Filter assembly and foreign substance discharge device including same

A foreign substance discharge device comprising:

• a filter assembly including a housing configured to define a flow path for allowing sewage to move in a first direction or a second direction opposite to the first direction, a plate inserted into the housing and formed therein with a through-hole, and a plurality of protrusions protruding from the plate in the second direction;
• a pump configured to selectively move the sewage in the second direction;
• a tank for storing the sewage when the sewage is moved in the first direction or the second direction;
• and
• a pipe into which the filter assembly is inserted to communicate with the pump to provide a movement path for the sewage, wherein
• the through-hole includes:
• a main hole formed in a center of the plate;
• and
• a plurality of spray holes arranged to surround the main hole,
• the pipe includes:
• an inlet pipe configured to guide the sewage from an outside of the tank to an inside of the tank;
• and
• a first pipe having one end communicating with the pump and an opposite end through which the sewage is discharged to the outside of the tank, and
• the inlet pipe is branched from a portion of the first pipe positioned between the filter assembly and the opposite end of the first pipe.