Induction Cooking Container with Open-Loop Energy Recovery Support
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Solution Overview
Problem
Existing cooking vessels with energy recovery devices for induction heating suffer from degradation of conductive elements due to induced current heating, leading to unreliable and short-lived operation.
Innovation Solution
A cooking vessel with an energy recovery device featuring an open-loop support and radially extending extensions, where the conductive element is fixed by deposition to prevent induced current circulation, and an insulating layer resistant to high temperatures, ensuring the support does not overheat and the conductive element remains durable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a closed loop support is used in the energy recovery device, then the structural integrity and rigidity are improved, but the support heats up due to induced current circulation causing degradation of the conductive element
Solution Approach 1:
The closed loop support is segmented into an open loop configuration with two free ends, breaking the continuous conductive path. This prevents circulation of induced currents while maintaining the structural framework, thereby eliminating Joule heating of the support without completely compromising structural integrity through strategic placement of non-conductive materials at the gap locations
2Manufacturing precision
If the conductive element is fixed by deposition to the support, then the manufacturing precision and reliability are improved, but the conductive element degrades due to heating from induced currents in the support
Solution Approach 1:
The harmful function of current circulation in the support is extracted and eliminated by transforming the closed loop into an open loop. The support structure is separated from the energy recovery function, allowing the conductive element to perform energy recovery without the support generating harmful heat that would degrade the deposited conductive material
Solution Approach 2:
The support structure combines conductive materials (for maintaining electrical field distribution) with non-conductive materials (at the gap locations to prevent current circulation). This composite approach allows the support to provide structural integrity and maintain necessary electrical properties without generating harmful induced currents that would degrade the conductive element
3Duration of action of stationary object
If an open loop support with extensions is used, then the lifetime of the conductive element is improved by preventing induced current circulation, but the device complexity increases
Solution Approach 1:
The support structure transitions from a static closed loop to a dynamic open loop configuration where the gap position and extension geometry can be optimized for different application scenarios. This allows the same basic open loop design to adapt to various structural requirements without fundamentally changing the principle of preventing current circulation
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 prevents overheating of the support and extends the lifespan of the conductive element, enabling reliable and repetitive energy recovery while maintaining a simple and economical design.
Implementation Method 1
energy recovery device generating electricity from a magnetic flux produced by the induction heating means
Implementation Method 2
induction heating means
Implementation Method 3
the closed loop of the support, when it is immersed in the magnetic flux produced by the induction heating means, is the seat of an induced current which causes heating by the Joule effect of the closed loop of the support
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a cooking container (1) comprising a bowl (2) that includes a base (3), a side wall (4) and an energy recovery device (10) intended to engage with an induction heating means, said energy recovery device (10) comprising a rigid holder (11) that is separate from the bowl (2), is in the shape of a loop and is arranged on the base (3), and at least one electrically insulated conductive element (20) attached to the holder (11) by means of deposition, in particular by means of screen printing, pad printing, thermal spraying, decalcomania or laser sintering. According to the invention, the holder (11) comprises an open loop (14) comprising two free ends (17a, 17b) and two extensions (15, 6) that extend radially and without touching one another, starting at the two free ends (17a, 17b), from the base (3) towards the side wall (4), and the conductive element (20) is attached to the open loop (14) and to the two extensions (15, 16) by means of deposition.