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其缺点是安装费用高,使用管道多,造成氟里昂气体泄漏的机会也多,必须定期检修。由于机械制冷装置的优点多于缺点,故现在有90%的冷藏汽车采用这种制冷装置。6.2.2.2 制冷装置的结构人从浴池出来对着电扇吹风的时候,或是皮肤擦上酒精的时候,都有冷的感觉,这是因为水或酒精蒸发要从周围物体吸收汽化潜热所致。制冷装置的工作原理就是根据这个道理,并且把吸收热量汽化的物质叫做制冷剂。
The disadvantage is the high cost of installation, the use of more pipelines, Freon gas leakage caused by more opportunities, must be regularly overhaul. As mechanical refrigeration has more advantages than disadvantages, 90% of refrigerated vehicles now use this type of refrigeration. 6.2.2.2 Structure of the refrigeration unit When people come out from the bath, they feel cold when they blow the fans or when the skin rubs with alcohol, because water or alcohol evaporates and absorbs latent heat of vaporization from the surrounding objects. The working principle of the refrigeration unit is based on this principle, and the material that absorbs heat is called refrigerant.