Regardless of the water purifier or the water dispenser, in the initial state, the microbiological indicators in the water quality are all qualified, but with the use process, the time will be different for a long time.
The degree of breeding of bacteria, in severe cases, will cause so-called secondary pollution, endangering the normal use of water purifiers and water dispensers.
The UV exposure dose required to inhibit bacterial growth is only about 1/40 of the normal bactericidal dose. Just use a 1-1.6mW wavelength in a pure water tank.
275nm UVC-LED, working for 1-2 minutes per hour, can achieve satisfactory results in inhibiting bacterial growth. Such a high cost performance will bring deep ultraviolet
LED is widely used in the water field.
UVA band, wavelength 315 ~ 400nm, also known as long-wave black spot effect ultraviolet light. It has a strong penetrating power and can penetrate most transparent glass
And plastic. UVA can directly reach the dermis layer of the skin, destroy elastic fibers and collagen fibers, and tan the skin, which will cause some damage to human skin. UVA
The antibacterial and bactericidal ability is poor, and it is mainly used in the fields of photocuring and photochemical action.
UVB band, wavelength 280 ~ 315nm, also known as medium wave erythema effect ultraviolet light. UVB UV has an erythema effect on the human body, and a small dose for a short time
Irradiation can promote mineral metabolism and vitamin D formation in the body, UVB has a certain bactericidal ability.
UVC band, wavelength 100 ~ 280nm, also known as short-wave sterilization UV, can effectively kill a variety of microorganisms, including bacterial propagules, spores,
Mycobacteria, viruses, fungi, rickettsia and mycoplasma, etc., all surfaces, water and air contaminated by the above microorganisms can be UV-band UV
Line sterilization, its sterilization efficiency can be as high as 99% or more, and because of its high efficiency sterilization characteristics, UVC is widely used in medical, health, civil and other fields.