Title:
ALUMINUM-MADE HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2016/175066
Kind Code:
A1
Abstract:
An aluminum-made heat exchanger in which joint parts 1 each formed by polymerizing edge parts of tube plates and joint parts 2 each formed by abutting an inner fin to each of the tube plates are brazed without using a flux, wherein the inner fin comprises a brazing sheet that is composed of a core material made from an aluminum alloy and an Al-Si-based brazing material. In the inner fin, both surfaces of the core material are cladded with the Al-Si-based brazing material. The Al-Si-based brazing material contains Si in an amount of 9 to 13%, also contains at least one of Mg in an amount of 0.2 to 1.2%, Li in an amount of 0.004 to 0.1% and Ca in an amount of 0.005 to 0.03%, and also contains one or both of Cu and Zn, with the remainder made up by Al and unavoidable impurities. The Al-Si-based brazing material has a solidus temperature of 570ºC or lower, wherein the solidus temperature is lower than the solidus temperature of an intervening Al-Si-based brazing material between the joints 1.
According to the present invention, it becomes possible to reduce the formation of defective fillets in external-side joints positioned outside the heat exchanger, which may be caused when a brazing material is sucked from the external-side joints toward inside joints positioned inside the heat exchanger, to thereby improve part-part bondability in the heat exchanger.
Inventors:
SATO HIDEAKI (JP)
TAKAHASHI EIZO (JP)
ITOH YASUNAGA (JP)
YANAGAWA YUTAKA (JP)
YAMAYOSHI TOMOKI (JP)
TAKAHASHI EIZO (JP)
ITOH YASUNAGA (JP)
YANAGAWA YUTAKA (JP)
YAMAYOSHI TOMOKI (JP)
Application Number:
PCT/JP2016/062207
Publication Date:
November 03, 2016
Filing Date:
April 18, 2016
Export Citation:
Assignee:
DENSO CORP (JP)
UACJ CORP (JP)
UACJ CORP (JP)
International Classes:
B23K35/28; B23K35/22; C22C21/00; F28F3/08; F28F21/08
Foreign References:
| JP2003112286A | 2003-04-15 | |||
| JP2015058466A | 2015-03-30 | |||
| JP2014519413A | 2014-08-14 | |||
| JP2013123720A | 2013-06-24 | |||
| JP2015033716A | 2015-02-19 |
Attorney, Agent or Firm:
AKATSUKA Kenji et al. (JP)
Kenji Akatsuka (JP)
Kenji Akatsuka (JP)
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