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医院通风分五类,这里主要谈Ⅰ类。无菌要求特别高,室内温度波动不大,保持一定的湿度和余压的房间属Ⅰ类。草案要求手术室中的相对湿度应为50～65％。根据Dunkin和Puck的主张,空气相对湿度应为40～60％,此时空气中细菌死亡率最高。美国采用标准是50～60％。草案规定Ⅰ类房间换气次数为20次/小时,这是根据多年调查,最后用统计学原理求出的。换气次数、房间内含细菌数与房间大小之间存在着一定的关系。从图1可看出调查结果的平均值与定性分析相一致。如果空气
There are five types of ventilation in hospitals. Here I mainly talk about I. Sterility requirements are particularly high, and indoor temperature does not fluctuate. Rooms that maintain a certain degree of humidity and excess pressure are Class I. The draft requires that the relative humidity in the operating room should be 50 to 65%. According to Dunkin and Puck, the relative humidity of the air should be 40 to 60%, with the highest mortality of bacteria in the air. The US standard is 50 to 60%. The draft stipulates that the number of air changes in Class I rooms is 20 times/hour, which is based on years of investigations and is finally determined by statistical principles. There is a certain relationship between the number of air changes, the number of bacteria in the room, and the size of the room. It can be seen from Figure 1 that the average of the survey results is consistent with the qualitative analysis. If the air