Patent ID: 9733149
Date: 2017-08-15
CPC Classifications: A62C,B01D,G01M

Claim:
1. A method for determining and/or monitoring airtightness of an enclosed room equipped with an oxygen reducing system, the method comprising: i) providing fresh air from outside of the enclosed room as an initial gas mixture; ii) compressing the provided fresh air in a compressor system of the oxygen reducing system; iii) supplying the compressed fresh air to a gas separation system of the oxygen reducing system and separating at least a portion of oxygen contained in the fresh air in the gas separation system such that a nitrogen-enriched gas is provided at the outlet of the gas separation system; iv) introducing the nitrogen-enriched gas provided at the outlet of the gas separation system into the enclosed room; v) determining a pressure prevailing or set in the enclosed room in relation to an ambient air pressure to determine at least one differential pressure value; vi) comparing the at least one differential pressure value determined in method step v) to a corresponding reference value; vii) issuing an alarm when the comparison indicates that a difference between the at least one differential pressure value and the corresponding reference value is not within a preset tolerance range; and viii) configuring the oxygen reducing system in a fire prevention/extinguishing mode when the comparison indicates that the difference between the at least one differential pressure value and the corresponding reference value is within the preset tolerance range.