Electronic Cigarette Induction Heating with Dual PID Temperature Control
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Solution Overview
Problem
Conventional electronic cigarettes take a long time to reach the target preheating temperature, resulting in delayed aerosol production and poor user experience.
Innovation Solution
A control method using a combination of PID algorithms and electromagnetic heating, where a rapid response PID algorithm is employed to quickly heat the smoking article to a preheating temperature and a slow response PID algorithm is used to maintain a target smoking temperature, reducing the preheating time to around 3-4 seconds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional heating control modes are used, then the heating device can maintain stable temperature, but it takes a long time (20-40 seconds) to reach the target preheating temperature
Solution Approach 1:
The patent applies dynamic control by switching between two different PID algorithms based on the heating stage. In the first stage (rapid heating phase), a first PID algorithm with aggressive parameters is used to quickly raise the temperature. In the second stage (maintenance phase), a second PID algorithm with conservative parameters is used to maintain the target temperature. This dynamic switching resolves the contradiction by using different control strategies for different phases of the heating process.
Solution Approach 2:
The heating process is divided into two distinct stages: a first stage for rapid temperature increase and a second stage for temperature maintenance. This segmentation allows the system to optimize control parameters for each specific phase, using a more aggressive control approach initially and then transitioning to a stable maintenance mode, thereby reducing overall preheating time while maintaining temperature stability.
2Loss of time
If high power is used to heat quickly, then the preheating time is reduced, but the temperature control precision may deteriorate
Solution Approach 1:
The system dynamically adjusts the control strategy based on the heating stage. During the first stage, high power is applied with a PID algorithm tuned for rapid response, accepting some temperature fluctuation for the sake of speed. During the second stage, the system transitions to lower power with a PID algorithm optimized for precision, ensuring accurate temperature maintenance. This dynamic adaptation resolves the contradiction between heating speed and temperature control precision.
Solution Approach 2:
The temperature control process is segmented into two phases with different control objectives. The first phase focuses on rapid heating with less stringent precision requirements, while the second phase focuses on precise temperature maintenance. By separating these objectives into distinct segments, the system can optimize each phase independently, achieving both fast preheating and accurate temperature control.
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 significantly reduces the time needed to generate aerosol, providing an in-time smoking experience and improving the overall usability of electronic cigarettes.
Implementation Method 1
activating the electromagnetic heating component to output a predetermined output power at a first stage
Implementation Method 2
the electromagnetic heating component at least including an induction coil and a heating device
Implementation Method 3
so that the heating device heats up
Implementation Method 4
receiving temperature information of the heating device collected in real time by a temperature sensor
Implementation Method 5
a preheating temperature, the preheating temperature being greater than a critical temperature at which a tobacco material in the smoking article is heated to aerosolize
Implementation Method 6
heated to aerosolize
Data Source
AI summary
The present disclosure relates to electronic cigarettes, and in particular to a control method of an electronic cigarette and an electronic cigarette. The method includes: activating an electromagnetic heating component to output a predetermined output power at a first stage, so that a heating device heats up; feedback controlling the output power of the electromagnetic heating component through a first PID algorithm according to the temperature information of the heating device and a preset preheating temperature, so that the heating device reaches the preheating temperature; and after the heating device reaches the preheating temperature, adjusting the output power of the electromagnetic heating component at a second stage, so that the heating device keeps a target smoking temperature, the target smoking temperature being less than the preheating temperature. The control method of the electronic cigarette provided in the embodiment adopts a combination of PID algorithms and electromagnetic heating.