Wireless induction heating cooker having improved cooking uniformity
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Solution Overview
Problem
Existing wireless induction heating cookers suffer from cooking uniformity issues when partially misaligned on the working coil of an induction heating apparatus, leading to incomplete or uneven cooking due to misalignment between the power reception coil and the working coil.
Innovation Solution
The wireless induction heating cooker incorporates a design with multiple receiving coils on the bottom surface and lateral surface heating coils arranged along the internal pot's circumference, allowing for efficient heating of the pot's lateral surfaces using a magnetic field generated by the working coil, even when the cooker is partially aligned, by inducing electric currents and forming multiple heat delivery paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single power reception coil is used for wireless induction heating, then the device structure is simple, but cooking uniformity deteriorates when the cooker is misaligned on the working coil
Solution Approach 1:
The single power reception coil is divided into multiple receiving coils (first receiving coil and second receiving coil) arranged at different positions on the bottom surface. This segmentation allows each coil to independently receive magnetic flux from different regions of the working coil, ensuring that even when misaligned, at least some coils receive sufficient energy to maintain cooking uniformity.
Solution Approach 2:
The heating system is extended from a single-plane bottom heating configuration to a multi-dimensional arrangement by adding lateral surface heating coils that wrap around the side of the internal pot. This three-dimensional coil distribution creates multiple heat delivery paths, ensuring uniform cooking regardless of horizontal or vertical misalignment on the working coil.
2Manufacturing precision
If the cooker is manually aligned on the working coil, then alignment precision can be achieved, but user convenience deteriorates due to the complex alignment process
Solution Approach 1:
The system transitions from requiring static precise alignment to dynamically adapting to any position on the working coil. The multiple receiving coils are strategically positioned so that regardless of where the cooker is placed on the working coil, at least some coils will be in optimal magnetic coupling positions, automatically compensating for misalignment without user intervention.
Solution Approach 2:
The multi-coil configuration makes the heating system universal in its operation - it can effectively cook food regardless of the cooker's position on the working coil. The system maintains functionality across a range of positions rather than requiring a single precise alignment point, making the device universally usable without complex alignment procedures.
3Reliability
If multiple receiving coils are used to improve cooking uniformity, then cooking uniformity is improved, but device complexity increases
Solution Approach 1:
The multiple receiving coils are electrically connected in parallel to the power supply coil, creating a unified heating system. This merging approach allows the coils to work together as a single integrated unit, distributing the heating load across multiple coils while maintaining simple electrical connectivity and control architecture.
Solution Approach 2:
The lateral surface heating coils are arranged to wrap around the side of the internal pot, with some coils positioned at different heights and angles. This nested arrangement allows the coils to efficiently utilize the magnetic field in three-dimensional space around the pot, maximizing heating effectiveness while minimizing the number of coils needed compared to a fully surrounding configuration.
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 ensures cooking uniformity and efficient heat distribution, maintaining consistent temperatures across the internal pot regardless of its position relative to the working coil, enhancing user convenience without requiring precise alignment.
Implementation Method 1
Based on electromagnetic induction between the induction heating apparatus and the cooker, power may be transmitted from the induction heating apparatus to the cooker
Implementation Method 2
the power transmitted to the cooker may heat and cook an object in the cooker
Implementation Method 3
each of the plurality of lateral surface heating coils may be configured to supply induced electric current to heat the lateral surface of the internal pot
Implementation Method 4
heat the lateral surface of the internal pot based on the induced electric current
Data Source
AI summary
A wireless induction heating cooker is configured to operate on an induction heating apparatus. The wireless induction heating cooker includes a main body, an internal pot configured to be disposed in the main body, a plurality of receiving coils disposed at a bottom surface of the main body and arranged along a circumferential direction of the internal pot, and a plurality of lateral surface heating coils spaced apart from the bottom surface of the main body and arranged along a lateral surface of the internal pot. Each of the plurality of lateral surface heating coils is connected to one of the plurality of receiving coils that is disposed at an opposite side with respect to a reference line passing through the bottom surface of the main body.