WO2021261878A1 - Matériau de plaque pour tube d'échangeur de chaleur, tube d'échangeur de chaleur comprenant ledit matériau, et procédé de fabrication associé - Google Patents

Matériau de plaque pour tube d'échangeur de chaleur, tube d'échangeur de chaleur comprenant ledit matériau, et procédé de fabrication associé Download PDF

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Publication number
WO2021261878A1
WO2021261878A1 PCT/KR2021/007800 KR2021007800W WO2021261878A1 WO 2021261878 A1 WO2021261878 A1 WO 2021261878A1 KR 2021007800 W KR2021007800 W KR 2021007800W WO 2021261878 A1 WO2021261878 A1 WO 2021261878A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
exchanger tube
plate
layer
plate material
Prior art date
Application number
PCT/KR2021/007800
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English (en)
Korean (ko)
Inventor
김동배
이동석
고동현
Original Assignee
한온시스템 주식회사
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.)
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Publication date
Application filed by 한온시스템 주식회사 filed Critical 한온시스템 주식회사
Publication of WO2021261878A1 publication Critical patent/WO2021261878A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/089—Coatings, claddings or bonding layers made from metals or metal alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0012—Brazing heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/226—Non-corrosive coatings; Primers applied before welding
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof

Definitions

  • the present invention relates to a plate for a heat exchanger tube, a heat exchanger tube, and a method for manufacturing the same, wherein different layers are formed on one side and the other side of a base material to reduce residual flux in the tube while increasing manufacturability and productivity will be.
  • the heat exchanger is responsible for cooling or heating by heat exchange with external air while the state of the heat exchange medium changes.
  • the heat exchanger includes a pair of header tanks spaced apart from each other and provided in parallel, a tube having both ends fixed to the pair of header tanks to form a heat exchange medium flow path, and a fin interposed between the tubes.
  • an inner pin may be further provided inside the tube.
  • the tube may be manufactured by an extrusion method and a folding method of the plate material, and the tube of the folding method has the advantage of good productivity compared to the extrusion method.
  • the tube of the folding method of the plate material is provided with an inner pin inside and joined by brazing, but the method in which vacuum brazing is performed in a vacuum deteriorates manufacturability, so the CAB (Controlled Atmosphere Brazing) method is used. have.
  • a clad material impregnated with flux is applied in advance to prevent such oxidation.
  • the flux is to prevent re-oxidation, and is first melted at a lower temperature than that of the clad material to form a kind of coating film that protects the aluminum surface from oxygen, thereby preventing re-oxidation.
  • Patent Document 0001 Japanese Patent Laid-Open No. 2005-214511 (Title of the invention: heat exchanger)
  • the present invention has been devised to solve the above-described problems, and an object of the present invention is to increase manufacturability and productivity while reducing residual flux in the tube by forming different layers on the outer and inner surfaces of the base material. It is to provide a plate material for a heat exchanger tube that can be used, a heat exchanger tube, and a method for manufacturing the same.
  • an outer clad layer made of a clad material impregnated with flux
  • an inner cladding layer to reduce residual flux inside the tube to regulate the cleanliness level inside the tube
  • an object of the present invention is to increase manufacturability because it is not necessary to separately apply flux when performing the CAB process. is to provide a plate material for a heat exchanger tube, a heat exchanger tube, and a method for manufacturing the same, which can increase the bonding performance inside the tube for the heat exchanger by being controlled at a lower level of 10 to 30 ppm.
  • the plate material for a heat exchanger tube of the present invention includes a base material; an outer clad layer laminated on one side of the base material; and an inner cladding layer laminated on the other side of the base material.
  • the outer cladding layer and the inner cladding layer may be formed of metal layers of different materials.
  • the base material may be an aluminum material
  • the outer clad layer may be a clad material including a flux material
  • the inner cladding layer may be a cladding material containing a specific metal alloy component.
  • a flux material may not be included in the inner cladding layer.
  • the inner cladding layer includes a first layer stacked in contact with the other side of the base material and a second layer stacked in contact with the other side of the first layer, and the specific included in the first layer and the second layer
  • the metal alloy components may be different from each other.
  • the specific metal alloy component may be any one or more selected from magnesium (Mg), bismuth (Bi), and lithium (Li).
  • the first layer may include magnesium (Mg), bismuth (Bi), and lithium (Li)
  • the second layer may include bismuth (Bi) and lithium (Li).
  • the inner cladding layer is a cladding material, and an oxide film may be formed on the other side of the inner cladding layer.
  • the oxide film may be formed to have a thin thickness through chemical treatment to a thickness that can be broken during brazing.
  • the sum of the thickness of the outer cladding layer and the inner cladding layer may be formed to be less than 50% of the total thickness of the plate material for the heat exchanger tube.
