Abstract: In order to reveal some relationships between system parameters and R407C incomplete phase changing in condenser and evaporator, a concept is presented firstly, that is the maximum flow rate of heat-transfer fluids. Afterwards thermodynamics cycle analyzing is used, and some important system parameters are given, such as temperature difference between R407C and heat-transfer fluids, compressor discharge capacity. These parameters can affect on the maximum flow rate of heat-transfer fluids, and the results are shown in some figures. Lastly, relationship is discussed too between R407C’s pressure drop in condenser or evaporator and the incomplete phase change.

摘要： 为了揭示热泵系统中R407C在冷凝器和蒸发器中非完全相变与系统参数的关系，首先引出了换热流体极限流量的概念，然后利用热力学循环分析的方法对R407C的非完全相变现象进行了研究，给出了影响R407C非完全相变的几种主要系统参数，如工质与换热流体之间的温差以及压缩机的排气量等，并给出了这些参数与换热流体极限流量之间的定性关系，最后又讨论了换热器内部工质的压降对该工质非完全相变的影响.