Environmentally-friendly indoor air changer

The utility model discloses an environmentally-friendly indoor air changer which comprises a cylindrical outer shell. A cylindrical machine core is arranged in the outer shell in a sleeved mode. A filtering screen is arranged at one end of the machine core. At least one circular light blocking plate is arranged in the machine core. The diameter of the light blocking plate and the machine core are the same in inner diameter. A through hole is formed in the light blocking plate. At least one supporting rod is arranged on the light blocking plate close to an opening of the through hole. One end of the supporting rod is fixed on the light blocking plate, and the other end is provided with a light blocking disc. The center line of the light blocking disc and the center line of the through hole are on the same straight line. The diameter of the light blocking disc is larger than or equal to the hole diameter of the through hole. The environmentally-friendly indoor air changer is simple in structure and novel, the e