Flat-Shaped Heating Chamber With Staged Preheating

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Solution Overview

Problem

Existing aerosol generating devices consume high electrical energy during heating, leading to design constraints and reduced user comfort due to frequent battery recharging.

Innovation Solution

A heating method for a flat-shaped heating chamber with two opposing heating elements, where one element is powered during pre-heating to a target temperature, and both elements are powered in alternating heating profiles with defined intervals to reduce energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If both heating elements are powered simultaneously during pre-heating, then heating speed is improved, but electrical energy consumption increases

Engineering Contradiction:

Improveheating speedVSAvoidelectrical energy consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The pre-heating process is segmented into two stages: first heating one heating element to target temperature, then heating the second heating element. This segmentation reduces simultaneous power demand and total energy consumption while maintaining acceptable heating speed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

One heating element is heated to target temperature before the second heating element is activated. This preliminary action allows the first element to reach operational temperature with lower power demand, then the second element is heated subsequently, reducing peak power consumption and total energy usage.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If both heating elements are powered continuously during vaping phase, then aerosol production consistency is improved, but electrical energy consumption increases

Engineering Contradiction:

Improveaerosol production consistencyVSAvoidelectrical energy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

During the vaping phase, heating elements are powered in periodic intervals rather than continuously. The controller activates heating elements alternately or in cycles, maintaining sufficient temperature for consistent aerosol production while significantly reducing total energy consumption compared to continuous operation.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The heating control is made dynamic by adjusting the timing and duration of heating element activation during vaping. The controller modulates power delivery based on real-time temperature feedback and vaping demands, optimizing the balance between aerosol production consistency and energy efficiency.

Inventive Principle:

Principle #15Dynamics

3Speed

If high power is applied to heating elements, then heating speed is improved, but battery capacity requirements increase

Engineering Contradiction:

Improveheating speedVSAvoidbattery capacity

Core Design Contradiction:

SpeedVSQuantity of substance

Solution Approach 1:

The heating process is divided into sequential operations where one heating element is activated before the other. This segmentation reduces the peak power demand on the battery, allowing smaller battery capacity to meet the heating requirements without excessive energy consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

By heating one heating element to target temperature before activating the second element, the system reduces simultaneous power demands. This preliminary heating action allows the battery to deliver power in smaller, more manageable increments, reducing the required battery capacity.

Inventive Principle:

Principle #10Preliminary action

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 method reduces electrical energy consumption by approximately 17% overall, allowing faster pre-heating and consistent aerosol production with improved user comfort and efficient heat transfer.

Implementation Method 1

heating an aerosol substrate, but not combusting or burning it, releases aerosol that comprises the components sought by the user but not the toxic and carcinogenic by-products of combustion and burning

Methodology Applied

Scientific EffectConduction (thermal): Conduction (thermal)

Implementation Method 2

heating an aerosol substrate, but not combusting or burning it, releases aerosol

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 3

heating an aerosol substrate, but not combusting or burning it

Methodology Applied

Scientific EffectRadiation: Thermal Radiation

Implementation Method 4

heater which consumes a lot of energy to bring the heater up to a predefined temperature

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS20250288003A1Heating Method for a Flat-Shaped Heating Chamber of an Aerosol Generating Device and Associated Aerosol Generating Device

Publication Date: 2025.09.18 JT INTERNATIONAL SA

AI summary

A heating method is provided for a flat-shaped heating chamber of an aerosol generating device configured to operate with a flat-shaped tobacco article including a substrate part, the substrate part defining two opposite heating surfaces, the heating chamber including two heating elements arranged to face each other, each heating element being designed to extend along substantially the whole area of the respective heating surface. The method includes carrying out a pre-heating phase including powering only one heating element until achieving a target temperature; and carrying out a vaping phase by powering each heating element according to different heating profiles, at least one heating profile including powering of the corresponding heating element within predetermined heating intervals according to a predefined powering value.