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Title:
BRAZING SHEET FOR HEAT EXCHANGER, JOINT STRUCTURE OF BRAZING SHEET FOR HEAT EXCHANGER, METHOD FOR JOINING BRAZING SHEET FOR HEAT EXCHANGER, AND HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2021/070793
Kind Code:
A1
Abstract:
A brazing sheet (10) used in a heat exchanger according to the present invention is provided with a core material (11) composed of an aluminum alloy, a brazing material layer (12), and a sacrificial positive electrode material layer (13) containing zinc, and has a joint surface (10a) constituting a joint portion (21) and a non-joint adjacent surface (10b) adjacent to the joint surface (10a). The joint surface (10a) is defined by joining the sacrificial positive electrode material layers (13). A fillet (22) is formed at a portion between the non-joint adjacent surfaces (10b) and adjacent to the joint surface (10a). This sacrificial positive electrode material contains zinc in the range of 0.5-6.0 mass% and silicon in the range of 3.0-11 mass%, both this brazing material and this sacrificial positive electrode material contain no copper, and the core material contains copper in the range of 0.3-1.2 mass%.

Inventors:
NAKAJIMA TAKAHITO
HIROTA MASANOBU
YAMAMOTO NORIAKI
Application Number:
PCT/JP2020/037794
Publication Date:
April 15, 2021
Filing Date:
October 06, 2020
Export Citation:
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Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
B23K35/22; C22C21/00; B23K35/28; F28D9/02; F28F19/02; F28F19/06; F28F21/08
Foreign References:
JPH08303988A1996-11-22
JP2009155679A2009-07-16
JP2017145463A2017-08-24
JP2014054656A2014-03-27
JP2000084662A2000-03-28
JP2000190089A2000-07-11
JPH11199957A1999-07-27
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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