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          Control functions and principles of automatic air conditioning

          Control functions and principles of automatic air conditioning

          Automobile air conditioners have experienced two stages of development, manual air conditioners and automatic air conditioners. At present, automatic air conditioners controlled by microcomputers have appeared. The manual air conditioner can only run continuously according to the blower air temperature and blower speed set by the driver, while the automatic air conditioner detects the interior temperature, exterior temperature, solar radiation, etc. according to the temperature set by the driver. , Automatically adjust the air temperature of the blower and the speed of the blower to maintain the temperature in the car at the set temperature.

          In a microcomputer-controlled automatic air conditioner, each sensor independently transmits signals to the ECU of the air conditioner, and the ECU of the air conditioner recognizes these signals according to pre-programmed standards to independently control one or more actuators. The air conditioner ECU also has a self-diagnosis failure function.


          Diagram of automatic air conditioning system controlled by air conditioner ECU

          The air-conditioning ECU has functions such as temperature control, blower speed control, air intake control, air flow mode control (air output control), and compressor control. Like the automatic air conditioner controlled by the amplifier, its work is realized by operating the control lever or switch on the control panel of the heating device.



          Automatic air conditioning control panel diagram

          1 Temperature control switch or joystick

          Operate the temperature control switch or joystick to set the desired interior temperature

          2 AUTO switch

          When the AUTO switch is turned on, the automatic control system is started, and the operating state of the automatic control system is displayed by the indicator light. When this switch is turned on, the other two switches are operated to turn off the AUTO switch indicator, and only those switches that are turned on in the relevant mode are retained.

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          亚洲 欧美 图片 自拍 视频
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