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在客车空绸降温装置或机械保温车的制冷装置中,采用机械压缩式制冷机时,感温自动膨胀阀(节流阀)是其中的一个很重要的组成部分,在制冷系统的设计中,确切地算出从膨胀阀流出的冷媒量,正确地定出膨胀阀的产冷量;确定吸入蒸汽的过热度和冷媒流量间的关系以及使蒸发器的产冷量与膨胀阀的产冷量相配合,都是十分必要的。
In the passenger car empty silk cooling device or mechanical insulation truck cooling device, the use of mechanical compression chillers, temperature sensor automatic expansion valve (throttle) is one of the most important part of the design of the refrigeration system, Accurately calculate the amount of refrigerant flowing out of the expansion valve and correctly determine the cooling capacity of the expansion valve; determine the relationship between the superheat degree of the suction steam and the refrigerant flow rate, and the relationship between the cooling capacity of the evaporator and the cooling capacity of the expansion valve With, are all very necessary.