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US20190186324A1 - Heat recovery device and corresponding manufacturing process - Google Patents

Heat recovery device and corresponding manufacturing process Download PDF

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Publication number
US20190186324A1
US20190186324A1 US16/218,698 US201816218698A US2019186324A1 US 20190186324 A1 US20190186324 A1 US 20190186324A1 US 201816218698 A US201816218698 A US 201816218698A US 2019186324 A1 US2019186324 A1 US 2019186324A1
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US
United States
Prior art keywords
grate
casing
planar surface
edge
wall
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.)
Abandoned
Application number
US16/218,698
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English (en)
Inventor
Frédéric Greber
Yannick FOURCAUDOT
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.)
Faurecia Systemes dEchappement SAS
Original Assignee
Faurecia Systemes dEchappement SAS
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Filing date
Publication date
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Assigned to FAURECIA SYSTEMES D'ECHAPPEMENT reassignment FAURECIA SYSTEMES D'ECHAPPEMENT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FOURCAUDOT, YANNICK, Greber, Frédéric
Publication of US20190186324A1 publication Critical patent/US20190186324A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/0205—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1653—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having a square or rectangular shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • 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
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
    • 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
    • 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
    • F28D9/0037—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 conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F2001/027—Tubular elements of cross-section which is non-circular with dimples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/02—Reinforcing means for casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means
    • 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
    • F28F2275/04—Fastening; Joining by brazing
    • 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
    • F28F2275/06—Fastening; Joining by welding
    • 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
    • F28F2275/06—Fastening; Joining by welding
    • F28F2275/067—Fastening; Joining by welding by laser welding
    • 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
    • F28F3/044—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 pontual, e.g. dimples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core

Definitions

  • the invention generally relates to heat recovery devices for exhaust lines.
  • Motor vehicle exhaust lines may include heat exchangers of the type shown in FIG. 1 .
  • a heat exchanger 1 comprises a plurality of exhaust gas circulation tubes 3 . These tubes 3 are held at each of their longitudinal ends by a grate 5 .
  • a casing 7 is placed around the tubes 3 and grates 5 . The tubes 3 , the grates 5 , and the casing 7 are attached to one another by brazing in a furnace.
  • Each grate 5 includes an upright edge 9 oriented toward an outside of the heat exchanger 1 , to be attached on a body 11 , shown in FIG. 2 .
  • the body 11 is, for example, integrated into a three-way valve making it possible to orient the exhaust gases selectively either toward the heat exchanger 1 or toward a bypass pipe of the heat exchanger 1 .
  • An end rim 13 of the upright edge 9 must be far enough away from the junction between the grate 5 and the casing 7 so as not to cause the braze securing the grate 5 to the casing 7 to melt during the welding of the grate 5 on the body 11 .
  • the grate 5 has a generally rectangular shape. It may be formed from a flat metal sheet, the sides of which are folded down to give it a basin shape, and thus to create the upright edge 9 . The metal sheet is next pierced to create orifices for receiving the tubes 3 .
  • the shaping of the grate 5 does not make it possible to have a good surface condition, or good dimensional allowances, in each corner of the upright edge 9 .
  • the exchanger 1 can be attached to a barrel stretcher 15 arranged in the body 11 .
  • the upright edge 9 is inserted inside the barrel stretcher 15 .
  • the edges of the barrel stretcher 15 are absolutely not planar, due to the resilient return of the material during the shaping.
  • the edges of the barrel stretcher 15 are not perpendicular to the plane of the opening delimited in the body 11 , the undercut angle being approximately 2°.
  • the play between the upright edge 9 of the grate 5 and the barrel stretcher 15 is not constant, and may be greater than 0.5 mm on average.
  • the welding method traditionally used is MAG (Metal Active Gas). With such a welding method, the significant play between the upright edge 9 and the barrel stretcher 15 may generate defects, or even holes.
  • the upright edge 9 and the barrel stretcher 15 go past one another. Yet the length of the upright edge 9 is limited by the fact that the compression of the material in the corners becomes impossible past a certain limit.
  • the barrel stretcher 15 has a maximum length, related to the acceptable maximum elongation of the material.
  • the MAG method has certain known flaws, the most significant of which is deforming the parts to be welded, because these parts are heated to a high temperature, and locally.
