Refuge chamber underground compressed air supply system

The utility model relates to a refuge chamber underground compressed air supply system, belongs to the technical field of refuge chamber air supply and solves the technical problem of providing a refuge chamber underground compressed air supply system which is simple and reasonable in structure and which has the effect of filtering oil stain in compressed air and which ensures high air purity. According to the technical scheme, the refuge chamber underground compressed air supply system comprises an air delivery pipe which penetrates a refuge chamber transition room; an air inlet of the air delivery pipe is disposed outside a refuge chamber, an air outlet of the air delivery pipe is disposed in a survival room of the refuge chamber, the air inlet is provided with a control ball valve, the air delivery pipe is further provided with a branch air supply pipe, the air delivery pipe is provided with three air filters, the bottoms of the front two of the three air filters are both communicated with a discharge pipe, the discharge pipe is provided with a discharge ball valve, the bottom of a refuge chamber transition room is provided with a drainage ditch, and a discharge hole of the discharge pipe is communicated with the drainage ditch. The refuge chamber underground compressed air supply system is simple in structure, has the effect of filtering oil stain in the compressed air, ensures high air purity, and is widely applicable to air supply of refuge chambers.