Extinguishing method and system using a liquid synthetic extinguishing agent and water

Patent metadata

Field	Value
Publication number	US-10363445-B2
Application number	US-201515111948-A
Country	US
Kind code	B2
Filing date	Jan 9, 2015
Priority date	Jan 17, 2014
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

A method for extinguishing objects or appliances, in which, once a fire signal has been detected at point in time t1, a first device (17) providing an extinguishing agent is triggered, for discharging a liquid synthetic extinguishing agent (14), via a separating device (8), a common conveying pipe (9) and at least one nozzle (10), and, once a second fire signal has been detected at point in time t2, a second device (18) providing an extinguishing agent is triggered for discharging water (3) or a water-based extinguishing agent via the separating device (8), the common conveying pipe (9) and the at least one nozzle (10) for extinguishing. A system is also provided for extinguishing objects or appliances.

First claim

The invention claimed is:

1. A method for extinguishing objects or devices, comprising the following method steps preferably carried out in succession:
(a) detecting a first fire signal of a fire characteristic by at least one event detector ( 11 ) and at least one of a fire alarm or an extinguishing control panel ( 12 ), at the time t 1 ,
(b) actuating a first extinguishing agent supply device ( 17 ) by the at least one of a fire alarm or an extinguishing control panel ( 12 ) for discharging a liquid synthetic extinguishing agent ( 14 ) by way of a common pipe ( 9 ) and at least one nozzle ( 10 ),
(c) detecting a second fire signal of the fire characteristic at the time t 2 and
(d) actuating a second extinguishing agent supply device ( 18 ) and delivering one of a water ( 3 ) or a water-based extinguishing agent via the common pipe ( 9 ) and at least one nozzle ( 10 ) for extinguishing purposes,
wherein the discharge of the liquid synthetic extinguishing agent ( 14 ) and the delivery of the water ( 3 ) or the water-based extinguishing agent is carried out by a separation apparatus ( 8 ) and wherein, furthermore, there is an actuation of the separation apparatus ( 8 ) by the at least one of a fire alarm or an extinguishing control panel ( 12 ), prior to method step (b), for generating a switching position, which releases a transport path of the liquid synthetic extinguishing agent ( 14 ) in the direction of the common pipe ( 9 ) and the at least one nozzle ( 10 ) and completely blocks the transport path of the one of a water ( 3 ) or the water-based extinguishing agent from the second extinguishing agent supply device ( 18 ) in the direction of the common pipe ( 9 ) and the at least one nozzle ( 10 ) and there is an actuation of the separation apparatus ( 8 ) by the at least one of a fire alarm or an extinguishing agent control panel ( 12 ), prior to method step (d) and complete discharge of the liquid synthetic extinguishing agent ( 14 ), for generating a switching position of the separation apparatus ( 8 ) which releases the transport path of the at least one of a water or the water based extinguishing agent ( 3 ) in the direction of the common pipe ( 9 ) and the at least one nozzle ( 10 ) and completely blocks the transport path of the liquid synthetic extinguishing agent ( 14 ) from the first extinguishing agent supply device ( 17 ) in the direction of the common pipe ( 9 ) and the at least one nozzle ( 10 ).

2. The method as claimed in claim 1 , wherein there is purging of the common pipe ( 9 ) and of the at least one nozzle ( 10 ) with a gas after method step (b) of claim 1 .

3. The method as claimed in claim 1 , wherein the volumetric flow of the synthetic extinguishing agent ( 14 ) emerging from the nozzle ( 10 ) is formed as a target-directed extinguishing agent jet with the geometry of a cone such that the synthetic extinguishing agent remains largely liquid in the center of the cone until the synthetic extinguishing agent reaches the action zone.

4. The method as claimed in claim 1 , wherein the time t 2 after the complete discharge of the extinguishing agent container ( 1 ) lies after the expiry of a discharge time t c but within a monitoring duration t b , wherein the monitoring duration b is the sum of the discharge time t c and a checking time t k starting from the time t 1 , where the checking time t k follows the discharge time t c , and furthermore comprising the following step:
examining whether a fire signal is detected during the time t k , in particular by the fire alarm and/or extinguishing control panel ( 12 ), and whether the inequality (t 1 +t c )<t 2 <(t 1 +t b ) is satisfied at the time t 2 .

5. The method as claimed in claim 1 , wherein the liquid synthetic extinguishing agent ( 14 ) constitutes a non-flammable, non-ignitable, electrically non-conductive liquid with at least one of a vapor pressure of 0.1 to 3 bar at 21° C. or a density of 1400 kg/m3 to 1800 kg/m3 at a temperature of 21° C.

6. The method as claimed in claim 1 , wherein the liquid synthetic extinguishing agent ( 14 ) constitutes one of an FK-5-1-12(C 4 F 9 OCH 3 ) or a fluoro ketone.

Assignees

• Minimax Gmbh & Co Kg

Inventors

• Boeke Joachim
• Habitzl Wolfgang
• Bechtloff Volker

Classifications

• A62C35/11

  controlled by a signal from the danger zone · CPC title

• A62C35/026

  the extinguishing material being put under pressure by means other than pressure gas, e.g. pumps · CPC title

• A62C35/13 Primary

  with a finite supply of extinguishing material · CPC title

• A62C99/0018

  using gases or vapours that do not support combustion, e.g. steam, carbon dioxide · CPC title

• G08B17/00

  Fire alarms; Alarms responsive to explosion · CPC title