Ultraviolet sterilization lamp-the legendary sterilization master

At present, there are many ultraviolet sterilization lamps on the market. You may not be particularly familiar with ultraviolet sterilization lamps. Now, without everyone introducing it, it is actually a low-pressure mercury lamp. Low-pressure mercury lamps use lower mercury vapor pressure (<10-2Pa) to be excited to emit ultraviolet light. There are two main emission spectrum lines: one is 253.7nm wavelength; the other is 185nm wavelength, both of which are invisible to the naked eye.

The working principle of ultraviolet sterilization lamp:

The ultraviolet sterilization lamp and the fluorescent lamp have the same luminescence principle. The mercury atoms in the lamp tube are excited to produce the characteristic spectrum of mercury. The low-pressure mercury vapor mainly produces 254nm and 185nm ultraviolet rays. The sterilization lamp tube is made of transparent violet glass or quartz glass. , So that the ultraviolet rays are transmitted through the tube.

Ultraviolet rays with a wavelength of 254nm are simply absorbed by objects, and have an effect on the genetic material DNA of organisms, causing DNA damage and causing bacteria to die.

The 185nm wavelength ultraviolet light and air effect can produce ozone with strong oxidizing effect, which can effectively kill bacteria, and ultraviolet light can combine with high intensity to kill bacteria and viruses in a short time.

Common uses:

Ultraviolet disinfection has a wide range of uses, such as hospitals, schools, nurseries, cinemas, buses, offices, homes, etc., it can purify the air, eliminate musty odors, and also produce a certain amount of negative oxygen ions.

The air in a room that has been disinfected by ultraviolet rays is particularly fresh. In public places, ultraviolet disinfection can prevent some germs from spreading through the air or through the surface of objects.

However, improper use may also cause certain harm to the human body.

The right amount of ultraviolet light is good for human health. However, exposure to excessive ultraviolet rays will cause harm to the body, especially damage to the eyes. When the skin is irradiated with ultraviolet rays, it can cause vasodilation and erythema. Excessive irradiation can produce diffuse erythema, small blisters and edema. Long-term irradiation can cause dry skin, loss of elasticity and aging. Skin damage caused by ultraviolet rays can cause blood abnormalities and even cancer. After prolonged exposure to ultraviolet rays, the skin may become cancerous in the future.