Mixed flow fans are also called diagonal flow fans. At first glance, mixed flow fans are no different from axial flow fans. In fact, the air intake of mixed flow fans is along the axis, but the air outlet is along the diagonal direction of the axis and the vertical axis. Because the blades and outer cover of this fan are called conical, the wind pressure is higher. Under the same size and other comparable performance, the centrifugal fan has lower noise than the axial fan