Air cooling has a fan, automatic defrosting, and no ice.
Direct cooling, no fan, ice, manual defrosting.
Direct cooling: also known as natural convection of cold air. The refrigerator has an evaporator, and the size of the evaporator is reasonably matched according to the size of the room and the temperature requirements. The cooling method is to cool the food by natural convection of cold air.
Air cooling: It is equipped with a finned evaporator and a set of air duct circulation components. The fan motor will form an up and down cycle of the air in the box after being cooled by the evaporator to achieve the purpose of refrigeration. Since the cold air flow is blown in, it will not cause frost to be absorbed from the stored food, so the air cooling is also called frost-free.
Due to the different refrigeration methods, the main performance of direct cooling and air cooling is also different: direct cooling has low power consumption, low noise, low price, and keeps refrigerated food fresh; but it is slow, the temperature uniformity is poor, and manual defrosting is required.
Air-cooled freezing has fast speed, no frost (automatic defrost), keeps food fresh, and has good temperature uniformity; however, it consumes more power than direct cooling, is noisy, and is expensive.