Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/003—Multiple wall conduits, e.g. for leak detection
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
  • F28F13/14—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by endowing the walls of conduits with zones of different degrees of conduction of heat
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
  • B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
  • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
  • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
  • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
  • F28D1/0325—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
  • F28D1/0333—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
  • F28D1/0341—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members with U-flow or serpentine-flow inside the conduits
• • 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
  • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
  • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
  • F28D9/0056—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
  • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
  • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
  • F28D2021/0082—Charged air coolers
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/4935—Heat exchanger or boiler making
  • Y10T29/49393—Heat exchanger or boiler making with metallurgical bonding

Definitions

• the invention relates to the field of heat exchangers and more particularly to charge air heat exchangers in the automotive field. It is known in the field of the automobile to use heat exchangers comprising a stack of identical flat tubes in which a first fluid circulates.
• Each flat tube is generally formed of two plates of metal sheet stamped to form a bowl in a predefined pattern and arranged in such a way that their concavities are turned towards each other. The two plates are then connected in a sealed manner, thus forming a flat tube in which the first fluid can flow from a fluid inlet to a fluid outlet, each located at one end of the flat tube and more generally each located on opposite sides. of the plate.
• the flat tubes are stacked on each other, the fluid inlets of each flat tube being connected together to form an inlet column.
• each flat tube is interconnected to form an output column. Between each flat tube is left a space for the passage of a second fluid. The exchange of heat between the two fluids thus occurring during the passage of the first fluid in the flat tubes and the second fluid between said flat tubes.
• Such heat exchangers are commonly used as an evaporator in a refrigerant circuit for air conditioning.
• the passenger compartment of a motor vehicle this refrigerant constituting the first fluid and the second fluid being atmospheric air
• this coolant constituting the first fluid and the second fluid being atmospheric air.
• one of the aims of the invention is to at least partially overcome the disadvantages of the prior art and to provide an improved supercharging air heat exchanger.
• the present invention therefore relates to a flat tube of charge air heat exchanger made from at least one pressed metal sheet so as to form an exchange plate, said stamping allowing the connection between a fluid inlet and a fluid outlet by a circuit in which a heat transfer fluid circulates, said circuit comprising at least one fluid circulation path comprising at least two passes separated by a rib, said rib comprising at least one zone of least heat exchange between two passes adjacent to the fluid flow path.
• said flat tube is formed by the assembly of two exchange plates made from a stamped metal sheet and assembled to one another, the stamped sides of each plate of exchange facing each other.
• the at least one zone of least heat exchange between two adjacent passes of the circulation path is made by thinning material at the rib or ribs.
• the at least one zone of least heat exchange between two adjacent passes of the circulation path is made by a slot at the rib or ribs.
• said flat tube comprises a single zone of least heat exchange between two adjacent passes of the circulation path of length substantially equal to the length of the rib on which it is made.
• said flat tube comprises a plurality of areas of least heat exchange between two adjacent passes of the circulation path distributed along the rib on which it is made.
• the step of producing the at least one zone of least heat exchange between two adjacent passes is performed during stamping of the metal sheet so as to form an exchange plate .
• the step of producing the at least one zone of least heat exchange between two adjacent passes is performed by laser cutting of the exchange plate.
• the invention also relates to a charge air heat exchanger comprising at least one flat tube as previously described or obtained by a flat tube manufacturing method as described above.
• said exchanger comprises on both sides of the at least one flat tube a flow disturbance of a second heat transfer fluid and said disruptor also comprises, facing ribs, at least one zone of less heat exchange.
• FIGS. 1 and 2 show a schematic representation of an exchange plate according to two distinct embodiments
• FIG. 3 shows a schematic representation in section of a flat tube.
• the exchange plate 1 for a flat heat exchanger tube can be made from a stamped metal sheet. It comprises a fluid inlet 3a and a fluid outlet 3b.
• the stamping of the exchange plate 1 forms a cavity with ribs 7 defining a fluid flow circuit between the fluid inlet 3a and the fluid outlet 3b.
• the ribs 7 give the flow path a flow path of a first heat transfer fluid between the fluid inlet 3a and the fluid outlet 3b.
• This circulation path comprises at least two straight passes 5 connected by a curved portion 9.
• This circulation path allows an increase in the length of the flow circuit and therefore increases the time during which the first heat transfer fluid flows within it. , thereby increasing the time when there can be heat transfer with a second fluid flowing on the opposite side of the exchange plate 1.
• the ribs 7 may have rounded ends 11 .
• the ribs 7 also include at least one zone of least heat exchange 12 between two adjacent passes 5 of the fluid flow path.
• This at least one zone of least heat exchange 12 may be a slot passing through the exchange plate 1 at the level of the rib or ribs 7 or a thinning of material at the level of the rib or ribs 7 is still very weak.
• This at least one zone of least heat exchange 12 allows an isolation between the adjacent passes and limits the heat exchanges between said passes 5, which increases the efficiency of the the heat exchanger. This is particularly advantageous for a charge air heat exchanger where the first fluid is compressed and hot air and therefore must be cooled sufficiently to reduce the risk of self-ignition.
