Heating Plate Support Structure for Low-Heat-Loss Aerosol Heating

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Solution Overview

Problem

Aerosol generating devices suffer from thermal inefficiency due to heat dissipation through supporting structures, leading to frequent battery recharging or replacement, and the need for improved energy management.

Innovation Solution

The device incorporates a supporting structure with inclined retention sides in recess portions to minimize heat transfer, using ceramic heating plates and insulation bodies to enhance thermal efficiency and maintain accurate positioning of the heating plates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a supporting structure is used to position the heating plate, then positioning accuracy and structural stability are improved, but heat dissipation increases and energy efficiency deteriorates

Engineering Contradiction:
Improvepositioning accuracyVSAvoidheat dissipation
Core Design Contradiction:
Measurement precisionVSLoss of energy

Solution Approach 1:

The patent introduces an intermediary insulating body positioned between the heating plate and the supporting structure. This insulating body acts as a thermal mediator that mechanically transmits the heating plate's weight to the support while blocking thermal conduction paths, thereby maintaining positioning accuracy without sacrificing energy efficiency.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent extracts the thermal conduction function from the supporting structure by introducing a separate insulating component. The supporting structure retains only its mechanical support and positioning functions, while the insulating body assumes the thermal isolation function, preventing heat dissipation to the support structure.

Inventive Principle:
Principle #2Taking out (Extraction)

2Stability of the object's composition

If the supporting structure contacts the heating plate directly, then structural stability is improved, but thermal efficiency deteriorates due to heat transfer

Engineering Contradiction:
Improvestructural stabilityVSAvoidthermal efficiency
Core Design Contradiction:
Stability of the object's compositionVSUse of energy by moving object

Solution Approach 1:

The insulating body serves as a thermal intermediary that decouples the thermal and mechanical functions. It provides sufficient mechanical support for structural stability while its low thermal conductivity properties prevent heat transfer, thereby maintaining both stability and thermal efficiency.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The supporting system becomes a composite structure combining the heating plate, insulating body, and supporting structure. This composite arrangement leverages the high thermal conductivity of the heating plate for efficient heat transfer to the substrate while using the low thermal conductivity of the insulating body to prevent parasitic heat loss to the support structure.

Inventive Principle:
Principle #40Composite materials

3Loss of energy

If insulation measures are added to reduce heat loss, then energy efficiency is improved, but device complexity increases

Engineering Contradiction:
Improveheat lossVSAvoidstructure complexity
Core Design Contradiction:
Loss of energyVSDevice complexity

Solution Approach 1:

The insulating body is designed as a simple intermediary component that integrates seamlessly into the existing supporting structure. Its straightforward geometry and placement minimize design complexity while effectively reducing heat loss, avoiding the need for complex insulation systems.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

Instead of insulating the entire device, the patent applies insulation locally only at the critical heat loss path between the heating plate and the supporting structure. This targeted approach reduces heat loss effectively while minimizing the addition of components and overall device complexity.

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 reduces heat loss, increases energy efficiency, and extends battery life by maintaining heat within the heating chamber, ensuring stable and efficient aerosol generation.

Implementation Method 1

heat the substrate by conduction, convection and/or radiation, to generate aerosol for inhalation

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

heat transfer occurs between the heating plate and the aerosol substrate, but also with other internal components of the aerosol generating device as for example means supporting the heating plate. Hence, heat is dissipated in the aerosol generating device through said supporting means

Methodology Applied
Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentEP4422431B1Aerosol generating device comprising a supporting structure receiving heating plates
Publication Date: 2026.02.11 JT INTERNATIONAL SA
  • EP4422431B1 patent drawingFigure 1
  • EP4422431B1 patent drawingFigure 2
  • EP4422431B1 patent drawingFigure 3

AI summary

The present invention concerns an aerosol generating device (10) configured to operate with a flat-shaped tobacco article comprising a substrate portion, the device (10) comprising: - a heating chamber (46) extending according to a chamber axis and configured to receive the substrate portion of the tobacco article, the heating chamber (46) comprising a heating plate (47A; 47B) defining two opposite edges (49) extending according to the chamber axis; - a supporting structure (50) extending along the chamber axis and comprising two recess portions (51) facing one another, each recess portion being adapted to receive at least a part of one of said edges of the heating plate and delimited by two opposite retention sides designed to retain the corresponding edge; at least one retention side of each recess portion being inclined in respect with a transversal axis parallel to the heating plate and perpendicular to the chamber axis.