Jo Wan-Kuen, Lee Ji-Hyun
The Department of Environmental Engineering, Kyungpook National University, Daegu, Korea.
Arch Environ Occup Health. 2008 Fall;63(3):101-7. doi: 10.3200/AEOH.63.3.101-107.
The authors performed 3 experiments to measure temporal variation in airborne bacterial and fungal levels associated with the use of air conditioners (ACs), heaters, and humidifiers. The concentrations of bioaerosols that they measured inside vehicles and a seminar room prior to use of an AC were lower than or similar to those for outdoor air. In most cases, elevated concentrations occurred 5 to 15 minutes after the use of an automobile or household AC, and these concentrations decreased over time. For 3 of 5 cars, however, the bacterial concentrations did not vary significantly. For cars, the maximum bacterial concentration (2,550 CFU m-3) was 46 times higher than the in-vehicle background concentration (55 CFU m-3). Three fungi (Cladosporium, Penicillium, and Aspergillus) exhibited the highest concentrations for most sampling periods of the ACs and heater. The use of automobile heaters and household humidifiers could suppress in-vehicle and in-room microbial concentrations.
作者进行了3项实验，以测量与使用空调（AC）、加热器和加湿器相关的空气中细菌和真菌水平的时间变化。他们在使用空调之前在车辆和研讨室内测量的生物气溶胶浓度低于或类似于室外空气的浓度。在大多数情况下，使用汽车或家用空调5至15分钟后浓度升高，且这些浓度随时间下降。然而，5辆汽车中有3辆的细菌浓度没有显著变化。对于汽车而言，最大细菌浓度（2550 CFU/m³）比车内背景浓度（55 CFU/m³）高46倍。三种真菌（枝孢菌、青霉菌和曲霉菌）在空调和加热器的大多数采样期表现出最高浓度。使用汽车加热器和家用加湿器可以抑制车内和室内的微生物浓度。
