| 摘要 |
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. |
