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List of catalogs of this article:

• 1, How to check the blockage of car air conditioning pipes
• 2, How to diagnose the leakage of the pipeline of the automobile pneumatic pressure system?
• 3、 Can rubber pipes be used for the pipeline of the automobile refrigeration system?

How to check the blockage of the car air conditioning pipe

If the refrigerant inlet of the condenser is blocked, the compressor will have excessive high pressure protection shutdown. The car air conditioner condenser is at the front end of the car. The purpose is to cool the refrigerant in the pipeline by the oncoming wind when the car is running. If the condenser fails, it may lead to an imbalance of pipeline pressure.

So if the liquid dryer is blocked, the liquid dryer will be frozen or frozen.It can be determined whether the air conditioning pipeline system is blocked by measuring the pressure of the air conditioner high and low pressure pipeline.

(1) Use hand feel to detect. The compressor suction tube has the feeling of ice hands, while the exhaust pipe has the feeling of hot hands. There is an obvious temperature difference between the two tubes. ( 2) Observe in the storage dryer inspection window. It can be known through observation. The inside of 90% and 100% of the liquid storage dryer is transparent, and the temperature of the inlet and outlet is uniform and consistent with the hand.

In addition to pressure and water sprint tests, using infrared thermal imagers to detect pipes is also one of the common methods. The entire air conditioning pipe system can be scanned through the infrared thermal imager to detect whether there is a temperature abnormality in the pipe. If there is an abnormal temperature change in the pipe, it may be caused by broken insulation or poor sealing of the pipe.

The method of judging the pipeline blockage of the air conditioner is as follows: Check whether the condenser and evaporator of the air conditioner are freezing. If there is freezing, it is likely to be caused by pipe blockage. Check the pressure gauge of the air conditioner. If the pressure gauge shows that the low pressure is too low and the high pressure is too high, it may also be caused by the blockage of the pipeline.

How to diagnose the leakage of the pipeline of the automobile pneumatic pressure system?

1. Prepare an air leakage electronic stick, then start the car to apply air pressure, and check all the seams and joints from the inflator pump. If there is an air leak, the air leakage electronic stick will immediately make a sound to inform the exact location.

2. Hold the accelerator gently, step on the pedal, and check for deviations. Check whether the braking effect of the two wheels on the same axle is unbalanced.If the purification of the brake shoes is not properly adjusted, the purification of the brakes should be adjusted. Check whether the braking effect of the two wheels on the same axle is unbalanced.

3. If it leaks air when stepping on the brake, it is very likely to be a sub-pump leak. If it is found that the barometer is lowered when parking, it may be a leak in the pipeline joint of the car. It is recommended that the owner use clear water to test the joints of each trachea. You can go to the 4s store to find professional maintenance personnel for inspection.

4. Air leakage when stepping on the brake, there may be air leakage in the sub-pump. When parking, it is found that the air pressure gauge is lowered, which may be the leakage of the automobile pipeline connector. It is recommended that the car owner use clear water to test the joint of each trachea, and you can go to the 4s store for professional maintenance personnel to check it.

Can rubber pipes be used for the pipeline of the automobile refrigeration system?

Each arrow represents an air conditioning pipeline. Among them, rubber tubes are used, and some metal hard tubes are used.

The metal tube is to ensure that the refrigerant can circulate and not leak. The rubber tube is used to drain condensate.

Each rubber has its own characteristics, so it is especially important in the selection of materials for hoses. Basically, the materials used by high-end cars are relatively good, while the materials used by some microcars and vans are poor. For example, some microcars also use nitrile rubber as fuel pipes, which is not suitable for fuel systems.