A car air-conditioning air door automatic controller, including electrical and electronic components of mechanical power drive structure, which is characterized in that the mechanical structure including the position feedback signal potentiometer W1 and No. 3 middle gear linkage (6), when the No. 3 middle gear (6) rotates, the position feedback signal when the control signal change. When is high, the motor (1) reverse drive worm (2), worm gear (3) and No. 1 middle gear (4), No. 2 middle gear (5), No. 3 middle gear (6) inversion, automatically open the valve; when the potentiometer from L terminal sliding to the H side, the motor (1) stop, automatic positioning valve; when the control signal is low, the motor (1) is driven by a worm, worm gear (2), (3), No. 1 middle gear (4), No. 2 middle gear (5), No. 3 middle gear (6) is to automatically close the throttle, namely automatic positioning valve; the electronic component includes a printed circuit board in the controller and is mounted on a printed circuit board integrated block, conductive plate, diodes, resistors, carbon film potentiometer, the circuit is the 24V input voltage, power supply by the filter regulator as the comparator and motor drive chip and other components; the control signal by dividing the filtered input integrated block LM7803 3 feet, 6 feet, the position feedback signal filtered by the divider, input to the integrated block LM7803 5 feet, 2 feet, an integrated block LM7803 by comparing the input signal from the 7. 1 feet 2 feet, the output control signals, the signals are input to the driving circuit TI D89D 2 feet and 4 feet, according to TI D89D The signal of 2 feet and 4 foot from the TI D89D D3 pin and 5 pin output motor reversing signal, the drive motor rotates positively or reversely through the arc conductive plate, the motor rotates to drive the rotor rotation variable resistor, a variable resistance value change, this signal is the position feedback signal input to LM7803 5 feet and 2 feet; through the reasonable choice on the pressure resistance, the LM7803 in the low frequency variable resistor, respectively from 2 feet and 1 feet and the output signal, so that the motor can rotate, which drives the gear reversing, you can open or close the door; and because the carbon film potentiometer L H client and the radian of 90 DEG, the No. 3 middle gear (6) rotation angle is 90 degrees; therefore the motor with 3 intermediate gear (6) to the 90 DEG position Can automatically stop rotating, that is, positioning.
【技术实现步骤摘要】
本技术涉及汽车空调风门控制器，特别涉及一种汽车空调风门自动控制器。图2是附图说明图1中所示的A-A剖视图。图3是本技术的控制电路图。图中1、电机2、蜗杆3、蜗轮4、1号中间齿轮5、2号中间齿轮6、3号中间齿轮7、印刷电路板8、导电板3 9、导电电刷10、电位器碳膜条11、电位器电刷12、正极接线柱13、负极接线柱14、印刷电路板B点15、印刷电路板R点16、GND 17、CNT 18、IGN19、导电板2 20、导电板1 当控制信号端CNT17悬空时，LM7803的5脚电压＞6脚高电平，9脚低电平，U2从13脚输出低电平，2脚输出高电平，电机通过导电板19、导电板8、D7构成回路，电机正转，带动电位器电刷从H端滑向L端；当电位器转动到L端时，LM7803的6脚电压＞5脚电压，7脚输出低电平，2脚电压＞3脚电压，1脚输出低电平，即TI-D89D的6脚，9脚为低电平，TI-D89D的2脚、13脚均输出低电平，电机停转，实现了自动复位功能。权利要求1.一种汽车空调风门自动控制器，包括电动力驱动的机械结构和电子元件，其特征在于，所述机械结构包括位置反馈信号电位器W1与3号中间齿轮(6)联动，当3号中间齿轮(6)转动时，位置反馈信号随之改变，当控制信号为高电平时，电机(1)反转，带动蜗杆(2)、蜗轮(3)、1号中间齿轮(4)、2号中间齿轮(5)、3号中间齿轮(6)反转，自动打开风门；当电位器从L端滑动到H端时，电机(1)停转，风门自动定位；当控制信号为低电平时，电机(1)正转，带动蜗杆(2)、蜗轮(3)、1号中间齿轮(4)、2号中间齿轮(5)、3号中间齿轮...
【技术保护点】
【技术特征摘要】
【专利技术属性】
技术研发人员：余建均，
申请(专利权)人：富阳恒泰五金电器有限公司，
类型：实用新型
国别省市：
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