年用空气调节设备(以下简称空调设备)是使驾驶员和乘车人员有一个较舒适的环境,减轻疲劳,确保行车安全的一种设备,一些发达国家,对车用空调器的研究比较重视,发展的也较快。据资料介绍,美国早在1925年,汽车上就安装了温水式加热装置和风挡玻璃的除霜(雾)装置。1936年又首先把制冷装置用到大轿车上,数年后又用到小轿车上。1953年以后,在小轿车上得到普遍使用,1973年新车制冷机装车率达70％。日 Annual air-conditioning equipment (hereinafter referred to as air-conditioning equipment) is a kind of equipment that makes drivers and passengers have a more comfortable environment, reduces fatigue and ensures driving safety. Some developed countries pay more attention to the research of air-conditioners for vehicles. The development is also faster. According to information, as early as 1925, the United States installed defrosting (fog) devices for warm water heaters and windshields. In 1936, the refrigeration unit was first used in large cars, and it was used in small cars several years later. After 1953, it was widely used in cars. In 1973, the loading rate of new car chillers reached 70%. day