US 9,809,923 B2
Laundry treatment machine and method of operating the same
Minkyeong Lee, Changwon-si (KR); Hoonbong Lee, Changwon-si (KR); and Hamin Song, Changwon-si (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Oct. 8, 2013, as Appl. No. 14/48,990.
Claims priority of application No. 10-2012-0111788 (KR), filed on Oct. 9, 2012.
Prior Publication US 2014/0096327 A1, Apr. 10, 2014
Int. Cl. D06F 39/08 (2006.01); D06F 33/02 (2006.01); D06F 37/30 (2006.01); D06F 39/00 (2006.01)
CPC D06F 39/087 (2013.01) [D06F 33/02 (2013.01); D06F 37/304 (2013.01); D06F 39/003 (2013.01); D06F 2202/085 (2013.01); D06F 2202/10 (2013.01); D06F 2204/065 (2013.01); D06F 2204/086 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of operating a laundry treatment machine that processes laundry via rotation of a tub, the method comprising:
performing a primary sensing of an amount of laundry within the tub;
supplying water to a first water level within the tub;
sensing the level of water within the tub;
performing a secondary sensing of the amount of laundry within the tub;
judging whether the laundry includes dry laundry or wet laundry using the primarily sensed amount of laundry, the secondarily sensed amount of laundry, and the sensed water level value,
wherein each of the primary amount of laundry sensing and the secondary amount of laundry sensing includes:
accelerating a rotational velocity of the tub during an accelerated rotating section;
rotating the tub at a constant velocity during a constant velocity rotating section; and
calculating the amount of laundry in the tub based on a difference between an average current command value to rotate the motor during the accelerated rotating section and an average current command value to rotate the motor during a calculating section of the constant velocity rotating section,
wherein the constant velocity rotating section is divided into a stabilizing section to stabilize the tub and the calculating section to add up current command values for sensing of amount of laundry,
wherein a length of the stabilizing section is changed based on the average current command value during the accelerated rotating section, and
wherein the average current command value during the constant velocity rotating section is calculated based on the current command values during the calculating section.