Energy-savings control system for showcases, refrigerators and freezers

摘要

An energy-savings control system can control the showcase, refrigerator and freezer so that they can run with the reduced energy consumption by responding to the electric current values flowing in each respective one of the showcase, etc. A freezing-machine is provided in each respective one of the showcase, refrigerator and freezer in which the electric current values flowing in the freezing-machine may be detected at time intervals of every one minute, and the average electric current values during the continuous time period of 30 minutes may be computed from the electric current values as detected above. If it is determined that the freezing-machine's operating rate as computed above is greater than the freezing-machine's predetermined operating rate, the freezing-machine installed therein may be controlled so that the electromagnetic valve can be switched to its opened position.