多联机系统制热模式冷冻油滞留位置分析

Analysis on entrainment position of refrigeration oil in VRF air-conditioning system under heating mode

针对多联机系统制热模式下冷冻油滞留于系统中的情况进行研究,主要对空调系统的气态连接管、液态连接管、室外机换热器和室内机换热器进行理论分析和试验验证。研究结果表明:多联机制热模式下,压缩机冷冻油主要滞留于气态连接管和无开机需求的室内机。

The entrainment situation of refrigeration oil in VRF air-conditioning system under heating mode is studied.The theory analysis and corresponding experimental verification are conducted on the air-conditioning system＇s gas connecting pipe,liquid connecting pipe,heat exchanger of outdoor unit and heat exchanger of indoor unit.The results show that compressor＇s refrigeration oil mostly retains in the gas connecting pipe and the stop-running indoor units under heating mode of VRF air-conditioning system.