Now is the spring season, the temperature is suitable, when the car owners travel, the air conditioning system does not need to open. But as the saying goes: It's too late to get dry food and take care of the air conditioner if you find it in summer. Moreover, after entering the summer each year, the number of vehicles undergoing air-conditioning troubleshooting at the 4S shop is very large, and even a queue for appointment is needed. If the car owners can take precautions, make an early inspection of the air conditioning system in advance, so that it is very easy to communicate with the repair shop and solve the problem. This article will teach you a few tips on the car's air conditioning system to do a preliminary inspection.
Check the air conditioning filter owner to open the wind speed adjustment switch, with the increase of adjustment gear, test the outlet wind speed changes, if the air volume is small and the change is not obvious, you should consider whether the air conditioning filter element is too dirty to affect the air volume, replace the air conditioning Filter can be solved.
Checking the condenser The condenser is an important part of the air conditioning system. The high-temperature, high-pressure liquid freon, after passing through the condenser, will turn into a low-temperature, high-pressure liquid freon. Therefore, the quality of the condenser affects the cooling efficiency. You can observe the surface of the condenser through the central air inlet grille (the light is not good enough to use a flashlight). If the gap in the condenser sheet is covered with foreign material such as catkins and dust, this will have a certain effect on the heat dissipation efficiency of the condenser. In this case, the physical change of the refrigerant in the condenser is also affected, which in turn reduces the cooling capacity of the air conditioner.
Viewing refrigerant The refrigerant in Haval's air conditioning system is filled with R134a, which is currently the most widely used refrigerant. The air-conditioning system has strict requirements for the amount of refrigerant refueling. No more or no less, the owner can judge by observing the glass observation hole in the air-conditioning duct in the engine room. The method is as follows:
1. When the compressor is running normally, there is no air bubble in the glass hole. When the compressor stops working, there will be brief bubbles, indicating that the amount of fluorine is normal;
Second, when the compressor continues to operate normally, there are continuous bubbles in the glass, indicating that the amount of fluorine is insufficient and needs to be added;
3. When the compressor continues to operate normally, there is no air bubble in the glass hole. When the compressor stops working, there are no short-lived air bubbles, indicating that the amount of fluorine is large and needs to be discharged.
Generally speaking, the causes of refrigerant leakage are mostly the aging of the seal ring and the damage of the pipeline. Therefore, before the refrigerant is added, a leak detection of the air conditioning system of the vehicle needs to be performed to ensure that the air conditioning equipment has no leakage point to add fluorine.
Judging whether the air-conditioning compressor is working For most household cars, the air-conditioning compressor relies on the electromagnetic clutch to control whether the compressor performs cooling work. After pressing the "AC" switch in the car, it can be heard in the engine compartment under normal conditions. A "click" sound, which is the sound of the electromagnetic clutch, shows that the air conditioner compressor starts to work. If the compressor is not working, it cannot be simply judged that the air-conditioner compressor is broken, because there are many reasons that cause the air-conditioning compressor not to work. At this time, it is recommended to go to a 4S shop or a professional maintenance shop for further inspection.
Checking the tightness of the air compressor belt compressor transmission belt can directly affect the effect of the use of automotive air conditioning. After the belt is used for a period of time, it will age and become loose. At this time, it will give off a "bang" noise. At this time, we must adjust the tightness of the compressor belt in time. If it is severe or cracked, it should be replaced in time. Note: Never touch the belt with your hand when the engine is running, otherwise it is easy to get your fingers in and cause injury.
Summary: A winter air-conditioning refrigeration system was deactivated. The lack of necessary lubrication and protection may cause signs of aging in the pipeline seals. Once the compressor is turned on again, the pressure in the pipeline may rise, which may lead to a tube. There is a leak in the road interface. Causes of poor air-conditioning cooling are various and the methods of processing are not the same. The inspection items mentioned in this article are easy to learn, and you can make a preliminary judgment on the air-conditioning problem without any tools. The owner can even try to solve it himself. Even if the problem cannot be solved by itself, you can be aware of it so that you can go to the shop for maintenance in the future.
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