Car headlights are very important for driving safety. They not only illuminate the road ahead for us, but also serve as warning lights. If the headlights fog up, the light transmittance of the headlights will be reduced, the lighting effect will be greatly reduced, and the service life of the headlights will also be affected. Why do headlights fog up, and how can we solve the problem of headlight fogging?
Whether it is an ordinary halogen headlight, a xenon headlight, or a headlight with an LED light set, there is a ventilation rubber tube on the back cover. The headlight will generate a large amount of heat at the moment it is lit and during use, and the function of the breather pipe is to discharge this heat out of the headlight as quickly as possible, thereby maintaining the normal operating temperature of the headlight and ensuring the stability of the headlight.
During the rainy season, heavy rain or winter, when the headlights go out and the temperature inside the lamp unit drops, water molecules in the air can easily enter the cavity of the lamp unit through the rubber vent pipe or vent hole. When the temperature inside the headlight cavity is unbalanced and the temperature difference between the inside and outside of the lampshade is too large, water molecules in the humid air will gather from high-temperature places to low-temperature places, increasing the humidity in these parts, and then condensation on the surface of the inner lampshade. , forming fog. Generally speaking, these fogs will be concentrated in the lower half of the headlights.
You don’t have to worry too much if the car lights become foggy due to differences in ambient temperature. After the car lights are turned on for a period of time, the fog will be discharged out of the lights through the ventilator along with the hot air. This will basically not damage the headlights and electrical circuits. It should be noted that you must not bake the headlights. Doing so can easily damage the headlights. Because the exterior of the headlights are made of plastic, the extra heat can easily bake the lampshades, and most of this damage is irreparable. of.
There is also a situation like the water mist generated after the vehicle is waded into water or the car is washed. Since the engine and exhaust system themselves are relatively large heat sources after the vehicle is waded into water, rainwater will form a large amount of water vapor, which will flow along the ventilation system. Air pipe, some water vapor will enter the headlight. Car washing is more straightforward. Some car owners like to use high-pressure water guns to flush the engine compartment. After flushing, the water in the engine compartment is not dealt with in time. After the engine compartment cover is closed, the water vapor cannot be quickly dispersed outside the car, which is stuffy. Moisture in the engine compartment may enter the headlight.
Usually when fogging occurs, as long as the headlights are used normally, it will completely dissipate in about a week. If it is particularly severe, you can open the back cover of the waterproof cover of the headlights, turn on the headlights, and let the xenon lamp dry the fog inside. , then cover it with the waterproof cover after cooling and it will be fine. If water has entered, it is generally difficult to repair, and the headlight assembly needs to be replaced to completely solve the problem.
Fogging of car lights is affected by many factors. In addition to manufacturers providing better quality headlights at the source, all car owners should also develop a good habit of regularly checking the headlights and check whether the headlight cover is damaged or damaged. If there are cracks, grasp the fogging situation of the headlights in a timely manner and make reasonable treatment methods to keep your car always with a pair of bright eyes! If the source of the article is changed, the infringement will be deleted.
