Patent ID: 6681764
Filing Date: 2004-01-27
Classification: A61M,B01D,F17C,F25B,F25J,Y02C,Y02P

Abstract:
A control system for a home ambulatory liquid oxygen system having an oxygen concentrator, condenser, cryocooler, a heater and a storage dewar, the control system comprising:(a) an oxygen concentration sensor which senses the concentration of oxygen gas generated by the oxygen concentrator and generates a first signal in response thereto; (b) a liquid level sensor which senses the liquid level in the dewar and generates a second signal in response thereto; (c) a temperature sensor which senses the temperature in the dewar and generates a third signal in response thereto; (d) a microprocessor for receiving the first, second and third signals for computing the flow concentration of gaseous oxygen out of the concentrator and into the condenser, the level of liquid oxygen in the dewar, the temperature in the dewar and for controlling the transfer of liquid oxygen from said storage dewar.