Oil return structure of liquid separator

The utility model relates to an oil return of liquid separator, mainly comprising a storage oil drum, an upper cover, an oil return pipette, etc. The storage oil drum inner is a hollow storage oil groove, the lower end is provided with a bottom cover, and an upper cover can be inlayed into the top of the storage oil drum fixedly, and the upper cover surface is provide with a refrigerant inlet tube and a refrigerant outlet tube which are connected with the drum inner. The point of the device is that the oil return pipette is a pipe body in thin long shape with two ends being connected, the upper end pipe body is fixed in the refrigerant outlet tube, and the tube pipe of the bottom end is provided into a gradual contractile cone shape. Therefore, the utility model has the advantages of simple component, and small volume, which is suitable for miniature freezing air-conditioning refrigerant treatment system, with cost reduced.