UV用於空氣清新機
一係有害 一係無效
http://www.toptenreviews.com/health/articles/ionizers-and-uv-lights-potentially-dangerous-tech-in-your-air-purifier/
When an air purifier uses a UV light, it promises to eliminate airborne pathogens. Many point to the UV light hospitals use to purify equipment. In theory, ultraviolet rays will kill the microorganisms passing through your air filter.
However,
this type of purification cleans as much air as your television
. Most UV light cleaners are ozone free and will not damage lungs, but they also
will not actually kill the pathogens. Air purifiers zip air through the filters and out the vents, creating air circulation in a room. Hospital UV lights are effective in killing particles by reducing or eliminating airflow.
Also, air purifier manufacturers do not usually explain what kind of UV technology they used, and
some of these technologies produce high volumes of ozone. Ozone is not an effective or safe way to eliminate airborne pathogens. Since UV lights are not effective purification methods and could generate ozone,
it is best to avoid air filters with this technology, or turn it off.