Control method of laundry machine

Abstract

A control method of a laundry machine is disclosed. The control method of a laundry machine comprising a balancer includes a step configured to determine an irregular vibration region of the laundry machine and a balancing step implemented at least one time before a rotation speed of a drum enters the irregular vibration region, while the rotation speed is passing the irregular vibration region and after the rotation speed passes the irregular vibration region.

1 . A control method of a laundry machine comprising a balancer, the control method comprising:
 a step configured to determine an irregular vibration region of the laundry machine; and   a balancing step implemented at least one time before a rotation speed of a drum enters the irregular vibration region, while the rotation speed is passing the irregular vibration region and after the rotation speed passes the irregular vibration region.   
     
     
         2 . The control method as claimed in  claim 1 , wherein the irregular vibration region is determined to be generated if a maximum drum displacement or more in a RPM band lower than the transient region or a maximum drum displacement or more of a steady state step in a RPM band higher than the transient region is generated. 
     
     
         3 . The control method as claimed in  claim 2 , wherein the irregular vibration is generated in a RPM band higher than the transient region. 
     
     
         4 . The control method as claimed in  claim 1 , wherein the irregular vibration is generated in a RPM band of 350 to 100 RPM. 
     
     
         5 . The control method as claimed in  claim 1 , wherein the irregular vibration is determined to be generated, if an average drum displacement in the transient region, +20% to −20% of the average drum displacement in the transient region or ⅓ or more of a maximum drum displacement in a natural frequency is generated. 
     
     
         6 . The control method as claimed in  claim 1 , wherein the step of balancing the ball is carried out before the rotation speed of the drum belongs to the irregular vibration region. 
     
     
         7 . The control method as claimed in  claim 6 , wherein the balancing speed in the step of balancing the ball is maintained at any one of 350 rpm to 400 rpm. 
     
     
         8 . The control method as claimed in  claim 6 , wherein the balancing speed in the step of balancing the ball is maintained at 380 rpm. 
     
     
         9 . The control method as claimed in  claim 1 , wherein the step of balancing the ball is carried out while the rotation speed of the drum is passing through the irregular vibration region. 
     
     
         10 . The control method as claimed in  claim 9 , wherein the balancing speed in the step of balancing the ball is maintained by at least one of 350 rpm to 1000 rpm. 
     
     
         11 . The control method as claimed in  claim 10 , wherein the balancing speed in the step of balancing the ball is maintained at 600 rpm. 
     
     
         12 . The control method as claimed in  claim 1 , wherein the step of balancing the ball is carried out after the rotation speed of the drum passes through the irregular vibration region. 
     
     
         13 . The control method as claimed in  claim 12 , wherein the balancing speed in the step of balancing the ball is selected from a speed region suitable for balancing. 
     
     
         14 . The control method as claimed in  claim 13 , wherein the step of balancing the ball is carried out by the rotation speed of the drum, which belongs to at least one of 200 rpm to 800 rpm. 
     
     
         15 . The control method as claimed in  claim 14 , wherein the step of balancing the ball is carried out by the rotation speed of the drum, which belongs to 380 rpm. 
     
     
         16 . The control method as claimed in  claim 14 , wherein the drum is rotated at a constant speed for a predetermined time after the rotation speed of the drum passes through the irregular vibration region. 
     
     
         17 . 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. 
     
     
         18 . 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. 
     
     
         19 . The control method as claimed in  claim 1 , wherein a tub is supported rigidly more than a drum being supported by a suspension assembly.