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1、1毕业设计（论文）任务书课题名称： 汽车空调系统设计 系 别： 汽车工程系 专业班级： 车辆工程082 姓 名： 学 号： 指 导 教 师： 教研室主任： 系常务副主任： 二一一 年 十一 月 二十二 摘 要汽车空调系统是实现对车厢内空气进行制冷、加热、换气和空气净化的装置。它可以为乘车人员提供舒适的乘车环境，降低驾驶员的疲劳强度，提高行车安全。空调装置已成为衡量汽车功能是否齐全的标志之一。汽车空调的作用已是众所周知。汽车空调装置已不再是豪华奢侈的象征，不仅轿车、客车上采用空调，货车、工程车上也纷纷安装空调装置。人们对空调的需求越来越迫切，对汽车空调质量的要求也越来越高。近几年来，国内公路大量
2、新建，尤其是高速公路迅速发展，有力地带动了公路客运事业特别是高速客运事业的迅猛发展。同时，随着地球表面日益变暖和人民生活水平的提高，促进城市公交开始采用空调客车，这两方面因素造成对客车空调器的需求大增。由于客车车型基本上都是国内自行开发的，其空调系统需国内客车厂和空调器厂自行设计、配套，所以汽车制造厂、空调器制造厂及空调器维修站迫切需要了解汽车空调的有关知识。 伴随汽车空调的普及与发展，汽车空调的发展大体上历经了五个阶段：单一取暖阶段、单一冷气阶段、冷暖一体化阶段、自动控制阶段、计算机控制阶段。空调的控制方法也历经了由简单到复杂，在由复杂到简单的过程，作为汽车空调系统的电路控制方面也在不断更新
3、改进。关键词:汽车空调 故障诊断 维修 注意事项AbstractAutomotive air conditioning system is the realization to the inside of the train air for refrigeration, heating, ventilation and air purification devices. It can provide comfortable for a ride by bus driver of the environment, reduces the fatigue strength, improve the
4、 driving safety. Air conditioning unit has become a car is all ready function to measure one of the marks. The role of automotive air conditioning is well known. Automotive air conditioning unit is no longer a luxury, not only the symbol of cars, buses, trucks, the air conditioning engineering insta
5、llation of air-conditioning equipment in the car. People of the air conditioning needs more and more urgent, to the requirements of the quality of the automotive air conditioning more and more is also high. In recent years, the domestic highway, especially a new highway rapid development, effectivel
6、y drive the highway passenger transport business, especially the rapid development of high speed passenger transport business. At the same time, with the surface of the earth is warming and the improvement of peoples living standard, promote the city bus began to USES air conditioning coaches, the t
7、wo factors of air conditioner fuelled by the demand for passenger cars. Due to the passenger cars were largely developed by the domestic, and the air conditioning system should be domestic car factory and air conditioner factory to design, form a complete set, so the car manufacturers, air condition
8、er manufacturers and the urgent need to understand automobile air conditioner pit on the knowledge of air conditioning. Along with the development and popularization of automotive air conditioner, air condition in the development through five stages: a single heating stage, a single air conditioning
9、 phase, the changes in temperature and integration phase, automatic control stage, computer control stage. Air conditioning control method also after from simple to complex, from simple to complex in the process, as the air conditioning system of the car circuit control are constantly updated improv
10、ement. Keywords: Automotive air conditioning Fault Diagnosis Maintenance Note 目录摘要Abstract第1章 绪 论第2章 方案论证2.1 汽车安装空调的提出2.2 汽车空调的特点2.3 汽车空调的组成2.3.1汽车空调压缩机的选用2.3.2蒸发器的选用2.3.3冷凝器的选用2.3.4节流膨胀机构2.3.5其他部件2.4 货车空调制冷剂的选择2.5 初步方案第3章 货车空调系统的设计及计算.3.1 确定空调制冷量.3.1.1工况条件的确定3.1.2制冷量的确定3.2压缩机的选配3.2.1循环状态参数的确定3.2.2循
11、环热力计算3.2.3压缩机选配3.3 膨胀阀的选择3.4 蒸发器的设计计算3.4.1工况参数确定3.4.2初步规划3.4.3干工况和湿工况下空气侧表面传热系数的计算 3.4.4计算析湿系数与湿工况下空气侧表面传热系数 3.4.5初步估算迎风面积和总传热面积 3.4.6计算制冷剂侧表面传热系数3.4.7计算总传热系数和传热面积.3.4.8计算空气侧阻力损失3.5 冷凝器设计计算3.5.1工况参数确定3.5.2结构初步规划3.5.3空气侧表面传热系数计算3.5.4制冷剂侧表面传热系数3.5.5冷凝器长度计算3.5.6校核空气流量3.5.7计算空气侧阻力损失3.6 汽车空调电子控制系统的设计3.6.1汽车空调的压力控制系统3.6.2安全保护系统 3.6.3温度控制系统3.6.4风机控制系统3.6.4.1冷凝器风机继电器3.6.4.2蒸发器风机转速控制器第4章 程序的设计4.1 压缩机的选配4.2蒸发器的计算4.3冷凝器的计算结 论
