Whenever it rains or snows.
"Fog" has become a more difficult enemy for old drivers to solve
If you're not careful, it's easy to get into an accident.
There are about 500,000 traffic accidents in China every year.
The death toll is more than about 100,000.
And among themOne of the most important causes of car accidents
That's it"Fogging of glass".
Many veteran drivers think that they are skilled, and they do not hesitate to take out the towels they have prepared long ago after encountering fogging of the car windows, and wipe the glass with a towel while holding the steering wheel, and at the same time have to carefully observe whether there is a surveillance camera to photograph themselvesIf you're not careful, your life will be put into it!
The cause of glass fogging is generally understood as "water vapor condensation and pre-cooling", but the reason is not so simple. The "fog" of glass is naturally also water droplets, but most of the car glass is hydrophobic glass, and its concept is already as the name suggests.
The air humidity is high, and opening the doors and windows causes "moisture" to enter the car.
Water droplets suspended in the air inside the car come into contact with the windows as the air flows through the car.
Water-repellent glass can only form a "bead" of water, but it cannot isolate it.
The above three steps are the first cause of fogging of car windows, to put it bluntly, the "moist air" brings in the water, so that the water comes into contact with the glass and becomes fog.
So, the real concept of pre-condensation is: temperature difference!
The air becomes foggy because of excessive humidity, and the main reason for fogging the windows on rainy days is "wet", but why do they also fog up in the dry winter? The reason is precisely the [temperature difference].
Before the humidity of the air reaches 100%, the water vapor it carries is gaseous-water vapor, and this water vapor will inevitably condense into water when it encounters a low temperature object, which is a very natural physical phenomenon. Before the car starts, the temperature and humidity inside and outside the car are basically the same, including the temperature of the body will be as low as the ambient temperature, so there is generally no fogging at this time.
In winter, the car is always warmed by turning on the warm air, which not only makes people feel warm, but also heats the air. The higher the temperature of the air, the stronger the ability to carry water molecules, and the popular explanation is that the humidity of the air is getting higher and greater; The driver always has to breathe in the car, and each exhaled air contains a lot of water vapor, so the air in the car will gradually become "fog and moisture".
Knowledge Points:The air temperature inside the car rises, but the outside of the car is very cold, especially the cold air in the driving will continue to cool the surrounding windows, the temperature is enough to reach the standard of "condensate vapor", which is the reason why the windows will also fog up when driving in a dry environment in winter.
1. Strictly control the speed
Due to the low visibility in rainy and foggy days, the driver will not be able to see the vehicle and road conditions in front of him clearly, and driving at low speed can help to take necessary measures in case of emergencies.
When driving on the expressway, in case of rain and fog, it is recommended to stop and rest in the nearest service area, or exit the expressway from the nearest toll booth, and wait for the weather to improve before continuing the trip.
2. Strictly prevent sudden braking
Rainy and foggy days are often the road is more slippery, at this time do not slam on the brakes, one is easy to "deviate" the vehicle, the other is the foggy low visibility, slamming on the brakes is easy to make the car behind the rear-end cause accidents.
If you need to brake, you can slowly relax the throttle first, and then gently press the brake several times in a row to achieve the purpose of controlling the speed of the vehicle and prevent the occurrence of rear-end accidents.
3. Don't hit the steering wheel in a hurry
In rainy and foggy days, the road surface is relatively slippery, and it will be more difficult to control when the car is driving.
If you need to turn, it is recommended to reduce your speed, turn slowly, and then return to normal speed after passing. In addition, if you can't see the opposite curve when turning, honk your horn to warn oncoming traffic to pay attention.
4. After parking, the occupants stay away from the car
If you feel too foggy and want to stop and wait for the fog to clear before hitting the road, you can park your car next to the side of the road and turn on the fog lights, low beams and double bounce lights. The most important thing is that after parking, everyone should get off the right side of the car and get as far away from the road as possible.
Miss by a mile! Fogging of the car window if it is not dealt with in time during driving.
It is very easy to cause uncontrollable traffic accidents.
Incident One:The windows of the car are fogged up to wipe and hit the flyer
In early December 2018, in Suzhou, Jiangsu Province, a car drove through a zebra crossing without the slightest sign of slowing down or avoiding, and directly knocked a pedestrian who was crossing the zebra crossing into the air, causing him a head injury. ▼
Accident 2:Wipe the windows of the car without observing the road conditions and injure the pedestrian
On January 5, 2018, an almost identical accident occurred in Taizhou, Jiangsu Province: a woman drove across a zebra crossing and knocked three pedestrians into the air, causing two of them to suffer a fracture and a minor brain **.
