| 摘要 |
<p>A heat exchanger provided with tubes (2) for flowing a medium and tanks (4), performs heat exchange of the medium by heat conducted to the tubes, has the tubes and the tanks assembled to form a heat exchanger core (1), and has the heat exchanger core brazed into one body, wherein the tubes (2) are formed by shaping a plate-shaped material (200), have beads (202) which are formed by bending the material, and have a sacrifice layer (210) disposed on the outer surfaces of the tubes; the heat exchanger core (1), excluding at least the tubes, is provided with a brazing material which fills recessed portions (203) on the outer surfaces of the tubes which are formed when the beads are formed; and the brazing material (R) which melts from the heat exchanger core at the time of integral brazing fills the recessed portions on the outer surfaces of the tubes. The brazing material (R) is formed to melts from the tanks, melts from fins which are separately disposed with the brazing material, or melts from a replaced brazing material which is disposed on the heat exchanger core.</p> |
