Rotating filter for a dishwasher and methods of cleaning a rotating filter
First Claim
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1. A method of cleaning a rotatable filter of a dishwasher, the method comprising:
- scouring a screen of the rotatable filter by introducing a granular agent adjacent the screen during at least one of a rotating of the rotatable filter or a passing of liquid through the rotatable filter;
wherein the scouring is performed while the introduced granular agent is maintained adjacent to the rotatable filter; and
wherein at least some grains of the introduced granular agent have a size greater than the size of filtration perforations of the filter, wherein the filtration perforations are openings through which liquid is passed in order to be filtered by the filter during operation of the dishwasher.
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Abstract
A method of operating a dishwasher having a pump and filter assembly including an impeller adapted to recirculate liquid, a housing defining an interior and exterior, a rotating filter to effect a filtering of the liquid, and a granular agent supply with granular agent cleaning the filter by scouring the filter.
122 Citations
19 Claims
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1. A method of cleaning a rotatable filter of a dishwasher, the method comprising:
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scouring a screen of the rotatable filter by introducing a granular agent adjacent the screen during at least one of a rotating of the rotatable filter or a passing of liquid through the rotatable filter; wherein the scouring is performed while the introduced granular agent is maintained adjacent to the rotatable filter; and wherein at least some grains of the introduced granular agent have a size greater than the size of filtration perforations of the filter, wherein the filtration perforations are openings through which liquid is passed in order to be filtered by the filter during operation of the dishwasher. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of cleaning a rotatable filter provided within a liquid recirculation circuit of a dishwasher, with a shroud spaced from at least a portion of the rotatable filter to define a gap between the shroud and the rotatable filter, the method comprising
introducing a granular agent into the gap between the shroud and the rotatable filter of the dishwasher; - and
while at least some of the granular agent resides within the gap, rotating the rotatable filter or passing liquid through the rotatable filter; wherein the recited rotating of the rotatable filter or the recited passing of liquid through the rotatable filter occurs while the granular agent is within the gap such that cleaning of the rotatable filter occurs; wherein the cleaning is performed by having the granular agent scour a surface of the rotatable filter; and wherein at least some grains of the introduced granular agent have a size greater than the size of filtration perforations of the filter, wherein the filtration perforations are openings through which liquid is passed in order to be filtered by the filter during operation of the dishwasher. - View Dependent Claims (9, 10, 11, 12)
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13. A method of operating a dishwasher having a rotatable filter located within a liquid recirculation circuit where liquid flows through the rotatable filter to effect a filtering of the liquid, the method comprising:
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recirculating, via a recirculation pump, liquid through the liquid recirculation circuit of the dishwasher; rotating the rotatable filter during the recirculating of the liquid; receiving a signal indicative of a degree of clogging of the rotatable filter; determining that the rotatable filter is clogged based on the signal; and positioning a granular agent adjacent the rotatable filter during at least one of the rotating of the rotatable filter or the recirculating of the liquid through the rotatable filter; cleaning the rotatable filter by scouring the rotatable filter with the granular agent, wherein at least some grains of the granular agent have a size greater than the size of filtration perforations of the filter, wherein the filtration perforations are openings through which liquid is passed in order to be filtered by the filter during operation of the dishwasher. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification