Oven Door Structure With Middle Plate for Heat-Blocking Cooling
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Solution Overview
Problem
Cooking apparatuses face challenges in preventing heat transfer from the cooking cavity to the outside door or handle, and in effectively cooling the inside of the door using air flow, while also allowing users to view the cooking cavity and blocking foreign substances from entering.
Innovation Solution
The cooking apparatus incorporates a middle plate between the front plate and door frame to block heat transfer, with a flow path that directs air from the rear space through the door, including a choke cover to prevent foreign substances and a transparent front plate for user visibility, and a bracket to guide air flow between the front and middle plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a door is provided with a transparent front plate for user visibility, then user visibility into the cooking cavity is improved, but heat transfer from the cooking cavity to the door increases
Solution Approach 1:
A middle plate is introduced as an intermediary component between the transparent front plate and the door frame. This middle plate acts as a heat-blocking barrier that prevents direct heat transfer from the cooking cavity to the door, while the transparent front plate maintains user visibility. The middle plate is positioned to block heat without interfering with the viewing function of the transparent plate.
2Temperature
If air flow is directed through the door for cooling, then cooling of the door interior is improved, but foreign substances may enter through the flow path
Solution Approach 1:
The choke cover is provided with selective openings that allow air flow for cooling purposes while blocking foreign substances. The local quality of the choke cover is designed with specific opening patterns that permit thermal exchange but prevent contamination, creating different functional zones in the same component.
3Temperature
If a middle plate is added to block heat transfer, then heat transfer to the door is reduced, but device complexity increases
Solution Approach 1:
The middle plate is designed to serve multiple functions: it blocks heat transfer from the cooking cavity to the door, provides structural support for the transparent front plate, and helps define the air flow path for door cooling. By combining multiple functions into a single component, the overall device complexity is minimized while achieving heat blocking effectiveness.
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 prevents heat transfer to the door and handle, allows for cooling of the door interior using air flow, and prevents foreign substances from entering, while enabling user visibility into the cooking cavity.
Implementation Method 1
a middle plate located between the front plate and the door frame to block heat transferred from the cooking cavity to the front plate
Implementation Method 2
a cooling fan installed in the rear space to generate an air flow, wherein the air flow passes through a flow path formed between the front plate and the middle plate
Data Source
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AI summary
In order to provide a cooking apparatus capable of preventing heat generated from a cooking cavity from being transferred to the outside of a door or to a handle, the present invention discloses a cooking apparatus, comprising: a cooking cavity; and, a door opening and closing the cooking cavity and including a front plate, a door frame located at the rear of the front plate to block microwaves and a middle plate located between the front plate and the door frame to block heat transferred from the cooking cavity to the front plate.