Inner rotor wind wheel air duct system of ultra-thin sweeper

The utility model provides an ultra-thin sweeper inner rotor wind wheel air duct system which is characterized in that an inner rotor assembly is designed in the sweeper wind wheel air duct system, and two bearings are installed on a lower bearing installation step in the center of a support and an upper bearing installation step in the center of the bottom of a volute end cover to be embedded into a central cavity in the inner side of a stator assembly; the whole inner rotor motor can be installed in an ultrathin mode, the two bearings are stable in supporting, the motor is close to a shaft core during high-speed operation, the centrifugal force torque is small, and the motor is small in vibration and noise at high speed. The upper bearing mounting step and the lower bearing mounting step are embedded, and the step design can be used for adding sealing oil inside to form a waterproof structure, so that the waterproof performance of the motor is improved, and the motor is prevented from absorbing some water v