Oven Door Cooling Guide Using Venturi Flow to Reduce Glass Layers
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Solution Overview
Problem
Conventional ovens face challenges with door cooling efficiency due to the use of multiple sheets of glass, which increase weight, complicate cleaning, and limit the venturi effect, while high-temperature water vapor discharge during door opening poses a user safety concern.
Innovation Solution
The oven design incorporates a cooling guide that maximizes the venturi effect by narrowing the air flow path and minimizes the number of glass sheets, with a sensor-activated air guide that redirects high-temperature vapor downwards when the door is open, and a control unit that adjusts the cooling fan speed to enhance air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple sheets of glass are used to form the door, then the door can withstand high-temperature heat, but the overall weight of the oven increases and cleaning becomes inconvenient
Solution Approach 1:
The patent extracts the intermediate glass layer from the door structure, transitioning from a three-layer glass configuration to a two-layer structure. This removal of the intermediate layer directly reduces door weight while maintaining the essential heat resistance function through the remaining inner and outer glass layers.
Solution Approach 2:
The patent changes the structural parameters of the door by reducing the number of glass sheets from three to two. This parameter change optimizes the weight-heat resistance trade-off, achieving sufficient thermal protection with reduced material mass.
2Temperature
If multiple sheets of glass are used to form the door, then the door can withstand high-temperature heat, but the cleaning process becomes inconvenient
Solution Approach 1:
By removing the intermediate glass layer, the patent simplifies the door structure to two layers, making the cleaning process more accessible and convenient while preserving the necessary heat resistance through the inner and outer glass layers.
Solution Approach 2:
The patent optimizes the segmentation of glass layers by selecting a two-layer configuration instead of three, creating an optimal balance between thermal protection and cleaning accessibility.
3Speed
If a cooling guide narrows the width of the cooling flow path to generate venturi effect, then air flow speed increases, but it may disturb the flow of air passing through the door flow paths
Solution Approach 1:
The cooling guide is positioned to apply the venturi effect locally at the cooling flow path without interfering with the door flow paths. This localized narrowing increases air flow speed where needed while maintaining stable air flow through the door structure.
Solution Approach 2:
The patent resolves the conflict by spatially separating the cooling flow path from the door flow paths, allowing the cooling guide to narrow the cooling path in one dimension without disturbing the air flow stability in adjacent dimensions.
4Productivity
If the cooling fan speed is increased to enhance air flow, then door cooling efficiency improves, but energy consumption increases
Solution Approach 1:
The patent optimizes the cooling fan operating parameters to achieve maximum cooling efficiency at moderate speed levels. By adjusting fan speed parameters and coordinating with the cooling guide geometry, the system achieves effective door cooling without excessive energy consumption.
Solution Approach 2:
The control unit monitors door temperature and adjusts cooling fan speed accordingly, creating a feedback control system that maintains optimal cooling efficiency while minimizing energy consumption by operating the fan at the lowest necessary speed.
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 cools the oven door, reduces weight and cleaning complexity, and safely diffuses high-temperature vapor downwards, improving user safety and efficiency.
Implementation Method 1
A cooling guide is installed at an ejection hole of air ejected by the cooling fan and narrows the width of the flow path so as to generate the venturi effect
Implementation Method 2
The door cooling unit inhales (draws in) external air using a cooling fan, ejects the inhaled air to the outside, and generates a flow of air inside the door
Data Source
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AI summary
An oven (1) that effectively cools a door (30) by adjusting a position of a cooling guide (80) includes a casing (10) having at least one air intake hole and at least one ejection hole (57); a cooking chamber (20) which has an opening and is placed inside the casing (10); a door (30) that is rotatably coupled to one portion of the casing (10) so as to open/close the opening; a cooling fan (50) that discharges air introduced into the air intake hole to the ejection hole (57) placed at a front portion of the casing (10); and an air guide (95) that is installed adjacent to the ejection hole (57) so as to change a direction of air driven by the cooling fan (50). The cooling guide (80) is installed not to disturb the flow of air that passes through the door (30) so that the door using minimum sheets of glass (31, 32, 33) can be provided.