【作者】 张耀吉； 石丽华； 黄东；

【Author】 ZHANG Yaoji;SHI Lihua;HUANG Dong;School of Energy and Power Engineering, xi’an Jiaotong University;

【机构】 西安交通大学能源与动力工程学院；

【摘要】 数值研究了大容量单循环风冷冰箱冷藏室的流场和温度场,结果表明:箱内搁物架与门体和后背板的前后间隙是顶部冷风下沉的两个主通道;当前送风向上倾斜角度从45°减小至0°时,送风口出风在顶层的漩涡强度减弱,经前间隙下沉的冷气增加,冷藏室各层的平均温度降低,箱内温度分布更加均匀;但随送风角度的减小,箱内温度场改善的效果也逐渐减弱。为防止直吹带来的局部冻结,前送风入射角为25°时效果较佳。更多还原

【Abstract】 The flow field and temperature field of the refrigerating compartment of a large-capacity frostfree refrigerator were numerically studied. The results show that air flows through the front passage between door and shelves and the back passage between back-plate and shelves. The intensity of secondary flow developed from the initial region of the air-supplied ports decreases and the supplied cold air settled through the front passage in increases with the decreased air-supplied angle, which significantly improves the cooling performance and temperature uniformity. However, the effect of air-supplied angle gradually decreases with the decreased air-supplied angle. Considering the direct blowing may cause food freezing, the best airsupplied angle can be selected as 25°.更多还原