Patent ID: 8535412

Claim:
An adsorption system for separating air into a concentrated gas component, the system comprising: a compressor for receiving and compressing air from an air supply, providing a compressed air supply; molecular sieve material for separating the compressed air supply into a concentrated gas component; a first molecular sieve chamber for receiving the molecular sieve material; a second molecular sieve chamber for receiving the molecular sieve material; a purge device for communicating the concentrated gas component between the first molecular sieve chamber and the second molecular sieve chamber, and wherein the throughput rate of the purge device is modifiable; and a controller for controlling the purge device, wherein the controller is adapted to operate the purge device in a plurality of operating modes including a sound reduction mode in which the purge device allows continuous communication of the concentrated gas component between the first molecular sieve chamber and the second molecular sieve chamber responsive to an output flow rate of the concentrated gas component falling below a threshold level.