2. The installation of the former is more complicated.

3. The previous motor is usually connected to the fan through a shaft, and the latter motor is usually located inside the fan.

4. The former is usually installed in the import and export of air conditioning units, boiler drums, induced draft fans, etc. The latter is usually installed in the middle of the duct or at the front end of the duct outlet. A centrifugal fan is a driven fluid machine that relies on mechanical energy input to increase gas pressure and deliver gas side by side. Centrifugal fans are widely used for ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings. Ventilation and ventilation of boilers and industrial furnaces; Cooling and ventilation of air conditioning equipment and household appliances; Drying and selection of cereals; Wind tunnel wind source and inflating and propulsion of hovercraft, etc. An axial fan is a airflow with the same direction as the fan blade axis, such as an electric fan, and the fan outside the air conditioner is a fan that operates in axial mode. The reason it is called "axial flow" is that the gas flows parallel to the fan shaft. Axial fans are usually used in situations with high flow requirements and low pressure requirements. Axial fans fix the position and move the air. Independent of the price of the axial fan.