Patent ID: 11885056
Assignee: LG ELECTRONICS INC.
Field: Other consumer goods (Other fields)
Classification: CPC D | IPC D

Claim 12:
13. A laundry treatment machine comprising:
a washing tub;
a driver to drive the washing tub;
a drain pump;
a motor to drive the drain pump a converter to output a direct current (DC) power;
an inverter to convert the DC power at a DC terminal into an alternating current (AC) power based on a switching operation and to output the converted AC power to the motor; and
a controller configured to start dewatering after a first period from completion of drainage in response to a lift being at a first level, and to start the dewatering after a second period from the completion of the drainage in response to the lift being at a second level greater than the first level,
wherein the second period is longer than the first period,
wherein the lift is a difference between a water level of a water introduction part through which water flows into the drain pump and a water level of a water discharge part through which the water is discharged out of the drain pump,
wherein in response to the lift being at the first level during the drainage, the controller is configured to drive the motor with a power within a first allowable range based on a first power, without decreasing over time, from a first time point after the drainage is started until the completion of the drainage, and
in response to the lift being at the second level, the controller is configured to drive the motor with a power within the first allowable range based on the first power, without decreasing over time, from the first time point until the completion of the drainage.