Refrigerator and method of controlling the same

A method of controlling a refrigerator, the method comprising:

• performing a preliminary operation, when the refrigerator is turned on or a defrosting operation is finished;
• operating a cool air supply means with a predetermined output value during the preliminary operation;
• determining whether a constant temperature control start condition is satisfied during the preliminary operation;
• operating a cool air supply means with a predetermined output when it is determined that the constant temperature control start condition is satisfied;
• a controller determining the output of the cool air supply means based on a difference between a set temperature and a current temperature of a storage compartment sensed by a temperature sensor while the cool air supply means operates with the predetermined output;
• and
• the controller operating the cool air supply means with the determined output.

A method of controlling a refrigerator, the method comprising:

• operating a cool air supply means with a predetermined first output value;
• stopping the cool air supply means when a temperature of a storage compartment reaches an off-reference temperature lower than a set temperature of the storage compartment;
• a controller determining the output of the cool air supply means to a second output value lower than the predetermined first output value based on a current temperature of a storage compartment sensed by a temperature sensor when the temperature of the storage compartment reaches a predetermined temperature;
• and
• the controller operating the cool air supply means with the determined output.