STEM与日常科技·英语30篇（5）

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利用静电雾捕获病毒的空气净化器

Standard HEPA filters trap large particles well but struggle with viruses smaller than 0.3 micrometers.
Next-gen purifiers release a fine, positively charged water mist that gently coats airborne viruses and droplets.
This electrostatic fog gives pathogens an electric ‘handle’ so they stick instantly to oppositely charged collector plates.
Lab tests show 99.97% capture of influenza, RSV, and SARS-CoV-2 aerosols within 12 minutes per room.
Unlike UV-C systems, it requires no ozone generation or bulb replacement—just tap water and low-voltage current.
The captured viruses desiccate and lose infectivity on the plate surface within 90 minutes.
Units auto-clean plates every six hours using ultrasonic vibration and gentle rinse cycles.
Energy use stays below 18 watts—less than a nightlight—even in classrooms or clinics.
Independent studies confirm 40% lower absenteeism in schools using these units for one full academic year.
It’s not magic air—it’s physics, fluid dynamics, and thoughtful engineering, quietly protecting breath.