Muffler

Abstract

The invention provides a muffler, belonging to the field of muffling devices and solving the problem that a traditional muffling device is poor in muffling effect. The muffler disclosed by the invention comprises a cylindrical hollow cylinder body, wherein the cylinder body comprises a first end part, a second end part and a muffling part positioned between the first end part and the second end part; outer surfaces of the first end part and the second end part are smooth; the outer surface of the muffling part is partially inwards concaved to form a plurality of semicircular depressed parts; the depressed parts comprise diameter sides and arc sides; and the arc sides inwards extend to form circular arc parts. The continuously-transmitted high-speed air current is stopped by the circular arc parts, so that the speed of the air current is reduced; on the other hand, vacuum back suction is formed in a gap due to the pressure difference action in the gaps of the depressed parts, the high-speed air current is effectively discharged from the muffler cylinder body and is further absorbed by a muffling material, so that the muffler disclosed by the invention is favorable in muffling effect, is simple in structure and is convenient for large-scale production.

Description

technical field [0001] The invention relates to a noise reduction device, in particular to a noise reduction device with good noise reduction effect. Background technique [0002] The muffler is manufactured according to the principle of sound absorption, reflection and interference to reduce the noise radiated by the sound source. When the car starts and runs at high speed, the exhaust gas is discharged at high speed through the exhaust pipe. Since the exhaust pipe is generally made of a cylindrical pipe with a small diameter, the exhaust gas flowing at high speed produces a lot of noise during the exhaust process. [0003] In order to eliminate this kind of noise, the existing mufflers mostly form a muffler by opening a plurality of small holes on the outer wall of the hollow cylindrical tube, such as the Chinese patent disclosed by the notification number CN2392916Y, which is arranged uniformly at the bottom of the cylindrical cylinder Small holes, and absorbing cotton i...

AI Technical Summary

Problems solved by technology

However, the sound absorption effect of this kind of muffler is not good. The main reason is that when the air flow is transmitted laterally along the cylindrical shell, the circular holes provided on the cylindrical shell cannot make the air flow radially spread effectively so that The gas is absorbed by the wave-absorbing cotton through the circular hole to achieve the sound-absorbing effect

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