillons segmentés complémentaires des extrémités des bandes de profil périodique. Selon un autre aspect de l'invention, les sillons sur la surface externe des tubes plats forment également une protubérance sur la surface interne desdits tubes plats. According to one aspect of the invention, the ends of the spacers have the profile of a continuous line over the entire width of the flat tubes and a groove on the outer surface of the flat tubes form a single continuous line across the width of said flat tube. . According to another aspect of the invention, the spacers comprise at least two strips of periodic profile offset from one another and that, over their width, the flat tubes have on their outer surface complementary segmented grooves of the ends of the strips. periodic profile. According to another aspect of the invention, the grooves on the outer surface of the flat tubes also form a protuberance on the inner surface of said flat tubes.
Selon un autre aspect de l'invention, les sillons et les protubérances des deux parois des tubes plats sont disposés à l'aplomb les uns des autres. According to another aspect of the invention, the grooves and the protuberances of the two walls of the flat tubes are arranged in alignment with each other.
Selon un autre aspect de l'invention, les sillons et les protubérances des deux parois des tubes plats sont décalés les un par rapport aux autres. Selon un autre aspect de l'invention, la profondeur des sillons est inférieure à 50 % de la hauteur de la lumière du tube plat, de préférence comprise entre 40 % et 30 %. Selon un autre aspect de l'invention, les tubes plats comportent chacun une paire des plaques à l'intérieure de laquelle est formé un circuit de circulation du premier fluide. According to another aspect of the invention, the grooves and the protuberances of the two walls of the flat tubes are offset relative to each other. According to another aspect of the invention, the depth of the grooves is less than 50% of the height of the light of the flat tube, preferably between 40% and 30%. According to another aspect of the invention, the flat tubes each comprise a pair of plates inside which is formed a circulation circuit of the first fluid.
Selon un autre aspect de l'invention, le profil périodique des intercalaires est un profil sinusoïdale. According to another aspect of the invention, the periodic profile of the spacers is a sinusoidal profile.
Selon un autre aspect de l'invention, les extrémités des intercalaires sont arrondies. Selon un autre aspect de l'invention, les extrémités des intercalaires sont plates. According to another aspect of the invention, the ends of the spacers are rounded. According to another aspect of the invention, the ends of the spacers are flat.
Selon un autre aspect de l'invention, le profil périodique des intercalaires est un profil crénelé. Selon un autre aspect de l'invention, le profil périodique des intercalaires est un profil en dent de scie According to another aspect of the invention, the periodic profile of the spacers is a crenellated profile. According to another aspect of the invention, the periodic profile of the spacers is a sawtooth profile
Selon un autre aspect de l'invention, les tubes plats et les intercalaires sont réalisés en matériau métallique et fixés entre eux par brasage. According to another aspect of the invention, the flat tubes and the spacers are made of metallic material and fixed together by brazing.
D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante, donnée à titre d'exemple illustratif et non limitatif, et des dessins annexés parmi lesquels : la figure 1 est une représentation schématique en perspective d'un tube plat comportant des intercalaires sur ses deux faces selon un premier mode de réalisation, Other features and advantages of the invention will emerge more clearly on reading the following description, given by way of illustrative and nonlimiting example, and the appended drawings among which: FIG. 1 is a diagrammatic representation in perspective of a flat tube comprising inserts on its two faces according to a first embodiment,
la figure 2 est une représentation schématique en vue de dessus d'un tube plat selon le premier mode de réalisation,  FIG. 2 is a diagrammatic representation in plan view of a flat tube according to the first embodiment,
la figure 3 est une représentation schématique en perspective d'un intercalaire selon un deuxième mode de réalisation,  FIG. 3 is a diagrammatic representation in perspective of an insert according to a second embodiment,
la figure 4 est une représentation schématique en vue de dessus d'un tube plat selon le deuxième mode de réalisation,  FIG. 4 is a diagrammatic representation in plan view of a flat tube according to the second embodiment,
- les figures 5a et 5b sont des représentations schématiques en coupe d'un tube plat comportant des intercalaires sur ses deux faces selon deux modes de réalisation différents,  FIGS. 5a and 5b are diagrammatic representations in section of a flat tube comprising interleaves on its two faces according to two different embodiments,
la figure 6 est une représentation schématique en coupe de la liaison entre un tube plat et un intercalaire,  FIG. 6 is a diagrammatic representation in section of the connection between a flat tube and a spacer,
- les figures 7a à 7c sont des représentations schématiques en coupe d'un tube plat comportant des intercalaires selon des modes de réalisation alternatifs.  FIGS. 7a to 7c are diagrammatic representations in section of a flat tube comprising interleaves according to alternative embodiments.
