汉腾X5冬季前挡风玻璃起雾，开AC键还是开天窗？点开了解答案
推荐回答（2个）
冬季，驾车的时候经常会在前挡风玻璃处出现雾气，很多司机就会打开AC键来除雾气，但是天冷再吹冷风那岂不是“凉凉”？有司机选择开窗，天气好还行，下雨下雪怎么办？
其实起雾的原因有两个，一是湿度过高，二是温度过低。通常，在雨天、冷天的时候会出现起雾现象。
如果遇到下雨下雪的时候，车内外温度相差较大，前挡风玻璃很容易有雾气出现，这个时候不要开启AC键，也不需要开启车窗，毕竟外边的雾霾这么大。只需要将暖风的出风方向调整到吹前挡风玻璃，几分钟就可以轻松去除雾气。
暖风和冷风的原理是不一样的。暖风是发动机散热形成的，发动机舱的风扇将冷却系统收集的热量吹到车内。所以，这属于废物利用，即便不开暖风，这些热量也会被排到车外。所以冬天开暖风不会增加任何油耗。
启动就立刻开暖风，这种做法是不正确的。因为刚刚启动的汽车，水箱的温度还比较低，打开暖风不仅不利于车内温度的提升，反而给引擎增加了负担，导致引擎升温变慢。那什么时候开暖风最合适？当水温指针到达中间位置的时候，就可以使用暖风，建议先使用外循环，将车内的冷气排出，过3-5分钟再转为内循环。
最后很重要的一点就是无论是因为湿度原因还是温度原因一定要切换为外循环而不是内循环，内循环只会导致挡风玻璃雾气越来越重，驾驶有危险。
特别提醒：长时间停车要关闭暖风，很多司机喜欢开着暖风等人或者休息。但这样很危险，很容易一氧化碳中毒，尤其是开着暖风在车内睡觉，这是非常危险的行为！建议司机如若长时间开暖风，可以将车窗稍微露一条细缝，这样既能保暖又不会一氧化碳中毒。
挡风玻璃起雾的原因是由于室内和室外温差较大引起。如果在行驶过程中，驾驶环境较复杂的话，可以采用开冷风的方式进行，这样的好处在于可以快速的去除挡风玻璃上的雾气，避免因起雾导致无法看清道路情况。但因为冬天需要室内温度较高，在去除雾气后，应分多次将温度调节到暖风位置，防止雾气再次产生。如处于停车阶段或刚热车阶段的话，可以直接采用吹暖风的方式，这样的做法虽然雾气去除的时间相对较慢，但暖风应一直处于开启状态的话，必要时开启前风挡除霜功能。这样雾气不会再次产生，也符合室内驾驶员的温度需求。
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