Air conditioning system and method for disinfection of public facilities

An air conditioning system for disinfection of a public facility, comprising:

• an air conditioning equipment installed in a public facility structure;
• at least one air supply vent through which air is introduced from the air conditioning equipment to interior space of the public facility;
• at least one air inlet through which air is exhausted from the interior space of the public facility to the air conditioning equipment;
• a plasma filter unit installed in at least one of the air supply vent and the air inlet to collect particulate contaminants in air and sterilize or inactivate bio-aerosols with plasma;
• and
• a catalyst unit installed in at least one of the air supply vent and the air inlet to remove gaseous contaminants and ozone in air;
• wherein the air supply vent and the air inlet are installed in each of at least one separate room of the public facility,
• wherein the plasma filter unit comprises a plasma generator and a filter unit,
• the plasma generator including a ground electrode, a high-voltage electrode, and a porous ceramic dielectric interposed between the ground electrode and the high-voltage electrode to generate atmospheric-pressure low-temperature plasma by dielectric barrier discharge, the porous ceramic dielectric comprising at least one of alumina (Al2O3), zirconia (ZrO2), diatomaceous earth, and silica (SiO2), wherein the plasma generator further comprising an antibacterial coating layer coated on the porous ceramic dielectric,
• wherein the plasma filter unit and the catalyst unit are integrally installed together in at least one of the air supply vent and the air inlet of each separate room;
• wherein, when the plasma filter unit and the catalyst unit are integrally installed together in the air supply vent, the catalyst unit and the plasma filter unit are sequentially arranged in order with respect to the air-supply direction such that particulate contaminants in the air are collected and bio-aerosols are sterilized or inactivated before the air flows into the separate room, and residual ozone and gaseous contaminants generated from the plasma generator are prevented from entering the indoor space of the separate room,
• wherein, when the plasma filter unit and the catalyst unit are integrally installed together in the air inlet, the plasma filter unit and the catalyst unit are sequentially arranged in order with respect to the air-intake direction such that particulate contaminants in contaminated air of the separate room are collected and bio-aerosols are sterilized or inactivated by the plasma filter unit, thereby preventing particulate contaminants and bio-aerosols from entering an air-conditioning duct, and residual ozone and gaseous contaminants generated from the plasma generator are prevented from entering the air-conditioning duct, and
• wherein the plasma filter unit installed in at least one of the air supply vent and air inlet is periodically or continuously operated to periodically or continuously sterilize or inactivate bio-aerosols collected in the plasma filter unit.