Cooking apparatus and control method thereof

A cooking apparatus comprising:

• a case;
• a cooking chamber formed inside the case;
• a camera configured to obtain an image inside of the cooking chamber, the camera having a lens;
• a transparent member disposed in front of the lens of the camera so that the camera obtains the image inside of the cooking chamber through the transparent member;
• a camera cooling fan configured to blow air toward the camera;
• a motor configured to rotate the camera cooling fan;
• and
• a controller configured to control the camera and the motor,
• wherein the controller is further configured to:
• operate the camera to obtain a first image inside of the cooking chamber;
• identify first foreign substance-related information of the lens of the camera or the transparent member based on the obtained first image, the first foreign substance-related information including a ratio of an area occupied by foreign substance to an entire area of the obtained first image;
• determine whether the foreign substance at least partially blocks the lens or the transparent member based on the identified first foreign substance-related information;
• control the motor to perform a first cleaning mode, in which the camera cooling fan is rotated at a first rotation speed for a first rotation time to remove the foreign substance that at least partially blocking the lens or the transparent member;
• and
• in response to the determining that the foreign substance has not been removed after the first cleaning mode is performed, control the motor to perform a second cleaning mode, in which the camera cooling fan is rotated at a second rotation speed for a second rotation time.