Flavor Source Sheet Heating Layout for Burn-Free Aerosol Delivery

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Solution Overview

Problem

Existing smoking systems do not efficiently deliver vapor or aerosol to the user, and there is a risk of the flavor source sheet burning due to inadequate heat conduction and airflow management.

Innovation Solution

A smoking system with a flavor inhaler that includes a flavor-generating article comprising a first flavor source sheet and a heating source, separated by heat conducting portions, with defined air flow paths to enhance airflow and heat conduction, using materials like carbonates, ceramics, carbon, and metals to prevent burning and improve delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If heat conducting portions are arranged between the flavor source sheet and heating source, then heat conduction efficiency is improved, but device complexity increases

Engineering Contradiction:
Improveheat conduction efficiencyVSAvoidstructure complexity
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

Heat conducting portions are introduced as intermediary components between the heating source and flavor source sheet. These portions serve as thermal mediators that transfer heat efficiently without requiring direct contact between the heating source and flavor material, thus improving heat conduction efficiency while managing structural complexity through modular design

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The heating interface is segmented into multiple heat conducting portions rather than a single continuous contact area. This segmentation allows for optimized heat distribution across the flavor source sheet while maintaining manageable structural complexity through repetitive modular units

Inventive Principle:
Principle #1Segmentation

2Productivity

If air flow path is provided between flavor source sheet and heating source, then vapor delivery efficiency is improved, but heat conduction effectiveness deteriorates

Engineering Contradiction:
Improvevapor delivery efficiencyVSAvoidheat conduction effectiveness
Core Design Contradiction:
ProductivityVSTemperature

Solution Approach 1:

Different regions of the flavor source sheet are assigned different qualities: areas with heat conducting portions for thermal processing and areas with air flow paths for vapor generation and delivery. This local differentiation allows simultaneous optimization of heat conduction where needed and vapor delivery where required

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The interface between heating source and flavor source sheet is segmented into distinct functional zones: heat conduction zones with heat conducting portions and air flow zones with flow paths. This segmentation enables independent optimization of thermal transfer and vapor transport functions

Inventive Principle:
Principle #1Segmentation

3Ease of manufacture

If flavor source sheet is heated directly, then heating simplicity is improved, but burning risk increases

Engineering Contradiction:
Improveheating simplicityVSAvoidburning risk
Core Design Contradiction:
Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

Heat conducting portions serve as intermediary thermal management components that distribute heat evenly across the flavor source sheet. This intermediary layer prevents direct intense heating that causes burning while maintaining the simplicity of the overall heating process through straightforward thermal conduction

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The heating process utilizes parameter changes in the heat conducting portions, which can be made from materials with specific thermal properties. These portions modify heat transfer parameters to prevent localized overheating and burning while maintaining overall heating efficiency

Inventive Principle:
Principle #35Parameter changes

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 system efficiently delivers vapor or aerosol to the user by optimizing airflow and heat conduction, preventing the flavor source sheet from burning, and maintaining consistent flavor generation throughout the smoking session.

Implementation Method 1

heat of the heating source is transmitted to the first flavor source sheet through the heat conducting portions

Methodology Applied
Scientific EffectHeat conduction: Conduction (thermal)

Implementation Method 2

a heating source for heating the flavor-generating article

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 3

the first flavor source sheet is capable of generating vapor or aerosol at the aerosol-generating face

Methodology Applied
Scientific EffectVapor generation: Evaporation

Data Source

PatentEP4691286A1Smoking system
Publication Date: 2026.02.11 JAPAN TOBACCO INC
  • EP4691286A1 patent drawingFigure 1~2
  • EP4691286A1 patent drawingFigure 3~4
  • EP4691286A1 patent drawingFigure 5~6

AI summary

This smoking system is provided with: a flavor inhaler; a flavor generating article that includes a first flavor source sheet; a heating source that heats the flavor generating article; two or more heat conduction parts that are disposed apart from each other between the first flavor source sheet and a first surface of the heating source; and a first air flow passage that is provided between the first flavor source sheet and the heating source.