EP3106823B1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
EP3106823B1
EP3106823B1 EP16168940.1A EP16168940A EP3106823B1 EP 3106823 B1 EP3106823 B1 EP 3106823B1 EP 16168940 A EP16168940 A EP 16168940A EP 3106823 B1 EP3106823 B1 EP 3106823B1
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EP
European Patent Office
Prior art keywords
wave
shaped
heat transfer
transfer device
support
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.)
Active
Application number
EP16168940.1A
Other languages
German (de)
English (en)
Other versions
EP3106823A1 (fr
Inventor
Harald Bronner
Walter Demuth
Jochen HÄUSSERMANN
Volker Kurz
Eberhard Pantow
Jens Ruckwied
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP3106823A1 publication Critical patent/EP3106823A1/fr
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Publication of EP3106823B1 publication Critical patent/EP3106823B1/fr
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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
    • 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
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0131—Auxiliary supports for elements for tubes or tube-assemblies formed by 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
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/053—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 tubular conduits the conduits being straight
    • F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • 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
    • 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
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • 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
    • F28D2021/0091—Radiators
    • F28D2021/0094—Radiators for recooling the engine coolant
    • 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
    • F28F2225/04—Reinforcing means for conduits
    • 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

Definitions

  • the present invention relates to a heat exchanger with a heat exchanger block with flat tubes, which are each held longitudinally in a passage of an associated tube plate, according to the preamble of claim 1.
  • the invention also relates to a motor vehicle equipped with such a heat exchanger.
  • a heat exchanger in particular for a motor vehicle, known, with a heat exchanger block with flat tubes, which are each held along the end in a passage of an associated tube sheet.
  • Each passage has two opposite and substantially straight longitudinal sides and two opposite narrow sides, wherein each flat tube is soldered to the longitudinal sides and the narrow sides of the passage.
  • Between the longitudinal side and the narrow side a boundary of a fürzugseck Kunststoffs is formed.
  • the boundary of the fürzugseck Netzs has a straight course to a base plane spanned by the longitudinal side or is curved over the base plane spanned from the longitudinal side of the base plane formed to the base plane.
  • a heat exchanger for exchanging heat between a first fluid and a second fluid which has a block for the separate and heat-transmitting guidance of the first and second fluids.
  • the heat exchanger block comprises flat tubes, which are held with their longitudinal end sides in passages of tube sheets.
  • the passages in this case have at least one, from a plane substantially perpendicular to the Rohrachsraum plane, curved away and at a distance from said plane extending boundary contour, wherein a distance value is at least at a transition between the pipe narrow side and the pipe broadside so less than a distance value at the Pipe wide side that stresses in the transition area can be reduced.
  • the durability of the heat exchanger should be able to be increased.
  • each longitudinally in a passage of an associated Tube bottom are held.
  • Each passage has two opposite and substantially straight longitudinal sides and two opposite narrow sides, wherein each flat tube is soldered to the longitudinal sides and the narrow sides of the passage.
  • the present invention therefore deals with the problem of providing a heat exchanger of the generic type an improved or at least one alternative embodiment, which is characterized in particular in thin-walled flat tubes with at least one partition by an increased fatigue strength in the partition wall area.
  • the present invention is based on the general idea of forming at least one longitudinal side, preferably both longitudinal sides, of the passage in the region of a soldering surface between a flat tube and a passage in a tubesheet, for example by means of corresponding straps or the introduction of depressions, which later becomes between the solder surface resulting at least one longitudinal side of the passage and the flat tube has a soldering edge or a soldering edge with a wave-shaped course, wherein a high point of the wave-shaped course of the soldering line coincides with a partition, in particular with a fold, of the respective flat tube, whereby a significantly increased Thermal shock resistance can be achieved, which has been confirmed for example by FEM calculations.
