Patent ID: 9615719
Date: 2017-04-11
CPC Classifications: A47L

Claim:
1. A method of controlling a dishwasher having a washing chamber to wash dishes; a sump concavely formed at a lower portion of the washing chamber to collect water used in washing; a cylindrically shaped microfilter having an open top and an open bottom disposed at the sump to filter out debris produced when the dishes are washed; and a cylindrically shaped ultrasonic generator to radiate ultrasonic waves toward the microfilter, the method comprising: supplying water to the washing chamber; spraying water in the sump arranged at a lower portion of the washing chamber onto dishes through a nozzle to wash the dishes; discharging water used in washing the dishes from the sump to outside; disposing the ultrasonic generator in the microfilter; cleaning the microfilter by radiating ultrasonic waves outward in a radial direction from the ultrasonic generator disposed within the microfilter toward water contained in the sump to transfer the ultrasonic waves to the microfilter; and draining water remained in the sump after cleaning the microfilter.