Les éléments identiques sur les différentes figures, portent les mêmes références. Les réalisations suivantes sont des exemples. Bien que la description se réfère à un ou plusieurs modes de réalisation, ceci ne signifie pas nécessairement que chaque référence concerne le même mode de réalisation, ou que les caractéristiques s'appliquent seulement à un seul mode de réalisation. De simples caractéristiques de différents modes de réalisation peuvent également être combinées pour fournir d'autres réalisations. The identical elements in the different figures bear the same references. The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments may also be combined to provide other embodiments.
Dans la présente description on peut indexer certains éléments ou paramètres, comme par exemple premier élément ou deuxième élément ainsi que premier paramètre et second paramètre ou encore premier critère et deuxième critère etc. Dans ce cas, il s'agit d'un simple indexage pour différencier et dénommer des éléments ou paramètres ou critères proches mais non identiques. Cette indexation n'implique pas une priorité d'un élément, paramètre ou critère par rapport à un autre et on peut aisément interchanger de telles dénominations sans sortir du cadre de la présente description. Cette indexation n'implique pas non plus un ordre dans le temps par exemple pour apprécier tel ou tels critères. In the present description, it is possible to index certain elements or parameters, for example first element or second element as well as first parameter and second parameter, or first criterion and second criterion, and so on. In this case, he is a simple indexing to differentiate and name elements or parameters or criteria close but not identical. This indexing does not imply a priority of one element, parameter or criterion with respect to another, and it is easy to interchange such denominations without departing from the scope of the present description. This indexing does not imply either an order in time for example to appreciate such or such criteria.
Un échangeur de chaleur, notamment dans le domaine automobile, comprend généralement: A heat exchanger, particularly in the automotive field, generally comprises:
0 une multiplicité de tubes plats 2 disposés parallèlement les uns des autres, et dans lesquels circulent un premier fluide, et 0 a plurality of flat tubes 2 arranged parallel to each other, and wherein a first fluid flows, and
0 des intercalaires 3 disposés entre lesdits tubes plats 2. 0 spacers 3 arranged between said flat tubes 2.
Ces intercalaires 3 ont généralement un profil périodique dont les extrémités 30 sont en contact avec la surface externe desdits tubes plats 2. Lesdits intercalaires 3 sont traversés par un deuxième fluide.  These spacers 3 generally have a periodic profile whose ends 30 are in contact with the outer surface of said flat tubes 2. Said spacers 3 are traversed by a second fluid.
Les tubes plats 2 et les intercalaires 3 forment généralement un faisceau et les extrémités des tubes plats sont reliées à des collecteurs du premier fluide. Les tubes plats 2 peuvent par exemple être des tubes ayant, en section transversale, une forme oblongue et relativement plate. Ils peuvent également être sous forme d'une paire de plaques formant un circuit de circulation du premier fluide. Dans ce cas, les paires de plaques sont superposées pour former le faisceau, le deuxième fluide circulant entre les paires de plaques.  The flat tubes 2 and the spacers 3 generally form a bundle and the ends of the flat tubes are connected to collectors of the first fluid. The flat tubes 2 may for example be tubes having, in cross section, an oblong and relatively flat shape. They can also be in the form of a pair of plates forming a circulation circuit of the first fluid. In this case, the pairs of plates are superimposed to form the beam, the second fluid flowing between the pairs of plates.
