Oven Door Flow-Channel Sealing for Vapor Retention and Low Heat Loss
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Solution Overview
Problem
Current cooking appliances suffer from inefficient air flow and vapor extraction due to an undesirable interface between the flow channels on the door side and the appliance side, leading to heat loss and leakage.
Innovation Solution
A flexible seal is placed directly on the device-side wall, forming a flow channel coupling element that adapts to the interface, preventing leakage and optimizing air flow, while a secondary seal further enhances vapor retention by being positioned closer to the cooking chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flow channel interface is formed between door-side and appliance-side flow channels, then air flow and vapor extraction are improved, but leakage and heat loss occur at the interface
Solution Approach 1:
A seal element is introduced as an intermediary component at the interface between the door-side flow channel and the appliance-side flow channel. This seal element prevents leakage and heat loss while maintaining the flow channel connection, thereby resolving the contradiction between improved vapor extraction and reduced heat loss.
Solution Approach 2:
The seal element is designed as a flexible component that can adapt to the interface geometry between the door and appliance housing. This flexibility allows the seal to effectively close the interface opening, preventing harmful leakage and heat loss while maintaining the flow channel functionality.
2Strength
If the outer door pane is exposed to cooking chamber temperature, then structural integrity is maintained, but heat transfer to the outer door pane increases
Solution Approach 1:
A blower device generates a controlled air flow that is directed through the flow channel between the door panes. This air flow acts as a thermal barrier, preventing excessive heat transfer to the outer door pane while maintaining the structural integrity of the door assembly.
Solution Approach 2:
An air flow is introduced as an intermediary thermal barrier between the cooking chamber and the outer door pane. This air flow reduces heat transfer to the outer door pane while allowing the inner door pane to maintain structural integrity through proper thermal design.
3Reliability
If a seal is placed at the flow channel opening, then leakage is reduced, but mechanical stability and seal attachment become challenges
Solution Approach 1:
The seal element is designed to attach directly to the door structure without requiring separate mounting brackets or complex attachment mechanisms. The seal leverages the existing flow channel opening geometry for secure attachment, simplifying the overall structure while maintaining effective sealing.
Solution Approach 2:
The seal element is designed as a flexible component that can conform to the flow channel opening geometry and attach securely to the door structure. This flexibility allows the seal to maintain reliable sealing without requiring complex rigid mounting structures.
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 configuration ensures minimal air infiltration and vapor extraction, reducing the outer door pane temperature without increasing fan speed, allowing for weaker blower usage and improved mechanical stability.
Implementation Method 1
a flexible seal is placed directly on the device-side wall, forming a flow channel coupling element that adapts to the interface
Implementation Method 2
an air flow is generated by means of one or more blowers in the household appliance, which is conveyed as required through the respective intermediate areas of the panes in the door
Data Source
Figure 1~3
AI summary
The invention relates to a door (4) for a domestic appliance (1), having an outer door panel (5) and at least one further panel (6 to 8), the latter being spaced apart from the outer door panel (5), a door-side flow channel (11) therefore being formed between the outer door panel (5) and the further panel (6 to 8), wherein at least one flow-channel opening (12 to 14) is formed at an upper end of the further panel (6 to 8), between the outer door panel (5) and the further panel (6 to 8), and a seal (20) is arranged on the flow-channel opening (12 to 14). The invention also relates to a domestic appliance (1) having a door (4).