考虑壅塞特性的电子膨胀阀流量特性模型

A Flow Characteristics Model of Electronic Expansion Valve Considering Choking Characteristics

分析了电子膨胀阀内部制冷剂的壅塞流动特性，应用均相流和冷冻流模型描述电子膨胀阀的流量特性，用亚稳态特性系数建立膨胀阀质量流量计算模型，并采用某型号电子膨胀阀的实验数据与所建模型的计算值进行对比．结果表明，该模型的计算值与实测值的偏差在-8．59％～7．56％以内．

The choked refrigerant flow characteristics of electronic expansion valve （EEV） was analyzed. A metastability coefficient was proposed by employing the homogeneous equilibrium flow model and frozen flow model to depict the flow characteristics of EEVs, and the coefficient was applied to build a mass flow model of EEV. The modeling results were compared with the experimental data and the deviation of the predicted metastability coefficient by the model is in the range of -8.59% to 7.56%.