The refrigerant of the car air conditioner will not be refrigerated for a month and a half, what s g

The air conditioner is not refrigerated, mainly when the temperature is set in the low temperature gear and the A C key is turned on, after a period of time (the length is different according to the type of car and the service life) it is found that the air temperature from the air outlet does not meet the expectation or does not change, this fault phenomenon is that the air conditioner is not refrigerated, and the possible reasons for this fault phenomenon are as follows:

When the air conditioning fluid is insufficient or there is no air conditioning fluid, it will lead to insufficient liquid pressure in the air conditioning pipe (two silver-white aluminum pipes in the front cabin, the large diameter is the low-pressure pipe, and the small one is the high-pressure pipe) The liquid pressure is insufficient, and the compression pump cannot be driven for refrigeration. If there is a gas pressure relief sound and condensation mist, if there is a statement that the air conditioning fluid in the pipe is normal, if not, the air conditioning fluid in the pipe is insufficient, you need to judge the leakage point and refill the air conditioning fluid, at this time it is more appropriate to go to a professional 4S shop or maintenance shop;

The compression pump does not work, in addition to the lack of pressure of the above-mentioned air conditioner fluid, it may also be the cause of the pump itself, the compression pump fails to work, under normal circumstances, when the A C key is turned on for refrigeration, the sound of the buzzing pump working can be heard in the front cabin in the car, and this kind of fault can only be troubled by professional maintenance personnel;

Failure of electrical components, such as failure of the A C key, failure of the pressure switch, etc.

Either it leaks (you can try it by adding plugging agent) or the compressor is damaged.

There is also a compressor solenoid valve line broken or an insured.

Also, you see if the air conditioner filter is dead.

The air conditioner is not refrigerated, mainly when the temperature is set in the low temperature gear and the A C key is turned on, after a period of time (the length is different according to the type of car and the service life) it is found that the air temperature from the air outlet does not meet the expectation or does not change, this fault phenomenon is that the air conditioner is not refrigerated, and the possible reasons for this fault phenomenon are as follows:

When the air conditioning fluid is insufficient or there is no air conditioning fluid, it will lead to insufficient liquid pressure in the air conditioning pipe (two silver-white aluminum pipes in the front cabin, the large diameter is the low-pressure pipe, and the small one is the high-pressure pipe) The liquid pressure is insufficient, and the compression pump cannot be driven for refrigeration. If there is a gas pressure relief sound and condensation mist, if there is a statement that the air conditioning fluid in the pipe is normal, if not, the air conditioning fluid in the pipe is insufficient, you need to judge the leakage point and refill the air conditioning fluid, at this time it is more appropriate to go to a professional 4S shop or maintenance shop;

The compression pump does not work, in addition to the lack of pressure of the above-mentioned air conditioner fluid, it may also be the cause of the pump itself, the compression pump fails to work, under normal circumstances, when the A C key is turned on for refrigeration, the sound of the buzzing pump working can be heard in the front cabin in the car, and this kind of fault can only be troubled by professional maintenance personnel;

Failure of electrical components, such as failure of the A C key, failure of the pressure switch, etc.

What is the problem with the car air conditioner and refrigerant for a week, it is very likely that there is a problem with your air conditioner itself, which may be bad. Then you go to the repair shop where you refrigerated before.

This may be caused by leakage in the refrigerant pipeline, and there may be a problem with the refrigeration compressor, which needs to be checked and repaired in time.

That means that the location where the refrigerant is stored is leaking. A lot of the refrigerant has escaped into the air. At this time, it is time to inspect the refrigerant storage equipment of the vehicle and then repair it.

After adding refrigerant to the motor vehicle air conditioner, the effect is obvious, and the phenomenon of no refrigeration is found in a week, which is mainly caused by the leakage of the storage tank of the refrigerator.

The absence of the refrigerant indicates that there is in fact a leak point. The pressurization does not leak because the air conditioning system is filled with high-pressure air and the accuracy of the leak detection is not enough.

The advantage of filling the air conditioning system pipeline with high-pressure gas to detect leaks is that it is convenient and fast, but the disadvantage is that the accuracy is not enough.

When the leakage point of the air conditioning system pipeline is very small, the pressure value change of the high-pressure gas filled into it will be very insignificant over a period of time, and many times the pressure gauge cannot show this small pressure value change.

Maintenance Method:

1. Comprehensively inspect the air conditioner.

When using the air conditioner for the first time in summer, you should first check the air conditioning system, such as checking whether the refrigerant and air conditioning filter are too dirty through the liquid storage tank, and whether the radiator has foreign objects.