Comme cela est illustré sur les figures 1 et 2, les tubes plats 2 comportent sur leur surface externe des sillons 20 (celle en contact avec le deuxième fluide). Les extrémités 30 des intercalaires 3 et lesdits sillons 20 ont une forme et une longueur complémentaire de sorte que lesdites extrémités 30 des intercalaires 3 s'insèrent à l'intérieur desdits sillons 20. La présence de ces sillons 20 permet de faciliter le montage du faisceau en procurant un logement où peuvent venir s'insérer les extrémités des intercalaires 3. De plus, ces sillons 20 améliorent le contact entre la surface externe des tubes plats 2 et des intercalaires, ce qui améliore les échanges thermiques entre ces deux éléments. A taille équivalente, l'échangeur de chaleur selon l'invention est plus performant grâce à ces sillons 20. As illustrated in Figures 1 and 2, the flat tubes 2 have on their outer surface grooves 20 (the one in contact with the second fluid). The ends 30 of the spacers 3 and said grooves 20 have a shape and a complementary length so that said ends 30 of the spacers 3 fit inside said grooves 20. The presence of these grooves 20 facilitates assembly of the beam by providing a housing where can be inserted the ends of the spacers 3. In addition, these grooves 20 improve the contact between the outer surface of the flat tubes 2 and spacers, which improves the heat exchange between these two elements. At equivalent size, the heat exchanger according to the invention is more efficient thanks to these grooves 20.
Comme illustré sur la figure 1, les extrémités 30 des intercalaires 3 peuvent avoir le profil d'une ligne continue sur toute la largeur des tubes plats 2. Ainsi, un sillon 20 correspondant sur la surface externe des tubes plats 2 forme une seule ligne continue sur la largeur dudit tube plat 2, comme le montre la figure 2. As illustrated in Figure 1, the ends 30 of the spacers 3 may have the profile of a continuous line over the entire width of the flat tubes 2. Thus, a corresponding groove 20 on the outer surface of the flat tubes 2 forms a single continuous line on the width of said flat tube 2, as shown in Figure 2.
A contrario, et comme illustré à la figure 3, les intercalaires 3 peuvent comporter au moins deux bandes 31 de profil périodique décalées l'une par rapport aux autres. Ainsi, comme le montre la figure 4, les tubes plats 2 comportent sur leur surface externe, sur leur largeur, des sillons 20 segmentés complémentaires des extrémités 30 des bandes 31 de profil périodique. Conversely, and as illustrated in Figure 3, the spacers 3 may comprise at least two strips 31 of periodic profile offset with respect to each other. Thus, as shown in Figure 4, the flat tubes 2 have on their outer surface, over their width, grooves 20 segmented complementary ends 30 of the strips 31 of periodic profile.
Comme le montrent plus particulièrement les figures 5a et 5b, un sillon 20 sur la surface externe des tubes plats 2 forme également une protubérance 21 sur la surface interne (celle en contact avec le premier fluide) des tubes plats 2. Cette protubérance 21 permet une perturbation du premier fluide et une homogénéisation de ce dernier, ce qui améliore les échanges thermiques et donc la performance de l'échangeur de chaleur grâce aux turbulences créées. As is more particularly shown in FIGS. 5a and 5b, a groove 20 on the outer surface of the flat tubes 2 also forms a protuberance 21 on the inner surface (that in contact with the first fluid) of the flat tubes 2. disturbance of the first fluid and a homogenization of the latter, which improves the heat exchange and therefore the performance of the heat exchanger due to the turbulence created.
