Patent ID: 8499570

Claim:
A method of providing additive to a refrigerant circuit, the method comprising: connecting a pre-pressurized supply device to the refrigerant circuit at a portion of the refrigerant circuit where a circuit pressure is less than a supply device pressure that is a positive pressure above ambient pressure, the pre-pressurized supply device having (1) an outer container with an inner bag therein, (2) a valve interconnected with the inner bag, and (3) a volume of pressurized gas within an interior area of the pre-pressurized supply device that is pre-pressurized to the supply device pressure, the inner bag being pre-filled with a refrigerant system additive through the valve; and actuating the valve of the pre-pressurized supply device to allow the volume of pressurized gas within the interior area of the pre-pressurized supply device to force the refrigerant system additive to flow from the inner bag, through the valve, and into the refrigerant circuit, wherein the refrigerant system additive is not pre-mixed with refrigerant prior to the refrigerant system additive exiting the inner bag and entering the refrigerant circuit, such that a performance of the refrigerant circuit is maintained at a satisfactory level.