  • This flaw is particularly critical when the heat exchanger 1 must be rigidly attached to a valve body, which must have a good final geometry in order for the axis of the flap to be able to rotate without interference with the valve body, and for the valve to have a good sealing level.
  • the invention aims to propose a heat recovery device that does not have the above flaws.
  • the invention relates to a heat recovery device for an exhaust line, the device comprising a body inwardly delimiting an exhaust gas circulation passage, and a heat exchanger, the heat exchanger comprising:
  • a casing having a proximal edge delimiting a proximal opening
  • each exhaust gas circulation tube having a proximal end engaged in one of the orifices and attached to the at least one grate, the at least one grate further having an upright edge extending around the wall and protruding from the wall toward an inside of the heat exchanger, the upright edge being rigidly attached to the casing;
  • the wall of the at least one grate having, around the orifices, a planar surface turned toward the body;
  • the body having a body opening delimited by a flat edge pressed against the planar surface;
  • planar surface and the flat edge being rigidly attached to one another to be tight with respect to exhaust gases.
  • the at least one grate is turned in a direction opposite FIG. 1 .
  • the height of the upright edge is less significant than in FIGS. 1 and 2 , since it is not necessary to extend the latter to the free edge of the barrel stretcher. It is only necessary to provide the junction with the casing of the heat exchanger. The manufacture of the at least one grate is easier, and the deformations are less pronounced.
  • the heat recovery device may also have one or more of the features below, considered individually or according to all technically possible combinations:
  • planar surface and the flat edge are rigidly attached to one another by laser welding or by brazing;
  • the upright edge of the at least one grate is rigidly attached to the proximal edge of the casing, the wall of the at least one grate being offset toward an outside of the casing;
  • planar surface has a closed contour and has a width of at least two millimeters
  • the casing includes a central tubular part having a first straight section, the proximal opening having a second section greater than the first straight section;
  • the proximal edge of the casing is connected to the central tubular part by a tubular segment that flares from the central tubular part, the tubular segment delimiting a heat transfer fluid circulation channel along the at least one grate;
  • the casing has a heat transfer fluid inlet and a heat transfer fluid outlet, the heat transfer fluid inlet being arranged in the central tubular part, the central tubular part having a zone protruding toward the outside of the casing extending from the heat transfer fluid inlet to the heat transfer fluid circulation channel along the at least one grate;
  • the exhaust gas circulation tubes have protuberances forming spacers maintaining a determined spacing between the exhaust gas circulation tubes, and between the exhaust gas circulation tubes and the casing, the protuberances in contact with the casing all being located outside the heat transfer fluid circulation channel along the grate;
  • the planar surface extends in a first plane, the orifices being surrounded by a ridge adjacent to the planar surface, the ridge extending in a second plane parallel to the first plane and offset toward the inside of the heat exchanger relative to the first plane.
  • the invention relates to a method for manufacturing a heat recovery device having the above features
  • FIG. 1 is a cross-sectional view of a heat exchanger not according to the invention.
  • FIG. 2 is a sectional view of one end of the heat exchanger of FIG. 1 , attached on a body;
  • FIG. 3 is an exploded view of heat exchanger of a heat recovery device according to the invention.
  • FIG. 4 is a longitudinal sectional view of the heat exchanger of FIG. 3 , in the assembled state
  • FIG. 5 is a sectional view of one end of the heat exchanger of FIGS. 3 and 4 , attached on a body;
  • FIG. 6 is a perspective view of the heat exchanger of FIGS. 3 to 5 ;
  • FIG. 7 is a bottom view of the heat exchanger, for an alternative embodiment
  • FIG. 8 is an enlarged sectional view of part of one of the grates of the heat exchanger of FIGS. 3 and 4 ;
  • FIG. 9 is a perspective view of the grate of FIG. 8 .
  • the heat recovery device 17 is provided to be integrated into an exhaust line, typically an exhaust line of a vehicle equipped with a heat engine.
  • the vehicle is, for example, a motor vehicle, typically a car or truck.
  • the heat recovery device 17 is provided to recover part of the heat energy from the exhaust gases circulating in the exhaust line.
  • the heat energy thus recovered is used on board the vehicle, for example to accelerate the temperature increase of the heat engine, or to heat the passenger cab.
