Therefore, research on fault diagnosis of the air-conditioning and refrigeration systems is very vital to ensure the running of the systems normally, stably and efficiently.
因此，为了保证系统能正常、稳定、高效地运行，对空调制冷系统进行故障诊断研究是十分必要的。
2
Diagnosis and forecast of refrigerant leakage in the refrigeration system;