This study experimentally investigated the diffusion range of mold spots on moldy walls under the disturbance of indoor breeze airflow.A mold-release experimental bench was designed to focus on the most commonly used plaster-gypsum building materials on indoor walls.The experiment varied airflow conditions such as airflow speeds(0.2～1.0m/s),airflow angles(0°～90°),temperatures(18℃～30℃),and relative humidity(35％～75％)to understand their impact on mold contamination.The results showed that,even when disturbed by the breeze airflow for a short time(10min),the mold spots on the wall surface had strong contamination diffusion,and their diffusion range could be up to 29 times the diameter of the original mold spots themselves.The diffusion area was seriously contaminated,and the concentration of the molds could be as high as 10CFU/cm2.The range of the surface diffusion of the mold spots increased with the decrease of the relative humidity,the increase of the wind speed,and the reduction of the airflow angle to the wall.The effect of temperature on the release of mold pollutants was weak.The results of the hierarchical analysis showed that the influence of indoor breeze conditions on the spreading range of mold was ranked as follows:airflow velocity(38.65％)＞relative humidity(30.70％)＞airflow angle(30.65％);while temperature showed little effect.The results provide valuable insights into controlling the spread of indoor mold contamination,particularly in understanding the effects of indoor breeze conditions.
维普
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