| 摘要 |
To simplify a mounting job for a filter and a lid at a water intake port. A filter accommodation chamber of a cylindrical shape forms a water intake port that is provided in a side wall of a stator having therein an impeller rotatably disposed. A filter of a cylindrical shape is placed in the filter accommodation chamber and an opening in the filter accommodation chamber is closed by a lid of a circular shape through either screwing or press-fitting. A flow path is integrally formed with a peripheral wall of the filter accommodation chamber. A bottom portion of the cylindrical filter is formed into an inclined surface. An inclined step portion, which abuts against an edge portion of the inclined surface of filter, is formed in the filter accommodation chamber. In addition, an opening, which communicates with the flow path when the inclined surface edge portion of the cylindrical filter and the inclined step portion abut against each other so that the two are brought into coincidence with each other, is formed in the cylindrical filter. Part of an inner peripheral surface of the filter accommodation chamber and part of an outer peripheral surface of the cylindrical filter may be formed into a flat surface.
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