  • the heat exchanger according to the invention has for this purpose in a known manner to a heat exchanger block with flat tubes, which are each held along the longitudinal end in a passage of the associated tube sheet.
  • Each passage has two opposite and in the Essentially straight longitudinal sides and two opposite narrow sides.
  • each flat tube is soldered to the long sides and the narrow sides of the passage.
  • at least one solder joint between at least one of the longitudinal sides of at least one passage and a flat tube arranged therein has a wavy soldering boundary formed by wave-shaped recesses which, in the case of flat tubes soldered in the passages, have an equally undulating course of the soldering limit in this region, ie along the associated longitudinal side, generate.
  • the wave-shaped soldering boundary which of course has high points and low points, is now aligned with the at least one partition wall of the flat tube such that the soldering limit in the region of the at least one partition, in particular of the at least one fold, is a high point and thus, in particular, a free edge of the passage has reduced width.
  • a significant reduction in voltage in the partition wall area can be achieved, which corresponds to a significant life extension under temperature load.
  • a significantly increased temperature resistance of the heat exchanger can be achieved by the inventive design of at least one of the longitudinal sides of a passage with the resulting wavy Lötgrenze and the alignment of the high points of the wave soldering border on the partition wall of the flat tube.
  • At least one of the longitudinal sides of at least one passage has wave-shaped depressions, the wave-shaped edge of which forms the corresponding undulating soldering edge of the solder joint between the at least one passage and the flat tube arranged therein, wherein the undulating soldering boundary extends at a distance to a free edge of the passage and with limited to the free edge of a soldering surface, whose width b is reduced in particular in the region of the fold or the partitions.
  • this results in a soldered surface which closes upwards rectangular to the free edge of the passage and down by means of the wave-shaped Along the solder boundary or the soldering edge, which not only a large-scale and thus reliable soldering can be created, but also by the special invention wavy course of Lötalia with arrangement of a high point in the region of at least one partition, in particular of at least one fold, the flat tube an extremely temperature resistant.
  • the wave-shaped solder limit has a number of partitions corresponding number
  • the soldering limit in the region of the high point and / or the low point has two flanks angled away from each other at an angle ⁇ of 7 ° ⁇ ⁇ ⁇ 30 ° to a horizontal. Depending on the selected angle, a flatter or steeper course of the soldering limit can be achieved in conjunction with the wavelength.
  • the soldering boundary between the high point and the low point has a height difference h of 1.5 mm ⁇ h ⁇ 2.5 mm.
  • the wave-shaped soldering limit has a wavelength l of 4.0 mm ⁇ l ⁇ 26.0 mm. This range already suggests that, in particular for heat exchangers of different sizes, the wavelength l of the wave-shaped soldering boundary can be easily adapted to the respective size of the flat tube or of the passage.
  • the wave-shaped soldering boundary goes over a high point in the narrow side of the Passage over.
  • the narrow side can be arranged at right angles to the two longitudinal sides, or else be formed semicircular, with a higher voltage pickup is possible by going over the wave-shaped solder border over a high point in the narrow side. Since, in particular, these corner regions are exposed to high stresses under a temperature load, the service life of the heat exchanger according to the invention can likewise be prolonged as a result.
  • a heat exchanger 1 according to the invention, which may be used for example as a coolant radiator in a motor vehicle 2, a heat exchanger block 3 with flat tubes 4, each longitudinally in a passage 5 (see also Fig. 2 to 4 ) of an associated tube plate 6 are held.
  • Each passage 5 has two opposite and substantially straight longitudinal sides 7 and two also opposite narrow sides 8, the latter may be formed, for example, semicircular.
  • Each of the flat tubes 4 is soldered over a part of its outer surface with the longitudinal sides 7 and the narrow sides 8 of an associated passage 5.
  • the wave-shaped solder border 12 can also by correspondingly shaped tabs 21 (see. Fig. 5 ) be formed.
  • solder can be applied to the passage 5 as well as to the ends of the flat tubes 4 as well as to both be, for example, by a Lotplattmaschine.
  • the at least one flat tube 4 has at least one partition wall 10, wherein the soldering boundary 12 in the region of the at least one partition wall 10 has a high point 13 and thus a reduced width b to a free edge 15 of the passage 5.
