Glass door
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Solution Overview
Problem
Cooking appliances with transparent oven doors face challenges in maintaining the front or outer surface at an acceptable temperature during cooking operations due to reduced insulation space, which can lead to excessive heating.
Innovation Solution
A cooking appliance design featuring a door with multiple glass panes spaced apart to allow air passage, equipped with a blower and a regulating element to control airflow between the panes, which can be angled to optimize airflow and maintain the outer surface temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the door is designed to be fully or partially transparent, then visual inspection of oven contents is improved, but insulation space is reduced leading to excessive heating of the front surface
Solution Approach 1:
The door is segmented into multiple glass panes (first glass pane, second glass pane, third glass pane) separated by spacers, creating multiple chambers between them. This segmentation allows air to circulate through the chambers, providing cooling to the outer surface of the door while maintaining transparency for visual inspection of the oven contents.
Solution Approach 2:
Air acts as an intermediary cooling medium between the hot oven interior and the external environment. The air circulates through the chambers formed by the spaced glass panes, absorbing heat from the inner glass surfaces and carrying it away, thereby maintaining the outer door surface at an acceptable temperature while preserving transparency.
2Temperature
If multiple glass panes are spaced apart to allow air passage, then cooling of the outer surface is improved, but device complexity increases
Solution Approach 1:
The spacers that define the chambers between glass panes are integrated with the mounting structure for the glass panes. The spacers serve dual functions: maintaining the spacing between panes to enable air circulation for cooling, and providing the mounting means to secure the glass panes to the door frame, thereby reducing overall structural complexity.
Solution Approach 2:
The spacers perform multiple functions simultaneously: they maintain the required spacing between glass panes to allow air flow for thermal management, and they serve as mounting elements to secure the glass panes to the door assembly. This multi-functionality reduces the number of separate components needed, simplifying the overall door structure.
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 effectively regulates airflow to maintain the outer surface temperature of the door at an acceptable level during cooking, providing necessary cooling and enhancing user safety.
Implementation Method 1
a blower configured to move air through the space between the first glass pane and the second glass pane
Implementation Method 2
The space comprises an upper end portion and a lower end portion... a regulating element configured to regulate air passing through the space
Data Source
AI summary
Provided is a cooking appliance that includes an oven cavity, at least one heating element for heating the oven cavity, and a door movable between an open position and a closed position for selectively providing access to the oven cavity. The door includes a first glass pane spaced from a second glass pane to define a space therebetween. The cooking appliance further includes a blower configured to move air through the space between the first glass pane and the second glass pane. The door includes a longitudinal axis that is substantially vertical when the door is in the closed position and the first glass pane and the second glass pane each form an acute angle with the longitudinal axis.