公开(公告)号：US20210269958A1

公开(公告)日：2021-09-02

申请号：US17258330

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Sungwan KIM ,  Jieon KIM ,  Jongseok JUNG

IPC: D06F33/42 ,  D06F39/08 ,  D06F37/30 ,  D06F23/04 ,  H02P27/08 ,  H02M7/5387

Abstract: The present disclosure relates to a laundry treatment machine. A drain laundry treatment machine according to an embodiment of the present disclosure: an inverter converting a direct current (DC) voltage from a converter into an alternating current (AC) voltage based on a switching operation and outputting the converted AC voltage to a drain motor; an output current detector to detect an output current flowing in the drain motor; and a controller to control the drain motor to rotate at a speed lower than a first speed when the output current flowing in the drain motor decreases in a state where a speed of the drain motor is the first speed. Accordingly, it is possible to reduce a pressure in a vortex chamber of the drain pump during dewatering.

公开(公告)号：US20210277563A1

公开(公告)日：2021-09-09

申请号：US17258289

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Junsung KIM ,  Sungwan KIM ,  Chungill LEE

IPC: D06F33/42 ,  D06F34/14 ,  D06F39/08 ,  D06F34/10

Abstract: The present disclosure relates to a laundry treatment machine. A laundry treatment machine according to an embodiment of the present disclosure including an inverter to convert the DC voltage from the converter into an alternating current (AC) voltage based on a switching operation and to output the converted AC voltage to the drain motor; and a controller to control the drain motor to operate at any one of a first speed, a second speed less than the first speed, and a stop when the washing tub motor is accelerated. Accordingly, according to the operation of the washing tub motor, it is possible to efficiently drive the drain motor.