网罩、风轮、导风圈对空调室外机风量噪音的影响研究

Research on the influence of mesh enclosure/wind wheel/air-guiden ring on the air volume and noise of air conditioner outdoor unit

基于空调室外机提风量降噪音的设计需求,研究了网罩疏密性、风轮位置和导风圈长度对室外机风量噪音的影响。结果表明:随着出风网罩稀疏性增加,室外机风量增加,同风量下噪音可降低0.5d B,增加出风网罩的稀疏性有利于室外机提风量降噪音。随着风轮前移,室外机风量可增加20~30方,同风量下噪音可下降0.5d B,风轮前移有利于室外机提风量降噪音。随着导风圈长度增加,室外机风量可增加85~100方,同风量下噪音可下降1d B,加长导风圈有利于室外机提风量降噪音。然而增加网罩稀疏性和风轮前移受到设计规范的限制,加长导风圈受到钣金材质和加工工艺的限制。

Based on design requirements for the air volume increase and noise reduction of air-conditioning outdoor unit, this paper studies the influence factors of the mesh enclosure density, wind wheel position and air-guided ring length on air volume and noise of outdoor unit. The result shows that, the air volume increases with the increasing of the mesh enclosure density, the noise change will decrease 0.5 d B under the same air volume. Which illustrate that increasing the mesh enclosure density is conductive to improve the air volume and reducing noise. As the wind wheel moves forward, the air volume outdoor increases about 20~30 m^3/s, while the noise will decrease 0.5 d B under the same air volume. Which illustrate that moving forward the wind wheel is conductive to improve the air volume and reduce noise. The air volume outdoor increases 80~100 m^3/s with the increasing of the air-guided ring length, while the noise can be decreased by 1.0 d B under the same air volume. Which illustrate that increasing the air-guided ring length is conducive to improve the air volume and reduce noise. However, the mesh enclosure density increase and the wind wheel forward both are limited by design specifications, while the length increases of the air-guided ring length is limited by the metal material and processing technology.