At present, the ozone generator is a relatively hot selection of disinfection and sterilization equipment. The use of the ozone generator will have a good disinfection and sterilization effect without side effects, but if it exceeds the standard concentration of ozone, it will cause serious harm, so no matter what It is necessary to grasp a certain degree of standard. What are the hazards of exceeding the ozone concentration of the ozone generator?

Hazards of excessive ozone concentration:

　　1. It strongly stimulates the human respiratory tract, causing sore throat, chest tightness, coughing, bronchitis and emphysema;

　　2. Ozone can cause nerve poisoning, dizziness, headache, vision loss, and memory loss;

　　3. Ozone can destroy vitamin E in human skin, causing human skin to wrinkle and dark spots;

　　4. Ozone can also destroy the immune function of the human body, induce chromosomal lesions in lymphocytes, accelerate aging, and cause deformities in pregnant women;

Ozone is a non-toxic and safe gas. When the concentration is higher than 1.5 ppm, ozone stimulates the human respiratory system. For this reason,

The Ozone Association formulates safety and health standards: (1ppm=1 mg/m3)

International Ozone Association: 0.1ppm, exposure for 10 hours

United States: 0.1ppm, exposure for 8 hours

Germany, France, Japan and other countries: 0.1ppm, exposure for 10 hours

China: 0.15ppm, exposure for 8 hours

The product of its concentration and contact time can be regarded as the reference point.

When the ozone concentration is 0.02ppm, people with quick sense of smell can detect it, which is called the sensory threshold. When the concentration is 0.15ppm, it is the olfactory threshold, which can be smelled by most people, and it is also a health standard point. When the concentration reaches 1-10ppm, it is called the irritation range, and when the concentration is above 10ppm, it is the poisoning value.

People's perception of ozone concentration is only 0.02～0.04ppm, and there is still a certain distance from the safe concentration. Use ozone to purify the air indoors, and basically achieve the disinfection effect when the smell of ozone is smelled. At about 0.02ppm, the air will feel particularly fresh. The refreshing feeling in the air after a thunderstorm is due to the large amount of ozone and negative ions produced by lightning. Some scientists have concluded that if there is no ozone in nature, humans will suffer a lot of additional disasters, so the evaluation of ozone is "a godsend purification agent." Since the "discovery" of ozone, no fatal accident has occurred in the world due to ozone poisoning.

The safety concentration of ozone specified by the Ministry of Health is 0.1ppm, and the industrial hygiene standard is 0.15ppm. The labor protection department stipulates that the safe concentration is allowed to work for no more than 10 hours. However, the ozone concentration that people can smell is generally 0.02ppm, which is far from the safe concentration. Because ozone has a strong irritation, people have already avoided it when they feel uncomfortable, so there is generally no poisoning during use.

Ozone is an unstable gas. Its half-life is only about 30 minutes. There is no need to deliberately eliminate it. At room temperature, it will only exist for about 30 minutes at most, and then it will be reduced to oxygen. If you must eliminate it If it is, there are the following methods, one is to let the air flow, dilute the ozone concentration, and finally to eliminate. The second is to heat up, when the temperature reaches about 60 degrees Celsius, the ozone will quickly reduce to oxygen. The third is to use the strong oxidation of ozone. It releases other substances that are prone to oxidation reactions, and neutralizes ozone. (It is more troublesome, and the cost is high, not worth promoting). Ozone gas has a smell and a fresh smell of grass. Human perception of ozone concentration is 0.02-0.04PPM, The U.S. standard states that when the ozone concentration is a safe concentration of 0.1PPM, continuous direct contact is allowed for 10 hours.