Refrigerator

1. A refrigerator, comprising:

an outer casing;

an inner casing mounted inside the outer casing to define a refrigerating chamber and a freezing chamber;

an evaporator installed between the outer casing and the inner casing to supply cool air;

a separate room positioned in any one of the refrigerating chamber and the freezing chamber;

a passage for guiding the cool air generated by the evaporator directly to the separate room;

a damper installed on the passage to control the cool air supplied to the separate room, the damper including:

a gate installed on the passage and provided with an opening portion;

an opening and closing member installed on the gate to open and close the opening portion of the gate; and

a motor connected to the opening and closing member; and

a heater installed on a circumference of the opening portion of the gate on which the opening and closing member contacts, for preventing the gate and the opening and closing member from being frozen together.

2. The refrigerator of claim 1 , further comprising a blowing fan formed on the passage to blow cool air.

3. The refrigerator of claim 1 , wherein the evaporator supplies cool air to the freezing chamber,

wherein the separate room is a special freezing room positioned in the freezing chamber, and

wherein the passage guides the cool air generated by the evaporator directly to the special freezing room.

4. The refrigerator of claim 3 , wherein the damper supplies cool air to at least one of the freezing chamber and the special freezing room.

5. The refrigerator of claim 4 , wherein the damper intercepts the cool air supplied to the freezing chamber, while the cool air is supplied to the special freezing room.

6. The refrigerator of claim 4 , wherein the damper further comprises a first damper positioned on the passage on the side of the freezing chamber, and a second damper positioned on the passage on the side of the special freezing room.

7. The refrigerator of claim 3 , wherein at least some portion of the passage is a duct for guiding the cool air to the special freezing room.

8. The refrigerator of claim 7 , wherein the passage is formed between the outer casing and the inner casing.

9. The refrigerator of claim 1 , wherein the evaporator comprises:

a first evaporator for supplying cool air to the refrigerating chamber;

a second evaporator for supplying cool air to the freezing chamber; and

the separate room positioned in the refrigerating chamber, wherein the passage guides cool air directly to the separate room.

10. The refrigerator of claim 9 , wherein the inner casing comprises a front cover for forming a front surface of the inner casing, and a rear cover for forming a portion of a rear surface of the inner casing, and at least some portion of the passage is formed between the front cover and the rear cover.

11. The refrigerator of claim 10 , further comprising a rear casing positioned between the inner casing and the outer casing to cover the front cover and the rear cover of the inner casing,

wherein some portion of the passage is a duct installed between the outer casing and the rear casing.

12. The refrigerator of claim 9 , wherein the passage is formed in the inner casing.

13. The refrigerator of claim 12 , wherein at least some portion of the passage is formed by a duct.

14. The refrigerator of claim 9 , further comprising a blowing fan installed on the passage to blow the cool air supplied by the first evaporator to the separate room.

15. The refrigerator of claim 9 , wherein the separate room comprises a cool air hole formed on the upper side to introduce the cool air from the passage.