Electric range
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Solution Overview
Problem
Electric ranges face challenges in maintaining rigidity of brackets, ensuring efficient assembly, and improving electromagnetic compatibility (EMC) and electromagnetic interference (EMI) performance due to deformation under load or external forces.
Innovation Solution
The design incorporates a cover bracket system that couples a cover plate to the electric range case, featuring a unique configuration of casings and brackets to prevent deformation during assembly, enhancing rigidity and EMC/EMI performance by spacing upper brackets apart and using screw bolts for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If brackets are made with a plate-shaped structure to support components, then the structure is simple and easy to manufacture, but the brackets become deformed due to load or external force
Solution Approach 1:
The bracket is divided into multiple plates (first plate, second plate, third plate) connected together. Each plate can be manufactured separately and then assembled, maintaining ease of manufacture while the combined structure provides enhanced rigidity and load-bearing capacity compared to a single plate structure.
Solution Approach 2:
The bracket structure extends from a two-dimensional plate shape into three dimensions by adding multiple plates arranged in different orientations and positions. The first plate is disposed horizontally, the second plate vertically, and the third plate at an angle, creating a spatial framework that significantly improves rigidity while maintaining manufacturing simplicity.
2Strength
If brackets are made more rigid to prevent deformation, then structural integrity is improved, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
By segmenting the bracket into multiple plates with built-in coupling protrusions and recesses, the structure achieves high rigidity through its spatial configuration while enabling simplified assembly. The segmentation allows for modular assembly where plates are connected through predetermined coupling features rather than requiring complex fastening procedures.
Solution Approach 2:
The bracket plates incorporate self-aligning coupling protrusions and recesses that guide the assembly process. The components essentially assemble themselves through the geometric constraints of the coupling features, reducing the need for complex alignment procedures or specialized assembly tools.
3Strength
If upper brackets are coupled together to enhance support, then load-bearing capacity is improved, but deformation may occur during mounting process
Solution Approach 1:
The coupling protrusions and recesses are pre-formed on the bracket plates during manufacturing. This preliminary preparation of coupling features ensures that when assembly occurs, the components fit together without requiring force that could cause deformation, maintaining manufacturing precision while achieving the desired load-bearing capacity.
4Stability of the object's composition
If cover plate is securely mounted to case, then structural stability is improved, but EMC and EMI performance may deteriorate due to deformation
Solution Approach 1:
The bracket structure parameters (number of plates, their dimensions, spacing, and orientations) are optimized to achieve the right balance between structural stability and EMC/EMI performance. The parameters are designed so that the bracket provides sufficient support while maintaining appropriate spacing and geometric characteristics that minimize electromagnetic interference.
Data Source
AI summary
An electric range in one embodiment includes a case and a cover plate coupled to an upper end of the case to allow an object to be heated to be placed on an upper surface thereof The electric range further includes a plurality of heating parts disposed under the cover plate and configured to heat the object to be heated, an upper bracket disposed under the heating part and configured to support the heating part, a base bracket disposed under the upper bracket to allow a printed circuit board to be mounted thereon, and a cover bracket disposed outside the upper bracket and the case coupled to the case and configured to support the cover plate.