Alternating Dual-Coil Induction Heating for Rapid Low-Power Warm-Up
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heating systems in electronic devices, such as electronic cigarettes, take an undesirable amount of time to heat up and require increased power consumption for faster heating, which is inefficient.
Innovation Solution
An induction heating system using two induction coils wrapped around a metal cylinder, with alternating currents in opposite directions, controlled by a control circuit that manages power distribution and pulse generation to achieve rapid and efficient heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a heater is used to indirectly heat the final target, then the system structure is simple, but the heating time is excessive and power consumption increases for faster heating
Solution Approach 1:
The patent replaces the conventional resistive heating element (mechanical/thermal system) with an induction heating system using electromagnetic fields. The induction coil generates a time-varying magnetic field that induces eddy currents in the metal cylinder, which directly heats the target material. This substitution eliminates the need for indirect heat transfer through a heater, significantly reducing heating time while maintaining structural simplicity.
Solution Approach 2:
The patent employs alternating current (AC) through the induction coil, creating a time-varying magnetic field that periodically induces eddy currents in the metal cylinder. This periodic action allows for rapid heating by continuously regenerating the magnetic field, enabling faster heating rates without proportionally increasing power consumption. The AC frequency can be optimized to match the electrical properties of the metal cylinder for maximum heating efficiency.
2Speed
If the temperature is increased at a faster rate, then the heating speed improves, but the power consumption increases
Solution Approach 1:
The induction heating system replaces inefficient resistive heating with direct electromagnetic induction, where the time-varying magnetic field induces eddy currents that generate heat directly within the metal cylinder. This method achieves rapid heating speeds with lower power consumption because the energy is transferred directly to the target material through electromagnetic coupling, minimizing energy losses associated with indirect heating and thermal management.
Solution Approach 2:
The patent utilizes the electrical properties (conductivity, permeability) of the metal cylinder to optimize heating efficiency. By selecting appropriate AC frequencies and coil configurations, the system can induce optimal eddy current densities that maximize heating speed while minimizing power consumption. The parameters of the induction coil (turns, wire gauge, spacing) are optimized to match the electrical characteristics of the metal cylinder for efficient energy transfer.
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 system provides rapid and efficient heating with minimal power consumption by generating stable magnetic flux and optimizing energy use, maintaining consistent temperature through alternating coil currents.
Implementation Method 1
The hollow vessel may be surrounded by a first induction coil and a second induction coil. The first induction coil may carry a first current and the second induction coil may carry a second current, wherein the first current and the second current are generated in an alternating sequence.
Implementation Method 2
The first induction coil may carry a current in a first direction and the second induction coil may carry a current in an opposite, second direction. The currents may be generated in an alternating sequence.
Data Source
AI summary
Various embodiments of the present technology comprise a method and system for induction heating. The system may provide a first induction coil wrapped around a metal cylinder and a second induction coil wrapped around the metal cylinder. The first induction coil may carry a current in a first direction and the second induction coil may carry a current in an opposite, second direction. The currents may be generated in an alternating sequence.