Control method of laundry machine

Abstract

A control method of a laundry machine is disclosed. A control method of a laundry machine comprising a spinning cycle includes a sensing step configured to sense a rotation speed (rpm) of a motor while increasing a pulse duty of the motor during the spinning cycle and a determining step configured to determine bubble generation inside a tub based on the sensed pulse duty and rotation speed.

1 . A control method of a laundry machine comprising a spinning cycle, the control method comprising:
 a sensing step configured to sense a rotation speed (rpm) of a motor while increasing a pulse duty of the motor during the spinning cycle; and   a determining step configured to determine bubble generation inside a tub based on the sensed pulse duty and rotation speed.   
     
     
         2 . The control method as claimed in  claim 1 , wherein the determining step determines bubble generation based on comparing an increasing rate of the pulse duty with an increasing rate of the rpm of the motor. 
     
     
         3 . The control method as claimed in  claim 2 , wherein the determining step determines that bubble generates, in case the increasing rate of the pulse duty is different from the increasing rate of the rpm of the motor. 
     
     
         4 . The control method as claimed in  claim 2 , wherein the determining step determines that bubble generates, in case the increasing rate of the rpm of the motor is a preset value or less comparing with the increasing rate of the pulse duty. 
     
     
         5 . The control method as claimed in  claim 1 , wherein a removing step configured to remove the bubbles by auxiliary water supply and drainage to and from the tub, in case the determining step determines that bubbles are generated, is implemented additionally. 
     
     
         6 . The control method as claimed in  claim 5 , wherein the spinning cycle re-starts after the removing step. 
     
     
         7 . The control method as claimed in  claim 1 , wherein an auxiliary rinsing cycle is implemented in case the determining step determines that bubbles are generated. 
     
     
         8 . The control method as claimed in  claim 1 , wherein the laundry machine comprises a driving unit comprising a shaft connected to a drum, a bearing housing to rotatably support the shaft, and a motor to rotate the shaft, and a suspension assembly is connected to the driving unit. 
     
     
         9 . The control method as claimed in  claim 1 , wherein the laundry machine comprises a rear gasket for sealing to prevent washing water from leaking from a space between a driving unit and a tub, and enabling the driving unit movable relative to the tub. 
     
     
         10 . The control method as claimed in  claim 1 , wherein a tub is supported rigidly more than a drum being supported by a suspension assembly.