Refrigerator and method of controlling the same

A method for controlling a refrigerator based on a first reference temperature and a second reference temperature, the method comprising:

• turning off a cold air transmission component when a temperature of a storage compartment becomes equal to or less than the second reference temperature while a cold air generator is operated;
• turning on the cold air transmission component when the temperature of the storage compartment is determined to be equal to or greater than the first reference temperature;
• and
• determining, by a controller, an operating ratio of the cold air transmission component based on an ON time and an OFF time of the cold air transmission component, determining an operating property of the cold air transmission component based on the determined operating ratio of the cold air transmission component, and operating the cold air transmission component at the determined operating property of the cold air transmission component, upon determining that the temperature of the storage compartment is equal to or less than the second reference temperature,
• wherein the controller determines that the operating property of the cold air transmission component based on a first factor which is a difference between a previous operating ratio of the cold air transmission component and a current operating ratio of the cold air transmission component, and a second factor which is a difference between a reference operating ratio, which is previously determined, and the current operating ratio of the cold air transmission component.

A method for controlling a refrigerator having a first storage compartment, a second storage compartment, a cooling fan to provide cold air to the second storage compartment, and a compressor, the method comprising:

• turning off the cooling fan when a temperature of the second storage compartment becomes equal to or less than a second reference temperature while the compressor is operated;
• turning on the cooling fan, when the temperature of the second storage compartment is determined to be equal to or greater than a first reference temperature, wherein the first reference temperature is greater than the second reference temperature;
• determining an operating ratio of the cooling fan based on an ON time and an OFF time of the cooling fan;
• determining a rotational speed of the cooling fan based on the determined operating ratio of the cooling fan;
• and
• in response to determining that the temperature of the second storage compartment is equal to or less than the second reference temperature, operating the cooling fan at the determined rotational speed,
• wherein the rotational speed of the cooling fan is determined based on at least one of:
• a difference between a previous of ratio of the cooling fan and a current operating ratio of the cooling fan, or
• a difference between a reference operating radio, which is previously determined, and the current operating ratio of the cooling fan.