集中空调供暖期前后污染情况分析

目的了解北方公共场所集中空调通风系统供暖期前后的污染情况及污染特点，加强监督管理和提供清洗建议。方法根据北方特有冬季供暖期的特点，通过对10家商场、宾馆、超市等公共场所分别在冬季供暖开始前和结束前进行集中空调通风系统卫生指标采样检测，分析北方城市特有的污染趋势变化规律。结果在冬季供暖期开始前风管积尘量、风管内表面细菌总数、风管内表面真菌总数的检测项目合格率分别为76．4％，73．O％，100％。集中空调通风系统经过冬季供暖期半年的停用，在冬季供暖期结束前的风管积尘量、风管内表面细菌总数、风管内表面真菌总数的检测项目合格率分别为49．6％，78．0％和98．4％。结论集中空调通风系统经过半年的停用，风管积尘量、风管内表面细菌总数，风管内表面真菌总数都有很大变化，这三项参数的数值和合格率均有不用程度的升高。因此，建议每年在集中空调使用前对其通风系统进行清洗和消毒。

Investigation and Analysis on the Contamination of Central Air Conditioning Systems before and after Heating Period in Northern China

Objectives In order to strengthen the contamination situation of central air conditioning systems supervision and provide cleaning recommendations, the in northern cities were explored. Methods According to the central heating characteristics of northern cities in winter heating period, the samples collected from ten shopping mails, hotels, supermarkets and other public places were tested. The unique pollution trends in northern cities before and after the winter heating period were established. Results The qualified rate of pipeline dust, total bacteria and total fungi was 76.4% ,73.0% and 100% before heating period, and that was 49.6% ,78.0% and 98.4% after the heating period, respectively. Conclusions After six months unrunning, the pipeline dust, total bacteria and total fungi have significant changes. The best time of cleaning and disinfecting central air conditioning systems was just after the heating period.