Oven Door Frame Airflow Layout to Prevent Condensation Heating
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Solution Overview
Problem
Existing oven door designs fail to effectively manage airflow, leading to thermal inefficiencies and unwanted condensation, which results in the door overheating and uneven heat distribution.
Innovation Solution
The oven door design incorporates strategically placed entrance and discharge holes in the vertical and horizontal profiles, allowing air to circulate between panels without condensing, using the frame as an air channel to enhance heat distribution and reduce the frame's heat source effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air is allowed to circulate between panels to cool the door, then door temperature is reduced, but condensation occurs on the panels
Solution Approach 1:
The door structure is segmented into multiple functional zones: outer panel, intermediate panel, inner panel, and frame structure. Air circulation paths are segmented into distinct entrance and discharge zones, allowing controlled airflow that cools panels without creating condensation conditions.
Solution Approach 2:
The frame structure acts as an intermediary air channel between the panels. Entrance holes in the inner frame and discharge holes in the outer frame create a mediated airflow path that transports cool air through the door assembly, cooling the panels while preventing direct condensation on their surfaces.
2Temperature
If frame acts as structural support only, then manufacturing is simple, but frame becomes heat source increasing door temperature
Solution Approach 1:
The frame structure serves multiple functions simultaneously: it provides structural support for mounting panels, acts as a thermal barrier, and functions as an air circulation channel. The frame's hollow interior space is utilized as a conduit for cool air flow, transforming a potential heat source into a cooling element without adding separate components.
3Manufacturing precision
If air discharge is from single point, then structure is simple, but heat distribution on panels is uneven
Solution Approach 1:
Discharge holes are strategically positioned at specific locations on the outer frame (front and side surfaces) to create localized cooling zones. This distributed discharge configuration ensures that cool air is released at multiple points across the door assembly, achieving uniform heat distribution on the panels while maintaining relatively simple frame construction.
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 door, achieves homogeneous heat distribution, and reduces the time to reach desired temperature values by increasing heat transfer and preventing condensation, thus maintaining a safe temperature.
Implementation Method 1
the temperature of the door outer panel can be lowered to certain values due to the airflow inside the door
Implementation Method 2
the air that enters from under the door leaves from above the door
Implementation Method 3
the frame is used like an air channel by means of the profiles. This enables the air received inside the door to be discharged out without condensing on the panels
Implementation Method 4
The air that enters in between the panels can condense above the frame and this results in unwanted appearances
Data Source
Figure 1~2
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Figure 5~6
AI summary
The present invention relates to an oven (1 ) comprising a cooking chamber (2) wherein the items to be cooked are placed, a door (3) for accessing the cooking chamber (2), an outer panel (4) disposed on the door (3) forming the surface of the door (3) in contact with the exterior, an inner panel (5) forming the surface of the door (3) in contact with the cooking chamber (2), and a frame (7) disposed between the outer panel (4) and the inner panel (5), whereon the outer panel (4) is secured on one side and the inner panel (5) on the other side such that they are parallel to one another, having profiles (8) with quadrangular cross-sections, constructed by joining the profiles (8) in a "U" shape.