1. The China Cross flow blower uses a relatively long barrel-shaped fan impeller to work. The diameter of this barrel-shaped fan blade is relatively large. Because of the large diameter, a relatively low speed can be used on the basis of ensuring the overall air circulation. , thereby reducing the noise caused by high-speed operation;

　　2. The impeller of the China Cross flow blower has been dynamically balanced: just like the wheel of a car needs to be dynamically balanced, the wind wheel of the air curtain machine also needs to do this work. noise, and prolong the life of the fan.

　　3. The fan blades of the fan are carefully calculated, and the distance between the fan blades is intentionally disordered, presenting a situation of "unequal distance": this is also very simple, it is to try to make the sound produced by the rotating fan wheel and the air " Irregular", becoming "a piece" of wind, rather than wind concentrated in a certain frequency band.

　　4. Use high-quality fan blades of China Cross flow blower: the fan impeller in the air curtain is very long, and it is not recommended to use inferior materials for such a barrel-shaped fan blade.

　　5. Use high-quality China Cross flow blower motor: the wind wheel depends on the motor to make it run. If the motor is of poor quality, it cannot run normally or it is weak to start, it will not work.