半封閉壓縮機電動機故障分析與排除：在中央空調系統中使用的冷水機組，普遍采用半封閉活塞式壓縮機，這種壓縮機的電動機直接接觸制冷
劑和冷凍油，并長期在一定的壓力和溫度下工作，電動機的工作環境比較惡劣。在機組運行維護過程中，如果使用維護不當，往往會引起電動機燒毀，使空調系統無法正常工作。而維修好的冷水機組，其電機往往容易再次燒毀。本文分析認為造成這類壓縮機電動機燒毀故障的主要原因是：系統回油不良；電動機三相電流不平衡；制冷系統含水量大；缺制冷劑運轉；真空運轉；電源電壓過低；異物進入壓縮機等。要想避免維修過的壓縮機電機再次很快就燒毀，必須將產生該故障的原因解決，并且在維修中不能帶入新的故障因素。
關鍵詞：冷水機組半封閉壓縮機電機故障

Abstract：Semi—hermetic compressor often be used in the water—cooling unit of air conditioning system，and it’S motor which work in rather high temperature and pressure condition，even work with refrigerator and oil， has a poor working condition．It will cause some trouble with the motor if the water—cooling unit of the air conditioning system out of operating or mending．However，the motor of water—cooling unit will be destroyed easily after mending． By studying some causing of the motor—trouble in semi—herm etic compressor，it was summarized that the main reasons include that the oil is gotback badly；the three—phase current of the motor is uneven；the water content of refrigeration is large；lack the refrigerator and operate；the vacuum operates；the power is too low in voltage；the ma~er enters compressor，and etc．If you want to prevent the compression—motor of maintenance from trouble soon again，you must solve the reason which produce this trouble
， and can’t be brought into the new trouble factor in maintenance．
Keywords：water—cooling unit，semi—herm etic compressor，motor—trouble