Non-powered drain pump screen device

A non-powered drain pump screen device comprising:

• a drain pump;
• a housing disposed on a front end of the drain pump, and having an inner space, wherein the housing includes an inlet portion defined by an open front portion of the housing, a rear portion located opposite the inlet portion and having an outlet portion connected to the drain pump, left and right side portions, an upper open area adjacent to the inlet portion, a top plate closing an upper portion of the housing, except for the upper open area;
• a lower impeller disposed within the space, wherein the lower impeller includes a lower shaft rotatably coupled to the side portions while extending through lower portions of the side portions, a plurality of coupling holes provided in the lower shaft, and lower blades extending a predetermined length to be movably coupled to the coupling holes;
• an upper impeller extending across both peripheral portions of the top plate and disposed on the top plate, wherein the upper impeller includes an upper shaft having the same configuration as the lower shaft of the lower impeller, a plurality of coupling holes provided in the upper shaft, and upper blades extending a predetermined length to be movably coupled to the coupling holes;
• a chain connecting the lower impeller and the upper impeller;
• an main stopper having a shape of an inclined plate extending from a bottom of the housing to the rear portion of the housing along an inclined line, with a plurality holes being provided in the main stopper, wherein portions of the lower blades dropping due to gravity collide with the main stopper, thereby being prevented from being dislodged from the lower shaft;
• and
• an inclined sub-stopper extending from one peripheral portion of the top plate, wherein portions of the upper blades dropping due to gravity collide with the sub-stopper so as not to be dislodged from the upper shaft.