Susceptor Heating Control Using Dual Feedback and DC Current Sensing
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Solution Overview
Problem
Heating-type aerosol generating devices require efficient and stable battery use, along with precise temperature control to provide a satisfactory smoking experience, but existing systems face inefficiencies and instability in power usage and temperature convergence.
Innovation Solution
Implementing dual feedback control that combines temperature-based and power-based feedback mechanisms to monitor and adjust heater performance, using a DC/DC converter, power conversion unit, current sensing, and a controller for precise temperature and power estimation and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high power is used for heating operation of the heater, then heating effectiveness is improved, but battery efficiency and stability deteriorate
Solution Approach 1:
The patent implements dual feedback control mechanisms: temperature-based feedback control that monitors susceptor temperature and adjusts power accordingly, and power-based feedback control that monitors DC current and adjusts power supply. This feedback system enables precise temperature control while preventing excessive power consumption, thereby maintaining battery stability during high-power heating operations
Solution Approach 2:
The system dynamically adjusts the heating power based on real-time temperature and power monitoring. The controller modifies the power supply to the heater according to the current temperature of the susceptor and the power consumption status, enabling adaptive power management that optimizes both heating effectiveness and battery efficiency
2Measurement precision
If feedback control is performed to control heating temperature, then temperature control precision is improved, but unnecessary power consumption increases and battery efficiency deteriorates
Solution Approach 1:
The patent implements dual feedback control mechanisms: temperature-based feedback control that monitors susceptor temperature and adjusts power accordingly, and power-based feedback control that monitors DC current and adjusts power supply. This feedback system enables precise temperature control while preventing excessive power consumption, thereby maintaining battery stability during high-power heating operations
Solution Approach 2:
The system changes the control parameters by implementing both temperature-based feedback and power-based feedback control. By monitoring both temperature and power consumption parameters simultaneously, the system can adjust heating power more efficiently, achieving precise temperature control while minimizing unnecessary power consumption
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
Enhances power usage efficiency and stability by ensuring precise temperature control, improving the overall performance and user experience of aerosol generating devices.
Implementation Method 1
an induction coil and a susceptor, the induction coil being configured to generate an alternating magnetic field due to the AC current
Implementation Method 2
the susceptor being configured to, by being induced by the alternating magnetic field, heat an aerosol generating article inserted into the aerosol generating device
Data Source
AI summary
Provided are an aerosol generating device and a method of controlling the aerosol generating device. The aerosol generating device and the method include sensing, by a current sensing unit connected between a DC/DC converter and a power conversion unit, the DC current output from the DC/DC converter, performing, by a controller, temperature monitoring for estimating, based on the sensed DC current, a temperature of a susceptor of a heating unit and power monitoring for estimating, based on the sensed DC current, power supplied from the DC/DC converter to the power conversion unit, and performing, by the controller, at least one of temperature-based feedback control and power-based feedback control for the DC/DC converter, based on results of the temperature monitoring and the power monitoring.