Filter cleaning assembly for a dishwasher appliance

A filter cleaning assembly for a dishwasher appliance, the dishwasher appliance comprising a cylindrical filter screen positioned within a sump and a wash pump assembly for urging wash fluid through a supply conduit, the filter cleaning assembly comprising:

• a filter cleaning manifold positioned proximate the cylindrical filter screen and in fluid communication with the supply conduit;
• one or more vertical spray arms extending along a vertical direction adjacent the cylindrical filter screen, 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;
• and
• a plurality of inner cleaning ports defined in the filter cleaning manifold within a filtered region and being configured to circulate the wash fluid within the filtered region.

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;
• 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;
• one or more vertical spray arms extending along the vertical direction adjacent the cylindrical filter screen, 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;
• and
• a plurality of inner cleaning ports defined in the filter cleaning manifold within the filtered region and being configured to circulate the wash fluid within the filtered region.