| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for an outdoor unit of an air conditioner having superior economical characteristic and productivity a high dust-proof reliability. SOLUTION: A printed circuit board 11 is arranged in vertical orientation, and a high impedance circuit to be mounted on the printed circuit board 11 is arranged at one surface. It is covered by a casing 16 having ventilation holes 14 facing at a side where the high impedance circuit is not arranged, thereby it faces the direction in which powder dust drop naturally, and so accumulation of dusts onto the printed circuit board 11 is reduced. In addition, another face where the high impedance circuit is arranged shows high air resistance, infiltration of dust is reduced and its surface where the high impedance circuit is not arranged is constituted only with a low impedance circuit, so that even if the dust adheres to a charging part and a leakage current flows on the surface, it becomes a very small value due to an impedance ratio, so the dust-proof characteristic can be increased. |
