What s the reason for the poor refrigeration effect of car air conditioning?

Refrigerant leakage, insufficient refrigeration, and the air conditioner filter has not been replaced for too long and is blocked.

The tightness of the compressor belt needs to be checked; Check the hose joints of the air conditioning system for oil stains; Clean the surface of the condenser regularly; Check the refrigerant level height; Replace the flap motor.

Reasons and solutions for the poor refrigeration effect of automobile air conditioning:

1. Lack of freon, check to see if there is a leak, you can drop some water at the pipe joint of the car, bubbles will generally appear in the leaking place, find the leakage to repair it, and then go to the car repair shop or maintenance shop to add freon.

2. The filter screen is too dirty, you can try to find the bypass valve on the filter element base of the filter screen, when the pressure difference between the two sides of the valve reaches a certain value, it can be opened, and the general oil flows into the main oil pipeline through this pipeline, and other related parts are lubricated with special lubricants for automobiles, so that it is almost the same.

3. If the antifreeze is not enough, you can ask the people nearby to see if there is a 4S shop or car repair shop, and you can only find a professional car repairer.

4. If the doors and windows of the car are not closed well, carefully check whether the doors and windows of your car are not closed well, and if they are closed, it is other problems.

5. The air conditioning core is too old, if the air conditioning core of your car has used a lot of time, it may be a problem with the air conditioning core, and you will install it to buy an air conditioning core and install it yourself, and you will only find a car maintenance shop and a car repair shop.

6. If the pressure of the refrigerant is too large, check the pressure value of the refrigerant with a pressure gauge and clean the condenser by the way.

7. If the refrigerant is not enough, you can use the pressure gauge to check the lower pressure value in the case of landing, and carefully see whether the refrigerator is normal, if not, the refrigerant is not enough, and the cold air is not cold or windy if the refrigerant is not enough. If the refrigerant is not enough, find a car repair shop to add it.

There are the following reasons why the refrigeration effect of automobile air conditioning is not good:

1.Reason 1: There is a leak in the refrigerant and the pressure in the pipeline is insufficient.

During the use of air conditioners, the refrigerant will also constantly produce chemical changes. The refrigerant that deteriorates slowly will continue to corrode various parts of the air conditioning system, such as the sealing rubber ring and rubber pipes, which in turn will lead to the leakage of refrigerant and compressor oil. The more inferior the refrigerant, the faster it deteriorates, and the more likely it is to cause corrosion and leakage of the air conditioning system.

Once you find that you need to add refrigerant frequently to maintain the cooling effect, you must ask the maintenance personnel to check whether there is a leak and solve the problem fundamentally.

2.Reason 2: The heat dissipation capacity of the condenser is reduced.

Riders know that there is a grille-like thing at the front of the engine compartment of the car, which is the condenser that dissipates heat from the air conditioner.

The longer we drive, the more oily mud or debris will cover the surface of the condenser, which will reduce its ability to dissipate heat. In addition, the failure of the cooling fan and the slack of the drive belt will also lead to a decrease in the heat dissipation capacity of the condenser.

In this case, we can first brush the dirt on the surface of the condenser with a soft brush. If the cooling fan has abnormal noise or the belt is loose, it should be repaired or replaced in time.

3.Reason 3: The air duct is blocked and the air conditioning pipe is dirty.

You can turn on the wind to the maximum and test the wind power of the air outlet with your hands, if you find that the wind is obviously not as strong as before, it is likely that the air duct is blocked.

The car's air conditioning system has an air cleaner element, which is generally located behind the co-pilot's glove box.

The function of the air conditioning filter is to block the dust and impurities inside the car from entering the car, so it is natural that there will be a lot of dirt blocking the air outlet after a long time. Once blocked, the air volume will naturally decrease, but it will also have a peculiar smell. At this time, you only need to replace or clean the filter element to ensure the cooling effect of the air conditioner!

4.Reason 4: Turn on the external circulation for a long time.

Some air conditioners do not have a good cooling effect due to wrong air conditioning habits, such as turning on the air conditioner while keeping the external circulation on.

Turning on the air conditioner while opening the external circulation is undoubtedly to lead the heat outside the car to the car, and the refrigeration effect of the air conditioner will naturally deteriorate, so when the weather is hot, it is necessary to adjust it back to the internal circulation as soon as possible after the external circulation ventilation. Of course, it can't be circulated all the time, and the air in the car cannot be circulated for a long time, which is not only easy to get air conditioning disease, but also easy to cause carbon monoxide poisoning, and the best way is to use internal and external circulation alternately.

