Explanation of common terms of ultraviolet lamp:
Ultraviolet is referred to as UV for short
Electromagnetic waves with a wavelength of 100nm to 380nm, of which the ultraviolet band with disinfection ability is 200nm to 280nm.
Ultraviolet disinfection
After the pathogenic microorganism absorbs ultraviolet energy with a wavelength between 200nm and 280nm, its genetic material (nucleic acid) is mutated so that the cells no longer divide and multiply, and the purpose of disinfection and sterilization is ultraviolet disinfection.
UV Intensity
Ultraviolet energy received per unit area perpendicular to the direction of ultraviolet radiation per unit time. In this standard, UV intensity is used to describe the UV energy of UV disinfection equipment. The unit commonly uses mW / cm2.
UV transmittance, referred to as UVT
The ratio of ultraviolet light with a wavelength of 253.7 nm after passing through a 1cm cuvette water sample, the unabsorbed ultraviolet light to the total output ultraviolet light.
UV dose
The ultraviolet energy received per unit area is commonly expressed in millijoules per square centimeter (mJ / cm2) or joules per square meter (J / m2).
Reactor average dose, referred to as AD
Simplify the ultraviolet lamp as a point light source, and then use the point light source accumulation method to calculate the average ultraviolet light intensity in the sterilizer, and then multiply the dose obtained by the average exposure time. The average dose is the theoretical dose of ultraviolet disinfection equipment. Since this dose is usually calculated by UVDis calculation software, it is sometimes called UVDis dose.
Equipment ultraviolet effective dose reactor effective dose, referred to as ED
Ultraviolet disinfection equipment can achieve the microbial inactivation ultraviolet dose, or the biological verification dose of ultraviolet disinfection equipment, collectively referred to as the equipment ultraviolet effective dose.
UV Dose-Response Curve
It reflects the relationship between the degree of inactivation or disinfection of a certain microorganism and the ultraviolet dose it receives. The degree of inactivation is usually expressed in log10 (N) or log10 (N / N0), where N0 is the content of microorganisms before ultraviolet irradiation, and N is the content of microorganisms after ultraviolet irradiation.
Low pressure lamp
The mercury vapor lamp operates at an internal pressure of 0.13Pa to 1.33Pa, the input electric power is about 0.5W per centimeter of arc length, the output power of sterilization ultraviolet energy is about 0.2W per centimeter arc length, and the sterilization ultraviolet energy can be output at a single spectrum of 253.7nm wavelength .
Low pressure high output lamp
The mercury vapor lamp operates at an internal pressure of 0.13Pa to 1.33Pa, the input electric power is about 1.5W per centimeter arc length, the sterilizing ultraviolet energy output power is about 0.6W per centimeter arc length, and the sterilizing ultraviolet energy can be output in a single spectrum at a wavelength of 253.7nm .
Medium pressure lamp
The mercury vapor lamp operates at an internal pressure of 0.013MPa to 1.330MPa, the input electric power is about 50W to 150W per centimeter arc length, the sterilizing ultraviolet energy output power is about 7.5W to 23W per centimeter arc length, and the sterilizing ultraviolet energy is 200nm ~ Multi-spectrum output in 280nm sterilization band.
New ultraviolet lamp
After the initial operation of 100h, the UV lamp after stable running-in.
CLH lamp aging factor
The ratio of the UV output power at the end of the operating life of the UV lamp to the UV output power of the new UV lamp.
CJG lamp fouling factor
The ratio of the UV penetration rate of the UV lamp tube in use to the UV penetration rate of the clean UV lamp tube.
Operation life of UV lamp
Continuous or cumulative running time of effective output of UV lamp.
UV disinfector
Cavities and containers that can be irradiated with ultraviolet light. The ultraviolet sterilizer is composed of ultraviolet light, quartz tube, ballast, ultraviolet intensity sensor, cleaning system and other components sealed in the container.
UV modules
The open channel is used as the cavity for ultraviolet irradiation. The ultraviolet lamp module group is composed of an ultraviolet lamp, a quartz tube, a ballast, an ultraviolet intensity sensor, and a cleaning system.
UV disinfection equipment validation
The actual disinfection performance of the UV disinfection equipment should be verified by experiments related to the UV effective dose, UV lamp aging coefficient, and UV lamp tube scaling factor.
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