Variable speed technology has a great potential for improving energy efficiency and performance of vapor compression refrigeration cycle. Therefore, the study of dynamic characteristics of the refrigeration cycle using this new technology becomes essential. This study experimentally investigates the dynamic behavior of a split R-410A air conditioner comprising variable speed compressor, variable speed condenser fan, three speed evaporator fan and electronic expansion valve. The characteristics of the conditioner have been presented during the startup and shutdown periods. Furthermore, the effect of changing evaporator fan speed during the running of the conditioner has been illustrated and discussed. The influence of evaporator and condenser inlet air temperatures on the power consumption and coefficient of performance of the conditioner has also been investigated. The experimental results show that increasing the condenser entering air temperature by 7 °C, the power consumption has been increased by 18% and the coefficient of performance decreased by 15%.

变速技术在提高能源效率和蒸汽压缩制冷循环性能方面具有巨大潜力。因此，使用这种新技术研究制冷循环的动态特性变得至关重要。这项研究通过实验研究了分体式R-410A空调的动态行为，该空调包括变速压缩机，变速冷凝器风扇，三速蒸发器风扇和电子膨胀阀。调节器的特性已在启动和关闭期间显示。此外，已经示出并讨论了在调节器运行期间改变蒸发器风扇速度的影响。还研究了蒸发器和冷凝器入口空气温度对空调的功率消耗和性能系数的影响。实验结果表明，将冷凝器进气温度提高7°C，功耗增加了18％，性能系数下降了15％。