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US 8,540,822 B2Granted
Control method of a dishwasher
AssigneeLG Electronics Inc.
InventorsJoonho Pyo, Taehee Lee, Simoon Jeon, Gapsu Shin
Life of this patent
Estimating the term…
Abstract
A control method of a dishwasher is provided in which a filter is cleaned by controlling an operation of a washing pump. In this control method, washing fluid pumped by the washing pump back flows and is directed to the filter so as to remove foreign materials accumulated in the filter from the filter.
Claims18
A control method of a dishwasher, the method comprising:
- driving a washing pump to pump washing fluid to direct the washing fluid in a sump into a washing fluid guide;
- driving a draining pump before stopping pumping of the washing fluid, driving the draining pump comprising:
- initiating driving the draining pump after a first set time has elapsed since initiating the pumping of the washing fluid;
- and
- driving the draining pump to adjust a level of the washing fluid stored in the sump while continuing to pump the washing fluid;
- stopping the driving of the washing pump after a second set time has elapsed since initiating the driving of the draining pump to generate a back flow of washing fluid in the washing fluid guide to the washing pump;
- and
- allowing the back flow of washing fluid to splash onto a filter to separate particles from the filter.
5 more elements
A method of controlling a dishwasher, the method comprising:
- initiating a driving of a washing pump so as to direct washing fluid into a washing space;
- when a first set time has elapsed since initiating the driving of the washing pump, initiating a driving of a draining pump;
- when a second set time has elapsed since initiating the driving of the draining pump, interrupting power supplied to the washing pump;
- directing a back flow of washing fluid from a washing fluid guide to a filter provided in a sump so as to dislodge particles from the filter;
- switching a valve in the washing fluid guide to an upper or top nozzle mode when the second set time has elapsed, and
- wherein directing a back flow of washing fluid from a washing fluid guide to a filter comprises:
- providing washing fluid up to a predetermined level in the washing fluid guide in response to a pumping force generated by the washing pump;
- and
- allowing the washing fluid accumulated in the washing fluid guide to flow back to the washing pump and to the filter in the sump when power to the washing pump is interrupted and the pumping force of the washing pump is no longer generated.
6 more elements
A method of controlling a dishwasher, the method comprising:
- performing a pre-washing cycle;
- performing a main washing cycle;
- and
- performing a filter cleaning cycle at least once during the pre-washing cycle and at least once during the main washing cycle,
- wherein performing a filter cleaning cycle comprises:
- setting a valve positioned in a washing fluid guide in a first direction and supplying washing fluid from a sump into the washing fluid guide to a predetermined level in response to a pumping force generated by a washing pump;
- stopping a supply of power to the washing pump to cause the washing fluid accumulated in the washing fluid guide flow back to the washing pump;
- and
- impinging the back flow of washing fluid onto a filter provided in the sump so as to separate particles from the filter.
6 more elements
Dependencies are inferred from the claim text.