空调温度控制系统设计毕业设计

空调温度控制系统设计

摘要

空调温度控制过去一直依赖温控电动阀，电动阀可与温控器配套使用，实现对供暖通风和空调系统中冷热水的开关控制。由于我国工业水质很多是含Ca2+、Mg2+、Coo2-等离子浓度很高的硬水，在温度变化的空调管道中极易结垢，造成电动阀早期即失效损坏。另外，人们还常采用三速风机盘管代替温控电动阀进行调温，它是通过手动开关调整风机的风速来实现调温，不能自动控温，这就不可避免的发生低负荷时出现温度超调而造成能源的浪费。

本次设计的空调温度控制系统中，首先通过温度传感器DS18B20对空气进行温度采集，将采集到的温度信号传输给单片机AT89C51，由单片机控制显示器，并比较采集温度与设定温度是否一致，然后驱动空调机的加热或降温程序对空气进行处理，从而模拟实现空调温度控制单元的工作情况。

关键词：空调温度控制系统；温控电动阀；单片机

Air-conditioning Temperature Control System Design

Abstract

Air-conditioning temperature control has been depended on electric valve, electric valve can be used with matching Thermostat realize heating ventilation and air conditioning systems in hot and cold water control switch. Because many of China's industrial water containing Ca2 +, Mg2 +, Coo2-such as the hard water ions in high concentrations in the temperature of the air-conditioning pipes vulnerable to scaling, resulting in the early stage of electrical failure damaged valve. In addition, it is also often used in place of three-speed fan coil thermostat temperature control for electric valve, which is adjusted by manually switch the fan speed to achieve the thermostat can not be automatic temperature control, which inevitably occurs when low-load temperature overshoot caused by the waste of energy.

The design of air-conditioning temperature control system, first of all through the temperature sensor DS18B20 collection of air temperature, the temperature will be collected to the single-chip signal transmission AT89C51, controlled by the single-chip display, and compare the collected temperature and set temperature is line, and then drive the heating or air conditioning to cool the air to deal with procedures, which simulate the temperature control unit for air conditioning work.

Key words:Air-conditioning temperature control system; Temperature-controlled electric valve; Single-chip

目录

摘要........................................................................................................................................ I Abstract ..................................................................................................................................... I I 第一章引言. (1)

1.1 前言 (1)

1.2 空调的工作原理 (1)

1.3 空调的发展史 (3)

1.4 空调的发展趋势 (4)

1.5 总结 (5)

第二章总体方案设计和选择 (6)

2.1 总体方案设计 (6)

2.1.1 方案一 (6)

2.1.2 方案二 (6)

2.1.3 方案三 (7)

2.2 总体方案选择及实现 (8)

第三章硬件设计 (9)

3.1 硬件各单元方案设计与选择 (9)

3.1.1 温度传感部分 (9)

3.1.2 数字显示部分 (10)

3.1.3 加热降温驱动控制电路 (11)

3.1.4 键盘输入部分 (12)

3.2 单元电路设计 (13)

3.2.1 温度采集电路 (13)