Multi-Zone Aerosol Heater Layout for Flat Temperature Gradients
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Solution Overview
Problem
Existing aerosol provision devices for smokable materials, such as heat-not-burn products, face challenges in efficiently heating smokable materials to volatilize components without burning, and in maintaining a consistent temperature gradient for optimal aerosol production.
Innovation Solution
A handheld aerosol provision apparatus with a housing containing a heater arrangement, control circuitry, and power source, featuring a hollow cylindrical heater with multiple heating zones and sub-heating zones, and a thermal insulator to minimize heat loss, allowing for independent heating of smokable material zones and optimizing temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single heater segment is used to heat smokable material, then the device structure is simple, but the temperature distribution is uneven and heating efficiency is poor
Solution Approach 1:
The heater is divided into multiple heater segments arranged longitudinally within the housing, with each segment capable of independent temperature control. This segmentation allows different zones of the smokable material to be heated to different temperatures simultaneously, achieving uniform temperature distribution while maintaining reasonable structural complexity
Solution Approach 2:
Different heater segments are configured with different heating powers and control parameters to match the local heating requirements of the smokable material at different positions. The control circuitry adjusts each segment's temperature independently, applying local quality control to optimize overall heating uniformity
2Temperature
If multiple heater segments with independent control are used, then temperature distribution uniformity is improved, but the control system complexity increases
Solution Approach 1:
Temperature sensors are positioned to detect temperatures at different locations within the heating chamber, and the control circuitry uses this feedback information to dynamically adjust the power output of each heater segment. This closed-loop feedback control maintains consistent temperature gradients while managing system complexity through intelligent control algorithms
Solution Approach 2:
The control system dynamically adjusts the heating parameters of each segment based on real-time temperature measurements and user preferences. The system transitions from static to dynamic control, allowing the temperature profile to adapt during the heating process to maintain optimal consistency
3Productivity
If heating temperature is increased to volatilize components quickly, then aerosol production efficiency is improved, but the risk of burning the material increases
Solution Approach 1:
The heating process is segmented into multiple zones with different temperature levels. High-temperature segments efficiently volatilize components for aerosol production, while lower-temperature segments prevent burning. This spatial segmentation of temperature zones resolves the contradiction between productivity and safety
Solution Approach 2:
The system dynamically changes temperature parameters across different heater segments and over time. By optimizing the temperature profile - using higher temperatures briefly for efficient volatilization followed by controlled cooling - the system achieves high aerosol production efficiency while preventing material burning
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 apparatus effectively heats smokable materials to volatilize components without burning, maintaining a consistent temperature gradient, which enhances aerosol production and user experience by reducing the likelihood of 'hot puff' and ensuring even heating.
Implementation Method 1
a heater arrangement, which has a hollow cylindrical heater with a plurality of heating zones and sub-heating zones
Implementation Method 2
a thermal insulator to minimize heat loss
Implementation Method 3
heats smokable materials to volatilize components without burning, maintaining a consistent temperature gradient, which enhances aerosol production
Data Source
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AI summary
A method of manufacturing an aerosol provision apparatus for heating smokable material to volatilise at least one component of the smokable material, and said aerosol provision apparatus is described. The method comprises providing a heater arrangement (23) for heating smokable material contained in use within the apparatus (1), the heater arrangement comprising at least a first heating zone (220) and a second heating zone (230) for heating different portions of the smokable material, providing a temperature sensor (320, 330) for each of the first and second heating zones, each temperature sensor for providing temperature measurements to be used as input temperature measurements for a temperature control loop, the control loop for controlling the heater arrangement to heat its associated respective heating zone to a target temperature based on the input temperature measurements acquired by the associated temperature sensor, and positioning each temperature sensor in its associated heating zone at a respective position selected so that if the heating arrangement were to heat the first and second heating zones so that the temperature sensors measure the same pre-selected target temperature, a temperature gradient across the length of the heating zones between the temperature sensors would be optimised as being substantially flat.