Ceramic-Lined Fireplace With Intermediate Heat Exchange
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Solution Overview
Problem
Current fireplaces using natural or technical silicate materials for combustion spaces face limitations due to low resistance to temperature fluctuations, chemical resistance, and porosity, which affect mechanical and chemical resistance, especially when exposed to corrosive gases.
Innovation Solution
A single-chamber fireplace design featuring a combustion space lined with ceramic or glass-ceramic materials, with a wall element positioned at a distance to create an intermediate space for heat transmission, allowing controlled heat input and featuring a heat exchanger and an easy-to-clean surface, optionally with IR radiation absorption or insulation, to enhance efficiency and optical viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If natural or technical silicate materials are used for combustion-space lining, then cost is reduced, but resistance to temperature fluctuations and chemical resistance deteriorate
Solution Approach 1:
The patent uses glass-ceramic material as a combustion-space lining that combines the advantages of both natural silicates (cost-effectiveness) and technical silicates (thermal stability and chemical resistance). The glass-ceramic composite structure provides low thermal expansion coefficient, high porosity resistance, and good chemical resistance while maintaining affordability.
2Reliability
If ceramic or glass-ceramic materials are used for combustion-space lining, then resistance to temperature fluctuations and chemical resistance improve, but weight increases
Solution Approach 1:
The patent utilizes the porous structure of glass-ceramic materials to reduce density and weight while maintaining high resistance to temperature fluctuations and chemical corrosion. The porosity provides thermal insulation and reduces material density without compromising the structural integrity or resistance properties.
3Device complexity
If wall element is positioned close to combustion-space lining, then structural simplicity is maintained, but heat transmission efficiency deteriorates
Solution Approach 1:
The patent introduces an intermediate space between the combustion-space lining and the wall element to facilitate heat transmission. This intermediate space acts as a mediator that allows controlled heat flow from the combustion space to the wall element, improving heat transmission efficiency while maintaining structural simplicity through a straightforward spatial arrangement.
4Strength
If combustion-space lining is made of opaque materials, then mechanical strength is improved, but optical viewing capability deteriorates
Solution Approach 1:
The patent applies local quality by making the combustion-space lining partially transparent in specific regions (such as the front viewing area) while maintaining opaque material properties in other areas for structural strength. This allows optical viewing capability in designated areas while preserving mechanical strength overall through selective transparency application.
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
This design improves heat efficiency, mechanical and chemical resistance, and optical viewing by decoupling heat energy from the combustion space, allowing for controlled heat input and additional convective heating, while maintaining high cleanliness and reduced weight through the use of high-temperature-resistant ceramics or glass ceramics.
Implementation Method 1
decoupling heat energy from the combustion space via the ceramics or glass ceramics and introducing it into the intermediate space
Implementation Method 2
heat transmission by decoupling heat energy from the combustion space via the ceramics or glass ceramics
Implementation Method 3
additional convective heating
Implementation Method 4
heat exchanger disposed in the intermediate space
Implementation Method 5
combustion space that is delimited by a combustion-space lining
Data Source
AI summary
A fireplace is provided that includes a combustion space delimited by a combustion-space lining and accessible through a door or flap. The combustion-space lining is at least partially composed of a ceramic or glass-ceramic material. The fireplace also includes a wall element disposed on a side of the combustion-space lining that faces away from the combustion space so that an intermediate space is formed between the side and the wall element. A heat exchanger or insulating material ca n be positioned in the intermediate space.