20 Jan 2023
The principle of oxygen production of home oxygen concentrator.
There are four main principles of oxygen production in home oxygen generators:
1.Chemical preparation oxygen concentrator
2.Oxygen enriched membrane oxygen concentrator
3.Electronic reaction oxygen concentrator
4.Molecular sieve oxygen concentrator
Chemical preparation oxygen concentrator
Oxygen generators based on the principle of chemical agents.Using sodium percarbonate and manganese peroxide, which react with water to produce oxygen.The advantage is that it is easy to carry and is not affected by the environmental power requirements.But the operation is more complicated, subject to the influence of chemical storage, the use of limited time, not suitable for a large number of use in the home.
Oxygen enriched membrane oxygen concentrator
The principle is to use oxygen-enriched membrane to make the oxygen in the air pass through the oxygen-enriched membrane preferentially under the effect of pressure difference.This method is less noisy and silent most of the time, but the oxygen content is only 30% to 40%.Not suitable in more demanding situations.
Electronic reaction oxygen concentrator
The energy consumption of electrolytic water oxygen generators is generally high.Because of the high energy consumption, so the average household is generally reluctant to use.Electrolysis of water to produce oxygen also produces hydrogen, which will explode when it meets an open flame.Although taking dehydrogenation and other improvement methods, but there are still some safety risks after long-term use of aging.
Molecular sieve oxygen concentrator
Molecular sieve oxygen generators use the variable pressure adsorption method to produce oxygen.Take advantage of the fact that nitrogen has slightly larger molecules and a larger proportion of air.Get more oxygen by removing nitrogen.The raw material is pressurized by a compressor, and then the impurities such as nitrogen and carbon dioxide are removed from the air by an air treatment device to produce a purer oxygen.After the treatment unit reaches a certain saturation amount, the impurities are flushed and the oxygen is released in another cycle.
With the development and progress of technology, oxygen concentrator technology is being corrected and improved step by step.Current aims and methods of improving control include higher requirements in terms of controller intelligence.Use a faster, more human-machine friendly environment to achieve intelligence.This requires a relatively powerful programming controller.Programmable controllers and other controllers that have interactive functions with human-machine interfaces
The development direction of molecular sieve adsorption oxygen generation technology
High performance molecular sieve with higher oxygen and nitrogen separation coefficient.Zeolite molecular sieves are currently the better adsorbents.Its nitrogen and oxygen separation factor can reach 6.0 or more.The oxygen and nitrogen separation factor of zeolite molecular sieves used in industrial production generally does not exceed 4.0.
Low noise level
While preparing high concentration of oxygen, due to the consideration of the household environment.The noise level of the equipment needs to be kept within 30 decibels.Oil-free compressor technology and noise reduction means will be more widely used.
Miniaturization of oxygen concentrators
Oxygen concentrator is mainly used to meet the needs of people's health care and some household needs.Small size, light weight and high reliability are required.Its gas production capacity is generally above or below 5~10L/min, and the oxygen concentration is above 90%.Such as Micitech medical oxygen concentrator CP501 and CP101.This miniaturized, low energy consumption oxygen concentrator equipment will also receive more attention.
Originally published 20 Jan 2023, updated 20 Jan 2023.