Fire protection device and method for fire protection of an industrial oil cooker

Patent metadata

Field	Value
Publication number	US-9782612-B2
Application number	US-201514687780-A
Country	US
Kind code	B2
Filing date	Apr 15, 2015
Priority date	Mar 15, 2013
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

Fire protection mist nozzles for industrial oil cookers, oil cookers with fire protection systems, and method of oil cooker fire protection are provided. The mist nozzles operate at pressures between 170 and 250 psi, and provide a unique distribution pattern that allows for variable installations for protection in certain operative environments including oil cookers with various hood configurations. The fire protection nozzles includes a base defining an inlet and an outlet along an axis. The base includes an orifice having an inlet diameter and an outlet diameter. The outlet diameter is preferably greater than the inlet diameter; and the orifice defines a K-factor of less than 1.0 gpm/psi½. The nozzle includes a diffuser aligned with the orifice. The diffuser has a preferably substantially domed portion with a maximum diameter that is less than the summation of the inlet diameter and the outlet diameter of the orifice.

First claim

What is claimed is:

1. A fire protection nozzle comprising:
a base defining an inlet and an outlet along an axis, the base having an orifice, the orifice having an inlet diameter and an outlet diameter, the outlet diameter being greater than the inlet diameter, the orifice defining a K-factor of less than 1.0 gpm/psi½; and
a diffuser having a partially spherical domed portion, the diffuser being aligned with the orifice, the domed portion having a maximum diameter being less than a summation of the inlet diameter and the outlet diameter of the orifice.

2. The nozzle of claim 1 , wherein the orifice is defined by an orifice member having a surface substantially perpendicular to the axis and exposed to the inlet, the surface defining a first area, the inlet diameter defining a second area, the first area being greater than the second area, the orifice having at least a tapering wall between the inlet diameter and the outlet diameter, the tapering wall tapers away from and along the axis.

3. The nozzle of claim 2 , wherein a ratio of the first area to the second area being approximately 5:1.

4. The nozzle of claim 2 , wherein the inlet diameter and the outlet diameter are spaced along the axis to define a length of the orifice member, the first area defining a diameter of the orifice member that is greater than the length of the orifice member.

5. The nozzle of claim 4 , the ratio of the diameter of the orifice member to the length of the orifice member being approximately 5:1.

6. The nozzle of claim 2 , wherein the surface substantially perpendicular to the axis and exposed to the inlet defines a first surface, the orifice member including:
a second surface that surrounds, extends along and is substantially parallel to the axis, the second surface adjacent the first surface to define a first sharp edge;
a third surface that surrounds, extends along and tapers away from and along the axis, the third surface adjacent the second surface to define a second sharp edge; and
a fourth surface substantially perpendicular to the axis and exposed to the outlet, the fourth surface adjacent the third surface to define a third sharp edge.

7. The nozzle of claim 6 , wherein the first and second surfaces defining the first sharp edge are disposed at approximately 90 degrees relative to each other; the second and third surfaces defining the second sharp edge are disposed at approximately 150 degrees relative to each other; and the third and fourth surfaces defining the third sharp edge are disposed at approximately 120 degrees relative to each other.

8. The nozzle of claim 1 , wherein the orifice has a cylindrical wall adjacent a frusto-conical wall to define the orifice.

9. The nozzle of claim 8 , wherein the cylindrical wall terminates at an inlet surface of the orifice to define an inlet edge, the inlet edge being approximately 90 degrees between the inlet surface and the cylindrical wall; the cylindrical wall and the adjacent frusto-conical wall meeting at a transition edge within the orifice, the transition edge being approximately 150 degrees between the cylindrical wall and the frusto-conical wall; the cylindrical wall and the frusto-conical wall define a length of the orifice along the axis, the cylindrical wall defining an orifice diameter; and the frusto-conical surface defining a cone angle of approximately 60 degrees.

