| 摘要 |
PURPOSE:To collect, accumulate and radiate to a room the solar heat during the daytime without any manual operation, and also to improve the heat insulating performance of a building itself under no sunlight conditions in such a manner that when there is sunshine, a metallic hydride in a flat bag body made of sheet metal is heated to release the hydrogen gas in the bag, and when there is no sunlight, the vacuum is restored inside the bag body. CONSTITUTION:A heat collecting and insulating material 10 is sealed in a flat bag made of stainless steel sheets 11, 12, inside of which is filled with heat insulating particles 14 such as pearlite and is made vacuous. When a solar cell 19 is exposed to the sunlight, an electric current flows in an electric heater 16 to heat a metallic hydrate 15 which releases the hydrogen gas in the heat collecting and insulating material 10, and so, the thermal conductivity of the heat collecting and insulating material 10 is increased. When the ambient temperature is lowered in the night and the temperature of a blackened surface 11' becomes 0 deg.C, the temperature of the nearby metallic hydride 15 becomes 0-5 deg.C, resulting in a reduction of the thermal conductivity of the heat collecting and insulating material 10 to provide a high heat insulating performance. |
