摘要：The negative ions in the air can effectively re- duce the indoor concentration of PM2.5. and the air temperature, humidity and negative-ion concentra-tion can affect the PM2.5 removal capacity of the negative ions. To study the effects of temperature, humidity and negative-ion concentration on air puri-fication by negative ions, a cabin was used to simu- late an office building. Anion generators and artifi- cial pollution sources were added to the cabin envi- ronment to simulate the air purification and particu- late matter treatment. The temperature, humidity and negative-ion concentration inside the enthalpy-dif- ference laboratory were varied to measure the con- centrations of PM2.5 and negative ions with relatedinstruments. The results indicate that under stable negative-ion concentration at the inlet of the cabin environment, the negative-ion concentration inside the cabin increased with the humidity at a tempera- ture of 25%C and increased with the temperature at 55% humidity. The PM2.5 removal capacity of the negative ions increased with the increase in the rela- tive humidity but decreased with the increase in tem- perature without anion generators, and the effect of temperature on the PM2.5 removal capacity was more significant. Through fitting analysis, the PM2.5 removal capacity was found to be highestwhen the relative humidity was between 56% and 60%, and the PM2.5 removal capacity was highest when the temperature was between 28C and 30℃ This indicates that the negative-ion concentration had the greatest influence on the PM2.5 removal ca- pacity, followed by temperature and then humidity. The experimental and test results were compared; the error rate was only 13.19%, verifying the PM2.5 removal capacity of the negative ions.
