| 摘要 |
PROBLEM TO BE SOLVED: To provide a sprinkler fire-extinguishing apparatus capable of quickly detecting the actuation of a sprinkler head and starting fire extinguishing at early stage with a simple configuration, regarding a pre-operation type sprinkler fire-extinguishing apparatus which prevents leakage of water from a pipeline by usually setting the interior of a secondary side pipeline to negative pressure.SOLUTION: In a pre-operation type sprinkler fire-extinguishing apparatus in which a secondary side piping is usually set to negative pressure, a sprinkler head is provided with a concealed part to be dropped by heat of a fire and drop detection means for the concealed part. The apparatus includes a control part for controlling a pre-action value to open when both of fire detection means provided on a protection section of the sprinkler head and the concealed part drop detection means are operated. |
