Provide precise temperature control fan systems for cold storage, refrigerated trucks and other cold chain equipment. The axial fan for cold storage adopts anti-condensation design, which can operate continuously without frost in - 25℃ environment; the centrifugal fan for pharmaceutical refrigerator is equipped with high-efficiency filtration components, which can guarantee the cleanliness of the environment for drug storage. The innovative variable angle air supply fan optimizes the airflow organization to make the temperature uniformity inside the refrigerated truck reach ±0.5℃, which is used in vaccine transportation, fresh food distribution and other scenarios to ensure that the cold chain break rate is less than 0.1%.