变频冰箱全制冷周期降噪方案研究

Research on the noise reduction scheme of the full refrigeration cycle of the inverter refrigerator

冰箱噪声是用户使用中关注的主要性能指标之一,传统的声功率级评价方法不能准确反应冰箱的真实噪声波动大小。变频冰箱在全制冷周期的不同阶段声功率级大小不同。以声压监测的方法,研究变频冰箱全制冷周期内噪声变化规律,获取不同噪声频谱分布特征,分析各类噪声产生的原因,提出改进优化方案并验证。通过优化压缩机转速控制,降温过程整机最大噪声降低1.8 dB(A)。通过优化风门与风道装配结构,风门运行噪声可降低超过2 dB(A)。通过声压监测的方式,评估变频冰箱全制冷周期内的噪声波动范围,并对各类噪声提出了优化方向。实践证明,部分降噪方案对不同类型的产品具有适用性。

Refrigerator noise is one of the main performance indicators that users pay attention to during use.The sound power level evaluation method cannot accurately reflect the real noise fluctuation of the refrigerator.Inverter refrigerators have different sound power levels at different stages of the full refrigeration cycle.Using the method of sound pressure monitoring,study the noise change rule of the inverter refrigerator during the whole refrigeration cycle,obtain different noise spectrum distribution characteristics,analyze the causes of various types of noise,propose improvement and optimization plan and verify.By optimizing the speed control of the compressor,the whole cooling process a maximum noise reduction 1.8 dB(A).By optimizing the assembly structure of the damper and the air duct,the operation noise of the damper can be reduced by more than 2 dB(A).Through the sound pressure monitoring method,the noise fluctuation range during the full refrigeration cycle of the inverter refrigerator is evaluated,and the optimization direction of various noises is proposed.Proved by practice,some noise reduction schemes are applicable to different types of products.