Hot air recovery device

The utility model relates to the technical field of hot air recovery devices, and discloses a hot air recovery device which comprises a hot air recovery machine, a waste gas box is fixedly installed on the top of the hot air recovery machine, an exhaust groove is fixedly installed on the left side of the hot air recovery machine, and a movable assembly is arranged in the hot air recovery machine. The hot air recycling device comprises a hot air recycling machine and a movable assembly, the movable assembly comprises a fixed plate, the fixed plate is fixedly installed in the hot air recycling machine, and a thermal expansion air bag is placed in the hot air recycling machine. According to the hot air recovery device, the convenience of workers in work can be greatly improved while collection is conducted, pollution to the environment is reduced, angle adjustment is conducted under the action of the movable assembly when the air suction machine works, and therefore the comprehensiveness of waste gas suction of