Device for regulating a mixing ratio of a gas mixture

A regulation device for regulating a mixing ratio of a gas mixture comprising a first gas and a second gas, the device comprising:

• a first conduit for carrying a flow of the first gas;
• a second conduit for carrying a flow of the second gas, the first and second conduits opening out into a common conduit in a mixing region to form the gas mixture;
• an adjusting device for adjusting the mixing ratio of the gas mixture;
• a first sensor configured to determine at least one thermal parameter of the gas mixture downstream from the mixing region;
• and
• a control device configured to receive, from the first sensor, sensor signals indicative of the at least one thermal parameter of the gas mixture and to derive control signals for the adjusting device based on the at least one thermal parameter,
• wherein the control device is configured to carry out the following procedure:
• setting the adjusting device to a reference state in which the flow of the second gas is interrupted while the flow of the first gas has a non-zero flow rate;
• receiving sensor signals from the first sensor, the sensor signals being indicative of at least one thermal parameter of the first gas in the reference state;
• setting the adjusting device to an operating state in which both the flow of the second gas and the flow of the first gas have non-zero flow rates;
• receiving sensor signals from the first sensor, the sensor signals being indicative of at least one thermal parameter of the gas mixture in the operating state;
• and
• deriving the control signals based on a comparison of the at least one thermal parameter of the gas mixture in the operating state and of the at least one thermal parameter of the first gas in the reference state.