Research on ultrasonic defrosting in frost-free refrigerators

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Dec.2025, Vol.48 No.12: 1598-1603

DOI: 10.3969/j.issn.1003-5060.2025.12.003

Authors

YANG Heng $ ^{1} $, JIANG Bin $ ^{1} $, ZHAO Rui $ ^{1} $, ZHANG Rui $ ^{2} $

(1. School of Automobile and Traffic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Hefei Anxin Reed Precision Manufacturing Co., Ltd., Hefei 230061, China)

Abstract and Keywords

Abstract: 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.

Keywords: ultrasonic waves; defrosting; simulation; stress; evaporator

作者信息

杨衡 $ ^{1} $，江斌 $ ^{1} $，赵锐 $ ^{1} $，张锐 $ ^{2} $

(1. 合肥工业大学汽车与交通工程学院，安徽合肥 230009；2. 合肥安信瑞德精密制造有限公司，安徽合肥 230061)

摘要和关键词

摘要: 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。

关键词: 超声波；除霜；仿真；应力；蒸发器

Funding

安徽省自然科学基金资助项目（2308085ME177）

合肥工业大学学报(自然科学版)

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