US20050006065A1 - Heat exchanger tube - Google Patents

Heat exchanger tube Download PDF

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Publication number
US20050006065A1
US20050006065A1 US10/823,563 US82356304A US2005006065A1 US 20050006065 A1 US20050006065 A1 US 20050006065A1 US 82356304 A US82356304 A US 82356304A US 2005006065 A1 US2005006065 A1 US 2005006065A1
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US
United States
Prior art keywords
heat exchanger
tube
flux
alloy extruded
powder
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
US10/823,563
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English (en)
Inventor
Masaya Katsumata
Yasunori Hyogo
Akira Watanabe
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.)
MA Aluminum Corp
Original Assignee
Mitsubishi Aluminum Co Ltd
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32985625&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20050006065(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mitsubishi Aluminum Co Ltd filed Critical Mitsubishi Aluminum Co Ltd
Assigned to MITSUBISHI ALUMINUM CO., LTD. reassignment MITSUBISHI ALUMINUM CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HYOGO, YASUNORI, KATSUMATA, MASAYA, WATANABE, AKIRA
Publication of US20050006065A1 publication Critical patent/US20050006065A1/en
Priority to US11/218,595 priority Critical patent/US20060000586A1/en
Priority to US12/690,685 priority patent/US8640766B2/en
Priority to US14/142,371 priority patent/US9283633B2/en
Priority to US14/967,470 priority patent/US20160097607A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
    • B23K1/203—Fluxing, i.e. applying flux onto surfaces
    • 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
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B23K35/3603—Halide salts
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings 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
    • B23K2101/06—Tubes
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
    • 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
    • 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
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • 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
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B23K35/3603—Halide salts
    • B23K35/3605—Fluorides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/16—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes extruded

