The special operation rooms for processing or short-term storage of directly-eaten food, including cold dish room, flower decoration room, meal preparation room, and group dining and packaging room, need to be equipped with ultraviolet lamps.

if the ultraviolet lamp is used as the air disinfection device, the ultraviolet lamp (wavelength 211-275 nm) should be set at a power of not less than 1.5W/ m3, and the ultraviolet lamp should be equipped with a reflector with a strength greater than 71 μ W/cm2. The ultraviolet lamps in the special room should be evenly distributed within 2m from the ground. ?

Before each meal (or each use) in the special room, the air and operating table should be disinfected. If the ultraviolet lamp is used for disinfection, it should be turned on for more than 31 minutes when no one is working. ?

generally speaking, there are many factors that affect the service life of ultraviolet lamps, such as ambient temperature, on and off times, lighting time, etc. In fact, there are about three kinds of ultraviolet lamps, namely UVA, UVB and UVC. UVC is the most common ultraviolet germicidal lamp (253.7nm) currently used in industry.

Extended information:

Application of ultraviolet disinfection lamp:

(1) Application in surface sterilization

UV surface sterilization devices are widely used in food, electronics, semiconductors, liquid crystal displays, plasma televisions, crystal vibrators, precision devices, chemical industry, medicine, health care, biology, beverages, agriculture and other fields. UV light source irradiates the surfaces of food and materials, which has a quick, efficient and pollution-free sterilization effect, thus maintaining the high quality of products.

compared with traditional sterilization methods, surface sterilization has the characteristics of high sterilization speed, continuous treatment and batch treatment, simple operation, environmental protection and no secondary pollution.

(2) Application in water treatment

There are two methods to treat water by using ultraviolet germicidal lamp: immersion method and overflow method. Putting ultraviolet lamp directly into water is called immersion method. When the ultraviolet lamp is put into the sleeve, it is called overcurrent.

Overflow method is mainly adopted. The working principle of the over-flow equipment is that the water with a certain flow rate generated by the water pump flows through the periphery of the Shi Ying sleeve which can penetrate ultraviolet rays, and the ultraviolet rays generated by the ultraviolet lamp are used to disinfect and sterilize the water. Its characteristic is that the water flow velocity is very fast, and generally the time when the Shi Ying jacket flows is no more than 1s.

Therefore, the ultraviolet intensity of germicidal lamp is required to be very high, and the surface intensity is generally required to exceed 31,111 UW/cm2.

(3) Application in medical environmental sanitation

The air has been sterilized by ultraviolet disinfection lamps in hospitals for several decades, including static air direct irradiation method and flowing air disinfection method. The static air direct irradiation method uses ultraviolet disinfection lamp for direct irradiation, and its disadvantages are that the places that can't be irradiated can't be disinfected, and people can't be present during disinfection.

The moving air disinfection method adopts dynamic air disinfection machine, which can just make up for the above two defects. The working principle of mobile air disinfection machine is to sterilize the air passing through the sterilizer through indoor air circulation, so as to achieve the purpose of sterilizing the whole indoor air. The structure of this kind of sterilizer mostly adopts the shell of indoor unit of household air conditioner.

Mobile air disinfection machine has developed into various disinfection equipment including sterilization air conditioners and air purifiers. The use is also popular, and the products used only in hospitals in the past have gone to families, offices and announcement places. The functions are also diversified. Products that used to be used only for sterilization can be used for health care and prevention, and become health-related products

Baidu Encyclopedia-ultraviolet disinfection lamp.