Patent ID: 7159518

Claim:
Tempering device for printing presses, comprising; a compression refrigerating plant with a condenser and an evaporator, in which a coolant circulates in a compression refrigerating path, a free cooling path, in which a coolant circulates, a process water path, in which a coolant circulates for one of: printing rollers, and a fountain solution for offset printing and a heat exchanger arrangement for cooling the process water path with the help of at least one of: the compression refrigerating plant and the free cooling path, the heat exchanger arrangement including a three-media heat exchanger, in which heat is exchanged between the process water path and the compression refrigerating plant as well as the free cooling path, wherein the three-media heat exchanger has two separate chambers including, on the one hand, a chamber through which the compression refrigerating path flows and which forms the evaporator of the compressor refrigerating plant, and on the other hand, a chamber through which the free cooling path flows, and the process water path passes through both chambers in separate pipe-line systems.