First of all, you need to understand the negative effects of oxygen! Oxygen is an indispensable gas for human survival. Without oxygen, humans can suffocate and die in just a few minutes. As everyone knows, when the oxygen content is too high, the damage to humans cannot be ignored. In addition, oxygen is a combustion-supporting agent for a variety of combustible gases, and can react with a variety of toxic and harmful gases. Engine oil may cause explosion accidents.   

1. The negative effect of excessive oxygen inhalation:  

If a person is in a pure oxygen environment greater than 0.05 MPa (half an atmosphere), it has a toxic effect on all cells, and if the inhalation time is too long, "oxygen poisoning" may occur. The capillary barrier of the lungs is damaged, causing pulmonary edema, pulmonary congestion and hemorrhage, which seriously affects the respiratory function, and then causes hypoxia and damage to various organs. In a pure oxygen environment of 0.1MPa (1 atmosphere pressure), a person can only survive for 24 hours and will develop pneumonia, eventually leading to respiratory failure and suffocation. People can stay in a high-pressure pure oxygen environment of 0.2 MPa (2 atmospheres) for more than 1.5 hours to 2 hours. If it exceeds that, it will cause brain poisoning, life rhythm disorder, energy disorder, and memory loss. If you participate in oxygen of 0.3MPa (3 atmospheres) or even higher, people will experience degeneration and necrosis of brain cells within a few minutes, convulsions and coma, resulting in death.   

  In addition, excessive oxygen inhalation can also promote the aging of life. The oxygen entering the human body reacts with the oxidase in the cells to generate hydrogen peroxide, which then becomes lipofuscin. This lipofuscin is a harmful substance that accelerates cell aging. It accumulates in the myocardium, aging myocardial cells and reduces heart function; accumulates on the blood vessel wall, causing vascular aging and hardening; accumulates in the liver, weakens liver function; accumulates in the brain , Resulting in a decline in intelligence, diminished memory, people become dazed; it accumulates on the skin, forming age spots.    2. The impact of hypoxia and oxygen enrichment on the human body:    

Oxygen concentration (% volume) omen (at atmospheric pressure)>23.5% oxygen enrichment, there is a risk of violent explosion   

20.9% oxygen concentration is normal   

19.5% oxygen lower allowable concentration     

15-19 % work efficiency is reduced, and it can cause the head, lungs and circulatory system to slow down   

10-12% Shortness of breath, loss of judgment, and purple lips     

8-10% mental loss, syncope, unconsciousness, pale face, purple lips, disgust and vomiting   

6-8% Hardly survived more than 8 minutes 

4-6% convulsions within 40 seconds, breathing stops,    

Other aspects:     

For example, it is used as a combustion aid in cooperation with acetylene, propane and other combustible gases to achieve the effect of welding and cutting metals. It is widely used in various industries, especially in machinery companies. It is also very convenient for cutting and is preferred. An incision method. In underground mines, mines, and places where there is a risk of oxygen leakage, please install oxygen alarms, portable oxygen checkers, and gas checkers such as oxygen meters to ensure the safety of life and property.