An air filter is an air filtration device, generally used in clean workshops, clean plants, laboratories, and clean rooms, or for dust control of electronic and mechanical communication equipment. So what is the principle of air filters and what is the structure of air filters?
What is the principle of an air filter?
The working principle of the air filter is to use filter media as the main filtration means when the air passes through the filter air filter, the filter paper will block the impurities in the air and stick them on the filter element, to realize the effect of air filtration. Details about the principle of air filters are as follows:
1. Dry inertia-type air filter
A dry inertia-type air filter consists of a dust cover, deflector plate, dust discharge port, dust collection cup, and so on. Its working principle is to use the cylinder in the air intake, the suction generated, so that the air filter inside and outside the pressure difference, the external air under the action of the pressure at a higher speed into the air filter, mixed in the air quality of the larger dust thrown to the dust cup to complete the filtration of air.
2. Wet inertia-type air filter
Mainly by the center tube, oil pool, and other components. Its working principle is that the air into the filter along the center tube at a very high speed downward rushed to the oil pool oil surface after the direction of movement suddenly changed to upward, and produced rotary movement, at this time a part of the larger quality of the dust due to inertia can not be upward with the air in the opposite direction and is adhered to the oil, complete the filtration of the air.
3. Dry filter air filter
The paper filter element and sealing gaskets and other components, ' working principle is that the air into the filter through the paper filter element filtration so that the dust in the air by the filter element is isolated or adheres to the filter element.
4. Wet filter air filter
By the oil-soaked metal filter composition, its working principle is the oil bath filtered air through the oil-soaked metal filter when the fine dust particles are blocked, adhering to the part of the dust particles randomly oil together with the oil drips down to the oil.
What is the role of the air filter?
The engine in the working process sucks in a large amount of air, if the air is not filtered, the air-suspended dust is sucked into the cylinder, which will accelerate the piston group and cylinder wear. Larger particles in the piston and cylinder will cause a serious “cylinder pull” phenomenon, particularly in the dry sandy working environment.
An air filter installed in front of the carburetor or intake pipe filters out dust and sand in the air to ensure that the cylinder receives a sufficient amount of clean air.