Primary filter cleaning system for a dishwasher
First Claim
1. A dishwasher incorporating a primary filter cleaning system for removing food debris from recirculated water, the dishwasher comprising:
- a dishwasher tub, a sump formed in a lower portion of the dishwasher tub, and a pump having a pump inlet in communication with the sump and a pump discharge, the sump having a bottom, an open top, and an upper periphery;
a collection chamber formed in the bottom of the sump;
a filter disposed over the open top of the sump and having an opening therein for communication with the collection chamber;
a stationary manifold about the upper periphery of the sump and in fluid communication with the pump, the manifold having a plurality of spaced spray nozzles, each of the nozzles aligned for spray contact with the filter; and
wherein when water is pumped from the sump to the manifold, the water is sprayed across the filter to remove any food debris thereon, with the debris proceeding into the collection chamber.
2 Assignments
0 Petitions
Accused Products
Abstract
A dishwasher incorporates a primary filter cleaning system for removing food debris from circulated wash water. The dishwasher having a sump formed in the bottom and a wash pump having an inlet in communication with the sump. A collection chamber is formed through the bottom of the sump and a filter is situated over the top of the sump. The filter has an opening for depositing debris in the collection chamber. A stationary manifold is situated about the upper periphery of the sump and is aligned with the discharge of the pump. The manifold has multiple spaced spray nozzles, with each of the nozzles being aligned for spray contact with the filter. When water is pumped from the sump to the manifold, the water is sprayed across the filter to remove any food debris on the filter. The debris is then swept into the collection chamber.
74 Citations
19 Claims
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1. A dishwasher incorporating a primary filter cleaning system for removing food debris from recirculated water, the dishwasher comprising:
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a dishwasher tub, a sump formed in a lower portion of the dishwasher tub, and a pump having a pump inlet in communication with the sump and a pump discharge, the sump having a bottom, an open top, and an upper periphery;
a collection chamber formed in the bottom of the sump;
a filter disposed over the open top of the sump and having an opening therein for communication with the collection chamber;
a stationary manifold about the upper periphery of the sump and in fluid communication with the pump, the manifold having a plurality of spaced spray nozzles, each of the nozzles aligned for spray contact with the filter; and
wherein when water is pumped from the sump to the manifold, the water is sprayed across the filter to remove any food debris thereon, with the debris proceeding into the collection chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a dishwasher to clean debris from a primary filter, the method comprising:
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pumping filtered water to a stationary manifold situated about the filter and having a plurality of spaced nozzles aligned toward the filter; and
spraying the filtered water from the plurality of spaced nozzles across the filter to move the debris from the filter to a collection chamber.
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12. A method of controlling the flow of circulated, filtered water in a dishwasher having at least one spray arm and a stationary manifold situated about the primary filter of the dishwater, comprising the steps of:
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pumping filtered water through a pump;
selectively directing the filtered water to at least one of the stationary manifold or the at least one spray arm. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification