冰箱蒸发器分段热源除霜实验与仿真研究  

Experimental and numerical study on dynamic characteristics of distributed heaters defrosting for refrigerator evaporator

作　　者：杨易坤 黄东[1] 谌文辉 赵日晶 Yang Yikun;Huang Dong;Shen Wenhui;Zhao Rijing(Department of Refrigeration&Cryogenic Engineering,Xian Jiaotong University,Xian 710049,China)

机构地区：[1]西安交通大学制冷与低温工程系,西安710049

出　　处：《低温与超导》2024年第8期29-37,共9页Cryogenics and Superconductivity

基　　金：国家自然科学基金(51876154)资助。

摘　　要：针对大高宽比的风冷冰箱细高蒸发器竖直方向融霜同步性差的问题,本文对加热器分段优化布置下蒸发器除霜性能进行实验与仿真研究。实验结果表明,上段电加热器在8/19排的最佳布置位置下,竖直方向除霜同步性得到明显改善,融霜滞后时间,冰箱日耗电量和冷冻室箱温回升分别降低10 min,1.72%和1.1℃。仿真结果表明,分段热源在除霜前期与后期拥有更高的除霜速度和除霜效率。除霜时间的缩短使得蒸发器吸热量和冷冻室漏热量出现明显下降,耗电量随之减小。To solve the problem of poor vertical defrosting synchronization of the frost-free refrigerator evaporator with a large aspect ratio,experimental and numerical studies were carried out on the defrosting performance of the distributed heaters with the optimal arrangement.The results show that the vertical defrosting synchronization is significantly improved with the optimal arrangement of the upper section heaters in 8/19 rows,the defrosting lag time,the daily power consumption and the freezer temperature rise are reduced by 10 min,1.72% and 1.1℃,respectively.The numerical results show that,the distributed heater has higher defrosting speed and defrosting efficiency in the early and late defrosting stages.The shortening of defrosting time makes the heat absorption of the evaporator and the heat leakage of the freezer decrease significantly,which is the main reason for the reduction of power consumption.

关 键 词：风冷冰箱 除霜性能 分段加热器 动态仿真 

分 类 号：TB657.2[一般工业技术—制冷工程] TB657.5