The sterilization effect of ozone is ideal when the humidity is 70-80%, and the effect is poor when the humidity is below 45%. Therefore, it should be used in the environment in general use, especially in the sterile room and ward of the pharmaceutical workshop. Add humidity appropriately. When the ozone concentration is 0.02ppm, people with a sensitive 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 influence range. In fact, the safe use of ozone can completely ensure that human health is not harmed. Ozone has been used for more than 100 years, and so far there has been no fatal accident due to ozone poisoning in the world.
When we use ozone for air disinfection, we should pay attention to: the sterilization effect of ozone K is the product of the actual ozone concentration C and the time of action T, namely K=C×T, and the actual ozone concentration C is when the sterilization threshold concentration Cmin is reached, Even if the time is extended, there is no sterilization effect in practice. Ozone used for air disinfection should be configured with different ozone production values and ozone generation concentrations according to different use spaces and different sterilization purposes.Small ozone generator, Ozone generation concentration refers to the concentration in a fixed volume within 30 minutes by the natural dispersion method, the unit is mg/M3, the ozone production value is calculated by the accumulation of the ozone generation concentration and the time, the ozone production value and the ozone concentration are basic Parameter standards. Therefore, ozone disinfection products for the purpose of air disinfection should be marked with disinfection concentration and disinfection time target. There are also two general goals, namely the ozone safety goal of the space used and the product service life goal, which are also required to be indicated to users. Such as general deodorization, deodorization, etc., the concentration is generally not more than 0.05ppm. If it is used for indoor sterilization, it is generally determined at 0.1-1ppm; the surface of the object or the ward area generally requires a higher concentration.
Since ozone can only be produced locally, the most economical and sophisticated method of ozone generation is corona discharge, while the ozone generators used for air disinfection mostly use the form of ceramic high-frequency discharge, which has a simple structure, Reliable performance, low operating cost and sensitive conditioning.
Ozone air disinfection is safe. Ozone safety In a wide range of animal and human experiments, the main exposure route is inhalation. Continued and long-term inhalation experiments show that ozone is not carcinogenic (NTP, 1995); however, it has a significant effect on the respiratory system of animals and humans. , In the exposed environment, it can affect the respiratory function. Therefore, we advocate that the use of ozone to disinfect air should be carried out in an unmanned environment, and personnel can enter only half an hour after disinfection.
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