| 摘要 |
A water filtration system comprises a filter 11, a pump 12 powered by a solar panel 14 and configured to force water through the filter in either of a forward or reverse direction, a pressure sensor 22 configured to measure water pressure on the filtered water side of the filter and a controller 20 configured to control operation of the pump. In a filtering operation, water is passed in a forward direction until a pressure sensor measures that the water pressure on the filtered water side of the filter has dropped to a predetermined level, at which point water is forced through the filter in the reverse direction. Preferably an air blower 30 provides a supply of air bubbles that pass through the filter when water is forced through the filter in a reverse direction. Preferably the solar panel is a photovoltaic cell and the controller includes a maximum power point tracking unit configured to optimize the loading of the photovoltaic cell. Advantageously the water filtration system may be used in remote areas. |
