Fire extinguisher

A fire extinguisher comprising:

• a pressure-source fluid container to retain compressed pressure-source fluid;
• an extinguishant container to retain extinguishant;
• a pressure-source fluid tube connected to the pressure-source fluid container and the extinguishant container, to lead the pressure-source fluid retained in the pressure-source container to the extinguishant container;
• a pressure reducing device intervening in the pressure-source fluid tube, to reduce pressure of pressure-source fluid flowing down the pressure-source fluid tube;
• a discharge device to discharge the extinguishant retained in the extinguishant container;
• an extinguishant tube connected to the extinguishant container and the discharge device, to lead the extinguishant retained in the extinguishant container to the discharge device;
• a down flow prevention device, intervening in the extinguishant tube, to prevent the pressure-source fluid from flowing down the extinguishant tube;
• and
• a gas supply tube connected to the pressure reducing device and a breathing apparatus.