| 摘要 |
The present invention relates to a powerless back washing filter apparatus. Provided is the powerless back washing filter apparatus comprising: a housing including an accommodating space inside, including a washing water inlet and a raw water inlet on one end one side and the other side, respectively, and including an outlet on one side of the other end; a hollow filter portion installed in a longitudinal direction of the housing inside the housing, whose outer surface is installed at a distance away from an inner surface of the housing, and in which a plurality of filtering holes are formed in the outer surface; a shaft portion installed in a longitudinal direction of the housing inside the filter portion; and a back washing unit installed in one side of the shaft portion, whose outer circumference surface is in contact with the inner surface of the shaft portion, and moved in a longitudinal direction of the shaft portion due to water pressure when washing water flows in through one of the washing water inlet or the outlet. According to the present invention, the back washing unit is operated by using water pressured to wash the filter portion. Therefore, a separate power for operating the back washing unit is not required. In addition, a component for assisting the same is not required, Therefore, production costs are significantly reduced. Moreover, a structure of the powerless back washing filter apparatus is simple to be miniatured and to be easily maintained/repaired. |
