Aerosol Heater Assembly Layout for Robust Wick Coupling

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Solution Overview

Problem

Heat transfer from the heating element to other components of the aerosol-generating device, cartridge, or system causes damage and discomfort during use, and the coupling of the heating element to the wicking material can be detrimental if not robust.

Innovation Solution

A heater assembly with a heating element comprising multiple heating portions and attachment portions, fixed to a frame via a support structure, which minimizes heat transfer and ensures robust coupling with the wicking material.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the heating element is secured to other components of the heater assembly to provide stability, then the stability and reliability of the heating element is improved, but heat transfer from the heating element to other components increases causing damage and discomfort

Engineering Contradiction:

Improvestability of heating elementVSAvoidheat transfer to components

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a frame as an intermediary component between the heating element and other components of the heater assembly. The frame provides structural support and stability to the heating element while physically separating it from other components, thereby preventing direct heat transfer. This mediator approach allows the heating element to be securely mounted without causing thermal damage to surrounding parts.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the wicking material is coupled to the heating element to ensure reliable physical contact, then the reliability of aerosol generation is improved, but the heating element may be damaged by the coupling force

Engineering Contradiction:

Improvereliability of aerosol generationVSAvoidrobustness of heating element

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The heating element is divided into distinct functional portions: heating portions that generate heat and attachment portions that provide mechanical coupling. The attachment portions are specifically designed to be more robust and better suited for mechanical coupling with the wicking material, while the heating portions focus on thermal function. This segmentation allows the heating element to withstand coupling forces without compromising the integrity of the heating zones.

Inventive Principle:

Principle #1Segmentation

3Strength

If the heating element is made more robust to withstand coupling forces, then the strength and durability of the heating element is improved, but the heat transfer to other components may increase

Engineering Contradiction:

Improverobustness of heating elementVSAvoidheat transfer to components

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The heating element exhibits local quality variations through its segmented structure. The attachment portions have different mechanical properties optimized for strength and coupling, while the heating portions have thermal properties optimized for heat generation. This localized differentiation allows the heating element to be robust where needed without unnecessarily increasing thermal mass or heat transfer in the heating zones.

Inventive Principle:

Principle #3Local quality

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 design provides a more robust and efficient aerosol generation process by reducing heat transfer to other components and ensuring secure coupling, while allowing easy aerosol transport to the user.

Implementation Method 1

the heating element is configured to vaporise the liquid aerosol-forming substrate. For example, the heating element may be restively heated.

Methodology Applied

Scientific EffectResistive heating: Joule Heating

Implementation Method 2

The wicking material is configured to transport liquid aerosol-forming substrate to the heating element.

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 3

An airflow is provided past the heating element to entrain the generated vapour. In the airflow the vapour is condensed and an aerosol is formed.

Methodology Applied

Scientific EffectCondensation: Condensation

Data Source

PatentUS20260013559A1Heater assembly with improved robustness for an aerosol-generating device

Publication Date: 2026.01.15 PHILIP MORRIS PRODUCTS SA

AI summary

A heater assembly for an aerosol-generating device is provided, including: a heating element including heating portions and an attachment portion; a support structure including an aperture and an upper support structure surface parallel to a first plane; a frame partially surrounding the support structure; first and second electrical contacts in electrical contact with first and second ends of the heating element, respectively, the heating element providing a continuous electrical path between the first electrical contact and the second electrical contact and being fixed to the frame, each heating portion being within or overlying the aperture and separated from the frame by an attachment portion including first and second sections, each first section being substantially parallel with the first plane, and each second section extending from the upper support structure surface towards a second plane, the second plane being parallel but not coplanar with the upper support structure surface.