Sprinkler system
AssigneeAktiebolaget Bofors
InventorLennart Claussen
Life of this patent
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Abstract
The present invention relates to a method of and a device for automatically releasing all or a predetermined number of sprinker heads comprised in a fire protection circuit when one of the heads (11) has been released by a local fire or a rise in temperature in the immediate vicinity of this particular head. The invention is based upon a flow detector arranged in the trunk pipe for the fire extinguishing fluid which when said fluid begins to flow through the trunk pipe, i.e. when at least one sprinkler head has opened, closes an electric ignition circuct (17-21, 25-27) which connects pyrotechnical activators arranged at the respective sprinkler heads with an electric ignition function controller (12), whereby the blocking devices at the outlets of the other sprinkler heads are blown away.
Claims10
A method of releasing fire extinguishing fluid from a plurality of normally blocked sprinkler heads connected for receiving fire extinguishing fluid from a trunk conduit, comprising the steps of:
- releasing a first portion of said sprinkler heads to direct said fluid at a fire;
- detecting the beginning of flow of said fluid to said first portion of said sprinkler heads;
- generating an electrical control signal in response to detecting said beginning of flow;
- and
- in response to said control signal, releasing a further portion of said sprinkler heads to direct said fluid at a fire.
Apparatus for extinguishing fires, comprising:
- a plurality of normally blocked sprinkler heads;
- a conduit network connecting said heads for receiving fire extinguishing fluid from a trunk conduit;
- means for releasing a first portion of said sprinkler heads to direct said fluid at a fire;
- means for detecting the beginning of flow of said fluid to said first portion of said sprinkler heads;
- means for generating an electrical control signal in response to detecting said beginning of flow;
- and
- means for releasing, in response to said control signal, a further portion of said sprinkler heads to direct said fluid at a fire.
Dependencies are inferred from the claim text.