[0001] Pre-coating filter device

A pre-coating filter device comprising:

• a filtration tank comprising a raw water inlet through which raw water flows on one side, and a drain port at the bottom;
• a top cover coupled to the upper part of the filtration tank and comprising a coupling hole through the middle part;
• a purified water discharge pipe coupled to the coupling hole of the top cover;
• a purified water storage space unit coupled to the lower part of the top cover and located within the filtration tank, and comprising a communication pipe connected to the central part;
• a filter coupling plate body coupled to the lower part of the purified water storage space unit and comprising a plurality of coupling holes through;
• a pre-coating filter coupled to the coupling hole of the filter coupling plate body;
• and
• a filter rotation unit for detaching foreign materials adhered to the pre-coating filter by applying a rotational force to the filter coupling plate body and shaking the pre-coating filter
• wherein the filter rotation unit comprises:
• a rotational motor,
• an eccentric shaft including one side coupled to a driving shaft of the rotational motor and rotating integrally with it,
• a crank arm hinged to the other side of the eccentric shaft and moving in a straight line, and
• a core shaft flange including one side hinged to the other side of the crank arm and the other side coupled to the communication pipe of the purified water storage space unit so as to rotate the purified water storage space unit forward and reverse by a predetermined angle.