| 摘要 |
PURPOSE:To improve a ventilating efficiency by reducing maintenance and inspection operations and maintain a stable operation of an electrical apparatus by automatically adjusting temperature within a box. CONSTITUTION:A electrical apparatus is held within a box 21 having ventilating vents consisting of a suction vent 25 and a discharge vent 29. A heating element 32 for generating an upward airflow through the discharge vent 29 is installed in the proximity of the discharge vent 29 of the box 21. Also, the heating element 32 is driven by a temperature detector 33 for detecting a temperature of an air within the box 21. |
