Novel Oxygen Concentrator Design | Generating Oxygen Locally ⚡️ Oxyform does not use any solenoid valves or electrical relays, reducing 16 potential failure points. ⚡️ Introduces a custom built PSA valve, that reduces the build cost significantly.
Bharat O2 is a social initiative to design and deploy oxygen concentrators that are simple, scalable, and built with locally available parts.
The 2nd wave of COVID in India has caused an exponential increase in oxygen demand to treat low blood oxygen level - an effect of this infection. The majority of demand is for smaller flow rates of 5-10L/min which can be met with Oxygen Concentrators. They are not in enough supply, and the available ones are expensive enough to be not in reach of many Indians. The demand is expected to persist beyond the current Covid wave as the nation equips itself to prepare for any future waves and spread to rural areas.
Our mission is to solve India’s oxygen concentrator shortage problem through decentralized, community-driven, indigenous design innovations. These innovations are aimed to empower the community, be adopted by SMEs & manufacturers across India and globally, and mass-produce Oxygen concentrators that are easily replicable, scalable to higher oxygen outflow, affordable by masses, and built with locally available parts.
- Build one of these yourself. Improve the design. Suggest avenues for collaboration. Join our telegram channel here
- Connect us to organizations who need oxygen concentrators via email: email@example.com
- Donate to our technical development here Accepting Crypto donation on our ETH wallet address: 0x540677adc37C7e9e9727A3d93b14Ce06A0445566
- First Principles thinking
- Ease of Replicability
- Locally Sourced
- Built to last
Oxyform is a simple to assemble design of Oxygen Concentrator that produces high purity oxygen in emergency situations.
Our design introduces a DIYable 4-way swing valve that completely eliminates the use of conventional parts used in the Pressure Swing Adsorption technique.
- Eliminates 16 mechanical and 6 electrical failure points
- Make Oxygen Concentrator assembly as simple as building lego blocks together
- Easily scalable to higher LPM capacities.
Our current prototype, Oxyform, has delivered 93% oxygen at 5 LPM in a 3-hour stress test.
Are you a social enterprise doing tech for good and interested in scaling this initiative? Please reach out to us, we can help with sourcing, engineering, design, testing and deployment strategies. 💌 Make.Bharato2@gmail.com 📩 Telegram
BUILDING CRITICAL PARTS
Build PSA Valve (Requires knowledge of milling, machining/3D printing)
The timed rotary valve alternately distributes pressure supplied by the compressor to the sieve beds. While one bed is being pressurized the other bed is being exhausted through the valve exhaust port. This is a critical part that requires you to 3D print and mill. The good part about this design is that it eliminates the need for all solenoids and extra orifices in the system, hence decreasing the number of variables and points of error.
🛒 Order a PSA Valve (Coming soon)
Build Sieves and O2 Accumulator
The size of the sieve bed is dependent on the quality of the zeolite.
Approach 1: Integrated 2 Accumulator (Better for professional results)
- For this approach. We recommend not using PVC tubes unless you can seal them properly. Even small leakages affect the flow and quality of O2 yield.
- To minimize errors you can fabricate aluminum sieve beds or buy them off the shelf. Conduct a water test to ensure that there are no leakages in the system.
Approach 2: External O2 Accumulator (Okay Results, chances of leakages)
- Use either PVC or aluminum tubes.
- Test for leakages
Any leakages in the sieve and accumulator beds will lead to immediate pressure leakage which will reduce O2 yield. Therefore double check any leakages.
Observations and Debugging
OBSERVE THE FOLLOWING 👉🏻 The compressor should operate at about 1 bar for 5LPM output. 👉🏻 For confirmation, please do a flame test by holding a match at oxygen output. Please be careful and do this in a well-ventilated space.
POTENTIAL FAILURE POINTS AND DEBUGGING 👉🏻 Poor quality compressor will lead to excessive heating of the system 👉🏻 Poor quality zeolite or contaminated zeolite will impact the nitrogen adsorption leading to low oxygen output. 👉🏻 Any leakage in the system will drop the O2 quality. A FLIR sensor can be used to test for leakages.
Further Reading 📚 Rotary pressure/purge valve (https://patents.google.com/patent/US4787417A/en) 📚 Zhu, X., Wang, X. Experimental study of a rotary valve multi-bed rapid cycle pressure swing adsorption process based medical oxygen concentrator 📚Technical specifications for Oxygen Concentrators by WHO (link)
Disclaimer ❗️ Oxyform has not been clinically tested in a controlled environment and approved for routine use. We release this design under CC BY-NC-ND 2.0 with the intent of encouraging further research and testing. ❗️ The performance of the Oxyform is highly dependent on the quality of zeolite and the compressor. The system (pressure to be applied, sieve bed size, packing density) has to be calibrated for zeolites of different companies and grades. ❗️ Variables like the input pressure and input/output flow rate are crucial to the performance of the Oxyform to achieve desirable results. ❗️ For the desired output of 90% + oxygen purity at 5 LPM, kindly use and assemble the parts as per Oxyform instructions.