Control method of laundry machine

Abstract

The patent application discloses a control method of a laundry machine provided with a balancer. The method includes a balancing step of at least one time for rotating a drum ( 30 ) at a constant speed for a predetermined time by decelerating the drum ( 30 ) if the drum ( 30 ) is accelerated at a predetermined RPM or more. The balancing step is performed after a rotation speed of the drum ( 30 ) passes through a transient region of the laundry machine ( 100 ).

1 . A control method of a laundry machine provided with a balancer, the control method comprising:
 a balancing step of at least one time for rotating a drum at a constant speed for a predetermined time by decelerating the drum if the drum is accelerated at a predetermined RPM or more, the balancing step performed after a rotation speed of the drum passes through a transient region of the laundry machine.   
     
     
         2 . The control method as claimed in  claim 1 , wherein accelerating step includes a first accelerating step for accelerating the drum to reach a first target RPM, a balancing step for carrying out balancing by decelerating the drum, and a second accelerating step for accelerating the drum to reach a second target RPM. 
     
     
         3 . The control method as claimed in  claim 2 , wherein the first target RPM is set equally to the second target RPM. 
     
     
         4 . The control method as claimed in  claim 3 , wherein first target RPM duration of the first accelerating step is shorter than second target RPM duration of the second accelerating step. 
     
     
         5 . The control method as claimed in  claim 3 , wherein the balancing step is carried out by decelerating the drum immediately after the drum reaches the first target RPM at the first accelerating step. 
     
     
         6 . The control method as claimed in  claim 3 , wherein, after the first accelerating step is carried out, the first target RPM and its duration are determined such that a water content becomes 40% to 60% or less of a weight of laundry loaded into the drum. 
     
     
         7 . The control method as claimed in  claim 3 , wherein the first target RPM and its duration are determined such that water discharge at the first accelerating step is greater than that at the second accelerating step. 
     
     
         8 . The control method as claimed in  claim 3 , wherein the first target RPM and its duration are determined such that water discharge at the first accelerating step is substantially equal to that at the second accelerating step. 
     
     
         9 . The control method as claimed in  claim 3 , wherein maximum noise at the first accelerating step is greater than that at the second accelerating step. 
     
     
         10 . The control method as claimed in  claim 3 , wherein average noise at the second accelerating step is substantially 55 DB or less. 
     
     
         11 . The control method as claimed in  claim 2 , wherein the first target RPM is different from the second target RPM. 
     
     
         12 . The control method as claimed in  claim 11 , wherein the first target RPM is lower than the second target RPM. 
     
     
         13 . The control method as claimed in  claim 12 , wherein, after the first accelerating step is carried out, the first target RPM and its duration are determined such that a water content becomes 40% to 60% or less of a weight of laundry loaded into the drum. 
     
     
         14 . The control method as claimed in  claim 12 , wherein the first target RPM and its duration are determined such that water discharge at the first accelerating step is greater than that at the second accelerating step. 
     
     
         15 . The control method as claimed in  claim 12 , wherein the first target RPM and its duration are determined such that water discharge at the first accelerating step is substantially equal to that at the second accelerating step. 
     
     
         16 . The control method as claimed in  claim 12 , wherein maximum noise at the first accelerating step is greater than that at the second accelerating step. 
     
     
         17 . The control method as claimed in  claim 12 , wherein average noise at the second accelerating step is substantially 55 DB or less. 
     
     
         18 . The control method as claimed in  claim 2 , wherein water discharge at the first accelerating step is greater than that at the second accelerating step. 
     
     
         19 . The control method as claimed in  claim 2 , wherein maximum noise at the first accelerating step is greater than that at the second accelerating step. 
     
     
         20 . The control method as claimed in  claim 2 , wherein average noise at the second accelerating step is substantially 55 DB or less. 
     
     
         21 . The control method as claimed in  claim 1 , wherein the balancing step is carried out to compensate for variation in eccentricity due to water discharge of laundry at the accelerating step. 
     
     
         22 . 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. 
     
     
         23 . 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. 
     
     
         24 . The control method as claimed in  claim 1 , wherein a tub is supported rigidly more than a drum being supported by a suspension assembly.