卧式敞开式食品冷藏陈列柜出风口设计参数优化

Design parameter optimization of outlet for open horizontal food refrigerated display cabinet

卧式敞开式食品冷藏陈列柜的冷藏性能与出风口的形式有很大关联,为了达到更佳的食品冷藏效果和节能的目的,针对两种不同形式的出风口(导流板式和蜂窝式)的卧式敞开式食品冷藏陈列柜,在装载有冷冻负载(M包)的情况下进行柜内温度场的实验测试与数值模拟,并对蜂窝式出风口的出风角度、蜂窝层数及出风速度进行优化。结果表明:优化前使用蜂窝式出风口时,M包最高温度低于使用导流板式出风口时,但回风温度更高。经过优化,蜂窝式出风口的出风角度-3°、蜂窝层数6层、出风速度0.9 m/s时,回风温度及M包最高温度均低于使用导流板时。因此,使用优化后的蜂窝式出风口可使陈列柜冷藏效果及节能水平得到有效提升。

The refrigeration performance of the open horizontal food refrigerated display cabinet is greatly related to the form of the outlet.In order to achieve better food refrigeration effect and energy saving purpose,the experimental test and numerical simulation of the temperature field in the cabinet of two different forms of the outlet（ guide plate type and the honeycomb type） with M package of refrigeration load were done.Air supply angle,honeycomb layers and air supply velocity of honeycomb type outlet were optimized.The results showed that before the optimization of the honeycomb outlet,the highest temperature of the M package was lower than that of the guide plate outlet,but the air temperature was higher.The resualts showed that when the outlet of the honeycomb angle was-3°,the honeycomb layer was 6,and the supply velocity was 0.9 m / s,the return air temperature and the highest temperature of M package were both lower than that of the guide plate.Therefore,the optimization of the honeycomb outlet could improve the refrigeration effect,achieve energy saving.