Short answer is that you don't. If you need to do this, then you have a certified shop recover and store it.
It compresses the refrigerant (probably r134a) and pushes it through the ac system.
Can be added with refrigerant check can contents
The purpose of the AC vent hose in a car's air conditioning system is to carry cold air from the air conditioning unit to the vents inside the car, allowing the cold air to be distributed throughout the interior of the vehicle.
Is this vent in a car or house??
To properly add refrigerant to an AC system, you need to first locate the low-pressure port on the system. Then, attach a refrigerant gauge and hose to the port. Start the AC system and slowly add refrigerant until the pressure reaches the recommended level. Be careful not to overfill the system.
To add refrigerant to an AC system, first locate the service valves on the unit. Connect a refrigerant charging hose to the low-pressure service valve. Turn on the AC system and slowly add refrigerant until the pressure reaches the recommended level. Be careful not to overfill the system.
MY WIFE TOLD ME: THAT HAPPENS WHEN THE AC SYSTEM IS LOW IN REFRIGERANT, (IF SHE SAYS THAT , IT'S TRUE )
A refrigerant recovery machine is required.
This normally indicates a refrigerant leak. STOP USING YOUR AC IMMEDIATELY AFTER THE ACKNOWLEDGEMENT OF THIS SMELL!! The fumes from the fluid in your AC system are highly toxic. The leak needs to be sorted out before the AC can be used again.
R134a
To check the AC refrigerant level in your car, you will need a pressure gauge and a refrigerant recharge kit. First, locate the low-pressure port on the AC system, usually found near the compressor. Attach the pressure gauge to the port and start the car with the AC on its highest setting. The gauge will show the current pressure level, which should be within the recommended range. If it is low, you can use the recharge kit to add more refrigerant. If you are unsure or uncomfortable doing this yourself, it is best to consult a professional mechanic.
To add refrigerant to your home AC system, you should first turn off the system and locate the service valves on the unit. Then, connect a refrigerant charging hose to the low-pressure service valve. Slowly open the valve on the refrigerant canister and allow the refrigerant to flow into the system. Monitor the pressure gauge to ensure you do not overfill the system. Once the correct amount of refrigerant has been added, close the valve on the canister and disconnect the hose. Restart your AC system and check for proper cooling.