Winter is coming, and the temperature is very low. When we drive, the temperature inside the car is high, and the temperature outside the car is low, so it's easy to get a layer of fog in the car, which will affect our vision. So what should we do if there is fog in the car? How to solve the problem of fog in the car in winter? Here are some ways to learn!
Tips for demisting in cold weather
Novices can only turn on the air conditioner to remove fog
Most people have only one way to deal with the front windshield fogging: turn on the air conditioner and blow on the glass. But if you turn on the air conditioner again on a cold day, you will catch cold. This is not a long-term solution.
The author consulted a technician who has many years of automobile repair experience. He analyzed that the principle of window fogging is' internal heat and external cooling '. When the temperature difference between the inside and outside of the car is between 10 ℃ and 20 ℃, the carbon dioxide exhaled by the passengers in the car will condense into water vapor and condense on the window when they meet the cold glass. In winter, the window glass of the home is easy to produce water vapor, which is also the reason. This is an old problem, but it is not a small problem, because once the driving line of sight is blocked, an accident may occur within a few seconds. Therefore, demisting is essential.
Blowing the front windshield with cold air actually forms a "cold air film" on the surface of the glass to prevent carbon dioxide from condensing on the glass, so it can have a demisting effect. Of course, the 'negative effect' is that the temperature in the car drops and the passengers are exposed to the cold. In this regard, enthusiastic car owners contributed a lot of methods, the following several methods for rookies just on the road to learn.
Original method: wipe with dry cloth or paper towel
Disadvantages: laborious, unsafe, leaving marks after rubbing
The most original way is to wipe the glass directly with a dry cloth. Many passengers must have seen this kind of scene: the old drivers always have a towel to wipe the glass when they stop at the traffic lights. Although the method is primitive, many people use it, but it is relatively hard. After wiping, the glass will leave traces, and soon it will fog again. If you wipe while driving, it's easy to have an accident. A friend of mine once admitted that on the first rainy day after he picked up the car, he helped the driver's wife clean the glass like this. "But in the end, he scraped with other cars.".
The most economical way: blow with hot air
Advantages: no new energy consumption is added
Disadvantages: the effect is slow, and the rest of the windows are still foggy
The second method is to turn on the ventilator, adjust to the external circulation, align the air outlet with the front windshield, and blow directly with hot air. This method is to use the heat generated by the engine to remove the fog, without adding new energy consumption. But the effect of this method is relatively slow, and when the hot air is turned on, the fog on the front windshield is getting bigger and bigger. It will take about ten minutes for the glass to clear gradually. Therefore, it is suggested that the hot air should be turned on immediately after the car is warmed up. At the beginning, the hot air should be blown with a "high temperature" above 25 ℃. After the fog disappears, the temperature should be slowly lowered to about 22 ℃.
Another problem is that if hot air is used for demisting, the fog on the front windshield can be removed, but the fog on the door glass is not less. In this regard, the higher the strength of the analysis, ordinary hot air dehumidification function is not, just 'refers to which hit which'. As a matter of fact, the fog on the door glass can not be ignored. The rear-view mirror is used when reversing or changing lanes. Many rainy accidents are actually related to the fog on the side window glass, so it is necessary to wipe the side window glass manually when necessary.