Oxygen mixing device of air blower

The utility model discloses an oxygen mixing device of an air blower. The oxygen mixing device comprises an oxygen main pipe, an oxygen distribution pipe, an oxygen distributor and a nozzle assembly. The oxygen mother pipe is communicated with the oxygen distribution pipe and is used for conveying oxygen to the oxygen distribution pipe; the oxygen distributor is communicated with the oxygen distribution pipe; the oxygen distributor comprises an outer ring pipe and an inner ring pipe, the outer ring pipe and the inner ring pipe are coaxially arranged, the inner ring pipe is located in the outer ring pipe, and the annular edges of the two ends of the outer ring pipe are connected with the annular edges of the two ends of the inner ring pipe in a sealed mode to form an annular circulation channel. The nozzle assemblies are distributed on the inner wall of the inner ring pipe and used for spraying oxygen into the outer side, away from the outer ring pipe, of the inner ring pipe to be mixed with air, and when the