| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of vapor condensation to the outer surfaces of a front guider and a rear guider of which a draft passage running from an air supply fan to an air outlet consists. SOLUTION: An auxiliary air supply fan 11 fixed on a rotary shaft 10a of a fan motor 10 is situated between an air supply fan 7 and the fan motor 10 and a fan case 12 is provided to cover the auxiliary supply fan 1. A first discharge port 17 and a second discharge port 18 are situated at the upper part of the front edge and the lower part of the rear edge of the air outlet. Heat generated in an electric accessory box 13 is discharged through the first and second discharge ports 17 and 18 by the auxiliary supply fan 11. |
