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.

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• 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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=54478816

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (15)

• 2015
  • 2015-08-25 FR FR1557906A patent/FR3040478B1/fr not_active Expired - Fee Related
• 2016
  • 2016-08-02 CN CN201680062011.XA patent/CN108235723A/zh active Pending
  • 2016-08-02 US US15/754,677 patent/US20190041140A1/en not_active Abandoned
  • 2016-08-02 WO PCT/EP2016/068423 patent/WO2017032567A1/fr active Application Filing
  • 2016-08-02 EP EP16750715.1A patent/EP3341670A1/fr not_active Withdrawn

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