Abstract: To investigate the influence of different gas generator dosages and gas chamber volumes on the operational reliability of a gas-driven perfluorohexanone fire extinguishing device, this study references the technical requirements and testing methods outlined in relevant standards. The validation focuses on the injection time, injection process, and state of the fire extinguishing device with a charge amount of 0.8 kg of extinguishing agent. The research findings indicate that the activation of the safety release mechanism and suboptimal or ineffective injection of the extinguishing agent are primarily caused by a mismatch between the gas generator dosage and the gas chamber volume. It is essential to incorporate adequate safety margins when calculating the internal pressure of the fire extinguishing device to prevent failure in normal injection. Furthermore, consideration must be given to the heat generation of the gas generator to ensure that the theoretical calculations of internal pressure align closely with actual pressure values after activation of the fire extinguishing device. Consequently, adjusting the gas generator dosage and gas chamber volume based on the charge amount of the extinguishing agent can enhance the reliability of the fire extinguishing device and improve the atomization effect of the extinguishing agent, thereby achieving superior fire suppression performance

Key words: gas forming compound consumption, gas forming unit capacity, atomization, perfluorohexanone fire extinguishing device, safety relief device, burst pressure