Refrigerant recovery machine is a kind of recovery refrigeration equipment, which is used to recover the refrigerant in refrigeration machinery (Civil and commercial air conditioners, freezers, heat pump units, etc.). At the same time of recovery, the refrigerant is also treated, such as drying, impurity filtration, oil separation, etc., so as to facilitate the secondary utilization of the refrigerant. From the perspective of environmental protection and economy, it is widely used in domestic and commercial central air conditioners, refrigerator manufacturers and after-sales services. This equipment does not need to be emptied and placed for a period of time in advance, which reduces operation steps, reduces labor costs and saves storage problems.