Vehicle refrigerant recovery and recharge are important procedures in automotive air conditioning systems. Here's an explanation of each step:

1) Refrigerant Recovery: When a vehicle's air conditioning system needs maintenance or repair, it's crucial to recover the refrigerant from the system before any work is done. This process ensures that the refrigerant, which may be harmful to the environment, is properly handled and not released into the atmosphere. Refrigerant recovery involves the following steps:

a. Evacuation: The technician connects a recovery machine to the air conditioning system and uses a vacuum pump to remove any remaining refrigerant, oil, and moisture from the system. This step helps prepare the system for proper servicing.

b. Storage: The recovered refrigerant is stored in specialized containers or tanks that are designed to safely hold and transport the refrigerant without leaks or contamination.

c. Recycling: If the recovered refrigerant meets certain quality standards, it can be recycled and reused in other air conditioning systems, reducing the need for new refrigerant production.

2) Refrigerant Recharge: After the necessary repairs or maintenance have been completed, the next step is to recharge the air conditioning system with the appropriate amount and type of refrigerant. This process involves the following steps:

a. System Inspection: The technician examines the air conditioning system to ensure that all components are in proper working order and there are no leaks or other issues that could affect the performance of the system.

b. Evacuation (optional): If the system was opened for repairs, the technician may evacuate the system again to remove any contaminants or air that entered during the repair process.

c. Recharging: The technician connects a refrigerant charging machine to the system and adds the appropriate amount of refrigerant, according to the manufacturer's specifications. The machine measures the pressure and temperature to ensure the correct recharge level.

d. Leak Testing: After recharging, the system is tested for leaks using specialized tools and techniques. If any leaks are detected, they need to be repaired before the procedure can be considered complete.

e. Performance Testing: The air conditioning system is tested to ensure that it is cooling properly and providing the desired comfort level inside the vehicle.

By following these steps, vehicle refrigerant recovery and recharge help maintain the efficiency and functionality of automotive air conditioning systems while also ensuring proper handling of refrigerants to protect the environment.