Extended coverage, storage, automatic fire protection sprinkler
View Patent ↗A pendent fire protection sprinkler for storage applications, having 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 has aligned slots at about 90° from each other, corner slots located between the aligned slots, and angled slots located between the aligned slots and the corner slots.
1. A pendent fire protection sprinkler, comprising a deflector having:
a first pair of opposed slots,
a second pair of opposed slots at about 90° from the first pair of slots,
a third pair of opposed slots, positioned between both the first and second pairs of opposed slots, and
a plurality of angled slots, positioned between the first and third pairs of opposed slots and the second and third pairs of opposed slots, wherein a centerline of each angled slot extends outwardly in a direction toward a centerline of an adjacent one of the third pair of opposed slots that extends outwardly.
2. The pendent fire protection sprinkler of claim 1 , wherein the sprinkler achieves a water discharge density of 0.6 gpm/ft 2 density over an area of 2000 ft 2 .
3. The pendent fire protection sprinkler of claim 1 , wherein the deflector comprises a planar, circular disk.
4. The pendent fire protection sprinkler of claim 1 ,
wherein the deflector has a radius of about 1.6-2.1 inches.
5. The pendent fire protection sprinkler of claim 4 , wherein the first and second pairs of opposed slots have a radial length of about 0.4-0.5 inches.
6. The pendent fire protection sprinkler of claim 4 , wherein the third pair of opposed slots have a radial length of about 0.5-0.7 inches.
7. The pendent fire protection sprinkler of claim 4 , wherein the angled slots have a radial length of about 0.15-0.20 inches.
8. The pendent fire protection sprinkler of claim 1 , wherein the first and second pairs of slots have a radial length of about 20-30% of a radius of the deflector.
9. The pendent fire protection sprinkler of claim 1 , wherein the angled slots have a radial length of about 7-12% of a radius of the deflector.
10. The pendent fire protection sprinkler of claim 1 , wherein a center line of the angled slots form an angle of about 20-50° with respect to a radial line extending from a center of the deflector through inner ends of the angled slots.
11. The pendent fire protection sprinkler of claim 1 , wherein the inner ends of the angled slots are positioned about 15-30° from the nearest slot of the first and second pairs of slots.
12. The pendent fire protection sprinkler of claim 1 , wherein the third pair of opposed slots form an angle of about 40-50° with the first and second pairs of slots.
13. The pendent fire protection sprinkler of claim 1 , wherein the third pair of opposed slots have a radial length of about 28-38% of a radius of the deflector.
14. The pendent fire protection sprinkler of claim 1 , wherein the nominal K-factor of the sprinkler is 25.2.
15. A pendent fire protection sprinkler for storage applications, 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 plurality of aligned slots at about 90° from each other;
a plurality of corner slots located between the aligned slots; and
a plurality of angled slots located between the aligned slots and the corner slots, wherein a centerline of each angled slot extends outwardly in a direction toward a centerline extending outwardly from an adjacent corner slot.
16. The pendent fire protection sprinkler of claim 15 , wherein the aligned slots are parallel to or perpendicular to a plane of the arms.
17. The pendent fire protection sprinkler of claim 15 , wherein the sprinkler achieves a water discharge density of 0.6 gpm/ft 2 density over an area of 2000 ft 2 .
18. The pendent fire protection sprinkler of claim 15 , wherein the deflector comprises a planar, circular disk.
19. The pendent fire protection sprinkler of claim 15 ,
wherein the deflector has a radius of about 1.6-2.1 inches.
20. The pendent fire protection sprinkler of claim 19 , wherein the first and second pairs of opposed slots have a radial length of about 0.4-0.5 inches.
21. The pendent fire protection sprinkler of claim 19 , wherein the corner slots have a radial length of about 0.5-0.7 inches.
22. The pendent fire protection sprinkler of claim 19 , wherein the angled slots have a radial length of about 0.15-0.20 inches.
23. The pendent fire protection sprinkler of claim 15 , wherein the aligned slots have a radial length of about 20-30% of a radius of the deflector.
24. The pendent fire protection sprinkler of claim 15 wherein the angled slots have a radial length of about 7-12% of a radius of the deflector.
25. The pendent fire protection sprinkler of claim 15 , wherein a center line of the angled slots form an angle of about 20-50° with respect to a radial line extending from a center of the deflector through inner ends of the angled slots.
26. The pendent fire protection sprinkler of claim 15 , wherein the inner ends of the angled slots are positioned about 15-30° from the nearest slot of the first and second pairs of slots.
27. The pendent fire protection sprinkler of claim 15 , wherein the corner slots form an angle of about 40-50° with the aligned slots.
28. The pendent fire protection sprinkler of claim 15 , wherein the corner slots have a radial length of about 28-38% of a radius of the deflector.
29. The pendent fire protection sprinkler of claim 15 , wherein the nominal K-factor of the sprinkler is 25.2.