| 摘要 |
<p>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.</p> |
