Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator
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United States of America Patent
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Jan 27, 2004
Issued Date -
N/A
app pub date -
Jun 29, 1999
filing date -
Jun 16, 1997
priority date (Note) -
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Abstract
A control system for a home ambulatory liquid oxygen system having an oxygen concentrator, condenser, cryocooler, a heater and a storage dewar, includes an oxygen concentration sensor which senses the concentration of oxygen gas generated by the oxygen concentrator and generates a first signal in response thereto; a liquid level sensor which senses the liquid level in the dewar and generates a second signal in response thereto; a temperature sensor which senses the temperature in the dewar and generates a third signal in response thereto; and 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 the storage dewar.
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Family
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