In daily life, the cross flow fan, also known as the cross flow fan, was first proposed by French engineer Mortier in 1892. The impeller is multi blade, long cylindrical, and has forward multi wing blades. The airflow passes through the impeller and is influenced by two forces from the blades, so the airflow can reach a long distance without turbulence, and the air output is average. Due to the forced deflection of the airflow inside the impeller, the pressure head is lost significantly and the effectiveness is low. Commonly used for air curtains, air conditioning fans, air conditioning units, etc

In addition, axial flow fans refer to the airflow in the same direction as the axis of the fan blades, such as electric fans and air conditioning outdoor fans, which operate fans using axial flow methods. The reason why it is called "axial flow" is because the gas moves parallel to the axis of the fan. Axial flow fans are commonly used in places with high flow requirements and low pressure requirements.