Title:
NOISE ELIMINATION METHOD AND MUFFLER
Document Type and Number:
WIPO Patent Application WO/2010/097014
Kind Code:
A1
Abstract:
A noise elimination method based on sound ray refraction theory and the muffler thereby are disclosed. The method uses low temperature refrigeration system (2) to form a temperature gradient inside and outside the chamber of the muffler, and the temperature inside the pipe wall of the chamber is higher than the outside. The temperature gradient may force sound ray to refract towards the low temperature direction, so the noise of the system may be captured and reduced. The muffler comprises a housing (1) whose inner wall is laid with a sound absorbing structure (4), and on the outer wall of the housing (1) is provided a low temperature refrigerating system (2). The system covers at least 5% of the area of the outer wall of muffler housing and combines with a temperature control system (3) to realize quantitative control of the temperature gradient. The muffler improves the noise-absorbing effect of the existing muffler effectively.
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Inventors:
LV YADONG (CN)
LIU DONG (CN)
WANG QIANG (CN)
LIU DONG (CN)
WANG QIANG (CN)
Application Number:
PCT/CN2010/000242
Publication Date:
September 02, 2010
Filing Date:
February 26, 2010
Export Citation:
Assignee:
CHINESE ACAD INST ACOUSTICS (CN)
LV YADONG (CN)
LIU DONG (CN)
WANG QIANG (CN)
LV YADONG (CN)
LIU DONG (CN)
WANG QIANG (CN)
International Classes:
F01N1/24
Foreign References:
| US5992560A | 1999-11-30 | |||
| CN101313130A | 2008-11-26 | |||
| CN2195622Y | 1995-04-26 | |||
| JP2006104975A | 2006-04-20 | |||
| JP2000161042A | 2000-06-13 | |||
| JPH0419320A | 1992-01-23 | |||
| CN00100641A | 2000-01-25 |
Other References:
See also references of EP 2402568A4
HELIN ZHU, ZHENGSHI LIU: "Perforated pipe muffler Numerical Analysis", JOURNAL OF NOISE AND VIBRATION CONTROL, June 2008 (2008-06-01)
XIAOJUN WANG, ZHIYUAN LI, HAOZHENG WEI: "Engine Muffler Static Performance Testing and Analysis", JOURNAL OF NOISE AND VIBRATION CONTROL, vol. 4TH, 2007
HELIN ZHU, ZHENGSHI LIU: "Perforated pipe muffler Numerical Analysis", JOURNAL OF NOISE AND VIBRATION CONTROL, June 2008 (2008-06-01)
XIAOJUN WANG, ZHIYUAN LI, HAOZHENG WEI: "Engine Muffler Static Performance Testing and Analysis", JOURNAL OF NOISE AND VIBRATION CONTROL, vol. 4TH, 2007
Attorney, Agent or Firm:
FAST INTELLECTUAL PROPERTY LAW, LLC (XiaorongRoom 1801, Tri-Tower C Building,No. 66 Zhongguancun East Roa, Haidian District Beijing 0, CN)
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