Noise reduction type air filter

• Main Authors: HUANG TAO, PENG SHAOLING, ZHOU SHUZHONG, NIE JINWEN
• Format: Patent
• Language: Chinese; English
• Published: 01.02.2022
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

The utility model discloses a noise reduction type air filter which comprises a shell, an air inlet pipe and an air outlet pipe, a filter element is installed inside the shell, the air inlet pipe and the air outlet pipe are installed on an air inlet and an air outlet of the shell, a resonator is arranged on the side wall of the air outlet pipe, and resonance frequency in the resonator has strong sound absorption capacity. The resonance frequency of the resonator is matched with the vibration frequency generated when high-frequency airflow flows in the air outlet pipe, the response peak value of airflow vibration can be reduced, and noise generated when air flows through the air outlet pipe is reduced. Meanwhile, the air outlet pipe is inserted into the air outlet, and the end, located in the air outlet, of the air outlet pipe is the air inlet end of the air outlet pipe and provided with an air inlet lip. The air inlet lip comprises an inner lip body and an outer lip body, the inner side of the inner lip body