超声波用于无霜冰箱除霜的研究

为探究超声波在冰箱除霜中的效果,文章进行仿真和实验分别比较正常系统除霜方式与加载超声波辅助除霜方式的除霜效果。利用COMSOL软件对超声波在蒸发器表面产生的应力进行仿真分析;搭建超声波除霜实验平台,对超声波除霜的实际效果进行测试。结果表明:当超声频率为200 kHz时,蒸发器表面的应力均达到0.4 MPa以上,满足超声波除霜的应力条件;通过加载超声波使蒸发器表面产生声波应力,从而促进冰层的破裂和脱落,除霜时间从1 200 s缩短至300 s,有效地缩短了除霜时间,除霜效率显著提高。该研究表明加载超声波辅助除霜具有很好的节能效果。

In order to explore the effect of ultrasonic waves in refrigerator defrosting, this paper compares the defrosting performance between normal system defrosting method and ultrasonic-assisted defrosting method through simulation and experiments. Firstly, COMSOL software was used to simulate and analyze the stress generated by ultrasonic waves on the evaporator surface. The results show that when the ultrasonic frequency is 200 kHz, the stress on the evaporator surface reaches more than 0.4 MPa, which meets the stress conditions for ultrasonic defrosting. Secondly, an ultrasonic defrosting experimental platform was built to test the actual effect of ultrasonic defrosting. The results show that by loading ultrasonic waves on the evaporator surface, sonic stress can be generated on the evaporator surface, thereby promoting the cracking and shedding of the ice layer. The defrosting time is reduced from 1 200 s to 300 s, effectively shortening the defrosting time and significantly improving the defrosting efficiency. The study demonstrates that ultrasonic-assisted defrosting has a good energy-saving effect.