The principle of energy-saving and noise-reducing fan The fan can be separated into two types according to the principle. When the centrifugal fan rotates, the centrifugal force generated will throw the air between the blades to the outer edge of the impeller. Therefore, at the outlet of the outer edge of the fan impeller Pressure is formed at the place where the airflow changes in the direction of movement, and at the same time, a large vortex is generated between the blades, and because the shape of the wind cover is not properly matched with the fan, the airflow forms a local vortex in the outer cover, so the efficiency is only 20-30 %, the general wind consumption is about the motor capacity.

 

The noise reduction fan blade includes a blade body. There is no connecting sleeve connected to the rotating shaft on the blade body. The blade includes short blades and long blades of different lengths. The length ratio of the short blades and the long blades is 1:5 to 1:4, and the short blades Both the long blades and the long blades are arc-shaped blades.

 

The short blades and the long blades are evenly spaced. There is no blade fixing rod on the fan body. One end of the fixed rod is fixed on the connecting sleeve and the other end is fixed on the circumference of the fan blade body. There are grooves or through holes, short blades and long blades. The length ratio is 5:23.

 

The fan blades are arranged with long blades and short blades, so that the fan blades of the same size and the same speed have large air volume and low noise. The installation of fixed rods enhances the fan blades. The overall strength of the fuselage can reduce the eccentricity of the fan blade body. The arrangement of the through holes on the upper part can reduce the weight of the fan blades as a whole, save electricity, and is convenient to manufacture.

 

　　The fan blades are arranged long and short to reduce the bottom noise. The fan blades are arc-shaped blades to increase the air volume. The blades use plastic fan blades to increase the air volume and reduce the bottom noise. I hope that the above can help everyone.