2. Pay attention to the cleaning of the air conditioner.

Some novices always have to wait until the air conditioner is not working well before thinking of cleaning the air conditioner, which is not right. The air conditioner filter should be replaced regularly, because there is more dust in Beijing spring, and the catkins are flying, which will stick to the filter, which is easy to breed bacteria and make the air conditioner produce musty smell.

3. After parking, do not turn off the air conditioner.

After arriving at the destination, the owner usually closes the air-conditioned car door and leaves directly. Unlike autumn and winter, the huge temperature difference between the inside and outside of the car during the hot summer months can cause mold to grow in the air conditioning system, which in turn can breed mold.

Therefore, the owner should turn off the air conditioner a few minutes before arriving at the destination, turn on the natural air, make the temperature in the air conditioning duct rise, eliminate the temperature difference with the outside world, so as to keep the air conditioning system relatively dry and avoid mold reproduction.

4. Open large air volume regularly.

Some car owners rarely or never turn on the air conditioner to high air volume because they don't like the noise made when the air conditioner is turned on to high gear. However, the air conditioner will suck in a lot of dust when it is used, and it is a simple way to keep the air conditioner clean by turning on the wind energy regularly to blow out the floating dust on the inner surface of the air conditioner. In addition, it is necessary to sterilize, clean and remove odors with a special air duct cleaning solution.

Because the pressure of the high-pressure pipe is not the same, but the pressure leak detection is the average pressure in the air-conditioning pipeline, that is, the high pressure is how much the low pressure is. However, in the case of the air conditioner, the electromagnetic fan does not rotate, or the condenser is too dirty.

Refrigerant, commonly known as freon, also known as refrigerant, is a working fluid used in refrigeration and air conditioning systems to transfer heat energy and produce freezing effects. According to the working mode, it can be divided into primary refrigerant and secondary refrigerant. According to the classification of material properties, it can be divided into natural (natural) refrigerant and synthetic (synthetic) refrigerant.

If the refrigerant is gone, it must be leaking, and there is no leakage when maintaining pressure, maybe because the leakage is small and the reason cannot be checked, or maybe it is the bubble when welding the pipeline.

I'll give you an interpretation of this, the pressure leak detection is generally hit to 15bar = it is enough to burst the pipe, because the pressure of the high-pressure pipe root and the low-pressure pipe is different, but the pressure leak detection is the average pressure in the air conditioning pipeline, that is, how much high pressure is and how much low pressure is.

However, in the case of air conditioning, the high pressure can reach 25 bar=, which is not normal, but the electromagnetic fan does not rotate, or the condenser is too dirty.

In short, what I want to express is that it is not leaking, but it is starting to leak, and it may not have reached the point of leakage.

It's better to use a fluorescent agent to detect.

The reason why the car air conditioner is not refrigerated may be that there is a problem with the compressor, and in the process of use, due to the manufacturing process or parts, it will also lead to the lack of cooling effect in the final car, which includes the possible problems of the air conditioning compressor.

However, the cooling effect of the entire in-vehicle air conditioning system cannot be completely attributed to the compressor, including the electronically controlled clutch, condenser, evaporator, expansion valve, liquid storage dryer, pipeline, condensing fan, vacuum solenoid valve, idle and control system, etc., all affect the final cooling effect.

In a complete set of in-car air conditioning systems, the compressor is known as the heart of the automotive air conditioning and refrigeration system, which plays the role of compressing and transporting refrigerant vapor. However, just like the cardiovascular system of the human body, problems in other parts except the compressor or blocked pipes will cause the cold air to not be delivered to the cab properly.

Liquid storage dryers used to store refrigerants and absorb refrigerant moisture and impurities, as well as condensers and evaporators that change the refrigerant between liquid and gaseous states, all have a key impact on the refrigeration effect of automotive air conditioners.

There are several situations in which the refrigeration effect of automobile air conditioning deteriorates:

1. The condensation net is covered with dust The condensation net behind the front grille is covered by dust, which causes poor refrigeration effect. In this case, the owner only needs to pay attention to rinsing the dust of the condensate with the faucet when washing the car, which can solve this problem.

The inner circulation switch is turned off for a long time.

2. The internal circulation switch is turned off, causing the refrigeration effect to decrease. If the owner accidentally turns off the internal circulation switch, it is equivalent to the air conditioner entering the external circulation state, and the outside air enters, if it is in the external circulation state for a long time, then the dust in the outside air will enter the air circulation, and the evaporator is easy to be polluted, which is not conducive to refrigeration. In addition, odors from the outside world can be rolled into the interior of the car, causing strange smells in the cabin.

