The refrigeration unit editor discusses air filters, also known as air cartridges, air filter elements, etc. They are mainly used for air filtration in engineering vehicles, automobiles, agricultural vehicles, laboratory operating rooms, and various precision operating rooms.

During engine operation, a large amount of air is drawn in. If this air is not filtered, suspended dust in the air will be sucked into the cylinders, accelerating the wear of the piston assembly and cylinders. Larger particles entering between the piston and cylinder can cause severe "cylinder scoring," which is particularly serious in dry and sandy working environments. Air filters are installed in front of the carburetor or intake manifold to filter out dust and sand particles from the air, ensuring that sufficient clean air enters the cylinders.

Various air filters have their own advantages and disadvantages, but inevitably, there is a trade-off between air intake volume and filtration efficiency. With in-depth research on air filters, the requirements for air filters are becoming increasingly stringent. New types of air filter elements have emerged, such as fiber filter elements, composite filter material air filter elements, silencer air filter elements, and constant temperature air filter elements, to meet the needs of engine operation.