Exhaust muffler of hydrogen fuel cell system

Abstract

The invention discloses an exhaust muffler of a hydrogen fuel cell system. The exhaust muffler comprises an outer layer cylinder body, an air inlet end cover and an air outlet end cover, wherein the air inlet end cover and the air outlet end cover are arranged at the two ends of the outer layer cylinder body, and an air inlet and an air outlet are formed in the air inlet end cover and the air outlet end cover respectively; five cavity dividing plates are arranged inside the outer layer cylinder body, specifically, the first-type cavity dividing plate, the second-type cavity dividing plate, thefirst-type cavity dividing plate and the two third-type cavity dividing plate which are sequentially arranged; an arc-shaped inner layer mesh plate is arranged above the cavity dividing plates insidethe muffler, and the inner layer mesh plate is spaced from the inner wall of the muffler by a certain degree and penetrates through the whole muffler; and the inner layer mesh plate is fully providedwith small holes in a punched mode, and silencing cotton fills the cavity between the inner layer mesh plate and a muffler cylinder body. According to the exhaust muffler of the hydrogen fuel cell system, the high-frequency noise elimination capability with a wide frequency band is achieved, the problem that the noise generated during tail gas emission is too large can be solved, the moisture inthe tail gas can be removed, the low exhaust back pressure can be kept, and the overlarge power loss of the hydrogen fuel cell system is avoided.

Description

technical field

[0001] The invention belongs to the technical field of hydrogen fuel cell engines, in particular to an exhaust muffler for a hydrogen fuel cell system. Background technique

[0002] When the hydrogen fuel cell engine is working, because the air compressor compresses the airflow, the exhaust sound is high, and the noise is mainly high frequency. When the air compressor is running at full power, the noise of the tail row can usually reach more than 92dB(A), and some vehicles can even reach more than 100dB(A), which is unbearable, and the airflow passes through the hydrogen fuel cell reactor, and the exhaust gas contains a large amount of of water.

[0003] The current hydrogen fuel cell system tail muffler research technology is still in its infancy, and the noise reduction effect is generally poor, which seriously affects the vehicle ride comfort and pedestrians' subjective feeling of the vehicle, which in turn affects the popularization of hydrogen fuel cell...

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