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What is the function of adding refrigerant to a car?

1 Answers

VanBriella

07/29/25 10:24pm

Adding refrigerant to a car serves the purpose of achieving rapid cooling effects. Below are detailed explanations about adding refrigerant: 1. Methods of adding refrigerant: There are two methods for adding refrigerant. One is high-pressure side charging, suitable for charging after leak detection and vacuuming. Note that this method must not involve starting the compressor, with the engine turned off, and the refrigerant canister needs to be inverted. The other method is low-pressure side charging, which involves adding gas and is characterized by slower charging speed, typically used for replenishing refrigerant. 2. Precautions for high-pressure side charging: Inject the specified amount of liquid refrigerant from the high-pressure side. Close the refrigerant canister injection valve and the high-pressure manual valve on the manifold gauge, then remove the gauge. When charging refrigerant from the high-pressure side, ensure the engine is not running (compressor off), and do not open the low-pressure manual valve on the manifold gauge to prevent hydraulic shock. 3. Precautions for low-pressure side charging: After adding the specified amount of refrigerant to the system, observe through the sight glass. If there are no bubbles and no excess refrigerant, then adjust the engine speed to 2000r/min and set the blower to the highest speed.

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