# US 11,998,782 B2 · Fire detection and suppression

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- Number: US 11,998,782 B2
- Document ID: US11998782B2
- Status: Granted
- Kind: B2
- Application number: 16/575,634
- Filed: 2019-09-19
- Published: 2021-03-25
- Granted: 2024-06-04
- Earliest claimed: 2019-09-19
- Assignees: Kidde Technologies, Inc.
- Applicants: Kidde Technologies, Inc.
- Inventors: Aaron Stanley Rogers
- Web page: https://patentgrep.com/patent/US11998782B2

## CPC

- A62C 37/44: only the sensor being in the danger zone
- A62C 3/08: in aircraft {(A62C3/0207 takes precedence)}
- A62C 3/16: in electrical installations, e.g. cableways
- G01N 21/7703: {using reagent-clad optical fibres or optical waveguides (using measurement of total internal reflection or attenuated total reflection G01N21/552; optical fibres or waveguides per se G02B)}
- A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10)
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

Systems and methods for a fire suppression system are provided. Aspects include receiving, from a sensor, environmental data associated with a location, determining a presence of a fire and a fire type based at least in part on the environmental data associated with the location, operating a fire suppression system in a plurality of modes based on the presence of the fire and the fire type, wherein the plurality of modes comprise a normal fire operation mode and a hazardous fire operation mode.

## Claims

### Claim 1

A method for operating a fire suppression system, the method comprising:
receiving, from a sensor, environmental data associated with a location;
determining a presence of a fire;
determining whether the fire is a lithium ion battery fire or is not a lithium ion battery fire, based at least in part on a gas emission signature in the location, wherein determining whether the fire is a lithium ion battery fire or is not a lithium ion battery fire includes:
analyzing the gas emission signature to determine a presence of lithium ion fire gas emissions; and
based on determining the presence of the lithium ion fire gas emissions,
operating a fire suppression system in:
a first fire operation mode used when the lithium ion fire gas emissions are not present; or
operating the fire suppression system in a lithium ion battery fire operation mode when the lithium ion fire gas emissions are present.

### Claim 2 (depends on 1)

The method of claim 1, wherein the fire suppression system comprises a first fire extinguisher, a second fire extinguisher, a dryer/meter unit, a nozzle, a bypass valve, and a duct system;
wherein the duct system comprises:
a first line connecting the first fire extinguisher to the nozzle;
a second line connecting the second fire extinguisher to the nozzle, wherein the dryer/meter unit is interposed between the second fire extinguisher and the nozzle in the second line;
a third line connecting the second fire extinguisher to the nozzle, wherein the bypass valve is interposed between the second fire extinguisher and the nozzle in the third line;
wherein the fire suppression system is configured to discharge a fire suppression agent into the location through the nozzle; and
wherein the fire suppression agent is stored in the first fire extinguisher and the second fire extinguisher.

### Claim 3 (depends on 2)

The method of claim 2, wherein operating the fire suppression system in the lithium ion battery fire operation mode comprises:
discharging the fire suppression agent from the first fire extinguisher through the first line and nozzle;
engaging the bypass valve to discharge the fire suppression agent from the second fire extinguisher through the third line and nozzle.

### Claim 4 (depends on 2)

The method of claim 2, wherein operating the fire suppression system in the first fire operation mode comprises:
discharging the fire suppression agent from the first fire extinguisher through the first line and nozzle;
discharging the fire suppression agent from the second fire extinguisher through the second line and nozzle; and
operating the dryer/meter unit to regulate a flow of the fire suppression agent through the second line.

### Claim 5 (depends on 1)

The method of claim 1, wherein the environmental data associated with the fire comprises an infrared thermal energy signature.

### Claim 6 (depends on 5)

The method of claim 5, wherein the algorithm comprises one or more of direct gas absorption, Raman Scattering, Fluorescence, and Surface Plasmon resonance.

### Claim 7 (depends on 1)

The method of claim 1, wherein the sensor comprises an fiber optic detection sensor.

### Claim 8 (depends on 1)

The method of claim 1, further comprising generating an alert.

### Claim 9 (depends on 1)

The method of claim 1, wherein the location comprises an aircraft compartment.