US Patent 10563902 Smart refrigerator including voice recognition

A refrigerator including a main body having a plurality of storage compartments to store food; a door configured to open and close the main body; a door switch configured to detect an opening and closing of the door; a microphone configured to receive a voice of a user; and a controller configured to recognize the voice of the user input from the microphone and extract shopping goods information, wherein the controller extracts the shopping goods information based on the voice of the user input through the microphone when the door is opened.