Drive unit for dish washing machines

A dish washing machine comprising:

• a sump for receiving wash water;
• a pump housing disposed in the sump, the pump housing having a washing impeller located therein;
• a flow channel housing disposed to cover a top of the pump housing, the flow channel housing having a first bottom surface to form a first solid waste chamber into which a portion of the wash water pumped out from the washing impeller is introduced;
• a filter housing coupled onto the flow channel housing, the filter housing having an opening arranged above the first solid waste chamber and a second bottom surface to form a second solid waste chamber;
• and
• an arm holder disposed above the flow channel housing, the arm holder having a filter, which covers both tops of the first and second solid waste chambers,
• wherein the first and second solid waste chambers communicate with each other in the vicinity of the inlet/outlet port which is for allowing wash water to be introduced into the first solid waste chamber therethrough when a washing operation is performed and for allowing solid waste to be discharged out of the first solid waste chamber therethrough when a draining operation is performed.

A dish washing machine comprising:

• a sump for receiving wash water;
• a pump housing disposed in the sump, the pump housing having a washing impeller located therein;
• a flow channel housing disposed to cover the top of the pump housing, the flow channel housing having a first solid waste chamber for filtering some of the wash water pumped out from the washing impeller;
• a filter housing having a second solid waste chamber disposed to communicate with the first solid waste chamber, the second solid waste chamber having a bottom surface, which is not level with a bottom surface of the first solid waste chamber such that the bottom surfaces of the first and second solid waste chambers are arranged in the shape of a step;
• and
• an arm holder disposed above the filter housing, the arm holder having a filter disposed corresponding to the first and second solid waste chambers,
• wherein the first and second solid waste chambers communicate with each other in the vicinity of the inlet/outlet port which is for allowing wash water to be introduced into the first solid waste chamber therethrough when a washing operation is performed and for allowing solid waste to be discharged out of the first solid waste chamber therethrough when a draining operation is performed.

A dish washing machine comprising:

• a sump for receiving wash water;
• and
• a housing assembly having a multi-stepped bottom to form a plurality of solid waste chambers arranged side by side with each other and a filter arranged to cover tops of the plurality of solid waste chambers,
• wherein at least two chambers of the plurality of solid waste chambers communicate with each other in the vicinity of the inlet/outlet port which is for allowing wash water to be introduced into the first solid waste chamber therethrough when a washing operation is performed and for allowing solid waste to be discharged out of the first solid waste chamber therethrough when a draining operation is performed.