EP1645830A1 - Aluminum heat exchanger - Google Patents

Aluminum heat exchanger Download PDF

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Publication number
EP1645830A1
EP1645830A1 EP04747261A EP04747261A EP1645830A1 EP 1645830 A1 EP1645830 A1 EP 1645830A1 EP 04747261 A EP04747261 A EP 04747261A EP 04747261 A EP04747261 A EP 04747261A EP 1645830 A1 EP1645830 A1 EP 1645830A1
Authority
EP
European Patent Office
Prior art keywords
brazing
aluminum
heat exchanger
weight
metal
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.)
Withdrawn
Application number
EP04747261A
Other languages
German (de)
English (en)
French (fr)
Inventor
Takazi Igami
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.)
T Rad Co Ltd
Original Assignee
T Rad 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
Application filed by T Rad Co Ltd filed Critical T Rad Co Ltd
Publication of EP1645830A1 publication Critical patent/EP1645830A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/083—Supply, or operations combined with supply, of strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/09—Making tubes with welded or soldered seams of coated strip material ; Making multi-wall tubes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • 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
    • 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
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • 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
    • 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

Definitions

  • the present invention relates to an aluminum-made heat exchanger manufactured in such a manner that an aluminum strip-shaped material having a brazing metal and a sacrificial anode material on a core metal is bent in the width direction thereof to form a flat tube; many flat tubes are disposed parallel to each other to structure a core of the heat exchanger, and then subjected to a brazing in a furnace using a brazing flux to integrally fix the core of the heat exchanger.
  • a flat tube formed into a B-like shape in section.
  • the flat tubes which are coated with a brazing metal on the outer surface as described above, are disposed parallel to each other at same intervals; and corrugated fins are disposed between the flat tubes; and both ends of the flat tubes are inserted into tube insertion holes in the tube plates.
  • the surface and the like of the brazing metal is previously applied with flux and is subjected to a brazing in a furnace filled with atmosphere of inert gas; thus a heat exchanger is completed.
  • a sacrificial anode material is coated to prevent the inner surface side of the tube from corroding.
  • a sacrificial anode material which includes Mg of 1% or more, is used. After the brazing, the Mg combines with Si component included in the base material and an Mg 2 Si layer is formed on the base material; thereby the strength of the tube is increased.
  • an object of the present invention is to provide an aluminum-made heat exchanger, which is capable of being brazed satisfactorily on the joined portion thereof while maintaining the strength of the flat tube.
  • An aspect of the present invention, disclosed in claim 1, is an aluminum-made heat exchanger, having:
  • Another aspect of the present invention is the aluminum-made heat exchanger according to claim 1, wherein the brazing metal (2) of an aluminum alloy including Si of 7.5 to 12% by weight, the core metal (1) is equivalent to A3003 of A.
  • A. Standard (0.15% by weight of Cu, 1.2% by weight of Mn and balance of Al: the same is applied in the following) aluminum material added with Si of 0.4 to 1.2% by weight, the sacrificial anode material (3) is equivalent to A7072 of A.
  • the aluminum-made heat exchanger according to the present invention has a structure as described above, and provides the following effects.
  • the flat tube 5 is joined being interposed by the brazing metal 2 coated at the outer surface side thereof using a flux by means of brazing in a furnace.
  • the core metal 1 is of an Al-Si alloy; and the sacrificial anode material 3 coated on the inner surface of the tube is an Al-Mg-Zn alloy including Mg of 0.3 to 0.75% by weight.
  • the Mg and the Si of the core metal 1 combine with each other after the brazing to increase the strength of the base material. Moreover, since the Mg is controlled to be 0.75% or less by weight, the brazing performance with the brazing metal 2 is satisfactorily ensured; and accordingly, an aluminum-made heat exchanger with a high air and liquid tightness can be provided.
  • Fig. 1 shows an enlarged view of a flat tube for an heat exchanger according to the present invention, illustrating a relevant portion before brazing
  • Fig. 2 shows a plane view of the heat exchanger, illustrating the assembly state thereof
  • Fig. 3 shows a schematic sectional view taken along a line III-III in Fig. 2
  • Fig. 4 shows a front view illustrating a relevant portion of the heat exchanger.
  • the heat exchanger has many flat tubes 5 disposed parallel to each other at certain intervals and corrugated fins 10 disposed between the flat tubes 5, and both ends of the respective flat tubes 5 are inserted into tube insertion holes in tube plates 6; thus a core is assembled.
  • the flat tube 5 is formed, for example, by bending a strip-shaped material into a B-like shape in section as shown in Fig. 1 and Fig. 2.
  • the flat tube according to the present invention includes such a tube that has no partition part at the center thereof.
  • the strip-shaped material is coated with a brazing metal 2 at the outer surface side of the core metal 1, and the inner surface side thereof is coated with a sacrificial anode material 3.
  • the core metal 1 is formed of, for example, a plate material in which aluminum material of A3003 (A. A. Standard of US Aluminum Association: the same is applied in the following) added with Si of 0.4 to 1.2% by weight; and the brazing metal 2 is an aluminum alloy including Si of 7.5 to 12% by weight.
  • the sacrificial anode material 3 is an aluminum alloy equivalent to A7072 (A. A. Standard) added with Mg of 0.3 to 0.75% by weight. These plate materials are joined with pressure to form a 3-layered brazing sheet.
  • the strip-shaped material as described above is bent continuously in a manner of, for example, roll forming; a partition part 4 is formed by turning up at the central portion thereof in the width direction; both edges of the strip-shaped material are folded back toward the inner surface side to form turned-back ends 7; and the entire thereof is bent into a flat tube shape so that the brazing metal 2 of the turned-back ends 7 abut on the top portion of the partition part 4.
  • a flux 8 is applied beforehand.
  • the applying method of the flux for example, as shown in Fig. 5, in a state that the strip-shaped material has a gate-like shape in section in the process of forming the tube, the top portion of the partition part 4 at the central portion of the inner surface is applied with the flux 8 from a container 12 via a flux applying wheel 13.
  • the flux-applying wheel 13 is driven to rotate, and in a state that the flux 8 is applied in a ring-like groove 14 thereof, and the flux 8 is transferred to the central portion of the partition part 4.
  • the flux 8 is supplied afterward to the butting surface of both turned-back ends 7 of the strip-shaped material and is applied to the outer surface side also of the flat tube 5.
  • any known flux from chlorides or fluorides may be used.
  • KF-AlF 3 and Nocolok (product name) is available.
  • the adhesive an acrylic resin binder is used.
  • the thinner machine oil, oil or the like may be used.
  • the amount of the Mg included therein were different from each other as 0.2%, 0.3%, 0.6%, 0.75%, 0.8%, 1.0% as shown in table 1, the other components included in the sacrificial anode material is the identical to those of the A7072; i.e., Zn is 1.0%, and the balance is Al.
  • the core metal is of the materials equivalent to those of A3003 added with Si of 1.0%; i.e., Cu is 0.15% ; Si is 1%, Mn is 1.2% and the balance is Al.
  • the brazing metal includes Si of 10%, and the balance is Al.
  • the strength was 140 kg/mm 2 or more.
  • the amount of Mg was 0.2%, the strength was 125 kg/mm 2 ; it was smaller than a desired strength of 140 kg/mm 2 .
  • the amount of Mg was 0.8% and 1 . 0%, although a satisfactory strength was ensured, a problem resided in brazing performance. That is, the flux and Mg reacted with each other reducing the brazing performance. Therefore, the amount of Mg included in the sacrificial anode material that satisfies both of the strength and the brazing performance is 0.3 to 0.75% by weight; an Al-Mg-Zn alloy.
  • the core metal may include Si of approximately 0.4 to 1.2% by weight. In this case also, the same results as the above were obtained.

