As far as the overall structure of the headlight is concerned, no matter it is an ordinary halogen headlight, an argon headlight, or a headlight with an LED light group, there is a ventilating rubber tube on the back cover position, and when the headlight is lit, there is a ventilation rubber tube Instantaneously and even the headlights will generate a lot of heat when they are in use. The function of the vent pipe is to discharge the heat out of the headlights as much as possible to maintain the normal working temperature of the headlights and ensure the stable use of the headlights.
Causes of headlight fogging
Moisture in the air will enter the headlight through the vent pipe and adhere to the lampshade. As the water vapor gathers, water droplets will flow down the lampshade. This situation is mostly caused by large temperature differences, and it is most likely to occur in winter and rainy seasons. After the lights are turned on for a period of time, the fog will be discharged out of the lights through the vent pipe along with the heat, which will basically not damage the headlights and electrical circuits. In this situation, drivers should not act rashly. For example, never bake the headlights. If the operation is not done properly, it will easily damage the headlights.
In addition to changes in the weather, human factors can also cause car lights to turn into "tear eyes", such as wading, car washing, etc. When the vehicle is wading, since the engine and the exhaust system themselves are relatively large heat sources, a large amount of water vapor will be formed when rainwater drenches on them, and part of the water vapor will enter the headlights along the ventilation pipe. And car washing is more straightforward. Some car owners like to use high-pressure water guns to rinse the engine compartment. After flushing, the accumulated water in the engine compartment is not dealt with in time. After the engine compartment cover is closed, the water vapor cannot be released to the outside of the car quickly, and the water vapor stuffed in the engine compartment may enter the interior of the headlights.
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