Water mist protection for forced ventilation interstitial spaces

Patent metadata

Field	Value
Publication number	US-11986689-B2
Application number	US-202117548954-A
Country	US
Kind code	B2
Filing date	Dec 13, 2021
Priority date	Feb 14, 2015
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

Water mist fire protection systems and methods for the protection of data centers having a raised floor defining an interstitial space beneath the floor. The systems and methods include the location of a plurality of automatic water mist nozzles above and/or beneath the floor to generate a water mist for effectively addressing a fire in the presence of a flow of forced air ventilation through the interstitial space. The systems and methods of water mist fire protection include the interconnection of the automatic water mist nozzles to a water supply to provide for dry pipe or preaction systems and methods. Water mist fire protection of data cen-ters using fire propagating cable is also provided.

First claim

What is claimed is:

1. A fire protection system, comprising:
a plurality of upright fire protection devices disposed in an interstitial space having an upper side and a lower side, the plurality of upright fire protection devices spaced apart in a spacing of at least 6 feet by 6 feet, each upright fire protection device having a working pressure of 110 pounds per square inch (psi) to 250 psi, each upright fire protection device comprising:
a body comprising an inlet to receive water, an outlet, a passageway between the inlet and the outlet, and a pair of frame arms about the outlet that converge to an apex;
a seal in the outlet;
a thermally responsive trigger coupled with the seal, the thermally responsive trigger comprising a glass bulb, the thermally responsive trigger having a temperature rating greater than or equal 175 degrees Fahrenheit and less than or equal to 200 degrees Fahrenheit, the thermally responsive trigger having a response time index less than or equal to 50 (meters-seconds) 1/2 ; and
a diffuser spaced from the outlet by the pair of frame arms and coupled with the apex, the diffuser comprising a planar member, wherein the planar member comprises a flat plate having a plurality of tines at a periphery of the planar member, a distance from the diffuser to a structure of the upper side of the interstitial space is less than or equal to 4 inches.

2. The fire protection system of claim 1 , comprising:
the thermally responsive trigger is a quick response glass bulb.

3. The fire protection system of claim 1 , comprising:
the periphery of the diffuser is circular.

4. The fire protection system of claim 1 , comprising:
a compression screw between the diffuser and the thermally responsive trigger.

5. The fire protection system of claim 1 , comprising:
an ejection spring coupled with the seal.

6. The fire protection system of claim 1 , comprising:
an orifice insert in the passageway.

7. The fire protection system of claim 1 , comprising:
a control valve coupling the plurality of upright fire protection devices with a water supply; and
a controller to actuate the control valve responsive to a detection signal from one or more fire detectors.

8. The fire protection system of claim 1 , comprising:
the plurality of upright fire protection devices comprise at least four upright fire protection devices in a design area.

9. The fire protection system of claim 1 , comprising:
the diffuser comprises a plurality of slots defined between pairs of tines of the plurality of tines.

10. A fire protection system, comprising:
a plurality of nozzles arranged in an interstitial space having an upper side and a lower side, a distance between the upper side and the lower side is less than or equal to 16.4 feet (5.0 meters), each nozzle having a working pressure of 110 pounds per square inch (psi) to 250 psi, each nozzle comprising:
an inlet;
an outlet;
a passageway between the inlet and the outlet;
a pair of frame arms about the outlet;
a seal in the outlet;
a thermally responsive trigger comprising a glass bulb coupled with the seal, the thermally responsive trigger having a temperature rating greater than or equal 175 degrees Fahrenheit and less than or equal to 200 degrees Fahrenheit, the thermally responsive trigger having a response time index less than or equal to 50 (meters-seconds) 1/2 ; and
a planar member spaced from the outlet by the pair of frame arms, the planar member comprising a flat plate having a plurality of tines extending to a periphery of the planar member, a distance from the planar member to a structure of an upper side of the interstitial space is less than or equal to 4 inches, the planar member of each nozzle spaced from a respective planar member of an adjacent nozzle by at least 6 feet.

11. The fire protection system of claim 10 , comprising:
the periphery is circular.

12. The fire protection system of claim 10 , comprising:
a compression screw between the planar member and the thermally responsive trigger.

13. The fire protection system of claim 10 , comprising:
an ejection spring coupled with the seal.

14. The fire protection system of claim 10 , comprising:
an orifice insert in the passageway.

15. The fire protection system of claim 10 , comprising:
a control valve coupling the plurality of nozzles with a water supply; and
a controller to actuate the control valve responsive to a detection signal from one or more fire detectors.

16. The fire protection system of claim 10 , comprising:
each nozzle is an upright nozzle such that the planar member of each nozzle is above the passageway of each nozzle.

Assignees

• Tyco Fire Products Lp
• Lpg Tecn En Extincion De Incendios S L

Inventors

• Cutting Sean E
• Bosch Alex Palau

Classifications

• A62C3/16 Primary

  in electrical installations, e.g. cableways · CPC title

• A62C3/00

  Fire prevention, containment or extinguishing specially adapted for particular objects or places ({in oil wells E21B29/08, A62C35/00; in mines or tunnels E21F5/00} ; for nuclear reactors G21C9/04) · CPC title

• A62C35/58

  Pipe-line systems · CPC title

• A62C99/0072

  using sprayed or atomised water · CPC title

• H02G3/0412

  Heat or fire protective means (for fire in electric circuits A62C3/16) · CPC title