How Does an Air Filter Work?

[Christina]

Here is how an air filter works: 1. Dry inertial air filter: The dry inertial air filter consists of a dust cover, guide vanes, dust discharge port, dust collection cup, etc. Its working principle is to use the suction force generated by the cylinder during intake to create a pressure difference inside and outside the air filter. External air enters the air filter at a high speed under pressure, throwing larger dust particles mixed in the air into the dust collection cup, thus completing the air filtration. 2. Wet inertial air filter: Also known as an oil bath filter, the wet inertial air filter mainly consists of a central tube and an oil pool. Its working principle is that air enters the filter and moves downward at high speed along the central tube, hitting the oil surface of the oil pool before abruptly changing direction to move upward, creating a rotational motion. At this point, some larger dust particles cannot reverse direction with the air due to inertia and are instead trapped in the oil, completing the air filtration. 3. Dry filtration air filter: The dry filtration air filter mainly 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, where dust in the air is either blocked by the filter element or adheres to it. 4. Wet filtration air filter: The wet filtration filter mainly consists of metal mesh soaked in engine oil. Its working principle is that after passing through the oil bath filter, air is further filtered through the oil-soaked metal mesh, where fine dust particles are trapped, and some adhered dust particles drip down with the oil.