How to Check for Air Leakage in Car Air Conditioning?

[HarmonyDella]

Air leakage in car air conditioning generally falls into two scenarios: undetectable leakage points during high-pressure checks and issues that arise during the refrigeration operation. The main methods to address these problems are as follows: 1. Soap Water Leak Detection. Fill the system with nitrogen at 10-20 kg/cm² pressure, then apply soap water to various parts of the system. Bubbles will appear at the leakage points. 2. Nitrogen Water Leak Detection. Fill the system with nitrogen at 10-20 kg/cm² pressure and immerse the system in water. Bubbles will indicate the leakage points. 3. Halogen Lamp Leak Detection. Light the leak detection lamp and hold the air tube of the halogen lamp. When the tube opening is near a system leakage point, the flame color will turn purple-blue, indicating a significant leak. 4. Gas Differential Pressure Leak Detection. Utilize the pressure difference between the inside and outside of the system, amplify the pressure difference through a sensor, and express the leak detection results digitally, through sound, or via electronic signals.