| 摘要 |
The invention relates to a sprinkler comprising a holder body (3), at least one nozzle (2), a heat-activated release means (18) and a cover (13) which in a protective position is locked (14, 17) in front of said nozzle in order to protect the release means mechanically when the sprinkler is in an inactive mode and which is displaceable to a released position in which it keeps clear of the nozzle so that the release means is exposed and the nozzle can, after release of the release means, spray extinguishing medium when the sprinkler is in an active mode, the holder body comprising an inlet (5) for incoming extinguishing medium. In order for the sprinkler to be usable in surroundings where it may be heavily exposed to dirt and impurities and in order for it not to start spraying extinguishing medium when being exposed to heat with the cover (13) thereof being in the protective position, the sprinkler comprises a device (6) which is displaceable with respect to the holder body (3) and which is arranged under fluid pressure to be displaced with respect to the holder body and exert a force on the locking (14, 17) to make the locking open and consequently displace the cover to said released position to expose the release means (18) and place the sprinkler in a standby mode in which the release means (18) is intact so as to be able to react to heat and achieve a release of the sprinkler and place it in the active mode. |
