What Causes the Constant Bursting of a Car Air Conditioning Safety Valve?
2 Answers
Pressure valves burst because the pressure exceeds the range that the pressure valve can withstand. This may be caused by poor heat dissipation or the pressure valve being of poor quality. Below are the functions of car air conditioning: 1. Temperature regulation: This is the main function of car air conditioning. In summer, the cooling system generates cold air to lower the temperature inside the cabin. In winter, except for large commercial vehicles that use independent combustion heaters for heating, other vehicles basically utilize the residual heat of the car for heating. 2. Humidity regulation: Humidity greatly affects the comfort of passengers inside the car. The humidity inside the cabin should generally be maintained between 30% and 70%. Ordinary car air conditioning systems do not have the function of regulating cabin humidity; this can only be achieved by using ventilation devices or advanced luxury cars equipped with integrated heating and cooling air conditioners. 3. Airflow regulation: The velocity and direction of airflow significantly impact human comfort. If the airflow is direct, the velocity should be limited to a certain range when the temperature is suitable. The velocity can be appropriately adjusted based on passengers' living environment, age, health status, and temperature preferences. 4. Air purification: The quality of air inside the cabin is an important factor in ensuring comfort.
In my years of repairing cars, it's quite common for the AC safety valve to burst open. The main cause is excessive system pressure, such as overcharging the refrigerant, which exceeds the pressure limit and forces the safety valve to open and release pressure. Blockages in the condenser can also drive up the pressure by preventing heat dissipation. The safety valve itself might be aging or have weakened springs, making it unable to control the pressure. Problems with the expansion valve are even more troublesome, as improper flow regulation can cause fluctuations. If not repaired promptly, the compressor may burn out, and refrigerant leaks from the pipes are environmentally harmful. It's essential to visit a professional shop immediately. They use pressure gauges to test high and low pressure values, identify the cause, and take appropriate measures, such as releasing excess refrigerant or cleaning the radiator fins. Regular maintenance should include checking the AC system's condition to prevent issues.
