| 摘要 |
PURPOSE:To maintain always surely the heat exchange rate, by a method wherein a metallic tape is bent and wound on a pipe in order that many slits which were formed at the prescribed spaces from side edge to nearly center part in the width direction, become vertical to the outer periphery surface of the pipe. CONSTITUTION:A coil 5 of metallic tape on which many slits are formed at the prescribed intervals from one side edge to the nearly center part in a width direction, is wound spirally on the circumference of the pipe 2. Accordingly, fins 1 are divided in the strip type, because slits 3 are formed radially centering the axis center of the pipe 2. When high temperature fluid which flows in the pipe 2 is cooled by heat dissipation, at the outer periphery side of the pipe 2 standing vertically, air of which temperature is increased rises in the axial direction of the pipe 2 through slits 3, and the up-flow effect is generated, and stagnated parts will not be generated, and the heat exchange effect is maintained, and dust attaching to fins 1 are prevented. |
