Patent ID: 7444842

Claim:
A drum washing machine, comprising: a key input unit receiving an input from a user; a water tub; a rotary tub rotatably provided in the water tub; a detergent feed pipe having a first end connected to the water tub and a second end disposed at an inlet of the rotary tub; a control unit determining whether a detergent used is a powdered detergent or a liquid detergent based on the input from the user; and a detergent feed unit to feed the detergent contained in the water tub into the rotary tub through the detergent feed pipe, the control unit controlling the detergent feed unit to dissolve the detergent before feeding the detergent into the rotary tub in response to a determination from the control unit that the detergent is a powdered detergent; wherein the detergent feed unit comprises a control unit to drive a pump provided at the detergent feed pipe to sufficiently dissolve the powdered detergent and then feed the dissolved powdered detergent into the rotary tub.