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 later cook time according to a time required to perform the first cooking;
• and
• performing a second cooking for the later cook time while controlling the output power of the magnetron to rapidly cook the food.

The computer readable medium of claim of 11, wherein the performing of the first cooking comprises:

• operating the magnetron at a maximum output power;
• determining whether an operating time of the magnetron at the maximum output power exceeds a predetermined period of time;
• controlling the output power of the magnetron to be lower than the maximum output power so as to prevent the water from boiling to overflow in response to the operating time exceeding the predetermined period of time;
• sensing boiling of the water through the humidity sensor;
• and
• determining the later cook time based on an elapsed time prior to the boiling of the water in response to the sensing of the boiling of the water by a humidity sensor which senses humidity of the cooking chamber.

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 for a second cook time based on the first cooking operation and the humidity sensor, while controlling the output power of the magnetron to rapidly cook the food.

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 for a second cook time comprises:
• lowering the output power of the magnetron to a second output power to steam boil the food,
• operating the magnetron at the second output power for a portion of the second cook time, and
• operating the magnetron for the remainder of the second cook time after raising the output power of the magnetron to a third output power to rapidly cook the food in response to elapse of the portion of the second cook time, wherein the second cook time is based the first cook time.