  • a line / plane 20 running through two opposite groove bottoms 19, 19 'of the tube bottom 6 can be used as reference, so that in this case the soldering boundary 12 in the region of the at least one partition 10 has a high point 13 and thus a to an extending through two opposite groove bases 19,19 'of the tube sheet 6 extending line / plane 20 increased width c.
  • both longitudinal sides 7 of the at least one passage 5 have the wave-shaped soldering boundaries 12 and / or the wave-shaped depressions 11.
  • the soldering limit 12 is in the Fig. 2 to 4 not immediately presented, but their position indicated.
  • the partition wall 10 may be formed as a fold 9, in particular if the flat tube 4 is formed as a folded flat tube 4.
  • the flat tube 4 may be formed as a welded bar tube or extruded tube, that is to say extruded flat tube 4.
  • a partition wall 10 can thus also be a web or produced by extrusion during extrusion together with the flat tube 4.
  • the wave-shaped edge of the recesses 11 may have a regularly repeating course in terms of amplitude and / or wavelength.
  • the wavy edge of the recesses 11 may have a mathematically unsteady course.
  • the wave-shaped soldering edge 12 or the wave-shaped depressions 11 are arranged in the exemplary embodiment on an insertion side 17 of the longitudinal side 7 of the passage 5 of the tube bottom 6.
  • the respective insertion sides 17 of the passages 5 are facing away from a collecting box 18 of the heat exchanger 1 (cf. Fig. 1 ) and thus facing a longitudinal pipe center of the arranged in the passage 5 flat tube 4.
  • the wave-shaped course of the soldering boundary 12 and in particular the congruent arrangement of the high points 13 of the soldering boundary 12 with the partitions 10 and the fold 9 lead to a significant reduction of the stresses in this area under temperature load, whereby a significantly increased thermal shock resistance of the heat exchanger 1 can be achieved
  • FEM calculations have shown with the geometries described that a means of the inventively designed and with respect to the fold 9 and the partition 10 aligned course of the solder boundary 12 means a significant voltage reduction and thus a significant life extension under temperature load.
  • Another great advantage of the wave-shaped solder border 12, formed by, for example, the depressions 11 or indentations, lies in the simple insertion of the flat tubes 4 into the passages 5 without the risk of tilting.
  • the wave-shaped depressions 11 can also form an insertion bevel, in particular also in the region of the low points 14, which facilitates the insertion of the flat tube 4 into the associated passage 5.
  • the wave-shaped solder border 12 extends at a distance from the free edge 15 of the passage 5. It thus limits with the free edge 15 a soldering surface whose width b is reduced in particular in the region of the fold 9 or the partitions 10.
  • the high point 13 also has a width c extended to a line / plane 20 running through two opposite groove bottoms 19, 19 'of the tube bottom 6 (cf. Fig. 3 to 6 ).
  • the free edge 15 may be formed in a straight line, or also has a slightly curved course, as for example according to the Fig. 4 is shown. According to the Fig.
  • the wavy edge of the wave-shaped depressions 11 also has a high point 13 in this first section.
  • the free edge 15 also extends slightly in a corner region at the transition to the narrow side 8.
  • the wave-shaped edge of the wave-shaped depressions 11 has a high point 13. while there is a course of the wave-shaped edge of the wave-shaped depressions 11 with a low point 14 between these two sections.
  • solder limit 12 which runs along the wave-shaped edge of the wave-shaped depressions 11, according to the 3 and 4 , it can be seen that this has in the region of the high point 13 and / or the low point 14 two to the horizontal and in each case by an angle ⁇ of 7 ° ⁇ ⁇ ⁇ 30 ° angled flanks 16, 16 '.
  • the soldering limit 12 itself may in all embodiments between the high point 13 and the low point 14 have a height difference h of 1.5 mm ⁇ h ⁇ 2.5 mm, and a wavelength l of 4.0 ⁇ l ⁇ 26 mm.
  • the wave-shaped solder border 12 passes over a high point 13 in the narrow side 8 of the passage 5. As a result, a reduction of the stress in the rounded transition region between the longitudinal side 7 on the one hand and the narrow side 8 on the other hand is possible.
  • the wave-shaped soldering boundary 12 is the edge of the wave-shaped section of the soldering surface, in particular of the tabs 21, but without an area beyond the soldering border 12 or soldering surface, in particular without adjacent recesses.
  • a plateau 22 forming, soldering boundary portion 23 is provided in the region of at least one high point 13 of the soldering boundary 12 a straight.
  • This plateau 22 has a length a 1 .
  • the length a 1 is preferably between 2 and 3 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (12)

