| 摘要 |
PURPOSE:To eliminate the need for jigs and to reduce the cost of production by inserting plural into a body part, joining the body part and the fins by welding, and brazing and joining the joined body part and the fins by brazing materials. CONSTITUTION:The plural fins 3 are inserted into the body part 2 by a 1st stage and thereafter, the body part 2 and the fins 3 are directly welded from the circumference of the body part 2 by a 2nd stage. The welding points of the joining may be satisfactory, in so far as these points do not generate the spacings as much as to allow the brazing filler metal to flow downward. These parts may be continuous, partial and spotty. The body part and fins joined in the 2nd stage are disposed in a furnace and are joined by brazing in a 3rd stage. The brazing filler metal to be used for brazing may be not particularly limited; for example, these brazing filler metal may be clad on the fins or the inner side of the body part or may be disposed above the joined parts of the body part and the fins. The need for the jigs to press the body part to the fins on the inner side is eliminated in this way and the production cost of the heat exchanger 1 is reduced. |
