深圳市地铁7号线公共区域集中空调卫生质量评价

Sanitary Quality Evaluation of Central Air Conditioning System in Public Area in Shenzhen Metro Line 7

目的评价深圳市地铁7号线站厅站台集中空调通风排气设施及其卫生质量。方法依据《公共交通等候室卫生标准》(GB 9672-1996)、《公共场所集中空调通风系统卫生规范》(WS 394-2012)、《地铁设计规范》(GB 50157-2013)的要求,对深圳市地铁7号线25座新建地铁站集中空调通风设施及通风管道卫生质量进行现场调查、检测与评价。结果调查发现,2座冷却塔位于新风亭上风侧,且与冷却塔距离较近;3处新风亭地面未硬底化或绿化,2个新风道内设有开放式排水道,垃圾废弃物未清理。经检测,冷却水、冷凝水嗜肺军团菌未检出,风管内表面积尘量合格率100.0%,细菌总数合格率95.69%,真菌总数合格率99.69%。结论 23座车站集中空调卫生状况良好,2座车站新风口存在军团菌污染风险,针对发现的问题提出了整改意见。

Objectives To evaluate the sanitary quality of central air conditioning ventilation facilities in station halls and platforms of Shenzhen Metro Line 7.Methods On the basis of the Hygienic standard for waiting room of public transit means(GB 9672-1996),the Hygienic specification of central air conditioning ventilation system in public buildings'(WS 394-2012),and the Code for design of metro(GB 50157-2013)requirements,field investigation,test,and evaluation of the sanitary quality of central air conditioning facilities and ventilation pipe in newly built Shenzhen Metro Line 7 were detected.Results The investigation showed that some cooling towers were located on the upper wind side of the fresh air pavilion and were close to the cooling tower.Part of the new wind pavilion ground was not rigidified or greened.A small number of fresh air ducts had open-drainage channels and garbage was not cleaned up.Legionella pneumophila was not detected in cooling water or condensate water.The qualified rate of dust in the inner surface of the air duct was 100%,the total qualified rate of bacteria count was 95.69%,and the qualified rate of fungi count was 99.69%.Conclusions The sanitary condition of central air conditioning was good in 23 stations,and the risk of Legionella pneumophila contamination existed in the fresh air outlets of 2 stations.In view of the problems found,suggestions for rectification are put forward.