Why do Siemens refrigerators have fans? I don't think there are any others

The refrigerator with fan is an intercooled refrigerator, which can enhance the speed of freezing or cooling and reduce the temperature quickly. In addition, it will not cause ice on the inner wall of the refrigerator. Generally, the price of an indirect refrigerator is higher than that of a refrigerator. Of course, the effect is better, it's just a little bit more expensive.