| 摘要 |
PURPOSE:To obtain a solar heat collector in which a reflecting film of a heat collecting plate sealed in a maximum diametered section of a glass outer tube and a heat ray adsorbing film on the surface of a heat pipe display desired properties. CONSTITUTION:The large diametered trunk part of a glass outer tube 1 is cut at points P1, P2, P3... and after an internal member assembled with a heat pipe 4, a heat collecting plate 2 and a support 3 is inserted into the glass tube, the tube is sealed with low melting glass powder, i.e. so called frit. In case a frit sealing process is performed, it is enough to heat only the sealed part to temperatures less than about 600 deg.C in an electrical furnace or a high frequency induction heating device whereby the reflecting film or the heat ray adsorbing film is not thermally damaged, a large scale processing device is not required and the manufacturing cost is reduced. |
