Refrigerant amount management device and refrigerant amount management system

摘要

Disclosed is a refrigerant quantity management device that manages the quantity of a refrigerant applied to a refrigerant circuit formed by connecting to each other using piping: a heat source-side unit having a compressor, a heat source-side heat exchanger, and a supercooler; and at least one load-side unit having a load-side expansion valve and a load-side heat exchanger. The refrigerant quantity management device has: a temperature efficiency calculation unit, which regularly obtains temperature efficiency, and stores the temperature efficiency in a storage unit; and an output control unit having a function of displaying, on a display unit, information indicating the temperature efficiency during a set period stored in the storage unit.