Dedusting air door automatic opening and closing device and suction cleaner with the same

The utility model discloses a dedusting air door automatic opening and closing device and a suction cleaner with the dedusting air door automatic opening and closing device. The dedusting air door automatic opening and closing device and the suction cleaner with the dedusting air door automatic opening and closing device comprise an air chamber surrounded by an upper cover plate, a lower cover plate and a plurality of side plates. An upper vent opening is formed in the upper cover plate. A lower vent opening is formed in the lower cover plate. The upper vent opening is connected with a tube-shaped upper connecting end. The lower vent opening is connected with a tube-shaped lower connecting end. An air baffle capable of covering the vent opening of the lower connecting end is arranged at one end, located inside the air chamber, of the lower connecting end. The air baffle can rotate within an included angle formed by the horizontal plane and the vertical plane. The dedusting air door automatic opening and closi