Dishwasher with a motor driven filter backflush system and associated backflush method

摘要

A dishwasher has a wash chamber and sump disposed below the wash chamber, wherein wash fluid supplied to the wash chamber collects in the sump. A main pump is configured to drawn wash fluid from the sump and supply the wash fluid to the wash chamber, for example via spray arm assemblies. A filter is operably disposed to filter the wash fluid recirculated by the main pump. A backflush line has an outlet disposed downstream of the filter, and a backflush pump is configured to supply backflush fluid through the backflush line against the filter. A reservoir separate from the sump is provided and sized to hold a measured amount of fluid. The backflush pump draws the backflush fluid from the reservoir at a defined time.

主权项

1. A dishwasher, comprising:
a wash chamber; a sump disposed below said wash chamber, wherein wash fluid supplied to said wash chamber collects in said sump; a main pump configured to draw wash fluid from said sump and supply the wash fluid to said wash chamber; a filter operably disposed to filter the wash fluid recirculated by said main pump; a backflush line having an outlet disposed downstream of said filter; a backflush pump configured to supply backflush fluid through said backflush line against said filter; a reservoir sized to hold a measured amount of fluid, said backflush pump configured with said reservoir to draw the backflush fluid from said reservoir at a defined time, and said reservoir fluidly separate from said sump except for the backflush fluid drawn by said backflush pump.