Is there fog on the glass in the car, whether it is open to internal circulation or external circula

At present, automobiles include two cycle modes, internal circulation and external circulation, and the working principle of the two is completely different.

The principle of internal circulation:

The air intake of the internal circulation of the car is in the car, which means that the outside air cannot come in, and the air inside cannot get out. The air circulating in the internal circulation is turbid for a long time, and the oxygen content drops, which will make people feel hot and dry, and produce symptoms such as fatigue and anxiety, which will affect driving safety. Compared with the external circulation, the inner circulation has the biggest advantage, that is, the cooling effect is stronger!

The energy consumption of the car will be lower! Because when the weather is hot, the outside air is very hot. When the external circulation is turned on, the air conditioner needs to consume a lot of power to cool the outside hot air, so not only the cooling effect is poor, but also the energy consumption is low.

The principle of the outer circulation:

Using the external circulation, you can breathe the fresh air outside the car, driving at high speed, after a long time, you feel that the air in the car is turbid, people are uncomfortable, and you can't open the window, you should use the external circulation to get some fresh air in; In winter, if the heater feels too hot, you can turn off the fan and turn on the external circulation, which not only maintains the temperature in the car, but also has fresh air, which will feel more comfortable.

Through the principle analysis, we can know that if you want to completely make the car free of fog, then you should choose to turn on the air conditioner and choose hot air to blow the windshield. Similarly, use the external circulation first, select the hot air of the air conditioner and the front windshield exit, wait for about 5 minutes, and then choose to switch to the internal circulation, or turn it off directly. Of course, with the heating function of air conditioning, the defogging effect will be faster and better.

Use the heating of the air conditioner to blow the windshield, and the heating will dry the water molecules in front of the windshield, and the defogging effect will be better.

In the rainy days in summer, the external circulation and refrigeration system should be turned on to remove the fog, which is the fastest way to solve the fogging of the car window, and it will take about ten seconds to remove the fog. If you turn on the hot air of the air conditioner in winter and start the internal circulation, this method is relatively slow, and it generally takes more than ten minutes to dry the fog to achieve the effect of defogging.

Outer circulation. Because the fog can be removed quickly, the outer circulation should be opened.

After turning on the defogging function, the fog on the front windshield did not decrease, but increased instantly. After the fog on the front windshield increases in the external circulation mode, the fog slowly dissipates. If the air is very dry, no matter how large the temperature difference is, it will not fog up, if the water vapor in the air is very large, there will be no temperature difference, it will not fog up, but because the outside temperature is very low, the air temperature in the car is relatively high, and the water vapor content in the rainy air is very high, so it will cause the inside of the windshield to fog.

Of course, it is to open the external circulation, so that this problem can be better solved and the fog can be avoided from becoming more serious.

In such a situation, you should choose external circulation, because in this way you can blow away the fog in the car and blow the fog off the glass.

If fog appears on the interior glass of the car, it is usually advisable to turn on the internal circulation. Because the internal circulation allows the air in the car to circulate and circulate, without allowing humid air from the outside to enter the car, thus reducing water vapor condensation on the glass. If the external circulation is turned on, it will allow moist air to enter the car, increasing the humidity in the car, causing more water vapor to condense on the glass.

However, if the air pollution in the car is serious and the time to open the inner circulation is too long, it will also affect the health of passengers, so it is recommended to properly open the external circulation for ventilation.

When the temperature is relatively low, the owner will close all the windows when driving, and it will not be long before there will be a layer of fog on the windows. This is because the temperature of the car glass is low when it is in contact with the outside world, and the temperature inside the car is relatively high, and the water vapor in the air forms a layer of fog on the inside of the window glass when it comes into contact with the lower temperature. If it is not removed in time, it will block the driver's view and bring danger to driving.

Traditional method: In the process of driving, one of the most common methods used by many car owners is to wipe the fog on the windshield with a rag while driving to maintain a clear line of sight. But people can't use one mind for two purposes.

If the owner is driving alone, using this method to remove fog, and to drive, and to wipe the fog, the attention will definitely be distracted, can not focus on the road conditions, driving safety is difficult to guarantee. If the owner is a novice, the risk factor is even greater.

There is a simple and convenient way for young people to use, the formation of fog in the car is mainly due to 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 after a period of time can disperse the fog. However, although this method is convenient and easy, but the cold sky window is a kind of "test" for both drivers and passengers, and it is recommended that car owners should exercise well before adopting this method, or be prepared to prevent colds.

If you're afraid of the cold but willing to spend money, there's a way for you. In the car supply store and car beauty market, there are many special car glass defogging agents that can effectively prevent fogging in the car. Its usage is to first scrub the inside of the windshield clean, and then spray this kind of defogging agent on it, after 1-2 minutes to dry, and then wipe it clean with a dry towel.

In this way, a transparent protective film will be formed on the glass, which can effectively prevent water vapor from condensing on the glass to form a fog layer, and generally spraying can prevent fogging for about 5 to 7 days. If it is too expensive, the owner can also use local materials and make it himself. The method is very simple, that is, mix the dishwashing detergent with water in a ratio of about 1 10, and then dip it in a soft cloth and apply it to the inside of the window windshield and the mirror surface of the rearview mirror, and then wipe the glass with a dry cloth after drying.