Hello, the reasons for the poor refrigeration effect of automobile air conditioner are blocked cabin air filter, blocked condenser, lack of refrigerant, and so on.

Check whether the refrigerant pressure is normal and whether the fan can dissipate heat

In summer, if the car air conditioning and refrigeration effect is not good, it will bring a very uncomfortable experience to the driver and passengers.

Causes and solutions to the poor refrigeration effect of automobile air conditioning:

1.Lack of CFCs. Check for leaks, dripping water is at the pipe joints of the car, the leak usually bubbles, find the leak and fix it, then go to the garage or repair shop to add freon.

2.The filter is too dirty. You can try to find a bypass valve at the bottom of the filter, when the pressure difference between the two sides of the valve reaches a certain value, this bypass valve will open, usually through this bypass valve, the oil will flow into the main oil pipeline, and lubricate other related parts through a special automotive lubricant.

3.There is not enough antifreeze. You can ask someone nearby to see if there is a 4S shop or garage repair shop, and you can only find someone from a professional repair shop.

4.The doors and windows were not closed. Double-check your doors and windows to see if they're closed, which is another issue.

5.The core of the air conditioner is too old. If you spend a lot of time on the air conditioner core of your car, it may be a problem with the air conditioner core, and you will install an air conditioner core shop yourself, and you will not just look for car repair shops and repair shops.

6.The pressure of the cryont is too great. Check the pressure value of the refrigerant with a pressure gauge and clean the condenser properly. It's going to be fine.

Automotive air conditioning device (hereinafter referred to as automobile air conditioner). It is used to adjust and control the temperature, humidity, air cleanliness and air flow in the car compartment in the best state, provide a comfortable riding environment for the occupants, and reduce the fatigue of the journey; Ventilation devices that create good working conditions for drivers and play an important role in ensuring safe driving.

It generally includes refrigeration units, heating units and ventilation units. This kind of combined device 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.

With the rapid growth of the automobile industry, especially cars, in the past few years, the auto parts industry has also developed rapidly, automotive air conditioning as an important component to improve the comfort of the car has been recognized by the majority of automobile manufacturers and consumers, until August 2013, in China, the domestic car air conditioning device rate has been close to 100%, in other models of the device rate is also increasing year by year, the automotive air conditioning device has become a pivotal functional component in the car.

As the world's main air compressor production base, in recent years, benefiting from the rapid development of the national economy and the automobile industry, China's automotive air conditioning industry has also achieved rapid development.

The above content reference: Car Air Conditioner (Car Device) Encyclopedia.

Check these three areas, or the source of the problem.

The first one: the decline in the refrigeration efficiency of automobile air conditioning is to see if there is a problem with the refrigerant of air conditioning refrigeration. The scientific name of the refrigerant is the refrigerant of the air conditioner, and the reason why the air conditioner can be refrigerated is because the refrigerant plays a huge role in it, and if the refrigeration efficiency of the air conditioner decreases, you can check whether the refrigerant is leaking or needs to be replaced.

The second: air conditioning filter, the air conditioning filter is used to filter the dust in the air, which can ensure that the air in the car is not polluted by the outside world. However, if you do not pay attention to cleaning and replacing the air conditioning filter, it will cause the filter element to be blocked, and the air conditioning filter element will not only block the hot air discharge in the car, but also enter the car with less cold air, which will not only affect the refrigeration but also bring a lot of low-quality air to the car.

Third: cleaning of the air conditioning pipe, because the air conditioning pipe can circulate the air in the car, so pay attention to avoid the air conditioning pipe being blocked. Moreover, after a long time in the air conditioning duct, a lot of bacteria, dust and viruses will accumulate.

If you don't clean up, these harmful substances will circulate in the car and take turns to invade the human body, so it is necessary to clean and sterilize the air conditioning ducts regularly.

1. The air conditioner switch is not turned on. You must know that the air conditioner switch is a c, and some new car owners will be prone to make such mistakes.

2. The air outlet is closed or the wind direction is wrong. First of all, it is necessary to ensure that the air outlet is open, and the air outlet is not blocked by foreign objects, and then you should also have some understanding of the wind direction adjustment of the air outlet.

3. Open external circulation in hot weather. At this time, the external circulation is undoubtedly to lead the hot air outside the car into the car, and the refrigeration effect of air conditioning will naturally deteriorate, so if there are no special circumstances in hot weather, the internal circulation method should be used as much as possible.

