| Class |
Direct
Cooling
(Natural convection method) |
Indirect
Cooling
(Forced circulation method) |
| Characteristics |
Cools down
a refrigerator with cold air from cooling
system through natural convection. Natural
defrosting by simply stopping cooling system. |
Cools down
a refrigerator with cold air by forced circulation.
Electrical heater in the cooling system operates
at a regular interval to defrost. |
| Advantages |
Low power
consumption, low noise.
No separate operation is necessary. |
Temperature
distribution is uniform within a refrigerator. |
| Disadvantages |
Manual defrosting
is necessary.
(Stored food needs to be stored elsewhere
while defrosting) Temperature distribution
is not uniform within a refrigerator. |
High power consumption, high noise.
|
| Notes |
Small models.
Popular in Europe |
Medium and larger models. Popular in U.S.A./Japan
|