Model updating of air purification half time under complex electric fields

The air is purified under high voltage and high frequency complex electric fields. The results show that the half time T
_H
will drop while the initial concentration N
₀
of the aerosol particles reduces indoor, under the joint action of high voltage and high frequency complex electric fields and the filter. The half time T
_H
is reduced when they work together. But there is a obviously delay between the test value and the theoretical value of the half time. The error of experimental results is analyzed. Use exchange efficiency to modify the half time. The error is reduced by more than ten percent by comparison of unmodified model. The modification of the model is reasonable.