The difference and treatment method of fogging and water entering car headlights in winter

Many drivers encounter water flooding from the headlights, which looks like the car is crying, as if aggrieved.

What exactly is going on here?

Let's analyze it together.

Heat is emitted when the headlights are lit and illuminated, so structurally speaking, there is an air vent at the rear of the headlights, which can be used to exhaust the heat emitted by the headlights. Ensure the normal working temperature of the headlights.

  This phenomenon is particularly obvious in the autumn and winter seasons, or in summer and autumn with heavy rain. In fact, the moisture in the air enters the headlight and attaches to the lampshade through the ventilation holes. Because the outside air temperature is low, but the temperature inside the headlights is very high, it is prone to temperature differences and generate water vapor.

  How to tell if the lights are fogging or getting water?

The appearance of fogging of the headlights and entering water is different. If you want to determine whether the headlights are getting water or fogging, there is a way to make a preliminary judgment, which is to check the traces of the water flow. Fogging is generally a layer of film or dew on the surface of the lampshade, without traces of water flow. And because of the large amount of water, the dew drops condensed from the headlight to the headlight, which will cause obvious water traces. Similar to a waterfall, even if the water is dry, there will be some traces, like a snail passing by There will be traces.

Of course, if you want to make a judgment, many car owners are very confused, there may be wrong judgments, and there is another method. After the fog inside the lamp appears, it takes about 1 to 1.5 hours to completely eliminate the fog when it is turned on. When it is stationary, it is stored for 24 to 36 hours in a dry environment with humidity <50%. Can be completely and automatically eliminated, this phenomenon is fogging. If a large area of ​​fog condenses on the inner wall of the lens and condenses into water droplets, which accumulates inside the lamp, when the lamp is used for a long time and many times, as the temperature increases, the fog will adhere to the inner surface of the light distribution lens in a large area. This phenomenon should be judged as water ingress.

The impact of fogging and flooding of the headlights on the vehicle is very large. In addition to affecting the night driving safety, there may also be problems with vehicle lines due to excessive water inflow, which cannot be ignored. Especially in summer and winter, when water and gas are abundant, it is necessary to develop a good habit of regularly checking the headlights of vehicles.