General air cleaning devices filter the air probably divided about the methods and procedures. 1, multiple filters —- prevent airborne dust and bacteria into the interior Multiple carbon filter effectively blocking dust germs, filtered air to ensure clean air into the room. 2, titanium antivirus —- degradation of indoor air pollution of formaldehyde, benzene and other organic poison gas Nano-titanium dioxide activated by the UV light, filtered air effective degradation of radioactive contamination of air, formaldehyde, benzene and other organic poison gas. 3, negative ions increase the indoor oxygen —- oxygen in the air to keep the right amount and content of stability Room air oxygen anion generator to ensure that the air entering the home to maintain a sufficient amount of oxygen, vitality, strengthen the air filter> 4, PTC ceramic heating —- heated indoor air to a comfortable temperature PTC ceramic heating plate into the interior of the new winter wind assisted preheated appropriately increase the indoor temperature to filter the air, so warm and comfortable home. 5. UV light sterilization —- potent kill airborne bacteria pandemic virus