Cooking appliance
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Solution Overview
Problem
Cooking appliances experience heat loss due to heat transfer from the cooking chamber to the front plate and door frame, leading to inefficient cooking.
Innovation Solution
The cavity assembly and door frame are redesigned with flange parts that line-contact or point-contact each other, reducing the contact area and enhancing structural support, thereby minimizing heat transfer and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cavity assembly and door frame are connected with large contact area, then structural strength is improved, but heat transfer and heat loss increase
Solution Approach 1:
The connection between cavity assembly and door frame is segmented into multiple discrete welding points rather than a continuous large-area contact. The flange parts are designed with specific welding positions that provide sufficient structural strength while minimizing the total contact area, thereby reducing heat transfer pathways.
Solution Approach 2:
The flange parts are designed with non-uniform thickness distribution, featuring thicker sections at welding locations for strength and thinner sections in between to reduce heat conduction. This local variation in quality optimizes both structural requirements and thermal insulation performance.
2Loss of energy
If the contact area between cavity assembly and door frame is reduced, then heat loss is minimized, but structural support may be compromised
Solution Approach 1:
The connection is divided into multiple strategic welding points distributed across the flange interfaces. This segmentation allows the structure to maintain strength through proper load distribution across multiple points while keeping the total contact area minimal for heat loss reduction.
Solution Approach 2:
The flange parts utilize composite construction with materials or structures that provide high strength-to-area ratio. The design incorporates rigid support elements concentrated at critical locations to ensure structural integrity despite reduced overall contact area.
3Loss of energy
If the front plate and door frame temperatures are kept low, then heat loss is reduced, but cooking efficiency may be affected
Solution Approach 1:
The thermal insulation design creates a temperature gradient where the front plate and door frame remain cool (reducing heat loss) while the cooking chamber interior maintains high temperatures (ensuring cooking efficiency). The flange structure and welding design locally manage heat flow to achieve this differential temperature distribution.
Solution Approach 2:
The flange parts act as thermal intermediaries that manage heat flow between the hot cooking chamber and the cooler external environment. The design of these intermediate structures controls thermal transmission to minimize losses while preserving cooking performance.
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 heat loss by maintaining lower temperatures on the front plate and door frame, improving cooking efficiency and reducing energy consumption.
Implementation Method 1
the first flange part and the second flange part line-contact each other... reducing heat transfer and leakage... maintains lower temperatures on the front plate and door frame
Data Source
AI summary
Provided is a cooking appliance. The cooking appliance includes a cavity assembly having a cooking chamber and a door that selectively opens or closes the cooking chamber. The cavity assembly includes a cavity including a plurality of plates defining a top surface, a bottom surface, and both side surfaces of the cooking chamber, wherein a first flange part is disposed on each of front end of the plurality of plates, and a front plate having an entrance opening through which food enters into the cooking chamber, the front plate including a second flange part. The first flange part and the second flange part line-contact each other.