Induction Hob Coupling Coil for Compact Power Supply
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Solution Overview
Problem
Existing household appliances require significant space and resources for power supply, especially in matrix hobs, where multiple heating units are needed, and existing power supply units are often inefficient and costly.
Innovation Solution
A household appliance device featuring a heating coil that partially or completely surrounds a coupling coil, allowing for efficient inductive energy transfer and reduced space requirements, with the coupling coil providing energy to both heating units and additional consumer units like lighting, using a compact and cost-effective power supply system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple heating units are arranged in a matrix hob to increase heating coverage, then the area coverage is improved, but the space requirement and power supply complexity increase
Solution Approach 1:
The coupling coil is designed to serve multiple functions: it provides inductive power supply to heating units and simultaneously powers additional consumer units such as lighting units. This multi-functionality allows a single coupling coil and power supply unit to support multiple heating zones and auxiliary functions, reducing the need for separate power supply systems for each heating unit and thereby reducing overall device complexity while maintaining high area coverage
Solution Approach 2:
The coupling coil is positioned to surround the heating coil, creating a nested configuration where the coupling coil encloses the heating coil. This nesting arrangement allows the coupling coil to efficiently couple with the heating coil while also providing space for additional consumer units such as lighting units to be integrated into the same structure, optimizing space utilization and reducing power supply complexity
2Power
If separate power supply units are used for each heating unit to ensure sufficient power, then the power output is improved, but the device complexity and cost increase
Solution Approach 1:
A single power supply unit connected to the coupling coil provides power to multiple heating units and additional consumer units simultaneously. The coupling coil efficiently distributes electromagnetic energy to meet the power requirements of multiple heating zones without requiring separate power supply units for each zone, thereby reducing device complexity and cost while maintaining sufficient power output
Solution Approach 2:
The power supply function for multiple heating units and additional consumer units is merged into a single integrated system. The coupling coil acts as a common interface that receives power from one power supply unit and distributes it to multiple heating coils and consumer units, eliminating the need for multiple separate power supply units and reducing overall system complexity
3Ease of operation
If additional consumer units like lighting units are added to provide visual feedback, then the ease of operation is improved, but the power consumption increases
Solution Approach 1:
The coupling coil provides inductive power supply to both heating units and additional consumer units such as lighting units from a single power source. This allows lighting units to be integrated into the system without requiring additional power supply infrastructure, enabling visual feedback functionality while managing power consumption through efficient inductive coupling and shared power distribution
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 enables a high coverage of hob plates with heating coils while minimizing space and power consumption, allowing the same power supply unit to be used across different appliances, reducing costs and enhancing ease of use with visual feedback from lighting units.
Implementation Method 1
a heating coil through which a high-frequency alternating current with a frequency of at least 1 kHz, in particular at least 10 kHz and advantageously at least 20 kHz, flows through it and preferably at least partially by means of induced alternating currents to heat a ferromagnetic body
Implementation Method 2
The heating coil is in particular part of an induction heating unit, which, in addition to the heating coil, additionally has at least one ferrite element and/or at least one carrying unit for the heating coil
Implementation Method 3
a coupling coil which is arranged coaxially around a circular disk-shaped heating coil and which is intended to inductively supply a lighting unit with energy
Data Source
Figure 1~3
Figure 4~6
AI summary
The device (28a) has a heater coil (10a) partially or completely engaging a coupling coil, where the heater and coupling coils are concentrically arranged. A heater coil surface (14a) of the heater coil and a coupling coil surface (16a) of the coupling coil are arranged at an angle of about 45 degrees with respect to each other. A longitudinal extension of the coupling coil is twice as large as a transverse extension of the coupling coil, which is perpendicular to the longitudinal extension. The longitudinal and transverse extensions are parallel to the coupling coil surface.