Rotating filter for a dishwashing machine
First Claim
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1. A dishwashing machine comprising:
- a tub at least partially defining a washing chamber;
a spray arm located within the washing chamber;
a sump fluidly coupled to the washing chamber and provided below the spray arm for collecting fluid and soil particles;
a wash pump including an impeller fluidly coupling the sump to the spray arm to form a recirculation flow path;
a cylindrical rotating filter enclosing a hollow interior, the cylindrical rotating filter provided in the recirculation flow path and having an outer surface and an inner surface defining the hollow interior; and
a flow diverter provided within the recirculation flow path, and the flow diverter having a tip spaced apart from the outer surface of the cylindrical rotating filter so as to define a gap; and
wherein the rotation of the impeller advances fluid through the recirculation flow path such that the fluid passes through the outer surface of the cylindrical rotating filter into the hollow interior, and rotation of the cylindrical rotating filter increases the speed of fluid advanced through the gap relative to the speed of the fluid prior to entering the gap.
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Abstract
A dishwasher with a tub at least partially defining a washing chamber, a liquid spraying system for spraying liquid within the washing chamber, a liquid recirculation system defining a recirculation flow path, and a liquid filtering system. The liquid filtering system includes a rotating filter disposed in the recirculation flow path to filter the liquid.
117 Citations
17 Claims
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1. A dishwashing machine comprising:
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a tub at least partially defining a washing chamber; a spray arm located within the washing chamber; a sump fluidly coupled to the washing chamber and provided below the spray arm for collecting fluid and soil particles; a wash pump including an impeller fluidly coupling the sump to the spray arm to form a recirculation flow path; a cylindrical rotating filter enclosing a hollow interior, the cylindrical rotating filter provided in the recirculation flow path and having an outer surface and an inner surface defining the hollow interior; and a flow diverter provided within the recirculation flow path, and the flow diverter having a tip spaced apart from the outer surface of the cylindrical rotating filter so as to define a gap; and wherein the rotation of the impeller advances fluid through the recirculation flow path such that the fluid passes through the outer surface of the cylindrical rotating filter into the hollow interior, and rotation of the cylindrical rotating filter increases the speed of fluid advanced through the gap relative to the speed of the fluid prior to entering the gap. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A dishwashing machine comprising:
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a tub at least partially defining a washing chamber; a spray arm located in the washing chamber; a sump fluidly coupled to the washing chamber and positioned below the spray arm for collecting fluid and soil particles; a housing in fluid communication with the sump and the spray arm, the housing having an inner chamber; a cylindrical rotating filter enclosing a hollow interior and positioned in the inner chamber and fluidly dividing the inner chamber into a first part that contains filtered soil particles and a second part that excludes filtered soil particles and operable to rotate about a rotational axis, the cylindrical rotating filter having an outer surface; a wash pump including an impeller operably coupled to the cylindrical rotating filter; and a flow diverter positioned in the inner chamber, the flow diverter having a tip spaced apart from the outer surface of the cylindrical rotating filter so as to define a gap; and wherein the rotation of the impeller advances fluid through the cylindrical rotating filter into the hollow interior and during rotation of the cylindrical rotating filter, such that the speed of the fluid advanced through the gap is increased relative to the speed of the fluid prior to entering the gap. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification