Gas Fire Extinguisher Injection Head With Porous Silencing

Solution Overview

Problem

Conventional gas-type fire extinguisher injection heads generate high noise levels during fire extinguishing operations, posing risks to people in the vicinity and requiring large, costly, and storage-space-consuming designs to reduce noise, and they lack flexibility in adjusting flow rates based on area volume.

Innovation Solution

An injection head with a silencing function featuring a detachable orifice plate and silencing member composed of porous material, allowing for easy storage and quick assembly, and adjustable flow rates through interchangeable orifice plates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional injection heads with orifices are used to release fire-extinguishing gas, then the fire-extinguishing gas can be released to the fire-extinguishing area, but high level noise (over about 120 dB) is generated during emission

Engineering Contradiction:

Improvenoise levelVSAvoidflow rate of fire-extinguishing gas

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The injection head is divided into multiple independent nozzles, each with its own orifice plate and silencing member. This segmentation allows the total flow rate to be maintained while distributing the gas release across multiple smaller openings, reducing noise from each individual nozzle.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Silencing members made of porous materials are installed at the outlet of each nozzle. These porous structures allow the fire-extinguishing gas to pass through while reducing noise generation by dissipating acoustic energy through the porous matrix.

Inventive Principle:

Principle #31Porous materials

2Object-affected harmful factors

If noise reduction measures are implemented in conventional injection heads, then noise levels are reduced, but the device size and complexity increase significantly

Engineering Contradiction:

Improvenoise levelVSAvoidstructure of injection head

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The injection head is divided into multiple independent nozzles, each with its own orifice plate and silencing member. This segmentation allows the total flow rate to be maintained while distributing the gas release across multiple smaller openings, reducing noise from each individual nozzle.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Silencing members made of porous materials are installed at the outlet of each nozzle. These porous structures allow the fire-extinguishing gas to pass through while reducing noise generation by dissipating acoustic energy through the porous matrix.

Inventive Principle:

Principle #31Porous materials

3Adaptability or versatility

If multiple types of orifice plates are stored for different flow rate requirements, then flow rate adjustment is possible, but storage space and costs increase

Engineering Contradiction:

Improveflow rate adjustment capabilityVSAvoidstorage space for orifice plates

Core Design Contradiction:

Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

The orifice plates are designed to be interchangeable and replaceable during installation or maintenance. This dynamic configuration allows the system to adapt to different flow rate requirements by simply swapping plates, eliminating the need to store multiple pre-configured injection head types.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

A single injection head body can accommodate multiple types of orifice plates with different flow characteristics. This universal design allows one injection head unit to serve multiple functions by changing only the orifice plate, reducing storage requirements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The design facilitates easy storage and rapid shipping of injection heads, reduces noise levels, and allows for flexible flow rate adjustments without increasing storage or cost, enhancing safety and efficiency.

Implementation Method 1

a silencing member (4) of block shapes formed on porous material capable of passing a fire extinguishing gas disposed at the outlet side of the orifice plate

Methodology Applied

Scientific EffectPorous material filtration: Porosity

Implementation Method 2

an injection head having a silencing function for gas-type fire extinguisher capable of reducing noise generated at the time of emission of fire-extinguishing gas

Methodology Applied

Scientific EffectAcoustic absorption: Acoustic Absorption

Data Source

PatentUS20260102642A1Injection head having silencing function for gas-type fire extinguisher and method for storing and assembling thereof

Publication Date: 2026.04.16 KOATSU CO LTD

AI summary

By making it to provide an injection head having silencing function for gas-type fire extinguisher and method for storing and assembling thereof capable of eliminating the problems of limitations of place of storage and the cost increase, by making it easy to storage the injection head as stock, the injection head is comprising an injection head main body forming a connecting part for connecting a pipe, an orifice plate forming orifice disposed in the injection head main body for passing the fire extinguishing gas, and a silencing member of block shapes formed on porous material capable of passing the fire extinguishing gas disposed at the outlet side of the orifice plate for releasing the fire extinguishing gas, wherein the orifice plate is disposed detachably in the injection head main body through an opening in the side of a connecting part connected to a piping of the injection head main body.