Permanent magnet synchronous frequency conversion and speed regulation integrated electric roller efficient cooling structure

The utility model relates to the technical field of permanent magnet synchronous electric rollers, in particular to an efficient cooling structure of a permanent magnet synchronous variable-frequency and variable-speed integrated electric roller, which is characterized in that cooling water flows into a first cooling loop through a water inlet and a water inlet pipe, flows along a spiral route and exchanges heat with an outer cooling sleeve; after the outer cooling sleeve is cooled, the cooling water flows into the right end of the second cooling loop from the right end, the temperature of the cooling water is not too high, and the cooling water continuously exchanges heat with the outer cooling sleeve through the spiral second cooling loop and flows out through a drainage pipe and a water outlet. The exhaust bolt is unscrewed, air at the highest position of any turn of the first cooling loop flows leftwards and flows out through the thin rod part transverse hole and the threaded part transverse hole, the exh