Laundry treatment machine and method for controlling the same
AssigneeLG Electronics Inc.
InventorsJunho Park, Junsung Kim, Kiwook Lee
Life of this patent
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Abstract
The present disclosure relates to a laundry treatment machine and a method for controlling the same. A pump motor may operate according to the steps of starting up the pump motor when operating or stopping the pump motor. Upon restarting, the pump motor may be controlled to start up after being on standby until the rotor stops, and therefore the pump may run normally even in case in which the pump repeatedly stops and runs, and the drainage performance may be improved and wash water may be drained by the operation of the pump regardless of the lift level.
Claims13
A laundry treatment machine comprising:
- a washing tub;
- a main motor to rotate the washing tub;
- a pump;
- a pump motor to operate the pump;
- a pump driving apparatus to drive the pump motor;
- and
- a main controller to control the pump motor to operate separately in a first period during which the pump motor stops, a second period, subsequent to the first period, during which a rotor of the pump motor is aligned, a third period, subsequent to the second period, during which a speed of rotation of the pump motor is increased with a first rising slope, a fourth period, subsequent to the third period, during which the speed of rotation of the pump motor is increased with a second rising slope steeper than the first rising slope, and a fifth period, subsequent to the fourth period, during which the speed of rotation of the pump motor is decreased and then increased again.
A method for controlling a laundry treatment machine, the method comprising:
- initiating the operation of a pump with a pump motor;
- stopping the pump motor during a first period;
- aligning a rotor of the pump motor during a second period;
- increasing a speed of rotation of the pump motor with a first slope during a third period;
- increasing the speed of rotation of the pump motor with a second slope steeper than the first slope during a fourth period;
- decreasing the speed of rotation of the pump motor and then increasing again during a fifth period;
- and
- circulating or draining wash water by controlling the speed or power of the pump motor.
Dependencies are inferred from the claim text.