Automobile air-conditioning pressure is an important element in the repair and maintenance of car air-conditioning。
Operational steps for car air conditioning:
Preparation tools and equipment: tools such as air-conditioning pressure sheets, refrigerant filling tubes, refrigerant bottles, pressure pumps, etc. Are required。
2. Connecting equipment: the high pressure and low pressure tubes of the air-conditioning pressure table group are connected to the high pressure and low pressure interfaces of the car air-conditioning system, respectively. Make sure it's close and clean。
3. Vacuum: prior to pressure, air conditioning systems are operated in a vacuum to exclude air and water from the system. The vacuum is usually 15 - 30 minutes until the vacuum reaches the specified value。
4. Commence pressure: use pressure pumps to inject nitrogen into air conditioning systems or dry compressed air. When pressurized, the pressure is gradually increased, usually reaching 15 - 20 bar and 10 - 15 bar。
5. Pressure protection observation: upon completion of the pressure, the pressure is maintained for a period of time, usually 15 - 30 minutes, and the pointer of the pressure table is observed to decrease. If the pressure drops significantly, the system leaks。
The following are some of the things that need to be noted when pressing:
1. Ensuring the integrity and accuracy of tools and equipment and the calibration of pressure sheets to ensure the reliability of measurements。
2. The operating environment shall be clean and dry to avoid dust and moisture entering the air conditioning system。
3. Pressure increases slowly and evenly when pressed, avoiding abruptly excessive pressure to avoid damage to the system。
4. The various interfaces, pipes, compressors, etc. Of the air-conditioning system are carefully checked during pressure-push observation to see if there are any signs of leakage, such as oil stains, bubbles, etc。
5. If leaks are detected, pressure should be stopped and repaired in a timely manner. Once repaired, re-pressure tests are required to ensure that the system is not leaking。
During pressure, the operator shall wear protective glasses and gloves to prevent accidents。
In order to present the relevant information more clearly, the following is a simple table comparison:
Attention to operational steps
Preparation tools and equipment
Make sure the tools are complete and accurate
Connect devices
Make sure the connection is close
Take a vacuum
Operation to clean and dry the environment
Start pressing
Slow and even increase pressure
Pressure observation
Check the leaks
In general, vehicle air-conditioning voltage needs to be carried out strictly in accordance with operational steps and attention paid to related matters to ensure proper operation and maintenance of air-conditioning systems。
