Oxygen concentrator

An apparatus for providing oxygen-enriched air comprising:

• a low pressure oxygen-enriched air separation system for enriching the oxygen content of inlet air, said air separation system adapted to simultaneously provide oxygen-enriched air to a first outlet at a first pressure and adapted to simultaneously provide oxygen-enriched air to a second outlet at approximately said first pressure;
• and
• a pressure intensifier connected to said second outlet to pressurize said oxygen-enriched air and to provide said oxygen-enriched air to a high pressure cylinder at a second pressure;
• wherein said air separation system is capable of simultaneously providing oxygen-enriched air to said first outlet continuously and said second outlet such that a flow of oxygen-enriched air can be supplied continuously to said first outlet while said pressure intensifier is pressurizing said oxygen-enriched air to said second pressure.

Apparatus for providing oxygen-enriched air comprising:

• an air compressor, a low pressure oxygen-enriched air separation system and a pressure intensifier;
• said air compressor being adapted to provide compressed air to said oxygen-enriched air separation system;
• said oxygen-enriched air separation system being adapted to simultaneously provide oxygen-enriched air to a first outlet at a first pressure and to the pressure intensifier at said first pressure, said pressure intensifier being adapted to provide oxygen-enriched air at said second pressure;
• said first outlet having a controller to control the flow of oxygen enriched air at said first outlet;
• wherein said air separation system is capable of simultaneously providing oxygen-enriched air to said first outlet and said second outlet such that a flow of oxygen-enriched air can be supplied continuously to said first inlet while said pressure intensifier is pressurizing said oxygen-enriched air to said second pressure.