Why does my car always have a bad smell at the air outlet every time I turn on the air conditioner?

Every time your car turns on the air conditioner, there will always be a bad smell at the air outlet, which means that there is a small problem with your car, I will carefully analyze the problems of your car from different aspects, and will definitely solve your problem, please don't worry.

Every time the car turns on the air conditioner, there will always be an unpleasant smell at the air outlet, the reason is certainly not unilateral, it must be due to a variety of reasons, the most important reason is: the refrigeration principle of the air conditioner is to quickly evaporate heat through the refrigerant, so that the air temperature drops rapidly. Due to the low temperature of the evaporator and the high air temperature, the water molecules in the air particles on the evaporator condense into water droplets, and the dust or clothing in the air, such as sitting on small fluff, is easy to attach to the surface of the condenser, resulting in mold and bacteria will multiply.

The specific treatment methods are: first, clean the pipelines of the automobile air conditioning system, including the evaporative condenser, box, etc.; The other is to mask the odor of the air conditioner with perfume or perfume products. The use of flavors or perfumes, of course, can only mask the smell but cannot eliminate the odor, and there is a feeling of "ostrich self-deception".

After cleaning several times, I found that the operation of cleaning the car air conditioner is actually very simple, and the technical content is relatively low. Therefore, I heard that in the community car wash, the car wash room can also wash the car air conditioner, however, soon after cleaning, the fan did not rotate, only after the repair shop repaired, only found that the cleaning liquid corroded the fan control module. Suddenly I understood why it gets dirtier and dirtier when cleaning the car air conditioning system, because the detergent not only removes dust, but also corrodes the pipes, and the pipes become rougher and dirtier after cleaning, and it is easier to attach dust.

In the end, I summarized it as follows:

1. Replace the air conditioning filter frequently, and I will replace the car air conditioning filter every time I change the oil to prevent dust from entering the air conditioning system to the greatest extent and ensure that the air duct of the car air conditioner is clean.

2. Pay attention when using the air conditioner in normal times, generally when using the air conditioner in summer, I will turn off the air conditioner 10 minutes before the air conditioner and switch to the natural wind before the destination, if the weather is humid, it can even be replaced by warm air. Before turning off the engine, try to make sure that the air conditioning lines and evaporation tank are dry.

Because the air duct of the air conditioner has become moldy and needs to be cleaned to restore the smell of the air conditioner to normal, the air conditioner will produce condensation and mold if it is used for a long time.

The inside of the evaporator enters the dust mixed with the condensate, and there will be a musty smell after a long time, and finally it becomes a sour smell, at this time the evaporator needs to be cleaned, and it is best to go to the 4S staff to clean it to avoid damaging the parts.

This is because there will be dust accumulation at the air outlet of the car air conditioner, and when the air conditioner is turned on, the wind will blow out and there will be dust, so there will be a little unpleasant smell. You can buy some aromatherapy or perfume and put it at the air outlet of the air conditioner to relieve it.

This is because your aircon filter hasn't been replaced for a long time and it's covered in impurities and mold, so it's going to smell like this.

It may be that the air conditioner has not been turned on for a long time, or it may be that the smell inside the car is not particularly good, or it may be that the smell outside is not particularly fresh, so there will be some unpleasant smell.

Because when the air conditioner is first turned on, some dust and odor will be emitted inside, so the smell will be very unpleasant.

First of all, the reasons for the peculiar smell after the air conditioner is turned on are:

1. After the air conditioner is used all year round, the indoor filter and copper sheet will squeeze a certain amount of dust, so that after accumulating to a certain amount, a certain odor will be generated, and the air conditioner will be blown into the air with the air conditioner turned on.

2. Because the air conditioner is refrigerated and heated, in many cases, there will be moisture inside the indoor unit, so when the air conditioner is turned off, the air conditioner without dry and mildew prevention function will be shut down immediately, so that the internal moisture has always existed, and mold will be produced in the long run, and the musty smell will naturally occur.

Knowing the reason, then how do we get rid of odors?

1. If the service life of the air conditioner is not very long, and there is dust in the panel and air outlet, the user only needs to wipe it by himself, and open the panel to remove the filter screen for clean water flushing, which can simply solve the problem of peculiar smell.

2. If the air conditioner is used for a long time and the user cannot simply clean it by himself, we need to contact the after-sales service to clean the air conditioner in time to make the air conditioner more healthy and fresh.

