1, direct cooling type

The natural convection of low temperature on the evaporator surface reduces the temperature in the box, but the temperature is uneven. Power saving, large effective volume under the same volume. The advantages of direct cooling technology are low manufacturing cost, good fresh-keeping effect and low power consumption, but the drawer-free freezer sometimes needs manual defrosting. Direct cooling has the advantages of low power consumption, low noise and low price, and can keep food fresh in cold storage; Slow speed and poor temperature uniformity. Mainly in China and Europe.

2. Air cooled

The air-cooled refrigerator is clean and refreshing, without defrosting, and cold air is forced to blow into the cabinet space through the air duct, which circulates and has uniform temperature. The automatic defrosting humidity of the freezing room is low, and the refrigeration is even to achieve the effect of accurate temperature control, and the food will not freeze together, which greatly reduces the phenomenon of mutual odor. Its disadvantages are high cost and high power consumption of air cooling technology; Food is easy to dry and dehydrate, suitable for wet areas. Power consumption is higher than that of direct cooling type, and the effective volume is small under the same volume. Air-cooled freezing has the advantages of fast freezing speed, no frost (automatic defrosting), food preservation and good temperature uniformity. But the power consumption is high, the noise is high and the price is high. Mainly in the United States, Japan, South Korea and southern China.