Patent ID: 7181920

Claim:
Cooling plant for a “cooled” fluid, able to cool and/or dry said “cooled” fluid by means of cooling substantially to a pre-established temperature, said plant comprising at least: a cooling unit comprising a cooling circuit, and a heat exchanger, to cool said “cooled” fluid, by heat exchange with a “cooling” fluid inserted in said cooling unit comprising said cooling circuit, said cooling circuit able to feed said cooling fluid to said heat exchanger, said cooling unit comprising at least: a condensation device, provided with a ventilator having a motor, and able to take said cooling fluid to within desired parameters of pressure and/or temperature, a compressor device able to put said cooling fluid in circulation inside said cooling circuit, an expansion device, disposed between said condensation device and said heat exchanger and able to reduce the pressure of said cooling fluid from a first value to a second value to maintain the ratio between the condensation pressure and the evaporation pressure of said cooling fluid substantially constant, and regulation means able to detect a variation in the temperature of the “cooled” fluid and to act on said condensation device to vary the parameters of pressure and/or temperature of said cooling fluid, wherein said regulation means comprises a detection element disposed inside said heat exchanger to detect the temperature of said fluid to be controlled, and a command device connected to said detection element and at least to said condensation device to increase, reduce or temporarily stop the rotation of said motor of said ventilator to vary the pressure/temperature of evaporation by varying the pressure/temperature of condensation, to keep the temperature of the fluid to be cooled at the constant value set.