Refrigerator

A refrigerator comprising:

• a refrigerator body having a food storage space;
• a door opening/closing the storage space;
• a heat exchange chamber provided inside the refrigerator body;
• an evaporator installed inside the heat exchange chamber;
• an ultra-low-temperature storage separably provided in the storage space, the ultra-low-temperature storage disposed in front of the heat exchange chamber;
• and
• a supply unit directly supplying cooling air generated from the heat exchange chamber to the ultra-low-temperature storage, the supply unit comprising:
• a communication opening directly connecting the heat exchange chamber to the ultra-low-temperature storage, the communication opening disposed in front of the evaporator;
• a protrusion guide protruding forwards from a rear surface of an inner case defining the storage space;
• and
• a blowing unit installed inside the communication opening to blow the cooling air to the ultra-low-temperature storage,
• wherein the ultra-low-temperature storage comprises an ultra-low-temperature casing receiving the cooling air discharged through the communication opening, and having a recess in a rear side thereof, such that at least a portion of an outer surface of the protrusion guide is mounted on the recess to directly supply the cooling air in the heat exchange chamber to the ultra-low-temperature storage;
• a temperature sensor detecting a temperature in the ultra-low-temperature casing;
• a front cover covering at least a portion of an upper opening of the ultra-low-temperature casing, the front cover including:
• an upper part covering the portion of the upper opening of the ultra-low-temperature casing when the ultra-low-temperature casing is received in the storage space;
• a front part formed at a front end of the upper part to form a portion of a front surface of the ultra-low-temperature storage;
• and
• a display device installed on the front part to inform a user of the temperature detected by the temperature sensor;
• and
• a controller configured to stop the blowing unit when the temperature detected by the temperature sensor reaches a preset temperature.