Definitions

  • the present invention relates to a heat exchanger tube and, more particularly, relates to a heat exchanger tube having high corrosion resistance.
  • a heat exchanger generally comprises a pair of right and left pipe bodies called header pipes 5 , a multitude of tubes 1 made of an aluminum alloy installed in parallel at intervals from each other between the header pipes 5 , and fins 6 installed between the tubes 1 , 1 .
  • the inner space of each of the tubes 1 and the inner space of the header pipes 5 communicate with each other, so as to circulate a medium through the inner space of the header pipes 5 and the inner space of each of the tubes 1 , thereby achieving efficient heat exchange via the fins 6 .
  • the tubes 1 of the heat exchanger from heat exchanger tubes 11 made by coating the surface of an Al alloy extruded tube 3 , that has flattened cross section and a plurality of holes 4 for passing the medium as shown in perspective view of FIG. 1 , with a flux containing a brazing material powder so as to form a flux layer 2 .
  • a flux containing a brazing material powder so as to form a flux layer 2 .
  • the Al alloy extruded tube 3 from material (JIS1050) that has high workability for extrusion forming process, and to use a Si powder, an Al—Si alloy powder or an Al—Si—Zn alloy powder as the brazing material contained in the flux layer 2 .
  • a heat exchanger is manufactured using the conventional heat exchanger tube 11 described above in a process such as: the heat exchanger tubes 11 are installed at right angles to the header pipes 5 that are disposed in parallel at a distance from each other, ends of the heat exchanger tubes 11 are inserted into openings (not shown) that are provided in the side face of the header pipe 5 , the fins 6 having corrugated shape are assembled between the heat exchanger tubes 11 , and the assembly is heated in a heating furnace so that the header pipes 5 and the tubes 1 are fastened to each other by brazing with the brazing material provided on the heat exchanger tube 11 while the fins 6 of corrugated shape are fastened between the tubes 1 , 1 by brazing.
  • Wall thickness of the tube 1 that constitutes the heat exchanger is made smaller than that of the header pipe 5 in order to achieve high efficiency of heat exchange.
  • a sacrificial anode layer containing Zn as a major component is formed on the surface of the tubes in the conventional heat exchangers.
  • processes are known as thermal spraying of Zn and coating with a Zn-containing flux.
  • Japanese Patent Application Unexamined Publication No. 7-227695 discloses an example that employs Zn-containing flux.
  • the present invention which has been completed in view of the background described above, has an object of providing a heat exchanger tube that has higher corrosion resistance.
  • the present invention employs the following constitution.
  • the heat exchanger tube of the present invention comprises an Al alloy extruded tube, and a flux layer containing a Si powder and a Zn-containing flux formed on the external surface of the Al alloy extruded tube, wherein an amount of the Si powder applied to the Al alloy extruded tube is not less than 1 g/m 2 and not more than 5 g/m 2 , and an amount of the Zn-containing flux applied to the Al alloy extruded tube is not less than 5 g/m 2 and not more than 20 g/m 2 .
  • the Zn-containing flux preferably contains at least one Zn compound selected from ZnF 2 , ZnCl 2 and KZnF 3 .
  • maximum particle size of the Si powder it is preferable for maximum particle size of the Si powder to be 30 ⁇ m or less. Maximum particle size larger than 30 ⁇ m results in an increase in the erosion depth of the tube and is therefore not desirable. When maximum particle size of the Si powder is less than 0.1 ⁇ m, Si particles clump, and the erosion depth of the tube increases also in this case. Therefore, the maximum particle size is preferably not less than 0.1 ⁇ m.
  • the Al alloy extruded tube is preferably made of an Al alloy containing Si and Mn, with the balance being Al and inevitable impurities, while a Si content is 0.5% by weight or more and 1.0% by weight or less, and a Mn content is 0.05% by weight or more and 1.2% by weight or less.
  • FIG. 1 is a perspective view of a heat exchanger tube of the prior art.
  • FIG. 2 is a perspective view of a heat exchanger of the prior art.
  • the heat exchanger tube of the present invention is made by forming the external surface of an Al alloy extruded tube with a flux layer containing a Si powder and a Zn-containing flux.
  • the Al alloy extruded tube which constitutes the heat exchanger tube is made of an Al alloy containing Si and Mn, with the balance being Al and inevitable impurities, where a Si content is 0.5% by weight or more and 1.0% by weight or less, and a Mn content is 0.05% by weight or more and 1.2% by weight or less.
  • Si has an effect in that a large amount of Si forms a solid solution in the Al alloy extruded tube, thus resulting in noble potential of the Al alloy extruded tube, and causes preferential corrosion to occur in the header pipes and the fins that are brazed with the tubes when assembling the heat exchanger, thereby suppressing deep pitting corrosion from occurring in the Al alloy extruded tube, while improving the brazing characteristic and forming good joint thereby to improve the strength after brazing.
  • Si content of less than 0.5% cannot achieve the desired effect, and is therefore not desirable.
  • Si content higher than 1.0% on the other hand, lowers the melting point of the alloy resulting in excessive melting during brazing and poor extrusion forming characteristic, and is not desirable. Therefore, Si concentration in the Al alloy extruded tube is set in a range from 0.5 to 1.0%. More preferable range of Si concentration is from 0.6% to 0.8%.
