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摘 要
本论文是用89C51型单片机对中央空调空气源热泵控制器进行的硬件电路设计。系统可分为电源电路、驱动电路、采集电路、保护电路和显示电路等部分。出于抗干扰及强弱电隔离等方面的考虑，对驱动电路、保护电路、采集电路，论文中进行了光耦隔离处理。对于单片机内部的干扰，文中设置了看门狗电路，随时准备引导单片机恢复正常的工作状态。对于工作电源中的尖峰波干扰，本设计中通过增加一定数量的电容、电感器件进行削弱。系统中的处理信号为温度，而温度信号具有缓变性，所以采用串行的方式即可满足采集、显示等部分的电路设计，这种设计同时为单片机节省了大量的可用端口。由于编程的需要必须进行内存空间的拓展。端口数量的限制决定了只能采用串行的方式。为了满足和计算机之间的通讯，我们采用了RS485这种高质量的通讯方式。通过对控制器各个模块的独立设计，达到了对整个空调系统的控制。
关键词:中央空调、热泵、供应链管理、串行通信
Abstract
This thesis is used for central air conditioning type 89C51 microcontroller air source . System can be divided into power supply circuit, drive circuit, acquisition circuit, protect circuit and
display circuit. Strong anti-interference and electrical isolation from the aspects of driving circuit, and protect circuit, acquisition circuit, the thesis conducted light-coupler isolation. For internal interference, the chip set watch-dog circuit chip, ready to resume normal work guide. The peak work power for the design and by increasing the amount of capacitance and inductance components to weaken. The signal processing system for temperature and temperature signal , so using serial manner can satisfy collection, such as part of the circuit design, such as chip design can save them a lot of usable port .Due to the needs of programming to extend the memory space .Limits on the number of ports determines the serial manner. In order to satisfy the communication between computer and, we adopt RS485 this mode .Through the controller design, the independent modules to the air conditioning system of the control.
Key words: central air conditioning, pump, SCM, serial communication
目 录
第1章 绪论 ....