It is found that the superheat may be zero for a long time. A new index, Zero Superheat Time, was put forward, and applied to the electronic expansion valve control.
为此，将零过热度时间作为一个重要的指标，用于电子膨胀阀的启动控制；
By using electronic expansion valve, combining with novel control methods, optimum control of refrigeration system and high energy-saving effects can be realized.
配合新型控制方式，可以实现制冷系统的优化控制和大幅度地提高节能效果。
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