Patent ID: 7431032
Filing Date: 2008-10-07
Classification: A61M,B01D

Abstract:
1. An oxygen concentrator comprising: a vacuum swing adsorption (VSA) gas separation system operating in VSA cycles including feed, evacuation and repressurization phases, the VSA cycles operating in a range between about 0.1 atm and about 1.0 atm, the system comprising a cartridge containing a mass of adsorbent material (Madsorbent) for producing oxygen, and a drive which activates the gas separation system; a storage reservoir connected to the gas separation system; an oxygen conserver with a dispensing valve connected to the storage reservoir; an electronic control module for controlling the VSA cycles, the electronic control module receiving inputs for cartridge inlet flow rate, cartridge outlet flow rate, gas storage pressure, and dispensing valve nasal pressure, and providing outputs for controlling dispensing valve open time and drive speed; and a power source comprising a mass (Mpowerpack) for powering the drive; wherein the mass of the power source (Mpowerpack) is such that: wherein Qp is a flow rate (in L/min) of oxygen produced by the oxygen concentrator, Mpowerpack is expressed in kg, and time is expressed in hours.