Doesn't the air conditioner be cool enough to add some refrigerant? Have these aspects been checked?

Just a few days after entering May, the weather began to hit the summer directly. The air conditioner that has been silent for a whole winter will start to be requisitioned again, and all kinds of problems will start to break out in old cars, and the air conditioner will not be cold for some reason. Now that the air conditioner has been turned on to the maximum and the temperature is adjusted to the minimum, the measured temperature of the air outlet is only about 10.2 degrees. For the hot summer, this basically means that there is no cooling rhythm.

The air-conditioning system is not complicated. Both refrigerant and heat dissipation can cause poor air-conditioning. However, the measured data is that the pressure of the air-conditioning refrigerant is large enough, indicating that the refrigerant is not missing, the radiator is quite clean, and the heat dissipation effect is excellent. Since there are no problems with the most important two items, plus the eight-year age of this car, the internal pipes of the air conditioner must be too dirty to cause the cooling effect to be poor.

The traditional method needs to completely dismantle the pipelines before cleaning, which is very time-consuming and physically demanding, and some fragile pipelines of old cars simply cannot withstand Toss, it's really better to be quiet at this time. This equipment can be connected to the high and low pressure pipelines of the air conditioning system for cyclic cleaning. Its cleaning process is a bit complicated, because the internal pipeline of the air conditioner still contains refrigerant, so it also involves the problem of recycling. The engine cannot be started during the cleaning process, and the pipeline is cleaned by the pump cycle inside the equipment. Although the liquid R134A (refrigerant) itself is not a refrigerant, it also plays a role of cleaning at this moment, using the refrigerant itself to bring out the residue inside the pipeline.

Before starting, the inside of the drain bottle is clean and free of dirt. In the subsequent work, this drain bottle will collect the dirt from the internal pipes of the air conditioner, and the scene will definitely shock your eyes. After only half an hour, the oil drain bottle was already full of dark stains. These dark things are nothing but the metal powder and the aging of the refrigerating oil produced by the wear and tear of the air-conditioning compressor. Air-conditioning compressors are actually the same as engines. They both run on pistons, and they will wear out, so they all need maintenance.

Have you seen a lot of cars with a relatively large kilometer? It is clear that the air-conditioning compressor has no appearance damage, but it is cooling difference. The main reason is lack of maintenance and huge internal wear, resulting in poor cooling effect. Regular air-conditioning maintenance can of course extend the service life of the entire air-conditioning system. Although the compressor refrigerating oil is already protecting the compressor, it is still necessary to inject a certain protective agent to increase its wear resistance.

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