Influence of outdoor air rate on indoor air microbial contamination control

Tests the actual project of setting up outdoor air systems, investigates the control effect of outdoor air system on indoor air microorganism, and simulates the influence of outdoor air rate on indoor air microbial contamination. The test results show that, after the outdoor air system runs for 1.5 h to 2.0 h, the average concentration of bacteria and fungi in the indoor air decreases by 82.10% and 86.64%, respectively. The simulation results show that, with the increase of outdoor air rate, the aerosol pollution in the pollution source, the exhaust outlet and the wall of the room obviously decreases, and the average concentration of aerosol particles in people’s working areas decreases from 396 cfu/m3 to 109 cfu/m3, all at clean levels. Indicates that the outdoor air system has a better treatment effect on indoor aerosol particles.