  • Mn has the effect of turning the Al alloy extruded tube to noble potential and, because of less likelihood of diffusing in the brazing material, allows higher potential difference with the fin or the header pipe so as to make the corrosion preventing effect of the fin or the header pipe more effective, thereby improving the external corrosion resistance and the strength after brazing.
  • Mn content of less than 0.05% cannot achieve sufficient effect of turning the Al alloy extruded tube to noble potential, and is therefore not desirable.
  • Mn content higher than 1.2% results in poor extrusion forming characteristic, and is not desirable.
  • the flux layer formed on the tube surface contains the Zn-containing flux and the Si powder, so that a molten brazing material layer is formed over the entire surface of the tube after brazing. Since the brazing material layer contains Zn uniformly distributed therein, the brazing material layer has similar effect as that of the sacrificial anode layer so that the brazing material layer is subject to preferential planar corrosion. Therefore deep pitting corrosion can be suppressed and corrosion resistance can be improved.
  • the amount of a Si powder applied to the heat exchanger tube is preferably not less than 1 g/m 2 and not more than 5 g/m 2 .
  • the amount is less than 1 g/m 2 , sufficient brazing strength cannot be achieved because of insufficient amount of the brazing material, and sufficient diffusion of Zn cannot be achieved.
  • the amount is more than 5 g/m 2 , Si concentration in the tube surface increases and the rate of corrosion increases, and is therefore not desirable.
  • the flux layer contains at least the Zn-containing flux.
  • a flux which does not contain Zn may also be contained.
  • the Zn-containing flux preferably contains at least one Zn compound selected from ZnF 2 , ZnCl 2 and KZnF 3 .
  • the flux which does not contain Zn preferably contains at least one fluoride such as LiF, KF, CaF 2 , AlF 3 or SiF 4 or a complex compound of the fluoride such as KAlF 4 or KAlF 3 .
  • a Zn-diffused layer (brazing material layer) is formed on the tube surface after brazing, so that the Zn-diffused layer functions as a sacrificial anode layer, thereby improving the anti-corrosion effect of the tube.
  • the Si powder melts and turns into a brazing liquid during a brazing process, Zn contained in the flux is diffused uniformly in the brazing liquid and is distributed uniformly over the tube surface. Since diffusion velocity of Zn in a liquid phase such as the brazing liquid is significantly faster than the diffusion velocity in a solid phase, Zn concentration in the tube surface becomes substantially uniform, thus making it possible to form a uniform Zn-diffused layer and improve the corrosion resistance of the heat exchanger tube.
  • the amount of the Zn-containing flux applied to the heat exchanger tube is not less than 5 g/m 2 and not more than 20 g/m 2 .
  • An amount of less than 5 g/m 2 results in insufficient formation of a Zn-diffused layer that does not have sufficient anti-corrosion effect, and is therefore not desirable.
  • An amount of more than 20 g/m causes excessive Zn to be concentrated in a fillet that is the joint of the fin with other components which results in higher rate of corrosion in the joint, and is therefore not desirable.
  • the heat exchanger can be constituted by brazing the heat exchanger header pipes and the fins to the heat exchanger tube described above.
  • Al alloy extruded tubes having 10 cooling medium passing holes and cross section measuring 20 mm in width, 2 mm in height and wall thickness of 0.20 mm were produced, by extrusion forming of billets made of an Al alloy containing 0.7% by weight of Si and 0.5% by weight of Mn.
  • a flux mixture was prepared by mixing the Zn-containing flux to Si powder.
  • the flux mixture was applied by spraying onto the outer surface of the Al alloy extruded tube that was produced in advance, thereby forming a flux layer.
  • the amounts of the Si powder and the flux mixture applied to the Al alloy extruded tube are shown in Table 1.
  • fins made of cladding material JIS3003 or JIS3003/JIS4045
  • the assemblies were kept at 600° C. in a nitrogen atmosphere for three minutes so as to carry out brazing.
  • the tubes with the fins brazed thereon were subjected to corrosion tests (SWAAT, 20 days) to measure the maximum corrosion depth of the tubes. The test results are shown in Table 1.
  • Example 6 showed a little deeper erosion because of larger maximum particle size of the Si powder.
  • the Si powder melts and turns into a brazing liquid during a brazing process, while Zn contained in the flux is diffused uniformly in the brazing liquid and is distributed uniformly over the tube surface. Since diffusion velocity of Zn in a liquid phase such as the brazing liquid is significantly higher than diffusion velocity in a solid phase, Zn concentration in the tube surface becomes substantially uniform, thus making it possible to form a uniform sacrificial anode layer and improve the corrosion resistance of the heat exchanger tube.
  • the amount of the Zn-containing flux is in a range not less than 5 g/m 2 and not more than 20 g/m 2 , Zn can be distributed uniformly over the tube surface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Geometry (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
US10/823,563 2003-05-06 2004-04-14 Heat exchanger tube Abandoned US20050006065A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US11/218,595 US20060000586A1 (en) 2003-05-06 2005-09-06 Method of coating a device, particularly a heat exchanger tube
US12/690,685 US8640766B2 (en) 2003-05-06 2010-01-20 Heat exchanger tube
US14/142,371 US9283633B2 (en) 2003-05-06 2013-12-27 Heat exchanger tube precursor and method of producing the same
US14/967,470 US20160097607A1 (en) 2003-05-06 2015-12-14 Heat exchanger tube precursor and method of producing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-128170 2003-05-06
JP2003128170A JP4413526B2 (ja) 2003-05-06 2003-05-06 熱交換器用チューブ

