Induction Cooktop Resonance Unit Phase-Delayed Drive
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Solution Overview
Problem
Induction hobs lack improved comfort due to audible acoustic phenomena caused by frequency differences between heating frequency units, and existing designs are inefficient in power supply and component usage.
Innovation Solution
The induction heating device employs a resonance unit and control unit to operate induction heating units in a phase-delayed drive mode, using a single phase power module with two heating frequency units connected via induction heating units, and includes switching units for flexible operation and alternating modes to minimize frequency differences and optimize power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple heating frequency units operate at different frequencies, then power supply flexibility is improved, but audible acoustic phenomena occur due to frequency differences
Solution Approach 1:
The patent synchronizes the operating frequencies of multiple heating frequency units to be identical, eliminating the frequency difference that causes audible acoustic phenomena. This parameter change (making frequencies equal) resolves the contradiction while maintaining the ability to supply power to multiple heating zones independently through the phase-delayed drive mode.
2Adaptability or versatility
If separate power supplies are used for each heating zone, then operational independence is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges multiple heating frequency units into a single synchronized power supply system that operates at one frequency. This unified approach reduces device complexity and cost compared to using completely separate power supplies, while still allowing independent control of different heating zones through phase-delayed drive mode and selective activation of individual units.
Solution Approach 2:
The single synchronized power supply system serves multiple heating zones simultaneously, making it a universal power source that can operate different heating elements independently. This multi-functional approach eliminates the need for separate dedicated power supplies for each zone, reducing overall system complexity while maintaining operational independence.
3Productivity
If resonance units are added to each heating zone, then heating efficiency is improved, but component quantity and cost increase
Solution Approach 1:
The patent implements a shared resonance unit that serves multiple heating frequency units simultaneously. This single resonance capacitance structure provides resonance enhancement to all connected heating zones, eliminating the need for separate resonance units for each heating element. This approach maintains high heating efficiency while significantly reducing the quantity of resonance capacitance components required.
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 configuration enhances comfort by eliminating audible acoustic phenomena, reduces component costs, and provides flexible operation with improved power management, ensuring efficient and quiet induction heating.
Implementation Method 1
The induction heating unit is supplied with high-frequency alternating current... the induction heating element is intended to convert electrical energy into an alternating magnetic field, which is intended to cause eddy currents and/or magnetic reversal effects in a metallic, preferably at least partially ferromagnetic, heating medium, in particular a cooking utensil, which are converted into heat
Implementation Method 2
the induction heating element is intended to convert electrical energy into an alternating magnetic field, which is intended to cause eddy currents and/or magnetic reversal effects in a metallic... heating medium... which are converted into heat
Implementation Method 3
the induction heating element is intended to convert electrical energy into an alternating magnetic field, which is intended to cause eddy currents and/or magnetic reversal effects in a metallic, preferably at least partially ferromagnetic, heating medium
Implementation Method 4
eddy currents and/or magnetic reversal effects in a metallic... heating medium... which are converted into heat
Implementation Method 5
The invention is based on an induction heating device... with a resonance unit, to which the two induction heating units are assigned... a resonance unit is to be understood in particular as a unit that includes at least one resonance capacitance
Data Source
AI summary
The invention relates to an induction heating device, in particular an induction cooktop device, with at least a first and a second heating frequency unit (30, 32), at least a first induction heating unit (20, 22, 24, 26) associated with the first heating frequency unit (30, 32), and at least a second induction heating unit (20, 22, 24, 26) associated with the second heating frequency unit (30, 32). To increase comfort, it is proposed that the induction heating device include a resonance unit (80, 81) to which the two induction heating units (20, 22, 24, 26) are associated.