Motor assembly of compressor, compressor and air conditioner

The motor assembly of the compressor comprises a rotor, an auxiliary rotor baffle and inner fan blades, the auxiliary rotor baffle is arranged on one axial end face of the rotor, one axial end of the auxiliary rotor baffle is connected with the rotor, and the inner fan blades are arranged at the other axial end of the auxiliary rotor baffle. The inner fan blade comprises a first mounting part and a first fan blade, the first mounting part is fixedly mounted on the end face of the other axial end of the auxiliary rotor baffle, the first fan blade is connected to the radial inner side of the first mounting part in the radial direction of the rotor, and the first fan blade extends in the direction of a center hole of the rotor; the overall structure of the inner fan blade does not exceed the radial periphery of the auxiliary rotor baffle. The inner fan blade structure can be arranged at the axial end, opposite to the closed end of the non-communicating shell, of the rotor, the part of air is effectively utilized