Assembly for temperature control of a fountain fluid and/or selected rolls of a printing press

Claim 1

An assembly for controlling temperature of a fountain fluid and of selected rolls of a printing press, comprising: a fountain-fluid circulating system for supplying a fountain-fluid reservoir; a cooling-fluid circulating system for supplying a roller-cooling mechanism with cooling fluid; each of said fountain-fluid and cooling-fluid circulating systems including a respective fountain-fluid and cooling fluid heat exchanging means for respectively exchanging heat between a refrigerant and the respective fountain fluid and cooling fluid in said fountain-fluid and cooling-fluid circulating systems; a refrigeration means, including a refrigerant circulating system, for supplying each of said fountain-fluid and cooling-fluid heat exchanging means with said refrigerant, said refrigerant flowing into refrigerant inputs and out of refrigerant outputs of said respective fountain-fluid and cooling-fluid heat exchanging means; and a means for selectively operating said fountain-fluid and cooling-fluid circulating systems individually and simultaneously; wherein said refrigerant circulating system is a closed-circuit system including a compressor means for driving said refrigerant therein, said compressor means being switchable between maximum and minimum outputs; and wherein a flow control valve is included between said refrigerant output of the cooling-fluid heat exchanging means and an input of said compressor means for controlling refrigerant flow for controlling, in an infinitely variable manner, refrigeration output to the cooling-fluid heat exchanging means between minimum and maximum levels.