Alcohol spraying room can hardly achieve the purpose of disinfection, because the principle of alcohol disinfection is that alcohol at 65%-75% will have a coagulation effect on the protein of pathogenic bacteria, so as to kill the pathogenic bacteria, if the concentration is too low, can not coagulate this protein, so it can not achieve this purpose, if the concentration is too high, it will make the surface of the pathogenic bacteria to form a hard shell, to protect the pathogenic bacteria If the concentration is too high, the pathogenic bacteria will form a crust on the surface to protect the internal structure of the pathogenic bacteria, so the concentration is too low or too high to achieve the purpose of disinfection. Spraying the room with alcohol is difficult to reach a concentration of 65% or more of ethanol, so it is almost impossible to achieve real disinfection. In addition, when the concentration of alcohol reaches such a high level, it is very flammable, and even explosive, because it is in contact with the air in a large area, and a slight spark can cause a local explosion, so it is very dangerous to spray the room with alcohol to disinfect, not only can not achieve the role of disinfection, but also can cause the risk of explosion.