Using the physical properties of condensation of ammonia and air at different temperatures, the air that cannot be liquefied in the refrigeration system is separated from the air separator. When the air separator is used, the cold source used uses the ammonia liquid from the liquid receiver to enter the coil in the air separator through throttling, and the heat of the mixed gas in the separator is absorbed in the coil to evaporate, while the ammonia in the mixed gas is evaporated. The gas is liquefied after being cooled, and the air is separated out because it cannot be condensed. It is discharged through the vent valve, and the liquefied ammonia enters the refrigeration system for reuse.

In ME-B and MC diesel engines, the starting air distributor plays the role of controlling the opening and closing of the cylinder head starting valve according to the firing sequence of the diesel engine. It is a key component in the starting process of the diesel engine. It is mainly composed of driving gear, reversing plate, distribution plate, casing, end cover, reversing cylinder, forward and reverse interlocking valve and transmission shaft.