Dishwasher with a motor driven filter backflush system and associated backflush method
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United States of America Patent
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Mar 10, 2015
Grant Date -
Dec 13, 2012
app pub date -
Jun 8, 2011
filing date -
Jun 8, 2011
priority date (Note) -
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Abstract
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.
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