  • the heat exchanger tube of the present invention includes the plate material for the heat exchanger tube and an inner fin, wherein the plate material for the heat exchanger tube is bent so that the inner clad layer is located on the inside and the outer clad layer is located on the outside, and the heat exchanger An inner pin may be disposed on the inside of the plate material for the tube.
  • bent plate for the heat exchanger tube and the inner fin, adjacent or contacting each other may be joined by brazing.
  • the method for manufacturing a heat exchanger tube of the present invention includes the steps of preparing the plate material for the heat exchanger tube and the plate material for the inner fin (S11, S12); A temporary assembling step (S20) of bending and temporarily assembling the plate for the heat exchanger tube and the plate for the inner fin; And it may include a brazing step (S30).
  • the brazing step (S30) may use a CAB (Controlled Atmosphere Brazing) method.
  • the oxygen concentration outside the bent heat exchanger tube plate material is controlled to 80ppm to 100ppm, and the oxygen concentration inside the bent heat exchanger tube plate material can be controlled to 10ppm to 30ppm have.
  • the flux material may not be applied to the pre-assembled plate for the heat exchanger tube and the plate for the inner fin.
  • the plate material for a heat exchanger tube, the heat exchanger tube, and the method for manufacturing the same of the present invention provide an outer clad layer made of a clad material impregnated with flux on the outside of the tube to secure bonding performance and reduce residual flux inside the tube.
  • the plate material for a heat exchanger tube, the heat exchanger tube, and the method for manufacturing the same of the present invention do not need to separately apply a flux during the CAB process, so it is possible to increase the manufacturability, and the oxygen concentration in the furnace is suitable for the CAB process.
  • the oxygen concentration in the tube is lower than this is controlled to 10ppm to 30ppm, there is an advantage that can increase the bonding performance inside the tube for a heat exchanger.
  • FIG. 1 is a view showing a heat exchanger tube according to the present invention.
  • FIG. 2 is a view showing a plate material for a heat exchanger tube according to the present invention.
  • FIG 3 is another view showing a plate material for a heat exchanger tube according to the present invention.
  • FIGS. 4 and 5 are another view showing a plate material for a heat exchanger tube according to the present invention and an enlarged view thereof.
  • FIG. 6 is a step diagram showing a method for manufacturing a heat exchanger tube according to the present invention.
  • FIG. 7 is a photograph showing a state after performing a temporary assembling step in the method for manufacturing a heat exchanger tube according to the present invention.
  • FIG. 8 is a photograph showing a state after performing the brazing step in the method for manufacturing a heat exchanger tube according to the present invention.
  • FIG. 1 is a view showing a heat exchanger tube 1000 according to the present invention
  • FIG. 2 is a view showing a plate material 100 for a heat exchanger tube according to the present invention
  • FIG. 3 is a plate material for a heat exchanger tube according to the present invention.
  • (100) is another view
  • FIGS. 4 and 5 are another view showing the plate material 100 for a heat exchanger tube according to the present invention and an enlarged view thereof.
  • the heat exchanger tube 1000 of the present invention is composed of a plate material 100 and an inner fin 200 for a heat exchanger tube. And the plate material 100 for a heat exchanger tube is bent so that the inner clad layer is located on the inside and the outer clad layer is located on the outside, and the inner fin 200 can be disposed on the inside of the plate material 100 for the heat exchanger tube.
  • the plate material 100 for a heat exchanger tube of the present invention is a base material 110, a layer formed on one side (outer side) of the base material 110 (hereinafter referred to as the outer cladding layer 120), and is joined to an inner fin A layer formed on the other side (inner side) (hereinafter, the inner cladding layers 130 and 140) is included, but the outer cladding layer 120 and the inner cladding layers 130 and 140 have different properties.
  • the base material 110 may be an aluminum material.
  • the outer clad layer 120 is made of a clad material 121 including a flux material 122 , and is formed on the outer surface of the base material 110 , which is less likely to cause problems due to residual flux material 122 . to ensure sufficient bonding.
  • the clad material 121 may be manufactured by a powder metallurgy method of compression molding into a sheet material using a powder-type raw material containing aluminum as a main component and then sintering at a temperature below the melting point.
  • the clad layer 120 is formed by mixing the powdered flux material 122 with the powdered raw material constituting the clad material 121, compression molding to form a plate, and then sintering to produce the outer clad layer 120.
  • the outer clad layer 120 may be manufactured in a state in which the outer clad layer 120 is bonded to the base material 110 by being pressed by hot rolling or welding while being laminated on the base material 110 .
  • the outer cladding layer 120 uses the clad material 121 including the flux material 122, a process of additionally applying flux during a subsequent brazing process I don't need this.
  • the inner cladding layer 130 may be formed on the inner surface of the base material 110 to reduce residual flux while ensuring durability.