The most likely odor in the common air conditioning structure is the evaporation box (evaporator), and the evaporation box is an important part of air conditioning and refrigeration. The "refrigerant" passes through the evaporation box, and the evaporation box absorbs heat through heat exchange with the outside air to achieve the refrigeration effect. A small amount of moisture and dust may adhere to the evaporation chamber, which will cause mildew and odor over time.

The air conditioner filter is mainly to filter the air, and the air will reach the evaporator only after the air conditioning filter, so the air conditioner filter plays the first layer of protection. In addition to filtering dust, the air conditioner filter will also absorb odors, and not changing the air conditioner filter for a long time will also produce odors.

The air conditioning air duct is the ventilation duct, and the air conditioning air duct is easy to accumulate dust, but it is often overlooked. The odor of the air conditioner also has a lot to do with the use environment, for example, if the air quality is not very good, the external circulation is opened, and the air conditioner's own filtration system is not efficient.

1) The solution to the odor of the air conditioning exhaust duct.

The best way is to choose an open, sunny environment, open the door, turn on the external circulation to the maximum (do not turn on the air conditioner), or turn on the warm air for 5-6 minutes to blow the smell out.

2) The solution to the odor of the air conditioner filter.

The air conditioner filter is generally replaced once a year, but it is feasible to change the air conditioner once every three months when the air conditioner is often used or the external environment is extremely poor. If the air conditioner filter is dirty, you can simply blow it, but you should avoid cleaning it many times, otherwise the filtration effect of the air conditioner filter will be significantly reduced.

3) The solution to the odor on the evaporation box.

This kind of odor is more difficult to deal with, usually it is recommended that you go to a professional maintenance company to do air conditioning cleaning, cleaning is when the air conditioner is turned on, spray special air conditioning cleaning agent to the blower.

For new cars, windows should be opened frequently for ventilation, because new car evaporators and other chemicals will be used during assembly, which will emit odors from the air duct and pollute the air in the car. Workaround:

1. Put some bamboo charcoal in the car.

2. Place apples or lemons.

3. Install a car electronic aromatherapy.

If it is the cause of the odor of the old car. Workaround:

1. Clean the air-conditioning system.

2. Clean or replace the air filter.

3. After cleaning, place bamboo charcoal, lemon, electronic aromatherapy, etc. according to the method of the new car to ensure that the air in the car is fresh and pleasant.

Suggestion: In the process of using the air conditioner, it is necessary to prevent the production of condensation, and the air conditioner will blow moldy odor after cleaning, because the condensate in the air conditioning pipe forms a dark and humid environment, which is very suitable for the reproduction of mold. The way to prevent it is to turn off the air conditioner a few minutes before parking and turn on the natural air later, so that the temperature in the air conditioning duct rises before stopping, reducing the temperature difference with the outside world and keeping the air conditioning system relatively dry.

The main reason for the peculiar smell of the air conditioner is that the air conditioner has three major conditions for mold growth (i.e., warmth, humidity and nutrient source), therefore, after these stubborn impurities stay for a long time, the evaporation box of the vehicle will become a place for bacteria and mold to grow, therefore, every time the air conditioner is turned on, these bacteria and mold will enter the cabin with the air conditioning wind, and be inhaled into the human body, causing headache, fever, sudden sore throat, tonsil infection, asthma, flu symptoms, dermatitis and wounds that are difficult to heal and other adverse reactions. In severe cases, it will also make people feel uncomfortable such as dizziness and chest tightness. For example, when the air conditioning system is running, the water vapor in the air forms condensate on the surface of the condensation evaporator of the air conditioner, in which - - part of the water will remain in the evaporator and air conditioning pipeline after the air conditioner is turned off, and these moisture will combine with microorganisms and pollutants in the air to become a breeding ground for mold in the humid, warm and dark air conditioning system. Or because of the nicotine produced by the driver and passengers smoking in the car, and the smell of rubber, plastic and leather in the car, as well as the smoke, dust and exhaust fumes in the outside air enter the car and pollute the air conditioning system.

Reason analysis: The refrigeration principle of air conditioning is to absorb heat through the rapid evaporation of refrigerant, so that the temperature of the air flowing through it drops rapidly. Since the temperature of the evaporator is low and the air temperature is high, the particles of water molecules in the air will condense into water droplets on the evaporator, while dust or clothing in the air.

