Heat-Not-Burn Heating Control for Fast Preheating
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Solution Overview
Problem
Existing heat not burn devices have long preheating times, typically exceeding 30 seconds, leading to poor user experience due to delayed inhalation readiness.
Innovation Solution
A heating control method for heat not burn devices that includes heating the heating component at a first power within a preset time and then controlling the power supply to follow a preset temperature curve, using PID control algorithms to maintain the heating component's temperature close to a target curve, with prompt signals for inhalation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the heating component is heated using traditional constant power control, then the temperature control is simple, but the preheating time is long (more than 30 seconds)
Solution Approach 1:
The patent applies dynamic heating control by switching from constant power heating to temperature curve-based power adjustment. The control module dynamically modifies the heating power according to the current heating stage and temperature curve requirements, enabling the system to adapt heating parameters in real-time rather than using fixed constant power control.
Solution Approach 2:
The patent implements periodic action through multi-stage heating control. The heating process is divided into distinct stages (preheating stage with first temperature curve, second stage with second temperature curve), and the control module periodically switches between different heating strategies based on the current stage, optimizing the heating process at each phase.
2Speed
If the heating power is increased to shorten preheating time, then the heating speed increases, but the temperature may overshoot the target curve
Solution Approach 1:
The patent employs feedback control through the control module that continuously monitors the heating process and compares the actual temperature curve with the target temperature curve. Based on this feedback, the control module dynamically adjusts the heating power to ensure the temperature follows the target curve without significant overshooting, even when heating at high power.
Solution Approach 2:
The system uses dynamic power adjustment where the heating power is not fixed but continuously adapted based on real-time temperature measurements and the current heating stage. This dynamic control enables the system to rapidly heat while maintaining temperature precision by adjusting power in response to actual temperature deviations.
3Ease of operation
If a single temperature curve is used for the entire heating process, then the control is simple, but the aerosol generation quality is inconsistent
Solution Approach 1:
The patent segments the heating process into multiple stages, each with its own optimized temperature curve. The first temperature curve is used during the preheating stage to rapidly heat the heating component, while the second temperature curve is applied in the second stage to maintain optimal temperature for consistent aerosol generation. This segmentation allows different heating strategies for different phases of the process.
Solution Approach 2:
Different temperature curves are applied to different heating stages based on the specific requirements of each phase. The preheating stage requires aggressive heating with a steeper temperature curve, while the subsequent stage requires more controlled heating with a different curve to maintain aerosol quality. Each stage receives locally optimized heating parameters.
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 method significantly shortens preheating time and enhances user experience by ensuring consistent aerosol generation without overshooting, providing timely inhalation readiness and consistent vaping quality.
Implementation Method 1
the surface of the heating element is covered with an infrared radiation layer; the heating element is powered on to excite the infrared radiation layer to radiate infrared light waves
Implementation Method 2
the heating element is powered on to excite the infrared radiation layer
Data Source
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Figure 5
AI summary
Embodiments of the present disclosure disclose a heat not burn device and a heating control method therefor. The heating control method includes: heating, by the power supply, a heating component at first power within preset time for starting heating; and after the preset time, controlling the power supplying of the heating component to cause the temperature of the heating component to vary based on a preset temperature curve. The heating control method of the embodiments of the present disclosure can effectively shorten preheating time of an aerosol generating substrate and provide a user experience.