| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-power supply water purifying system capable of operating a screw conveyor type filtering material cleaning device applied in a filter device even at a site without commercial power supply.SOLUTION: In a water purifying system comprising: a filter device 2 having a filtering material layer 4 at the inside of a filter tank 3; a raw water pump to supply raw water into the filter tank 3; and a screw conveyor type filtering material cleaning device 25, the filter device 2 is arranged within a treating water tank 1, the raw water pump whose driving source is a manual power or electric power generated by a solar battery is used and a human power is transmitted to a screw 27, for example with sprockets 31, 33 and a chain 34, as the driving means of the screw 27 of a screw conveyor. |
