柜式空调器室内机蜗壳结构的优化设计

Optimization design of volute structure of cabinet air conditioner indoor unit

为提高柜式空调器的节能降噪效果,对室内机的蜗壳原始结构进行优化,将扩压口的左、右侧型线沿顺时针分别旋转角度α、β,得到多种蜗壳型线的改进方案。通过数值计算,将最佳模拟结果对应的型线方案制作手板模型。模拟结果表明:在改进型线后的蜗壳蜗舌、扩压口的左、右侧型线附近以及出口处的流速、静压、总压分布都得到了较大改善,提高了蜗壳出口处的静压和总压。实验结果表明:在不同风速模式下,装有手板蜗壳的整机风量较原型蜗壳提高了3.38~19.9m^3/h,噪声降低1.0~1.2dB(A),风速提高了0.1~0.53m/s。说明改进蜗壳型线对优化风机性能,提高空调器的整机风量和出口风速,降低噪声等起到了积极作用。

In order to improve the effect of energy saving and noise reduction of cabinet air conditioner,the original structure of the volute of indoor unit is optimized.The left and right lines of the diffuser are rotated angle ofαandβalong the clockwise.Multiple kinds of improved schemes of the volute line are obtained.After calculating the different schemes by commercial software,the best simulated results corresponding to volute line scheme is made into hand model.The simulated results showed that the flow velocity,static pressure and total pressure distribution near the volute tongue,left and right lines of the diffuser and outlet of the modified volute are improved significantly.So the static pressure and total pressure at the outlet of the volute are raised.In addition,the experimental results showed that under different wind speed patterns,the air volume of the modified volute is increased by 3.38~19.9 m^3/h.The noise value is reduced by 1.0~1.2 dB(A)and the wind speed is enhanced by 0.1~0.53 m/s.It illustrates that improve the volute line has played a positive role in optimizing the performance of the fan,increasing the air volume and outlet wind speed.Meanwhile,the noise is reduced effectively.