Multi-deck baking oven with insulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional multi-deck baking ovens require thick insulation to prevent heat transfer between chambers, leading to poor ergonomics, health and safety concerns, and contamination hazards due to brittle compressed insulation materials that can act as heat sources and allow insulation to enter the chambers over time.
Innovation Solution
A hollow partition with thin-walled members and air-filled voids, connected by reinforcing rib members with gas communication slots, functions as a heat exchange buffer to rapidly equilibrate temperatures between chambers, minimizing heat flow and using a bake computer for temperature regulation, and includes baffle members to restrict air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If thick insulation material is used between baking chambers, then heat transfer between chambers is reduced, but the oven height increases making top and bottom chambers difficult to reach
Solution Approach 1:
The patent changes the thermal properties of the partition by using hollow metallic structures filled with air or inert gas instead of conventional solid insulation materials. This parameter change allows achieving equivalent thermal insulation performance with significantly reduced thickness, thereby maintaining ergonomic access to all chambers while preventing heat transfer.
Solution Approach 2:
The partition employs a composite structure combining metallic walls with air or inert gas filling. This composite approach leverages the reflective properties of metal surfaces and the low thermal conductivity of gases to achieve superior insulation performance in a compact form factor.
2Ease of operation
If highly compressed insulating material is used to reduce thickness, then the number of accessible chambers increases, but the material becomes brittle and can act as a heat source
Solution Approach 1:
The patent uses thin-walled metallic structures that are replaceable and durable rather than relying on long-lasting compressed insulation materials that degrade over time. The metallic partitions maintain their structural and thermal properties throughout the oven's operational life without becoming brittle or accumulating heat.
Solution Approach 2:
The invention changes from using organic/compressed insulation materials to metallic structures with air or inert gas filling. This parameter change eliminates the brittleness and heat accumulation problems associated with compressed materials while maintaining thin profile and reliable thermal performance.
3Loss of energy
If conventional insulation material is used, then thermal isolation is achieved, but insulation material can enter baking chambers causing contamination
Solution Approach 1:
The patent uses continuous thin-walled metallic partitions that form seamless barriers between chambers. These thin film-like metallic structures provide effective thermal isolation while being non-porous and impermeable, preventing any material from entering the baking chambers and eliminating contamination risks.
Solution Approach 2:
The metallic partition with air or inert gas filling creates a sealed composite structure that maintains thermal isolation without the fibrous or particulate materials found in conventional insulation. This composite design inherently prevents contamination while achieving the required thermal performance.
4Use of energy by moving object
If heating elements are located under the oven floor forming false floor, then heating efficiency is improved, but greater insulation thickness is required
Solution Approach 1:
The patent changes the thermal properties and structure of the partition to withstand and efficiently manage the heat from underfloor heating elements. The hollow metallic structure with air or inert gas filling provides high thermal resistance in a thin profile, allowing the false floor design to maintain heating efficiency without requiring excessive insulation thickness.
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 solution efficiently regulates heat balance between chambers, maintaining consistent bake quality, reducing the need for bulky insulation, improving ergonomics, and preventing contamination, while allowing easier access and maintenance.
Implementation Method 1
inserting insulation (e.g. rockwool) between the baking chamber's floor and roof. This avoids unwanted heat from one baking chamber, travelling through to the walls which separate the adjacent baking chambers.
Implementation Method 2
The hollow portion may be characterised by the absence of insulation or solid material. The internal void is preferably filled only with air or heated gases.
Data Source
Figure 1
Figure 2~2(a)
AI summary
A multi-deck baking oven including a housing and at least two baking chambers (20) located within the housing, adjacent baking chambers being separated by an insulating layer (15), at least one of the insulating layers (15) including a hollow partition, wherein each insulating layer dampens the rate of heat flow between the adjacent baking chambers.