| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal filtration device for a water tank, which is capable of heightening the filtration efficiency of its filter material and reducing the clogging thereof. SOLUTION: The internal filtration device is constituted as follows. A filter unit (U) freely rotatably installed in a filter case (1) includes a rotary shaft (15), water wheels (16, 17) installed on the rotary shaft (15) and rotated by the rotational flow of tank water introduced into the filter case (1), and a filter assembly (18) installed between an uncleaned chamber (31) and a cleaned chamber (32) in the filter case (1). The tank water introduced into the filter case (1) is filtered by the rotating filter assembly (18), and returned to the water tank (V) by the drive of a pump (P). COPYRIGHT: (C)2011,JPO&INPIT
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