Abstract: Hepa filter screen is usually used for fresh air purification in fresh air conditioning. In order to achieve no consumable purification, using conductive film as a dust collector to verify its effect on fresh air purification. Through the theoretical analysis of the charging process and adsorption process in the purification process, a simple numerical calculation model is established, and the samples under the existing structural dimensions are tested and analyzed. Through the test results and numerical model calculation, it is found that when the fresh air speed reaches 8.2 m/s, the thickness of the electronic filter element needs to reach more than 71.5 mm to have a better purification effect. Under the existing structure of fresh air conditioning, electrostatic precipitator technology is difficult to replace Hepa filter screen.

Key words: Fresh air, Electrostatic precipitator, Charge, PM_2.5