Three-layer fan blade and air circulation fan

Abstract

The invention provides a three-layer fan blade and an air circulation fan. The three-layer fan blade comprises a blade shaft, an inner ring frame arranged on the periphery of the blade shaft and coaxial with the blade shaft, an outer ring frame arranged on the periphery of the inner ring frame and coaxial with the inner ring frame, a first-layer blade set arranged between the blade shaft and the inner ring frame, a second-layer blade set arranged between the inner ring frame and the outer ring frame and a third-layer blade set arranged on the periphery of the outer ring frame. The air outlet end part of the inner ring frame is higher than the air outlet end part of the outer ring frame. The blade shaft is assembled in the air circulation fan, and a slow air channel is formed by a channel between the blade shaft and the inner ring frame. A channel between the inner ring frame and the inner wall of a fan shell forms a fast air channel. Slow air blown out of the slow air channel can be focused and blown forwards more directionally, so that the interference loss of fast air blown out of the fast air channel to the slow air is reduced, and the air type is complete. The forward directivity of the air flow direction is effectively ensured, the concentration and uniformity of the air flow can still be kept at the position of 1 m blowing, and the air blown out of the circulation fan can penetrate farther.

Description

technical field [0001] The present invention relates to the field of fans, in particular to the field of air circulation fans, and more specifically, to a three-layer fan blade and an air circulation fan with the three-layer fan blade. Background technique [0002] The traditional fan has only one layer of blades. When the motor starts to drive the blades to rotate to generate negative pressure, the air outside the fan is sucked in, and the air is sent out after passing through the blades. The air resistance caused by the blades of this structure is large. After the wind is sent out, it spreads directly, so the blowing distance cannot be very far, and the wind is also not soft due to the collision of the fast wind and the slow wind. Therefore, many consumers began to purchase air circulation fans in order to meet the needs of long blowing distance and soft blowing. [0003] At present, the air circulation fan products in the market still use single-layer fan blades. The man...

AI Technical Summary

Problems solved by technology

However, the basic shortcomings of the single-layer fan blades are only reinforced by the air duct. Although the blowing distance has been slightly improved, the collision between the fast wind and the slow wind mentioned above leads to excessive noise, and the wind blows out. Insufficient directivity results in turbulent flow, what's more, the wind squeezes each other in the air duct, causing the body to vibrate, and the consumer experience is poor

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