Induction Hob Granular Shielding Container for Magnetic Field Control
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Solution Overview
Problem
Existing cooking appliances with induction heating systems face challenges in effectively shielding specific locations from magnetic fields generated by coils, leading to inefficient energy distribution and potential overheating issues.
Innovation Solution
A cooking appliance device featuring a shielding unit composed of granular material housed within a container that is strategically positioned to reduce the magnetic field strength by up to 50% at adjacent locations, combined with a coil carrier for compact design and secure storage, allowing for flexible placement and efficient energy management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding unit is introduced to reduce magnetic field strength at adjacent locations, then magnetic field shielding effectiveness is improved, but device complexity increases due to additional components (shielding unit, container, coil carrier)
Solution Approach 1:
The shielding unit is nested within a container that is itself mounted on a coil carrier, creating a hierarchical nested structure. The granular shielding material is contained within the container volume, which is positioned around the coil assembly. This nesting approach consolidates multiple functions (shielding, containment, mounting) into a compact integrated unit, reducing overall system complexity despite adding shielding capability.
Solution Approach 2:
The container acts as an intermediary structure between the coil carrier and the shielding unit. It provides a standardized mounting interface and structural support for the shielding material, simplifying the integration process. The container mediates the connection between the electrical components (coil) and the magnetic shielding components, making the overall system easier to assemble and manufacture.
2Ease of manufacture
If granular shielding material is used instead of dense blocks, then ease of manufacture is improved, but shielding effectiveness may be reduced due to movable individual grains
Solution Approach 1:
The shielding unit utilizes granular material with interstitial spaces between individual grains, creating a porous structure. This porous configuration maintains adequate magnetic shielding effectiveness while allowing the material to be easily manufactured and filled into the container. The granular nature enables simple pouring or injection filling processes rather than complex block attachment procedures.
Solution Approach 2:
The shielding unit employs composite construction by combining granular shielding material with the container structure. The container provides structural integrity and containment, while the granular material provides magnetic shielding properties. This composite approach allows each component to be optimized independently (container for structural ease, granular material for shielding) and then combined, achieving both manufacturability and 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
The solution provides durable and flexible shielding, optimizing energy distribution by minimizing stray fields and ensuring uniform heating, while reducing production complexity and costs.
Implementation Method 1
at least one shielding unit which is provided for this purpose, at least partially shield a location from a magnetic field generated by the coil
Implementation Method 2
at least one induction heating cable which is wound into a coil, in particular a flat coil, which is provided for generating a magnetic field
Data Source
Figure 1~2
Figure 3
AI summary
The invention is based on a cooking appliance device (10a-b), in particular a hob device, with at least one induction heating cable (20a-b) which is wound into a coil (14a-b) which is intended to generate a magnetic field, and with at least one shielding unit (12a-b), which is provided to at least partially shield at least one location from a magnetic field generated by the coil (14a-b). In order to advantageously further develop a generic device, it is proposed that the cooking appliance device (10a-b) comprises at least one container (16a-b) which is provided in an installation position for mounting the at least one shielding unit (12a-b).