冰箱冷凝风道数值模拟及结构优化

为提高冰箱压缩机仓内冷凝器和压缩机的换热效率,降低风道的压力损失,文章通过数值模拟的方法对仓内流场和温度场进行研究,并围绕冷凝风道结构进行优化设计。首先,针对压缩机局部温度较高的问题,选择增加底板出口面积的解决方案,分析不同方案的性能表现;其次,探究散热部件的位置对风道压力损失、冷凝器和压缩机换热系数及压缩机最高温度的影响;最后,通过正交试验得出最优冷凝风道结构。研究表明,冷凝器和压缩机的位置均是影响其换热系数的显著因素,最优风道结构为底板出口方案1、冷凝器位置340 mm和压缩机位置570 mm。与优化前相比风道压力损失降低了1.16%,冷凝器和压缩机换热系数分别增加了1.63%和15.63%,压缩机最高温度降低了11.64℃。

In order to improve the heat transfer efficiency of condenser and compressor in the refrigerator compressor bin and reduce the pressure loss of air duct, the flow field and temperature field in the bin were studied by numerical simulation method, and the optimization design for the structure of condensing air duct was carried out. Firstly, the solution of increasing the outlet area of the bottom plate was selected to solve the problem of high local temperature of the compressor, and the performance of different solutions was analyzed. Secondly, the influence of the position of the cooling components on the pressure loss of air duct, the heat transfer coefficients of condenser and compressor and the maximum temperature of the compressor was studied. Finally, the optimal condensing air duct structure was obtained by orthogonal test. The research shows that the position of condenser and compressor is a significant factor affecting their heat transfer coefficients, and the optimal air duct structure is as follows: the bottom exit scheme 1, the position of the condenser of 340 mm and the position of the compressor of 570 mm. Compared with those before optimization, the pressure loss of air duct is reduced by 1.16%, the heat transfer coefficients of condenser and compressor increase by 1.63% and 15.63%, respectively, and the maximum temperature of the compressor is reduced by 11.64 ℃.