Patent ID: 9232882
Filing Date: 2016-01-12
CPC Classification: A47L

Claim Text:
1. A controlling method of a dishwasher comprising a washing compartment, a sump configured to contain water, a steam generator configured to supply steam to the washing compartment, a sump heater configured to heat the water in the sump, an upper rack holding dishes with a smaller washing load and a lower rack holding dishes with a larger washing load, an upper and a lower spraying arm configured to spray washing water toward the upper rack and the lower rack, respectively, the method comprising: performing a washing cycle comprising: rinsing by spraying water toward the upper rack and the lower rack alternately, wherein the performing of the washing cycle further comprises spraying the water by only using the lower spraying arm to additionally and intensively wash an area having a larger washing load if the washing cycle reaches a preset first condition with the sump heater being on, wherein the rinsing is performed in a state of the sump heater being on, and the rinsing comprises spraying the water by using only the lower spraying arm if a preset second condition is reached during the rinsing, wherein the preset first condition is a first temperature of the water contained in the sump and the preset second condition is a second temperature of the water contained in the sump lower than the first temperature, wherein the steam generator is turned on and the sump heater is turned off during the supplying steam, and wherein the spraying the water by only using the lower spraying arm is repeated for a preset time period during which the upper spraying arm does not spray washing water.