4. Turn on the air conditioner when the car is at high temperature. Especially if you are exposed to the sun for a long time, remember to open the windows to let the heat out, and then turn on the air conditioner.

5. The outdoor temperature is too low, resulting in the air conditioner not working.

6. The ring temperature is too low: the ambient temperature is lower than 16 degrees, you need to open the low temperature compensation switch, open it without heating, check the heating wire and magnetic temperature switch according to the detection method in the mechanical refrigerator does not start, the heating wire and magnetic temperature switch are normal but there is no voltage input, which can be judged to be the main control board fault or line fault.

Hello, in this case, first of all, there is an air conditioning pressure gauge, to detect whether the pressure of the air conditioning system is normal, if the pressure is too low, this is a lack of refrigerant, you need to replenish the refrigerant in time to achieve normal, but also to clean the front radiator, to ensure good heat dissipation, timely maintenance to ensure that the driving is stable, comfortable and safe, thank you.

Automobile air conditioning is not refrigerated or insufficient air conditioning is a common fault of the air conditioner, and its basic maintenance method can be mastered by general maintenance workers, that is, starting from the easy part, through the eyes and ears to find the cause or part, which is called the sensory inspection method, and another detection method - instrument detection method, is easy to be ignored, the method can often help to find the cause of the fault accurately and quickly.

1. Sensory examination method:

1.Compressor operating status:

Whether the transmission belt is broken or slack, if the transmission belt is too loose, it will slip, accelerate wear and cannot transmit power.

Whether there is noise inside the compressor.

Noise can be caused by damaged internal parts, which cannot be compressed effectively.

Whether the compressor clutch is slipping.

2.Condenser & Fan Status:

Whether the condenser fins are covered in dust.

If the condenser fins are covered in dust, the efficiency of the condenser will be greatly reduced.

Whether the condenser fan is working well.

3.The blower fan is running.

Make the fan run at the "low, medium and high" three speeds, if there is abnormal noise or poor operation of the motor, it should be repaired or replaced, otherwise the air supply airflow is insufficient.

4.Check the amount of refrigerant liquid.

If you see a large number of bubbles through the observation window, the refrigerant is insufficient. If you pour water on the condenser to cool it and there is still no foam in the observation window, it means that the refrigerant is excessive.

Check the joints and joints of each device for oil stains.

Oil stains in joints or joints indicate refrigerant leakage and should be re-strengthened or replaced. (Leak detector can be used to detect leaks).

5.Whether the HVAC valve or thermal control windshield is closed, and whether other windshield adjustments are normal.

First, it may be that the refrigerant leakage is insufficient (commonly known as "refrigerant" is not enough), and the refrigerant can be added. Second, the power supply voltage is not enough, and the compressor cannot operate normally. It is advisable to pretend to be a voltage regulator.

3. The refrigeration power of air conditioning is small and the room area is too large; Room insulation is not effective. Take these factors into account when choosing an air conditioner. Fourth, the external environment temperature is too high.

5. The air conditioner is not cleaned and maintained for a long time. 6. The copper pipe connecting the indoor unit and the outdoor unit is too long.

Questions. Yesterday I installed an excavator for refrigeration.

Turn on for ten minutes so the compressor is a little hot.

You're talking about voltage.

Insufficient line pressure.

Questions. The generator generates 13.9 volts, which used to drop by 5 volts and 6 volts when cooling, but now it drops by 10,000 volts and 3 volts.

In this case, it could be that you have a problem with the installation.

The following points need to be checked when the air conditioner is not cooling:

1. Whether there is a refrigerant in the system, if not, it needs to be pressurized to check the leakage, and then add enough.

2. If there is refrigerant, check whether the compressor is working. If it is not working, you need to check whether there is any problem with the air conditioner pressure switch, temperature control switch and its wiring.

3. Check the heat dissipation of the air conditioner to see if the fan is working. Clean the condenser.

4. Replace the air conditioner filter, the filter element is too dirty, and it will also cause no refrigeration.

Insufficient or too little refrigerant.

It can be observed from the sight glass above the drying tank that when the air conditioner is running normally, if there are continuous and slow air bubbles in the sight glass, the surface refrigerant is insufficient. If there is a significant bubble flipping, it means that the refrigerant is seriously insufficient. If the refrigerant is insufficient or too little, the solution is to add refrigerant, but be careful that if it is added from the low pressure side, it is forbidden to pour the refrigerant bottle, and if it is added from the high pressure side, it is forbidden to start the engine.

The maintenance cost is about 200 yuan.