  1. Échangeur de chaleur (1) avec un bloc échangeur de chaleur (3) avec des tuyaux plats (4) qui sont maintenus à chaque fois du côté de l'extrémité longitudinale dans une traverse (5) d'un fond de tuyau (6) associé,
    dans lequel chaque traverse (5) comporte deux côtés longs (7) opposés et globalement droits et deux côtés étroits (8) opposés
    et dans lequel chaque tuyau plat (4) est soudé aux côtés longs (7) et aux côtés étroits (8) de la traverse (5),
    - dans lequel une liaison soudée entre au moins l'un des côtés longs (7) d'au moins une traverse (5) et un tuyau plat (4) agencé à l'intérieur a une limite de soudure (12) ondulée,
    - dans lequel au moins un tuyau plat (4) a au moins une paroi séparatrice (10),
    - dans lequel la limite de soudure (12) a, dans la zone de l'au moins une paroi séparatrice (10), un point haut (13) et donc une largeur c plus grande par rapport à une ligne/plan (20) passant par deux fonds de rainure opposés (19, 19') du fond de tuyau (6),
    caractérisé en ce que
    - au moins un des côtés longs (7) d'au moins une traverse (5) a des creux (11) ondulés, leur bord ondulé formant la limite de soudure (12) ondulée correspondante de la liaison soudée entre l'au moins une traverse (5) et le tuyau plat (4) agencé à l'intérieur,
    - la limite de soudure (12) ondulée s'étend à une certaine distance d'un bord libre (15) de la traverse (5) et délimite avec le bord libre (15) une surface de soudure dont la largeur b est réduite en particulier dans la zone du pli (9) ou des parois séparatrices (10).
  2. Échangeur de chaleur selon la revendication 1, caractérisé en ce que la limite de soudure (12) comporte, dans la zone du point haut (13) et/ou d'un point bas (14), deux flancs (16, 16') repliés d'un angle α de 7°≤ α ≤30° par rapport à l'horizontale.
  3. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que
    - au moins un tuyau plat (4) est réalisé sous forme de tuyau plat (4) plié et l'au moins une paroi séparatrice (10) est réalisée sous forme de pli (9), ou
    - au moins un tuyau plat (4) est réalisé sous forme de tuyau plat (4) soudé, ou
    - au moins un tuyau plat (4) est réalisé sous forme de tuyau plat (4) extrudé.
  4. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que la limite de soudure (12) a entre le point haut (13) et le point bas (14) une différence de hauteur h de 1,5 mm ≤ h ≤ 2,5 mm.
  5. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que la limite de soudure (12) ondulée a une longueur d'onde l de 4,0 mm ≤ l ≤ 26,0 mm.
  6. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que la limite de soudure (12) ondulée passe au-delà d'un point haut (13) dans le côté étroit (8) de la traverse (5).
  7. Échangeur de chaleur selon l'une des revendications 1 à 6, caractérisé en ce que la limite de soudure (12) ondulée ou les creux (11) ondulés et la limite de soudure (12) ondulée sont agencés au niveau d'un côté d'introduction (17) pour le tuyau plat (4) au niveau d'au moins un côté long (7) de la traverse (5) du fond de tuyau (6), le côté d'introduction (17) respectif de la traverse (5) étant proche du milieu de tuyau, côté long, du tuyau plat (4) agencé dans la traverse (5).
  8. Échangeur de chaleur selon l'une des revendications 1 à 7, caractérisé en ce que les deux côtés longs (7) de l'au moins une traverse (5) présentent les limites de soudure (12) ondulées et/ou les creux (11) ondulés.
  9. Échangeur de chaleur selon l'une des revendications précédentes, caractérisé en ce que la limite de soudure (12) ondulée a un nombre de points hauts (13) qui correspond au nombre de parois séparatrices (10).
  10. Échangeur de chaleur selon l'une des revendications 1 à 9, caractérisé en ce que les creux (11) ondulés forment un biseau d'introduction.
  11. Échangeur de chaleur selon l'une des revendications 1 à 10, caractérisé en ce que, dans la zone d'au moins un point haut (13) de la limite de soudure (12), il est prévu un tronçon de limite de soudure (23) droit formant un plateau (22).
  12. Véhicule automobile (2) avec au moins un échangeur de chaleur (1) selon l'une des revendications précédentes.
EP16168940.1A 2015-05-19 2016-05-10 Échangeur de chaleur Active EP3106823B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015209130.9A DE102015209130A1 (de) 2015-05-19 2015-05-19 Wärmeübertrager

Publications (2)

Publication Number Publication Date
EP3106823A1 EP3106823A1 (fr) 2016-12-21
EP3106823B1 true EP3106823B1 (fr) 2018-07-18

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Family Applications (1)

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EP16168940.1A Active EP3106823B1 (fr) 2015-05-19 2016-05-10 Échangeur de chaleur

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Country Link
US (1) US11002494B2 (fr)
EP (1) EP3106823B1 (fr)
DE (1) DE102015209130A1 (fr)

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US20220333873A1 (en) * 2019-09-20 2022-10-20 T.Rad Co., Ltd. Brazing structure for flat tube and header plate of heat exchanger
JPWO2022071607A1 (fr) * 2020-10-02 2022-04-07

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US20160341494A1 (en) 2016-11-24
EP3106823A1 (fr) 2016-12-21
DE102015209130A1 (de) 2016-11-24
US11002494B2 (en) 2021-05-11

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