Method of generating an oxygen-enriched gas for a user

A method of generating an oxygen-enriched gas for a user via an oxygen generating system, the oxygen generating system including at least one sieve bed having a nitrogen-adsorption material disposed therein, the nitrogen-adsorption material being configured to adsorb nitrogen from a feed gas introduced thereto, thereby generating the oxygen-enriched gas therefrom, the at least one sieve bed having an internal gas pressure within a volume defined by the at least one sieve bed, the method comprising:

• measuring the internal sieve bed gas pressure;
• measuring an ambient atmospheric parameter;
• detecting inhalation of the user;
• selectively controlling, substantially in real time, delivery of the oxygen-enriched gas to the user based on at least one of the internal sieve bed gas pressure measurement, the ambient atmospheric parameter measurement, the inhalation detection, or combinations thereof;
• and
• selectively applying vacuum to the at least one sieve bed during the delivery of the oxygen-enriched gas to the user.

An oxygen generating system, comprising:

• an inlet configured to receive a feed gas including at least nitrogen, oxygen, and water;
• at least one sieve bed configured to generate an oxygen-enriched gas for a user by adsorbing nitrogen from the feed gas via a nitrogen-adsorption process;
• at least one pressure sensor operatively connected to the at least one sieve bed and configured to measure an internal sieve bed gas pressure;
• at least one valve in selective fluid communication with the at least one sieve bed and configured to regulate delivery of the oxygen-enriched gas to the user;
• at least one sensor operatively connected to the oxygen generating system and configured to measure at least one of an ambient atmospheric pressure or an ambient atmospheric temperature;
• and
• a compressor including a suction port, wherein the suction port is operatively and selectively connected to the at least one sieve bed.

A method of generating an oxygen-enriched gas for a user via an oxygen generating system, the oxygen generating system including at least one sieve bed having a nitrogen-adsorption material disposed therein, the nitrogen-adsorption material being configured to adsorb nitrogen from a compressed feed gas introduced thereto, thereby generating the oxygen-enriched gas therefrom, the feed gas being compressed via a compressor, the at least one sieve bed having an internal gas pressure within a volume defined by the at least one sieve bed, the method comprising:

• measuring the internal sieve bed gas pressure;
• measuring an ambient atmospheric parameter;
• detecting inhalation of the user;
• selectively controlling, substantially in real time, delivery of the oxygen-enriched gas to the user based on at least one of the internal sieve bed gas pressure measurement, the ambient atmospheric parameter measurement, the inhalation detection, or combinations thereof;
• and
• selectively applying vacuum, via a suction port of the compressor, to the at least one sieve bed during the delivery of the oxygen-enriched gas to the user.