You can also apply a thin layer of glycerin, alcohol or salt water to the windshield as an anti-fogging agent to prevent the inside of the windshield from fogging up in the short term.

In autumn and winter, when we are driving, there is some fog on the glass in the car, which is very annoying, we can turn on the warm air in the process of driving, and then use the external circulation to blow the wind. It's going to blow off soon.

If there is fog on the glass in the car, the internal circulation should be opened under normal circumstances, so as to achieve a very ideal ventilation effect, effectively purify the air in the car, and make the vehicle safer in the process of driving.

In this case, it is best to open the external circulation, just blow directly on the windshield, and it will soon be able to remove the fog.

Circulate it, when it comes to winter, there are many such things.

When the glass fogs up, it should circulate outside. When fog is found on the windshield, the fastest and fastest way is to adjust the empty air outlet to the front windshield first, turn on the empty air conditioning function, with external circulation, the fog on the glass can be quickly "blown off" with the maximum air volume in about ten seconds. If you want your car to be completely fog-free, you should choose an air and a hot air windshield.

Similarly, use the external circulation first, select the air conditioning hot air and the front windshield air outlet, wait for about 5 minutes, and then choose to switch to the internal circulation, or close it directly. Of course, with the air-heat modulation function, the defogging effect will be faster and better. The principle is to use warm air to dry the water vapor molecules in front of the windshield and circulate them to the outside of the car to prevent them from condensing on the glass and forming water droplets.

This method is slow to remove fogging, but the effect is indeed the best and most aggressive in rainy and snowy weather. When the humidity in the car is reduced and the air is dry, it is possible to keep the windows fog-free for a long time, and it is also suitable for the cold autumn, at least the interior of the car will be warm and pleasant. @2019

The fogging of the car glass opens the external circulation, introduces the air outside the vehicle into the car, reduces the temperature difference between the inside and outside of the car, and removes the fog on the glass. At the same time, you need to turn on the actual defogging button of the air conditioner, adjust the wind speed to the maximum, turn on the AC air conditioning switch, and adjust the temperature to the lowest, which can quickly defog. Car rearview mirrors are also prone to fogging on rainy days, and we can quickly remove fog and residual rain by containing resistance wires in the rearview mirrors, which can be heated.

Why does car glass fog up?

1. Glass fogging is more common in winter, and the temperature difference between the inside and outside of the car is large, and the temperature inside the car is higher than that outside the car, which will produce fog.

2. The temperature in the car is relatively high, the exhaled gas and sweat will evaporate, and the evaporated water vapor will form liquefaction when it encounters the glass with a relatively low temperature.

3. The humidity is relatively high on rainy days, and the soles of shoes are stained with water or rain on clothes during the process of opening and closing the door, which will aggravate the moisture in the car and cause the glass to fog up more easily.

The glass fogs up and circulates outside.

When you find that there is fog on the windshield, the fastest and fastest way is to adjust the air conditioning outlet to the front windshield, turn on the air conditioning refrigeration function, and then open the external circulation.

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.

How to remove fogging of glass

1. Defogging agent

When using, you only need to spray it evenly on the glass surface, and then wipe it clean with a dry towel to have an anti-fog effect. The principle is to use the method of surfactant to retain a certain protective film on the surface of the glass, change the surface tension of water molecules, and make the fog beads condense into large water droplets, so as not to block the line of sight.

2. Anti-fog towel

When fogging, wipe it with this towel and you will find that it is no longer fogging. The principle behind this magic towel is also very simple, in fact, it is to soak the anti-fog round luck agent in the towel, and the effect of the defogging agent is exactly the same.

3. Dish soap

The most economical way is to mix the defogging things yourself, take household dish soap and tap water, mix it in a ratio of 1:6, and then spray it evenly on the glass, and then gently wipe it clean with a towel.

When the glass fogs up, it should be circulated outside. There are generally two buttons for internal and external circulation ventilation in automobiles. One is a two-button inner loop, one is an outer loop, and one is a one-key loop.

Pressing the button is the internal circulation, and then pressing the indicator light is the internal circulation. The main purpose of the internal circulation is to prevent the dust and harmful gases from entering the car in a timely and effective manner. The following is an introduction to the internal and external circulation of automobiles:

The working principle of the external circulation is that the air outside the car is brought into the car by the fan, and the air inside the car is blown out of the car by the fan, so that the air can be exchanged without opening the window.

The principle of internal circulation is to let the air circulate in the car, especially in winter to turn on the heating, in the summer to turn on the air conditioner, to promote the air circulation in the empty car. In summer, when the air conditioner works with a compressor, you need to open the AC null button first, and then turn on the null button. Therefore, the fuel consumption of the air button is relatively high in summer.

When the null switch is turned on, the temperature inside the car is higher than the outside temperature, and then the front windshield fogs up. At this time, the external circulation should be turned on to achieve the defogging effect. In winter, the warm air of the car works by the heat generated when the engine is running, and the heat dissipation of the engine works by the water tank.