实际上，工程机械厂对工程机械空调系统的现场维修，就是到现场根据故障情况尽快地判定出系统中发生质量问题的零部件并对其进行更换，保证用户的正常使用，而对损坏的空调件并不进行修理。1．空调系统的组成及控制原理工程机械空调系统一般由压缩机、蒸发器、冷凝器、储液干燥 In fact, the construction machinery factory on-site maintenance of construction machinery air-conditioning system, is to the scene according to the fault conditions as soon as possible to determine the quality problems in the system components and replacement, to ensure the normal use of users, and damaged air-conditioning Pieces are not repaired. 1. The composition and control principle of air-conditioning system Construction machinery air-conditioning system generally consists of compressors, evaporators, condensers, stock solution drying