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第四章制冷系统的选择制冷系统分类的方式很多,有的指制冷机的不同有压缩式,吸收式和蒸汽喷射式等;有的根据制冷剂的不同如氨和氟利昂系统等;有的按制冷剂被压缩次数和膨胀次数分为单级和多级压缩、一次和多次膨胀等;有的视库内冷却设备不同有直接和间接冷却系统;也有根据蒸发器供液的方式分为直接膨胀、重力和强制循环供液。这章主要把小型冷库常用的几种不同制冷系统的选择作简单介绍,以供选择。
The fourth chapter refrigeration system selection Refrigeration system classification in many ways, some refer to the different refrigeration compressor compression, absorption and steam injection, etc .; some according to different refrigerant such as ammonia and Freon systems; some press The number of compression and expansion of refrigerant is divided into single-stage and multi-stage compression, once and multiple expansion, etc .; some depending on the cooling equipment within the library have direct and indirect cooling system; There are also according to the way the evaporator is divided into direct Expansion, gravity and forced circulation of liquid. This chapter mainly to small cold storage commonly used in several different choice of refrigeration system for a brief introduction to choose from.