METHOD OF CONTROL OVER GAS FIRE EXTINGUISHING SUBSTANCE MASS IN CYLINDER OF GAS FIRE EXTINGUISHING MODULE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2009 - IPC A62C39/00 F17C13/02 G01M3/32 

FIELD: fire extinguishing equipment.

SUBSTANCE: group of inventions is proposed including method and device to control the mass of gaseous fire extinguishing substance (GFES), containing carbonic acid, in a cylinder of a gas fire extinguishing module. The method involves introducing nitrogen in the amount of 5-7% of the carbonic acid weight to the cylinder with the carbonic acid, then a measurement instrument is calibrated, contact of the measurement instrument sensor with the GFES is provided for and current pressure of compressed or liquefied gas mixture in the cylinder as well as current temperature of the gas mixture in the cylinder are measured. Afterwards with the help of a microprocessor the current values of gas mixture pressure in the cylinder are compared to the calibrated pressure values depending on the measured current temperature of the gas mixture in the cylinder. The comparison results help evaluating the losses of GFES due to its leakage from the cylinder depending on the measured temperature. In case the revealed value of the GEFS losses exceeds a certain specified value, a warning signal is produced for restoring the operability of the gas fire extinguishing module. The above method can be implemented by a special device for the control over the GEFS mass in the cylinder of the gas fire extinguishing module. It comprises a unit with a metering device to supply nitrogen to the cylinder, a measurement instrument with a pressure sensor for compressed or liquefied gas mixture in the cylinder which is contacting the GEFS, a temperature sensor for the compressed or liquefied gas mixture in the cylinder, a microprocessor with a memory block to store calibration data of the pressure sensor signals, and a signaling device. The microprocessor is electrically connected to the pressure sensor, temperature sensor and signaling device.

EFFECT: providing for reliable control of GEFS leakage up to 5% of the filled amount, improving reliability of the gas fire extinguishing module operation, increasing its workability, reducing manufacturing costs and improving operation conditions due to simplifying GEFS mass control device design, increasing fire extinguishing efficiency due to providing for fire extinguishing system homogenisation.

2 cl, 1 dwg, 2 tbl