Experimental study on indoor air cleaner based on different types of air filter units

Designs an indoor air cleaner with replaceable filter unit. Tests the filtration performances of intense field dielectric (IFD) device, high efficiency particulate air filter (HEPA)(1), primary effect filter combining with electret air filtration material, primary effect filter combining with electrostatic spinning air filtration material, and superposition of primary effect filter, HEPA(2) and activated charcoal filter in an office in Shanghai, including singlepass removal efficiency, air volume, energy consumption, PM2.5 removing effect and ozone generation. Calculates the clean air delivery rate (CADR) and filtration efficiency. The results show that each air filter unit can significantly remove the PM2.5 generated by cigarette smoke. HEPA(1) and primary effect filter combining with electret air filtration material have higher CADR and filtration efficiency, followed by primary effect filter combining with electrostatic spinning air filtration material and superposition of primary effect filter, HEPA(2) and activated charcoal filter. IFD device has the highest CADR but the lowest filtration efficiency.