Enhanced protection extended coverage pendent fire protection sprinkler
View Patent ↗An enhanced protection extended coverage pendent fire protection sprinkler has a body including a fluid passage and an output orifice sealed with a seal cap, two arms extending from the body and meeting at a hub, a release mechanism with a thermally-responsive element positioned between the seal cap and the hub, and a deflector positioned on the hub and facing the output orifice. The deflector includes a pair of aligned slots, aligned with a plane of the arms, and a pair of perpendicular slots, perpendicular to the aligned slots and having a width that is less than that of the aligned slots. The deflector further includes a pair of corner slots, positioned between the aligned slots and the perpendicular slots. Angled slots are positioned between the aligned slots and the corner slots and between the perpendicular slots and the corner slots.
1. A pendent fire protection sprinkler, comprising a deflector that includes:
a pair of aligned slots having a width and being aligned in a first direction,
a pair of perpendicular slots, perpendicular to the first direction and having a width that is less than the width of the aligned slots,
a pair of corner slots, positioned between the aligned slots and the perpendicular slots,
a first plurality of angled slots, positioned between the aligned slots and the corner slots, and
a second plurality of angled slots, positioned between the perpendicular slots and the corner slots.
2. The pendent fire protection sprinkler of claim 1 , wherein the aligned slots have a width of between about 0.06 and about 0.10 inches.
3. The pendent fire protection sprinkler of claim 1 , wherein the perpendicular slots have a width of between about 0.05 and about 0.07 inches.
4. The pendent fire protection sprinkler of claim 1 , wherein the aligned slots have a radial length less than that of the perpendicular slots.
5. The pendent fire protection sprinkler of claim 1 , wherein the first plurality of angled slots have a radial length greater than that of the second plurality of angled slots.
6. The pendent fire protection sprinkler of claim 1 , wherein the sprinkler achieves an actual delivered density of at least about 6.0 mm/min over a design area of 160 m 2 .
7. The pendent fire protection sprinkler of claim 1 , wherein the sprinkler achieves an actual delivered density of at least about 6.5 mm/min over a design area of 160 m 2 .
8. The pendent fire protection sprinkler of claim 1 , wherein the deflector comprises a flat, circular disk.
9. The pendent fire protection sprinkler of claim 1 , wherein the deflector comprises a circular disk, with a planar central portion and edges that are angled in a direction away from an output orifice of the sprinkler.
10. The pendent fire protection sprinkler of claim 9 , wherein the central portion has a radius of about 0.4-0.9 inches.
11. The pendent fire protection sprinkler of claim 9 , wherein the edges form an angle of about 5°-30° with respect to the central portion.
12. The pendent fire protection sprinkler of claim 1 , wherein the deflector has a radius of about 0.5-1.1 inches.
13. The pendent fire protection sprinkler of claim 12 , wherein the aligned slots have a radial length of about 0.2-0.6 inches.
14. The pendent fire protection sprinkler of claim 12 , wherein the perpendicular slots have a radial length of about 0.3-0.7 inches.
15. The pendent fire protection sprinkler of claim 12 , wherein the corner slots have a radial length of about 0.4-0.7 inches.
16. The pendent fire protection sprinkler of claim 12 , wherein the first plurality of angled slots have a radial length of about 0.2-0.6 inches.
17. The pendent fire protection sprinkler of claim 12 , wherein the second plurality of angled slots have a radial length of about 0.2-0.4 inches.
18. The pendent fire protection sprinkler of claim 1 , wherein the aligned slots have a radial length of about 25-75% of a radius of the deflector.
19. The pendent fire protection sprinkler of claim 1 , wherein the perpendicular slots have a radial length of about 37-88% of a radius of the deflector.
20. The pendent fire protection sprinkler of claim 1 , wherein the corner slots have a radial length of about 50-88% of a radius of the deflector.
21. The pendent fire protection sprinkler of claim 1 , wherein the first plurality of angled slots have a radial length of about 25-75% of a radius of the deflector.
22. The pendent fire protection sprinkler of claim 1 , wherein the second plurality of angled slots have a radial length of about 25-50% of a radius of the deflector.
23. The pendent fire protection sprinkler of claim 1 , wherein the corner slots form an angle of about 30°-65° with respect to the aligned slots.
24. The pendent fire protection sprinkler of claim 1 , wherein the first plurality of angled slots form an angle of about 15-45° with respect to the aligned slots.
25. The pendent fire protection sprinkler of claim 1 , wherein the second plurality of angled slots form an angle of about 5-35° with respect to the perpendicular slots.
26. The pendent fire protection sprinkler of claim 1 , wherein the nominal K-factor of the sprinkler is 8.0 gpm/psi/ 1/2 .
27. The pendent fire protection sprinkler of claim 1 , wherein the nominal K-factor of the sprinkler is 11.2 gpm/psi 1/2 .
28. The pendent fire protection sprinkler of claim 1 , wherein the nominal K-factor of the sprinkler is 14.0 gpm/psi 1/2 .
29. A pendent fire protection sprinkler, comprising a body including a fluid passage and an output orifice sealed with a seal cap, two arms extending from the body and meeting at a hub, a release mechanism with a thermally-responsive element positioned between the seal cap and the hub, and a deflector positioned on the hub and facing the output orifice, the deflector comprising:
a pair of aligned slots, aligned with a plane of the arms, the aligned slots having a length and a width,
a pair of perpendicular slots, perpendicular to the aligned slots and having a length that is greater than the length of the aligned slots and a width that is less than the width of the aligned slots,
a pair of corner slots, positioned between the aligned slots and the perpendicular slots, and
a first plurality of angled slots, positioned between the aligned slots and the perpendicular slots.
30. The pendent fire protection sprinkler of claim 29 , wherein the corner slots form an angle of about 30°-65° with respect to the aligned slots.
31. The pendent fire protection sprinkler of claim 29 , wherein the first plurality of angled slots form an angle of about 15-45° with respect to the aligned slots.
32. The pendent fire protection sprinkler of claim 29 , further comprising a second plurality of angled slots forming an angle of about 5-35° with respect to the perpendicular slots.