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Fan, heat dissipation module and computer adopting fan and method for reducing noise of fan

A heat dissipation fin group and noise reduction technology, which is applied to components, calculations, and mechanical equipment of pumping devices for elastic fluids, can solve problems such as complex processing technology, inability to solve noise, and complex structure of fan noise, and achieve Simplify the noise reduction structure, reduce noise, and improve the effect of noise reduction

Active Publication Date: 2015-04-29
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the noise generated by the airflow on the surface of the fan blade can be reduced to a certain extent, it still has the following problems: 1. The processing technology is complicated. 2. From the perspective of the flow form of the airflow on the surface of the fan blade, the airflow will Diffusion in multiple directions, so there will be a part of the loss, making it difficult to obtain the ideal noise reduction effect; 3. A large part of the noise generated by the fan comes from the shedding of the wake vortex at the fan outlet, and this design has no way to deal with the wake vortex completely eliminate
[0006] In the research process, the inventor found that the fan of the computer has at least the following disadvantages: 1. The structure for eliminating the noise of the fan is complicated; does not do a good job of canceling out the noise caused by this eddy current
3. It cannot solve the noise caused by the shedding of the wake vortex at the fan outlet

Method used

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  • Fan, heat dissipation module and computer adopting fan and method for reducing noise of fan
  • Fan, heat dissipation module and computer adopting fan and method for reducing noise of fan
  • Fan, heat dissipation module and computer adopting fan and method for reducing noise of fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 , 2 , 3, the embodiment of the present invention includes: a motor 1 for driving the rotor 2 to rotate, and a plurality of fan blades 3 are radially extended on the rotor 2, and a certain air flow is formed on the fan blades 3 when the fan blades 3 rotate In direction 4, a first noise reduction structure 7 is formed on the edge of the air outlet 5 on the first surface 31 , and a second noise reduction structure 8 is formed on the edge of the air outlet 5 on the second surface 32 . The airflow flowing through the first surface 31 of the fan blade 3 is guided out through the first noise reduction structure to form a first airflow group (ie, vortex), and the airflow flowing through the second surface 32 of the fan blade 3 is passed through the second noise reduction structure 8 The airflow is exported to form a second airflow group (ie, vortex), and the first airflow group (ie, vortex) and the second airflow group (ie, vortex) collide with each other to c...

Embodiment 2

[0037] In this example, if Figure 4 As shown, the first noise reduction structure 7 is a first flow guide groove 72 with a groove structure, and the first flow guide groove 72 has a first flow guide wall 721 and a second flow guide wall 722 formed in depressions on the first surface 31 The second noise reduction structure 8 is a second flow guide groove 82 with a groove structure, and the second flow guide groove 82 has a third flow guide wall 821 and a fourth flow guide wall 822 formed in depressions on the second surface 32 . The first guide groove 72 and the second guide groove 82 are also formed at the edge of the air outlet 5 of the fan blade 3 , and extend toward the air inlet 6 of the fan blade 3 along the airflow direction 4 . The fourth flow guide wall 822 is located between the first flow guide wall 721 and the second flow guide wall 722 and the third flow guide wall 821 is located outside the first flow guide wall 721 . When a plurality of first flow guide grooves...

Embodiment 3

[0040] In this example, if Figure 5 As shown, the first noise reduction structure 7 is a first flow guide groove 73 with a convex groove structure, and the first flow guide groove 73 has a first flow guide wall 731 and a second flow guide wall formed protrudingly on the first surface 31 732 ; the second noise reduction structure 8 is a second flow guide groove 83 with a groove structure, and the second flow guide groove 83 has a third flow guide wall 831 and a fourth flow guide wall 832 formed in depressions on the second surface 32 . The first guide groove 73 and the second guide groove 83 are also formed at the edge of the air outlet 5 of the fan blade 3 , and extend toward the air inlet 6 of the fan blade 3 along the airflow direction 4 . The fourth flow guide wall 832 is located between the first flow guide wall 731 and the second flow guide wall 732 and the third flow guide wall 831 is located outside the first flow guide wall 731 . When a plurality of first flow guide ...

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PUM

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Abstract

The invention discloses a fan, which comprises a rotor of a fan blade, a motor, a first noise reduction structure and a second noise reduction structure. The airflow flowing through the first surface of the flan blade is led out through the first noise reduction structure to form a first airflow roll; the airflow flowing through the second surface of the flan blade is led out through the second noise reduction structure to form a second airflow roll; and the first airflow roll and the second airflow roll collide with each other to counteract respective energy. The invention also discloses a heat dissipation module, which comprises a heat dissipation fin group, wherein the fan is fixedly arranged on the heat dissipation fin group and the fan has the above structure. The invention also discloses a computer, which comprises a plurality of units with heat, wherein the fan arranged on the units has the above structure. The invention also discloses a method for reducing noise of the fan. The airflows formed on the two surfaces of the fan blade are guided to the air inlet of the fan blade to form the airflow rolls, and the airflow rolls collide with each other to counteract respective energy so as to achieve the effect reducing the noise.

Description

technical field [0001] The invention relates to a fan, in particular to a fan used for heat dissipation inside a computer, and a cooling module and a computer using the fan; the invention also relates to a method for reducing fan noise. Background technique [0002] The noise of the cooling fan of the computer is the main source of the noise of the whole machine. In order to reduce the noise generated by the cooling fan as much as possible, the manufacturer has made a series of improvements. [0003] In the prior art, a sound absorbing device is provided on the fan, and the noise of the fan is reduced by the sound absorbing device. The additional sound absorbing device not only greatly increases the manufacturing cost, but also increases the volume of the fan due to the complicated sound absorbing structure, which is inconvenient to be used as a computer cooling unit. [0004] In addition, in the prior art, some springs are added to the fan to reduce the noise generated whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/66G06F1/20
Inventor 张健辛志峰田婷孙峪那志刚朱青贺跃理王丽维
Owner LENOVO (BEIJING) LTD