Refrigerator

A refrigerator comprising:

• a compressor configured to compress a refrigerant;
• an evaporator configured to perform heat exchange using the refrigerant compressed by the compressor;
• an RF output device spaced apart from a part area of the evaporator, and configured to output an RF signal to the evaporator for removing frost on the evaporator;
• and
• a controller configured to control the RF output device,
• wherein the controller is configured to output the RF signal to the evaporator during at least a defrost section,
• wherein during an operation of the RF output device, temperature of a plurality of metal fins of the evaporator is higher than temperature of the frost formed on the metal fins,
• wherein the RF output device comprises a first plate and a second plate, and the evaporator is positioned between the first plate and the second plate,
• wherein a height of the first plate or a height of the second plate is less than a height of the evaporator, and
• wherein the first plate or the second plate is positioned at area corresponding to the lower portion of the evaporator.

A refrigerator comprising:

• a compressor configured to compress a refrigerant;
• an evaporator configured to perform heat exchange using the refrigerant compressed by the compressor;
• an RF output device spaced apart from a part area of the evaporator, and configured to output an RF signal to the evaporator;
• and
• a controller configured to control the RF output device,
• wherein the controller is configured to, by outputting the RF signal, perform a first period in which temperature of a liquid near the evaporator decreases, and a second period in which the temperature of the liquid increases after the first period and is maintained within a predetermined range,
• wherein during an operation of the RF output device, temperature of a plurality of metal fins of the evaporator is higher than temperature of other regions of the evaporator,
• wherein the RF output device comprises a first plate and a second plate, and the evaporator is positioned between the first plate and the second plate,
• wherein a height of the first plate or a height of the second plate is less than a height of the evaporator, and
• wherein the first plate or the second plate is positioned at area corresponding to the lower portion of the evaporator.