Fire extinguishing system

#This application is the National Stage Entry under 35 U.S.C. § 371 of Patent Cooperation Treaty Application No. PCT/EP2014/073353, filed Oct. 30, 2014 which claims the benefit of EP Patent Application 13190809.7, filed Oct. 30, 2013, the contents of which are hereby incorporated by reference herein.

#The present invention relates to a fire extinguishing system comprising a pressurized detection conduit, an extinguishing line separate from the detection conduit, and a control module adapted for sensing a pressure drop in the detection conduit and for opening supply of extinguishing medium from a storage to the extinguishing line.

#A fire extinguishing system of this type may be used, e.g., in vehicle engine compartments. A detection conduit of the extinguishing system is normally located in the upper part of the engine compartment and in the event of fire in the engine compartment the detection conduit bursts due to heat generated by the fire. It is realised that such a fire extinguishing system is exposed to a wide range of temperature conditions.

#The invention will now be described in more detail with reference to the appended drawings in which:

#FIG. 1 is a schematic perspective view of a fire extinguishing system according to an embodiment of the present disclosure.

#FIG. 2 shows a part of the fire extinguishing system of FIG. 1.

#FIG. 1 illustrates a fire extinguishing system 1 according to an embodiment of the present disclosure. The fire extinguishing system 1 may e.g. be installed in the engine compartment 4 of a vehicle (not shown), as schematically illustrated in FIG. 1. On release of the extinguishing system 1 extinguishing liquid in the form of atomised mist is sprayed in the engine compartment 4 to cool and extinguish the fire.

#The extinguishing system 1 comprises a pressure container 3 for extinguishing liquid, a control module in the form of a release valve 5, an extinguishing line 8 and a detection system 11. The extinguishing line 8 comprises several nozzles 7 and a piping system 9. The detection system 11 comprises a pressurized liquid-filled detection conduit 15. Each of the extinguishing line 8 and the detection conduit 15 is connected to the release valve 5.

#The pressure container 3 is of a design known per se and forms two chambers, a first chamber for extinguishing liquid and a second chamber for a driving gas. The pressure container chambers are separated from each other by means of a piston displaceably arranged in the pressure container 3 and sealed with regard to the cylindrical wall by means of sealing rings. On delivery the extinguisher container 3 is filled with extinguishing fluid and drive gas to approximately 105 bars.