Does the circulating air pass through the air conditioner filter?

This is an interesting question, and it should be said that there will be a small amount of air coming in! I don't know what the owner wants to say!

If you don't turn on the air conditioner and want air to enter, you might as well open the window directly;

The difference between the external circulation and the internal circulation is that the external circulation can continuously provide fresh outside air to the car, but the cooling effect is slightly worse. The internal circulation is only to circulate the air in the car inside, and the refrigeration is faster!

Nowadays, many high-end cars will have both internal and external air conditioning filters.

1.Exterior air filter: in front of the passenger windshield in the engine compartment.

2.Internal air filter: in the front passenger glove box.

There are 3 types of cabin air filters.

1.Only external air conditioning filters: large particles, leaves and insects, together with small particles of dust, are directly filtered in the external air conditioning filter.

2.Only internal air conditioning filter: large particles, leaves and insects, etc., together with small particles of dust, are directly filtered in the internal air conditioning filter.

3.At the same time, there are two air conditioners: the outer air filter in the engine compartment filters out large particles, leaves, insects, etc., and then the inner air conditioning filter in the passenger glove box continues to filter small particles such as dust.

The air path during internal and external circulation.

1.Models with only external air conditioning filter: when the external circulation is opened, the air passes through the air conditioning filter. When the internal circulation is opened, the air is not filtered by the air conditioner.

2.Models with only internal air conditioning filter: when the external circulation is opened, the air passes through the air conditioning filter. When opening the internal circulation, looking at the vehicle design, most models have passed the air conditioning filter, and only a few models do not.

3.At the same time, there are two models of air conditioning filters inside and outside: open external circulation, and the air first passes through the external air conditioning filter, and then through the internal air conditioning filter. The internal circulation is open, and the air is only filtered through the internal air conditioner.

It is best to turn on the air conditioner in the car to turn on the internal and external circulation, for the following reasons:

The function of the external circulation is to supplement the fresh air in the vehicle and keep the dirty air out of the internal circulation; The airflow in the internal circulation circuit only comes from the vehicle, forming the air circulation inside the vehicle.

When turning on the air conditioner to adjust the temperature (cooling or heating), it is best to turn on the internal circulation, so that the temperature in the car can quickly reach the expected value, and the cooling and heating effects of the air conditioner will be better, and relatively energy-saving.

However, the internal circulation also has a disadvantage, that is, it does not accept the external air, especially in winter, if the internal circulation is used for a long time, the air in the car is not circulated for a long time, which will easily lead to the air in the car, and the driver will be very easy to get sleepy, so in this case, it is recommended to open the external circulation for a period of ventilation, and then use the internal circulation.

When should you use the inner loop and when should you use the outer loop?

External circulation - to supplement fresh air, internal circulation - to block dirty gases.

The external circulation state is to use the fan to suck the air outside the car into the car, that is to say, the air channel outside the car and the inside of the car are circulating, and the air from the fan comes from outside the car. Sometimes I feel that there is still wind when the fan is turned off, because the owner has set up the external circulation. When driving in a city congestion, the inside of the car is filled with tail odors, which are caused by the use of external circulation to inhale the exhaust fumes of cars on the road.

In all automotive air conditioning systems, whether in internal or external circulation mode, the air must pass through the air conditioning filter. Nowadays, when the car air conditioner is turned on, the default is the external circulation, and the internal circulation needs to be turned on manually. Some automatic air conditioners will automatically switch to the inner circulation when the temperature is quickly lowered and the temperature is hung in reverse gear, and when the set temperature is reached, it will automatically switch to the external circulation, which can collapse to ensure the freshness of the air in the car.

Before that, let's take a brief look at the general structure and principle of automotive air conditioning. Its principle, in fact, is very similar to ordinary household air conditioners, which are through the liquid circulation system composed of compressors, evaporators, and expansion valves, and continuously bring the heat of the air in the car to the outside of the car.

The difference is that the car air conditioner has two functions: external circulation and internal circulation, under the external circulation, the car air conditioner can suck in the outside air and supplement the fresh air in the car; The internal circulation is almost the same as the working principle of the general household air conditioner. However, when the external circulation is activated, the air outside the car will be sucked into the car, and foreign substances such as exhaust gases, dust, powder, and bacteria from the outside air will naturally be brought into the car.

Therefore, the car air conditioner must have a "screen door" to block the harmful substances in the air from the outside. Of course, the internal circulation is no exception, because the air inside the car is not guaranteed to be 100% clean.

