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本文研究了多联机室内机电子膨胀阀(EEV)内泄漏对制冷综合部分负荷性能系数(IPLV)的影响。本文进行了两组实验研究,研究结果表明:第一组实验时,有一台室内机膨胀阀始终存在内泄漏,最终IPLV为4.53;第二组实验时,关闭的内机膨胀阀没有明显内泄漏,最终IPLV为4.72,比第一组数据提高了4.2%。从实验结果看出,部分负荷下不开机的室内机膨胀阀存在内泄漏,会导致测试的部分负荷制冷量下降,最终导致多联机IPLV降低。因此在进行多联机IPLV测试时需要关注室内机电子膨胀阀的内泄漏。
This paper studies the effect of leakage in an EEV on the overall load performance coefficient (IPLV) of a refrigeration unit. In this paper, two groups of experimental studies were carried out. The results show that there is always an internal leak in the expansion valve of the indoor unit in the first group of experiments, and the final IPLV is 4.53. In the second group of experiments, the closed internal expansion valve has no obvious internal leakage With a final IPLV of 4.72, an increase of 4.2% over the first set of data. From the experimental results, it can be seen from the experimental results that there is internal leakage in the indoor unit expansion valve under partial load, which will result in the decrease of the partial load of the test and finally the decrease of multi-line IPLV. Therefore, when conducting multi-line IPLV testing, it is necessary to pay attention to the internal leakage of the indoor electronic expansion valve.