The present invention is a high-pressure compressor is one of the high-pressure air and low-pressure oxygen flows into the chamber, when the low-pressure oxygen flows into the auxiliary pipe when the low-pressure oxygen flows into the auxiliary pipe relatively high pressure air passes through the auxiliary pipe By preventing the backflow of relatively low pressure oxygen, the oxygen of the auxiliary pipe joins the high pressure passing through the main pipe so as to flow smoothly into the chamber, and the high pressure air and the low pressure oxygen are simultaneously used by one compressor. It relates to a high pressure oxygen chamber for supplying low pressure oxygen integrally to the high pressure air to be introduced into, Specific solution means of the present invention, "Main pipe 100 for discharging high pressure air from the high pressure compressor 10, and The main solenoid valve 101 provided in the main pipe 100 and, An auxiliary pipe (110) branching the high pressure air passing through the solenoid valve (101)； In the auxiliary pipe 110, the pressure reducing device 120, the auxiliary solenoid valve 130, the oxygen generator 140 and the oxygen amount regulator 150 are sequentially installed to convert the high pressure from the pressure reducing device 120 to low pressure. After the converted low pressure passes through the oxygen generator 140 and passes through the oxygen amount controller 150, a backflow prevention for preventing backflow of oxygen supplied at a low pressure to a portion where the main pipe 100 and the auxiliary pipe 110 are connected. Integrating low pressure oxygen into the high pressure air, characterized in that the device 20 is provided so that the oxygen of the auxiliary pipe 110 joins the high pressure passing through the main pipe 100 and enters the chamber 30. Supplying high pressure oxygen chamber, The backflow prevention device 20, A coupling space portion 201 is formed to be penetrated in the horizontal direction so that
