四通换向阀泄漏对热泵性能影响实验

Experiment study on the influence of four-way reversing valve leakage on heat pump performance

为了研究四通换向阀泄漏状态下对热泵机组性能的影响,搭建了泄漏状态下热泵实验台,采用实验研究的方法,进行了四通换向阀正常和泄漏状态下的对比实验,得到了热泵机组吸排气压力和温度、室内机进出风温差以及压缩机耗功等相关实验参数数据.结果表明:在此实验状态下,四通换向阀的泄漏造成压缩机吸排气压力降低和吸排气温度升高,使得热泵机组向室内的送风温差低至0.9℃,压缩机输入功率为正常状态下的58.6%,严重影响了热泵机组性能.从而为热泵机组的四通阀故障监测和机组性能诊断提供了有益的参考.

To investigate the heat pump performances at the condition of four-way reversing valve leakage,a test-rig was built by which tests were conducted,and experimental data such as pressure and temperature of compressor suction and discharge,air temperature difference through the indoor coil,and compressor power consumed were measured.The experimental results show that the leakage makes the pressures of compressor suction and discharge declined,the temperatures of compressor suction and discharged increased,the air temperature difference of indoor coil lowered to 0.9 ℃,and the compressor input power to be only 58.6% of that without leakage,which means the performance of heat pump has been seriously affected by the leakage of four-way reversing valve.The results are helpful to the fault detection of four-way reversing valve and the performance diagnosis of heat pumps.