Patent ID: 8312582
Filing Date: 2012-11-20
Classification: D06F

Abstract:
1. A control method of a washing machine performing a washing operation using bubbles, and including a rotational drum containing laundry, a water tub and a bubble generating device positioned outside the water tub to generate bubbles into the water tub, the method comprising: supplying washing water containing detergent into a space between a lower portion of the rotational drum and a lower inner surface of the water tub such that a top surface of the washing water containing detergent reaches a predetermined first level lower than the laundry; stopping the supply of the washing water containing detergent when the top surface of the washing water containing detergent reaches the predetermined first level, and controlling the bubble generating device to generate bubbles between the water tub and the rotational drum; performing a washing operation to wash the laundry input into the rotational drum, using the bubbles; and determining whether the top surface of the washing water containing detergent reaches a predetermined second level lower than the predetermined first level as the washing operation is performed, and supplying a washing water such that the top surface of the washing water containing detergent reaches the predetermined first level when it is determined that the top surface of the washing water containing detergent reaches the predetermined second level, wherein the generating of the bubbles is performed when rotating the rotational drum at a washing RPM or less, the washing RPM generating a centrifugal force smaller than an acceleration of gravity.