At first , through the thermal analysis of chana sc6350 ac system , this paper clearly defines the main problems which need to be conquered emphatically . on the base , a series of test research on the optimizing disposition of the ac system has been done , and a large number of valuable data have been obtained , so that , the improving method of the ac system has been determined . in addition , the improving heat preservation measures have been researched comprehensively , by the ac environment imitating test , it was proved that these measures were very useful to strengthen the refrigerating effect and improve the riding comfort 本文首先通过对长安牌sc6350微型客车空调系统进行了有关的理论计算,找到了该车型空调系统存在的根本缺陷,明确了需重点解决的问题,在此基础上,进行了一系列的空调系统优化配置的试验研究,获得了大量有用的数据,确定了该车型空调系统的改进方案。此外,对整车的保温隔热措施进行了全方位的改进研究,通过环境模拟试验表明,这些改进措施对增强制冷降温能力、改善乘坐舒适性具有明显的效果。