  • the heat recovery device 17 shown in FIGS. 3 to 5 comprises a body 19 ( FIG. 5 ) inwardly delimiting an exhaust gas circulation passage 21 , and a heat exchanger 23 .
  • the body 19 has an opening 25 , through which the circulation passage 21 communicates with the heat exchanger 23 .
  • the body 19 is, for example, a valve body.
  • the valve is typically a three-way valve, the body 19 having at least one exhaust gas inlet and two outlets, all communicating fluidly with the circulation passage 21 .
  • the inlet is in fluid communication with a collector capturing the exhaust gases at the outlet of the combustion chambers of the heat engine.
  • One of the outlets constitutes the opening 25 and communicates with the exhaust gas circulation side of the heat exchanger 23 .
  • the other outlet emerges in a bypass pipe of the heat exchanger. In FIG. 5 , only one opening 25 has been shown.
  • the body 19 is an exhaust gas circulation pipe, the heat exchanger being mounted in a bypass on said pipe.
  • the heat exchanger 23 comprises a casing 27 , and a plurality of exhaust gas circulation tubes 29 , extending inside the casing 27 .
  • the tubes 29 communicate fluidly with the circulation passage 21 through the opening 25 .
  • the casing 27 has a proximal edge 31 , delimiting a proximal opening 33 .
  • the proximal edge 31 and the distal edge 35 have closed contours.
  • the heat exchanger 23 also includes at least one grate 39 , arranged in the proximal opening 33 .
  • the grate 39 comprises a wall 41 in which orifices 43 are arranged.
  • Each tube 29 has a proximal end 45 , arranged in one of the orifices 43 and attached to the grate 39 .
  • the heat exchanger 23 comprises another grate 47 arranged in the distal opening 37 .
  • the other grate 47 comprises a wall 49 in which orifices 51 are arranged.
  • Each tube 29 has a distal end 53 engaged in one of the orifices 51 and attached to the other grate 47 .
  • the grate 39 and the other grate 47 are identical in all points. Only the grate 39 will therefore be described below in detail.
  • the tubes 29 are rectilinear, and extend longitudinally from the proximal end 45 to the distal end 53 .
  • the tubes 29 have, in a transverse plane perpendicular to the longitudinal direction, a substantially rectangular section, constant over the entire longitudinal length of the tube 29 .
  • the section is elongated along a transverse direction T.
  • the longitudinal L and transverse T directions are shown in FIG. 3 .
  • Each tube 29 therefore has two large faces 55 , 57 , opposite one another, and connected to one another by sheared edges 59 .
  • the large faces 55 , 57 extend substantially in planes containing the longitudinal L and transverse T directions. These planes are perpendicular to an elevation direction E, embodied in FIG. 3 .
  • the tubes 29 are all stacked along the elevation direction.
  • the heat exchanger 23 in a transverse plane comprises no more than a single tube.
  • Each tube 29 therefore extends practically over the entire transverse width of the heat exchanger 23 .
  • the tubes 29 are stacked such that the large base 55 of a given tube is placed across from the large base 57 of the tube immediately below it in the stack along the elevation direction.
  • Fins 62 are placed inside each tube 29 to promote heat exchanges on the gas side.
  • the fins 62 are, for example, made in the form of a metal sheet folded in an accordion and inserted inside the tube 29 .
  • the orifices 43 and 51 of the grates 39 and 47 have a shape conjugated with that of the tubes 29 . They therefore have a transversely elongated shape and extend over practically the entire width of the grate. They are arranged in a single column.
  • the grate 39 comprises an upright edge 60 , extending around the wall 41 and protruding from the wall 41 toward the inside of the heat exchanger 23 .
  • the wall 41 is substantially rectangular, with rounded corners.
  • the upright edge 60 includes two segments 61 that are substantially parallel to one another and extend along the transverse direction T, and two segments 63 that are substantially parallel to one another and extend along the elevation direction E.
  • the two segments 61 are parallel to one another and extend along the transverse direction T.
  • the two segments 63 are parallel to one another and extend along the elevation direction E.
  • the segments 61 and 63 are connected to one another by curved portions.
  • the upright edge 60 protrudes along the longitudinal direction L. As shown in FIG. 4 , the upright edge 60 is engaged in said the proximal edge 31 of the casing 27 , the proximal edge 31 being pressed against an outer surface of the upright edge 60 .
