家用变频空调压缩机高频噪声分析与优化  

Analysis and optimization of high frequency noise of household inverter air conditioner compressor

作　　者：谭书鹏 郭莉娟 叶容君 张肃 TAN Shupeng;GUO Lijuan;YE Rongjun;ZHANG Su(Guangdong Meizhi Compressor Co.,Ltd.,Foshan 528333)

机构地区：[1]广东美芝制冷设备有限公司,广东佛山528333

出　　处：《家电科技》2022年第1期48-50,57,共4页Journal of Appliance Science & Technology

摘　　要：针对家用变频空调压缩机出现的高频噪声突出的问题,从噪声源和传递路径两方面进行了研究。在噪声源方面,基于脉宽控制技术和电机气隙磁场谐波理论研究了高频噪声源的产生机理,明确5000 Hz噪声主要是由控制器载波频率与转子磁动势相互作用形成谐波电磁力波产生,并对高频5000 Hz噪声与载波频率的相关性进行了试验验证。在传递路径方面,明确了电机上部空腔区域壳体刚性较弱引起壳体共振是导致压缩机高频5000Hz噪声较大的核心原因,并通过声辐射仿真分析提出电机上部空腔区域增设隔板和电机上部空腔减短两个优化方案。试验结果表明,电机上部空腔区域增设隔板方案和电机上部空腔减短方案在5000 Hz频段噪声分别改善5.8 dB(A)和6.9 dB(A),验证了优化方案的有效性,为家用变频空调压缩机高频噪声问题改善提供了理论依据和指导。In order to solve the problem of high frequency noise in the compressor of household variable frequency air conditioning, the noise source and transmission path are studied. In terms of noise source, studied the mechanism of high frequency noise based on the pulse width control technology and harmonic theory of motor air gap magnetic field, recognized that 5000 Hz noise were mainly caused by the interaction between controller’s carrier frequency and rotor’s magneto motive force which formed a harmonic electromagnetic wave. Then conducted an experimental verification on correlation of 5000 Hz noise and carrier frequency. In terms of the transfer path, recognized that the shell resonance caused by the weak rigidity in the upper cavity area of the motor was the core reason that leaded to the high noise of the compressor at 5000 Hz. As a result, two optimization schemes of adding a separator in the upper cavity region of the motor and reducing the upper cavity of the motor were proposed through the acoustic radiation simulation analysis method.Then verified the effectiveness of above two optimization schemes that reduced 5.8 dB(A) and 6.9 dB(A) at 5000 Hz noise respectively and provided a theoretical basis and guidance for the improvement of high frequency noise in the compressor of household variable frequency air conditioning.

关 键 词：载波频率 声辐射 高频噪声 压缩机 

分 类 号：TB53[理学—物理]