Noise reduction fan

Abstract

The invention discloses a noise reduction fan. The noise reduction fan is technically characterized by comprising a shell and a wind generation device arranged in the shell, wherein the shell comprises an inner shell and an outer shell; the inner shell is arranged in the outer shell in suspension; a hollow cavity is formed between the inner shell and the outer shell; a silencer is arranged in the hollow cavity. As the inner shell is arranged in the outer shell in suspension, vibration generated in the inner shell by the wind generation device and transmitted to the outer shell is reduced, vibration generated by the outer shell is reduced, thus vibration between the outer shell and the ground is reduced, noise produced on the ground by the vibration of the outer shell is reduced and good noise reduction effect is achieved; meanwhile the silencer is arranged in the hollow cavity and is used for generating an inverted sound wave to eliminate the noise generated by the inner shell and caused by the vibration of the inner shell which is produced by the vibration of the wind generation device.

Description

technical field [0001] The invention relates to the field of machinery, and more specifically, it relates to a sound-absorbing blower. Background technique [0002] Fan is a kind of general mechanical equipment with a wide range of applications. The production of electric power, mining, machinery, metallurgy, chemical industry and other industries cannot do without fans. The noise generated by the fan during operation often affects the health of workers and disturbs the environment, especially the fan near the living area. The aerodynamic noise radiated from the air inlet and outlet is the main factor that pollutes the environment. Public nuisance is one of the main objects of intellectual noise pollution in my country's industrial sector in recent years. [0003] In the prior art, the invention patent with the application number "201010522009.0" discloses a low-noise fan, which is provided with an inner shell and an outer shell, and a sound-absorbing material is arranged be...

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Problems solved by technology

[0003] In the prior art, the invention patent with the application number "201010522009.0" discloses a low-noise fan, which is provided with an inner shell and an outer shell, and a sound-absorbing material is arranged between the inner and outer shells, and the sound-absorbing material can absorb sound through the sound-absorbing material. It has the effect of reducing noise. This kind of sound-absorbing material has a certain significant effect, but in some special production industries, such as the production industry of earphone membranes, the slightest noise will cause the vibration of the biological earphone membranes, resulting in The molding of the earphone membrane fails, so an ultra-low noise noise reduction fan is required

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