  • the upright edge 60 is rigidly attached to the casing 27 . More specifically, the proximal edge 31 is brazed on the upright edge 60 .
  • the wall 41 of the grate 39 is offset toward the outside of the casing 27 .
  • the wall 41 is offset along the longitudinal direction L. This means that the wall 41 is not located inside the casing 27 , but is located longitudinally past the proximal end 31 of the casing 27 .
  • the wall 41 of the grate 39 has, around the orifices 43 , a planar surface 65 turned toward the body 19 .
  • planar surface 65 extends in a determined plane. This plane is perpendicular to the longitudinal direction L and therefore contains the transverse direction T and the elevation direction E.
  • the planar surface 65 extends all around the orifices 43 .
  • the planar surface 65 therefore has a closed contour.
  • This width is taken along a direction perpendicular to a junction line 67 between the upright edge 60 and the wall 41 . In other words, this width is taken along the elevation direction E along the segment 61 of the upright edge 60 , and along the transverse direction T along the segment 63 of the upright edge 60 .
  • the planar surface 65 extends, in the illustrated example, up to the junction line 67 between the upright edge 60 and the wall 41 , i.e., up to the outer edge of the wall 41 .
  • the opening 25 is cut out in a wall of the body 19 .
  • planar zone 68 of the wall preferably with a flatness of less than 0.3.
  • This planar zone 68 delimits, on one side, the inside of the circulation passage 21 , and is therefore in direct contact with the exhaust gases. On the opposite side, it is in contact with the grate 39 of the heat exchanger.
  • the opening 25 of the body 19 is delimited by a flat edge 69 , pressed against the planar surface 65 .
  • the flat edge 69 is therefore in contact on one side with the planar surface 65 , and on the opposite side of the planar surface 65 , with the exhaust gases circulating in the body 19 .
  • planar surface 65 and the flat edge 69 are rigidly attached to one another to be tight with respect to the exhaust gases.
  • planar surface 65 and the flat edge 69 are directly attached to one another.
  • planar surface 65 and the flat edge 69 are rigidly attached to one another by laser welding or by brazing.
  • planar zone 68 does not bear any relief around the flat edge 69 , which makes it possible to adjust the position of the grate 39 relative to the body 19 .
  • the other grate 47 is also mounted on a planar zone, such that it is possible to adjust the positions of both ends of the heat exchanger relative to one another.
  • the flat edge 69 has, toward the heat exchanger 23 , a planar outer surface 71 , pressed against the planar surface 65 .
  • This planar outer surface 71 extends in a plane, said plane being perpendicular to the longitudinal direction L in the illustrated example.
  • the edge 69 has a closed contour and extends all the way around the opening 25 .
  • the opening 25 has a size and shape such that all of the orifices 43 are located in line with said opening 25 .
  • the proximal ends 45 of the tubes 29 protrude past the grate 39 , and penetrate slightly inside the opening 25 , as illustrated in FIG. 5 .
  • the heat exchanger 23 also includes a reinforcing grate 73 , arranged to reinforce the connection between the tubes 29 and the grate 39 . It advantageously includes another reinforcing grate 75 , arranged to reinforce the connection between the tubes 29 and the other grate 47 .
  • the grate 73 and the grate 75 are identical, only the grate 73 therefore being described below.
  • the reinforcing grate 73 is a plate in which apertures 77 have been arranged.
  • the apertures 77 are delimited by necks 79 ( FIG. 5 ) and are each passed through by the proximal end 45 of one of the tubes 29 .
  • the apertures 77 are each placed across from one of the orifices 43 .
  • the necks 79 are brazed on the tubes 29 .
  • the peripheral edge 81 of the reinforcing plate, and the fields 83 located between the apertures 77 are brazed on the inner surface of the wall 41 .
  • proximal edge 31 and the distal edge 35 of the casing 27 are located at the two opposite longitudinal ends thereof.
  • the casing 27 is made in two half-shells 85 , 87 .
  • the half-shells 85 , 87 are secured to one another by brazing, along two longitudinal lines 89 ( FIG. 6 ).
  • Each half-shell 85 , 87 has a U-shaped section in a plane perpendicular to the longitudinal direction L.