Therefore, through such a "screen door", it is also necessary to filter out the dirt in the air in the car. This is the reason for the existence of air conditioning filters.

Photo by Wang Panpan1) @2019

In the vast majority of automotive air conditioning systems, whether in internal circulation mode or external circulation mode, the air has to pass through the air conditioning filter. There are only a very few models where the air passes through the air conditioning filter when it circulates externally, and does not go through the air conditioning filter when it circulates internally. The internal circulation is to let the air in the Bobi car circulate when it is closed.

The inner loop icon is a closed car with a circular arrow inside it. The outer circulation is to flow the air from the outside of the car into the car, and the icon is an unenclosed car, and there is an air arrow pointing to the inside of the car.

Internal circulation means that the air in the car is heated or cooled in the car and then sent back to the car; External circulation refers to the heating or cooling of air outside the vehicle and sending it into the vehicle, that is, gas exchange between the inside and outside of the vehicle.

Generally, when we are quick to match whether it is warm air or cold air, the first thing is to open the internal circulation, but the continuous internal circulation, although the temperature in the car has dropped, the carbon dioxide exhaled by the people in the car will increase, so it is best to adjust to the external circulation every 1 hour and change the air.

Photo by Wang Panpan1) @2019

In summer, whether Kaikong is an internal circulation or an external circulation, in fact, it is not an internal and external circulation that is divided according to the season, but the environment in your car should be comprehensively judged. For example, if your car is parked outside and the sky is full of dust, then after entering the car, choose to open the inner loop. Is this accurate?

Obviously, this is wrong. Cars

Internal circulation: The air intake is in the car, which simply means that the air outside the air cannot enter and the air inside the air cannot get out. The long circulation time in the air will affect the turbidity of the air and reduce the oxygen content, which will make people feel hot, cause fatigue and anxiety, and affect driving safety.

External circulation: The air intake is under the windshield wipers, where the windshield joins the hood, which simply means sucking in the air outside the empty car. The air conditioning external circulation can ensure the circulation of air inside the car, and is suitable for use in the outside of the car under the condition of good air environment.

The internal and external circulation adjustment of the car prompts empty:

1.If your car is exposed to the sun for a long time outside, the inside of the car is like a sauna, and it is best to open the external circulation to ventilate and dissipate heat after getting into the car, and open the windows and sunroof at the same time to speed up the heat dissipation. After 3-5 minutes, the temperature in the car is roughly balanced.

At this point, close the window, turn on the refrigeration, and change the air conditioning cycle to an internal cycle.

2.If the car is parked in the basement or in a cool environment, it is recommended to start the internal circulation first, which can quickly exert the effect of air conditioning, so that the temperature in the car can be lowered faster and the cooling effect is the best.

3.In the event of a traffic jam, the internal circulation should be turned on, otherwise the external circulation will suck the exhaust gas from the outside of the vehicle into the vehicle.

4.Whether it is cooling in summer or heating in winter, the vehicle-air switch will basically be turned on every once in a while to enable external circulation, so that the vehicle-air air and the outer burial boundary can be kept circulating.

Above: Function diagram of the car's empty button adjustment.

Do I need to turn on the internal circulation <> turn on the air conditioner? The best state of the air conditioner is to alternately change the internal circulation mode of the air conditioner and the external circulation mode of air conditioning and cleaning, which can not only achieve the best effect and effect of refrigeration, but also save energy and reduce emissions. Therefore, it is recommended to open it if necessary.

This answer is applicable to most of the air conditioning models of Gree, Midea, Haier, etc.

When the car is air-conditioned, the internal circulation must be filtered by the air-conditioning filter.

The cabin air filter and the air cleaner are two parts of a car, both of which are used to filter the air. The air conditioner filter is used to filter the air of the air conditioner, such as when the air conditioner is turned on or circulated, to filter dust and pollen. The air cleaner filters the air that enters the engine, as well as dust and particles, but the natural air that enters the engine.

The two are completely different, the air conditioning filter can be washed and blown by itself if it is dirty, and the area with large wind and sand can be changed once every 1-2 years. The air filter can only be replaced regularly during car maintenance, generally it is best to change it every 5,000 kilometers, and it must be replaced at most 10,000 kilometers, so as to better protect the car engine.

Is there an air conditioning filter in the car? There is not even a filter, and ordinary cars have a small intake resistance, and the air passes directly through the evaporator

Otherwise, the wind will come in from **.