Refrigerant recovery and charging device

摘要

A servicing device is shown for recovering and charging refrigerant in a cooling system of the type having a compressor for circulating compressible refrigerant in a closed, pressurized system between a condenser and an evaporator to provide a cooling effect. The servicing device includes a storage container which has a fill port which is adapted to be connected by a fluid conduit to the closed, pressurized system being serviced. Heat exchange coils located within the container are cooled by a heat exchange system to create a low pressure atmosphere within the container and draw refrigerant from the closed, pressurized system into the container. The heat pump system has reversible valves to reverse the flow of auxiliary refrigerant being circulated through the system. When the refrigerant circulation is reversed, the heat exchange coils located within the storage container heats the container to create a relatively higher pressure atmosphere to charge refrigerant from the storage container into the closed, pressurized system.