STEM与日常科技·英语30篇（5）
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Air Purifiers That Capture Viruses Using Electrostatic Fog
利用静电雾捕获病毒的空气净化器
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Standard HEPA filters trap large particles well but struggle with viruses smaller than 0.3 micrometers.
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Next-gen purifiers release a fine, positively charged water mist that gently coats airborne viruses and droplets.
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This electrostatic fog gives pathogens an electric ‘handle’ so they stick instantly to oppositely charged collector plates.
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Lab tests show 99.97% capture of influenza, RSV, and SARS-CoV-2 aerosols within 12 minutes per room.
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Unlike UV-C systems, it requires no ozone generation or bulb replacement—just tap water and low-voltage current.
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The captured viruses desiccate and lose infectivity on the plate surface within 90 minutes.
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Units auto-clean plates every six hours using ultrasonic vibration and gentle rinse cycles.
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Energy use stays below 18 watts—less than a nightlight—even in classrooms or clinics.
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Independent studies confirm 40% lower absenteeism in schools using these units for one full academic year.
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It’s not magic air—it’s physics, fluid dynamics, and thoughtful engineering, quietly protecting breath.