A device for collecting the bacteria at the inwall of the wind pipe and dust

The utility model relates to a device for collecting bacteria and dust on inner wall of wind pipe , the device is provided with a gear, the gear is driven by a motor, the gear is meshed with a rack, the rack is connected with an electromagnet, the outlet of fan is connected with the electromagnet, the electromagnet is energized to close a collection box, the wind inlet of the collection box is connected with the wind outlet of the collection box, the rack moves up and down in linear bearing by position and reverse rotation of the motor. When in operation, the rack moves to the upper support point so as to reach the designated position; the rack moves to the lower support point so that the sealing cover at the bottom of the collection box and the wall of the wind pipe reach the closed state, and bacteria and dust are separated from the wall of the wind pipe by scraper or scraping, the bacteria, the dust and the airflow are transferred to the collection box by the air pressure generated by the fan, and then cle