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Large air-volume piece type impedance composite muffler

An impedance composite and muffler technology, applied in muffler devices, machines/engines, engine components, etc., can solve the problems of poor low and medium frequency muffler effect, low low frequency muffler effect, etc., to achieve reasonable structure, significant noise reduction effect, The effect of reducing environmental pollution

Inactive Publication Date: 2014-01-29
江苏华东正大空调设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The muffler has a remarkable noise reduction effect on medium and high frequencies, but not at low frequencies. In order to overcome the shortcomings of the large air volume chip muffler's poor noise reduction effect on low and intermediate frequencies, it is necessary to develop a chip impedance composite muffler.

Method used

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  • Large air-volume piece type impedance composite muffler
  • Large air-volume piece type impedance composite muffler

Examples

Experimental program
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Embodiment Construction

[0014] Below in conjunction with accompanying drawing, the present invention will be further described:

[0015] Referring to the accompanying drawings, a high-volume sheet-type impedance composite muffler includes a frame 1, a side sound-absorbing sheet 2, and a semicircular wind deflector 14. Sheet 2, several ventilation cavities 15 and sound-absorbing sheets 4 are arranged at intervals between the two side sound-absorbing sheets 2, and a sound-absorbing sheet rotating arm device 5 is arranged on the upper and lower parts of one ventilation cavity 15, and the sound-absorbing sheet rotating arm device A universal wheel 7 is arranged under the sound-absorbing sheet 4 on one side, and a positioning block 3 is riveted on the upper and lower ends of the remaining ventilation cavity 15 by rivets. The sound-absorbing sheet 4 is composed of two sound-absorbing cavities 11 and a resonant cavity 12 ; the resonant cavity 12 is arranged between the two sound-absorbing cavities 11 . ...

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PUM

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Abstract

A large air-volume piece type impedance composite muffler comprises a frame, side sound absorption pieces and semicircle air deflectors, the left and the right of the inside of the frame are provided with a side sound absorption piece respectively, a plurality of ventilation cavities and sound absorption pieces are arranged between the two side sound absorption pieces at intervals, the upper portion and the lower portion of the inside of the one of the ventilation cavities are provided with sound absorption piece rotating arm devices, universal wheels are arranged below the sound absorption piece of one side of the sound absorption piece rotating arm devices, and positioning blocks are riveted to the upper end and the lower end of the rest ventilation cavities through rivets. The large air-volume piece type impedance composite muffler is reasonable in structure, significant in noise-reduction effect and wide in sound absorption frequency band, and reduces environmental pollution. The large air-volume piece type impedance composite muffler is applicable to ventilation facilities of underground railways and highway tunnels.

Description

technical field [0001] The invention relates to the technical field of ventilation equipment, in particular to a large-volume sheet-type impedance composite muffler. Background technique [0002] Environmental noise has become an important public nuisance in recent years, and it is one of the important global environmental pollutions. The control of noise pollution has become an important content of environmental protection work at home and abroad. The scope of influence of living noise is expanding, and the problem of traffic noise is becoming more and more prominent. Controlling noise pollution is an environmental problem that needs to be solved urgently around the world, so the muffler has great potential. Underground railway transportation is a tool for urban modernization, but the area around the subway is generally surrounded by many urban residents and commercially developed areas, so noise control is very important. The main source of noise pollution in subwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/10
Inventor 季金良
Owner 江苏华东正大空调设备有限公司
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