There are actually many ways to remove fog, but the effect is different.
It is more convenient to open windows for ventilation, but it is not suitable for rainy days and winters
Method: Open a slit in the side window to speed up the convection in the car.
Reduce the temperature difference between the inside and outside of the car to achieve the effect of defogging.
Wipe the glass with a dry towel, the effect is fast, but the fog recurs
As mentioned earlier, this method is prone to accidents.
Turn on the air conditioner, the defogging effect is good, but it increases the load on the engine
Turning on the air conditioner is also a common way to remove fog.
The speed of cold air defogging is fast and the effect is good.
But in the cold winter, the cold wind is not suitable for a long time.
If you use warm air to remove the fog, the fog will be more severe at first.
Wait until the temperature of the whole piece of glass rises before the fog slowly disappears.
But to use warm air to remove fog, then be sure to turn on the AC switch.
Based on research by the Swiss Federal Materials Science and Technology Laboratory.
The higher the temperature, the higher the humidity.
The greater the impact of the car air conditioner on fuel consumption.
What we've just said is "fogging and then defogging".
In fact, a better option is to prevent the windows from fogging up in advance.
There are often some folk remedies among car enthusiasts.
For example: dish soap, soap, toothpaste, etc.
We tested them all one by one today.
And add a special glass anti-fogging agent for comparison.
We marked 4 zones on the windows.
Apply a magic weapon to prevent fogging to different areas.
Judging from the comparison of the effect after construction.
There is a noticeable blur in the area where the toothpaste is applied.
There is no noticeable difference in the other regions.
Measured effect
Dish soap works well, but it doesn't last.
The anti-fogging effect of dish soap is average, but the durability is relatively poor.
Dish soap will initially form a water-soluble film on the glass, and with the increase of water droplets, this film will gradually be diluted and lose its effect, and it needs to be re-constructed, which is more cumbersome for car owners.
Toothpaste is more cumbersome to apply.
The anti-fogging effect of toothpaste is good, because toothpaste contains trace amounts of fluorine, and the chemical reaction between fluoride and water will repel the water film.
However, toothpaste is more viscous, and the construction is more time-consuming and laborious. On the other hand, toothpaste contains a lot of abrasive particles, which will slowly wear down the glass surface with long-term use.
Liquid soap only has a cleaning effect and does not help in any way to prevent fogging.
The soap itself contains cleaning ingredients that have a cleaning effect on the glass surface, but it has no effect on anti-fogging.
Use lights properly.
When driving in foggy weather, turn on the fog lights, marker lights or low beam lights in time, and turn on the hazard warning flashing lights if you are driving on the highway or when the fog is very thick. Remember not to use high and low beams, because the high beams shine upwards, and the light emitted is diffusely reflected by the fog, which will form a white expanse in front of the car, and you will not be able to see anything when driving.
Keep your speed low.
When driving in the fog, you must strictly abide by the speed limit and do not drive fast. The greater the fog and the shorter the viewing distance, the lower the speed needs to be. When visibility is less than 50 meters in dense fog, the speed should not exceed 20 kilometers per hour, and you should leave the highway as soon as possible from the nearest exit.
Don't overtake blindly.
If you notice a vehicle parked on the right in front of you, don't blindly overtake because it's likely waiting for oncoming traffic to pass. When overtaking a vehicle parked on the side of the road, after confirming that there is no intention to start and there is no oncoming vehicle, honk your horn at the right time and bypass at a low speed on the left.
Do not slam on the brakes.
In foggy weather, it is impossible to distinguish the distance between vehicles, and if you apply the brakes urgently, the car behind you will not be able to judge the distance, resulting in a rear-end collision. If you need to slow down, you should relax the throttle slowly and press the brake continuously to prevent collisions, scrapes and rear-end collisions.
In case of emergency, turn on the hazard warning flashing lights and set up warning signs.
In the event of a traffic accident in foggy weather, a warning sign should be set up behind the vehicle and the vehicle's hazard warning flashing lights should be turned on to alert the vehicle behind. After the warning, the personnel in the car should immediately withdraw to a safe place, and at the same time call the police, do not stay in the car or walk on the lane to avoid secondary accidents.
The vehicle turns on the defogging function.
In autumn and winter, once there is fog, the car is also prone to fog, so it is necessary to turn on the rear window defogging and rearview mirror defogging function, and the air outlet is facing the front windshield to avoid fog affecting the driving vision.
If visibility is too low, stop and wait for the fog to clear.
When visibility is less than 10 meters, drive to a roadside safety zone or parking lot and wait for visibility to improve before hitting the road.
Winter is coming, and the bad weather will gradually increase.
