Patent ID: 8783056

Claim:
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.