雨天是开车的朋友们不喜欢的天气，雨天行车不仅路滑，而且视线也不好，驾驶室内起雾是让人讨厌的，驾驶室内中控台上的循环按钮可以这个问题，那么，下雨天到底是开外循环好还是内循环好呢？很多人可能都不知道吧，今天混凝土搅拌机小编就给大家介绍一下。

Rainy days are the least favorite weather for driving friends. Driving in rainy days is not only slippery, but also has poor vision. Fog in the cab is the most annoying. The cycle button on the center console in the cab can solve this problem. So, is it good to open the outer cycle or the inner cycle in rainy days? Many people may not know it. Today's small series of concrete mixer will introduce it to you.

搅拌车雨天行驶开内循环还是外循环？

Does the mixer drive in rainy days with internal circulation or external circulation?

下雨天气天冷的话搅拌车的挡风玻璃上全是雾，严重影响司机的视线，所以先使用外循环风，将风向调整吹风档，开外循环，可以把人呼出的蒸气排出车外，而外面的冷空气不容易凝结的。

In rainy weather and cold weather, the windshield of the mixer truck is full of fog, which seriously affects the driver's line of sight. Therefore, it is best to use the external circulation wind first, adjust the wind direction to the blowing gear, and turn on the external circulation, which can discharge the steam exhaled by people out of the car, while the cold air outside is not easy to condense.

一般在车窗关闭的情况下，内循环是在风机的作用下，车内的空气循环，由于关闭了外界空气进入的通道，外界的空气进不来，空气比较沉闷；外循环是车内空气循环时，循环系统打开了外界空气进入的通道，有外界空气进来，空气较为新鲜。常用的办法：刚进入车内开空调或热风时，为了使温度迅速达到要求，开内循环；达到温度要求后再开启外循环模式，以使空气新鲜舒适。家用车的密封性好，长期内循环对人体是有害的。

Generally, when the window is closed, the internal circulation is the air circulation in the vehicle under the action of the fan. Due to the closing of the access of the external air, the external air cannot enter, and the air is relatively dull; External circulation is the circulation of air inside the vehicle. When the circulation system opens the channel for external air to enter, there is external air coming in, and the air is relatively fresh. Common methods: when you just enter the car and turn on the air conditioner or hot air, in order to make the temperature meet the requirements quickly, turn on the internal circulation; After reaching the temperature requirements, turn on the external circulation mode to make the air fresh and comfortable. Household cars have good sealing performance, and long-term circulation is harmful to human body.

那么什么时候开外循环好什么时候开内循环好呢？

So when is it better to open the external circulation and when is it better to open the internal circulation?

1. 车外空气质量差，污染严重的情况下（尘土飞扬的道路、拥堵的路段行车、化工厂附近等有臭味或者异味的路段）用内循环可以避免外面较差空气进入车内。

1. When the air quality outside the vehicle is poor and the pollution is serious (dusty roads, congested road sections, road sections with odor or peculiar smell near the chemical plant, etc.), internal circulation can prevent the poor air outside from entering the vehicle.

2. 夏天驾驶搅拌车，为了使用空调快速降低车内温度，可以使用内循环。

2. When driving a mixer truck in summer, in order to use air conditioning to quickly reduce the temperature in the truck, internal circulation can be used.

3. 搅拌车在冬天使用内循环可以让车内更温暖。

3. The internal circulation of the mixer truck in winter can make the car warmer.

4、雨天驾驶搅拌车可以定期的开启外循环，使车内进入新鲜空气。

4. Driving the mixer truck in rainy days can regularly turn on the external circulation to bring fresh air into the car.

赚钱很重要，更重要，各位搅拌车车友在雨天行车一定要注意！

Making money is very important, and safety is more important. You mixer drivers must pay attention to safety when driving in rainy days!