Patent ID: 7350527
Filing Date: 2008-04-01
Classification: A47L

Abstract:
1. A filter system for a dishwasher having a floor, a wash pump and a drain pump, the filter system comprising: a sump in the floor having a sidewall and a bottom wall having an inlet leading to the wash pump and an inlet leading to the drain pump; a filter assembly positioned in the sump including: a dishwasher control, and a pressure sensor positioned on the sidewall of the sump to detect accumulation of soil particles on the filter element and connected to the dishwasher control and arranged to activate the drain pump to remove soil particles from the sump when a predetermined accumulation of soil particles is detected, the sensor being arranged to detect that the back wash sprayer is rotating and the dishwasher control is arranged to provide a check filter signal to the user when the sensor fails to detect back wash sprayer rotation; wherein the inlet leading to the wash pump is positioned inside the filter assembly and the inlet leading to the drain pump is positioned outside the filter assembly.