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目的了解旅客列车空调系统的卫生状况,为空调列车通风系统卫生清洗、消毒工作提供依据方法不同类别列车随机抽样共310节。测定回风管道中的积尘量、细菌总数、真菌总数、β溶血性链球菌:送风口PM10、细菌总数、真菌总数、β溶血性链球菌。结果回风管道中的细菌总数不合格率最高达71.61%、其次为积尘量不合格率为41.61%;不同类别列车之间细菌总数、积尘量、真菌总数差异均有统计学意义。送风管道中的细菌总数不合格率较高为35.48%;不同类别列车之间细菌总数、PM10、真菌总数差异均有统计学意义。快速列车不合格指标明显高于其他列车。β溶血性链球菌均未检出。结论旅客列车空调通风系统部分卫生指标超标严重,应加强对空调系统的定期清洗消毒工作。
Objective To understand the health status of passenger train air conditioning system and to provide a basis for the hygiene cleaning and disinfection of air-conditioned train ventilation system. A total of 310 sections were randomly sampled from different types of trains. Determination of the amount of dust in the return air duct, the total number of bacteria, the total number of fungi, β hemolytic streptococcus: air outlet PM10, the total number of bacteria, the total number of fungi, β hemolytic streptococcus. Results The total number of bacteria in the return air duct was up to 71.61%, followed by the failure rate of 41.61%. The total number of bacteria, the amount of dust and the total number of fungi in different types of trains were all statistically significant. The total number of bacteria in the air supply pipeline was 35.48%. The total number of bacteria, PM10 and total number of fungi in different types of trains were statistically different. Express train failure index was significantly higher than other trains. β hemolytic streptococcus were not detected. Conclusion Some of the hygiene indicators of air conditioning and ventilation system of passenger trains exceed the standard seriously, and the regular cleaning and disinfection of air conditioning systems should be strengthened.