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A silent fan

A fan and quiet technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as loud noise, poor sound insulation effect, and inability to apply quietness requirements, so as to improve sound absorption efficiency and noise reduction performance Effect

Active Publication Date: 2018-09-25
冯洁莹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the operation of a general centrifugal fan, a high-speed impeller is installed at the air inlet of the main body of the fan, and the air is pumped through the impeller. However, due to the intense friction between the impeller and the air, it will generate a lot of noise, resulting in most of the fans on the market. It will produce a lot of noise when working, so it cannot be used in environments that require high quietness
In order to achieve the mute effect, the current industry generally installs structures such as sound insulation cotton directly on the existing fan casing, but the sound insulation effect is not good

Method used

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Embodiment Construction

[0022] Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

[0023] Such as Figure 1-5 A silent fan shown includes a fan main body 100, an air inlet 61 is provided on one side of the fan main body 100, the fan main body 100 is hollow, and an air chamber is formed inside the fan main body 100, and the air chamber communicates with the air inlet 61 The hollow part of the fan main body 100 is surrounded by the outside of the air chamber; the impeller 200 for drafting can be installed in the air chamber, so that the whole fan can work normally, and the noise generated by the impeller 200 running in the air chamber will be generated by the air chamber. The two cavities of the air chamber and the hollow part of the first casing 60 are transmitted out again, which can block the propagation of noise layer by layer, greatly hindering the outward propagation of noise physically, and making the casing quiet. The effect is...

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Abstract

The invention discloses a mute fan. The mute fan comprises a fan main body, wherein an air inlet is formed in one side of the fan main body; the fan main body is hollow; an air chamber is formed in the fan main body; the hollow part of the fan main body surrounds the outside of the air chamber; the air inlet is provided with a sound absorbing piece and a top cover; the top cover is arranged at one end, which is away from the fan main body, of the air inlet; a projection part is formed in the middle of the side, which is close to the fan main body, of the top cover; a conical surface is formed on the periphery of the projection part; a first extension part is formed at the edge, which is positioned on the outer side of the air inlet, of the top cover; one end, which is close to the fan main body, of the sound absorbing piece surrounds the inner side of the air inlet; the other end, which is away from the fan main body, of the sound absorbing piece surrounds the inner side of the top cover; the diameter of the conical surface is gradually increased from one end which is close to the fan main body to the other end which is away from the fan main body; and the first extension part is gradually inclined to the direction close to the sound absorbing piece from one end which is close to the fan main body to the other end which is away from the fan main body. The mute fan is good in noise reduction property.

Description

technical field [0001] The invention relates to the technical field of fans, in particular to a silent fan. Background technique [0002] During the operation of a general centrifugal fan, a high-speed impeller is installed at the air inlet of the main body of the fan, and the air is pumped through the impeller. However, due to the intense friction between the impeller and the air, it will generate a lot of noise, resulting in most of the fans on the market. It will produce a lot of noise during work, and cannot be used in environments that require high quietness. In order to realize the mute effect, structures such as sound-proof cotton are generally arranged directly on the existing fan casing in the current industry, but the sound-proof effect is not good. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a silent fan, which can improve the quiet performance of the fan. [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/66F04D29/42
CPCF04D29/4213F04D29/4226F04D29/663F04D29/664
Inventor 冯洁莹
Owner 冯洁莹
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