Fire suppression system and solid propellant aerosol generator for use therein

• US 20030062175A1
• Filed: 07/11/2002
• Published: 04/03/2003
• Est. Priority Date: 09/21/2001
• Status: Active Grant

• Current Assignee: Goodrich Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Universal Propulsion Co. (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Schall, Michael L., Olander, Donald E.
• Granted Patent: US 6,851,483 B2
• Time in Patent Office: Days
• US Class Current: 169/51
• CPC Class Codes: A62C 35/023 the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas for foam generation A62C5/02
• CPC Class Codes: A62C 35/08 Containers destroyed or opened by bursting charge
• CPC Class Codes: A62C 37/40 with electric connection between sensor and actuator
• CPC Class Codes: A62C 5/00 Making of fire-extinguishing materials immediately before use nozzles A62C31/02
• CPC Class Codes: A62C 5/006 Extinguishants produced by combustion
• CPC Class Codes: A62C 99/0045 using solid substances, e.g. sand, ashes; using substances forming a crust
• CPC Class Codes: G08B 25/002 Generating a prealarm to the central station
• CPC Class Codes: G08B 29/183 Single detectors using dual technologies G08B13/1672, G08B13/2448, G08B13/2494 take precedence
• CPC Class Codes: G08B 29/188 Data fusion; cooperative systems, e.g. voting among different detectors

Abstract

A fire suppression system for a substantially enclosed area comprises: a plurality of solid propellant aerosol generators disposed about the enclosed area for exhausting a fire suppressant aerosol that is substantially void of an ozone depleting material into the enclosed area. Each aerosol generator including an ignition element for igniting the solid propellant thereof. Each ignition element of the aerosol generators being coupled to a fire control unit which is operative to ignite the solid propellant of at least one aerosol generator utilizing the ignition element thereof to exhaust fire suppressant aerosol into the enclosed area. Each aerosol generator preferably includes a container which comprises: a housing including an orifice for exhausting the fire suppressant aerosol; a solid propellant disposed inside of the housing; at least one cover mounted to the housing to seal correspondingly at least one open side thereof; an ignition material coupled to the solid propellant for igniting the solid propellant to produce the fire suppressant aerosol; and at least one baffle disposed integral to the housing to capture non-usable effluent.

Claims

1. A solid propellant container for exhausting a fire suppressant aerosol, said container comprising:

a housing having at least one open side and including an orifice for exhausting said fire suppressant aerosol;

a solid propellant disposed inside of said housing;

at least one cover mounted to said housing to seal correspondingly said at least one open side thereof;

an ignition material coupled to said solid propellant for igniting said solid propellant to produce said fire suppressant aerosol; and

at least one baffle disposed integral to said housing to capture non-usable effluent.

2. The container of claim 1 wherein the housing has a substantially rectangular cross-section with opposing and adjacent side walls.

3. The container of claim 2 wherein the housing includes an opening at each side thereof;

and wherein each cover comprises a baffle to cover the corresponding opening and a cap mountable to the housing over the baffle.

4. The container of claim 3 wherein at least one cap includes an exhaust orifice for exhausting the aerosol.

5. The container of claim 1 wherein the at least one baffle comprises a metal sheet;

and wherein the solid propellant includes at least one sheet of extruded solid propellant mounted correspondingly to said metal sheet which in turn is mounted vertically to a side wall of the housing leaving a gap between the metal sheet and an adjacent side wall through which the aerosol is directed to the exhaust orifices.

6. The container of claim 5 wherein the housing has a substantially rectangular cross-section with opposing and adjacent side walls;

wherein a first side wall of the housing includes exhaust orifices;

wherein two metal sheet baffles are mounted to said first side wall, each metal sheet mounted substantially parallel to a corresponding adjacent side wall of said first side wall leaving a gap between the metal sheet and its corresponding adjacent side wall through which the aerosol is directed to the exhaust orifices of the first side wall.

7. The container of claim 6 wherein the exhaust orifices are disposed in the first side wall in areas between each baffle and the corresponding adjacent side wall.

8. The container of claim 6 wherein slots are provided in the first side wall;

and wherein the metal sheet baffles are mounted to the first side wall utilizing said slots.

9. The container of claim 1 wherein the ignition material comprises a strip of ignition material ignitable by an igniter.

10. The container of claim 9 wherein the cover includes an electrical connector connected to the strip of ignition material by at least one electrical lead for providing ignition current to the ignition material.

