| 摘要 |
PURPOSE:To maintain a jointing strength between a tank and a seat plate, by arranging such that the recess of periphery of tank seat plate has a cross-sectional area larger than that of metallic line received therein, and the lower end of the tank is provided with a projection having the cross-sectional area equivalent to the difference of above two cross-sectional areas. CONSTITUTION:A high frequency induction coil 11a provided around the periphery of seat plate 2 is energized for producing an induction current in a metallic wire 10 under an arrangement such that the metallic wire 10 is received in a recess 9 defined in the peripheral upper surface of seat plate 2, the projecting piece 12 of lower end surface 1b of tank is inserted into the recess 9 until it abuts against the metallic wire 10, and the tank 1 and the seat plate 2 are pressed each other. In this manner, the metallic wire 10 serves to fuse the inner surface of recess 9, while at the same time fusing the projecting piece 12 from the lower end thereof. As a result, the recess 9 is filled with a resin melted out of the projecting piece 12 to mix with another resin fused from the interior of recess 9. In consequence, the tank 1 and the seat plate 2 are favorably joined together in a wide area after being cooled down. Thus, a heat exchanger is obtained which is free from leaky water and durable as well. |