When driving in foggy weather, please "reduce speed, control distance, and light tail".
Don't neglect safety just because you're in a hurry.
Is there anything better we can do in the face of fog?
I grabbed the steering wheel for 8 years to know that I don't need to turn on the air conditioner to fog the windows.
Many novices can choose to turn on the air conditioner if there is a tendency to form fog in the car during driving. It can also reduce the temperature in the car, reduce the temperature difference between the inside and outside of the window, prevent the moisture in the car from condensing, and can avoid fogging.
At this time, you can also open the external circulation, but it is only suitable for relatively dry weather, if it is like the southern winter, although the temperature is low, but the air humidity is high, the effect may not be very good.
The advantage of this mode is that it has a quick effect and obvious effect, and it is more suitable for intermittent use than opening a window to control the temperature of refrigeration and the size of the cold air. However, it should be noted that if the air quality is too poor on a hazy day, then do not open the external circulation.
Teach you a "trick" to easily defog, that is, prepare this kind of car windshield anti-fogging**, just spray and wipe on the laminated glass to produce a protective film to avoid fogging of the laminated glass. And the effect is very long-lasting, spraying once can continue for 90 days without fogging, is it particularly convenient. Make your car safer!
However, there are a lot of such window defoggers on the market, and they are a mixed bag, and buying counterfeit products does not necessarily work well. Different anti-fogging agents can bring completely different effects.
Today, I would like to introduce to you a defogging artifact - Weipo WIPER automotive glass anti-fog spray.
It is guaranteed that there is no fogging, and the trouble of fogging the car window can be solved with one spray.
Wiper is a well-known brand with hundreds of stores in Asia.
It also has its own R&D centers in China, Japan and South Korea, and has become one of the sales giants of daily necessities in Asia with its strong professionalism and high-quality products.
This anti-fog spray can eliminate fog with a real spray, and it will definitely not fog repeatedly, and one spray can effectively prevent fogging for 3 months.
At the same time, the side windows and rearview mirrors can be used to avoid fogging and affecting the driving vision, and the effect is absolutely visible
We do this through field experiments.
To test its anti-fogging effect, spray the anti-fog agent on the windshield of the car, and then spray high-temperature water mist on the sprayed mirror, we can clearly see the contrast.
We use a more stark contrast, in the process of driving, half of the mirror surface is with a thick layer of fog, and the other half of the mirror surface is the use of Wiper anti-fog spray, and there is no fog at all.
Science and technology nano protective film, completely eliminate fogging.
The powerful anti-fog effect of Wiper anti-fog spray is due to the use of the most advanced nanotechnology in the United States, when the car glass is sprayed with anti-fog spray, it will form a nano layer on the surface of the glass, and when the hot and humid air in the car meets the clear water layer, it will form a flat water curtain, and the light will not refract through the water curtain.
In addition to preventing fogging of the windshield, this technology also acts as a deflector to prevent the refraction of bright light, which can be weakened and blocked by the harsh sunlight during the day, the high beams of vehicles at night, and the refraction of strong light sources.
While preventing fogging, it will not hurt the glass of the car, nor will it hurt the film of the car.
In addition to its anti-fogging effect, there is also a strong rainproof effect, using the principle of lotus leaf effect, between the interface between glass and water, to establish a long-lasting hydrophobic layer, so that the water gathers into water droplets, quickly slides down, forming a very good water repellent effect.
We sprayed half of the windshield sides with Waipo Auto Glass Anti-Fog Spray.
Then splashed water on the windshield.
You can see the side that sprayed the water.
The water quickly condenses into droplets and slides down without forming a curtain of water.
Light rain can be completely without wipers, and there will be no water curtain during heavy rain, so you don't have to worry about driving safety in rainy days, an absolute artifact in rainy days.
It is not completely restricted to the use of vehicle glass, the vanity mirror in the bathroom at home will form a water mist after taking a bath, which is very inconvenient.
Also in the winter time.
As we go from indoors to outdoors, or from outdoors to indoors, our glasses often fog up.
You can also spray a little deter car glass anti-fogging agent.
It is also very effective in avoiding fogging.
It is suitable for all mirror anti-fogging, it can be used on various occasions, and it is used this autumn and winter, refusing to fog.
* Affordable, safe and harmless, the content of a bottle in 100ml can meet 10 cars, a car, a bottle can be used for several years, the effect is very significant after spraying, no matter how large the temperature difference is not to worry about fogging.
Bring a safety guarantee to your driving, in addition to your own use, you can also send parents, lovers, relatives and friends, not only a gift, but also a kind of care and a responsibility to the family.
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