深圳市某区公共场所集中空调通风系统卫生现况调查

目的]了解深圳市某区公共场所集中空调通风系统的卫生现况,为规范公共场所集中空调通风系统的卫生管理提供依据。方法]随机抽取部分公共场所（3所医院、2家酒店、1所办公楼）的20套集中空调通风系统,依据《公共场所集中空调通风系统卫生规范》对空调系统的卫生指标进行采样检测。结果]所抽取的公共场所集中空调通风系统新风量合格率为40.0%。送风中可吸入颗粒物（PM10）、细菌总数、真菌总数、β-溶血性链球菌合格率分别为64.3%、74.5%、93.9%和100.0%。风管内表面积尘量、细菌总数、真菌总数、β-溶血性链球菌合格率分别为63.1%、100.0%、91.7%和100.0%。冷却水与冷凝水中嗜肺军团菌检测结果合格率为91.9%。结论]该区公共场所集中空调通风系统存在一定程度的污染,应定期清洗消毒,加强卫生管理。

A Survey on the Hygiene of Central Air Conditioning System in a District of Shenzhen

Objective ] To investigate the hygienic status of central air conditioning systems in representative public places in a district of Shenzhen, so as to provide basis for hygienic regulation and m..anagement. Methods ] The hygienic indices of 20 central air conditioning systems from representative public places （3 hospitals, 2 hotels and 1 office building） selected randomly were monitored according to the Specification for Hygiene Management Central Air Conditioning Ventilation System of Public Place. Results ] The qualified rate of fresh air supplement was 40.0%. The qualified rates of PM10, total bacteria, total fungi and β-hemolytic streptococcus counts in supply air were 64.3%, 74.5%, 93.9% and 100%, respectively. The qualified rates of pipeline dust load, total bacteria, total fungi and β-hemolytic streptococcus on the surface of ventilation pipes were 63.1%, 100.0%, 91.7% and 100.0%, respectively. The qualified rate of Legionella pneumophilia was 91.9% in cooling water and condensed water. Conclusion ] Certain degree of contamination existed in part of the central air conditioning systems in this district. Cleaning and disinfection should be conducted regularly, and the supervision on hygienic management should be strengthened.