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本文报导了对非共沸混合制冷剂Ｒ２２／Ｒ１４２ｂ在毛细管内流动过程中亚稳态流特性的试验研究．试验测取了在不同的流动工况和不同的工质混合比下的温度和压力沿毛细管长度的分布，通过工质混合法则求取了各测点的热物性参数，再由图示法确定亚稳态流的定量规律．试验结果表明，在采用非共沸混合工质时，毛细管内仍然存在着亚稳态流现象，同时，指出了对非共沸混合工质在毛细管内汽化过程中的亚稳态流现象进行理论分析的必要性．
This paper reports the experimental study on the metastable state characteristics of non-azeotropic refrigerant R22 / R142b during capillary flow. The distribution of temperature and pressure along the length of the capillary tube under different flow conditions and mixing ratio of working fluid was measured. The thermal parameters of each measuring point were determined by the mixing rule of working fluid, and then determined by the graphic method Quantitative rules of metastable flow. The experimental results show that the metastable state still exists in the capillary when using a non-azeotropic mixture, and at the same time, the theory of the metastable state in the capillary vaporization of the non-azeotropic mixture is pointed out Necessity of analysis.