• the plate 1 has four passes 5 parallel to one another and three curved portions 9 making the connection between said passes 5.
• an exchange plate 1 and therefore a flat tube 100 comprises a single zone of least heat exchange 12 between two adjacent passes 5, this zone of slight heat exchange 12 having a substantially length equal to that of the rib 7 on which it is made.
• this zone of slight heat exchange 12 having a substantially length equal to that of the rib 7 on which it is made.
• an exchange plate 1 and therefore a flat tube 100 comprises a plurality of areas of least heat exchange 12 between two adjacent passes 5, this plurality of zones of least heat exchange 12 being distributed over a length substantially equal to that of the rib 7 on which it is made.
• the at least one curved portion 9 may comprise projections 91. These projections 91 may be integral with the at least one exchange plate 1, for example by being stamped, or even be elements attached and fixed inside the at least one curved portion 9 by any means known to those skilled in the art.
• the flat tubes 100 are generally constituted by the assembly of two exchange plates 1 between them, the passes 5 and curves 9 of the circuits and the ribs 7 of each of the two exchange plates 1 facing each other, forming the path of circulation of said flat tube 100.
• the assembly of the exchange plates 1 is made to be sealed, for example by soldering, in order to prevent any leakage of the coolant passing through the flat tube 100.
• Such flat tubes 100 are relatively thin for example their circulation path can have a height of imm to 3mm.
• a flat tube 100 may be the assembly of an exchange plate 1 with a flat plate resting on the periphery of the exchange plate 1 and on the ribs 7, covering the circuit of FIG. flow.
• the circuit comprises at least one insert 51 intended to disturb the circulation of the first heat transfer fluid and creating turbulence, as well as increasing the contact surface with the first fluid. coolant and therefore increase exchanges between said first fluid and the flat tube 100.
• the at least one insert 51 may be metal and thus be attached to the walls of the flat tube 100 by soldering.
• the insert 51 may have a corrugated conformation perpendicular to the direction of flow of the first heat transfer fluid, the ends of each corrugation being in contact with the walls of the flat tube 100.
• the insert 51 may also present, parallel to the direction of circulation of the heat transfer fluid in the flat tube 100, series of corrugated sections, offset relative to each other perpendicular to the direction of circulation of the coolant.
• the first heat transfer fluid then passes between the corrugations of each section, increasing the contact and exchange surface between the fluid and the walls of the flat tube 100, and during the passage from one corrugated section to another, the first heat transfer fluid undergoes a disturbance allowing homogenization of the temperature and therefore a better heat exchange efficiency with the flat tube 100.
• said insert 51 may also have other conformations allowing an increase in the contact surface as well as a homogenization of the fluid such as for example crenels, zigzags or slats.
• a flat-tube heat exchanger 100 comprises a stack of flat tubes 100 interconnected at their fluid inlet and outlet 3a, 3b, and each flat tube 100 being spaced to allow passage of a second fluid between said flat tubes 100.
• the flat tubes 100 are interconnected at the fluid inlet and outlet 3a, 3b in order to form a fluid inlet column comprising all the fluid inlets of all the flat tubes 100 and an outlet column. of fluid comprising all the fluid outlets of all the flat tubes 100.
• inserts 51 as inserts 51 in the passes 5 of the flat tubes 100, allows the latter to have a smooth wall and thus which facilitates the fixing, for example by brazing, of the interferers 102 in the space between two flat tubes 100.
• the disrupter 102 may, like the ribs 7, comprise at least one zone of lesser heat exchange (not shown) opposite said ribs 7.
• the method of manufacturing such flat tubes 100 may comprise the following steps:
• a first stamping step of at least one metal sheet so as to form at least one exchange plate 1 comprising a circuit connecting a fluid inlet 3a and a fluid outlet 3b, said circuit comprising said circuit comprising at least a fluid circulation path comprising at least two passes 5 separated by a rib 7.
• the second step of the manufacturing process is the realization of at least one zone of least heat exchange 12 on the ribs 7 between two adjacent passes 5 of the fluid flow path.
• This second step can be performed during the first stamping step of the at least one metal sheet so as to form at least one exchange plate 1 or so.
• This second step can also be performed by laser cutting of the exchange plate following the first step.
• An intermediate step of the manufacturing process may be the establishment, at the level of the passes 5, at least one insert 51 as described above.
• a third step of the manufacturing process is the closure of the flat tube 100.
• this step is preferably carried out by assembling two exchange plates 1 made from a stamped metal sheet and assembled to one another, the stamped sides of each exchange plate 1 facing each other.
• the exchange plates ⁇ are fixed together in leaktight manner, for example by brazing. This method of fixing by brazing also allows, inside the flat tube 100, the fixing of the at least one insert 51 against the inner walls of the flat tube 100 and also the fixing of the projections 91 facing each other.
• the flat tube 100 allows an optimal exchange of heat between a first heat transfer fluid flowing in it with a second external fluid and that because of the presence of zones of least heat exchange 12 which limit heat exchanges between the adjacent passes and thus improve the efficiency of the heat exchanger.

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

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (1)

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• 2012
  • 2012-12-18 FR FR1262264A patent/FR2999695A1/fr not_active Withdrawn
• 2013
  • 2013-12-18 KR KR1020157019075A patent/KR20150093242A/ko not_active Application Discontinuation
  • 2013-12-18 EP EP13811211.5A patent/EP2936029A1/de not_active Withdrawn
  • 2013-12-18 WO PCT/EP2013/077240 patent/WO2014096103A1/fr active Application Filing
  • 2013-12-18 US US14/652,321 patent/US20150345875A1/en not_active Abandoned

Patent Citations (1)

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