# US 8,783,056 B2 · Refrigerator

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- Number: US 8,783,056 B2
- Document ID: US8783056B2
- Status: Granted
- Kind: B2
- Application number: 12/296,884
- Filed: 2007-04-12
- Published: 2010-06-24
- Granted: 2014-07-22
- Earliest claimed: 2006-04-14
- Assignees: LG Electronics Inc.
- Applicants: Ung-Su Kim
- Inventors: Ung-Su Kim
- Web page: https://patentgrep.com/patent/US8783056B2

## CPC

- F25D 17/065: {with compartments at different temperatures}
- F25D 11/04: specially adapted for storing deep-frozen articles (F25D11/02 takes precedence)
- F25D 25/025: {Drawers}
- F25D 2317/061: through special compartments
- F25D 2317/0681: Details thereof
- F25D 2317/0682: Two or more fans
- F25D 2400/30: Quick freezing
- F25D 2400/36: Visual displays
- F25D 2700/121: of particular compartments
- F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B)

## Abstract

A refrigerator includes: a refrigerator body having a food storage space; a door opening/closing the storage space; a heat exchange chamber provided inside the refrigerator body and in which an evaporator is installed; an ultra-low-temperature storage separately provided in the storage space; and a supply unit directly supplying cooling air generated from the heat exchange chamber to the ultra-low-temperature storage.

## Claims

### Claim 1

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.

### Claim 2 (depends on 1)

The refrigerator according to claim 1, wherein the storage space is a freezing chamber located corresponding to the evaporator, and the protrusion guide is formed in a rear side of the freezing chamber between the heat exchange chamber and the ultra-low-temperature storage.

### Claim 3 (depends on 1)

The refrigerator according to claim 1, further comprising:
a guide member provided in a side of a freezing chamber at a position where the ultra-low-temperature storage is formed, the guide member guiding forward/rearward sliding of the ultra-low-temperature casing; and
a flange guide extending on both upper portions of the ultra-low-temperature casing and sliding along the guide member.