  • the inner clad layer 130 may be manufactured by compression molding into a sheet form using a powder-type raw material containing aluminum as a main component and then sintering at a temperature below the melting point, and the inner cladding layer 130 manufactured by a powder metallurgy method. ) may be manufactured in a state in which the inner clad layer 130 is bonded to the base material 110 by being pressed by hot rolling or welding in a laminated state on the base material 110 .
  • the inner surface of the base material 110 is defined as a surface to which the inner pin is bonded among both sides of the plate-shaped base material 110 .
  • the inner cladding layer 130 may be formed of a cladding material including a specific metal alloy component.
  • the metal alloy may be any one or more selected from magnesium (Mg), bismuth (Bi), and lithium (Li), and the inner cladding layer 130 is formed as a single layer as shown in FIG. 2 . It may be formed, or may include a first layer 131 and a second layer 132 as shown in FIG. 3 .
  • the first layer 131 may include magnesium (Mg), bismuth (Bi), and lithium.
  • the second layer 132 may be made of a cladding material containing (Li), and the second layer 132 may be formed of a cladding material containing bismuth (Bi) and lithium (Li).
  • the plate material 100 for the heat exchanger tube has an inner clad layer 140 and an oxide film 150 made of a clad material on the other side of the base material 110 .
  • the oxide film 150 has a thin thickness through chemical treatment to a thickness that can be broken during brazing.
  • the inner cladding layer 140 is made of aluminum powder by powder metallurgy, and the oxide film 150 is alumina (Al 2 O 3 ) having a very high hardness and a high melting point. Since melting of the clad layer 140 may be inhibited, the thickness T2 of the oxide layer 150 is relatively thinner than that of the oxide layer 150 through chemical treatment such as etching.
  • the heat exchanger tube 1000 of the present invention forms an outer clad layer 120 made of a clad material including a flux material 122 on the outside of the base material 110 in direct contact with oxygen to secure bonding performance.
  • a technology different from that of the outer cladding layer 120 may be used for the inner cladding layers 130 and 140 in which the oxygen concentration is lower than that of the outside because it is not in direct contact with oxygen in a closed space. That is, a technique of using a clad material including a specific metal alloy component as shown in FIG. 3 or a technique of controlling the thickness of the oxide film 150 through chemical treatment as shown in FIGS. 4 and 5 is applied to the inner cladding layers 130 and 140 . Therefore, sufficient bonding can be performed at a relatively low oxygen concentration, and internal cleanliness regulation can be satisfied because flux is not used.
  • the sum of the thicknesses of the outer cladding layer 120 and the inner cladding layers 130 and 140 may be formed to be 50% or less of the total thickness of the plate material 100 for the heat exchanger tube. That is, the thickness of the base material 110 must be secured at least 50% or more, and it is advantageous in terms of durability when the thickness of the base material is secured as much as possible.
  • the heat exchanger tube manufacturing method according to the present invention as shown in Figure 6, the preparation steps (S11, S12); provisional assembly step (S20); and a brazing step (S30).
  • the preparation steps S11 and S12 are steps of preparing the plate material 100 for the heat exchanger tube and the plate material 200 for the inner fin, and the plate material 100 for the heat exchanger tube has the same characteristics as described above.
  • the provisional assembling step (S20) is a step of temporarily assembling by bending the plate material 100 for the heat exchanger tube and the plate material 200 for the inner fin.
  • the temporarily assembled plate material for a heat exchanger tube 100 and an inner fin plate 200 are heated while maintaining a specific oxygen concentration in a furnace to melt the clad material. (100) and the plate material 200 for the inner pin may be bonded to each other.
  • the brazing step is preferably using a CAB (Controlled Atmosphere Brazing) method.
  • the oxygen concentration in the furnace is controlled to 80 ppm to 100 ppm suitable for the Controlled Atmosphere Brazing (CAB) method, which is the same as the oxygen concentration outside the heat exchanger tube 1000 .
  • CAB Controlled Atmosphere Brazing
  • the internal oxygen concentration of the heat exchanger tube 1000 is controlled to be 10 ppm to 30 ppm lower than the external in a closed system, and the heat exchanger tube manufacturing method of the present invention is shown in FIG. 3 to increase bonding performance at a low oxygen concentration.
  • a plate material 100 for a heat exchanger tube is prepared by using a clad material containing a specific metal alloy component, or by controlling the thickness of the oxide film 150 through chemical treatment, as shown in FIGS. 4 and 5 . do.
  • FIG. 7 is a photograph showing the state after performing the provisional assembling step in the method for manufacturing a heat exchanger tube according to the present invention
  • FIG. 8 is a photograph showing the state after performing the brazing step in the method for manufacturing a heat exchanger tube according to the present invention.
  • the plate material for the heat exchanger tube and the inner fin therein are firmly joined. That is, in the plate material for a heat exchanger tube, the heat exchanger tube, and the method for manufacturing the same of the present invention, different layers are formed on one side and the other side of the base material, thereby reducing residual flux in the tube and increasing manufacturability and productivity.
  • 110 base material
  • 120 outer cladding layer
  • first layer 132: second layer
  • 140 inner cladding layer
  • T1 thickness of oxide film before chemical treatment
  • T2 thickness of oxide film after chemical treatment

