BRAZING METHOD FOR HEAT EXCHANGER

WIPO Patent Application WO/2010/147170

A1

In brazing of a semi-sealed heat exchanger, while performing preferable brazing by applying a flux into a refrigerant chamber, brazing environment contamination due to dropping of the flux is minimized. In a brazing method for a heat exchanger, one member (20) having a swelling portion (23) is disposed facing the other member (10) while a fin (31) is disposed inside the swelling portion (23), and the surrounding area (25) of the swelling portion (23) is brazed to the other member (10), thereby forming a semi-sealed refrigerant chamber (2) having openings (26, 27) and also brazing the fin (31). Fluoride-based flux particles are sprayed on, made collide at a high speed against, and mechanically attached to at least a part of area where the refrigerant chamber (2) is formed and at least a part of brazing area around the refrigerant chamber (2) in both surfaces or one surface of the opposing surfaces of the two members (10, 20). The two members (10, 20) and the fin (31) are then assembled as a temporary assembly body having the fin (31) disposed inside the refrigerant chamber (2), and the temporary assembly body is heated and brazed in an inactive gas atmosphere.

JPH0756122

[Name of device] Heat exchanger brazing jig

IWAI ICHIRO (JP)
MATSUSHIMA SEIJI (JP)

PCT/JP2010/060264

December 23, 2010

June 17, 2010

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SHOWA DENKO KK (JP)
IWAI ICHIRO (JP)
MATSUSHIMA SEIJI (JP)

B23K3/00; B23K1/00; B23K31/02; B23K101/14; B23K103/10

JP2001255090A	2001-09-21
JP2002538006A	2002-11-12
JPH11291028A	1999-10-26
JP2008231486A	2008-10-02
JP2008039255A	2008-02-21
JPS63132767A	1988-06-04

SHIMIZU Yoshihito et al. (JP)
Yoshihito Shimizu (JP)

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