To prevent fogging in the car, is it to open the outer circulation or the inner circulation?

In winter, the car defogging can open the external circulation to heat the car air conditioning system, which is relatively slow, and the whole process takes more than 10 minutes to achieve good results. When the outside air quality is very low, the internal circulation system of the vehicle should be turned on, the purpose of which is to prevent the outside air from entering the car and reduce the air quality inside the car. Or when the vehicle air conditioner is running, it is very necessary to let the cold air of the vehicle circulate in the car, and the internal circulation and external circulation are alternately carried out to reduce the working time of the compressor and reduce the fuel consumption of the vehicle.

The internal and external circulation on the car air conditioning panel can be switched off by a direct operation switch and can be switched at any time without any influence. The external circulation mode of the automobile air conditioning system is to suck the air outside the car into the air conditioning compressor, and then blow it into the car after being compressed by the air conditioning compressor. In most cases, when the air environment outside the car is good, the car air-outside circulation mode can turn the dull air in the car into fresh air and keep the air circulating.

The fog in the car is not very large, you can open a gap on both sides of the window to let the air convection, so that the temperature difference between the inside and outside air increases, so that the fog slowly disperses.

In rainy days, the external circulation should be opened, and the external circulation in the car can be fully circulated and exchanged with the air outside the car. In addition to inhibiting the formation of fog, in rainy days, impurities and dust in the air are also greatly reduced, and opening the external circulation can allow passengers in the car to breathe more fresh air, which is beneficial to health. Car owners can buy a special anti-fog agent online, you can spray the anti-fog agent on the glass, and wipe it with a towel after the anti-fogging agent has condensed, so that a transparent protective film is produced on the glass, and generally speaking, the window will not fog up within half a month.

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External circulation should be opened as this prevents the car from fogging up and it also prevents the temperature inside the car from getting too high, and it also prevents a person from feeling stuffy while driving.

It is better to open the external circulation, because when the external circulation is opened, there can be a very good air circulation in the car, and the people sitting in the car are also more comfortable.

It is necessary to open the external circulation, which can quickly remove the fog and keep the air in the car circulating, and people are not easy to get dizzy.

Open external circulation.

Fogging in the car, the main reason is that there is a temperature difference between the inside of the vehicle and the outside of the vehicle, the air condenses into small water droplets attached to the glass, if the temperature in the car is higher than the temperature outside the car, the car will fog up, like driving in winter, the vehicle is very easy to fog in the car, if the temperature outside the car is higher than the temperature in the car, the outside of the car will fog up.

Correct way to do it:

1. In the rainy weather in summer, the window fogs, turn on the external circulation of the air conditioner, turn on the air conditioner A C switch, turn on the air conditioning defogging function, adjust the air output of the air conditioner to the maximum, blow for a few minutes and it will be defogged clean, and it will not be heated during driving, although the defogging effect is relatively slow, but it is better to be completely clean;

2. If it rains in autumn and the front windshield is foggy, you can directly turn on the air conditioner to blow the wind, and the natural wind will not cold you or freeze yourself.

3. In winter, the window fogs up, turn on the internal circulation of the air conditioner, turn on the air conditioning outlet directly to the maximum, and turn on the warm air normally, although the defogging effect is a little slow, but the effect is better, at least you don't need to blow the cold wind to make yourself suffer.

The exterior of the car is fogged up.

The reason for the external fogging of the car is the opposite of the inside, the external fogging of the car often appears when the temperature outside the car is high, the inside of the car is low, and the air humidity outside the car is high, so it can be simply understood as the dog days in summer, rain, the air outside the car is hot and humid, and the inside of the car is cold because of air conditioning, so that the humid air outside the car touches the cold glass, and the condensation layer of water droplets, which is the so-called external fogging;

For this external fogging is very simple, the front windshield can be scraped off directly with a wiper, and the glass on both sides can be lifted and lowered once, and it can also be cleaned; So fogging on the outside of the car is easier to solve than fogging on the inside!

With the improvement of people's living standards, private cars have become a must-have thing for almost every family, after all, buying a car is not a big deal now, pay a part of the down payment, and then pay a few thousand yuan a month to have. With a private car, it is very convenient to travel. But buying a car is buying a car, and if you don't know some car knowledge, driving may not only bring you convenience, but also add trouble to you.

