Patent ID: 8413735

Claim:
Fire prevention equipment comprising: fire-extinguishing agent supplying equipment for pressurizing and supplying a water-based fire-extinguishing agent via a pipe; an electrification spray head for electrifying jetted particles of the fire-extinguishing agent pressurized and supplied by the fire-extinguishing agent supplying equipment and spraying the particles, the head being installed in a protection section; and a voltage application unit for applying an electrification voltage to the electrification spray head, wherein the electrification spray head is provided with an injection nozzle for converting the water-based fire-extinguishing agent to particles and spraying the particles by jetting only the water-based fire-extinguishing agent to external space, an induction electrode unit disposed in a jetting space side of the injection nozzle, and a water-side electrode unit disposed in the injection nozzle and brought into contact with the water-based fire-extinguishing agent, and wherein the voltage application unit charges the jetted particles by applying an external electric field generated by applying a voltage between the induction electrode unit and the water-side electrode unit of the electrification spray head to the water-based fire-extinguishing agent in a jetting process from the injection nozzle.