Can the car air conditioner compressor be repaired if it has abnormal noise?

It depends on the specific fault to decide whether it can be repaired.

There are many causes of compressor squeaks. There are several main reasons:

1. The compressor often runs from low speed to high speed under high load, so the requirements for the electromagnetic clutch are very high, and the installation position of the electromagnetic clutch is generally close to the ground, and it will often come into contact with rain and soil, and when the bearing in the electromagnetic clutch is damaged, it will produce abnormal noise.

2. The tightness of the compressor transmission belt also directly affects the life of the electromagnetic clutch. If the transmission belt is too loose, the electromagnetic clutch is prone to slippage; If the transmission belt is too tight, the load on the electromagnetic clutch will increase. Improper tightness of the transmission belt will cause the compressor to not work, and at worst it will cause damage to the compressor.

When the transmission belt is working, if the compressor pulley and the generator pulley are not in the same plane, the life of the transmission belt or compressor will be reduced.

3. The repeated engagement of the electromagnetic clutch will also cause abnormal noise in the compressor. For example, insufficient power generation from the generator, high pressure in the air conditioning system, or excessive engine load can cause the electromagnetic clutch to engage repeatedly.

4. The gap between the electromagnetic clutch and the compressor installation surface. There should be a certain gap between the compressor mounting surface of the electromagnetic clutch, if the gap is too large, then the impact will also increase, if the gap is too small, the electromagnetic clutch will work with the compressor installation surface between the motion interference, which is also a common cause of abnormal noise.

Compressor bearing ringing is possible.

Hello, it depends on what is broken and whether there are accessories to decide.

Do you want to ask what to do if the car air conditioner compressor is squealing? Here's how to fix it:

1. Due to the abnormal noise caused by the electromagnetic clutch can not mesh normally, slip or damage, overhaul the clutch solenoid valve coil and readjust the clutch clearance according to the regulations.

2. If the automobile air conditioning compressor is abnormal, first check the air conditioning belt, whether the installation screws are loose, whether the belt is oily, and whether the belt is worn.

3. During the working process of the air-conditioning compressor, the compressor will have abnormal noise, the main reason for the jamming is poor lubrication, when there is a lack of lubricating oil, there will be serious abnormal noise inside the compressor, and even cause the compressor to wear and tear and scrap.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal operation of the car without repair.

On the issue of abnormal noise of automobiles, it is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones are reasonable abnormal noises. Only nearly 20% of the vehicles that went to the repair shop to detect abnormal noises really had problems. The difference between models with turbocharged engines is concealed in the socks; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that due to their lack of understanding of mechanical knowledge, they mistake reasonable abnormal noise as a vehicle failure.

Therefore, learn to distinguish the abnormal noise of the car and avoid wasting time and energy.

Second, the identification method of car noise:

In practice, due to the limitations of working conditions, it is difficult to measure the sound of the car with special instruments, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal and abnormal sound in the fiber hall.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, we must first distinguish between normal sound and abnormal noise. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal operation of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

A common cause of compressor noise is a problem with the compressor's electromagnetic brakes. Compressors often operate under high loads, so the demands on electromagnetic brakes are high. Electromagnetic Chunzhou brakes are generally installed close to the ground and are often exposed to rain and mud.

When the bearings in the electromagnetic brake are damaged, a noise is emitted. The lack of lubricating oil in the compressor can also lead to noise inside the compressor. If the lubricating oil is not handled properly.

The tightness of the conveyor belt in the compressor drive system can also cause noise in the car's empty compressors. Compressor drive system conveyor belts that are too tight and too loose can jeopardize the life of the electromagnetic brakes. If the belt of the drivetrain is too loose, the electromagnetic brake can easily come off.

If the system's drive belt is too tight, the load on the electromagnetic brake increases. If the tension of the transmission belt is not suitable, the compressor will not work if it is light, and it will damage the compressor if it is heavy. The spatial gap between the electromagnetic brake and the compressor mounting surface, as well as the repeated suction and engagement of the electromagnetic brake, can cause compressor noise.

When the car air conditioning compressor is noisy, it is recommended to fix it as soon as possible. The adjusted refrigerant must be depressurized according to air, so that the ultra-low temperature and low pressure refrigerant is compressed and reduced into high temperature and high pressure gas, and then liquefied and dissipated by the condenser. When the empty compressor is damaged, it also makes a clicking noise.

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When the air conditioner is not turned on, the air conditioner compressor makes abnormal noise, which is caused by the mutual interference between the compressor clutch pulley and the suction cup. When the internal lubricating oil of the compressor is less and the lubrication is insufficient, it will cause friction and abnormal noise. Abnormal noise caused by compressor belt slippage, usually when the engine is running, there is a strong harsh belt slipping sound when the air conditioner is turned on.

The reasons for the abnormal noise of the automobile air conditioning compressor are: 1. When the air conditioner is turned on, it may be that the refrigerant is filled too much or too little, and the flow sound generated when passing through the expansion valve. 2. The compressor resonates with other parts of the gear train at a certain speed, and abnormal noise occurs.

3. The suction and exhaust pulsation of the compressor itself is large, and the pulsation generated is transmitted to the air-conditioning box through the air-conditioning pipeline, and amplified to produce abnormal noise.

4. The compressor bearing is damaged, in this case, shake the compressor pulley up and down by hand, there will be a lot of shaking, and there will be a metal friction sound after starting. 5. The belt clutch of the compressor is damaged, which is generally after opening the compressor, there is a serious metal friction sound, and the abnormal noise is eliminated after closing. 6. If the gap between the electromagnetic clutch and the compressor mounting surface is too large, the impact will also increase, resulting in motion interference.

Photo by Chen Min2) @2019