For example, when driving in winter, the front windshield in the car is often covered with a layer of water mist, because the water mist is in the car, so there is no way to solve the wiper, do not deal with it, seriously affect the line of sight, may lead to traffic accidents. Deal with it, if you can't operate, you can only wipe it with a towel, but this only treats the symptoms but not the root cause, and there will be water mist after a while, and when you wipe it with a towel, it may also cause traffic accidents because it blocks the driver's vision. So what should drivers do to prevent fogging in the car?

Next, the author will give you the answer to this question in popular science.

1. What will be mist in the car If you want to completely solve a problem, then you must first analyze the cause of the problem. To solve the problem of water mist in the car, it is necessary to find out the essential cause of this phenomenon. Water mist in the car is essentially a liquefaction phenomenon, that is, the water vapor in the car encounters something with a low temperature and becomes a liquid.

This phenomenon mainly occurs in winter, because in winter, the outside temperature is very low, and the temperature of the front windshield will naturally be very low. At this time, after people get on the bus, especially when there are 5 people sitting in the car at once, everyone will breathe, and one of the breath they exhale will be water vapor, and the temperature is about the same as the body temperature. At this time, the water vapor meets the cold front windshield and naturally changes from gaseous to liquid, so fogging in the car occurs.

2. How to solve the problem of fogging in the carAnyone who has driven a car knows that the first thing to do when encountering fogging in the car is to turn on the air conditioner and then turn on the hot air. Some people may ask, if the hot air is turned on in the car, the temperature in the car will be higher, and the fogging phenomenon should be more serious when the water vapor in the car meets the cold front windshield. Don't worry, there's a follow-up!

After turning on the air conditioner, the second thing you need to do is to change the air inside the car to dry air, and the fogging phenomenon will naturally disappear if there is less or no water vapor. At this time, we need to open the external circulation, because the external circulation is to change the dry air from the outside of the car into the car. The air outside the car in the north is easier to understand in winter, and the air humidity outside the car in the south is relatively high in winter, but because the air conditioning is turned on in the car, the fogging problem in the car can still be easily solved.

Finally, if you can't distinguish between internal circulation and external circulation, the author will share with you a common way, that is, turn on the air conditioner to turn on the hot air, and let the hot air blow on the front windshield, in this way, it is equivalent to heating the front windshield, in this way, the fogging problem will be transferred to the outside of the car, and then it will be solved with a wiper brush.

Outer circulation.

When driving in winter, if the vehicle is parked outside, as soon as the owner gets into the car, the exterior of the vehicle is frosty, and the interior is foggy, in this case, there are two solutions. One is to turn on the AC to turn on the cold air and switch to the outer circulation, the fog inside the vehicle will be removed, but the frost on the windshield of the vehicle cannot be removed, and the owner can only get out of the car and use the anal device to remove the frost on the outside of the vehicle. In addition to opening the cold air circulation, the owner can also open the warm air internal circulation, this method can have an immediate effect, the use of the engine water temperature to produce warm air, directly dry the water vapor on the vehicle glass, but the engine water temperature rises takes time, and the defogging effect is relatively slow.

The correct way should be to open the external circulation, so that the phenomenon of fogging can be effectively avoided. And even if the fog is fogged, it can be defogged through the internal circulation.

To prevent fogging in the car, the physical internal and external circulation of the air conditioner can be turned on, and this circulation system has automatic air replacement, and does not generate additional fuel consumption, which is convenient and affordable.

When the windows fog up, is it cold or warm? Inner or outer circulation? This time I understand it thoroughly.

The correct way to prevent fogging in the car is to turn on the air conditioner defogging function, or open the window a little.

If the humidity is relatively high and the weather is foggy, then you need to open the internal circulation.

In winter, when the temperature is very low, you can use air conditioning and warm air for defogging, start the vehicle and preheat it for a few minutes, and then turn on the air conditioner and adjust it to the warm air, adjust the air outlet to the highest, and then select the defogging block at the air outlet, turn on the defogging mode, and the air conditioning warm air can dry the fog. Turn on the external circulation mode when removing fogging, and switch to internal circulation after a few minutes when the fog disappears, this defogging method is more thorough, especially suitable for cold weather, but there are also some drawbacks.

