A friend told Brother Miao that the headlights of his car were foggy. He asked me what caused the foggy headlights. Is there any way to solve it? Today Brother Miao is here to talk to you about the causes of fogging in car lights and some solutions.
First of all, the first point is what causes car lights to fog up? Most of the reasons why car lights fog up mainly come from the air. There is a lot of moisture in the air, and the moisture in the air is also related to the temperature. For example, when the weather is very hot, the air can hold more moisture; if the weather is cooler, the moisture in the air must be less than when the weather is hot, and the excess moisture will condense. to the headlights.
Secondly, the second reason why the fog lights fog up. Even when we turn on the headlights, we all know that the bulbs will heat up if they are turned on for a long time. The same goes for car lights. From the inside of the car lights to the outside, the temperature gradually decreases. That is to say, the temperature is higher near the car lights and not close to the lights. The temperature of the car lamp is relatively low. When the lamp contains thicker water vapor, the water vapor will be close to the car lamp, and the water will precipitate, and then condense on the wall of the light distribution mirror. This will The car lights are fogging up.
Also, after the car lights are exposed to the sun, some of the water inside the lights will evaporate, and then when it is saturated with the air inside, the lights will also become foggy. So what solution do we have? The solution is that we can first adjust the size, number and position of the vents, so that the water vapor can be discharged in a timely manner, and it can also effectively reduce the fogging of the car lights.
However, if the vent hole is made with holes and is not protected, some insects, impurities, and water will enter the lamp through the vent hole, which may affect the quality of the lamp. We can put desiccant inside the lamp. Putting desiccant inside the lamp is a relatively simple method, and its usage is very simple. Just put the desiccant inside the lamp, and then remember to change the desiccant regularly.
But this approach also has disadvantages, that is, it is troublesome to change it regularly, in case you forget it sometimes. Moreover, to replace the desiccant, you need to drill a hole under the rear shell of the car light, and the cover that blocks the hole needs to be opened easily, but this can easily lead to water intrusion, and the air tightness is not good. Another solution is to install a cooling fan inside the car light.
If a cooling fan is installed on the car light, the fan will start working after the car light is turned on. After the fan starts working, the hot air in the car light will be discharged to the outside, which can effectively maintain the air circulation in the car light. , and the function of this fan can be said to be better, but the structural requirements and cost of the lamp are relatively high, and it is generally used in more expensive cars.
