Dishwasher with filter assembly
First Claim
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1. A dishwasher for treating utensils according to a cycle of operation, comprising:
- a tub at least partially defining a treating chamber for receiving utensils for cleaning;
a sump fluidly coupled to the tub and collecting liquid supplied to the tub;
a recirculation pump comprising an impeller having an inlet fluidly coupled to the sump and an outlet fluidly coupled to the tub to recirculate liquid from the sump to the treating chamber;
a filter having an upstream surface and a downstream surface, and fluidly separating the sump and the outlet; and
at least one flow diverter rotating about the upstream surface or the downstream surface;
wherein liquid in the tub collects in the sump and is recirculated by actuating the recirculation pump such that the liquid in the sump is drawn through the filter and is expelled through the outlet to the tub and the rotation of the flow diverter generates a shear force acting on the upstream surface or the downstream surface to effect a cleaning of the upstream surface or the downstream surface.
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Abstract
A dishwasher with a tub at least partially defining a treating chamber, a liquid spraying system, a liquid recirculation system defining a recirculation flow path, and a liquid filtering system. The liquid filtering system includes a filter disposed in the recirculation flow path to filter the liquid.
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Citations
33 Claims
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1. A dishwasher for treating utensils according to a cycle of operation, comprising:
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a tub at least partially defining a treating chamber for receiving utensils for cleaning; a sump fluidly coupled to the tub and collecting liquid supplied to the tub; a recirculation pump comprising an impeller having an inlet fluidly coupled to the sump and an outlet fluidly coupled to the tub to recirculate liquid from the sump to the treating chamber; a filter having an upstream surface and a downstream surface, and fluidly separating the sump and the outlet; and at least one flow diverter rotating about the upstream surface or the downstream surface; wherein liquid in the tub collects in the sump and is recirculated by actuating the recirculation pump such that the liquid in the sump is drawn through the filter and is expelled through the outlet to the tub and the rotation of the flow diverter generates a shear force acting on the upstream surface or the downstream surface to effect a cleaning of the upstream surface or the downstream surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A dishwasher for treating utensils according to a cycle of operation, comprising:
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a tub at least partially defining a treating chamber; a liquid spraying system supplying a spray of liquid to the treating chamber; a liquid recirculation system recirculating the sprayed liquid from the treating chamber to the liquid spraying system to define a recirculation flow path; a filter having an upstream surface and a downstream surface and located within the recirculation flow path such that the sprayed liquid passes through the filter from the upstream surface to the downstream surface to effect a filtering of the sprayed liquid; and a first artificial boundary moving over at least a portion of the downstream surface or the upstream surface to form an increased shear force zone therebetween; wherein liquid passing between the first artificial boundary and the filter applies a greater shear force on the downstream surface or the upstream surface than liquid in an absence of the first artificial boundary. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification