Washing machine and control method thereof

A washing machine comprising:

• a detergent supply device;
• a tub;
• a water supply device for supplying water to the detergent supply device and the tub, the water supply device including:
• a plurality of water supply pipes connected to the detergent supply device and the tub, and
• a water supply valve for controlling opening and closing of the plurality of water supply pipes;
• a flow rate sensor disposed in one or more of the plurality of water supply pipes and configured to measure a flow rate of the water in the one or more of the plurality of water supply pipes in which the flow rate sensor is disposed;
• and
• a processor for controlling the water supply device, wherein the processor is configured to:
• obtain the flow rate of the water in the one or more of the plurality of water supply pipes in which the flow rate sensor is disposed,
• calculate a flow velocity of the water in the one of more of the plurality of water supply pipes based on the obtained flow rate, and
• estimate a total flow rate of the water in the plurality of water supply pipes based on the calculated flow velocity.