| 摘要 |
PURPOSE:To prevent a heat collecting pipe from being damaged due to the repetitive heating and cooling of the heat collecting pipe by a method wherein in the titled heat collector having a U-shaped finned heat collecting pipe sealed therein, a forward pipe section and a backward pipe section of the pipe are bridge-connected at their parts to which no fin is attached. CONSTITUTION:The forward pipe section 4 and the backward pipe section 5 of the heat collecting pipe 3 are brazed to the holding parts of connecting members 11 made of metallic rods and are connected to each other at the outside of both ends of the pipe. With the above structure, the thermal stress due to the difference in temperature between the forward pipe section 4 and the backward pipe section 5 generates mainly between the connecting members themselves and forces applied on the pipe sections 4 and 5 are reduced at their parts supported by the connecting members 11. Consequently, no force is applied directly on sections 9 and 10 at which both of the pipe sections 4 and 5 are fixed and the U-shaped bent section 3a to thereby prevent the heat collecting pipe 3 from being damaged. |