Generally speaking, when the car glass is fogged, the external circulation mode of the air conditioning system should be turned on to suck the air outside the vehicle into the car to reduce the temperature difference between the inside and outside of the car, so as to eliminate the fog on the car glass.

As of August 2019, the air conditioning system of the cars on the market includes the internal circulation mode and the external circulation mode, and their working principles are different, which are explained below.

1. Internal circulation mode:

The internal circulation mode of the automobile air conditioning system is to suck the air inside the car into the air conditioning compressor, compress it by the air conditioning compressor and then blow it into the car. Generally speaking, the internal circulation mode of the car air conditioner is used in the case of poor air environment outside the car, which can not only prevent the polluting gas from outside the car from being sucked into the car, but also flow the air inside the car to avoid a dull air environment in the car.

2. External circulation mode:

The external circulation mode of the automobile air conditioning system is to suck the air from the outside of the car into the air conditioning compressor, compress it by the air conditioning compressor and then blow it into the car. Generally speaking, the external circulation mode of the car air conditioner is used when the air environment outside the car is good, which can replace the dull air in the car with fresh air to keep the air flowing.

When you encounter fogging during driving, why do you need to turn on AC without air conditioning to prevent fogging of the vehicle's glass External circulation makes the temperature in the car lower Don't use warm air to blow the car when it fogs.

Automobile defogging and external circulation mode: When the car glass is fogged, the external circulation mode of the air conditioning system should be turned on to suck the air outside the vehicle into the car, reduce the temperature difference between the inside and outside of the car, and thus eliminate the fog on the glass.

The car is open and circulated in addition to fogging.

1. Preheat the engine in winter.

When the temperature is low in winter, it becomes difficult to start the car when it is parked for a long time. This is because the vaporization rate of the fuel decreases, and the mixture becomes thinner and less flammable; At the same time, the viscosity of the engine oil increases, and the engine running resistance increases; The chemical reaction of the battery electrolyte is slow, resulting in insufficient power output at start-up, insufficient engine power, and insufficient ignition voltage. So, the car should be warmed up with the engine before starting!

2. Adjusting the external circulation can remove fogging.

In winter, most riders have encountered the phenomenon of glass fogging. The defogging method is very simple, as long as you turn on the air conditioner, adjust it to the external circulation mode, and adjust the air outlet to the defogging mode. It should be reminded that it is best to replace the air conditioner filter before winter, and if necessary, clean the air conditioning duct.

Because the air conditioner filter is too dirty or has been circulating for a long time, the wind blowing out will have a musty smell, and it will carry a large number of germs, which will affect the health of the respiratory tract.

3. Car insurance should be bought.

In order to save a little money, some people always want to insure a few types of insurance, or only insure car damage insurance, but not third-party liability insurance; Or only the main insurance, not the additional insurance, etc. In fact, each type of insurance has its own insurance liability, if the vehicle really has an accident, the insurance company can only bear the insurance liability according to the original insurance contract to pay, and some other losses of the car owner may not be compensated.

4. Don't forget to turn signals when overtaking.

When you need to overtake, be sure to observe the direction and distance of the car behind and in front of you, and when you are preparing to overtake, don't forget to dial the turn signal of the steering wheel, and don't be careless because you're in a hurry. Security is often between the raise of a hand.

First, use the external circulation, select the air conditioner, and wait for about 5 minutes at the front windshield of the hot air, and then choose to switch the internal circulation or directly turn off the heating function of the air conditioner, and the defogging effect is faster.

Because the formation of fog in the car is mainly caused by the high humidity in the car, and at the same time there is a relatively large temperature difference between the inside and outside of the car, so as long as the window is slightly opened to let the air flow, eliminate the temperature difference between the inside and outside, and the fog can be dispersed after a period of time.

When you encounter fogging during driving, why do you need to turn on AC without air conditioning to prevent fogging of the vehicle's glass External circulation makes the temperature in the car lower Don't use warm air to blow the car when it fogs.