Tel：0519-81282888
Frequently Asked Questions
How to Prove the Human Safety of the 222nm Spectrum
Why can the 222nm spectrum effectively disinfect the virus without causing any damage to the skin and eyes?
Do Donghan Medical products tan the skin?
In what institution are Donghan medical products verified, and what institution is that?
What is the difference between Donghan medical products and other disinfection equipment?
What is the principle used to sterilize Donghan medical products?
Why do Donghan medical products use bandpass filters?
How long does it take for East Korean medical products to inactivate 99.99% of the virus?
How long is the lifespan of the light source in Donghan medical products?
Does the National Health Commission agree?
What are the advantages of Donghan medical products?
Donghan medical series products conform to the current national standards GB 28235-2020 and GB/T 18202-2000 and are non-hazardous products, and have a national certification laboratory to issue a test report. According to the authoritative report of the Guangzhou Institute of Microbiology, Donghan medical products can disinfect 99.99% of viruses on the surface of objects and aerosols in the air, and the ozone leakage is 33 times lower than the national standard.
Internationally, Kobe University in Japan used nude mice for skin irradiation experiments, and compared the traditional 254nm spectrum with the 222nm spectrum. After 96 hours of irradiation, it was found that the skin of nude mice irradiated at 222nm did not respond, while at the same time, exposed to 254nm. of nude mice suffered burns. Rats were also used for eye irradiation experiments (the structure of rat eyes is similar to that of humans), and the results of 254nm and 222nm irradiation were also compared.
Chinese Academy of Sciences, Columbia University, Hiroshima University in Japan and many other domestic and foreign research institutes have published papers confirming the safety of 222 nm ultraviolet rays.
Based on basic physical principles, the 222nm spectrum cannot penetrate the stratum corneum of the skin and the tear layer of the eyes, so it is harmless to the human body.
The wavelength of ultraviolet rays that cause skin tanning is above 280nm, which is extremely harmful. It will not only cause the skin to darken, but also damage the basal cells and cause skin cancer. Donghan medical products use nano-scale band-pass filters, which completely filter out wavelengths above 222nm and do not emit 280nm wavelength spectrum, so it will not cause skin darkening.
Donghan medical series products are verified in Guangzhou Institute of Microbiology, and have the qualification of two-in-one certification of National Laboratory Accreditation (CNAS) and Metrology Accreditation (CMA), China's accreditation and international mutual recognition, with very high authority and legal effect .
Donghan medical products are disinfected with pure 222nm spectrum, which is not harmful to human skin and eyes, and does not produce ozone. It can coexist with human and machine, and can be disinfected at any time in 24 hours.
Traditional ultraviolet sterilizers use the 254nm spectrum for disinfection, which may cause skin cancer and eye problems. They must be used in an unmanned environment, and most of them generate ozone, which limits their use in crowded indoor spaces.
Disinfection instruments such as air purification can only eliminate harmful microorganisms in the air, and have no effect on harmful microorganisms attached to the surface of objects and people, and the efficiency is low.
Disinfection of chemical products is harmful to the human body, and there is also the problem of chemical residues. The disinfection persistence is low and it is heavily dependent on labor.
Donghan medical products emit a 222nm spectrum through a chlorinated krypton excimer light source, and emit a pure 222nm spectrum for disinfection, destroying the DNA or RNA molecular structure in bacteria, sporozoites and viruses, making the pathogen inactive and unable to regenerate, thus achieving disinfection.
The deep ultraviolet light emitted by the chlorinated krypton excimer lamp will still be mixed with ultraviolet light in some harmful bands. Our products use special nano-scale band-pass filter filters, double protection, harmful ultraviolet light is completely filtered , truly realizes safe and efficient disinfection, which is also the huge advantage of Donghan Medical's 222 nanometer technology different from other enterprises.
Depending on the distance and the area of the object, at a distance of 1.5 meters, 99.99% of common viruses such as coronavirus and influenza virus can be inactivated in about 5 to 10 seconds.
The service life of the light source is more than 3000 hours.
The "New Coronavirus Pneumonia Prevention and Control Plan" issued by the National Health and Medical Commission pointed out that the virus is sensitive to ultraviolet light.
Donghan Medical has passed ISO9001 quality management system certification, CE, FCC, EPA and many other certifications, and obtained the hygiene license for disinfection product manufacturers. product.
Safety
Donghan products are equipped with core nano-level band-pass filters, which filter clutter with high intensity and emit pure 222-nanometer deep ultraviolet rays, which are not harmful to human skin and eyes, and do not generate ozone. Human-machine coexistence, 24-hour disinfection at any time
efficient
It only takes 5~10 seconds to kill common viruses such as coronavirus and influenza virus, and the killing efficiency reaches 99.99%
Environmental friendly
Does not contain mercury and other harmful substances, will not pollute the environment, sterilization without residue
energy saving
Products with high energy efficiency, low carbon, energy saving and emission reduction
comprehensive
Sterilizes, disinfects and removes mites on the air, objects and body surfaces at the same time, and some products have the function of fresh air
smart
Multi-application mode, multi-scene application space
durable
Light source life > 3000 hours
|
|
0519-81282888
E-mail：market@dohayil.com
Phone：13861240046 13328189833 18052528532
Address：Floor 2, Building D4, Hutang Science and Technology Industrial Park, Wujin District, Changzhou City, Jiangsu Province
