Patent ID: 6668571
Filing Date: 2003-12-30
Classification: F04B,F25B

Abstract:
A compressor of refrigerant medium for a home-type or similar refrigeration apparatus, driven by a motor (10) whose power supply frequency is selectively variable between a discrete number of values (f1, f2, fT) as a function of an input signal, characterized in that it integrally comprises control means (7) which are adapted to monitor two or more quantities that are variable with time in a mutually independent manner, of which at least one is representative of the actual operating conditions of the appliance, said control means being further adapted to generate said input signal with a value that corresponds to a preestablished combination of the monitored quantities,wherein the compressor also integrally comprises means for processing said input signal, which are from time to time adapted to privilege any of said time-variable quantities over the other ones as a function of the absolute value that such quantities take in a respective pre-set scale, and wherein one of said variable quantities is constituted by the utilization index of the driving motor (10) thereof.