What is the appropriate oxygen concentration for a household oxygen concentrator?

To ask how much oxygen concentration is suitable for household oxygen concentrators, first of all, we need to understand the measurement standard of concentration. There are four main categories: air oxygen concentration, hospital oxygen supply concentration, household oxygen concentrator oxygen concentration, national standard medical oxygen concentrator concentration standard.
1. Air oxygen concentration: Under normal circumstances, the oxygen concentration in the air is generally around 21%. As the altitude increases, the oxygen content gradually decreases. Strictly speaking, if the oxygen concentration in the air is lower than the above value, it is hypoxia, and it depends on the tolerance of each person's body.
2. Oxygen supply concentration in hospitals: industrial centralized oxygen supply, the oxygen concentration of oxygen supply in hospital centers needs to be strictly controlled, according to the standard, it is ≥99.5%. Oxygen therapy will be adjusted according to the patient's condition.
3. Oxygen concentration of household oxygen generators: The oxygen concentration of newly purchased oxygen generators is around 90%-96%. With the increase of use time, the wear and tear of the machine, and the aging of internal electronic components, the oxygen concentration will gradually decrease over time.
4. The national standard medical oxygen concentrator concentration standard: the oxygen concentration of the oxygen concentrator must reach 93%±3% to be considered qualified, mainly because the human body will inhale oxygen with the help of a medical oxygen concentrator, and at the same time, the inhaled part contains 20.98% oxygen purity air, so that the concentration of oxygen actually inhaled will be diluted accordingly.
Many people bought a 1L oxygen generator online. The flow rate can be adjusted from 1L to 6L, but the oxygen concentration will change. When the flow rate is adjusted to 1L, the oxygen concentration is 90%, and when the flow rate is adjusted to 2L, the oxygen concentration When the flow rate is adjusted to 3L, the oxygen concentration is 75%.
That's why the question "What is the appropriate oxygen concentration for a household oxygen generator?" appears.
First of all, it can be made clear that the machine purchased is not suitable for patients, because the oxygen concentration and flow rate cannot meet medical standards.
For example: 3L oxygen concentrator, the oxygen concentration reaches 90% is the 3L oxygen concentrator, which just meets the medical standard. In addition, the oxygen concentration displayed on the so-called 1-6L machine you bought is not the real oxygen concentration, it is the program setting Good default oxygen concentration.
Generally speaking, the molecular sieve of the oxygen generator will wear out after a long time of use, and the oxygen concentration will gradually decrease. However, because the oxygen concentration of this type of machine is controlled by the program, there is no decrease in the oxygen concentration on the display screen, but the real The situation is that the oxygen concentration inhaled by the patient is lower than the oxygen concentration displayed on the display.
In fact, a simple oxygen concentration detector can make the oxygen concentration immediately clear. I hope everyone will not try to buy cheap oxygen concentrators online. When you want to buy products at a price lower than the reasonable profit in the market, fake products will appear.