The two-phase suction injection can reduce the discharge temperature of scroll refrigeration compressors, which work under a high-pressure ratio. The heat transfer along the pipe axis from the shell affects the two-phase suction injection significantly for the compressor with a high-temperature shell. In this paper, the suction mixing and heat transfer model was developed to calculate the heat transfer along the pipe axis from the high-temperature compressor shell. Then the model was coupled with the two-phase compressor model to obtain the compressor performance under different suction injection volume flow rates. The compressor with two-phase suction injection was tested under different injection volume flow rates to validate the model. The results indicated that the discharge temperature decreased by 2 °C when the mass injection ratio increased by 1%. As the injection volume flow rates increased, the total mass flow rate increased due to the reduction of the specific volume of the suction fluid; the input work decreased because of the reduction of specific work and the improvement of the motor's electric efficiency. The cooling capacity decreased since the cooling capacity of the injection refrigerant was wasted for cooling the suction process and the compressor shell, especially at high injection volume flow rates. The coefficient of performance reached the maximum value at the injection volume flow rate of 0.015 m³·h⁻¹ and became lower than the coefficient of performance without injection when the injection volume flow rate raised to 0.035 m³·h⁻¹. Hence, the two-phase suction injection can reduce the discharge temperature efficiently at low injection volume flow rates with a slight improvement of coefficient of performance.

两相吸入喷射可以降低在高压比下工作的涡旋制冷压缩机的排气温度。对于具有高温壳体的压缩机，沿管轴从壳体的传热显着影响两相吸入喷射。在本文中，开发了吸入混合和传热模型来计算从高温压缩机壳沿管轴的传热。然后将该模型与两相压缩机模型相结合，得到不同吸入喷射体积流量下的压缩机性能。在不同的喷射体积流量下测试了具有两相吸入喷射的压缩机以验证模型。结果表明，当质量注入比增加1%时，排气温度降低2°C。随着注入体积流量的增加，由于吸入流体的比容减小，总质量流量增加；由于比功的减少和电机电效率的提高，输入功减少。冷却能力下降，因为注入制冷剂的冷却能力被浪费用于冷却吸入过程和压缩机外壳，尤其是在高注入体积流量时。性能系数在注入体积流量0.015 m时达到最大值 由于比功的减少和电机电效率的提高，输入功减少。冷却能力下降，因为注入制冷剂的冷却能力被浪费用于冷却吸入过程和压缩机外壳，尤其是在高注入体积流量时。性能系数在注入体积流量0.015 m时达到最大值 由于比功的减少和电机电效率的提高，输入功减少。冷却能力下降，因为注入制冷剂的冷却能力被浪费用于冷却吸入过程和压缩机外壳，尤其是在高注入体积流量时。性能系数在注入体积流量0.015 m时达到最大值³ ·h ^-1并且当注入体积流量增加到0.035 m ³ ·h ^-1时变得低于没有注入的性能系数。因此，两相吸入喷射可以在低喷射体积流量下有效降低排放温度，性能系数略有提高。