Compound bending fan blade and fan comprising same

Abstract

The invention discloses a compound bending fan blade. The fan blade is mounted on a wind wheel hub. The fan blades and the wind wheel hub constitute a wind wheel. The wind wheel is mounted on a motor.The motor rotates to drive the fan blades to rotate. Each fan blade has bending change in the rotating direction and the axial direction. A blade front edge and a fan rear edge of each fan blade bendand extend in the rotating direction. Each fan blade comprises a rising section and a dropping section from the blade root to the blade tip, wherein the blade front edge and the blade rear edge of each fan blade extend from the blade root to the blade tip and then to an air outlet to form the rising section, and the rising section extends to reach a peak value and then extends to an air inlet tofrom the dropping section. Each fan blade bends in the rotating direction and the axial direction to form a sickle shape. Each sickle-shaped blade has bending changes in the rotating direction and theaxial direction, so that the fan supplies air more uniformly. The energy efficiency of the wind wheel can be effectively improved, consumption can be reduced, and the purpose of environmental protection is achieved.

Description

technical field [0001] The invention relates to the field of fan equipment, in particular to a bidirectionally curved fan blade and a fan including the blade. Background technique [0002] At present, the fan is an indispensable part of the refrigeration or ventilation industry. During the working process of the fan, the airflow will flow along the suction surface and the pressure surface of the fan blade, and the air will flow out from the trailing edge of the blade, resulting in air separation and airflow. The flow velocity is higher along the suction side of the fan blade than on the pressure side. Because there is an airflow boundary layer on the suction surface of the fan blade, and as the fan rotates, the airflow boundary layer continuously falls off from the trailing edge of the fan blade, generating a large number of airflow vortices, so the overall shape of the fan blade has a great influence on the effect of the wind . Most of the fan blades in the prior art are ...

AI Technical Summary

Problems solved by technology

This patent only optimizes the thickness distribution of the fan blades, but does not improve the airflow distribution on the blades. It can only solve the problem of air volume, but cannot solve the problem of uneven air output due to the shape of the arc blades.

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