Aerosol Delivery Component With Conductive Sheet Heating

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Solution Overview

Problem

Existing vaping smoking substitute systems suffer from inefficient vaporization of e-liquid due to air gaps between heating filaments and wicks, leading to audible 'spitting' noises and reduced flavor quality.

Innovation Solution

The use of a tubular ceramic wick with a sheet of absorbent, electrically-conductive material as the heating element, providing increased contact surface and reducing turbulent airflow, enhances vaporization efficiency and flavor delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a coiled heating filament is used around a wick, then the heating element can be formed, but air gaps are created between the heating filament and wick which disrupt thermal energy transfer

Engineering Contradiction:

Improvethermal energy transfer efficiencyVSAvoidheating element structure

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical coiled filament structure with an electrically conductive absorbent material that can be directly applied to the wick surface. This substitution eliminates the physical air gaps inherent in coiled structures while maintaining the heating function through electrical resistance heating of the conductive material in direct contact with the wick.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The heating element is implemented as a thin sheet or coating of electrically conductive absorbent material that conforms to the wick surface. This thin-film approach ensures intimate contact with the wick while providing the necessary heating function, eliminating the volumetric air gaps problem associated with coiled filaments.

Inventive Principle:

Principle #30Flexible shells and thin films

2Object-affected harmful factors

If a coiled heating filament is used, then heating function is provided, but turbulent airflow is created causing audible spitting noises

Engineering Contradiction:

Improveaudible spitting noisesVSAvoidheating function

Core Design Contradiction:

Object-affected harmful factorsVSPower

Solution Approach 1:

The patent replaces the mechanical coiled filament structure that creates turbulent airflow with a thin-film conductive material applied directly to the wick. This substitution maintains the heating power through electrical resistance while eliminating the turbulent flow patterns that cause audible spitting noises.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If air gaps exist between heating filament and wick, then the heating element structure is formed, but vaporization efficiency is reduced

Engineering Contradiction:

Improvevaporization efficiencyVSAvoidheating element configuration

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent replaces the traditional mechanical coiled filament configuration with an electrically conductive absorbent material that forms a continuous thermal pathway to the wick. This substitution maximizes vaporization efficiency by eliminating air gaps while simplifying the overall heating element configuration.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The thin-film conductive material conforms to the wick surface geometry, ensuring maximum contact area for efficient heat transfer. This thin-film approach eliminates the volumetric air gaps inherent in coiled structures while maintaining structural integrity and simplifying the heating element design.

Inventive Principle:

Principle #30Flexible shells and thin films

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 configuration results in smoother vapor production with reduced spitting and improved flavor, offering a more satisfying user experience.

Implementation Method 1

the heating element comprises a sheet of absorbent, electrically-conductive material... enhances vaporization efficiency

Methodology Applied

Scientific EffectVaporization: Evaporation

Implementation Method 2

a tubular ceramic wick defining a vaporiser portion of the air flow path... increased contact surface

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 3

the heating element comprises a sheet of absorbent, electrically-conductive material... electrical energy is supplied from the power source to the heater

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentEP4408206B1Aerosol delivery component

Publication Date: 2025.10.29 IMPERIAL TOBACCO LTD

Figure 1A~1C
Figure 2A~2B
Figure 3

AI summary

Disclosed is an aerosol-delivery component comprising a vaporiser in fluid communication with a reservoir for storing a liquid aerosol precursor and an air flow path extending from an inlet of the component to an outlet of the component. The vaporiser comprises a tubular ceramic wick defining a vaporiser portion of the air flow path through the vaporiser. The vaporiser further comprises a heating element within the vaporiser portion of the air flow path wherein the heating element comprises a sheet of absorbent, electrically-conductive material.