| 摘要 |
<p>PROBLEM TO BE SOLVED: To detect the replacement/cleaning time of a filter of an air purifier for electrifying dust by high voltage electrodes wire and grounding electrodes to collect it. SOLUTION: In a frame body 1 provided with an air suction port 2 and an air diffuser 3, a filter mechanism 4 and an air blowoff fan 5 are installed. In a filter frame body 6 constituting the filter mechanism 4, grounding electrodes 7 having a U-shaped section and opened on the air blow off fan 5 side thereof, high voltage electrode wires 8 spread between the grounding electrodes 7, a filter 9 positioned on the air blowoff fan side 5 of the grounding electrodes 7 are installed. The grounding electrode 7 having a Ushaped section is provided with a permeation part 10 in the plane part thereof facing the next grounding electrode 7, and the next grounding electrode 7 is provided with a reflective surface 14 in the plane part thereof. Struts 11 installed between the grounding electrodes 7 and the filter 9 are located near the permeation parts 10. A light emitting element 12 and a light receiving element 13 fitted to each of the struts 11 are opposite to the reflecting surface 14 of the next grounding electrode 7 through the permeation part 10, and the replacement/cleaning time of the filter 9 is detected by the intensity of light of the light emitting element 12 which the light receiving element 13 receives.</p> |