11. The container of claim 10 wherein the electrical connector, ignition material and electrical leads forming an ignition unit that has a 1-watt, 1-amp, no-fire characteristics.

12. The container of claim 1 wherein the housing is hermetically sealed.

13. The container of claim 1 wherein prior to ignition, the orifice is covered with hermetic seal.

14. The container of claim 1 wherein the solid propellant produces fire suppressant aerosol that is substantially void of an ozone depleting material.

15. A fire suppression system for a substantially enclosed area, said system comprising:

a plurality of solid propellant aerosol generators disposed about the enclosed area for exhausting a fire suppressant aerosol that is substantially void of an ozone depleting material into the enclosed area, each aerosol generator including an ignition element for igniting the solid propellant thereof; and

a fire control unit, each ignition element of said aerosol generators being coupled to said fire control unit which is operative to ignite the solid propellant of at least one aerosol generator utilizing the ignition element thereof to exhaust fire suppressant aerosol into the enclosed area.

16. The system of claim 15 wherein the fire control unit is disposed remotely from the plurality of aerosol generators.

17. The system of claim 15 wherein each of the aerosol generators include a multiplicity of orifices for exhausting the fire suppressant aerosol into the enclosed area.

18. The system of claim 15 wherein the enclosed area includes vented portions of a ceiling;

and wherein the aerosol generators are disposed at the vented portions of the ceiling for exhausting the fire suppressant aerosol through the vents and into the enclosed area.

19. The system of claim 15 wherein the fire control unit is operative to ignite aerosol generators of the plurality in a sequential manner.

20. The system of claim 15 wherein the fire control unit is operative to ignite selectively aerosol generators of the plurality.

21. The system of claim 15 wherein the fire control unit is operative to ignite selectively aerosol generators of the plurality to dispense a predetermined concentration of the fire suppressant aerosol into the enclosed area within a predetermined period of time.

22. The system of claim 15 wherein each ignition element comprises an electric ignition element;

and wherein the fire control unit is operative to ignite the solid propellant of at least one aerosol generator by activating electrically the ignition element thereof to exhaust fire suppressant aerosol into the enclosed area.

23. The system of claim 22 wherein each electric ignition element comprises at least one squib;

and wherein the fire control unit comprises a squib firing unit for activating each ignition element.

24. The system of claim 15 wherein the fire control unit includes a built in test function.

25. The system of claim 15 wherein the enclosed area is a cargo hold of an aircraft.

26. A fire suppression system for a plurality of substantially enclosed areas, said system comprising:

a plurality of solid propellant aerosol generators disposed about each enclosed area of the plurality for exhausting a fire suppressant aerosol that is substantially void of an ozone depleting material into at least one enclosed area, each aerosol generator including an ignition element for igniting the solid propellant thereof; and

a fire control unit for each enclosed area of the plurality, each fire control unit being coupled to the ignition elements of the aerosol generators of the corresponding enclosed area and is operative to ignite the solid propellant of at least one aerosol generator of the corresponding enclosed area utilizing the ignition element thereof to exhaust fire suppressant aerosol into the corresponding enclosed area.

27. The system of claim 26 wherein each fire control unit is disposed remotely from its corresponding enclosed area.

28. The system of claim 26 wherein each of the aerosol generators include a multiplicity of orifices for exhausting the fire suppressant aerosol into the corresponding enclosed area.

29. The system of claim 26 wherein each fire control unit is operative to ignite selectively aerosol generators of the plurality to dispense a predetermined concentration of the fire suppressant aerosol into the corresponding enclosed area within a predetermined period of time.

30. The system of claim 26 wherein each ignition element comprises an electric ignition element;

and wherein each fire control unit is operative to ignite the solid propellant of at least one aerosol generator by electrically activating the ignition element thereof to exhaust fire suppressant aerosol into the corresponding enclosed area.

31. The system of claim 30 wherein each electric ignition element comprises at least one squib;

and wherein each fire control unit comprises a squib firing unit for each ignition element.

32. The system of claim 26 wherein each fire control unit includes a built in test portion.

33. The system of claim 26 wherein each fire control unit is governed by a separate activation signal to ignite the solid propellant of at least one aerosol generator of the corresponding enclosed area.

34. The system of claim 33 wherein each separate activation signal is manually generated.

35. The system of claim 33 wherein each separate activation signal is generated in response to a detection of a fire in the corresponding enclosed area.

36. The system of claim 26 wherein the enclosed areas are cargo holds of an aircraft.