Selon un premier mode de réalisation, les sillons 20 et les protubérances 21 des deux parois des tubes plats 2 sont disposés à l'aplomb les un des autres, comme illustré sur la figure 5a. Selon un deuxième mode de réalisation, les sillons 20 et les protubérances 21 des deux parois des tubes plats 2 sont décalés les uns par rapport aux autres, comme illustré à la figure 5b. Ce deuxième mode de réalisation permet une meilleure agitation et une meilleure homogénéisation du premier fluide et donc permet de meilleures performances. According to a first embodiment, the grooves 20 and the protuberances 21 of the two walls of the flat tubes 2 are disposed vertically to one another, as illustrated in Figure 5a. According to a second embodiment, the grooves 20 and the protuberances 21 of the two walls of the flat tubes 2 are offset relative to each other, as illustrated in FIG. 5b. This second embodiment allows better agitation and better homogenization of the first fluid and therefore provides better performance.
La profondeur des sillons 20, et donc par conséquence la hauteur des protubérances 21, est de préférence inférieure à 50 % de la hauteur de la lumière 22 du tube plat 2. Cette profondeur peut notamment être comprise entre 40 % et 30 % de la hauteur de la lumière 22 du tube plat 2. The depth of the grooves 20, and therefore the height of the protuberances 21, is preferably less than 50% of the height of the light 22 of the flat tube 2. This depth may especially be between 40% and 30% of the height. of the light 22 of the flat tube 2.
Les tubes plats 2 et les intercalaires 3 sont réalisés en matériau métallique et fixés entre eux par brasage. Une bande de brasage 40 est alors présente entre les extrémités 30 des intercalaires 3 et les sillons 20 comme illustré sur la figure 6. The flat tubes 2 and the spacers 3 are made of metal material and fixed together by brazing. A brazing band 40 is then present between the ends 30 of the spacers 3 and the grooves 20 as illustrated in FIG. 6.
Le profil périodique des intercalaires 3 peut être un profil sinusoïdal comme illustré aux figures 1 à 7a. Selon un premier mode de réalisation, les extrémités 30 des intercalaires 3 sont arrondies, comme illustré aux figures 1 à 6. Par correspondance, les sillons 20 ont également un fond arrondi pour recevoir convenablement lesdites extrémités 30 des intercalaires 3. The periodic profile of the spacers 3 may be a sinusoidal profile as illustrated in FIGS. 1 to 7a. According to a first embodiment, the ends 30 of the spacers 3 are rounded, as illustrated in FIGS. 1 to 6. By correspondence, the grooves 20 also have a rounded bottom to suitably receive said ends 30 of the spacers 3.
Selon un deuxième mode de réalisation, les extrémités 30 des intercalaires 3 ayant un profil sinusoïdal sont plates, comme illustré à la figure 7a. Par correspondance, les sillons 20 ont également un fond plat pour recevoir convenablement lesdites extrémités 30 des intercalaires 3.  According to a second embodiment, the ends 30 of the spacers 3 having a sinusoidal profile are flat, as shown in FIG. 7a. Correspondingly, the grooves 20 also have a flat bottom to suitably receive said ends 30 of the spacers 3.
Selon d'autres modes de réalisations, les intercalaires 3 peuvent avoir un profil en dent de scie, comme illustré à la figure 7b, ou bien encore crénelé, comme illustré à la figure 7c. Quelque soit la forme des extrémités 30 des intercalaires 3 ou bien le profil desdits intercalaires, les sillons 20 ont une forme adaptée et correspondante pour recevoir convenablement les extrémités 30 des intercalaires 3 afin de maximiser échanges thermiques. According to other embodiments, the spacers 3 may have a sawtooth profile, as shown in FIG. 7b, or even crenellated, as illustrated in FIG. 7c. Whatever the shape of the ends 30 of the spacers 3 or the profile of said spacers, the grooves 20 have a suitable and corresponding shape for suitably receive the ends 30 of the interlayers 3 to maximize heat exchange.
Ainsi, on voit bien que l'échangeur de chaleur, du fait de la présence des sillons 20 et de la liaison améliorée entre les intercalaires 3 et les tubes plats 2, est plus performant. Thus, it is clear that the heat exchanger, due to the presence of the grooves 20 and the improved connection between the spacers 3 and the flat tubes 2, is more efficient.

