| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a tube for a heat exchanger capable of preventing damage of a tube caused by erosion in a U-turn flow passage part.SOLUTION: The tube for a heat exchanger includes an upstream side linear flow passage part 4A and a downstream side linear flow passage part 4B connecting an inlet part 2 and an outlet part 3 and through which the medium flows, and a U-turn flow passage part 4C for making a U-turn of the medium between the flow passages. An arc-shaped protrusion part 6 protruded in an arc shape toward an inner side of the tube and changing the flow direction of the medium flowing from the upstream side linear flow passage part 4A so as to make it flow into the downstream side linear flow passage part 4B is provided in the U-turn flow passage part 4C.</p> |
