Noise elimination and reduction structure with noise elimination cotton attached to interior of coil pipe air supply and return pipe of hotel guest room

The utility model relates to a noise reduction structure, belongs to the technical field of noise reduction equipment, and particularly relates to a noise reduction structure with noise reduction cotton attached in a coil air supply and return pipe of a hotel guest room, which comprises an air return box internally provided with a fan, the air return box is communicated with an air supply pipe in a sealed manner, and a main coil pipe is arranged in the air return box. The air return box is fixed to a floor through a plurality of hanging rods, a plurality of rubber pads are arranged at the joints of the hanging rods and the air return box, sound insulation cotton is arranged in the inner walls of the main coil pipe, the air return box and the air supply pipe, a layer of galvanized hole plate is arranged on the inner wall of each sound insulation cotton, and an aluminum filter screen and an air return shutter are arranged at the joint of the bottom of the air return box and the suspended ceiling. According to t