Noise reduction air duct of axial flow fan

Abstract

The invention discloses a noise reduction air duct of an axial flow fan, and relates to the technical field of axial flow fans, the noise reduction air duct comprises a main body device, the axial flow fan is arranged in the main body device, an external protective sleeve is arranged on the outer wall of the axial flow fan, and a bearing adjusting support is arranged below the external protective sleeve; an auxiliary rubber cushion layer is arranged in the axial flow fan, a porous fiber silencing layer is fixedly connected to the inner wall of the auxiliary rubber cushion layer, and a vacuum sound insulation layer is arranged on the inner wall of the porous fiber silencing layer. Noise is eliminated and absorbed through the porous fiber noise reduction layer, the vacuum sound insulation layer, the built-in sound absorption cotton layer and the noise reduction and sound absorption grid layer, and the problem that the working efficiency and rest quality of a user are seriously affected by noise generated in the using process of an existing axial flow fan is solved. And the transmitted noise vibration is captured through the interior of the noise reduction and sound absorption grid layer, so that the noise reduction and sound attenuation effects during operation of the axial flow fan are further ensured.

Description

technical field [0001] The invention relates to the technical field of axial flow fans, in particular to a noise reduction air duct of an axial flow fan. Background technique [0002] Axial flow fans are very widely used, that is, the airflow in the same direction as the axis of the fan blades, such as electric fans, air conditioner outdoor fans are axial flow fans. It is called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are usually used in applications with high flow requirements and low pressure requirements. Axial fans fix the position and move the air. The axial flow fan is mainly composed of the fan impeller and the casing. The structure is simple but the data requirements are very high. When the impeller rotates, the gas enters the impeller axially from the air inlet, and is pushed by the blades on the impeller to increase the energy of the gas, and then into the guide vane. The guide vanes turn the deflected airflow into an axial ...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a noise-reducing air cylinder of an axial flow fan, one of which is to provide a porous fiber sound-absorbing layer, a vacuum sound-insulating layer, a built-in sound-absorbing cotton layer, and a noise-reducing sound-absorbing grid layer, so as to solve the problem of existing axial flow fans. During use, loud noises are often generated, which will bring physical discomfort to users and seriously affect their work efficiency and quality of rest.

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