Multi-frequency Inductive Heating Controller for Uniform Temperature
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current heating and cooling designs for chemical reaction chambers are inefficient due to heat conduction issues, leading to non-uniform temperature distribution and potential for undesirable chemical reactions, as heat from exterior sources must be significantly higher than desired temperatures within the chamber.
Innovation Solution
A system using multi-frequency controllers and inductive heating with oscillating, pulsed electrical signals and varying capacitance values to precisely heat specific depths of a module, allowing for uniform temperature control across the module's diameter by adjusting signal delivery parameters based on thermal sensor feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If exterior heaters are used to heat the chamber, then heating can be achieved, but heat conduction inefficiency causes non-uniform temperature distribution and excessive temperature differences
Solution Approach 1:
The patent replaces conventional conduction-based heating (mechanical/thermal contact) with electromagnetic induction heating. The induction coil generates an alternating magnetic field that directly induces eddy currents in the module, converting electromagnetic energy to thermal energy without requiring physical heat conduction through chamber walls. This eliminates the inefficient heat transfer path from exterior heaters through thin walls to the reaction chamber.
Solution Approach 2:
The patent introduces an induction coil as an intermediary component that couples the power source to the module through electromagnetic fields. The coil acts as a mediator that transfers energy wirelessly via magnetic coupling, allowing precise control of heating depth and temperature distribution without direct thermal contact or conduction through chamber structures.
2Temperature
If exterior heaters are used, then heating is possible, but the heaters must operate at much higher temperatures than desired, leading to inefficient operation and potential chemical decomposition
Solution Approach 1:
The patent applies local quality by using multi-frequency induction heating to target specific depths within the module. Different frequencies penetrate to different depths, allowing independent temperature control of the outer shell and inner reaction chamber. This enables precise temperature control at the reaction zone without requiring excessive temperatures elsewhere, preventing thermal degradation of chemicals.
Solution Approach 2:
The patent changes the frequency parameter of the electrical signals to control heating depth and temperature distribution. By adjusting frequency, the system optimizes penetration depth and heating efficiency for different module regions, enabling precise temperature control that maintains reaction conditions within safe limits and prevents chemical decomposition.
3Temperature
If multi-frequency signals are used to heat different depths, then uniform temperature control is achieved, but system complexity increases with multiple capacitors and signal interleaving
Solution Approach 1:
The patent uses periodic action by interleaving multiple electrical signals with different frequencies and duty cycles. The controller alternates between signals in a periodic manner, with each signal targeting a specific depth region. This time-division multiplexing approach achieves multi-depth heating control without requiring all frequency components to be active simultaneously, reducing peak power requirements and simplifying the capacitor switching architecture.
Solution Approach 2:
The patent applies dynamics by making the capacitor network dynamically reconfigurable. The controller selectively connects different capacitor combinations to the induction coil based on the required frequency and heating depth. This dynamic switching allows the system to adapt its electrical characteristics in real-time, optimizing heating performance for different operational conditions without requiring permanently dedicated circuits for each frequency.
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
Achieves uniform temperature distribution across the module's diameter, reducing temperature differences to less than 5°C, thereby optimizing chemical reaction conditions and preventing undesirable reactions.
Implementation Method 1
A system for heating a module (e.g., a container, receptacle, storage device, delivery device, reactor, or other module) via a coil to a target temperature using oscillating, pulsed electrical signals associated with unique frequencies and/or capacitance values
Implementation Method 2
A system using multi-frequency controllers and inductive heating with oscillating, pulsed electrical signals and varying capacitance values to precisely heat specific depths of a module
Data Source
AI summary
The present technology is directed to multi-frequency controllers for inductive heating and associated systems and methods. The systems can be configured to precisely heat a module via a coil to a target temperature using oscillating, pulsed electrical signals associated with unique frequencies and/or capacitance values. Each unique frequency can correspond to heating the module to a particular depth, relative to an outer surface of the module. A first pulsed electrical signal having a first frequency can heat the module to a first depth, and a second pulsed electrical signal having a second frequency can heat the module to a second depth different than the first depth. The system can include a thermal sensor for measuring a temperature associated with at least one of the module or a fluid associated with the module. Based on the temperature, the system can adjust signal delivery parameters of the first and/or second electrical signals.