Improved air purifier

The invention discloses an improved air purifier which comprises a shell, a controller and an air purification assembly, the controller and the air purification assembly are both arranged in the shell, the air purification assembly comprises at least one circular filter part, a plurality of fan-shaped frames are evenly distributed on the circular filter part, and filter screens can be arranged inthe fan-shaped frames. The center of the circular filter part is connected with a motor, the motor is electrically connected with the controller, a sensor used for detecting air quality, an air inletchannel and an air outlet channel are arranged on the shell, the fan-shaped frames are rotatably inserted in the air inlet channel, the sensor is electrically connected with the controller, a sterilization assembly is arranged in the air outlet channel, and a draining basket is arranged on the side wall of the air outlet channel. The draining basket is inserted in the air outlet channel in a sliding mode, the controller ca