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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)

Abstract

La présente invention concerne un matériau de plaque destiné à un tube d'échangeur de chaleur, un tube d'échangeur de chaleur et un procédé de fabrication associé et, plus particulièrement, la présente invention concerne un matériau de plaque pour un tube d'échangeur de chaleur, un tube d'échangeur de chaleur et un procédé de fabrication associé comprenant la formation de différentes couches métalliques respectivement sur la surface externe et sur la surface interne d'un matériau de base, de sorte que l'écoulement résiduel soit réduit dans le tube et, également, que le fabricabilité et la productivité puissent être augmentées.
PCT/KR2021/007800 2020-06-22 2021-06-22 Matériau de plaque pour tube d'échangeur de chaleur, tube d'échangeur de chaleur comprenant ledit matériau, et procédé de fabrication associé WO2021261878A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20200075481 2020-06-22
KR10-2020-0075481 2020-06-22
KR1020210077975A KR20210157880A (ko) 2020-06-22 2021-06-16 열교환기 튜브용 판재, 이를 포함하는 열교환기 튜브, 및 그 제조 방법
KR10-2021-0077975 2021-06-16

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Publication Number Publication Date
WO2021261878A1 true WO2021261878A1 (fr) 2021-12-30

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PCT/KR2021/007800 WO2021261878A1 (fr) 2020-06-22 2021-06-22 Matériau de plaque pour tube d'échangeur de chaleur, tube d'échangeur de chaleur comprenant ledit matériau, et procédé de fabrication associé

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WO (1) WO2021261878A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004233011A (ja) * 2003-01-31 2004-08-19 Toyo Radiator Co Ltd 燃料電池用アルミニューム製熱交換器の製造方法
JP2012040603A (ja) * 2010-08-23 2012-03-01 T Rad Co Ltd アルミニウム製熱交換器の製造方法
KR20140015976A (ko) * 2012-07-27 2014-02-07 주식회사 두원공조 열교환기용 튜브 및 이의 제조방법
EP2699382B1 (fr) * 2011-04-21 2017-01-11 Aleris Rolled Products Germany GmbH Procédé de fabrication d'un produit de tube d'alliage en aluminium extrudé
JP2018158371A (ja) * 2017-03-23 2018-10-11 株式会社デンソー 熱交換器およびその製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005214511A (ja) 2004-01-29 2005-08-11 Calsonic Kansei Corp 熱交換器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004233011A (ja) * 2003-01-31 2004-08-19 Toyo Radiator Co Ltd 燃料電池用アルミニューム製熱交換器の製造方法
JP2012040603A (ja) * 2010-08-23 2012-03-01 T Rad Co Ltd アルミニウム製熱交換器の製造方法
EP2699382B1 (fr) * 2011-04-21 2017-01-11 Aleris Rolled Products Germany GmbH Procédé de fabrication d'un produit de tube d'alliage en aluminium extrudé
KR20140015976A (ko) * 2012-07-27 2014-02-07 주식회사 두원공조 열교환기용 튜브 및 이의 제조방법
JP2018158371A (ja) * 2017-03-23 2018-10-11 株式会社デンソー 熱交換器およびその製造方法

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