Substances such as small fluff on the seat tend to adhere to the surface of the condenser, which can lead to mold and bacteria.

Solution: Long-term inhalation of such air by the human body will affect the health of the driver and passengers, so the air conditioning system should regularly replace the air conditioning filter and clean the air channel.

Because the air conditioner evaporation box and ventilation duct are moldy, when the air conditioner is turned on, the air will enter the car through the evaporation box to cool down, in the process of passing through the air outlet, bacteria, dust and other things in the air will enter the evaporation box and ventilation duct, and in the long run, there will naturally be a smell when the air conditioner is turned on. If the air conditioner in the car smells, you have to consider whether the air conditioning filter is dirty, and many car owners never clean the car air conditioner after using it.

Reasons for the peculiar smell of automobile air conditioners:

The evaporation chamber in the car air conditioner works in a cold environment, and water will be produced when it encounters relatively hot air from the outside world. Therefore, the humid environment of the evaporation chamber and ventilation ducts and the dust deposited on the surface provide a breeding ground for mold and fungus. Once molds and fungi encounter a suitable environment, they will quickly multiply into mold and fungal clusters, and in the process of reproduction, they will produce a rotting odor of objects.

These odors will be mixed with the air conditioning as the air conditioner is turned on, and the entire interior of the cabin will be polluted.

Solution: The musty smell of the wind blowing out when the air conditioner is just started is because there is mold breeding in the air conditioner evaporator. To remove odors, you can do this:

You can find a sunny day to drive the car into the sun, let the air conditioning system in the warm windshield, and then turn the air volume to the maximum, and bask in the state of the doors and windows fully open for more than ten minutes; Take care to check that the air filter's filter is clean or needs to be replaced.

In addition, there are many kinds of cleaning agents on the market for cleaning air ducts of air conditioners, and car owners can choose by themselves.

Automobile air conditioning refers to the air conditioning device installed on the car, which can refrigerate, heat, ventilate and purify the air in the cabin, provide a comfortable riding environment for passengers, reduce the fatigue intensity of the driver, and improve driving safety. Air conditioning units have become one of the indicators to measure whether a car is fully functional.

Generally, it includes a refrigeration device, a heating device and a ventilation device, which makes full use of the limited space inside the car, has a simple structure and is easy to operate, and is an internationally popular modern automobile air conditioning system.

Type of air conditioner. 1. According to the driving mode, it is divided into: independent (a special engine-driven compressor, with large refrigeration capacity and stable work, but high cost, large volume and weight, mostly used for large and medium-sized buses) and non-independent (air conditioning compressor is driven by the automobile engine, and the refrigeration performance is greatly affected by the engine work, and the stability is poor, and it is mostly used for small buses and cars).

2. According to the performance of air conditioning, it can be divided into: single-function type (the refrigeration, heating and ventilation systems are installed separately in the morning, operated separately, do not interfere with each other, and are mostly used in large buses and trucks) and integrated cooling and heating (refrigeration, heating, ventilation share blowers and air ducts, which are controlled on the same control board, and can be divided into a combination of cold and warm air working separately and a mixed temperature control type that can work at the same time. Cars are mostly used with mixed temperature control).

3. According to the control mode, it is divided into manual type (toggle the function key on the control board to control the temperature, wind speed and wind direction) and electro-pneumatic adjustment (using the vacuum control mechanism, when the air conditioning function key is selected, the temperature and air volume can be automatically controlled within the predetermined temperature).

4. According to the control mode, it is divided into: automatic adjustment (using the calculation and comparison circuit, through the sensor signal and pre-adjustment signal to control the adjustment mechanism to work, and automatically adjust the temperature and air volume) and the automatic adjustment of microcomputer control (with the branch leakage microcomputer as the control center to achieve all-round and multi-functional optimal control and adjustment of the air environment in the car).

There is a peculiar smell at the air outlet of the automobile air conditioner, and the cause is analyzed: first, check the air conditioner filter, whether it is too dirty and causes peculiar smell. Second, check whether there is any dirt and odor caused by the air inlet of the air conditioner's external circulation. Third, it is recommended to clean the air conditioning evaporation box, which has a peculiar smell caused by mold.

When the air conditioner is turned on in summer, there is always a musty smell when it is blown out, which is the problem of this part, and a detailed operation can be solved.