Granted Patent B2

US 12,357,854 · App. 16/973,225 · Granted Jul 15, 2025

Inventor: Thomas Carl Kjellman (Uxbridge, MA)

Assignee: Kidde-Fenwal, LLC

A62C2/08A62C3/006

Abstract

Claims (20)

1. A fire suppression and isolation system, comprising:

a hood;

a workstation including a back wall, the workstation including a heat generating appliance, the heat generating appliance disposed underneath the hood and in front of the back wall so as to be partially enclosed by the hood and the back wall, a hazard volume being located between the work station and the hood, a non-hazard volume being outside of the hood and workstation, the heat generating appliance being one of a cooktop, a broiler, a grill, a deep fat fryer, and a weld station

an ejection nozzle disposed on a distal end of the hood and positioned between the non-hazard volume and the hazard volume;

a dispersion nozzle spaced apart from the ejection nozzle and disposed within the hazard volume; and

a valve assembly arranged to control a release of a suppression medium from a container to the ejection nozzle and the dispersion nozzle, responsive to a thermal event, such that the suppression medium ejected from the ejection nozzle defines a fluid barrier that is disposed between the non-hazard volume and the hazard volume;

a fluid return having a return inlet that is spaced apart from and is axially aligned with the ejection nozzle, the return inlet fluidly coupled to a passageway that extends along the back wall and is fluidly coupled to the ejection nozzle so as to recycle so as to recycle the suppression medium; and

wherein the ejection nozzle is arranged to eject the suppression medium at a first flow rate; and

the dispersion nozzle is arranged to disperse the suppression medium at a second flow rate that is less than the first flow rate.

2. The fire suppression and isolation system of claim 1 , wherein the suppression medium is at least one of water, air, an inert gas, and a clean agent.

3. The fire suppression and isolation system of claim 1 , wherein the dispersion nozzle is arranged to disperse the suppression medium within the hazard volume.

4. The fire suppression and isolation system of claim 1 , wherein the ejection nozzle is at least partially disposed on the workstation.

5. The fire suppression and isolation system of claim 1 , further comprising a deflector that is spaced apart from and is proximately aligned with the ejection nozzle, the deflector being arranged to deflect at least a portion of the fluid barrier towards the hazard volume.

6. The fire suppression and isolation system of claim 1 , wherein the ejection nozzle is at least partially disposed in a hood.

7. The fire suppression and isolation system of claim 1 , wherein the fluid return is at least partially defined by the workstation.

8. The fire suppression and isolation system of claim 1 , wherein the ejection nozzle is arranged to eject the suppression medium towards at least one of an edge of the workstation and a front edge of the hood.

9. The fire suppression and isolation system of claim 1 , wherein the fluid barrier is formed as a curtain of laminar flow of the suppression medium.

10. The fire suppression and isolation system of claim 1 , wherein the dispersion nozzle is arranged to disperse the suppression medium towards the workstation.

11. The fire suppression and isolation system of claim 10 , wherein the fluid barrier is arranged to inhibit the suppression medium from flowing into the non-hazard volume.

12. The fire suppression and isolation system of claim 1 , wherein the fluid return is arranged to receive at least a portion of the suppression medium ejected from the ejection nozzle.

Assignments (6)

Continuity (2)

References Cited (43)