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Silencer for lampblack fan

A muffler and fan technology, which is applied in the direction of machines/engines, mechanical equipment, liquid fuel engines, etc., can solve the problems of poor high temperature resistance and insignificant filter noise reduction effect, etc., to achieve increased insertion loss, significant noise reduction effect, The effect of the noise reduction effect is obvious

Inactive Publication Date: 2015-05-06
SHENZHEN KEDE ACOUSTIC TECH
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, the above structure is made of polyvinyl chloride board and acetic acid board, which has poor high temperature resistance, and the filtering and noise reduction effect is not obvious in practical applications.

Method used

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  • Silencer for lampblack fan
  • Silencer for lampblack fan
  • Silencer for lampblack fan

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Experimental program
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Effect test

Embodiment Construction

[0022] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0023] Such as figure 1 , figure 2 As shown, the range fume fan muffler realized by the present invention mainly includes three parts: noise reduction section A 1 (first noise reduction unit), noise reduction section B 3 (second noise reduction unit) and transition section 2 .

[0024] Wherein, the muffler section A 1 is designed as a rectangular muffler, which is composed of a shell 7 and muffler blades 5,6. The arrangement of the anechoic blades is that the two sides are the half anechoic blades 5, the middle is the full anechoic blades 6, and the half anechoic blades 5 and the full anechoic blades 6 are evenly distributed; the thickness of the half anechoic sheets is the thickness of the full anechoic sheets One half is fixed on the inner wall of the shell 7, and the full sound-absorbing blade 6 is fixed in the shell from the longitudinal directio...

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Abstract

The invention discloses a silencer for a lampblack fan. The silencer comprises a first silencing unit, a second silencing unit and a transition section, wherein silencing blades are arranged in the first silencing unit and the second silencing unit, the transition section is hollow and is provided with no silencing blade, and the silencing blades are divided into a front section and a rear section in the airflow direction. The silencing blades on the front section and the silencing blades on the rear section are arranged in a stagger mode, so that insertion loss of the whole silencer is effectively increased, silencing effect is remarkable, wide-band noise silencing effect is especially remarkable, and the silencer is suitable for equipment with high noise such as the lampblack fan.

Description

technical field [0001] The invention belongs to noise reduction equipment, in particular to an oil fume fan muffler for eliminating the noise of the oil fume fan. Background technique [0002] With the development of our country's urban process, the construction of urban complexes has become the main construction trend of modern cities. As an important functional part of urban complexes, the catering industry has become the top priority of current complex investment. With the presence of catering, the noise and fume of the kitchen fume fan seriously affect the living environment of the owners. [0003] The large-displacement range fume fan has high noise, and its frequency characteristic is low and medium frequency. Low and medium frequency noise attenuates slowly, and the impact of low frequency noise fans on the surrounding environment is greater than that of medium and high noise fans; the existing sound insulation and noise reduction equipment is a weak link for low fre...

Claims

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Application Information

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IPC IPC(8): F04D29/66
CPCF04D29/663F04D29/664
Inventor 王少云吴瑜媛高宏俊王锋锋
Owner SHENZHEN KEDE ACOUSTIC TECH
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