| 摘要 |
PURPOSE:To enable to collect heat from solar rays in the daytime and to insulate heat in the night with ease, by combining the light transmitting properties of plastics, glass, etc., the light transmitting and heat insulating properties of Freon gas or the like to the conduction heat, and heat insulating properties of heat reflector plates to radiation heat functionally with each other. CONSTITUTION:By opening a tank outlet valve 5, a gas like Freon gas having an extremely low coefficient of thermal conductivity and stored in a tank 4 at a higher pressure than the atmospheric pressure is introduced from a gas charging port 7 into an enclosed space 3 defined by surface members 1, 2 made of a plastics, glass or the like having a high coefficient of light transmissiblility via a gas charging pipe 6. Heat reflector plates 9, which are fixed to respective pins 8 at one ends thereof, connected to the surface member 2 at the other ends and having a bright surface of aluminum or the like that is opened and closed with expansion and contraction of the enclosed space 3 are kept closed. Since conduction of heat is prevented by the enclosed space 3 and the surfaces member 1, 2 and the gas filled in the space 3 have a high coefficient of transmissibility to radiation heat, heat is insulated effectively by disposing the heat reflector plates 9 at the front. On the other hand, in the state that the gas is extracted completely from the space 3, the enclosed space 3 that has been effective in insulating conduction heat and the surface members 1 and 2 are brought into tight contact with each other, so that heat is transmitted efficiently by way of conduction. |
