Oven Door Heat-Conducting Plate for Front Pane Cooling
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Solution Overview
Problem
Existing oven doors with heat-conducting plates fail to effectively manage heat build-up and air flow, leading to high contact temperatures on the front pane, especially in the upper area, which can cause discomfort and inefficiency in self-cleaning ovens.
Innovation Solution
An oven door design featuring a heat-conducting plate with a guide element that deflects upward air flows, maintaining a defined distance from the front pane and incorporating a metallic material for efficient heat reflection, along with a ventilated air duct for enhanced cooling, and a conductive element that extends over a significant portion of the plate for improved air flow management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat-conducting plate is placed close to the front pane, then heat reflection and cooling efficiency improve, but the risk of heat build-up and high contact temperatures increases
Solution Approach 1:
The gap between the heat-conducting plate and front pane is segmented into different zones: a first gap region at the upper end and a second gap region at the lower end. This segmentation allows different air flow patterns in different regions, enabling effective cooling while preventing heat build-up.
Solution Approach 2:
Air flow is utilized to cool the front pane and remove heat. The design creates convection currents through the segmented gap, with air entering at the upper end, flowing down along the heat-conducting plate, and exiting at the lower end, effectively carrying heat away from the front pane.
2Productivity
If the distance between the front pane and heat-conducting plate is small, then cooling efficiency improves, but air flow management and heat distribution become more difficult
Solution Approach 1:
The gap distance is not uniform but varies locally: a smaller first gap distance at the upper end section and a larger second gap distance at the lower end section. This local variation optimizes air flow characteristics and heat distribution in different regions without requiring complex active control systems.
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 reduces the surface temperature of the front pane by deflecting hot air flows and creating a secondary air flow, resulting in lower contact temperatures and efficient cooling, while also allowing for cost-effective manufacturing and reduced heat build-up.
Implementation Method 1
the heat-conducting plate has a guide element which deflects a vertically upward air flow in the direction of the pane on the cooking chamber side
Implementation Method 2
the heat-conducting plate is designed in such a way that it reflects heat radiation arriving from the direction of the pane on the cooking chamber side
Implementation Method 3
a heat-conducting plate made of heat-conducting material is located a short distance in front of the front pane
Data Source
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AI summary
The door has front- and cooking chamber-sided plates (2, 6) made of glass material and defining an intermediate space (7) in which a heat-conductive plate (10) is provided at a distance (A) from the front-sided plate. The heat-conductive plate has a conductive element (12) formed at its upper end section and deflecting vertically upwardly directed air flow (V) towards the cooking chamber-sided plate. The conductive element is formed by deformation of the heat-conductive plate that is made of aluminum or stainless steel and formed as a part of a cover plate (34).