Induction Coil Energy Pulsing for Sensorless Aerosol Heating
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Solution Overview
Problem
Existing aerosol generating devices rely on temperature sensors and preset temperature curves for heater control, which are prone to inaccuracies leading to insufficient or excessive heat absorption by the aerosol generating substrate, affecting taste and inhalation experience.
Innovation Solution
A control method that divides the baking process into multiple time periods, providing energy to the induction coil in the form of high-frequency driving pulses based on a mapping relationship between time and energy parameters, eliminating the need for real-time temperature measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensor and preset temperature curve are used for heater control, then the heater temperature can be regulated, but the temperature control accuracy is insufficient and leads to insufficient or excessive heat absorption by the aerosol generating substrate
Solution Approach 1:
The patent replaces the temperature sensor-based feedback control system with an induction heating system that uses electromagnetic fields to directly heat the aerosol generating substrate. The controller regulates the induction heater's power output based on pre-set temperature curves without requiring real-time temperature measurement, thereby eliminating temperature sensor inaccuracies and achieving more consistent heat absorption.
Solution Approach 2:
The patent changes the control parameter from temperature feedback (which requires accurate sensing) to power output regulation of the induction heater. By controlling the electrical power supplied to the induction heater according to pre-determined temperature curves, the system achieves precise thermal control without relying on temperature measurement accuracy.
2Ease of operation
If temperature sensor is used for real-time temperature collection, then power can be regulated based on deviation from ideal temperature, but the system depends on temperature sensor accuracy and temperature curve reasonableness
Solution Approach 1:
The patent extracts and removes the temperature sensor from the control system. Instead of using temperature feedback, the system directly controls the induction heater's power output based on pre-set operating parameters and time-based temperature curves, eliminating the dependency on temperature sensing hardware and its associated accuracy issues.
Solution Approach 2:
The induction heating system operates in a self-regulating manner where the controller automatically adjusts power delivery based on pre-programmed temperature curves and timing, without requiring external temperature measurement feedback. The system serves itself by using internal timing and power regulation to achieve the desired thermal profile.
3Ease of manufacture
If conventional heater control method is used, then the system structure is simpler, but the taste and inhalation experience are affected due to inaccurate temperature control
Solution Approach 1:
The patent replaces conventional resistive heating with induction heating technology, which uses electromagnetic fields to directly induce currents in the aerosol generating substrate holder, achieving more precise and efficient heating. This substitution maintains relative system simplicity while dramatically improving temperature control precision and aerosol generation quality.
Solution Approach 2:
The patent changes the heating mechanism from conventional resistive heating to induction heating, altering the fundamental physical parameter of heat transfer. This enables more precise control over heating rate and temperature distribution, improving aerosolization efficiency and product quality without significantly increasing system complexity.
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 approach ensures consistent aerosol generation with improved taste and inhalation experience by adapting energy supply to the baking process requirements, reducing hardware costs and avoiding inaccuracies in temperature measurement.
Implementation Method 1
an induction coil configured to generate a changing magnetic field when a changing current flows and a sensor configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat
Implementation Method 2
The induction heater assembly including an induction coil configured to generate a changing magnetic field when a changing current flows
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A control method and an aerosol generating device. The control method (S100) comprises: when receiving a heating starting instruction, on the basis of mapping relationships between time periods and energy parameters, respectively controlling, within a plurality of time periods, a power supply to provide corresponding energy for an induction coil, wherein the energy provided in each time period is composed of a plurality of high-frequency drive pluses, and the duration of the time period is greater than or equal to 500 ms (S10). Compared with conventional control modes depending on the real-time temperature of a heater and a temperature curve, the present control mode involves control of energy supply in different time periods; thus, the taste and vaping experience can be improved, dependence on temperature measurement devices can be eliminated, and hardware costs can be effectively reduced.