Wing structure of cross-flow fan

Abstract

The invention discloses a wing structure of a cross-flow fan. A pressure surface of a wing consists of two sections of arcs: an inner edge section and an outer edge section; a turning point is formedbetween the inner edge section and the outer edge section, and is formed at the peripheral end of a wing chord from a wing chord length by 27%; and the arc radius ratio value of the outer edge sectionand the inner edge section is 1: 1.35+-0.1. Through improvement of the structure, air currents firstly pass through 73% of the inner edge section during working; the pressing radius of the section islarger, the acting capacity is lower, and the buffering and rectifying effects are mainly achieved; the inner edge section is also called as a buffer section; then, the air currents pass through 27%of the outer edge section; the pressing radius of the section is lower, the acting capacity is higher, and main acting tasks are finished; the section is also call as an acting section; as an evaporator of an indoor unit of a conventional air conditioner adopts two rows of pipes, the overall resistance is lower; and as the cross-flow fan needs lower acting capacity, the buffer section of cross-flow blades can be enlarged as far as possible, the noise quality of the cross-flow fan is improved, and the practicability is high.

Description

technical field [0001] The invention relates to a vane structure of a cross-flow fan. Background technique [0002] Chinese patent literature number is CN2402847Y, discloses a kind of cross-flow fan of air conditioner on October 25, 2000, and it comprises blade and flange plate, and a plurality of blades are arranged to form cylindrical shape along the circumference of flange plate, and the shaft of blade and this cylinder The blades form a certain included angle, and the blades are not equidistantly distributed along the circumference of the flange. It is said that the structure has an even number of flanges to cut the blades into an odd number of small fans in the axial direction. It is parallel to the axial direction of the fan, which can realize the effect of concentrated wind force, lengthened wind distance and increased air volume. However, the fan blades of this structure are made of a single-section circular arc, and when the fan blade is working, it is a single-se...

AI Technical Summary

Problems solved by technology

However, the fan blades of this structure are made of a single-section circular arc, and when the fan blade is working, it is a single-section circular arc under pressure, and there is no buffer section when the airflow enters the blade grid, resulting in a large air intake impact and easy turbulence, resulting in air-conditioning indoor air conditioning. The noise of the machine is large, the rotation noise is prominent, and the comfort is poor, which cannot meet the needs of users

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