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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)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geometry (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
EP04747261A 2003-07-15 2004-07-02 Aluminum heat exchanger Withdrawn EP1645830A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003274973A JP2005037062A (ja) 2003-07-15 2003-07-15 アルミニューム製熱交換器
PCT/JP2004/009793 WO2005005907A1 (ja) 2003-07-15 2004-07-02 アルミニューム製熱交換器

Publications (1)

Publication Number Publication Date
EP1645830A1 true EP1645830A1 (en) 2006-04-12

Family

ID=34056103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04747261A Withdrawn EP1645830A1 (en) 2003-07-15 2004-07-02 Aluminum heat exchanger

Country Status (5)

Country Link
US (1) US20060219393A1 (ja)
EP (1) EP1645830A1 (ja)
JP (1) JP2005037062A (ja)
CN (1) CN1823253A (ja)
WO (1) WO2005005907A1 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2923002A1 (fr) * 2007-10-31 2009-05-01 Valeo Systemes Thermiques Tube pour echangeur thermique
FR2931713A1 (fr) * 2008-06-02 2009-12-04 Alcan Int Ltd Bandes en alliage d'aluminium pour tubes d'echangeurs thermiques brases
WO2010003623A1 (de) * 2008-07-07 2010-01-14 Behr Gmbh & Co. Kg Wärmeübertrager, insbesondere wärmeübertager eines kraftfahrzeuges, und verfahren zum herstellen eines kühlrohres eines wärmeübertragers
FR2936597A1 (fr) * 2008-10-01 2010-04-02 Valeo Systemes Thermiques Echangeur de chaleur a epaisseur de composant reduit et son procede de fabrication

