System for extinguishing or inerting having a synthetic liquid extinguishing agent

Patent metadata

Field	Value
Publication number	US-9387352-B2
Application number	US-201213671705-A
Country	US
Kind code	B2
Filing date	Nov 8, 2012
Priority date	Nov 18, 2011
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

A system for extinguishing and/or inerting, including an extinguishing-agent tank, a conveyor device for an extinguishing agent, a pipeline, and nozzles. A synthetic liquid extinguishing agent ( 12 ) is stored at low pressure of up to 3 bar relative to 21° C. in the extinguishing-agent tank ( 1 ) and at least one incidence sensor detects fire signals and reports them to a fire detection panel and/or control panel ( 9 ) which activates the conveyor device ( 4 ) that conveys the synthetic liquid extinguishing agent by means of a pipeline ( 5 ) to nozzles ( 6 ), and the liquid extinguishing agents transitions into the gas phase after leaving the nozzles ( 6 ). The system represents a more cost-effective system that requires less technical efforts in comparison to previous systems having synthetic liquid extinguishing agents.

First claim

The invention claimed is:

1. A system for extinguishing a fire and/or inerting a space to reduce a risk of a fire, comprising
an extinguishing-agent tank ( 1 ), a pump ( 4 ) in communication with the extinguishing agent tank for conveying a synthetic extinguishing agent through a pipeline ( 5 ) and to a plurality of nozzles ( 6 ), a fire detection or control panel ( 9 ) is provided for selectively controlling the pump ( 4 ) in response to an incidence sensor ( 8 ), that detects fire signals and reports them to the fire detection panel or control panel ( 9 ), and at least one concentration sensor ( 7 ) in the space wherein
the extinguishing-agent tank ( 1 ) contains the synthetic extinguishing agent Begin at a pressure which equals the vapor pressure of the synthetic extinguishing agent up to 3 bar and the pipeline ( 5 ) is designed for a pressure level of up to 16 bar,
on the extinguishing-agent tank ( 1 ), a dehumidifier ( 3 . 1 ) and a pressure protection mechanism ( 3 . 2 ) are arranged,
the pump ( 4 ) is arranged between the extinguishing-agent tank ( 1 ) and the nozzles ( 6 ) in the pipeline ( 5 ), and effective to convey the liquid synthetic extinguishing agent to the nozzles without pressure increase to the tank,
an electrical line ( 10 ) is arranged between the pump ( 4 ) and the fire detection panel or control panel ( 9 ), the line being monitored for wire breakage and/or a short circuit,
wherein the concentration sensor ( 7 ) measures one of a current oxygen or extinguishing agent concentration and reports a signal to the fire detection panel or control panel ( 9 ), and
the fire detection panel or control panel ( 9 ) controls the discharge of the amount of extinguishing agent via the pump ( 4 ) according to a predetermined value or limit value of the measured one of a current oxygen or extinguishing agent concentration as a controlled variable for the amount of fire extinguishing agent to be discharged.

2. The system according to claim 1 , wherein the extinguishing-agent supply via the pump ( 4 ) is turned on by the at least one incidence sensor ( 8 ).

3. The system according to claim 1 , wherein the synthetic liquid extinguishing agent represents a non-combustible, inflammable, electrically non-conducting liquid having a vapor pressure of 0.1 to 3 bar at 21° C.

4. The system according to claim 3 , wherein the liquid synthetic extinguishing agent exhibits a density of 1,400 kg/m 3 to 1,800 kg/m 3 at 21° C.

5. The system according to claim 1 , wherein the liquid extinguishing agent is FK-5-1-12 (C 4 F 9 OCH 3 ) or a fluoro ketone.

6. The system according to claim 1 , wherein the extinguishing-agent tank ( 1 ) represents a closed extinguishing-agent tank ( 1 ) that is made of plastic or metal.

7. The system according to claim 1 , wherein a liquid-level monitoring system ( 2 ) is arranged in the extinguishing-agent tank ( 1 ).

8. The system according to claim 1 , wherein an electrically or pneumatically operated pump is arranged as the pump ( 4 ).

9. The system according to claim 8 , wherein several pumps ( 4 ) are arranged between the extinguishing-agent tank ( 1 ) and nozzles ( 6 ).

10. The system according to claim 1 , wherein a selector valve ( 11 ) is arranged between the pump ( 4 ) and the nozzles ( 6 ).

11. The system according to claim 1 , wherein the liquid-level monitoring system ( 2 ) is connected to the fire detection panel or control panel ( 9 ).

12. The system according to claim 1 , wherein an automatic or a manual fire detector is arranged as the incidence sensor ( 8 ).

Assignees

• Minimax Gmbh & Co Kg

Inventors

• Habitzl Wolfgang

Classifications

• A62C37/16

  with thermally-expansible links · CPC title

• A62C35/02 Primary

  with containers for delivering the extinguishing substance · CPC title

• A62C3/00 Primary

  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