| CPC A47L 15/4208 (2013.01) [A47L 15/4206 (2013.01); A47L 15/4225 (2013.01); B01D 29/085 (2013.01); B01D 29/33 (2013.01); B01D 29/50 (2013.01); B01D 29/6438 (2013.01); B01D 2201/02 (2013.01); B01D 2201/084 (2013.01)] | 20 Claims |
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1. A dishwasher appliance defining a vertical direction, the dishwasher appliance comprising:
a wash tub that defines a wash chamber;
a sump for collecting wash fluid, wherein the sump is defined at least in part by a cylindrical outer sump wall, the cylindrical outer sump wall defining one or more recesses;
a cylindrical filter screen positioned within the sump, the cylindrical filter screen defining a filtered region and an unfiltered region;
a wash pump assembly comprising a wash pump impeller and a supply conduit, the wash pump impeller being configured for urging the wash fluid through the cylindrical filter screen and into the supply conduit; and
a filter cleaning assembly comprising:
a filter cleaning manifold positioned proximate the cylindrical filter screen and in fluid communication with the supply conduit; and
one or more vertical spray arms extending along the vertical direction adjacent the cylindrical filter screen and being received within the one or more recesses of the cylindrical outer sump wall, the one or more vertical spray arms defining a plurality of outer ports in fluid communication with the filter cleaning manifold, the plurality of outer ports being positioned and oriented for directing the wash fluid at least partially along a circumferential direction about the cylindrical filter screen.
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