Claims

REVENDICATIONS
1. Échangeur de chaleur comprenant : 1. Heat exchanger comprising:
0 une multiplicité de tubes plats (2) disposés parallèlement les uns des autres, et dans lesquels circulent un premier fluide,  A multiplicity of flat tubes (2) arranged parallel to one another, and in which a first fluid circulates,
0 des intercalaires (3) disposés entre lesdits tubes plats (2), lesdits intercalaires (3) ayant un profil périodique dont les extrémités (30) sont en contact avec la surface externe desdits tubes plats (2), lesdits intercalaires (3) étant traversés par un deuxième fluide, 0 spacers (3) disposed between said flat tubes (2), said spacers (3) having a periodic profile whose ends (30) are in contact with the outer surface of said flat tubes (2), said spacers (3) being crossed by a second fluid,
caractérisé en ce que les tubes plats (2) comportent sur leur surface externe des sillons (20), les extrémités (30) des intercalaires (3) et lesdits sillons (20) ayant une forme et une longueur complémentaire de sorte que lesdites extrémités (30) des intercalaires (3) s'insèrent à l'intérieur desdits sillons (20).  characterized in that the flat tubes (2) have on their outer surface grooves (20), the ends (30) of the spacers (3) and said grooves (20) having a shape and a complementary length so that said ends (20) 30) inserts (3) fit within said grooves (20).
2. Échangeur de chaleur selon la revendication 1, caractérisé en ce que les extrémités (30) des intercalaires (3) ont le profil d'une ligne continue sur toute la largeur des tubes plats (2) et qu'un sillon (20) sur la surface externe des tubes plats (2) forme une seule ligne continue sur la largeur dudit tube plat (2). 2. Heat exchanger according to claim 1, characterized in that the ends (30) of the spacers (3) have the profile of a continuous line over the entire width of the flat tubes (2) and a groove (20). on the outer surface of the flat tubes (2) forms a single continuous line across the width of said flat tube (2).
3. Échangeur de chaleur selon la revendication 1, caractérisé en ce que les intercalaires (3) comportent au moins deux bandes (31) de profil périodique décalées l'une par rapport aux autres et que, sur leur largeur, les tubes plats (2) comportent sur leur surface externe des sillons (20) segmentés complémentaires des extrémités (30) des bandes (31) de profil périodique. 3. Heat exchanger according to claim 1, characterized in that the spacers (3) comprise at least two strips (31) of periodic profile offset relative to each other and that, over their width, the flat tubes (2) ) comprise on their outer surface grooves (20) segmented complementary ends (30) of the strips (31) of periodic profile.
4. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que les sillons (20) sur la surface externe des tubes plats (2) forment également une protubérance (21) sur la surface interne desdits tubes plats (2). 4. Heat exchanger according to one of the preceding claims, characterized in that the grooves (20) on the outer surface of the flat tubes (2) also form a protuberance (21) on the inner surface of said flat tubes (2).
5. Échangeur de chaleur selon la revendication précédente, caractérisé en ce que les sillons (20) et les protubérances (21) des deux parois des tubes plats (2) sont disposés à l'aplomb les un des autres. 5. Heat exchanger according to the preceding claim, characterized in that the grooves (20) and the protuberances (21) of the two walls of the flat tubes (2) are arranged in alignment with one another.
6. Échangeur de chaleur selon la revendication 4, caractérisé en ce que les sillons (20) et les protubérances (21) des deux parois des tubes plats (2) sont décalés les un par rapport aux autres. 6. Heat exchanger according to claim 4, characterized in that the grooves (20) and the protuberances (21) of the two walls of the flat tubes (2) are offset relative to each other.
7. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que la profondeur des sillons (20) est inférieure à 50 % de la hauteur de la lumière (22) du tube plat (2), de préférence comprise entre 40 % et 30 %. 7. Heat exchanger according to one of the preceding claims, characterized in that the depth of the grooves (20) is less than 50% of the height of the slot (22) of the flat tube (2), preferably between 40 % and 30%.
8. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que les tubes plats (2) comportent chacun une paire de plaques à l'intérieure de laquelle est formé un circuit de circulation du premier fluide. 8. Heat exchanger according to one of the preceding claims, characterized in that the flat tubes (2) each comprise a pair of plates inside which is formed a circulation circuit of the first fluid.
9. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que le profil périodique des intercalaires (3) est un profil sinusoïdal. 9. Heat exchanger according to one of the preceding claims, characterized in that the periodic profile of the spacers (3) is a sinusoidal profile.
10. Échangeur de chaleur selon la revendication précédente, caractérisé en ce que les extrémités (30) des intercalaires (3) sont arrondies. 10. Heat exchanger according to the preceding claim, characterized in that the ends (30) of the spacers (3) are rounded.
11. Échangeur de chaleur selon la revendication 9, caractérisé en ce que les extrémités (30) des intercalaires (3) sont plates. 11. Heat exchanger according to claim 9, characterized in that the ends (30) of the spacers (3) are flat.
12. Échangeur de chaleur selon l'une des revendications 1 à 8, caractérisé en ce que le profil périodique des intercalaires (3) est un profil crénelé. 12. Heat exchanger according to one of claims 1 to 8, characterized in that the periodic profile of the spacers (3) is a crenellated profile.
13. Échangeur de chaleur selon l'une des revendications 1 à 8, caractérisé en ce que le profil périodique des intercalaires (3) est un profil en dent de scie 13. Heat exchanger according to one of claims 1 to 8, characterized in that the periodic profile of the spacers (3) is a sawtooth profile
14. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que les tubes plats (2) et les intercalaires (3) sont réalisés en matériau métallique et fixés entre eux par brasage. 14. Heat exchanger according to one of the preceding claims, characterized in that the flat tubes (2) and the spacers (3) are made of metal material and fixed together by brazing.
EP16750715.1A 2015-08-25 2016-08-02 Heat exchanger Withdrawn EP3341670A1 (en)

Applications Claiming Priority (2)

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FR1557906A FR3040478B1 (en) 2015-08-25 2015-08-25 HEAT EXCHANGER
PCT/EP2016/068423 WO2017032567A1 (en) 2015-08-25 2016-08-02 Heat exchanger

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EP3341670A1 true EP3341670A1 (en) 2018-07-04

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CN (1) CN108235723A (en)
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WO (1) WO2017032567A1 (en)

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FR3106000B1 (en) * 2020-01-03 2022-01-14 Valeo Systemes Thermiques Tube heat exchanger with spacers
FR3106001B1 (en) * 2020-01-03 2022-12-02 Valeo Systemes Thermiques Tube heat exchanger with spacers

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JPS51163574U (en) * 1975-06-20 1976-12-27
JPS55158496A (en) * 1979-05-29 1980-12-09 Nippon Radiator Co Ltd Manufacturing of core for heat exchanger
JPS5680698A (en) * 1979-11-30 1981-07-02 Nippon Denso Co Ltd Heat exchanger
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JPS60145268A (en) * 1984-01-04 1985-07-31 Nippon Denso Co Ltd Production of heat exchanging element
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JP3328923B2 (en) * 1997-01-24 2002-09-30 日本軽金属株式会社 Manufacturing method of aluminum heat exchanger core
JP2002323295A (en) * 2001-04-24 2002-11-08 Mitsubishi Heavy Ind Ltd Plate fin type heat exchanger
EP1640684A1 (en) * 2004-09-28 2006-03-29 Modine Manufacturing Company heat exchanger with flat tubes and corrugated fins
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CN108235723A (en) 2018-06-29
US20190041140A1 (en) 2019-02-07
FR3040478A1 (en) 2017-03-03
FR3040478B1 (en) 2017-12-15

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