Answer Air purifiers belong to trademark category 11, specifically as follows: 1106 drying, ventilation, and air conditioning equipment (including heating and cooling room equipment) (1) Ventilation hood 110006, air deodorization device 110009, air cooling device 110010, air conditioner Filter 110011, air reheater 110012, air dryer 110013, air conditioning equipment 110014, air filtration equipment 110015, fan (air conditioning) 110065, air conditioner for vehicles 110079, heating device for vehicles 110081, smoke for chimney Channel 110093, flue 110093, chimney bellows 110094, dryer 110097, air conditioning device 110099, defroster for vehicles 110112, drying equipment 110117, gas purification device 110138, feed and forage drying equipment 110141, forage drying device 110141, air or ionization equipment for water treatment 110174, air purification equipment and machines 110207, drying equipment and equipment 110222, fans (air conditioning components) 110225, flue-cured cigarette machines 110228, ventilation equipment and equipment (air conditioning) 110233, ventilation equipment for vehicles (air Regulation) 110234, Laboratory vent hood 110244, Air sterilizer 110245, Vehicle window defrost heater 110250, Gas condenser (not machine part) 110294, Kitchen range hood 110314, Kitchen exhaust hood 110314, Personal Electric fan 110315, electric clothes dryer 110316, food organic matter dehydration device 110321, fabric steamer 110331 (2) Hair dryer 110095 ※ Hair dryer C110020 Note: 1. The products in each part of this similar group are not similar; 2 .The food organic matter dehydration device in part (1) of this similar group is only similar to drying equipment, dryers, drying devices and equipment, and blow-drying equipment and devices of the ninth edition and previous editions; 3. Electric clothes dryers are similar to 0724 products Similar; 4. Fabric steam hanger ironing machine is similar to 0808 irons for ironing wrinkles, flat irons and 9th edition and previous editions 0924 electric irons, hanging steam ironing machines. Trademark Category