Washing machine and method for controlling the same

A washing machine comprising:

• a main body having an opening;
• a tub inside the main body and having a first washing space into which laundry is received through the opening to be machine washed by the washing machine;
• an auxiliary washing unit having a second washing space, the auxiliary washing unit being seatable on the main body so that, when the auxiliary washing unit is seated on the main body, the auxiliary washing unit is positioned over the opening with the second washing space opening upward and extending below the opening to thereby be positioned to contain water to hand wash laundry in the second washing space, the tub being configured to contain water discharged from the second washing space;
• a drainage unit configured to drain water contained in the tub;
• and
• a control unit configured to control the drainage unit.

A method of controlling a washing machine that includes a main body having an opening, a tub inside the main body and having a first washing space to receive laundry through the opening to be machine washed by the washing machine, a door configured to open and close the opening, an auxiliary washing unit having a second washing space, the auxiliary washing unit being seatable on the main body so that, when the auxiliary washing unit is seated on the main body, the auxiliary washing unit is positioned over the opening with the second washing space opening upward and extending below the opening so that the second washing space is thereby positioned to contain water to hand wash laundry in the second washing space, and a water supply unit configured to supply water into the second washing space, the tub being configured to contain water discharged from the second washing space, the method comprising:

• determining whether to start water supply into the second washing space of the auxiliary washing unit;
• supplying water into the second washing space of the auxiliary washing unit when the determining whether to start determines that the water supply is to be started;
• determining whether to stop the supplying water into the second washing space of the auxiliary washing unit;
• and
• stopping the supplying water supply into the second washing space of the auxiliary washing unit when the determining whether to stop determines that the supplying water is to be stopped.

A method of controlling a washing machine that includes a main body having an opening, a tub inside the main body and having a first washing space to receive laundry through the opening to be machine washed by the washing machine, an auxiliary washing unit having a second washing space and being seatable on the main body so that, when the auxiliary washing unit is seated on the main body, the auxiliary washing unit is positioned over the opening with the second washing space opening upward and extending below the opening so that the second washing space is thereby positioned to contain water to hand wash laundry in the second washing space, the tub being configured to contain water discharged from the second washing space of the auxiliary washing unit, and a drainage unit configured to drain the water contained in the tub, the method comprising:

• receiving, by the washing machine, a drainage signal or a reuse signal;
• draining the water contained in the tub when the drainage signal is received by the washing machine;
• and
• blocking drainage of water contained in the tub when the reuse signal is received by the washing machine.