吸油烟机用离心风机蜗壳降噪优化设计

Optimum Design of Noise Reduction for Centrifugal Fan Volute with Range Hood

吸油烟机蜗壳设计不合理会产生出风不均的噪声,影响产品的心理声学舒适性。本文介绍了吸油烟机用离心蜗壳的设计方法;分析了离心蜗壳产生出风不均的原因;通过仿真分析提出了减弱离心蜗壳出风不均的优化设计方案。实测数据显示,在维持出口流量和出口全压不变的情况下,采用新设计蜗壳出风不均声音得到了改善,同时蜗壳进出风口的噪声声压级平均降低了1.2dB(A)。

Range hood volute design unreasonable will produce uneven wind noise,thus affecting the product＇s psychological acoustics comfort.In this paper,the design method of centrifugal volute has been introduced,and the causes of the uneven wind of the centrifugal volute are analyzed.Then through numerical analysis the optimal design scheme of weakening the centrifugal volute uneven wind has been proposed.The measured data show that the new design volute average sound pressure level reduced by 1.2d B（A） and the sound of uneven wind has been improved,while maintaining the outlet flow and the total pressure of the outlet.