Adsorption of Pollen by Switching Positive and Negative Voltages Applied to Wire Mesh for Screen Doors

Abstract

Since pollen intrusion through ventilation is a problem for hay fever sufferers, studies have been conducted on the adsorption of pollen by electrically charged wire mesh for screen doors. Previous studies have shown that two pieces of wire mesh charged with opposite polarity adsorbed both positively and negatively charged pollen and exhibited high pollen adsorption performance. Therefore, we applied the mechanism of pollen adsorption by two pieces of wire mesh to a single wire mesh and attempted to adsorb pollen by switching the positive and negative voltages applied to the wire mesh. As a result, the following were found within the measurement range. 1) The number of pollen grains deposited decreased when switching the positive and negative voltages, except under some conditions. 2) Regardless of the voltage, the deposition reduction rate was more than 40% at intervals of 50 r/min or more, and the maximum rate was 50% at a wire diameter of 0.3 mm, an absolute voltage of 1.0 kV or 2.0 kV, and an interval of 50 r/min. 3) The pollen deposition reduction rate when switching the voltage increases with increasing wire diameter, and the pollen deposition reduction rate can be increased by up to 27 points when the wire diameter is 0.5 mm, the voltage is 1.0 kV, and the interval is 150 r/min. The above shows that when a single wire mesh is charged, the pollen adsorption performance can be improved by switching the voltage.