多联机空调系统压缩机贮油量的影响因素分析与试验验证

Analysis and Experiment of Influence on Oil Storage in Compressor

从理论和试验两方面研究了压缩机排油量和系统回油对压缩机贮油量的影响。前者由蒸发温度、冷凝温度决定,后者主要取决于系统运行模式。系统运行模式对制冷剂流速有很大的影响,从而影响回油效果和压缩机贮油量,理论计算和试验结果均表明制冷时回油效果较制热时好。为制定多联机回油控制措施,提供了理论依据。

The analysis and experiment were conducted to investigate the influence of oil discharge capacity from the compressor and oil return from the system on the compressor oil storage in a multi-connected air conditioning system. The oil discharge capacity would be determined by the evaporation temperature and the condensation temperature while the oil return would rely on the running style of the system because of its great influence on the refrigerant flow velocity. The results show that when the system runs in cooling the effect of oil return is better than that when in heating.