| 摘要 |
PURPOSE:To simplify a pump control system by a method wherein stopping and starting of a circulating pump is controlled by a flow amout detector provided in a part of a flow path for the heat collector. CONSTITUTION:A heat exchanger 8 in the hot chamber 2 of the solar heat collector 1 and the heat exchanger 7 in the heat accumulating tank 4 of the collector 1 are connected by a sending pipe 9 and a returning pipe 10 while the flow amount detector 12 is provided in a part of the flow path 3a of a heat collecting unit 3. When sun beams are projected against the heat collector 1, water temperature in the heat collecting unit 3 is risen and a natural circulation of high-temperature water, being sent to the hot chamber 2, and the low-temperature water in the hot chamber 2, which is being sent to the heat collecting unit 3, is generated. When the flow amount of this circulation has arrived at a value higher than a set value, the detector 12 operates the circulating pump 11. According to this method, a heat medium in the heat exchangers 7, 8 and pipes 9, 10 is circulated forcibly by the pump 11, the heat medium is heated and it heats the water in the heat accumulating tank 4 in the heat exchanger 7. On the other hand, when the amount of sunshine is reduced, the natural circulation is stopped and the detector 12 stops the operation of the pump 11. |
