Fire protection floor nozzle, systems, and methods for floor nozzle spray systems

A grate nozzle assembly for a floor fire suppressant system, the grate nozzle assembly comprising:

• a nozzle assembly having:
• a body having a mounting portion configured to couple to a fire suppressant solution supply pipe and a body flange portion axially spaced from the mounting portion with an internal transverse passage extending therebetween along a central nozzle axis, the transverse passage defining an inlet opening and an outlet opening with the body flange portion extending around the outlet opening, the body flange portion including an upper support surface;
• and
• a deflector supported on the upper support surface of the body flange portion, the deflector having a deflector flange including an upper surface disposed normal to the central nozzle axis, a lower surface angled with respect to the upper surface and an outer perimeter between the upper surface and the lower surface circumscribing the nozzle axis to define a linear frustoconical portion of the deflector that extends radially inward at a radial length from the outer perimeter, the deflector flange including a plurality of projecting members each having a radial inner portion and a radial outer portion, the plurality of projecting members extending from the lower surface of the deflector flange in supporting contact with the support surface of the body flange portion, the support surface of the body flange portion being angled with respect to the upper surface of the deflector flange, the plurality of projecting members being circumferentially spaced around the outlet opening to form a plurality of passageways therebetween each having a converging inlet portion and a diverging outlet portion, the outlet opening and passageways through which fire suppressant solution flows and exits as a fire suppressant foam to form a generally lateral radial pattern for delivering the fire suppressant foam to a protected area, wherein the radial outer portion of each of the projecting members having a first curved edge, a second curved edge, and a third curved edge between the first and second curved edge having a different curvature than the first curved edge and the second curved edge, the first and second curved edges having a same curvature;
• and
• a mounting assembly for mounting the nozzle assembly, the mounting assembly including a recessed cavity for receiving and supporting the nozzle assembly.

A method of delivering a fluorine-free fire suppressant foam to a protected area having a floor area with a crowned peak, the method comprising:

• positioning a floor nozzle having:
• a body having a mounting portion configured to couple to a fire suppressant solution supply pipe and a body flange portion axially spaced from the mounting portion with an internal transverse passage extending therebetween along a central nozzle axis, the transverse passage defining an inlet opening and an outlet opening with the body flange portion extending around the outlet opening, the body flange portion including an upper support surface;
• and
• a deflector supported on the upper support surface of the body flange portion, the deflector having a deflector flange including an upper surface disposed normal to the central nozzle axis, a lower surface angled with respect to the upper surface and an outer perimeter between the upper surface and the lower surface circumscribing the nozzle axis to define a linear frustoconical portion of the deflector that extends radially inward at a radial length from the outer perimeter, the deflector flange including a plurality of projecting members each having a radial inner portion and a radial outer portion, the plurality of projecting members extending from the lower surface of the deflector flange in supporting contact with the support surface of the body flange portion, the support surface of the body flange portion being angled with respect to the upper surface of the deflector flange, the plurality of projecting members being circumferentially spaced around the outlet opening to form a plurality of passageways therebetween each having a converging inlet portion and a diverging outlet portion, the outlet opening and passageways through which a fluorine-free fire suppressant solution flows and exits as a fluorine-free fire suppressant foam to form a generally lateral radial pattern for delivering the fluorine-free fire suppressant foam to the protected area, wherein the radial outer portion of each of the projecting members having a first curved edge, a second curved edge, and a third curved edge between the first and second curved edge having a different curvature than the first curved edge and the second curved edge, the first and second curved edges having a same curvature;
• and
• flowing the fluorine-free fire suppressant solution through the floor nozzle for generating and distributing the fluorine-free fire suppressant foam over an inclined surface of the floor area sloping upward from the floor nozzle for a distance of 25 ft. and to totally cover the floor area of the protected area.