| 摘要 |
PROBLEM TO BE SOLVED: To provide an air cleaner to keep freshness of indoor air by a method wherein a ventilation function, such as cleaning introduction of outside air and direct exhaust of indoor air are provided in addition to cleaning circulation of indoor air is provided, and the operation described above are switched or used jointly. SOLUTION: A positive pressure part 7 and a negative pressure part 8 are formed at the internal part of a casing 5 arranged through a wall 4 to partition outside air 2 and the interior of a room 3 from each other, and an air supply fan 9 is arranged. The positive pressure part 7 is provided with a clean air outlet 10 opened to the interior of a room, a main filter 11, and an exhaust port 12 opened to outside air. The negative pressure part 8 is provided with an indoor air suction port 16, an outside air suction port 17, and prefilters 18 and 18. The air flow passage on the delivery side of the air supply fan 9 is switched to the indoor side and the outside air side by a damper 15, and an air flow passage on the suction side is switched to the indoor side and the outside air side by a slide damper 23. |
