Refrigerator and control method of refrigerator

A method for controlling a refrigerator, the method comprising:

• performing a first defrosting operation of an evaporator while operating a heater, the evaporator being provided in a case and configured to supply cold air while heat-exchanging with air;
• determining, based on a temperature of the evaporator reaching a first temperature, that the first defrosting operation is completed, and turning off the heater;
• detecting a pressure differential using a single differential pressure sensor, wherein the pressure differential is a difference between pressures between an inlet for receiving air from a storage compartment and an outlet for discharging air into the storage compartment;
• and
• performing a second defrosting operation as an additional defrosting operation of the evaporator based on the detected pressure differential being greater than a predefined pressure after the first defrosting operation,
• wherein the second defrosting operation is operated after the first defrosting operation, and
• wherein the second defrosting operation comprises operating the heater until the temperature of the evaporator reaches a second temperature that is different from the first temperature.