冬春两季,风干物燥,易于起火成灾,这是人所共知的。可是为什么“风干”就“物燥”呢?原来,所谓风干,指的是空气的湿度小,物燥指的是可燃材料在空气中的含水率低。而空气的干湿是受气温影响的,可燃材料在空气中的含水率,是受空气中的湿度支配的。空气干燥(风干),材料就蒸发水分,直到与空气中的湿度相等,所以风干必定物燥,风干的可燃物便易于起火,而 Winter and spring two season, air dry, easy to fire disaster, it is well known. However, why “air dried ” “dry” It turned out that the so-called dry, refers to the humidity of the air is small, dry refers to the combustible material in the air is low moisture content. The air is affected by the temperature and humidity of dry and wet, combustible material in the air moisture content, is controlled by the humidity in the air. Air drying (air drying), the material evaporates moisture until it is equal to the humidity in the air, so air dry must be dry, air-dried combustible material is easy to catch a fire, and