  • the casing 27 includes a central tubular part 91 having a first straight section, the proximal opening 33 having a second section greater than the first section ( FIG. 4 ). Likewise, the distal opening 37 has a section greater than the first section, and typically equal to the second section.
  • the proximal edge 31 of the casing 27 is connected to the central tubular part 91 by a tubular segment 93 that flares from the central tubular part 91 .
  • the distal edge 35 of the casing 27 is connected to the central tubular part 91 by another tubular segment 95 that flares from the central tubular part 91 .
  • the tubular segment 93 delimits a heat transfer fluid circulation channel 97 along the grate 39 .
  • the tubular segment 95 delimits a heat transfer fluid circulation channel 98 in contact with the other grate 47 .
  • planar surface 65 of the wall 41 is significantly wider in the invention than in the heat exchanger of FIG. 1 . Indeed, this planar surface 65 is deliberately made wider in the invention, to allow good quality tight attachment of the flat edge 69 on the planar surface 65 .
  • the wall 41 is offset toward the outside of the casing 27 .
  • the wall in which the receiving orifices of the tubes are arranged is placed inside the casing 7 .
  • This large passage section of the circulation channel 97 is particularly advantageous, since it is thus possible to increase the heat transfer fluid flow rate in contact with the grate 39 .
  • the grate 39 is typically located at the exhaust gas inlet inside the heat exchanger. Yet the heat exchangers used in exhaust lines must never come to a boil. The most critical zone with respect to boiling is always located on the exhaust gas inlet side, i.e., in the zone where the exhaust gases are hottest. In case of boiling, the heat transfer fluid turns to vapor, such that the heat exchanges at the inlet of the heat exchanger are gas-gas locally. As a result, the skin temperature of the exchanger increases quickly, and may approach the temperature of the exhaust gases (for example, around 850° C.). This risks locally creating a thermal shock and temperature gradients causing breaks, and therefore leaks, at the brazes securing the various components of the heat exchanger to one another.
  • the casing 27 has a heat transfer fluid inlet 99 and a heat transfer fluid outlet 101 ( FIGS. 3 and 6 ).
  • the heat transfer fluid inlet 99 and outlet 101 are arranged in the half-shell 87 .
  • the heat transfer fluid inlet 99 and outlet 101 are arranged side by side, and offset longitudinally relative to one another.
  • the inlet 99 is located on the side of the grate 39 , and the outlet 101 on the side of the grate 47 .
  • the heat transfer fluid inlet 99 is located toward the exhaust gas inlet and the heat transfer fluid outlet 101 toward the exhaust gas outlet.
  • the heat transfer fluid inlet 99 is located in the central tubular part 91 of the casing 27 .
  • the central tubular part 91 has a zone 103 protruding toward the outside of the casing 27 , extending from the heat transfer fluid inlet 99 to the heat transfer fluid circulation channel 97 , along the grate 39 .
  • the zone 103 is not shown in FIGS. 3 to 5 .
  • the casing 27 has two large faces 105 and 107 , which are substantially perpendicular to the elevation direction E, and two side faces 109 , which are substantially perpendicular to the transverse direction T, and connecting the faces 105 and 107 to one another.
  • the heat transfer fluid inlet 99 and typically the heat transfer fluid outlet 101 , are arranged in one of the side faces 109 .
  • the protruding zone 103 is advantageously arranged on the large face 107 . It has a generally triangular shape, as shown in FIG. 7 . It extends transversely from the heat transfer fluid inlet 99 to the side face 109 opposite the heat transfer fluid inlet 99 . Its width, taken along the longitudinal direction, decreases from the heat transfer fluid inlet 99 toward the side face 109 opposite the heat transfer fluid inlet 99 .
  • the protruding zone 103 protrudes relative to a central zone 111 of the central tubular part 91 over a height substantially equal to that of the proximal end 31 .
  • the protruding zone 103 makes it possible to collect the heat transfer fluid at the heat transfer fluid inlet 99 , and to steer it preferentially toward the circulation channel 97 . This promotes the cooling at the inlet of the heat exchanger and limits the risk of boiling.
  • the casing 27 also includes another protruding zone 112 , extending from the heat transfer fluid outlet 101 to the heat transfer fluid circulation channel 98 along the other grate 47 ( FIG. 7 ).
