HEAT-MEDIUM HEATING/COOLING APPARATUS, AND HEAT-MEDIUM TEMPERATURE CONTROL METHOD

摘要

Provided are a heat-medium heating/cooling apparatus and a heat-medium temperature control method, which can stabilize the temperature control of a heat medium more efficiently. The heat-medium heating/cooling apparatus comprises a bypass passage (19) bypassing a heat-medium heating unit (12) disposed in the apparatus, and changeover valves (20a and 20b) for changing over the flow of the heat medium to the heat-medium heating unit and the bypass passage. The decision is made on the basis of the present temperature (PV) in a reaction bath (11), a preset target temperature (SV), a stable temperature width (a) and a control changeover temperature (ß). On the basis of the four decision results of "stable heating", "stable cooling", "inclined heating" and "inclined cooling", the temperature control is made according to either the heating control by a heating control unit or the cooling control by a cooling control unit.