Washing machine and method of controlling spin-drying thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsChan Woo Park, Sang Ho Seo, Seok In Hong, Jae Won Lee, Do Yeon Kim, Dong Woo Shin
Life of this patent
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Abstract
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.
Claims19
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.
A method of controlling spin-drying of a washing machine, the washing machine comprising a tub and a drum, and performs a washing cycle, a rinsing cycle and a spin-drying cycle, the method comprising:
- determining whether the spin-drying cycle is a final spin-drying cycle;
- draining water at an inside of the tub if it is determined as the final spin-drying cycle;
- performing a spin-drying through a first mode of rotating the drum by accelerating the drum, at a first rate of acceleration, to a first speed that is set in advance;
- sensing whether an excessive vibration of the tub is generated in the first mode;
- 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 switching to a second mode of rotating the drum by accelerating the drum, at a second rate of acceleration, to a second speed different from the first speed;
- 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, when a spin-drying error of the first mode occurs, additional water is not supplied to the drum between switching from the first mode to the second mode,
- wherein the first rate of acceleration is different from the second rate of acceleration.
A washing machine comprising:
- a tub;
- a drum rotatably installed in the tub;
- a vibration sensor to sense an excessive vibration of the tub generated by an imbalance in a first control mode and in a second control mode;
- and
- a control unit to control a spin-drying cycle in the first control mode by accelerating a speed of the drum, at a first rate of acceleration, to a first speed, and
- when the vibration sensor senses the excessive vibration of the tub in a resonance point region while accelerating to the first speed, the control unit controls the spin-drying cycle in the second control mode by reducing the speed of the drum and then accelerating the speed of the drum, at a second rate of acceleration, to a second speed, and
- the control unit determines whether the drum passes the resonance point region in the second mode,
- wherein, when the control unit determines that the resonance point region is passed, the control unit performs the spin-drying cycle at a higher speed than the first and second speed,
- wherein the first rate of acceleration is different from the second rate of acceleration.
Dependencies are inferred from the claim text.