Abstract: At present battery is used to be standby power for refuge chamber, but it is high cost, high requirements on the environment, low safety reliability, so a new way was proposed to use air power to save costs, which could increase supply security and reliability, while clean and green. Through the refuge chamber analysis and calculation of electrical equipmentthen,we determine the actual consumption,the specific equipment pneumatic power systems and work processes,it is from the underground refuge chamber pressurized air supply valve and the tank pipe connections, through pneumatic FRL output stability pressure gas driven pneumatic motor rotation, the belt conveyor synchronous operation of the generator power, and then through comprehensive security stable output current. Through field test, the system can work in the chamber to provide an electricity with 127V stable voltage and up to 800W, make the chamber power supply equipment and monitoring equipment operate normally, which ensure the refuge chamber's safety and reliability.

Key words: Refuge chamber, supply system, air motor, generators