Method and apparatus for controlling the composition of a gaseous mixture in a space.

摘要

The invention relates to a method for controlling the composition of a gas mixture present in a space (2,3) by detecting the concentration of at least one component of the gas mixture and extracting from the space and subjecting to a treatment at least a portion of the gas mixture, wherein the concentration of the at least one component is detected in the portion of the gas mixture extracted from the space. The invention also relates to an apparatus for performing this method provided with means connected to the space over a supply duct (12,13) and a discharge duct (5,6) gas mixture extracted from the space, control means connected for signal generating to the gas mixture treatment means, and means connected to the supply duct for detecting the concentration of at least one component of the gas mixture, which concentration detecting means are connected for signal generating to the control means (18). The described method and apparatus enable performing of concentration measurements at a central location without the necessity of having to install separate sample ducts.