| 摘要 |
PURPOSE:To prevent water from staying in the system by a method wherein a compressed air supply device for discharging water from a solar heat collector or pipes by introducing compressed air into the system at the time of stoppage of heat collecting operation is provided. CONSTITUTION:Compressed air proportional to the size of the system is stored in an air tank 13 at a predetermined pressure constantly. When the heat collecting operation is stopped due to the stoppage of the operation of a circulation pump 3, an electromagnetic valve 7 closes and an electromagnetic valve 8 opens. Accordingly the compressed air in the air tank 13 is transferred to a pipe 4, the heat collector 1 and a pipe 5 and the water is collected in an open type heat storage tank 2. When an operation command is given to the circulation pump 3, the electromagnetic valve 8 closes and the electromagnetic valve 7 opens to start the heat collecting operation. |
