摘要：通过分析封闭空间内CO2浓度限值及其与呼吸空气供应量的关系，确定了紧急情况下向空调系统提供的呼吸空气量，并结合项目实例介绍了呼吸空气系统方案。
关键词：封闭空间CO2浓度限值呼吸空气供应空调系统安全防护区
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参考文献[1] FSIS Environmental,Safety and Health Group.Carbon dioxide health hazard information sheet[M].Delaware:ESHG-Health,2020:3.
[2] ASHRAE.Ventilation for acceptable indoor air quality:ANSI/ASHRAE Standard 62.1-2013[S].Atlanta:ASHRAE Inc.,2013:38.
[3] 中国安全生产科学研究院，总装备部防化研究院，总后勤部军需装备研究所，等.呼吸防护用压缩空气技术要求：GB/T 31975—2015[S].北京：中国标准出版社，2015:2.
[2] ASHRAE.Ventilation for acceptable indoor air quality:ANSI/ASHRAE Standard 62.1-2013[S].Atlanta:ASHRAE Inc.,2013:38.
[3] 中国安全生产科学研究院，总装备部防化研究院，总后勤部军需装备研究所，等.呼吸防护用压缩空气技术要求：GB/T 31975—2015[S].北京：中国标准出版社，2015:2.
CO2 concentration limits and breathing air supply in enclosed spaces
Abstract: By analysing the CO2 concentration limits in enclosed spaces and their relationship with the breathing air supply, the amount of breathing air provided to the air conditioning system in emergency is determined, and a breathing air system plan is presented based on a project example.
Keywords: enclosed space; CO2 concentration limit; breathing air supply; air conditioning system; safe haven;
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