Title:
MANUFACTURE OF HEAT EXCHANGER MADE OF ALUMINUM
Document Type and Number:
Japanese Patent JPH05277723
Kind Code:
A
Abstract:
PURPOSE: To reduce the manufacturing cost of an aluminum heat exchanger forming black film on the surface.
CONSTITUTION: To the brazing part of the heat exchanger 1 assembling a heat exchanging tube 2 and fins 3, 3, fluoride base flux is applied by using polybutene as a dispersion medium. The heat exchanger 1 is laid on a conveyor 4 and sent into a heating furnace 5. Hydrocarbon gas generated by sublimating the polybutene, is blown to the heat exchanger 1 after brazing through a gas feeding pipe 7. As a result, to the surface of the heat exchanger 1, fine carbon particles separated from the hydrocarbon by action of fluorine are stuck and this surface changes to black.
Inventors:
Tatsuya Fujiyoshi
Application Number:
JP9729692A
Publication Date:
October 26, 1993
Filing Date:
March 25, 1992
Export Citation:
Assignee:
Calsonic Co., Ltd.
International Classes:
B23K1/00; B23K1/19; F28F21/00; B23K101/14; (IPC1-7): B23K1/19; B23K1/00; F28F21/00
Attorney, Agent or Firm:
Kinzo Oyama (1 person outside)
Previous Patent: JPS5277722
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