What is the appropriate pressure for car air conditioning pressure testing?

[StChase]

For car air conditioning pressure testing, a pressure of around 20-30 bar is suitable, which should be higher than the working pressure of the car air conditioning system. Nitrogen is generally used for pressurization and leak detection in car air conditioning systems. More details are as follows: 1. During the pressurization and leak detection of the car air conditioning system, use soapy water to check for leaks at the pipe connections. Whether pressurizing from the high-pressure or low-pressure side, the pressure will eventually balance within the system. Nitrogen is typically introduced from the high-pressure side, but Freon can also be added to the system for leak detection using a halogen leak detector, though this method is less effective than soapy water. Since Freon operates at lower pressures within the system, minor leaks may be harder to detect. 2. Once the refrigeration system's vacuum meets requirements and no leaks are found, refrigerant can be added. Before charging, determine the correct amount of refrigerant, as too much or too little will affect cooling performance. The compressor's nameplate usually specifies the type and required amount of refrigerant. 3. When using the car air conditioning, proper maintenance is essential. Avoid randomly adjusting the air vents, as improper direction can reduce efficiency. Based on the principle that cold air sinks and warm air rises, set the vents upward when cooling and downward when heating for optimal performance.