Method of controlling microwave oven

A computer readable medium encoded with operating instructions for implementing a method of controlling a microwave oven having a cooling fan, and a magnetron to cook food, performed by a computer, the method comprising:

• setting a cooking instruction;
• performing a first cooking while preventing water from boiling to overflow by controlling an output power of the magnetron according to the cooking instruction;
• setting a second cook time according to a time required to perform the first cooking;
• and
• performing a second cooking for the second cook time while steam boiling the food.

A microwave oven comprising:

• a cooking chamber for containing food therein;
• a cooling fan which circulated air in the microwave oven;
• a magnetron which generates microwaves to cook the food;
• a humidity sensor which senses humidity in the cooking chamber;
• and
• a controller which controls a cooking operation of the microwave oven, wherein the controller controls the microwave oven to perform a first cooking operation while preventing water from boiling to overflow by controlling an output power of the magnetron, and to perform a second cooking operation to steam boil the food at a preset output power for a time which is based on the first cooking operation and the humidity sensed by the humidity sensor.

A method of controlling a microwave oven having a cooking chamber for containing food therein, a cooling fan which circulates air, a magnetron which generates microwaves and a humidity sensor which senses humidity of the cooking chamber, the method comprising:

• setting a cooking instruction;
• performing a first cooking for a first cook time comprises:
• operating the magnetron at a maximum output power for a predetermined period of time according to the cooking instruction, and
• lowering an output power of the magnetron to a first output power so as to prevent water from boiling to overflow in response to elapse of the predetermined time;
• determining the first cook time in response to sensing boiling of the water through the humidity sensor;
• and
• performing a second cooking comprises:
• lowering the output power of the magnetron to a second output power to steam boil the water, and
• operating the magnetron at the second output power for a second cook time, wherein the second cook time is based the first cook time.