热泵干衣机风机降噪的研究

Research on noise reduction of heat pump dryer fans

现有热泵干衣机存在运行噪声高的问题,主要原因在于其离心风机气动噪声过高,作为一款家电产品,运行噪声将直接影响用户体验。通过CFD仿真技术,分析原始风机风道方案的流态,定位运行噪声偏高的原因。基于CFD分析的情况,设计了风机风道优化方案,包括针对性地优化了蜗壳的结构和全新设计离心风机。手板样件实验数据显示,在相同风量下,新方案的风机运行转速降低38.3%、噪声值降低2.91 dB(A)。优化分析结果对热泵干衣风机的设计具有指导作用,对相关家电产品的风机设计与优化也具有一定借鉴意义。

The existing heat pump dryer has a problem of high operational noise,mainly due to the excessive aerodynamic noise of the centrifugal fan.As a household appliance,the operational noise directly affects user experience.The flow characteristics of the original fan duct system were analyzed using Computational Fluid Dynamics(CFD)simulation technology to identify the reasons for the high operational noise.Based on the CFD analysis,an optimized fan duct design was proposed,which included targeted optimizations of the volute structure and a completely redesigned centrifugal fan.Experimental data from prototype testing showed that,under the same airflow rate,the new design reduced the fan operating speed by 38.3%and decreased the noise level by 2.91 dB(A).The optimization analysis results provide guidance for the design of heat pump dryer fans and also have implications for the design and optimization of related household appliances.