This article will explore require criteria for the design and fabrication of low-cost oxygen concentrators. If you want to contribute to this article, don't hesitate to do so.

Background[edit | edit source]

An oxygen concentratorW is a device in which ambient air flows, raising its pressure and making it flow through zeolite, which is an aluminosilicate that has the property that retains nitrogen particles from the air under pressure, allowing oxygen-enriched air to pass into an accumulator container. When the pressure is lowered, it delivers N2-rich air and heat to the enviroment. The O2 enriched air is used for the treatment of patients with hypoxiaW.

This process has to be designed to get breatheable air with a improved concentration of O2. The O2 concentration values for clinical use are among 95% of pure O2.\

Design criteria[edit | edit source]

Cost[edit | edit source]

Specifications[edit | edit source]

  • Weight: Less than 30 KG
  • Oxygen flow stream: Up to 3 l/min for portable use. Between 5 l/min up to 10 l/min for clinical use. For pediatric use, the system have to provide air flows in order of 0.5 l/min.
  • Input power:Between 40 and 130 W for portable use. Between 280 to 600 W for clinical use. Powered by AC current @ 60 Hz.

Air quality[edit | edit source]

The O2 minimum concentration for clinical use is 82% of O2. Concentrator must have an O2 concentration warning system, if the O2 value drop under 82% in the air mix (in according with ISO 80601-2-69:2014 Medical Electrical Equipment – Part 2-69: Particular requirements for basic safety and essential performance of oxygen concentrator equipment)

Operational Description[edit | edit source]

Fig 1: Oxygen concentrator parts and operation
Component name Function
Case Storage for internal components
Coarse particles filter Big particles filter to give long-lasting inlet compressor filter life
Inlet compressor filter To filter fine particles preventing damages on compressor and valves
Compressor Rise air pressure on system inlet
Fan Fan cooling system
Heat exchanger Remove heat generated in gas compression system
Control circuit To analize input signals, compression and valves arrangement
Valves arrangement To control flow process through zeolite and escape tubes
Zeolite columns To separate oxygen from the inlet mix air
Exhaust muffler To reduce noise in exhaust air rich in N2 area
Accumulator tank To accumulate O2 rich air to produce a steady and continuous flow
Flow meter To control output flow
Output filter Eliminate particles from the output stream
Humidifier Add moisture to output gas before it will be breathed
Oxygen monitor Make sure concentration of oxygen over 82% in the output gas flow

References[edit | edit source]

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