汽车空调系统设计说明书(共41页).doc

精选优质文档-----倾情为你奉上专心---专注---专业毕业设计（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： 二〇一一 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 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 installation 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, effectively 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 two 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 conditioner 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 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 improvement. 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………。