  • the protruding zone 112 is symmetrical with the protruding zone 103 relative to the median plane of the heat exchanger perpendicular to the longitudinal direction L.
  • the tubes 29 have protuberances 113 forming spacers maintaining a determined spacing between the tubes 29 , and between the tubes 29 and the casing 27 . These protuberances 113 are distributed on the large faces 55 and 57 of the tubes.
  • each of the large faces 55 , 57 has around ten protuberances 113 .
  • the protuberances 113 protrude toward the outside of the tubes 29 . They are obtained by deformation of the metal making up the tube 29 .
  • the protuberances 113 in contact with the casing 27 are all located outside the heat transfer fluid circulation channel 97 along the grate 39 , and typically also outside the heat transfer fluid circulation channel 98 along the other grate 47 .
  • these protuberances are also located outside the protruding zone 103 and outside the protruding zone 112 .
  • the protuberances 113 formed on the large faces 55 of a tube 29 are located across from the protuberances 113 formed on the large faces 57 of said same tube 29 . “Across from” means opposite one another along the elevation direction E. Likewise, the protuberances 113 formed on a given tube 29 are located in the extension of the protuberances 113 of the other tubes 29 along the elevation direction E, as illustrated in FIG. 4 . In other words, all of the tubes 29 have protuberances 113 having the same arrangement on their two opposite large faces 55 , 57 , such that said protuberances 113 form stacks in a column, along the elevation direction E. This is favorable to increasing the rigidity of the heat exchanger 23 .
  • the planar surface 65 of the grate 39 extends in a first plane P 1 , the orifices 43 being surrounded by a ridge 115 adjacent to the planar surface 65 , the ridge 115 extending in a second plane P 2 parallel to the first plane P 1 and offset toward the inside of the heat exchanger 23 relative to the first plane P 1 . This is illustrated in FIG. 8 .
  • the ridge 115 extends over the entire perimeter of the orifices 43 . It has a closed contour, and is inwardly adjacent to the planar surface 65 . It is separated from the planar surface 65 by a step.
  • the brazing material cannot spread over the planar surface 65 . It is retained by the step separating the ridge 115 from the planar surface 65 .
  • the invention relates to the process for manufacturing the heat recovery device 17 described above.
  • This manufacturing process comprises the following steps:
  • the other grate 47 is assembled by brazing to the casing 27 and the tubes 29 .
  • the reinforcing grates 73 , 75 are advantageously assembled by brazing to the tubes 29 and the grates 39 , 47 , in the same step.
  • the assembly step also makes it possible to secure the half-shells 85 , 87 of the casing 27 to one another.
  • the casing 27 is assembled to the grate 39 by brazing of the proximal edge 31 on the upright edge 60 .
  • the tubes 29 are assembled to one another by brazing, said brazing preferably being done at the protuberances 113 .
  • the tubes 29 are assembled to the casing 27 by brazing of the protuberances 113 on the casing 27 , and more specifically on the central tubular part 91 of the casing 27 .
  • the brazing step is advantageously done in a furnace.
  • the weld line has a closed contour, and extends over the entire perimeter of the opening 25 .
  • brazing paste is deposited between the flat edge 69 and the planar surface 65 .
  • the brazing paste is melted, for example, by placing the body 19 and the heat exchanger 23 in a furnace.
  • the brazing of the planar surface 65 and the flat edge 69 can be done at the same time as the assembly by brazing of the different elements of the heat exchanger to one another.
  • the heat recovery device 17 and the corresponding manufacturing process, can assume multiple variants.
  • the grate 47 arranged in the distal opening 37 of the casing 27 could be of a different type from that arranged in the proximal opening 33 .
  • the tubes 29 do not necessarily have the shape described above. They could a circular section, an oval section, or any other appropriate section. These tubes are not necessarily rectilinear, but alternatively are curved. In this case, the distal opening 37 of the casing 27 is not necessarily placed longitudinally across from the proximal opening 33 .
  • the heat transfer fluid is typically a liquid. Alternatively, it is another type of fluid.
  • the heat exchanger 23 is not necessarily symmetrical relative to a median transverse plane of the heat exchanger. It may not include a circulation channel 98 of the heat transfer fluid in contact with the other grate 47 and/or not include a protruding zone 112 .
