| 摘要 |
PURPOSE:To always maintain good operation for a malfunction in a push actuating type air conditioner by combining a single increase trend potentiometer and a selective switching resistor circuit with priority and controlling damper drive. CONSTITUTION:In a push type switch 11, priority is given to a switch 11-4 for selecting a defroster blow-off port, a switch 11-3 for selecting a heat blow-off port, a switch 11-2 for selecting a high level, and a switch 11-1 for selecting a vent blow-off port in ascending order. Therefore, even if double pressing is performed, a resistor circuit 13 has a resistance value at the time when only the switch with high priority is turned on. A damper motor drive circuit 15 performs the drive control of a motor 14 through comparator circuits 18 and 19 by applying the voltage determined by this resistance value and a single increase trend potentiometer 16 to a point (A). As a result of this structure, good operating conditions can always be held even if there occurs a malfunction. |
