The invention relates to the field of fire extinguishers and discloses a passive trigger gas fire-extinguishing device for an
electric power machine room. The passive trigger gas fire-extinguishing device for the
electric power machine room comprises a high-pressure gas tank, an intake valve and an exhaust port. The left side of the top of the high-pressure gas tank is provided with the exhaust port, and a rotating
sprayer is arranged at the exhaust port. The rotating
sprayer is in an
elbow shape. One end of the rotating
sprayer is concentrically and rotationally connected with the exhaust port of the high-pressure gas tank, and a seal ring is arranged between the rotating sprayer and the exhaust port of the high-pressure gas tank. A
metal plug is plugged into the other end of the rotary sprayer, a gap exists between the first end of the
metal plug and an opening of the
elbow of the rotary sprayer, and the gap is filled with a fusible material. The
metal plug is connected with a connecting line. The bottom of the high-pressure gas tank is provided with the intake valve. One end of the intake valve is connected with a high-pressure
flame retardant gas bin through a gas guide
pipe, and the other end of the intake valve communicates with the high-pressure gas tank. The high-pressure gas tank is filled with high-pressure
flame retardant gas. A
pressure difference control valve capable of detecting the
pressure difference between the inside and the outside of the high-pressure gas tank is arranged on the right side of the top of the high-pressure gas tank. The passive trigger gas fire-extinguishing device for the
electric power machine room can rapidly and effectively conduct spontaneous fire extinguishing.