| 摘要 |
PROBLEM TO BE SOLVED: To prevent local temperature rise in a control panel and adhesion of dust to the interior of the control panel and thereby to keep electronic equipment in a good condition for lengthening its life. SOLUTION: This control panel is constituted as follows: cylindrical heat sinks 3 with transistor modules 4 mounted on their circumference are connected with a wind tunnel 8 at one end. Wind guide sections 11 are formed on the hear sinks 3 at the other end. Cooling wind is let into the control panel through intake ports 10, formed at the lower part of a door 10, by the revolution of a cooling fan 9, The cooling wind then rises then enters the heat sinks 3, goes through the wind tunnel 8, and is emitted out of an exhaust port 1a formed on the top of a body 1. |
