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目的评价公共场所集中空调通风系统消洗消毒效果。方法依据《公共场所集中空调通风系统卫生学评价规范》(2006年)对天津市46家公共场所102组集中空调通风系统清洗消毒前后相关卫生指标进行监测和评价。结果清洗消毒前后比较,管道积尘量中位数由41.8g/m2降至0.4g/m2,合格率由17.3%(13/60)提高到100%(62/62);积尘中细菌总数和真菌总数中位数分别由14、10cfu/cm2降至1和0cfu/cm2,合格率分别由92.4%(171/185)、82.2%(152/185)提高到99.4%(165/166)、100%(166/166);送风中细菌总数、真菌总数分别由756、382cfu/m3下降为229、120cfu/m3,合格率分别由33.3%(81/243)、62.1%(151/243)提高到79.8%(292/366)、87.7%(242/276)。可吸入颗粒物(PM10)浓度由0.060mg/m3上升至0.068mg/m3,合格率由74.2%(13/60)提高到90.2%(46/51)。结论公共场所集中空调通风系统清洗消毒对改善其送风和管道卫生状况有明显的效果,使用集中空调的公共场所及公共建筑均应定期清洗消毒以保证集中空调的卫生安全。
Objective To evaluate the disinfection and disinfection effect of centralized air conditioning and ventilation system in public places. Methods Based on “Hygienic Evaluation Criteria of Ventilation System of Central Air-conditioning System in Public Places” (2006), the related health indicators before and after cleaning and disinfection of 102 central air-conditioning and ventilation systems in 46 public places in Tianjin were monitored and evaluated. Results Before and after cleaning and disinfection, the median dust accumulation in the pipeline decreased from 41.8g / m2 to 0.4g / m2, and the pass rate increased from 17.3% (13/60) to 100% (62/62) And the median total number of fungi decreased from 14,10cfu / cm2 to 1 and 0cfu / cm2, respectively. The pass rates were increased from 92.4% (171/185) and 82.2% (152/185) to 99.4% (165/166), respectively, 100% (166/166). The total number of bacteria and the total number of fungi decreased from 756,382 cfu / m3 to 229,120 cfu / m3, respectively. The pass rates were 33.3% (81/243), 62.1% (151/243) To 79.8% (292/366) and 87.7% (242/276) respectively. The concentration of respirable particulate matter (PM10) increased from 0.060mg / m3 to 0.068mg / m3, and the pass rate increased from 74.2% (13/60) to 90.2% (46/51). Conclusion The cleaning and disinfection of centralized air-conditioning and ventilation systems in public places have obvious effects on improving the air supply and pipeline sanitation. Public places and public buildings using centralized air-conditioning should be regularly cleaned and disinfected to ensure the hygiene and safety of centralized air-conditioners.