| 摘要 |
PURPOSE:To obtain a solar heat collector having a high heat collecting efficiency with a simple and inexpensive structure by a method wherein the interior of a hollow body having a reverse conical configuration with a transparent top wall is evacuated and a heat collecting bulb, into which a heat medium is supplied and from which the heat medium is discharged, is provided at the central position thereof. CONSTITUTION:The interior of a hollow body 1, having the reverse conical configuration and made of a heat resistive transparent material, is evacuated and a convex lense 1a is formed at the central position of the top wall while a concave reflecting surface 1b is formed by metallizing a silver film 2 or the like onto the inner surfaces of the side wall and the bottom wall of the hollow body 1. A heat medium introducing tube 3 is arranged so as to penetrate the bottom wall of the hollow body 1 and locate the inner end thereof at the vicinity of the central position of the hollow body 1. The hollow heat collecting bulb 4 is secured to the inner end of the heat medium introducing tube 3. A heat medium introducing tube 3, is arranged so as to locate the inner end thereof at the central position of the heat collecting bulb 4. According to this method, a part of incident light beams is refracted by the convex lense 1a while the remainder of the light is reflected by the concave reflecting surface 1b and each of them are converged into the heat collecting bulb 4, whereby the heat may be collected in efficient manner. |
