| 摘要 |
PURPOSE:To efficiently absorb solar energy when solar light radiates and automatically prevent thermal loss from heat collection fins when solar light does not shine by forming a heat collecting tube which is a heat medium passage separately from heat collecting plates so that the heat collecting plates are tightly coupled to the tube when they receive solar light, while they are separated therefrom when solar light does not shine. CONSTITUTION:The interior 2 of an outer tube 1 formed by a light permeating material such as glass or the like is maintained in a pressure reduced state as much as possible. The heat collecting tube 3 which is a heat medium passage penetrating through the interior of the outer tube 1 is sealed hermetically at both ends 4 and 5. These two heat collecting plates 10 and 11 are mutually disposed on a plane, and fixed to each other at end parts 12, 13, 14 and 15 close to the outer tube 1. When the heat collecting plates 10 and 11 receive radiation of solar light and the temperature thereof increases, thermal expansion is caused. The bent end parts 16 and 17 are used as fixed ends, and other ends 18 and 19 are tightly coupled to heat collecting terminals 20 and 21 possessed by the heat collecting tube 3, and heat amount collected to the heat collecting plates 10 and 11 are transmitted to the heat collecting tube. |
