Method for roasting coffee beans and roasting device

Abstract

The invention relates to a method for roasting coffee beans and a roasting device. The method comprises the following steps: (i) preheating a roasting chamber (10) to a predetermined preheating temperature, (ii) introducing a predetermined quantity of coffee beans into the roasting chamber (10) after reaching the preheating temperature, (iii) drying the coffee beans in a first phase, (iv) roasting the coffee beans in a second phase by initiating a Maillard reaction, and (v) roasting the coffee beans in a third phase. During the second and third phases of roasting the coffee beans, the volume concentration of at least one component of a roasting gas released from the coffee beans during roasting is determined continuously or at discrete time intervals.According to the invention, during the second and third phases of roasting the coffee beans, the rate of increase of the volume concentration of at least one component of the roasting gas is continuously determined from the time course of the volume concentration. Furthermore, a first time point at which the second phase transitions into the third phase is determined from the course of the rate of increase of the volume concentration of the at least one component of the roasting gas, wherein the first time point corresponds to a first maximum of the rate of increase.

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