Washing machine and method of controlling spin-drying thereof

摘要

Disclosed are a washing machine and a method of controlling spin-drying of the washing machine. The method changes the acceleration gradient of the drum passing a resonance point, i.e., the resonance point passing gradient of the drum, when the imbalance of the laundry due to the excessive vibration of the tub is sensed when passing a resonance point region (generally within 100 RPM, approximately 50˜80 RPM, after the entry into the spin-drying cycle) in the spin-drying cycle. Thus the position of the balancer is changed according to the imbalance of the laundry.

主权项

1. A method of controlling spin-drying of a washing machine, the washing machine comprising a tub and a drum, the method comprising:
performing a spin-drying cycle comprising rotating the drum by accelerating, at a first rate of acceleration, to a predetermined first speed in a first mode; sensing whether an excessive vibration of the tub is generated while accelerating to the first speed; when the excessive vibration of the tub is sensed in a resonance point region while accelerating to the first speed, reducing the speed of the drum and then rotating the drum by accelerating, at a second rate of acceleration, to a predetermined second speed in a second mode; sensing whether the excessive vibration of the tub is generated in the second mode; determining, by a controller, whether the drum passes the resonance point region in the second mode; and when it is determined that the resonance point region is passed, performing a spin-drying at a high speed, wherein the first rate of acceleration is different from the second rate of acceleration.