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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10307813 B1

PDFFull Text
Date of Patent:
Jun. 04, 2019

Filed:

Jul. 29, 2016

Aluminum alloy heat exchanger and method of producing refrigerant tube used for the heat exchanger

Applicant:

Sumitomo Light Metal Industries, Ltd., Minato-ku, Tokyo, JP;

Inventors:

Naoki Yamashita, Tokyo, JP;

Yasunaga Itoh, Tokyo, JP;

Yuji Hisatomi, Tokyo, JP;

Assignee:

SUMITOMO LIGHT METAL INDUSTRIES, LTD., Minato-ku, Tokyo, JP;

Attorney:

Flynn Thiel, P.C.

Primary Examiner:

John C Hong

Int. Cl.
CPC ...
B21D 53/06 (2006.01); B23K 35/28 (2006.01); B23K 35/36 (2006.01); B23K 35/362 (2006.01); C22C 21/00 (2006.01); C22C 21/02 (2006.01); C22C 21/10 (2006.01); C22C 21/14 (2006.01); F28F 19/02 (2006.01); F28F 21/08 (2006.01); F28F 1/00 (2006.01); F28F 19/06 (2006.01); B23K 101/14 (2006.01); F28D 21/00 (2006.01);
U.S. Cl.
CPC ...
B21D 53/06 (2013.01); B23K 35/282 (2013.01); B23K 35/362 (2013.01); B23K 35/3607 (2013.01); C22C 21/00 (2013.01); C22C 21/02 (2013.01); C22C 21/10 (2013.01); C22C 21/14 (2013.01); F28F 1/00 (2013.01); F28F 19/02 (2013.01); F28F 19/06 (2013.01); F28F 21/084 (2013.01); B23K 2101/14 (2018.08); F28D 2021/0084 (2013.01); F28D 2021/0085 (2013.01); F28F 2275/04 (2013.01);
Abstract

An aluminum alloy heat exchanger is produced by applying a coating material that is prepared by adding a binder to a mixture of an Si powder and a Zn-containing compound flux powder to a surface of an aluminum alloy refrigerant tube, assembling a bare fin that is formed of an Al—Mn—Zn alloy with the refrigerant tube, and brazing the refrigerant tube and the bare fin by heating in an atmosphere-controlled furnace, the refrigerant tube being an extruded product of an aluminum alloy that comprises 0.5 to 1.7% (mass %, hereinafter the same) of Mn, less than 0.10% of Cu, and less than 0.10% of Si, with the balance being Al and unavoidable impurities.

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