Abstract: At present, the majority of fans on the market adopt a single-layer structure design. For single-layer fans, there are problems such as high noise and short air supply distance. A fan with double-layer blades is proposed, and the method of physical experiment is used, and performance analysis and research are carried out by comparing with the prototype blades. According to experimental study, at the same noise level, the air volume of the double-layer fan blade is slightly larger than that of the original fan blade, and the air volume of the double-layer fan blade is raised by around 7~8 m³/min compared with the prototype. The double-layer fan blade is less noisy than the prototype one, under the same air volume condition.

Key words: Electric fan, Double-layer blades, Performance research