| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger tube which has a small-bore pipe and a large-bore pipe formed in an integrated shape without taking a soldering means and moreover which has a high heat exchange rate and also is suitable for reuse. SOLUTION: The heat exchanger tube has a constitution wherein the small- bore pipe is fitted in an integrated shape in a circular-segment-shaped recess formed by depressing a part of the circumferential wall of the large-bore pipe into the hollow part. Moreover, the outer peripheral surface of the small-bore pipe is surrounded in close contact by the inner peripheral surface of the circular-segment-shaped recess, and the two pipes are extended in the integrated state in a desired longitudinal direction.
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