| 摘要 |
PROBLEM TO BE SOLVED: To provide the cooling device of a control box, whose fin parts formed in its main case are cooled effectively to lower its inside temperature and eliminate a cooler and a fan. SOLUTION: Fin parts 9 with unevelss forms are formed on a ceiling wall and sidewalls. The fin part 9 comprises single fin units 10 connected to each other continuously, and each fin unit 10 has a temperature converting part 11 and a brim part 12. Pinwheels 20 are attached to the outer surface of the fin part 9 in the respective recessed grooves 9a near both the ends in the longitudinal directions. Each pinwheel 20 has a drum-shaped blade support 21, a plurality of blades 22 attached to the blade support 21 and a support shaft 23, which rotatably supports the blade support 21. |
