Washing machine and pump filter thereof

Abstract

A washing machine includes a tub, a pump case including an inflow chamber into which wash water in the tub flows, a circulation pump chamber provided at one side of the inflow chamber to supply wash water to the tub, and a drain pump chamber provided at the other side of the inflow chamber to discharge the wash water to the outside, and a pump filter installed in the inflow chamber to filter out foreign substances from the wash water. The pump filter includes a first filter part passing wash water flowing into the circulation pump chamber and a second filter part passing wash water flowing into the drain pump chamber, and the first filter part includes a blocking wall preventing the wash water from rectilinearly flowing into the circulation pump chamber and guiding detouring of the wash water.

1 . A washing machine comprising:
 a tub containing wash water;   a pump case including an inflow chamber into which the wash water in the tub flows, a circulation pump chamber provided at one side of the inflow chamber to supply wash water to the tub, and a drain pump chamber provided at the other side of the inflow chamber to discharge the wash water to the outside of a main body; and   a pump filter installed in the inflow chamber to filter out foreign substances from the wash water, wherein   the pump filter includes a first filter part to pass wash water flowing into the circulation pump chamber and a second filter part to pass wash water flowing into the drain pump chamber; and   the first filter part includes a blocking wall to prevent the wash water from rectilinearly flowing into the circulation pump chamber and to guide detouring of the wash water.   
     
     
         2 . The washing machine according to  claim 1 , wherein the pump filter has a hollow cylindrical shape. 
     
     
         3 . The washing machine according to  claim 1 , wherein the pump filter further includes an inflow hole formed at one end thereof to enable wash water to be introduced into the pump filter through the inflow hole. 
     
     
         4 . The washing machine according to  claim 1 , wherein the blocking wall is formed at the center of the first filter part. 
     
     
         5 . The washing machine according to  claim 1 , wherein the first filter part includes a plurality of first collection holes formed at both sides of the blocking wall of the first filter part to filter out foreign substances from the wash water detoured via the blocking wall. 
     
     
         6 . The washing machine according to  claim 1 , wherein the second filter part includes a plurality of second collection holes to filter out foreign substances from the wash water. 
     
     
         7 . The washing machine according to  claim 1 , wherein the pump filter further includes a direction adjustment groove formed to adjust positions of the first filter part and the second filter part within the inflow chamber. 
     
     
         8 . The washing machine according to  claim 1 , wherein the second filter part includes an opening to effectively drain the wash water. 
     
     
         9 . The washing machine according to  claim 1 , wherein the second filter part includes a conical filter part protruding inwardly to effectively drain the wash water. 
     
     
         10 . The washing machine according to  claim 7 , wherein the pump case further includes a direction adjustment rib protruding to be inserted into the direction adjustment groove of the pump filter. 
     
     
         11 . The washing machine according to  claim 1 , wherein:
 the pump filter further includes a head provided with a handle; and   the head is rotatably connected to the first filter part and the second filter part.   
     
     
         12 . The washing machine according to  claim 1 , wherein the pump filter is detachably connected to the inflow chamber of the pump case. 
     
     
         13 . The washing machine according to  claim 1 , wherein bubbles are generated in wash water in the circulation pump chamber of the pump case and the wash water having the bubbles is supplied to the tub. 
     
     
         14 . A washing machine comprising:
 a tub containing wash water;   a pump case including an inflow chamber into which the wash water in the tub flows, a circulation pump chamber provided at one side of the inflow chamber to generate bubbles in wash water and to supply the wash water having the bubbles to the tub, and a drain pump chamber provided at the other side of the inflow chamber to discharge the wash water to the outside of a main body; and   a pump filter detachably installed in the inflow chamber, wherein   the pump filter includes a first filter part including a plurality of first collection holes to filter out foreign substances from wash water flowing into the circulation pump chamber and a second filter part including a plurality of second collection holes having a larger size than the plurality of first collection holes to filter out foreign substances from wash water flowing into the drain pump chamber; and   a blocking wall to guide detouring of the wash water to prevent accumulation and growth of foreign substances in the pump filter is formed between the plurality of first collection holes of the first filter part.   
     
     
         15 . A pump filter having a cylindrical shape and connected to a pump case of a washing machine, the pump filter comprising:
 an inflow hole formed at one end of the pump filter to enable wash water to be introduced into the pump filter through the inflow hole;   a first filter part formed at a part of the circumferential surface of the pump filter to pass the wash water introduced through the inflow hole, and including a blocking wall to change a flow of the wash water and a plurality of first collection holes formed at both sides of the blocking wall to filter out foreign substances from the wash water; and   a second filter part formed at the remaining part of the circumferential surface of the pump filter to pass the wash water introduced through the inflow hole, and including a plurality of second collection holes to filter out foreign substances from the wash water.   
     
     
         16 . The pump filter according to  claim 15 , wherein the plurality of first collection holes has a smaller size than the plurality of second collection holes. 
     
     
         17 . The pump filter according to  claim 15 , wherein an opening to effectively drain the wash water is formed at the second filter part. 
     
     
         18 . The pump filter according to  claim 15 , wherein a conical filter part protruding inwardly to effectively drain the wash water is formed at the second filter part. 
     
     
         19 . The pump filter according to  claim 17 , further comprising a conical filter part protruding inwardly formed at the opening of the second filter part. 
     
     
         20 . The pump filter according to  claim 19 , wherein the conical filter part has an approximately conical shape and includes:
 a first frame part contacting the circumferential surface of the pump filter;   a second frame part formed opposite the first frame part;   a plurality of ribs connecting the first frame part and the second frame part; and   a plurality of third collection holes formed between the plurality of ribs.