| 摘要 |
PURPOSE: To effectively utilize the performance of fans for the cooling of dimming units by fitting the fans to the suction holes of the dimming units, and providing the second fans on the outflow holes of a dimming box. CONSTITUTION: Multiple fans 10 are fitted to the suction holes 8a of multiple dimming units 1 by fan fitting bodies. The fans 10 generate air streams guided into the dimming units 1 from the suction holes 8a of the dimming units 1 and discharged to the outside of the dimming units from multiple discharge holes 8b to suppress the temperature rises of the dimming units 1. Multiple second fans 16 are fitted to the outflow holes 18b at the upper section of a dimming box 17 to suppress the temperature rises of electric apparatuses other than the dimming units 1, and they introduce the outside air into the dimming box 17 to cool it and positively ventilate the inside air of the dimming box 17 with the outside air. A temperature rise due to the heating of dimming controllers 2 is suppressed, and reliability can be improved. |
