Patent ID: 8365836
Filing Date: 2013-02-05
Classification: A62C

Abstract:
1. Fire prevention equipment comprising: fire-extinguishing agent supplying equipment pressurizing and supplying a water-based fire-extinguishing agent via a pipe; an electrification spray head electrifying and spraying discharged particles of the water-based fire-extinguishing agent pressurized and supplied by the fire-extinguishing agent supplying equipment, the head being installed in a protection zone; and a voltage application unit applying an electrification voltage to the electrification spray head for electrification and spraying, wherein the electrification spray head has a small-particle-size head unit discharging the water-based fire-extinguishing agent having an average particle size within the range of 30 μm to 200 μm, and a large-particle-size head unit discharging the water-based fire-extinguishing agent having an average particle size within the range of 200 μm to 2000 μm, and the electrification spray head discharges a mixture of particles from the small-particle-size head unit and the large-particle-size head unit, wherein, in the electrification spray head, the small-particle head unit and the large-particle head unit are laterally arranged to be adjacent to each other; wherein the small-particle-size head unit has (i) a small-particle jetting nozzle converting the water-based fire-extinguishing agent into particles having the average particle size within the range of 30 μm to 200 μm by jetting the agent to external space so as to spray the particles, (ii) a water-current swirling core swirling a water current supplied to the jetting nozzle, (iii) an induction electrode unit disposed in a jetting space side of the jetting nozzle, and (iv) a water-side electrode unit disposed in the jetting nozzle so as to be in contact with the water-based fire-extinguishing agent; wherein the large-particle-size head unit has (i) a large-particle jetting nozzle converting the water-based fire-extinguishing agent into particles having the average particle size within the range of 200 μm to 2000 μm by jetting the agent to external space so as to spray the particles, (ii) a water-current swirling core swirling a water current supplied to the jetting nozzle, (iii) an induction electrode unit disposed in a jetting space side of the jetting nozzle, and (iv) a water-side electrode unit disposed in the jetting nozzle so as to be in contact with the water-based fire-extinguishing agent; and wherein the voltage application unit applies external electric fields generated by applying a voltage between the induction electrode units and the water-side electrode units of the small-particle-size head unit and the large-particle-size head unit to the water-based fire-extinguishing agent being subjected to a jetting process by the small-particle jetting nozzle and the large-particle jetting nozzle so as to electrify the jetted particles.