Patent ID: 8164735

Claim:
A regulating device configured to regulate a temperature of a first medium in accordance with a target temperature, the regulating device comprising: a heat exchanger configured to perform a heat exchange between the first medium and a second medium; a control valve configured to control a flow rate of the second medium which flows into the heat exchanger; a first temperature sensor configured to detect a temperature of the second medium flowed out of the heat exchanger; a second temperature sensor configured to detect a temperature of the first medium flowed out of the heat exchanger; a third temperature sensor configured to detect a temperature of the second medium flowing into the heat exchanger; a fourth temperature sensor configured to detect a temperature of the first medium flowing into the heat exchanger; and a controller configured to calculate a target exchange heat quantity in the heat exchanger based on an output of the fourth temperature sensor and the target temperature, calculate an exchange heat quantity in the heat exchanger based on outputs of the third temperature sensor and the first temperature sensor and the flow rate of the second medium, add a signal dependent upon a difference between the target exchange heat quantity and the exchange heat quantity to a signal dependent upon a difference between an output of the second temperature sensor and the target temperature, and control the control valve so that a difference between the output of the second temperature sensor and the target temperature is reduced based on a signal obtained by the addition.