There are more foggy weather in winter, especially in the morning when the fog is very serious. At this time, you need to turn on your car headlights to illuminate the road ahead. But when turning on car headlights, many car owners will encounter the situation where the headlights "fog", so how can they illuminate the road ahead. So why do car headlights "fog"? Today I will introduce to you the reasons why car headlights fog up and how to solve them.
There are two reasons why car headlights "fog". The first reason is that water has entered the headlights. Some car lights have poor sealing effect and are not completely sealed. When the car lights are working, they will generate a lot of heat, so the internal temperature of the car lights will also rise. There is a rubber tube on the back side of the car lights that is connected to the air. Car lights are cooled. When encountering rain or snow, a large amount of water mist will enter the car lights through this rubber tube, causing the car lights to fog up. Also when washing the car, some water may enter the interior of the car lights through the rubber tube.
Another reason why the headlights "fog" is that there is a ventilation hole on the headlight assembly to prevent dust. When the headlights are turned on, they will generate a lot of heat, and the air inside the lampshade will heat up accordingly. At this time, the inside of the lampshade will The air pressure is higher than the air pressure outside, so it will escape through the vent. But when the headlights are turned off, the temperature inside the lampshade drops and the air pressure is lower than the outside air pressure. At this time, outside air will be absorbed through the vents. If it encounters rain or snow, water vapor will enter the headlights. When the car is started, the headlights will It will fog up. But this is a normal physical phenomenon, so don’t worry.
After understanding the reasons why car headlights fog up, let’s talk about which parts of car headlights are more likely to get “fogged”. There are two parts of car headlights that are easier for "fog" to take advantage of. One part is the bonding point between the lampshade and the lamp holder, because if the adhesive is not applied to the joint between the lampshade and the lamp holder during bonding, Evenly, then water vapor is likely to take advantage of the gap. Another part is the waterproof cover or waterproof cap. If these two places are damaged, water vapor will also take advantage of it.
So how to solve the problem of car headlight fogging? If the fogging is caused by normal physical phenomena, as long as you turn on the headlights every day, the fog will dissipate in about a week. If fogging is caused by water ingress, we should first open the car lamp cover to dry it. After the fog is removed, we should find the air leakage, that is, the place where the sealing is not tight, and then re-seal it. If it is not sealed properly, water will still enter the car headlights next time, and it will fog up when driving.
Do you now know how to remove the fog from the headlights? If the car lights become foggy, you must defog them in time. Especially in foggy weather, car headlights are very important.
