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目的了解2013—2015年无锡市公共场所集中空调通风系统卫生状况,为规范公共场所集中空调通风系统的监管提供依据。方法依据WS 394-2012《公共场所集中空调通风系统卫生规范》,对72家公共场所的集中空调进行检测和评价。结果 72家被调查单位集中空调通风系统总体合格率47.22%,3年间合格率差异无统计学意义(χ~2=2.96,P>0.05);送风中空气中3年共检测样品687份,可吸入颗粒物(PM10)、细菌总数、真菌总数检测合格数分别为644、647和585份,总体合格率为93.74%、94.18%、85.15%,3年间合格率差异均有统计学意义(χ~2值分别为30.84、10.71、35.65,均P<0.01);风管内表面共检测样品622份,细菌总数、真菌总数的合格数分别为548和572份,总体合格率为88.10%、91.96%,3年间合格率差异有统计学意义(均P<0.01);风管内表面积尘量总体合格率为100.00%。结论无锡市公共场所集中空调通风系统送风口空气、风管内表面卫生状况总体良好,但在细菌总数、真菌总数等方面仍存在卫生隐患,应加强监管。
Objective To understand the health status of central air conditioning and ventilation system in public places in Wuxi from 2013 to 2015 and provide basis for regulating the regulation of central air conditioning and ventilation system in public places. Methods Based on WS 394-2012 Hygienic Standard for Ventilation and Ventilation System in Public Places, 72 central air-conditioners in public places were tested and evaluated. Results The qualified rate of air conditioning and ventilation system in 72 investigated units was 47.22%. There was no significant difference in passing rate in 3 years (χ ~ 2 = 2.96, P> 0.05). 687 samples were detected in the air in air for 3 years, The total number of bacteria and fungi were 644,647 and 585, respectively. The overall pass rate was 93.74%, 94.18% and 85.15% respectively. There was significant difference in pass rate between three years (χ ~ The total number of bacteria and fungi were 548 and 572, respectively. The overall pass rate was 88.10% and 91.96%, respectively. The difference of pass rate in three years was statistically significant (both P <0.01). The overall passing rate of dust on the inner surface of duct was 100.00%. Conclusion The ventilation air in central air-conditioning ventilation system of public places in Wuxi is generally air-conditioned, and the internal surface health status of air ducts is generally good. However, there are still hidden health risks in the total number of bacteria and the total number of fungi, and the supervision should be strengthened.