Prediction and suppression of whistling noise in electronic expansion valve

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-25 DOI:10.1016/j.ijrefrig.2025.03.038

Shaohua Zhou, Feilong Zhan, Guoliang Ding

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引用次数: 0

Abstract

Whistling noise is the most serious flowing noise in the indoor electronic expansion valve (EEV) of multi-split air conditioners, and it is caused by resonance between the refrigerant flowing at a specific speed and the EEV chamber with a particular opening. The key for avoiding this noise is to identify the noise-generating speed range for a given EEV opening and keep the refrigerant flow speed outside this range. The purpose of this study is to develop a predictive formula for the noise-generating speed range at a given EEV opening. The basic idea for developing the predictive formula is firstly to establish the functional relation between the whistling noise frequency and the refrigerant flow speed, and then to establish the functional relation between the whistling noise frequency range and the EEV opening, and lastly to combine these two relations to determine the noise-generating speed range for a given EEV opening. The predicted lower and upper limits of the noise-generating speed range are validated through experiments on a typical EEV for room air-conditioners using R410A as refrigerant. It is shown that the deviations of these two limits between predicted results and experimental data are both within 0.02 m/s at various EEV openings, meaning that the accuracy of the developed predictive formula for the noise-generating speed range at a given EEV opening is acceptable in engineering applications.

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电子膨胀阀汽笛噪声的预测与抑制

啸声噪声是多分体式空调室内电子膨胀阀（EEV）中最严重的流动噪声，它是由特定速度下流动的制冷剂与特定开度的EEV腔室发生共振而产生的。避免这种噪音的关键是确定给定EEV开孔的噪声产生速度范围，并保持制冷剂流动速度在此范围之外。本研究的目的是建立一个预测公式的噪声产生的速度范围在给定的EEV开度。建立预测公式的基本思路是首先建立汽笛噪声频率与制冷剂流速的函数关系，然后建立汽笛噪声频率范围与EEV开度的函数关系，最后将两者结合确定给定EEV开度时的噪声产生速度范围。通过在R410A为制冷剂的典型室内空调EEV上的实验，验证了噪声产生速度范围的下限和上限。结果表明，在不同的EEV开孔下，预测结果与实验数据的偏差均在0.02 m/s以内，表明所建立的预测公式在给定的EEV开孔下产生噪声的速度范围的精度在工程应用中是可以接受的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.