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Title:
FLAT TUBE FOR HEAT EXCHANGERS
Document Type and Number:
WIPO Patent Application WO/2021/261574
Kind Code:
A1
Abstract:
This flat tube is composed of a pair of aluminum plates 1, 2 and has at least one turn-back part 3 in the inner surface; and a top part 3a of the turn-back part 3 and the aluminum plates 1, 2 facing the top part are reliably brazed to each other without applying a flux to the inner surface. The outer surfaces of core materials 4, 5 of the aluminum plates 1, 2 are covered with conventional brazing materials 6, 7 that do not contain Mg; and the inner surface of the core material 4 of at least one of the aluminum plates, namely the aluminum plate 1, is covered with a brazing material 8 that contains Mg, with the Mg content thereof being from 0.1 wt% to 1.0 wt%.

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Inventors:
KUMA SHUN-ICHIRO (JP)
NAKAJIMA MASAAKI (JP)
Application Number:
PCT/JP2021/024050
Publication Date:
December 30, 2021
Filing Date:
June 17, 2021
Export Citation:
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Assignee:
T RAD CO LTD (JP)
International Classes:
C22C21/00; B23K35/28; F28F1/02; F28F9/18; F28F21/08
Foreign References:
JP2018196896A2018-12-13
JP2015078821A2015-04-23
JP2017058065A2017-03-23
JP2018103260A2018-07-05
JP2019155453A2019-09-19
JP2005037062A2005-02-10
JP2013132689A2013-07-08
US20110204124A12011-08-25
Attorney, Agent or Firm:
KUBOTA, Takubi (JP)
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