Cooking Appliance Muffle Anti-Explosion Device Using Ignition Source

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Solution Overview

Problem

Cooking appliance muffles face a risk of explosion due to the formation of explosive gas mixtures, necessitating explosion-proof designs that increase manufacturing costs and complexity.

Innovation Solution

A cooking appliance muffle with an anti-explosion device on a cooking chamber wall, featuring an ignition source that maintains a temperature above the ignition temperature of potential explosive gas mixtures, preventing their formation by safely igniting combustible components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the cooking appliance muffle is designed to be explosion-proof without additional devices, then the manufacturing cost and structural complexity are reduced, but the risk of explosion from explosive gas mixtures increases

Engineering Contradiction:

Improveexplosion preventionVSAvoidmuffle structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent converts the harmful explosive gas mixtures into beneficial combustion products by introducing an ignition source that deliberately ignites combustible components. The harmful explosive atmosphere is transformed into a controlled combustion process that prevents explosions while maintaining cooking functionality.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The ignition source acts as an intermediary device between the explosive gas mixture and the cooking chamber environment. It mediates the potential explosion by controlled ignition, converting the uncontrolled explosive hazard into a managed combustion process that protects the muffle structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If an anti-explosion device with ignition source is added to the cooking appliance muffle, then the explosion risk is reduced, but the manufacturing cost increases

Engineering Contradiction:

Improveexplosion preventionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The ignition source is designed as a relatively simple, cost-effective component that can be easily replaced if needed. Rather than using expensive explosion-proof materials or complex safety systems, the patent employs an affordable ignition mechanism that provides adequate explosion prevention for the intended application lifecycle.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the operational parameters by introducing controlled ignition temperatures and timing. By adjusting when and how the ignition source operates, the system achieves explosion prevention through parameter control rather than through expensive structural modifications to the muffle itself.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the ignition source maintains high temperature continuously, then explosive gas mixtures are prevented from forming, but energy consumption increases

Engineering Contradiction:

Improveexplosion preventionVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The ignition source operates periodically rather than continuously, activating only when combustible components are detected or at scheduled intervals. This periodic operation maintains explosion prevention effectiveness while dramatically reducing energy consumption compared to continuous high-temperature maintenance.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system maintains continuous monitoring and readiness for explosion prevention, but the actual ignition action is applied only when needed. This ensures continuous safety protection while avoiding unnecessary energy expenditure during periods when no explosive hazard exists.

Inventive Principle:

Principle #20Continuity of useful action

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 anti-explosion device effectively prevents explosions by maintaining combustible components below a critical threshold, allowing for cost-effective manufacturing and robust operation, particularly during pyrolysis operations.

Implementation Method 1

an anti-explosion device configured such that a formation of an explosive gas mixture is prevented in any operating state of the cooking appliance muffle

Methodology Applied

Scientific EffectIgnition: Combustion

Implementation Method 2

featuring an ignition source that maintains a temperature above the ignition temperature of potential explosive gas mixtures

Methodology Applied

Scientific EffectTemperature maintenance: Heating

Data Source

PatentUS12566001B2Cooking appliance muffle for a cooking appliance, cooking appliance and method for operating a cooking appliance

Publication Date: 2026.03.03 MIELE & CO KG

AI summary

A cooking appliance muffle for a cooking appliance includes: a cooking chamber with a cooking chamber opening tightly closeable by a door of the cooking appliance, at least one cooking chamber wall bounding the cooking chamber. The cooking appliance muffle is explosion-proof. The cooking appliance muffle has, on a side of one of the at least one cooking chamber wall facing the cooking chamber, an anti-explosion device that prevents a formation of an explosive gas mixture in any operating state of the cooking appliance muffle.