ENERGY-SAVINGS CONTROL SYSTEM FOR SHOWCASES, REFRIGERATORS AND FREEZERS.

摘要

An energy-savings control system is disclosed, wherein the energy-savings control system can control the showcase, refrigerator and freezer (which may be referred to herein as the showcase, etc. unless they are mentioned specifically.) 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., the goods selling department�s temperature enthalpy and any change in the ambient environment such as the external temperature. 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, thereby computing the freezer�s operating rate. If it is determined that the freezing-machine�s operating rate as computed above is greater than the freezing- machine�s predetermined operating rate by a certain value and that the temperature inside each respective one of the showcase, etc. in which the freezing-machine is installed exceeds the predetermined temperature range, the electromagnetic valve mounted in each respective one of the showcase, etc. having the freezing-machine installed therein may be controlled so that the electromagnetic valve can be switched to its opened position.