Axial fan blade and air conditioner with same

Abstract

The invention discloses an axial-flow fan. The axial-flow fan comprises a hub and a blade which is connected with the hub. The blade comprises a slant section and a bending section which is connected with the slant section along the section of an equal proportion section cutting plane, wherein the equal proportion section cutting plane is a plane, where a same equal proportion point connecting line of a plurality of sections of arcs with the center of the hub serving as a circle center locates, on the blade; the slant section slants from a connecting position of the slant section and the hub to a lee side of the blade, and a distance Ra from each point at the tail end to the center position of the hub is in a first setting range. The bending section bends from the tail end of the slant section to a windward side of the blade, and the radius of curvature delta of each point on the same circumference, with the hub center serving as a center, of the bending section is in a second setting range. According to the axial-flow fan, the energy efficiency of equipment can be improved, and noise produced when the fan runs is reduced. The invention further discloses an air conditioner with the axial-flow fan.

Description

technical field [0001] The invention relates to the technical field of fan equipment, in particular to an axial flow fan blade. The present invention also relates to an air conditioner with the above-mentioned axial flow fan. Background technique [0002] At the moment when energy is becoming increasingly tense, people have higher and higher requirements for energy efficiency of products, especially for air-conditioning equipment. As one of the important working parts of air-conditioning equipment, the performance of fan system has a great influence on the energy efficiency of air-conditioning equipment. [0003] The axial-flow fan blades in the existing fan system are generally in an approximate planar structure, and such blades have a large resistance loss during operation, which makes the efficiency of the fan lower, resulting in lower energy efficiency of the air-conditioning equipment. On the other hand, when the fan with the above-mentioned blades is working, the tur...

AI Technical Summary

Problems solved by technology

[0003] The axial flow fan blades in the existing fan system are usually in an approximate planar structure, which has a large resistance loss when working, which makes the efficiency of the fan lower and the energy efficiency of the air conditioning equipment is lower

On the other hand, when the fan with the above-mentioned blades is working, the turbulent airflow flows through the blade wall, and due to the effect of viscosity, a boundary layer with a wall airflow velocity of 0 is generated. Under a positive pressure gradient, the flow direction of the airflow will be changed, resulting in reverse flow, and then Boundary layer separation phenomenon, vortex shedding occurs; while there is a certain gap between the blade tip and the guide ring, leading edge blade tip vortex shedding occurs, and the continuous generation and disappearance of the vortex will consume energy and cause leakage loss; Noise is also relatively large

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