Sprinkler head

A sprinkler head comprising:

• a body having a nozzle that discharges a fire-extinguishing liquid;
• a valve cap that closes the nozzle;
• a heat-sensitive actuator that holds the valve cap in a state of closing the nozzle and that releases the closed state when decomposed and actuated;
• a disk-like deflector that sprinkles the fire-extinguishing liquid discharged from the nozzle outward in a direction intersecting an axis of the nozzle;
• and
• a support that supports the deflector, wherein
• a nozzle-side surface of the deflector has a recess extending from a portion around the support toward an outer edge of the deflector and recessed into the nozzle-side surface of the deflector, and
• first slits are provided on both sides of the recess in the width direction such that open ends thereof are adjacent to an outer edge of the recess,
• an entire outer circumferential edge of the recess is positioned on an inner side of a virtual outer circumferential circle of the deflector, the virtual outer circumferential circle being defined by a maximum radial extent of the deflector, and
• wherein the disk-like deflector has a circular shape.

A sprinkler head comprising:

• a body having a nozzle that discharges a fire-extinguishing liquid;
• a valve cap that closes the nozzle;
• a heat-sensitive actuator that holds the valve cap in a state of closing the nozzle and that releases the closed state when decomposed and actuated;
• a disk-like deflector that has a plurality of plate pieces arranged in a circumferential direction and a plurality of second slits provided between the plate pieces, and sprinkles the fire-extinguishing liquid discharged from the nozzle outward in a direction intersecting an axis of the nozzle;
• and
• a support that supports the deflector,
• wherein
• outer circumferential edges of the plurality of plate pieces define a virtual outer circumferential circle of the deflector,
• a nozzle-side surface of the deflector has a recess extending from a portion around the support radially outward toward the virtual outer circumferential circle of the deflector and recessed into the nozzle-side surface of the deflector,
• the deflector further has first slits, each located on a respective one of both sides of the recess in the width direction and having an open end adjacent to an outer circumferential edge of the recess,
• an entire outer circumferential edge of the recess is positioned on an inner side of the virtual outer circumferential circle of the deflector, and
• an outer edge of the valve cap is positioned to overlap an inner edge of the recess.