The cooling effect of car air conditioning is not good, which may be the reason

In the hot summer, I believe that many car owners will encounter the wind blowing out of the car air conditioner, but it is not cool, which is very distressing. First of all, in terms of the structure of automobile air conditioners, the obvious difference between automobile air conditioners and household air conditioners is that they use different drivers, which are composed of compressors, pressure switches, blowers, and other components.

The car air conditioner is not cool, you have to look at these things

1. Check if there are any Fluorine leakage

2. Whether the air conditioner filter element is too dirty

3. Whether the appearance of the air conditioner condenser is clean

4. Whether the fan is clean or blocked (in winter and summer, the blower is not blocked) There will be some water vapor, and the muddy dust particles will block the appearance)

For these, many car owners can see It is more intuitive to show the reason why the car air conditioner is not cooling. For the intuitionistic judgment, only some instruments can be used to measure, which requires professional personnel to operate. Generally speaking, first check whether the high pressure and low pressure of the refrigerant (134a) are normal (the inspection is carried out during the driving process). Generally speaking, the high pressure should be 1.3-1.7MPa (13-17kg/cm2 or 190-250Lbf/in2); The low pressure should be between 0.15-0.25MPa (1.5-2.5kg/cm2 or 20-35Lbf/in2). If the low pressure is higher or lower than this range, it means that the expansion valve is not adjusted properly. If there is a problem with the compressor, it is not in this category.

To judge whether the air-conditioning compressor is operating normally, you can intuitively feel whether the car's low-pressure pipeline is cold with your hands, or you can use the pressure gauge to determine the low-pressure and high-pressure To make more direct judgments.

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