Patent ID: 7040103

Claim:
A cooling system comprising a compressor fed electrically and controlled by control circuit for controlling said compressor, wherein said control circuit comprises: a measuring circuit for measuring an electric power supplied to the compressor; and a microcontroller, wherein a time variable (td) is stored in the microcontroller, and the measurement circuit effects a measurement of the electric power (P n ) supplied to the compressor, the microcontroller compares the measure of the electric power with a maximum temperature power variable (P rl ) and a minimum temperature power variable (P rd ) previously stored in the microcontroller, the minimum temperature power variable (P rd ) corresponding to the minimum temperature desired inside the refrigeration environment and the maximum temperature power variable (P rl ) corresponding to the maximum temperature desired inside the refrigeration environment, and the microcontroller alters the state of operation of the compressor as a function of the electric power (P n ) and of the time variable (td), wherein said compressors is selectively turned on and off by said microcontroller, wherein the on and off time of the compressor is varied based on the electric power absorbed by the compressor.