| 摘要 |
PURPOSE:To prevent heat stored in a hot water tank and an air chamber from dissipating to the atmospheric side at nighttime by encircling the air chamber surrounding the hot water tank by a vacuum chamber and communicating the air chamber with a heat-receiving apparatus through a back heat preventive pipe. CONSTITUTION:At daytime, heat of air within a heat-receiving apparatus 2, which has been heated with solar heat, rises up, and flows into an air chamber 9 through vent holes 12 of a heat insulating diaphragm plate 13 within the back heat preventive pipe 11 to heat a hot water tank 16. The air chamber 9 surrounding the hot water tank 16 is encircled by a vacuum chamber 6. Fur ther, the air chamber 9 and the heat-receiving apparatus 2 are communicated with each other through a back heat preventive pipe 11. As a result, heat within the air chamber 9 is prevented from escaping into the atmosphere or the heat- receiving apparatus 2 at nighttime. |