  • the wall 41 of the grate 39 may have all types of shapes. It is not necessarily rectangular. Alternatively, the wall 41 is circular, or elliptical, or has any other appropriate shape.
  • the opening 25 arranged in the body 19 also does not have a rectangular shape. It typically has a shape corresponding to the shape of the grate 39 , and more particularly to the shape of the wall 41 .
  • the upright edge 60 is not necessarily engaged inside the proximal edge 31 of the casing 27 .
  • the casing 27 is not necessarily made up of two half-shells 85 , 87 assembled to one another. It could be obtained by rolling a metal sheet around the longitudinal axis, or by deforming a tube segment.
  • the tubes 29 may be arranged in all types of different ways inside the heat exchanger 23 . In particular, it is possible to place several tubes 29 next to one another transversely and not just one as described above.
  • the planar surface 65 does not necessarily extend in a single plane. It may include several planar zones, arranged in several planes parallel to one another or tilted relative to one another. In these cases, the flat edge 69 has substantially the same shape as the planar surface 65 . In any case, the flat edge 69 and the planar surface 65 are in contact with one another over a zone with a closed contour surrounding the opening 25 and surrounding all of the orifices 43 , 51 . This zone is wide enough to allow the attachment of the planar surface 65 and the flat edge 69 to one another, preferably by laser welding or by brazing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US16/218,698 2017-12-15 2018-12-13 Heat recovery device and corresponding manufacturing process Abandoned US20190186324A1 (en)

Applications Claiming Priority (2)

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FR1762294 2017-12-15
FR1762294A FR3075343B1 (fr) 2017-12-15 2017-12-15 Dispositif de recuperation de chaleur et procede de fabrication correspondant

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US20210131748A1 (en) * 2019-11-05 2021-05-06 Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. Heat exchange tube and heat exchanger having the same

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US20030010479A1 (en) * 2001-07-10 2003-01-16 Takayuki Hayashi Exhaust gas heat exchanger
US20090010479A1 (en) * 2007-07-04 2009-01-08 Chi Mei Communication Systems, Inc. Portable electronic device with movable speaker device
US20170016684A1 (en) * 2014-03-07 2017-01-19 T.Rad Co., Ltd. Seal structure for tank

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JP3903869B2 (ja) * 2001-07-26 2007-04-11 株式会社デンソー 排気熱交換器
DE10214467A1 (de) * 2002-03-30 2003-10-09 Modine Mfg Co Abgaswärmetauscher für Kraftfahrzeuge
JPWO2003102486A1 (ja) * 2002-05-31 2005-09-29 株式会社ゼクセルヴァレオクライメートコントロール 熱交換器
DE102004045021B4 (de) * 2004-09-15 2013-07-11 Behr Gmbh & Co. Kg Wärmetauscher für Verbrennungsmotoren
JP4817879B2 (ja) * 2006-02-23 2011-11-16 マルヤス工業株式会社 熱交換器
DE102009013535A1 (de) * 2009-03-19 2010-09-23 Behr Gmbh & Co. Kg Thermoelektrische Vorrichtung
FR2997485B1 (fr) * 2012-10-25 2018-09-14 Valeo Systemes Thermiques Echangeur thermique, notamment pour vehicule automobile
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US6293337B1 (en) * 1998-07-24 2001-09-25 Modine Manufacturing Company Exhaust gas heat exchanger
US20030010479A1 (en) * 2001-07-10 2003-01-16 Takayuki Hayashi Exhaust gas heat exchanger
US20090010479A1 (en) * 2007-07-04 2009-01-08 Chi Mei Communication Systems, Inc. Portable electronic device with movable speaker device
US20170016684A1 (en) * 2014-03-07 2017-01-19 T.Rad Co., Ltd. Seal structure for tank

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210131748A1 (en) * 2019-11-05 2021-05-06 Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. Heat exchange tube and heat exchanger having the same
US11512907B2 (en) * 2019-11-05 2022-11-29 Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. Heat exchange tube and heat exchanger having the same

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KR102150984B1 (ko) 2020-09-02
FR3075343B1 (fr) 2020-01-10
JP6759319B2 (ja) 2020-09-23
JP2019109038A (ja) 2019-07-04
KR20190072468A (ko) 2019-06-25
EP3499165A1 (fr) 2019-06-19
FR3075343A1 (fr) 2019-06-21

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