10. The nozzle of claim 1 , the inlet diameter being approximately 0.10 inches; the outlet diameter being approximately 0.25 inches; and the maximum diameter of the substantially domed portion being approximately 0.30 inches.

11. The nozzle of claim 1 , wherein the domed portion of the diffuser is one of hemispherical and spherical.

12. The nozzle of claim 11 , wherein the domed portion is hemispherical and coaxially with and downstream of the orifice, the diffuser including:
a base surface substantially perpendicular to the axis, the base surface adjacent a perimeter of the hemispherical surface to define a diffuser sharp edge; and
a support surface extending from the base surface along the axis.

13. A fire protection nozzle comprising:
a base defining an inlet and an outlet along an axis, the base having an orifice member, the orifice member having an inlet diameter and an outlet diameter, the orifice member defines an orifice along the axis, the orifice member having a first surface substantially perpendicular to the axis and exposed to the inlet, a second surface that surrounds, extends along and is substantially parallel to the axis, the second surface adjacent the first surface to define a first sharp edge, a third surface that surrounds, extends along and tapers away from and along the axis, the third surface adjacent the second surface to define a second sharp edge, and a fourth surface substantially perpendicular to the axis and exposed to the outlet, the fourth surface adjacent the third surface to define a third sharp edge; the outlet diameter being greater than the inlet diameter, the orifice defining a K-factor of less than 1.0 gpm/psi½;
a diffuser having a partially spherical domed portion, the diffuser being aligned with the orifice, the partially spherical domed portion having a maximum diameter being less than the summation of the inlet diameter and the outlet diameter of the orifice.

14. A fire protection nozzle comprising
a base defining an inlet and an outlet along an axis;
a member disposed between the inlet and outlet that defines an orifice along the axis, the member having a first surface substantially perpendicular to the axis and exposed to the inlet, a second surface that surrounds, extends along and is substantially parallel to the axis, the second surface adjacent the first surface to define a first sharp edge, a third surface that surrounds, extends along and tapers away from and along the axis, the third surface adjacent the second surface to define a second sharp edge, and a fourth surface substantially perpendicular to the axis and exposed to the outlet, the fourth surface adjacent the third surface to define a third sharp edge;
a diffuser having a hemispherical surface coaxially with and downstream of the orifice, a base surface substantially perpendicular to the axis, the base surface adjacent a perimeter of the hemispherical surface to define a fourth sharp edge, and a support surface extending from the base surface along the axis; and
a pair of arms that extends from the base and is fixed to the support surface of the diffuser.

15. An industrial oil cooker, the cooker comprising:
a pan of oil to define an oil surface;
a hood disposed over the oil, the hood including an angled hood surface disposed at a fixed height over the oil surface and disposed at an angle relative to a lateral plane parallel to the oil surface so as to define a hood angle; and
at least one fire protection nozzle having an orifice to define a nozzle axis, the nozzle being mounted through the angled hood surface such that the nozzle axis is perpendicular to the angled hood surface.

16. The oil cooker of claim 15 , wherein the hood angle being greater than zero and a maximum of fifteen degrees.

17. The oil cooker of claim 15 , wherein the at least one fire protection nozzle includes two fire protection nozzles, the angled hood surface having a first portion and a second portion, one nozzle being disposed on the first portion, the other nozzle being disposed on the second portion.

18. The oil cooker of claim 15 , wherein the oil pan defines a lateral width and a lateral length, the at least one nozzle including a plurality of nozzles space

Assignees

• Tyco Fire Products Lp

Inventors

• Magnone Zachary L
• Almeida Jose L
• Bowder Jr Thomas W
• Goyette Chad A

Classifications

• A47J37/1276

  Constructional details (A47J37/1247 and A47J37/1261 take precedence) · CPC title

• A62C31/02

  Nozzles specially adapted for fire-extinguishing · CPC title

• A62C3/006 Primary

  for kitchens or stoves · CPC title

• A47J37/1271

  Accessories · CPC title

• A62C99/0072

  using sprayed or atomised water · CPC title