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摘要： 依据新版DIN 1946/4阐述了微生物污染的控制思路与要求，提出了新型医用空调机组的性能参数与研发具体要求，认为只有控制了空调机组的二次污染，才能为医院不同类型的受控环境提供切实可行的保障体系。 关键词： 医用空调机组　二次污染 控制思路 控制措施 设计参数 Development of medical air conditioning units based on new edition of DIN 1946/4 By Liu Ming★, Shen Jinming and Zhang Cheng Abstract Based on the microbial contamination controlling thoughts and requirements in the norm, provides the performance parameters and development demand of the medical air conditioning units. Thinks that it could not provide suitable system to control different medical spaces in health care facilities unless its secondary contamination has been controlled. Keywords medical air conditioning unit, secondary contamination, control thinking, control measure, design parameter ★ Shanghai SINKO Air Conditioning Equipment Co., Ltd., Shanghai, China