Refrigerator

1. A refrigerator comprising:

a main body including a wall and a storage compartment formed by the wall, the wall comprising an inner box, an outer box, and insulation provided between the inner box and the outer box;

a door rotatably coupled to the main body configured to open and close the storage compartment, and including an ice-making chamber provided in a front surface of the door and separated from the storage compartment;

a cooling chamber provided inside a cooling chamber case and having a cooler configured to generate cooling air, the cooling chamber case buried in the insulation; and

a cooling air duct configured to connect the ice-making chamber and the cooling chamber to supply the cooling air generated by the cooler to the ice-making chamber.

2. The refrigerator of claim 1 , further comprising an auxiliary door configured to open and close the ice-making chamber,

wherein the ice-making chamber is accessible by opening the auxiliary door in a state that the door is closed.

3. The refrigerator of claim 1 , wherein an auxiliary door is rotatably coupled to the door in a direction different from a rotational direction of the door.

4. The refrigerator of claim 1 , wherein an auxiliary door and the door are rotatable in a similar rotational direction and the auxiliary door covers an entire front surface of the door.

5. The refrigerator of claim 1 , wherein the cooling air duct includes a supply duct configured to supply cooling air of the cooling chamber to the ice-making chamber, and a collecting duct configured to collect air of the ice-making chamber in the cooling chamber.

6. The refrigerator of claim 5 , wherein:

the supply duct includes a main body supply duct provided in the main body and a door supply duct provided in the door; and

the main body supply duct and the door supply duct are connected to each other when the door is closed and separated from each other when the door is opened.

7. The refrigerator of claim 6 , wherein:

an inlet of the main body supply duct is connected to the cooling chamber;

an outlet of the door supply duct is connected to the ice-making chamber; and

an outlet of the main body supply duct and an inlet of the door supply duct are connected to each other when the door is closed.

8. The refrigerator of claim 5 , wherein:

the collecting duct includes a main body collecting duct provided in the main body and a door collecting duct provided in the door; and

the main body collecting duct and the door collecting duct are connected to each other when the door is closed and separated from each other when the door is opened.

9. The refrigerator of claim 8 , wherein:

an inlet of the door collecting duct is connected to the ice-making chamber;

an outlet of the main body collecting duct is connected to the cooling chamber; and

an outlet of the door collecting duct and an inlet of the main body collecting duct are connected to each other when the door is closed.

10. The refrigerator of claim 1 , further comprising:

an ice maker disposed in the ice-making chamber and configured to make ice; and

an ice bucket disposed in the ice-making chamber and configured to store the ice generated by the ice maker.

11. The refrigerator of claim 10 , wherein:

the door includes a dispenser configured to supply ice stored in the ice bucket to the outside; and

the ice bucket includes a mover configured to transfer ice to the dispenser.

12. The refrigerator of claim 1 , further comprising a blower fan disposed in the cooling chamber and configured to circulate cooling air between the ice-making chamber and the cooling chamber through the cooling air duct.

13. The refrigerator of claim 1 , wherein the cooler includes at least one of a vaporizer and a thermoelement.