Low-noise pneumatic fresh air system

The invention relates to the technical field of indoor ventilation of various buildings and aims at providing a low-noise pneumatic fresh air system. The low-noise pneumatic fresh air system comprises an air compression station, an air feeding module, an exhaust module and a pipeline. The air compression station comprises an air compressor, an air storage tank, a filter and a drying machine which are connected in sequence through the pipeline, and used for generating and storing clean and dry compressed air. The air feeding module comprises a draught fan and a purifying humidifier connected with the draught fan and is provided with a fresh air inlet, and the air feeding module is used for driving outdoor air of a building into a room, and feeding processed fresh air into the room of the building through the pipeline. The exhaust module comprises an exhaust filter screen and a draught fan, and is provided with an exhaust port, and the exhaust module is used for exhausting foul air in the room of the building outdoors. The modular type equipment structure is adopted, when the low-noise pneumatic fresh air system is practically used, one or more suitable air feeding modules and exhaust modules can be selected and spliced according to the fresh air amount conveniently, and the limitation of installation conditions of the equipment is greatly reduced.