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目的比较昆山市公共场所集中空调通风系统清洗消毒前后卫生状况,了解其清洗消毒效果。方法随机选择昆山地区10家有集中空调的公共场所,对集中空调通风系统清洗前后卫生学指标进行检测,并进行比较,分析清洗消毒效果。结果空调清洗后,通风管道积尘量和送风中可吸入颗粒物(PM)10显著降低。中央空调送风细菌总数与管道积尘中细菌总数呈显著正相关,送风中真菌总数与PM10、送风细菌总数、管道积尘细菌总数、管道积尘真菌总数呈显著正相关。结论集中空调清洗消毒后,积尘量降低明显,但细菌和真菌等指标改善仍不理想,对集中空调的消毒管理仍有待规范。
Objective To compare the sanitary conditions before and after the cleaning and disinfection of centralized air-conditioning and ventilation systems in public places in Kunshan City to understand the cleaning and disinfection effects. Methods Ten public places with centralized air-conditioners in Kunshan were chosen at random, the hygienic indexes before and after cleaning of central air-conditioning and ventilation system were tested, and the cleaning and disinfection effects were analyzed. As a result, the amount of dust accumulated in the ventilation ducts and the amount of particulate matter (PM) 10 in the blast air after air-conditioning cleaning were significantly reduced. The total amount of airborne bacteria in central air conditioners was significantly and positively correlated with the total amount of bacteria in pipe dust. The total number of fungi in air supply was positively correlated with PM10, the total amount of airborne bacteria, the total number of bacteria in pipelines and the total amount of fungi in pipelines. Conclusion After concentrated air-conditioning cleaning and disinfection, the amount of dust is obviously reduced, but the improvement of indicators such as bacteria and fungi is still not satisfactory. The disinfection management of centralized air conditioner is still to be regulated.