| 摘要 |
This invention relates to a method by means of which it is possible, with highest possible precision and without any major expense, to determine the air tightness of an enclosed space, such space being particularly well suited to the use of the inert-gas fire extinguishing technology described above. Specifically, it introduces a method which, on demand and in effective yet easy-to-implement fashion, permits at any time the updated determination of the existing air tightness of the enclosed space without requiring a complex test series. To that effect, the first step according to the invention is to define a concentration gradient between the internal air atmosphere of an enclosed space and the ambient air atmosphere by setting the physical concentration of at least one constituent component of the space-internal air atmosphere, in particular of oxygen, at a value that differs from the physical concentration value of that minimum of one corresponding component in the ambient air atmosphere. This is followed by a determination of the concentration change rate in that, in the space-internal air atmosphere, the time-based change of the physical concentration of the minimum of one constituent component is measured. Finally, taking into account the previously determined concentration change rate, the air-tightness value of the enclosed space is calculated.
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