| 摘要 |
PROBLEM TO BE SOLVED: To minimize the adverse effect of the electric noise in a circuit with high current and high voltage on a circuit with low voltage and low current, by dividing a control board into the first printed wiring board of a strong electric circuit and the second printed wiring board of a weak electric system circuit, and by centrally mounting one of the divided control board on the other control board at a perpendicular angle. SOLUTION: To an electric part casing 1 with a suction opening 2 that sucks in outdoor air opened, of an air conditioner, the first printed wiring board 3, which also serves as a cover to close the same casing 1, is mounted, and only a circuit with high voltage and high current comprising a strong electric circuit of the control board for inverted control is mounted on this. The second printed wiring board 4 is continuously provided independently from the control board of the first printed wiring board 3, and only a circuit with low current and voltage comprising a weak electric circuit is mounted on this. This second printed wiring board 4 is fixed to roughly the middle position of the first printed wiring board 3 by a transmitter 5 in a perpendicular direction to this wiring board 3. Heat generating parts are mounted to the face and back of the second printed wiring board 4, and they can dissipate heat by draft. |
