| 摘要 |
PURPOSE:To enable to use a heat collecting pump also as a hot-water feed pump, by connecting a heat collecting pipe to an upper portion of a heat accumulating tank, and providing a jet pump in a by-pass pipe by-passing a heat collecting pipe in said heat collecting pipe, and connecting the suction opening of the jet pump to a lower portion of the heat accumulating tank. CONSTITUTION:When the temperature of a heat collector 1 is raised by the solar rays and the temperature difference of a high-temperature sensor 13 and a low- temperature sensor 14 is increased, a three-way valve 11 is communicated with a by-pass pipe 8 through operation of a differential-temperature operated means, so that water discharged from a pump 5 is circulated through the by-pass pipe 8 and a jet pump 9 to the pump 5. Therefore, water in a heat accumulating tank 3 is drawn through a suction pipe 10 by the jet pump 9 and supplied to the heat collector 1 via a pipe 4. Thus, heat is collected by the heat collector 1. On the other hand, when a hot-water feed tap 17 is opened for feeding hot water, pressure in a pipe 6 is lowered and a pressure switch 18 is actuated to shift the three-way valve 11 to a position where it is communicated with a suction pipe 7. Resultantly, hot water at the upper portion of the tank 3 is drawn out and supplied to the tap 17 through operation of the pump 5. |