Families Citing this family (15)

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Publication number Priority date Publication date Assignee Title
JP2004333023A (ja) * 2003-05-08 2004-11-25 Toyo Radiator Co Ltd アルミニューム製熱交換器用偏平チューブ
JP2005043026A (ja) * 2003-07-25 2005-02-17 Toyo Radiator Co Ltd 熱交換器用偏平チューブ
KR100624372B1 (ko) * 2004-07-27 2006-09-20 엘지전자 주식회사 열교환기용 냉각핀의 부식 방지방법
JP2006226613A (ja) * 2005-02-17 2006-08-31 Shinko Alcoa Yuso Kizai Kk 熱交換器用偏平チューブ
JP5033366B2 (ja) * 2006-07-03 2012-09-26 株式会社ケーヒン・サーマル・テクノロジー 扁平管の製造方法および扁平管半製品の製造装置
US20090288811A1 (en) * 2008-05-20 2009-11-26 Bolla James D Aluminum plate-fin heat exchanger utilizing titanium separator plates
JP5577616B2 (ja) * 2009-04-06 2014-08-27 株式会社デンソー 熱交換器用チューブ及び熱交換器
DE102009055608A1 (de) * 2009-11-25 2011-05-26 Behr Gmbh & Co. Kg Gelöteter Aluminium-Wärmeübertrager
DE102010031468A1 (de) * 2010-07-16 2012-01-19 Behr Gmbh & Co. Kg Fluidkanal für einen Wärmetauscher
CN102536426A (zh) * 2012-03-06 2012-07-04 韦瑛 铝镁合金中冷器管
GB2509762B (en) * 2013-01-14 2015-02-04 Halla Visteon Climate Control Tube for Heat Exchanger
HUE042051T2 (hu) * 2013-07-05 2019-06-28 Hydro Aluminium Rolled Prod Alumínium összetett anyag, mely belefektetett szilárd réteget tartalmaz
CN106767091A (zh) * 2016-12-27 2017-05-31 无锡逸龙铝热科技有限公司 一种多通道异形扁管及其生产方法
CN109855166B (zh) * 2018-12-12 2022-02-22 北京金旗舰暖通科技有限公司 一种防腐散热器
JPWO2021261574A1 (ja) * 2020-06-26 2021-12-30

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2923002A1 (fr) * 2007-10-31 2009-05-01 Valeo Systemes Thermiques Tube pour echangeur thermique
EP2056054A1 (fr) * 2007-10-31 2009-05-06 Valeo Systemes Thermiques Tube pour échangeur thermique
CN101487673B (zh) * 2007-10-31 2012-06-27 法雷奥热系统公司 用于热交换器的管道
FR2931713A1 (fr) * 2008-06-02 2009-12-04 Alcan Int Ltd Bandes en alliage d'aluminium pour tubes d'echangeurs thermiques brases
WO2009156607A1 (fr) * 2008-06-02 2009-12-30 Alcan International Limited Bandes en alliage d'aluminium pour tubes d'échangeurs thermiques brasés
WO2010003623A1 (de) * 2008-07-07 2010-01-14 Behr Gmbh & Co. Kg Wärmeübertrager, insbesondere wärmeübertager eines kraftfahrzeuges, und verfahren zum herstellen eines kühlrohres eines wärmeübertragers
US8991481B2 (en) 2008-07-07 2015-03-31 Behr Gmbh & Co. Kg Heat exchanger for a motor vehicle, and method for manufacturing a cooling tube of a heat exchanger
FR2936597A1 (fr) * 2008-10-01 2010-04-02 Valeo Systemes Thermiques Echangeur de chaleur a epaisseur de composant reduit et son procede de fabrication
WO2010037803A1 (fr) * 2008-10-01 2010-04-08 Valeo Systemes Thermiques Echangeur de chaleur a epaisseur de composant reduit et son procede de fabrication

Also Published As

Publication number Publication date
WO2005005907A1 (ja) 2005-01-20
JP2005037062A (ja) 2005-02-10
US20060219393A1 (en) 2006-10-05
CN1823253A (zh) 2006-08-23

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