Portable oxygen concentrator
First Claim
Patent Images
1. A portable oxygen concentrator, comprising:
- a plurality of sieve beds adapted to absorb nitrogen from air, each sieve bed comprising an air inlet/outlet end and an oxygen inlet/outlet end;
at least one reservoir communicating with the oxygen inlet/outlet ends of the plurality of sieve beds for storing oxygen exiting from the oxygen inlet/outlet ends of the plurality of sieve beds;
a compressor for delivering air at one or more desired pressures to the air inlet/outlet ends of the plurality of sieve beds;
a set of valves between the compressor and the air inlet/outlet ends of the plurality of sieve beds;
a controller coupled to the valves for selectively opening and closing the valves to alternately charge the plurality of sieve beds by delivering compressed air into the plurality of sieve beds through the air inlet/outlet ends to cause oxygen-enriched gas to exit from the oxygen inlet/outlet ends into the reservoir and purge plurality of the sieve beds by evacuating pressurized nitrogen from the plurality of sieve beds through the air inlet/outlet ends; and
an exhaust passage communicating with the air inlet/outlet ends of the plurality of sieve beds, wherein the exhaust passage is configured to deliver a flow of nitrogen evacuated from the plurality of sieve beds such that the flow of the nitrogen is directed at or across the controller to cool the controller.
3 Assignments
0 Petitions
Accused Products
Abstract
A portable oxygen concentrator includes a pair of sieve beds, a compressor for delivering air to the sieve beds, a reservoir receiving oxygen-enriched gas from the sieve beds, and an air manifold attached to the first ends of the sieve beds. A set of valves operate under the control of a controller for selectively opening and closing the valves to alternately charge and purge the sieve beds to deliver oxygen-enriched gas into the reservoir. In addition, an exhaust passage communicates with the plurality of sieve beds to deliver a flow of nitrogen evacuated from the sieve beds such that the flow of the nitrogen is directed at or across the controller to cool the controller.
-
Citations
10 Claims
-
1. A portable oxygen concentrator, comprising:
-
a plurality of sieve beds adapted to absorb nitrogen from air, each sieve bed comprising an air inlet/outlet end and an oxygen inlet/outlet end; at least one reservoir communicating with the oxygen inlet/outlet ends of the plurality of sieve beds for storing oxygen exiting from the oxygen inlet/outlet ends of the plurality of sieve beds; a compressor for delivering air at one or more desired pressures to the air inlet/outlet ends of the plurality of sieve beds; a set of valves between the compressor and the air inlet/outlet ends of the plurality of sieve beds; a controller coupled to the valves for selectively opening and closing the valves to alternately charge the plurality of sieve beds by delivering compressed air into the plurality of sieve beds through the air inlet/outlet ends to cause oxygen-enriched gas to exit from the oxygen inlet/outlet ends into the reservoir and purge plurality of the sieve beds by evacuating pressurized nitrogen from the plurality of sieve beds through the air inlet/outlet ends; and an exhaust passage communicating with the air inlet/outlet ends of the plurality of sieve beds, wherein the exhaust passage is configured to deliver a flow of nitrogen evacuated from the plurality of sieve beds such that the flow of the nitrogen is directed at or across the controller to cool the controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for concentrating oxygen comprising:
-
providing a portable apparatus comprising;
a plurality of sieve beds, each sieve bed in the plurality of sieve beds including a first end and a second end, a reservoir communicating with the second ends of the plurality of sieve beds, a compressor, a set of valves between the compressor and the first ends of the plurality of sieve beds, and control electronics adapted to control operation of the valves;selectively opening and closing the valves to alternately charge the plurality of sieve beds by delivering compressed air into the plurality of sieve beds through the first ends to cause oxygen-enriched gas to exit from the second ends into the reservoir and purge the plurality of sieve beds to evacuate pressurized nitrogen from the plurality of sieve beds through the first ends; and directing the nitrogen evacuated from the sieve beds at or across the control electronics to cool the control electronics. - View Dependent Claims (10)
-
Specification