Oxygen Concentrator

Oxygen Concentrator

During the second wave of covid-19 in India, the deadly virus has become uncontrollable, infecting a larger number of people than last year. Several big hospitals across India were relying on daily oxygen supplies but they were not getting enough to keep some as backup in case of emergency .Due to this, cases of patients suffering from lack of oxygen have gone up. Unfortunately, it has become very hard to meet the rising demand, creating a huge oxygen cylinder crisis.

On the other hand, preparing oxygen cylinders and transporting them to an area costs a lot of time and effort. Thankfully, a few innovative minds undertook this challenge and designed an oxygen concentrator. SINCGRID has prototyped an Indigenous portable O2 Concentrator based on opensource design with several advancements using 100% Indian components.

While our Efforts were triggered due to INDIAN Crisis – We believe these efforts will help countries and communities worldwide.


 Oxygen Concentrators need :

  • They are Mobile in nature.
  • Do not require a supply chain.
  • Easily runs on domestic electric connection.
  • Require low maintenance .



  Oxygen Concentrators: How It Works?

  1. An oxygen concentrator is a self-contained, electrically powered device designed to concentrate oxygen from ambient air.
  2. Utilising a process known as Pressure Swing Adsorption (PSA), an oxygen concentrator produces up to 95.5% concentrated oxygen.
  3. Atmospheric air is drawn through a gross particle and intake filter before moving through a compressor.
  4. The pressurised air passes through a heat exchanger to reduce the temperature before entering sieve beds that contain zeolite, a mineral material that preferentially adsorbs nitrogen gas (N2) at high pressures.
  5. As each sieve bed is depressurized, N2 is released. Valves open to deliver concentrated oxygen into a reservoir where it accumulates, and from which a flowmeter can be used for measured and continuous release of oxygen to the patient at a specified flow rate.


  Key Points Considered for our Prototype:

  • SINCGRID has studied several open source designs available for construction of the oxygen concentrators. The key criteria were simplicity, ease of assembly, Oxygen Capacity and technical specifications.
  • It was decided to build Proto with the components available locally in India.
  • Proto is built considering the impact of Indian ambient conditions on the performance and accordingly technical enhancements were considered. During sourcing of the components time limitation & strict lockdown restrictions in NEW DELHI where this prototype was built were also considered.


  Working of the SINCGRID’s Oxygen concentrator:

  1. The compressed air is inserted inside an air tank at the bottom.
  2. The air is cleaned and moisture removed with the help of silica gel , further we have added two moisture removers due to India’s humid weather conditioning .
  3. With the help of controllable solenoid valves and the chambers(two Sieves) with zeolite absorb the atmospheric nitrogen that separates the free oxygen.
  4. Afterwards, the air enriched with oxygen moves to a constant pressure reservoir. With the help of a rehydrator, the moisture (that was initially removed by the silica gel) is restored. The opening and closing times of the valves are controlled by a Controller with Relays.






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