| 摘要 |
PURPOSE:To facilitate to vent the air in a circulating passage by a method wherein a controlling valve to close or open the by-pass pipe communicating the forward pipe from and the return pipe to a solar heat collector to each other is intermittently open at the beginning of the operation of a circulating pump. CONSTITUTION:The circulating pump 5 interposed in the forward pipe 3 is controlled with a temperature difference thermosensor 9 detecting the difference between the temperature of the solar heat collector 1 and that of a heat accumulator 2. A solenoid valve 11 to open the by-pass pipe 10 equipped between the pipe 3 and the return pipe 4 is controlled with a controller 12, which issues the signal related to the signal from the thermosensor 9 in every one minute at the beginning of the operation of the circulating pump. Concretely, by means of the signal from the thermosensor 9, the pump 5 is put into operation and as well as the valve 11 is open in order to vent the air in the piping locating lower than the pipe 10. After the elapse of one minute, the valve 11 is closed. This causes to fill air within the collector 1. After the elapse of another one minute, the valve 11 is open and said air is gradually collected to an air vent valve 13 side and discharged from the valve 13 and an supplementary tank 6. |
