Rotary air pump

The invention relates to a rotary air pump which comprises a motor, a pump head assembly and a transmission assembly, the transmission assembly is located between the pump head assembly and the motor and comprises a first inner gear ring, a second inner gear ring, a first eccentric wheel and a duplicate gear, and the duplicate gear comprises an upper gear, a lower gear and a center through hole. The first eccentric wheel penetrates through the center through hole and is installed on the duplicate gear, the duplicate gear is located between the first inner gear ring and the second inner gear ring, the first inner gear ring is meshed with the upper gear, and the second inner gear ring is meshed with the lower gear. Through reasonable arrangement, the air pump can rotate while blowing air, the air blowing area can be enlarged, dust can be effectively cleaned, the cleaning efficiency is improved, the structure is compact, the production cost can be saved, and the requirements of users are met. 本发明涉及一种旋转式气泵，包括电机、泵