Induction Cooktop Receiver Coil Layout for Uniform Wireless Heating
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Solution Overview
Problem
Existing wireless cooking appliances operated on induction heating cooktops face issues where the receiver coil at the base hinders energy transfer from the induction coil, preventing the appliance from being heated uniformly at user-adjusted power levels.
Innovation Solution
A receiver coil with planar spiral windings and gaps, embedded in a heat-resistant plastic coil casing with a spiral channel, is positioned to receive energy for control units without obstructing magnetic energy transfer to the base, using an outer and inner winding terminal system with an insulating layer and a cover to prevent short circuits, and integrated into the appliance base for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the receiver coil is disposed at the base of the cooking appliance to receive energy from the induction coil, then the control and communication units can be powered wirelessly, but the receiver coil hinders the energy transfer from the induction coil to the base
Solution Approach 1:
The receiver coil is segmented into multiple windings with gaps between them, allowing magnetic energy to pass through while still enabling sufficient energy reception for powering control units
Solution Approach 2:
The coil casing is made of heat-resistant plastic material with a spiral channel that provides thermal insulation and structural support, creating localized thermal management quality different from other parts of the appliance
2Ease of operation
If the receiver coil is positioned oppositely with the induction coil to receive desired energy, then wireless power transmission is enabled, but the appliance cannot be heated at the power level adjusted by the user
Solution Approach 1:
The receiver coil windings are divided with gaps between them, allowing the coil to receive sufficient power for electronic components while permitting adequate magnetic energy transmission for heating at user-adjusted power levels
Solution Approach 2:
The coil casing acts as an intermediary structure that houses the receiver coil while maintaining thermal and magnetic energy transfer properties, enabling both wireless operation and effective heating
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 ensures efficient energy transfer from the induction coil to the appliance base, allowing for uniform heating across all power levels, enhancing the heating performance of wireless cooking appliances.
Implementation Method 1
a receiver coil that partially receives the power generated by the induction coil in the induction heating cooktop whereon the appliance is operated and supplying the energy required for operating the control unit
Implementation Method 2
a base of ferromagnetic properties, enabling the appliance to be heated from the bottom with the magnetic energy transferred by the induction coil
Data Source
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AI summary
The present invention relates to a cooking appliance (1) suitable to be operated wirelessly on an induction heating cooktop (17) that has one or more than one induction coil (18), comprising a base (2) of ferromagnetic properties, enabling the appliance (1) to be heated from the bottom with the magnetic energy transferred by the induction coil (18), a control unit (3) having a microcontroller providing the controlling of the operating parameters like temperature, motor speed and communication with the cooktop (17) and the monitoring and communication means like the user interface, display, RFID and a receiver coil (4) that partially receives the power generated by the induction coil (18), providing the required energy for operating the control unit (3) and the additional components like the sensor, mixer motor placed thereon depending on the intended use of the appliance (1). The receiver coil (4) has one or more windings in a spiral form with gaps (A) therebetween, the windings being embedded in one or more channel (6) of a coil casing (7).