| 摘要 |
PURPOSE:To prevent the defect generation of a product and to reduce the cost by adhering the minimum necessary brazing filler metals to the apex part on the outer face of a corrugated fin, then by heating and brazing by combining with a separate plate. CONSTITUTION:A brazing filler metal 4 is adhered with controlling the adhesion quantity by spraying or brushing, etc. on the outer face apex part 1a of a corrugated fin 1, and the minimum necessary brazing filler metal 4 is adhered on the abutting plate to the corrugated fin 1, spacer bar, side bar 3, etc. as well. Brazing with heating is then performed in a vacuum furnace, etc. by forming a heat exchanger by combining with the separate plate 2. Owing to the brazing being performed with the brazing filler metal 4 in least quantity the product cost is reduced. The generation of the product defect due to the pitting corrosion can be prevented because there is no diffusion of excess brazing filler metals.
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