Bionic micropore noise reduction structure for smoke exhaust system

Abstract

The invention discloses a bionic microporous noise-reducing structure which is used for an oil fume extraction system. The structure comprises a shell body; oil fume passes by the inner cavity of the shell body and contacts with the inner wall of the shell body; the invention is characterized in that the outer side of the shell body is fixedly provided with a noise-reducing box which is enclosed at the periphery; the noise-reducing box is internally provided with at least one layer of porous plate which is distributed with tight millipores, so the noise-reducing box is divided into at least an inner cavity and an outer cavity; the shell body which is opposite to the porous plate and enclosed in the noise-reducing box is coated and distributed with an oil-preventing coat, moreover, bar-shaped pores are tightly distributed on the shell body; the inner cavity of the shell body is communicated with the inner cavity of the noise-reducing box by the bar-shaped pores, moreover, the bar-shaped pores are slits of louver window type and the vanes of the slits are self-locked. The invention uses a principle of fluid mechanics for effectively preventing the oil fume from blocking the millipores at places such as cochlear duct, air exhaust pipe and the like, finally ensures that the noise-reducing box can effectively achieves the aims of long-term sound absorption and noise reduction, and is especially suitable for household oil fume extraction machine.

Description

technical field [0001] The invention relates to a range fume system, in particular to a bionic microporous noise reduction structure used in the range fume system. Background technique [0002] Places such as home kitchens and restaurant kitchens will inevitably produce a lot of fume. In order to keep the kitchen clean and human health, the fume extraction system has become an indispensable equipment in these places. In order to meet people's living needs, multiple range fume systems have already appeared on the market. Generally, the range fume extraction system includes a range hood and a pipe for exporting the range fume to the outside or transporting the range fume to the exhaust gas treatment system. For extracting (suction) range hoods, wherein the range hoods with centrifugal fans are popular because of their relatively large suction and low noise. But even so, due to the existence of the noise of the centrifugal fan itself, as well as the noise caused by the turbul...

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Problems solved by technology

[0003] During the actual use of the above microporous plate structure, it was found that due to the oily fume entrained in the airflow in the range hood, it is extremely unclean. After a long time of use, the micropores will be blocked by the accumulated oily fume, making the airflow unable to flow. Friction back and forth in the micropores consumes sound energy, thus failing to achieve the purpose of noise reduction and noise reduction

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