引入空气 meaning in English

draw-in air
introduction of air

From the performance analysis of the inverter heat pump air conditioner , heat pump type vrf ( variable refrigerant flowrate ) air conditioning system , two - stage compression inverter air source heat pump , and cooling / heating / how - water inverter air source heat pump , the expanded function and performance improvement of air source heat pump from the variable frequency technology are analyzed in this paper
摘要以变频热泵空调器、热泵型vrf空调系统以及我们提出的双级压缩变频空气源热泵系统、供冷/供热/供生活热水变频空气源热泵系统为研究对象，分析变频技术引入空气源热泵系统带来的功能拓展和性能提升。