Abstract: This paper uses 1D air conditioning simulation to study the effect of the liquid reservoir on refrigerant charge in a plug-in hybrid electric vehicle (PHEV) air conditioning system, using the refrigerant volume fraction in the reservoir as the evaluation metric. The effects of reservoir layout, evaporator inlet air temperature, and reservoir volume are also analyzed. Results show that the refrigerant volume fraction in the reservoir follows a universal pattern, depending mainly on reservoir volume. Under the same calibrated charge, the system tends to be overcharged at high temperatures and undercharged at low temperatures. A larger condenser reservoir widens the system's plateau temperature range, while a larger piping reservoir narrows it.

Key words: plug-in hybrid electric vehicles; mobile air conditioning system; storage tank; the volume proportion of refrigerant

摘要： 文章通过一维空调仿真方法研究了储液罐对插电式混合动力汽车（PHEV）空调系统冷 媒充注的影响，采用储液罐冷媒体积占比来评价系统冷媒充注，同时仿真分析了空调储液罐 布置、蒸发器进风温度变化、储液罐容积变化的影响。结果表明，采用储液罐冷媒体积占比 评价系统冷媒充注是具有普遍性规律的，其仅与储液罐容积高度有关；相同充注标定量下， 高温工况，系统越接近冷媒过量状态，低温工况，系统越接近冷媒欠缺状态；普通空调冷凝 器储液罐容积越大，系统平台期运行温度范围越宽，普通空调管路储液罐容积越大，系统平 台期运行温度范围越窄。

关键词: 插电式混合动力汽车；汽车空调系统；储液罐；冷媒体积占比