Patent ID: 7819983
Filing Date: 2010-10-26
Classification: A47L

Abstract:
1. A method of controlling a dishwasher, comprising the steps of: selectively supplying water, received by a passage switching valve, to one of an upper nozzle and a lower nozzle by positioning the passage switching valve in a first fixed state for a first period of time; rotating the passage switching valve such that the passage switching valve becomes fixed in a second state in which water is selectively supplied to the nozzle that was not previously supplied with water in the previous step, wherein a rotational speed of a wash pump supplying water to the passage switching valve is reduced from a first speed to a second speed, less than the first, before the passage switching valve is rotated, and wherein the rotational speed of the wash pump is increased back to the first speed while the passage switching valve is rotating and before the passage switching valve becomes fixed in the second state.