基于流型调整器结构优化的电子膨胀阀降噪设计  

Noise Reduction Design of Electronic Expansion Valve Based on Structural Optimization of Flow Pattern Regulator

作　　者：刘艳涛 朱天杰 詹飞龙 周绍华 丁国良[2] 冀甲博 郜哲明 Liu Yantao;Zhu Tianjie;Zhan Feilong;Zhou Shaohua;Ding Guoliang;Ji Jiabo;Gao Zheming(GD Midea Refrigeration Equipment Co.,Ltd.,Foshan,528311,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai,200240,China)

机构地区：[1]广东美的制冷设备有限公司,佛山528311 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《制冷学报》2024年第5期114-122,共9页Journal of Refrigeration

摘　　要：空调器中电子膨胀阀入口制冷剂为不稳定的气液两相流型时,容易产生严重的流动噪声。通过在流路中加流型调整器,有望稳定制冷剂流型,从而降低噪声,这需要掌握流型调整器对于噪声的影响机制,在此基础上优化其结构参数。先通过实验验证流型模拟方法的可靠性,然后通过模拟得到典型的制冷剂不稳定弹状流入口条件下,流型调整器孔间隔、厚度、孔径对制冷剂流动噪声的影响规律;并对流型调整器的结构参数进行合理组合,优选得到最有利于降噪的流型调整器结构。研究结果表明:流动噪声随着孔间隔的增大而增大,随着厚度和孔径的增大而先减小后增大。孔径是影响流型调整效果的最主要因素,通过合理设计该参数可以使流动噪声得到最大程度的降低;本文的研究条件下,可以使噪声降低6.88 dB。Electronic expansion valves(EEVs)in air conditioner systems may induce serious flow noise when the refrigerant flows into them with unstable two-phase flow patterns.The addition of a flow pattern regulator in the flow path of an EEV is expected to stabilize the refrigerant flow pattern,thereby reducing flow noise.Therefore,determining the influence of flow pattern regulators on the flow noise of EEVs is essential for optimizing their structural parameters.In this study,a method for flow pattern simulation was verified through experiments.Then,the influence of the structural parameters of the flow pattern regulator,including the hole interval,thickness,and hole diameter,on the flow noise of the EEV under the typical unstable slug flow pattern was determined.Finally,the structure of the flow pattern regulator was optimized by reasonably combining the parameters to minimize the flow noise of the EEV.The results showed that the flow noise increased as the hole interval increased,whereas it initially decreased and subsequently increased as the thickness or hole diameter increased.The hole diameter is the most important factor affecting flow pattern regulation,and flow noise can be significantly reduced by appropriately designing the hole diameter.Under the working conditions of this study,noise was reduced by 6.88 dB.

关 键 词：电子膨胀阀 流动噪声 两相流型 流型调整器 降噪 

分 类 号：TB657.2[一般工业技术—制冷工程] TB53[理学—物理]