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Patent Searching and Data


Title:
METHOD FOR JOINING DOUBLE PIPE IN HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2019/240204
Kind Code:
A1
Abstract:
This method for joining a double pipe is applied to a heat exchanger provided with a double pipe comprising an outer pipe (1) and an inner pipe (2) that are made of an aluminum alloy. The heat exchanger performs heat exchange between a refrigerant flowing between the inner pipe (2) and the outer pipe (1) and a refrigerant flowing inside the inner pipe (2). In the joining method, the outer pipe (1) and the inner pipe (2) in the heat exchanger configured in this manner are joined by brazing. More specifically, protrusions (3) that project radially from the outer periphery of the inner pipe (2) toward the outer pipe (1) are formed on the inner pipe (2), and the outer pipe (1) and the inner pipe (2) are brazed at the protrusions (3).

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Inventors:
SUZUKI TAICHI (JP)
DOKO TAKEYOSHI (JP)
YAMASHITA NAOKI (JP)
YOSHINO MAKOTO (JP)
ONO JUNICHI (JP)
YAMAMOTO KEN (JP)
NAKAJIMA RYOTA (JP)
Application Number:
PCT/JP2019/023379
Publication Date:
December 19, 2019
Filing Date:
June 12, 2019
Export Citation:
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Assignee:
DENSO AIR SYSTEMS CORP (JP)
UACJ CORP (JP)
UACJ EXTRUSION CORP (JP)
International Classes:
F28D7/10; B23K1/00; B23K1/19; B23K31/02; B23K33/00; F28F21/08; B23K101/06; B23K101/14
Foreign References:
DE102011008119A12012-07-12
US20120279691A12012-11-08
JPH1038491A1998-02-13
JP2009162395A2009-07-23
Attorney, Agent or Firm:
ONDA Makoto et al. (JP)
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