HNB Compression Assembly for Uniform Aerosol Substrate Heating
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Solution Overview
Problem
Existing heat-not-burn aerosol-generating devices face challenges in efficiently and uniformly heating aerosol-forming substrates without combustion, leading to inconsistent aerosol production and inefficient use of plant material.
Innovation Solution
The device incorporates a compression assembly with a compression plate and actuator to adjustably compress the aerosol-forming substrate against a heated surface, coupled with a control system to manage substrate compression and heating based on feedback from sensors, ensuring consistent aerosol generation and improved heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the aerosol-forming substrate is heated without compression, then the device structure is simpler, but the heating efficiency is insufficient and aerosol production is inconsistent
Solution Approach 1:
A compression plate is introduced as an intermediary component between the heating element and the aerosol-forming substrate. The compression plate applies uniform pressure to the substrate, improving thermal contact and heating efficiency while maintaining a relatively simple overall device structure.
Solution Approach 2:
The compression force applied to the aerosol-forming substrate is adjusted as a controllable parameter. By varying the compression level, the device optimizes thermal contact between the substrate and heating surface, thereby improving heating efficiency and aerosol generation consistency without requiring complex structural modifications.
2Manufacturing precision
If the aerosol-forming substrate is loosely packed, then the device operation is simpler, but the heat transfer efficiency is poor and aerosol properties are inconsistent
Solution Approach 1:
The system automatically adjusts the compression force applied to the aerosol-forming substrate based on feedback from sensors that monitor aerosol generation parameters. This self-regulating mechanism ensures consistent aerosol production without requiring manual intervention to adjust substrate packing, maintaining ease of operation while improving precision.
Solution Approach 2:
Sensors monitor aerosol generation parameters and provide feedback to a control system, which adjusts the compression force accordingly. This closed-loop control ensures consistent aerosol properties while automating the compression adjustment process, eliminating the need for manual substrate packing adjustments.
3Use of energy by moving object
If the compression force is increased to improve heat transfer, then the heating efficiency improves, but the risk of combustion increases
Solution Approach 1:
The compression force is made dynamically adjustable rather than fixed. The system continuously monitors heating parameters and aerosol generation, automatically adjusting the compression force to optimize heat transfer while maintaining conditions below the combustion threshold. This dynamic control allows efficient heating while preventing harmful combustion effects.
Solution Approach 2:
A feedback control system monitors temperature and aerosol generation parameters in real-time, adjusting the compression force to maintain optimal heating efficiency while preventing combustion. When temperature approaches combustion thresholds, the system automatically reduces compression force, thereby eliminating combustion risk while preserving heating efficiency within safe operating ranges.
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 solution enhances aerosol generation efficiency by maintaining uniform substrate compression and temperature control, resulting in consistent aerosol properties and improved heating efficiency.
Implementation Method 1
The heater may be configured to generate heat that is transmitted to the first surface to cause the aerosol-forming substrate to form an aerosol without any combustion of the aerosol-forming substrate
Implementation Method 2
The compression actuator may be configured to move the compression plate through the enclosure to adjustably compress the aerosol-forming substrate in the first region against the first surface and maintain the compression of the aerosol-forming substrate
Implementation Method 3
The compression actuator may include a spring configured to exert a spring force to push the compression plate towards the first surface
Implementation Method 4
The compression actuator may include a screw actuator configured to cause linear motion of the compression plate towards the first surface based on rotation of a nut in a screw shaft
Implementation Method 5
heating an aerosol-forming substrate to a temperature that is sufficient to release constituents of the aerosol-forming substrate while keeping the temperature below a combustion point of the aerosol-forming substrate
Data Source
AI summary
An aerosol-generating device includes a heating chamber structure, a heater coupled to the heating chamber structure, and a compression assembly. The heating chamber structure defines a fixed-volume enclosure and is configured to hold an aerosol-forming substrate within a first region of the enclosure. The heater is proximate to a first surface that at least partly defines the first region and is configured to generate heat that is transmitted into the first region to cause the aerosol-forming substrate to form an aerosol without any combustion. The compression assembly includes a compression plate and a compression actuator. The compression plate and the first surface define opposing boundaries of the first region. The compression actuator moves the compression plate through the enclosure to adjustably compress the aerosol-forming substrate in the first region against the first surface.