Filtering apparatus for treating ballast water

A filtering apparatus for treating ballast water, comprising:

• a housing having an inlet and an outlet which permits inflow and outflow of the ballast water;
• a filter filtering the ballast water which flows in the housing;
• and
• an automatic washing unit washing away foreign substances adhering to the filter;
• wherein the automatic washing unit comprises:
• a driving unit driving the automatic washing unit in response to a signal of the control unit;
• a suction unit movably connected to the driving unit to suck the foreign substances adhering to the filter;
• and
• an exhaust unit exhausting the foreign substances sucked by the suction unit;
• and
• the housing is constructed so that a housing cover plate coupled to an end of a housing body is removably coupled to the exhaust unit, thus enabling easy assembly, disassembly and maintenance;
• wherein the suction unit comprises a suction rod equipped with a suction nozzle which sucks the foreign substances adhering to the filter, and a core connected to the suction rod to move the sucked foreign substances;
• the driving unit comprises a driving shaft which is connected to the core, the driving shaft being operated by a power source to move the core;
• and
• the core comprises a shaft coupling unit which protrudes from an end thereof coupled to the driving shaft, so that the core is coupled at the shaft coupling unit to the driving shaft via coupling means.