Washing machine and control method thereof

1. A washing machine comprising:

at least one magnet attached to an auxiliary wash tub detachable from a main wash tub;

a switching device configured to output a detection signal when the at least one magnet approaches within a preset range to the switching device; and

a controller configured to determine whether the auxiliary wash tub is installed based on whether the detection signal of the switching device is output, and control a component in the washing machine based on the determination of whether the auxiliary wash tub is installed,

wherein the controller is configured to control the components in the washing machine to perform a common washing course for the auxiliary wash tub and a main wash tub when the controller determines that the auxiliary wash tub is normally installed and receives a control command for a washing course from the user.

2. The washing machine of claim 1 , wherein the controller is configured to determine at least one of whether the auxiliary wash tub is installed and whether the auxiliary wash tub is properly installed based on the number of times of the detection signal being output from the switching device as rotational force is provided through a driving device.

3. The washing machine of claim 1 , wherein the controller is configured to determine that the auxiliary wash tub is installed based on the number of times of the detection signal from the switching device, and determine whether the auxiliary wash tub is properly installed based on the number of times of the detection signal being output from the switching device as the auxiliary wash tub is rotated at preset rotation speed for a preset period of rotation time.

4. The washing machine of claim 1 , wherein the controller is configured to determine a position of the at least one magnet based on the detection signal output from the switching device, and control a position of a knob provided at the auxiliary wash tub based on the determined position of the at least one magnet.

5. The washing machine of claim 1 , further comprising: a sensor part attached to an upper portion of a tub provided in the washing machine and configured to detect whether fall out through a top of an auxiliary wash tub while the auxiliary wash tub is rotated.

6. The washing machine of claim 5 , wherein the sensor part comprises two infrared ray (IR) sensors located opposite each other in an upper portion of the tub.

7. The washing machine of claim 5 , wherein the controller is configured to determine whether laundry accommodated in the auxiliary wash tub deviates based on a detection result through the sensor part, and when it is determined that the laundry deviates, control a component in the washing machine to supply water to the auxiliary wash tub.

8. A control method of a washing machine, the control method comprising:

detecting whether a detection signal is output as at least one magnet attached to an auxiliary wash tub detachable from a main wash tub and a switching device attached to an upper portion of a tub approach within a preset range;

determine at least one of whether the auxiliary wash tub is installed and whether the auxiliary wash tub is properly installed based on the detection of the detection signal; and

controlling components in the washing machine to perform a common washing course for the auxiliary wash tub and a main wash tub when the controller determines that the auxiliary wash tub is normally installed and receives a control command for a washing course from the user.

9. The control method of claim 8 , wherein the determining comprises:

determining at least one of whether the auxiliary wash tub is installed and whether the auxiliary wash tub is properly installed, based on whether the detection signal is output from the switching device and the number of times of the detection signal being output as rotational force is provided through a driving device.

10. The control method of claim 8 , wherein the determining comprises:

determining that the auxiliary wash tub is installed based on the number of times of the detection signal, and determining whether the auxiliary wash tub is properly installed based on the number of times of the detection signal being output as the auxiliary wash tub is rotated at preset rotation speed for a preset period of rotation time.