| CPC A47L 15/4206 (2013.01) [A47L 15/4208 (2013.01); A47L 15/4219 (2013.01); A47L 15/4225 (2013.01); B01D 29/03 (2013.01); B01D 29/112 (2013.01); B01D 29/13 (2013.01); B01D 29/17 (2013.01); B01D 29/6415 (2013.01); B01D 29/6476 (2013.01); B01D 2201/02 (2013.01); B01D 2201/0415 (2013.01); B01D 2201/0423 (2013.01)] | 25 Claims |
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1. A dishwashing appliance comprising:
a tub defining a dishwashing chamber having a tub floor therein;
a spray system having one or more distribution devices within said dishwashing chamber;
a recirculation pump operable to flow dishwashing fluid to said spray system;
a drainage pump operable to flow dishwashing fluid mixed with food debris during dishwashing operation to a drainage pipe; and
a filtration assembly in fluid communication with said spray system, said recirculation pump, and said drainage pump for filtration of said dishwashing fluid that has circulated through said dishwashing chamber, said filtration assembly positioned at bottom of said dishwashing chamber through a recess formed by said tub floor thereof, said filtration assembly further comprising:
a lid having a first side and a second side, positioned at top of said filtration assembly and above said recess of said tub floor to form a gap therebetween around a periphery of said lid to allow said dishwashing fluid to flow into said filtration assembly;
a filter frame coupled to said second side of said lid defining a filtration chamber, said filter frame configured for attaching one or more filter screens thereon through which said dishwashing fluid flows into said filtration chamber for filtration; and
a sump housing having an open top portion through which said filter frame is disposed, and a base portion having a recirculation intake port in fluid communication with said recirculation pump via a recirculation pump inlet port and a recirculation pump outlet port, and a debris collection chamber in fluid communication with said drainage pump and said drainage pipe via a drainage pump port and a drainage pipe port, wherein
when said dishwashing fluid is extracted by said recirculation pump from said filtration assembly by filtering through said filtration chamber to said recirculation pump via said recirculation intake port and said recirculation pump inlet port, and into said spray system via said recirculation pump outlet port therefrom, said dishwashing fluid circulates through said dishwashing chamber and flows back into said filtration assembly via said gap around said periphery of said lid, with said food debris proceeding into said debris collection chamber.
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