company news about What are the factors that affect the effect of ultraviolet disinfection and sterilization?

(1) lamp use time:

Ultraviolet lamp sterilization power with the increase in the use of time and reduce the general ultraviolet lamp 100h after the output power for the rated output power, ultraviolet lamp light time to reach 70% of the rated power for the average life. The average life of household ultraviolet lamps is generally around 2000h: In general, in the ambient temperature of 20'C, relative humidity of 40-60% of the conditions, the sterilization effect of ultraviolet lamps is the best; when the ambient temperature is 0'C, the sterilization effect is less than 60%.

(2) irradiation distance:

500mm from the center of the lamp within the irradiation intensity and distance inversely proportional to; 500mm or more, the irradiation intensity and the square of the distance is approximately inversely proportional to.

(3) Strain:

If it is assumed that the product of irradiation intensity and irradiation time is the irradiation dose, then the required dose of E. coli is 1, staphylococcus, tuberculosis, etc., about 1 to 3, bacillus subtilis and its spores and yeast, etc., about 4 to 8, and mycobacteria about 2 to 50.

(4) Installation method:

The penetration rate of ultraviolet light is low, and is greatly affected by shielding and installation methods. In biological clean rooms, there are generally several installation methods of pendant lamps, side lamps and top lamps, of which the top lamp has the best sterilizing effect.
Due to the limitations of ultraviolet sterilization effect and sterilization may cause harm to the human body, it is now rare to use ultraviolet lamps for comprehensive sterilization of biological clean rooms, only in individual rooms or local areas such as locker rooms, laundry rooms and other uses. Currently, UV sterilization is usually used in conjunction with gas-phase cycle disinfection of HVAC systems.