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摘要 空调系统的污染治理是节能的重要措施，污染治理可以防止风管积尘、节省清洗费用、降低换热器阻力、避免换热器换热能力降低等。空调系统的污染治理不是指事后清洗，而是用阻隔式过滤器把90%以上的灰尘阻挡在新、回风口之外。 关键词 节能 集中空调系统 污染治理　风管清洗 Contamination control is also an energy saving method: part 2 of the research series of the relationship between contamination control and energy efficiency of air cleaning systems By Pan Honghong★, Zhang Yizhao, Cao Guoqing and Cai Bin Abstract For the air conditioning system, contamination control can prevent or decrease deposition of particles within air ducts, save duct cleaning cost, decline the pressure drop of heat exchangers, and avoid the decrease of heat exchange ability. The contamination control method adopts barrier package, such as filters, to obstruct 90% of total particulate matters from entering air ducts rather than cleaning polluted air ducts. Keywords energy saving, central air conditioning system, contamination control, duct cleaning ★ China Academy of Building Research, Beijing, China