| 摘要 |
PURPOSE:To prevent clogging of an orifice and to facilitate cleaning thereof so as to increase the heat collecting amount per the circulating flow amount by providing a side path having an orifice at one position of a solar system to which a plurality of units is connected in series. CONSTITUTION:The water supply header 2 of a first unit A is connected to a flow water manifold 9 outside a box 5 through a side path 10. The side path 10 is provided with an orifice 11 or a valve 12. When a heat collecting pump (b) is stopped, water in a heat collecting pipe is flowed down on the side of the box 5 and a supply water header 1 is set lower than the flow water header 2 and a supply side end of each unit A is set lower than the flow water side end to flow water to the supply water manifold 9. During the operation of the heat collecting pump a part of the supply water from the side path 10 flows into the flow water header 2, but its amount is small because the orifice 11 or the valve 12 is provided in the side path 10. Further, when the valve 12 is closed, the heat collecting amount per the circulating flow amount can be increased. |
