Frangible-Capsule Aerosol Article With Liquid Retention Medium

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Solution Overview

Problem

Existing heated aerosol-generating systems face issues such as overheating of liquid substrates, inconsistent aerosol production, and hygiene concerns, particularly in e-cigarette systems, and difficulty in evenly heating aerosol-forming substrates in electrically operated systems.

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 drawn through and heated indirectly, providing more even heating of the aerosol-forming substrate, and reducing overheating risks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If direct heating of liquid substrate is used, then heating efficiency is improved, but overheating occurs

Engineering Contradiction:

Improveheating efficiencyVSAvoidoverheating

Core Design Contradiction:

Use of energy by moving objectVSTemperature

Solution Approach 1:

The patent introduces a porous heating element as an intermediary between the heat source and the liquid aerosol-forming substrate. The porous structure absorbs and distributes heat evenly throughout the liquid substrate, preventing localized overheating while maintaining efficient heating. The porous material acts as a heat mediator that transforms direct concentrated heating into distributed gentle heating.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The heating element is designed with a porous structure that allows uniform heat distribution throughout the liquid substrate. The porous material provides large surface area for heat transfer while preventing hot spots, enabling efficient heating without overheating the aerosol-forming liquid.

Inventive Principle:

Principle #31Porous materials

2Speed

If concentrated heating is applied, then heating speed is improved, but heating uniformity deteriorates

Engineering Contradiction:

Improveheating speedVSAvoidheating uniformity

Core Design Contradiction:

SpeedVSStability of the object's composition

Solution Approach 1:

The porous heating element provides distributed heating throughout the liquid substrate while maintaining fast heating rates. The porous structure enables simultaneous heat transfer to multiple locations, achieving both speed and uniformity by heating throughout the entire volume rather than at a single point.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The heating system applies different heating intensities to different regions of the liquid substrate simultaneously through the porous structure. Each local region receives appropriate heat distribution, ensuring uniform heating across the entire substrate while maintaining overall heating speed.

Inventive Principle:

Principle #3Local quality

3Use of energy by moving object

If liquid substrate is directly exposed to heat source, then heat transfer efficiency is improved, but aerosol consistency deteriorates

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidaerosol consistency

Core Design Contradiction:

Use of energy by moving objectVSManufacturing precision

Solution Approach 1:

The porous heating element serves as an intermediary that enables efficient heat transfer to the liquid substrate while preventing direct exposure to concentrated heat sources. This intermediate heating approach produces more consistent aerosol generation by avoiding localized overheating that would cause variability in aerosol properties.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The porous heating structure provides efficient heat transfer to the liquid aerosol-forming substrate while ensuring uniform heating throughout. This results in consistent aerosol production by maintaining stable temperature distribution, preventing the formation of aerosol with variable characteristics.

Inventive Principle:

Principle #31Porous materials

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 consistent aerosol production and reduces overheating by using a heat diffuser with a porous body to absorb and distribute heat evenly, improving user experience and hygiene.

Implementation Method 1

a heat diffuser comprising a porous body that absorbs heat from an electric heating element

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

allowing air to be drawn through and heated indirectly

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS12402653B2Aerosol-generating article with liquid aerosol-forming substrate, an aerosol-generating system, and a method of using an aerosol-generating article

Publication Date: 2025.09.02 ALTRIA CLIENT SERVICES LLC

AI summary

The aerosol-generating article is has an outlet end, a distal end upstream from the outlet end, and a mid-point located an equal distance between the outlet end and the distal end. The article includes a liquid aerosol-forming substrate contained within a frangible capsule, the frangible capsule being located between the distal end and the mid-point. At least a portion of a liquid retention medium is located between the distal end and the mid-point. The article is configured such that, during use, air is capable of being drawn through the article from the distal end to the outlet end.