Patent ID: 8220092

Claim:
A method for improving the cleansing effect on non-delicate washing which is to be washed in a washing machine comprising a laundry drum, a drive motor intermittently driving the laundry drum during a washing and rinsing process in alternating directions of rotation, and a speed control device in communication with and controlling the drive motor of the laundry drum, the method comprising: detecting a circumferential speed in m/s of the laundry drum using a speed sensor; controlling, by the speed control device, the drive motor of the laundry drum based on the circumferential speed in m/s of the laundry drum detected by the speed sensor, the controlling including selecting a first phase during the washing and rinsing process and intermittently generating and sending: a first control signal to the drive motor such that the drive motor, based on the first control signal received from the speed control device, accelerates the laundry drum in a first direction of rotation to a first rotational speed such that a first circumferential speed of the laundry drum at the first rotational speed is accelerated to and does not exceed approximately 3.7 m/s, whereby the laundry items adhere to an interior surface of the laundry drum as a result of induced centrifugal force, and a second control signal to the drive motor such that the drive motor, based on the second control signal received from the speed control device, rotates the laundry drum in a second direction of rotation, which is opposite to the first direction of rotation, to a second rotational speed, wherein a second circumferential speed of the laundry drum at the second rotational speed is less than about 1.0 m/s; and successively selecting, by the speed control device, a second phase during the washing and rinsing process and intermittently generating and sending: a third control signal for the drive motor such that the drive motor, based on the third control signal received from the speed control device, accelerates the laundry drum in the first direction of rotation to a third rotational speed for high washing mechanics, wherein a third circumferential speed of the laundry drum at the third rotational speed for high washing mechanics lies in an interval of about 1.1 to 1.6 m/s, and a fourth control signal for the drive motor such that the drive motor, based on the fourth control signal received from the speed control device, accelerates the laundry drum in the second direction of rotation to a fourth rotational speed for high washing mechanics, wherein a fourth circumferential speed of the laundry drum at the fourth rotational speed for high washing mechanics lies in an interval of about 1.1 to 1.6 m/s.