CONTROL SYSTEM OF REFRIGERATING AND FREEZING

摘要

A control device for a refrigerating and freezing system is provided to keep freshness and control overcooling by controlling frequency ranges of electric fields, thereby keeping foodstuff for a long time. A control device for a refrigerating and freezing system includes electrode modules having positive and negative polarities(100a,100b) facing each other, and an electric field applying module(200) for applying voltages to the positive and negative polarities to form electric fields having two or more frequency ranges between the positive and negative polarities, and controlling frequency ranges of the applied voltages. The electric field applying module has a first vibration part(210) for generating a voltage in a first frequency range of 1kHz-10MHz, a second vibration part(220) for generating a voltage in a second frequency range of 1kHz or lower, and a waveform conversion part(230) for mixing or converting the voltages in the first and second frequencies to generate electric fields for restraining microorganism growth and oxidation.