冰箱冷藏蒸发器铝回气管与毛细管换热的实验研究

Experimental Research on Aluminum Suction Pipe and Capillary Heat-exchange of Refrigeration Evaporator on Refrigerator

本文针对一台170 L容积的单系统直冷冰箱,在25℃环境温度下,通过研究冷藏蒸发器采用铝回气管与毛细管缠绕换热和分离换热两种换热方式,得出制冷过程各系统点温度变化规律。研究发现长度为1600 mm的回气管与毛细管缠绕换热时,换热效果明显提高,毛细管温度比无换热时低2℃,冷冻蒸发器蒸发温度可以达到-30.5℃,回气管出箱段温度可以达到23.5℃,回气管不会凝露,压缩机无液击风险,制冷系统设计合理。

In this paper,a single-system straight cold refrigerator of 170 L capacity is studied.At 25℃ambient temperature,two methods of heat-exchange is studied,which between aluminum suction pipe and capillary are parcel by aluminum foil,and aluminum suction pipe and capillary are separated.The temperature distribution of various points of each system in the cooling process is obtained.The results show that the effect of heat-exchange is obviously improved with both aluminum suction pipe of 1600 mm and capillary are parcel by aluminum foil.The temperature of capillary is lower 2℃than without heat-exchange.The temperature of evaporation in evaporator can reach-30.5℃,and the temperature of suction pipe out of refrigerator is more than 23.5℃.Condensation don’t occur in the suction pipe,and compressor is free of the risk of liquid slugging.The design of refrigeration system is reasonable.