Cold air guide structure of ice-making chamber of cold chamber door

A cold air guide structure of an ice-making chamber of a cold chamber door, the structure comprising:

• the cold chamber door;
• an insulation case disposed inside of the cold chamber door, thermally insulated and having an ice-making chamber therein;
• an ice-making unit having an ice maker and an ice bank that are installed in the ice-making chamber, the ice maker icing a supplied water by an ice-making cold air, the ice bank storing ice made by the ice maker;
• an insulation cover for opening and closing the ice-making chamber of the insulation case;
• a cold air inlet port for sucking the ice-making cold air into the ice-making chamber;
• a cold air outlet port for exhausting the ice-making cold air from the ice-making chamber;
• a cold air supply duct defined at a sidewall of a refrigerator body, for supplying an ice-making cold air from a freezing chamber to the cold air inlet port;
• an ice-making cold air guide unit having a flat plate horizontally installed in the ice-making chamber, for guiding the ice-making cold air from the cold air inlet port to a predetermined location.