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What is the working principle of an air filter?

1 Answers

LaMaria

07/29/25 4:19pm

Working principles of different types of air filters: 1. Dry inertial air filter: The dry inertial air filter consists of a dust cover, deflector, dust outlet, and dust collection cup. Its working principle utilizes the suction generated during cylinder intake to create a pressure difference inside and outside the air filter. External air enters the air filter at high speed under pressure, flinging larger dust particles mixed in the air into the dust collection cup, thereby completing air filtration. 2. Wet inertial air filter: Also known as an oil bath filter, the wet inertial air filter mainly comprises a central tube and an oil reservoir. Its working principle involves air entering the filter and rapidly descending along the central tube, hitting the oil surface in the reservoir, where the direction abruptly changes to upward, creating a rotational motion. Larger dust particles, due to inertia, cannot follow the upward air flow and adhere to the oil, completing air filtration. 3. Dry filtration air filter: The dry filtration air filter primarily consists of a paper filter element and sealing gaskets. Its working principle is that air passes through the paper filter element upon entering the filter, with dust in the air being separated or adhered to the filter element. 4. Wet filtration air filter: The wet filtration filter mainly consists of metal mesh soaked in engine oil. Its working principle is that after oil bath filtration, air passes through the oil-soaked metal mesh, where fine dust particles are trapped, and some adhered dust particles drip back into the oil with the engine oil, completing air filtration.

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