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Axial flow fan blade, axial flow fan and electric fan

A technology of axial-flow blades and blades, which is applied in the field of axial-flow blades, axial-flow fans and electric fans, can solve the problems of increased motor cost, increased noise, and increased quality of axial-flow blades, and achieves improved fan performance. Effects of performance, noise increase, and noise reduction

Pending Publication Date: 2022-02-18
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Axial flow fans are widely used in home appliances because of their large air volume and low noise. However, the axial flow fan blades are prone to deformation at high speeds, resulting in smaller compression of the axial thickness of the axial flow fan blades and a decrease in air volume, which affects the axial flow. Fan performance
[0003] In order to prevent axial flow blades from deforming at high speeds, on the one hand, the thickness of the axial flow blades can be increased to increase the strength of the axial flow blades, but the cost of materials is high, and the increase in the mass of the axial flow blades will increase the power. The cost of the motor will also increase; on the other hand, it is also possible to add ribs to the root of the blade of the axial flow fan to enhance the strength of the blade root, improve the stress distribution near the blade root, and prevent the root of the axial flow fan from cracking at high speeds. However, it cannot eliminate the deformation of the axial flow blade at high speed. Similarly, the ribs will increase the mass of the axial flow fan blade and increase the material cost. In addition, the vicinity of the ribs is prone to turbulence, which increases the noise

Method used

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  • Axial flow fan blade, axial flow fan and electric fan
  • Axial flow fan blade, axial flow fan and electric fan
  • Axial flow fan blade, axial flow fan and electric fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as Figure 1 to Figure 3 As shown, this embodiment provides an axial flow blade 2, the blade of the axial flow blade 2 includes a blade root 23, a blade tip 24, a leading edge 21 and a trailing edge 22, wherein the blade root 23 is connected to the hub 1 , the blade tip 24 is set away from the hub 1, the leading edge 21 is located at the front end of the axial flow blade 2 in the direction of rotation, the trailing edge 22 is located at the rear end of the axial flow blade 2 in the direction of rotation, the surface of the blade facing the airflow is the suction surface 25, and the back of the blade is The surface facing the airflow is the pressure surface 26, the leading edge 21 and the trailing edge 22 of the axial flow blade 2 are bent along the direction of rotation of the axial flow blade 2, the pressure surface 26 of the axial flow blade 2 is formed with a sinking groove 27, and the suction surface 25 is formed with protrusions 28 and the side walls of the si...

Embodiment 2

[0066] In this embodiment, the surface of the sinker 27 is smooth, which is beneficial to increase the air volume of the axial flow fan 2 , improve the performance of the fan, and is also conducive to the demolding of the axial flow fan 2 during the manufacturing process.

[0067] The depth of the sinker 27 gradually decreases from deep to shallow along the blade root 23 to the blade tip 24, and the depth of the sinker 27 gradually changes from shallow to deep along the leading edge 21 to the trailing edge 22. It is verified by experiments and simulations that this structure is conducive to increasing the The air volume of the axial fan blade 2 improves the performance of the fan.

[0068] In this embodiment, the maximum depth of the sinker groove 27 is 2.0 to 2.2 mm.

[0069] If the depth of the sinking groove 27 is too small, the strength of the axial flow fan 2 cannot be effectively improved; if the depth of the sinking groove 27 is too large, the strength of the axial flow...

Embodiment 3

[0074] This embodiment also provides an axial flow fan, which includes the above-mentioned axial flow fan 2 .

[0075]Utilize this axial-flow fan, by setting sinking groove 27 on the pressure surface 26 of its axial-flow fan blade 2, suction surface 25 is provided with protrusion 28, thereby improve the intensity of axial-flow fan blade 2, without enlarging axial-flow fan blade 2 quality, it can effectively improve the deformation of the axial flow fan 2 at high speed, increase the air volume of the axial flow fan 2, and improve the performance of the axial flow fan. In addition, because the axial flow fan 2 does not use reinforcing ribs, there are It is beneficial to avoid the generation of turbulent flow and to avoid increasing the amount of noise.

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Abstract

The invention provides an axial flow fan blade, an axial flow fan and an electric fan. A blade of the axial flow fan blade comprises a blade root, a blade top, a front edge and a tail edge, the front edge and the tail edge of the axial flow fan blade are bent in the rotating direction of the axial flow fan blade, a sinking groove is formed in the pressure surface of the axial flow fan blade, a protrusion is formed on the suction surface of the axial flow fan blade, and the side wall of the sinking groove is arranged along the edge of the blade. By utilizing the axial flow blade, the sinking groove is formed on the pressure surface of the axial flow blade, and the protrusion is formed on the suction surface of the axial flow blade so that the strength of the axial flow blade is improved, the deformation of the axial flow blade at a high rotating speed is effectively improved on the premise of not increasing the quality of the axial flow blade, the air volume of the axial flow blade can be increased, and the performance of the axial flow fan is improved; in addition, reinforcing ribs are not used, the generation of turbulent flow is favorably avoided, and the noise is favorably prevented from being increased.

Description

technical field [0001] The invention relates to the technical field of axial flow fans, in particular to an axial flow fan blade, an axial flow fan and an electric fan. Background technique [0002] Axial flow fans are widely used in home appliances because of their large air volume and low noise. However, the axial flow fan blades are prone to deformation at high speeds, resulting in smaller compression of the axial thickness of the axial flow fan blades and a decrease in air volume, which affects the axial flow. Fan performance. [0003] In order to prevent axial flow blades from deforming at high speeds, on the one hand, the thickness of the axial flow blades can be increased to increase the strength of the axial flow blades, but the cost of materials is high, and the increase in the mass of the axial flow blades will increase the power. The cost of the motor will also increase; on the other hand, it is also possible to add ribs to the root of the blade of the axial flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/38F04D29/34F04D29/66F04D25/08
CPCF04D29/388F04D29/34F04D29/663F04D25/08
Inventor 田伶柳洲梁浩饶长健张驰
Owner GREE ELECTRIC APPLIANCES INC