US 12,252,832 B2
Washing machine and spin-drying control method for washing machine
Jongmin Lee, Seoul (KR); Byunghyun Moon, Seoul (KR); Sangwook Lee, Seoul (KR); and Youngjong Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/774,376
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Oct. 26, 2020, PCT No. PCT/KR2020/014628
§ 371(c)(1), (2) Date May 4, 2022,
PCT Pub. No. WO2021/091135, PCT Pub. Date May 14, 2021.
Claims priority of application No. 10-2019-0139654 (KR), filed on Nov. 4, 2019; and application No. 10-2019-0139655 (KR), filed on Nov. 4, 2019.
Prior Publication US 2022/0372684 A1, Nov. 24, 2022
Int. Cl. D06F 33/60 (2020.01); D06F 23/04 (2006.01); D06F 37/30 (2020.01); D06F 39/08 (2006.01); D06F 103/24 (2020.01); D06F 103/48 (2020.01); D06F 105/48 (2020.01); D06F 105/56 (2020.01)
CPC D06F 33/60 (2020.02) [D06F 23/04 (2013.01); D06F 37/304 (2013.01); D06F 39/085 (2013.01); D06F 39/088 (2013.01); D06F 2103/24 (2020.02); D06F 2103/48 (2020.02); D06F 2105/48 (2020.02); D06F 2105/56 (2020.02)] 13 Claims
OG exemplary drawing
 
1. A washing machine comprising:
an outer tub configured to receive water;
an inner tub rotatably disposed with respect to a vertical axis of the outer tub, defining an opening at a lower portion, and in fluid communication with the outer tub;
a drain pump configured to be driven by an electric current to thereby drain the water from the outer tub;
a motor configured to provide a rotational force to the inner tub; and
a control unit including a processor and configured to control the drain pump and the motor to perform a spin-drying cycle including a sub spin-drying cycle and a main spin-drying cycle,
wherein the control unit is configured to:
rotate the motor to increase a rotation speed of the inner tub to a preset first target speed during the sub spin-drying cycle to remove moisture from laundry received in the inner tub,
measure the current of the drain pump to measure an amount of water dehydrated from the laundry while the inner tub is rotated,
measure, based on the current of the drain pump being increased and then decreased to or below a preset reference current, the rotation speed of the inner tub, and
change a preset rotation time of the inner tub in the main spin-drying cycle according to the measured rotation speed of the inner tub.