Central air conditioner capable of self-checking air quality

The utility model discloses a central air conditioner capable of self-checking air quality. An air outlet frame body is arranged on an air outlet notch of an air conditioner indoor unit; wherein the air outlet frame body is formed by splicing four side plates, a mounting column is arranged at each of four included angle positions of the air outlet frame body, a filtering part is arranged at the upper part of the air outlet frame body, and the filtering part is mounted at the top ends of the four mounting columns; a grid part is arranged at the lower part of the air outlet frame body and is mounted at the bottom ends of the four mounting columns; an air self-checking component is arranged in the air outlet frame body and comprises an installation base and an air quality sensor, the installation base is fixed to the inner surface of one side plate of the air outlet frame body, and the air quality sensor is installed in the installation base. By the adoption of the scheme, the air conditioner air outlet detectio