Frangible Capsule Retention Medium for Uniform Aerosol Heating

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing heated aerosol-generating systems face issues such as overheating, uneven heating of aerosol-forming substrates, and hygiene concerns, particularly in e-cigarette systems, which affect consistency and user safety.

Innovation Solution

An electrically operated aerosol-generating system with a heat diffuser comprising a porous body that absorbs heat from an electric heating element, allowing air to be heated indirectly and evenly, reducing overheating and providing consistent aerosol production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If direct heating of aerosol-forming substrate is used, then heating efficiency is improved, but overheating and hot spots occur causing uneven heating

Engineering Contradiction:

Improveheating efficiencyVSAvoidtemperature uniformity

Core Design Contradiction:

Use of energy by moving objectVSTemperature

Solution Approach 1:

A heat diffuser is introduced as an intermediary component between the heating element and the aerosol-forming substrate. The heat diffuser receives heat from the heating element and distributes it uniformly across its surface, preventing direct concentrated heating of the substrate and eliminating hot spots while maintaining heating efficiency.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The heat diffuser is made of porous material that allows heat to spread through its structure and be distributed evenly across the surface contact with the aerosol-forming substrate. The porous structure increases surface area and promotes uniform heat distribution, preventing localized overheating.

Inventive Principle:

Principle #31Porous materials

2Use of energy by moving object

If heating element is in direct contact with substrate, then heat transfer is improved, but hygiene issues arise from contamination

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidhygiene contamination

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The heat diffuser serves as a hygienic barrier between the reusable heating element and the consumable aerosol-forming substrate. This intermediary layer prevents direct contact and potential contamination while maintaining efficient heat transfer, allowing the heating element to be reused without direct exposure to substrate materials.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The heating system is segmented into separate components: the reusable heating element, the disposable heat diffuser, and the consumable substrate. This segmentation allows the heating element to be isolated from contamination sources while maintaining thermal coupling through the heat diffuser.

Inventive Principle:

Principle #1Segmentation

3Manufacturing precision

If frangible capsule is inserted into lumen of retention medium, then assembly precision is improved, but device complexity increases

Engineering Contradiction:

Improvecapsule insertion precisionVSAvoidarticle structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Instead of inserting the retention medium around the capsule, the capsule is inserted into the pre-formed lumen of the retention medium. This inverted approach simplifies the assembly process and improves precision by providing a defined insertion path through the lumen, while the modular nature of the components keeps overall complexity manageable.

Inventive Principle:

Principle #13The other way round (Inversion)

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 achieves more uniform heating of aerosol-forming substrates, preventing hot spots and maintaining consistent aerosol characteristics, while also addressing hygiene issues by using a removable heat diffuser that can be reused or replaced.

Implementation Method 1

a heat diffuser comprising a porous body that absorbs heat from an electric heating element, allowing air to be heated indirectly and evenly

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

The system achieves more uniform heating of aerosol-forming substrates, preventing hot spots and maintaining consistent aerosol characteristics

Methodology Applied

Scientific EffectHeat distribution: Conduction (thermal)

Data Source

PatentUS20260041151A1Aerosol-generating article with frangible capsule selectively insertable into lumen of retention medium

Publication Date: 2026.02.12 ALTRIA CLIENT SERVICES LLC

AI summary

The aerosol-generating article includes a retention medium defining a lumen, a side surface of a first end of the retention medium defining an opening of the lumen, and at least one frangible capsule selectively insertable into the lumen through the opening, the at least one frangible capsule releasably containing a substrate, the retention medium being configured to absorb and retain the substrate after a release of the substrate once the at least one frangible capsule is ruptured by an external force, the retention medium being devoid of the substrate prior to the release of the substrate from the at least one frangible capsule.