Of course, sometimes it is necessary to enter the state of external circulation. For example, when parking and waiting for someone, when sleeping in the car, turn on the external circulation switch, which can allow fresh air to enter the car continuously. This ensures that there is enough oxygen, otherwise it is easy to be poisoned.

3. Refrigerant leakage.

Refrigerant leakage causes a drop in refrigeration. Because the refrigerant will not be evaporated, but its pressure will rise with the increase in temperature, for example, the pressure of the refrigerant in winter is 4 5 kg, but it can reach 8 9 kg in the summer when the temperature is high, when the pressure of the refrigerant becomes larger, even if there is a little crack in a pipe part of the air conditioner, the refrigerant will leak, so the leakage of the refrigerant is for a reason.

First of all, what you need to do is to find the cause of the vehicle leaking refrigerant, and then solve the fault before adding refrigerant. If it is detected that the sealing ring in the pipe joint is rotten and the sealing is not tight, it is very simple, just replace the new sealing ring; If there is a crack in the aluminum pipe or hose in the air-conditioning system, the pipe must be replaced before refrigerant can be added.

Secondly, when adding refrigerant, you should also pay attention to adding refrigeration oil for air conditioning. Because the refrigeration oil is mixed with the refrigerant, when the refrigerant leaks, the oil also leaks; If only refrigerant is added, but not refrigeration oil, the wear and tear of various parts of the air conditioning system will be accelerated due to the lack of refrigeration oil and insufficient lubrication, which will greatly shorten the life of the air conditioner.

Third, add an appropriate amount of refrigerant. If too much refrigerant is added, it will produce "liquid shock", which will also seriously affect the refrigeration effect.

Therefore, if the owner does not find out the reason and directly add refrigerant, the air conditioner can only maintain the cooling effect for a period of time at the beginning, but because the leakage is not remedied, the problem of poor air conditioning will emerge sooner or later.

4. The air conditioner compressor is faulty.

The life of the compressor is very long, if it is calculated according to the general normal annual driving of 30,000 kilometers, the compressor life can reach 20 300,000 miles, so a good compressor will not be broken for 10 years, and the manufacturer's warranty policy for the compressor is two years or 60,000 kilometers. Most of the compressor failures are due to external collisions.

Reasons and solutions for car air conditioners not to refrigerate:

1. Insufficient or too little refrigerant.

The common reason why the car air conditioner does not refrigerate is that the refrigerant is insufficient or too little, which is likely to be caused by a small amount of refrigerant leakage.

Solution: We can observe from the sight glass above the drying tank that when the air conditioner is running normally, if there are continuous and slow 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 it should be noted that if it is added from the low pressure side, it is forbidden to pour the refrigerant bottle; If added from the high-pressure side, the engine is not started.

2. Too much refrigerant.

I didn't expect that too much refrigerant would also cause the air conditioner not to refrigerate. Because the proportion of refrigerant to the volume in the air conditioning system is required. If the proportion is too large, it will affect its heat dissipation, and similarly, if too much cooling oil is added during maintenance, the heat dissipation of the refrigeration system will also decrease.

Solution: Observed from the sight glass above the drying tank. If you can't see a single bubble in the sight glass when the car air conditioner is running, and there are no bubbles after the compressor stops, it must be too much refrigerant.

If there is too much pressurized cooling oil, cloudy air bubbles can be seen in the sight glasses when the air conditioning system is running normally. Of course, if there is too much refrigerant, you can slowly release some of it at the maintenance port on the low-pressure side of the air-conditioning system.

3. The drive belt of automobile air conditioning compressor is relaxed.

Automobile refrigeration depends on refrigerant, refrigerant transmission depends on air conditioning compressor, and the drive belt is an important moving part to drive air conditioning compressor. If the drive belt is loose, the compressor will slip when working, causing the transmission efficiency to decrease, so that the compressor speed will decrease, and the delivery of compressed refrigerant will decrease, resulting in the automobile air conditioner not being refrigerated. If the compressor drive belt of the automobile air conditioner is too loose, it should be tightened at this time, if it is flipped by hand, it means that the drive belt is too tight, and it should be slightly loosened.

Of course, if the fastening is ineffective or the drive belt has cracks and aging damage, a new drive belt should be replaced.

4. Unqualified refrigerant and refrigeration oil.

Too much impurity in the refrigerant and freezer will also lead to the blockage of the filter screen of the automobile air conditioner, resulting in the automobile air conditioner not being refrigerated, its resistance will increase, and the refrigerant flowing to the expansion valve will also be reduced, resulting in insufficient cooling capacity. At this time, it is necessary to choose a qualified refrigerant for maintenance, and a qualified refrigerant plays a key role in automotive air conditioning.