Fire extinguishers – Fluid systems – Distributing systems
Patent
1998-04-08
1999-11-30
Kashnikow, Andres
Fire extinguishers
Fluid systems
Distributing systems
16 5, 16 9, A62C 3500
Patent
active
059925302
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an installation for fighting fire in a space, the installation including a spray head of such a type that it is capable of producing extinguishing medium in the form of a finely divided liquid mist with a great penetrating ability and a simultaneous suction near the spray head.
2. The Prior Art
Such installations are known from the publications WO 92120453, WO 92/22353 and WO 94/16771. These known installations have proved to function very well for fire extinguishing. To prevent the drop size of the extinguishing liquid from becoming too large, an installation in which gas is mixed into the extinguishing liquid has been disclosed in WO 94/08659. As a result of the intermixing of gas, it has been possible to keep the drop size comparatively small during the emptying of an hydraulic accumulator.
Some spaces, such as rooms for computers and other machines, contain, in addition to expensive machines, bundles of electric cables, which in the event of a fire cause great damage. The electric cables typically have a plastic mantle of PVC. If a fire breaks out in such a room and the cables catch fire, poisonous fumes are formed and these fumes are not only dangerous to humans but also destroy sensitive machines, such as computers. Known installations for extinguishing such fires are not capable of rapidly extinguishing a fire with a small amount of water. The use of something else than a water-based extinguishing medium, e.g. halogen, for extinguishing produces chemicals that are harmful to the surrounding, wherefore the use of a water-based extinguishing medium is to be preferred. It is important that the quantity of water used for extinguishing a fire is not large, since the water damages can then be kept small.
The present invention relates to a new installation which has, if desired, a simple construction and with which a fire in a space, e.g. a room, can be extinguished very efficiently so that the smoke gases and fumes are purified and the amount of extinguishing liquid used can be very small at the same time.
SUMMARY OF THE INVENTION
For this object, the installation according to the invention is principally characterized in that the spray head is arranged in a pipe with a suction opening at a distance of 1 to 10 m from the floor level of the space and a spray opening near the floor level, whereby the spray head is arranged to spray in the direction from the suction opening to the spray opening to create a suction in the suction opening.
To achieve a better effect in larger spaces, the pipe preferably constitutes part of a pipe system comprising a plurality of spray openings for spraying extinguishing medium in the form of mist out of the pipe system at least essentially along the floor, and a plurality of suction openings, whereby the further pipe system has a first elongated pipe section and a second elongated pipe section, and an intermediate pipe section which connects the first elongated pipe section with the second elongated pipe section, whereby the spray openings are arranged in the second elongated pipe section in the longitudinal direction thereof and the suction openings are arranged in the first elongated pipe section in the longitudinal direction thereof, whereby the second elongated pipe section is arranged near the floor level of the room and the first elongated pipe section is arranged at a distance of 1 to 10 m above the floor level.
In large spaces, the installation preferably comprises a further pipe system arranged at a distance from the pipe system so that the pipe systems are placed near the opposite walls of the space. The fumes are as a result efficiently sucked out without any intermixing of the fumes taking place in the space. To effect smoke suction and fire extinguishing in a room with a sub-floor, the installation further comprises a pipe net arranged in the subfloor, whereby at least one spray head has been arranged in said pipe net to spray extinguishing medium in the form of mist into th
REFERENCES:
patent: 2586797 (1952-02-01), Dunlop et al.
patent: 4091874 (1978-05-01), Monma
patent: 4401165 (1983-08-01), Gutermuth et al.
patent: 5702299 (1997-12-01), Sundholm
International Publication No. WO 94/26356, dated Nov. 24, 1994, to G. Sundholm entitled, "Method and Installation for Removing Smoke from a Monitored Space".
International Publication No. WO 93/21997, dated Nov. 11, 1993, to G. Sundholm entitled, "Installation for Fighting Fire".
Evans Robin O.
Kashnikow Andres
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