论文部分内容阅读
[目的]了解广州市城区公共场所集中空调通风系统的卫生状况,评价清洗消毒通风管道对改善集中空调卫生质量的效果。[方法]2008～2011年,对广州市城区公共场所使用中的集中空调通风系统进行卫生指标检测和评价。[结果]检测2年内清洗消毒过通风管道的集中空调32处,2年内未清洗消毒过的集中空调31处。送风中可吸入颗粒物(PM10)、真菌总数,未清洗消毒的分别为0.163±0.011mg/m3、409±184CFU/m3,清洗消毒的分别为0.075±0.03mg/m3、118±15CFU/m3(P<0.01);细菌总数,未清洗消毒的为637±82CFU/m3,清洗消毒的为548±67CFU/m3(P>0.05)。送风管道中积尘量、细菌总数和真菌总数,未清洗消毒的分别为2.38±0.20g/m2、187±159CFU/cm2、26±13CFU/cm2,清洗消毒过的分别为0.40±0.03g/m2、13±4CFU/cm2、15±5CFU/cm2(P<0.01)。所有样品均未检出β-溶血性链球菌。[结论]2年1次清洗消毒对改善公共场所集中空调通风系统送风和管道的卫生状况有明显的效果。
[Objective] To understand the sanitary condition of centralized air conditioning and ventilation system in public places in Guangzhou city and evaluate the effect of cleaning and disinfecting ventilation ducts on improving the hygiene quality of centralized air conditioners. [Method] From 2008 to 2011, health indicators of central air conditioning and ventilation system in public places in Guangzhou city were tested and evaluated. [Result] Twenty-two central air conditioners were cleaned and disinfected in 2 years and 31 were not cleaned and disinfected in 2 years. Respirable particulate matter (PM10) was found in the air supply. The total number of fungi was 0.163 ± 0.011mg / m3 and 409 ± 184CFU / m3, respectively. The cleaning and disinfection rates were 0.075 ± 0.03mg / m3 and 118 ± 15CFU / m3 respectively P <0.01). The total number of bacteria was 637 ± 82 CFU / m3 for unwashed disinfection and 548 ± 67 CFU / m3 for disinfection and disinfection (P> 0.05). The amount of dust, total number of bacteria and total number of fungi in the air supply pipeline were 2.38 ± 0.20g / m2, 187 ± 159CFU / cm2 and 26 ± 13CFU / cm2, respectively, and the cleaned and disinfected amounts were 0.40 ± 0.03g / m2, 13 ± 4 CFU / cm2, 15 ± 5 CFU / cm2 (P <0.01). No hemolytic streptococcus was detected in all samples. [Conclusion] Cleansing and disinfecting once every two years has obvious effect on improving the hygienic conditions of the air conditioners and ducts of central air conditioning and ventilation systems in public places.