The outer rotor axial fan is divided into single-phase asynchronous capacitor operation and three-phase asynchronous operation. Single phase capacitor running motors are 120V, 60Hz or 220-240V, 50/60Hz, and three-phase asynchronous running motors are 380V, 50/60Hz.

    External rotor axial flow fan according to the different fan impeller diameter, from 200mm to 900mm, a total of 13 models. The number of blades is 5 pieces, 7 pieces, and the material is low carbon steel and plastic material, with a variety of blade angles and a wide range of choices.

    Depending on the direction of the wind, the fan can also be blown or sucked. Suction wind direction from the blade to the net cover direction; The wind direction from the net cover to the blade direction. In addition, it can also be distinguished according to the degree of concave and convex of the blade at the end of the outer rotor's lead line by blowing or suction, concave to suction, protruding is blowing.

    According to the different level of protection, it can be divided into IP54, IP44 and fully open axial fan. IP54 axial flow fan is mainly used in cold storage, evaporator, air cooler, water cooler and other equipment. IP44 axial flow fan is mainly used in central air conditioning, heaters, heat pumps, dehumidifiers and ventilation and circulation fields. Full open axial flow fan, mainly used in air purifier and other clean environment, humidity is not big ventilation equipment.

    According to the different characteristics of the fan, it can be divided into two kinds of net cover with net cover and without net cover. The net cover has flat plate type, flat plate type, concave net type, wall type and wall type concave net type. The installation mode has the net cover type, the cylinder type round frame type, the air guide surface plate type (cylinder), the air guide cylinder type.