Patent ID: 9587345
Date: 2017-03-07
CPC Classifications: D06F

Claim:
1. A tub cleaning method of a drum-type washer comprising: a water storing step in which washing water flows into a tub to be stored in the tub; a steeping step in which steam is supplied into the tub and a drum; and a cleaning step in which the washing water in the tub circulates along an entire inner peripheral surface of the tub by controlling a rotational velocity of the drum to clean the entire inner peripheral surface of the tub, wherein a rotational velocity of the drum in the cleaning step is greater than a rotational velocity of the drum set in a washing or rinsing operation and smaller than a rotational velocity of the drum set in a water-extracting operation, and wherein a centrifugal force generated by the rotational velocity of the drum in the cleaning step is greater than a centrifugal force generated by the rotational velocity of the drum set in the washing or rinsing operation and smaller than a centrifugal force generated by the rotational velocity of the drum set in the water-extracting operation.