| 摘要 |
<p>A water pump (10) which uses water flow to compress air to pump water, the pump having a water inlet (11), a first flow passageway (12), a water outlet (13), and a discharge outlet (15) through which pumped water discharges from the pump, the first flow passageway (12) having a chamber (16) of larger cross-sectional area than the flow passageway (12), a first valve (17) in the chamber (16) which moves between a closed position where it prevents water from flowing through the outlet (13), and an open position and which is moved to it closed position by the pressure of water flowing into the chamber, a second flow passageway (18) communicating with the first flow passageway (12), and which has a second valve (19) which moves between a closed position preventing water from flowing through the second passageway, and an open position, an air chamber (20) communicating with the second flow passageway (18) and downstream from the second valve (19), a third flow passageway (21) communicating with the second flow passageway (18) between the second valve (19) and the air chamber (20), and which communicates with the discharge outlet, and which has a third valve (22) moveable between a closed position preventing pumped water from passing through the discharge outlet, and an open position, and means to move the first valve to its open position.</p> |
