Filter assembly for a dishwasher
First Claim
Patent Images
1. An automatic dishwasher for washing utensils according to a cycle of operation, comprising:
- 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 fluidly coupling the treating chamber to the liquid spraying system and defining a recirculation flow path for recirculating the sprayed liquid from the treating chamber to the liquid spraying system; and
a liquid filtering system fluidly coupled to the recirculation flow path and comprising;
a rotating 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 diverter overlying and moveable relative to at least a portion of the upstream surface to form a gap between the diverter and the upstream surface, with a size of the gap varying with a position of the diverter relative to the upstream surface;
a sensor providing an output indicative of a degree of clogging of the rotating filter; and
a controller operably coupled to the diverter and the sensor and configured to move the diverter relative to the upstream surface in response to the sensor output to control the size of the gap based on the degree of clogging.
1 Assignment
0 Petitions
Accused Products
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 rotating filter disposed in the recirculation flow path to filter the liquid.
156 Citations
18 Claims
-
1. An automatic dishwasher for washing utensils according to a cycle of operation, comprising:
-
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 fluidly coupling the treating chamber to the liquid spraying system and defining a recirculation flow path for recirculating the sprayed liquid from the treating chamber to the liquid spraying system; and a liquid filtering system fluidly coupled to the recirculation flow path and comprising; a rotating 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 diverter overlying and moveable relative to at least a portion of the upstream surface to form a gap between the diverter and the upstream surface, with a size of the gap varying with a position of the diverter relative to the upstream surface; a sensor providing an output indicative of a degree of clogging of the rotating filter; and a controller operably coupled to the diverter and the sensor and configured to move the diverter relative to the upstream surface in response to the sensor output to control the size of the gap based on the degree of clogging. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of controlling the operation of an automatic dishwasher having a treating chamber supplied liquid by a liquid spraying system including sprayers, a liquid recirculation system recirculating the supplied liquid back to the liquid spraying system to form a recirculation flow path, a rotating filter located within the recirculation flow path, and a flow diverter located above the rotating filter to define a gap therebetween, the method comprising:
-
spraying liquid within the treating chamber; recirculating the sprayed liquid from the treating chamber to the sprayers for subsequent spraying to define a recirculation flow path; rotating the filter within the recirculation flow path during the recirculating of the liquid; determining a degree of clogging of the filter; and automatically moving the flow diverter relative to the rotating filter based on the degree of clogging of the rotating filter to adjust a size of the gap based on the degree of clogging. - View Dependent Claims (15, 16, 17, 18)
-
Specification