【摘要】 以CO2作为制冷工质的热泵热水器以其节能和环保等特点越来越受到人们的重视,介绍了几种制冷工质的性质和CO2的跨临界循环。对CO2热泵热水器的国内外发展状况以及热泵系统中的关键部件压缩机的发展状况作了介绍,并提出了现今CO2热泵热水器所需要解决的问题。更多还原

【Abstract】 CO2 is used as a refrigerant for a heat pump water heater,which attracts more and more peoples attention,owing to its energy-saving and environmental protection features.This paper describes the nature of several refrigerants and CO2 transcritical cycle system.The authors make a survey of the domestic and international developments of CO2 heat pump water heaters.The key components of compressors are also presented as well as the problems which need to be resolved.更多还原