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/218,595 Continuation US20060000586A1 (en) 2003-05-06 2005-09-06 Method of coating a device, particularly a heat exchanger tube

Publications (1)

Publication Number Publication Date
US20050006065A1 true US20050006065A1 (en) 2005-01-13

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ID=32985625

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/823,563 Abandoned US20050006065A1 (en) 2003-05-06 2004-04-14 Heat exchanger tube
US11/218,595 Abandoned US20060000586A1 (en) 2003-05-06 2005-09-06 Method of coating a device, particularly a heat exchanger tube

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11/218,595 Abandoned US20060000586A1 (en) 2003-05-06 2005-09-06 Method of coating a device, particularly a heat exchanger tube

Country Status (8)

Country Link
US (2) US20050006065A1 (de)
EP (1) EP1475598B1 (de)
JP (1) JP4413526B2 (de)
CN (1) CN1305637C (de)
AT (1) ATE412157T1 (de)
DE (1) DE602004017246D1 (de)
ES (1) ES2314310T3 (de)
PL (1) PL1475598T3 (de)

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US20070230184A1 (en) * 2006-03-31 2007-10-04 Shuy Geoffrey W Heat exchange enhancement
US20070230185A1 (en) * 2006-03-31 2007-10-04 Shuy Geoffrey W Heat exchange enhancement
US20080180969A1 (en) * 2006-03-31 2008-07-31 Geoffrey Wen-Tai Shuy Heat Exchange Enhancement
US20100051247A1 (en) * 2008-09-02 2010-03-04 Calsonic Kansei Corporation Heat exchanger made of aluminum alloy and method of producing same
US20100116472A1 (en) * 2003-05-06 2010-05-13 Mitsubishi Aluminum Co., Ltd. Heat exchanger tube
EP2226150A1 (de) * 2007-12-18 2010-09-08 Showa Denko K.K. Verfahren zur herstellung eines elements für einen wärmetauscher und element für wärmetauscher
US20120318488A1 (en) * 2010-03-02 2012-12-20 Mitsubishi Aluminum Co., Ltd Aluminum alloy heat exchanger
US20140237360A1 (en) * 2007-09-04 2014-08-21 Apple Inc. Editing interface
US9283633B2 (en) 2003-05-06 2016-03-15 Mitsubishi Aluminum Co. Ltd. Heat exchanger tube precursor and method of producing the same
US10150186B2 (en) 2014-12-11 2018-12-11 Uacj Corporation Brazing method
US10640852B2 (en) 2017-03-30 2020-05-05 Uacj Corporation Aluminum-alloy clad material and method of manufacturing the same
US10661395B2 (en) 2014-07-30 2020-05-26 Uacj Corporation Aluminum-alloy brazing sheet
US11007609B2 (en) 2016-11-29 2021-05-18 Uacj Corporation Brazing sheet and manufacturing method thereof
US11298779B2 (en) 2017-11-08 2022-04-12 Uacj Corporation Brazing sheet and manufacturing method thereof
US11320217B2 (en) 2016-01-14 2022-05-03 Uacj Corporation Heat exchanger and method of manufacturing the same

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US8516989B2 (en) * 2003-09-02 2013-08-27 Andreas Stihl Ag & Co. Kg Internal combustion engine having an elastic connecting duct
JP4611797B2 (ja) * 2005-04-28 2011-01-12 三菱アルミニウム株式会社 ろう付性に優れたラジエータチューブ用アルミニウム合金板材、及びそれを備えたラジエータチューブと熱交換器
JP4541252B2 (ja) * 2005-08-18 2010-09-08 三菱アルミニウム株式会社 ラジエータチューブ用アルミニウム合金板材
WO2007087822A1 (en) * 2006-01-31 2007-08-09 Norsk Hydro Asa A process for making a heat exchanger
DE102008009695B4 (de) 2007-03-02 2023-10-12 Mahle International Gmbh Halbzeug
JP2008275183A (ja) * 2007-04-25 2008-11-13 Ihi Corp 熱交換器、熱交換器の製造方法及びｅｇｒシステム
JP2009106947A (ja) * 2007-10-26 2009-05-21 Mitsubishi Alum Co Ltd アルミニウム合金チューブ
JP2010085065A (ja) * 2008-10-02 2010-04-15 Mitsubishi Alum Co Ltd フィンチューブ型エアコン熱交換器用アルミニウム合金押出チューブ
US8196909B2 (en) * 2009-04-30 2012-06-12 Uop Llc Tubular condensers having tubes with external enhancements
US8910702B2 (en) 2009-04-30 2014-12-16 Uop Llc Re-direction of vapor flow across tubular condensers
JP5610714B2 (ja) 2009-06-24 2014-10-22 株式会社Uacj アルミニウム合金製熱交換器
US9059402B2 (en) 2009-06-25 2015-06-16 Nec Corporation Resistance-variable element and method for manufacturing the same
JP5675092B2 (ja) * 2009-12-28 2015-02-25 三菱アルミニウム株式会社 耐食性に優れた熱交換器用アルミニウム合金チューブ及びそれを用いた熱交換器
JP5750237B2 (ja) 2010-05-25 2015-07-15 株式会社Uacj アルミニウム合金製熱交換器の製造方法
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