Heating Coil Fixture Assembly for High-Temperature Stability
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Solution Overview
Problem
Cooking appliances with heating coils lack stability, particularly at high temperatures, and existing fixing devices do not effectively prevent movement between coils and carrier units, leading to potential functional restrictions and increased material and assembly costs.
Innovation Solution
A cooking appliance design featuring a carrier unit and a holding unit with separate, thermally matched holding elements that securely fix each winding of the heating coil to the carrier unit, preventing movement and ensuring stability even at high temperatures, while also simplifying assembly and reducing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixing device is used to hold heating coils, then the heating coil is mechanically fixed, but stability at high temperatures is insufficient and movement between coils and carrier unit occurs
Solution Approach 1:
The fixing device is divided into two separate units: a carrier unit that supports the heating coil and a holding unit that actively secures it. This segmentation allows each unit to be optimized for its specific function, with the holding unit comprising multiple holding elements distributed around the heating coil to prevent movement in various directions, thereby resolving the stability issue at high temperatures
Solution Approach 2:
The holding unit acts as an intermediary between the carrier unit and the heating coil, providing thermal matching through materials with compatible thermal expansion coefficients. This intermediary structure prevents direct thermal stress transmission that would cause movement, while maintaining secure mechanical fixation throughout temperature variations
2Ease of manufacture
If existing fixing devices are used, then assembly is possible, but material and assembly costs increase and movement is not prevented
Solution Approach 1:
The holding unit is designed with multiple holding elements that can accommodate heating coils of various geometries and sizes using the same basic structure. This universal design reduces the need for multiple specialized fixing devices, lowering material costs while maintaining ease of assembly across different applications
Solution Approach 2:
The carrier unit and holding unit are designed to work together as an integrated fixing system, where the holding unit combines multiple holding elements into a single assembly that can be installed as one component. This merging reduces the total number of separate parts needed, simplifying assembly procedures and reducing overall material requirements
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
The solution provides enhanced stability and secure fixation of heating coils with various geometries, allowing operation at high temperatures without functional restrictions, while reducing material and assembly costs through a simple and efficient design.
Implementation Method 1
the holding unit consists at least partially, preferably at least to a large extent and particularly preferably completely, of a material with a thermal expansion coefficient which is at least essentially identical to a thermal expansion coefficient of the heating coil
Data Source
Figure 1~2a
Figure 2b~2c
Figure 2d~2e
AI summary
The invention relates to a cooking device comprising at least one heating coil (10a - 10d), which has at least two windings (12a - 12d, 13a - 13d), and at least one fixing device (14a - 14d), which at least partly mechanically fixes the heating coil (10a - 10d) in an assembled state. The aim of the invention is to increase stability at high operating temperatures and reduce production costs. This is achieved in that the fixing device (14a - 14d) comprises a support unit (16a - 16d) and a retaining unit (18a - 18d) which fixes each of the windings (12a - 12d. 13a - 13d) to the support unit (16a - 16d) separately in the assembled state.