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Airfoil-shaped axial flow fan blade and air conditioner outdoor unit

A technology of axial-flow fan blades and airfoils, which is applied in air-conditioning systems, mechanical equipment, machines/engines, etc., and can solve the problems that the performance of airfoils varies greatly, and the performance of fan blades is not as good as that of airfoils.

Active Publication Date: 2021-12-28
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of airfoils, and the performance of different types of airfoils varies greatly. The existing axial flow blades mostly use simple arc airfoils. Although this airfoil is easy to process, its performance is not as good as that of airfoils.

Method used

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  • Airfoil-shaped axial flow fan blade and air conditioner outdoor unit
  • Airfoil-shaped axial flow fan blade and air conditioner outdoor unit
  • Airfoil-shaped axial flow fan blade and air conditioner outdoor unit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] In the existing designs of axial flow fan blades, in order to give priority to satisfying heat dissipation requirements, the air volume is the main factor to be considered. With the increase of market competition and the requirements of energy saving and emission reduction, in addition to the air volume, the evaluation of the performance of the fan blades pays more and more attention to the wind pressure, efficiency, energy efficiency level and noise. Under the premise of meeting the air volume level, how to design fan blades with high efficiency, low energy efficiency and low noise is an urgent problem to be solved at present. Most of the existing axial flow blades adopt simple arc airfoils. Although the airfoils are easy to process, the performance of the blades is not as good as that of airfoils.

[0099] In view of the above problems, the embodiment of the present application provides an airfoil axial-flow fan blade, which can generate a larger air volume than a cir...

Embodiment 2

[0113] When designing the axial flow blade, not only the aerodynamic performance of the axial flow blade needs to be considered, but also factors such as the installation position and structural strength need to be considered. Based on the blade, an airfoil axial flow fan blade suitable for the axial flow fan system of the external unit of the air conditioner is designed.

[0114] see Figure 1 to Figure 5 , the airfoil axial flow blade shown in the embodiment of the present application includes: three axial flow blades 12; on each axial flow blade 12, with the center of the hub 11 as the center, the diameter between D0 and D3 of the cylindrical section The area is the root of the blade, the area between the cylindrical sections with diameters D3 and D6 is the middle of the blade, and the area between the cylindrical sections with diameters D6 and D10 is the top of the blade; where, D0∈[170,175] mm; D3∈[290,295]mm; D6∈[412,417]mm; D10∈[572,577mm].

[0115] That is, take the ...

Embodiment 3

[0128] Regarding the airfoil axial flow fan blades suitable for the axial flow fan system in the external unit of the air conditioner shown in the second embodiment above, the embodiment of the present application further explains it, so that the blade root and the middle part of the blade based on the axial flow blade The structure of the axial-flow fan blade obtained by fitting various structural parameters on the top of the blade is more accurate, and its aerodynamic performance is better.

[0129] see Figure 6 , the embodiment of the present application further explains the structural parameters of the blade root in the second embodiment. In the part of the blade root, the first cross-section S1 and the second cross-section S2 are intercepted, and the first cross-section S1 and the The structural parameters of the second section S2 are described in detail:

[0130] The diameter D1∈[210,215]mm corresponding to the first section S1, the chord length c 1 ∈[210,212]mm, inst...

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Abstract

The invention relates to an airfoil-shaped axial flow fan blade and an air conditioner outdoor unit. The airfoil-shaped axial flow fan blade comprises a hub and a plurality of axial flow blade bodies, the axial flow blade bodies are circumferentially arranged on the hub at equal angles, each axial flow blade body is sequentially divided into a blade root part, a blade middle part and a blade top part from the center of the hub along the radial direction of the hub, on the axial flow blade bodies, the chord length of wing chords is sequentially increased, the installing angles are sequentially reduced, the maximum thickness is sequentially reduced in the direction from the blade root parts to the blade top parts, a section formed by any one of the blade root parts, the blade middle parts and the blade top parts and a cylindrical section, the curvature of a suction surface curve of the section is reduced and then increased in the direction from the front edge to the maximum thickness position and then to the tail edge and reaches the minimum value at the maximum thickness position, and the maximum curvature value of a pressure surface curve of the section is less than the maximum curvature value of the suction surface curve. The airfoil-shaped axial flow fan blade provided by the invention has excellent aerodynamic performance, and can generate larger air outlet volume under the same motor input power.

Description

technical field [0001] The present application relates to the technical field of axial-flow fan blades, in particular to an airfoil-shaped axial-flow fan blade and an air conditioner external unit. Background technique [0002] The external unit of the air conditioner usually uses an axial flow fan system to enhance convection heat exchange. The axial fan blade is the core component of the fan system, and its basic structure includes the hub and the blades surrounding it. Axial fan blades have simple structure, large flow rate and small size, and are widely used in household appliances. In the previous fan blade design, the priority was to meet the heat dissipation requirements, and the air volume was the main consideration. With the increase of market competition and the requirements of energy saving and emission reduction, in addition to the air volume, the evaluation of the performance of the fan blades pays more and more attention to the wind pressure, efficiency, ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/38F24F1/38
CPCF04D29/388F24F1/38Y02E10/72
Inventor 曾帅卢奇杨锦文陈成
Owner GREE ELECTRIC APPLIANCES INC
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