Aerosol Heater Voltage Timing for Precise Temperature Control

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Solution Overview

Problem

Existing aerosol generation systems lack precise control over the temperature at which the aerosol source is heated, affecting the flavor experience.

Innovation Solution

An aerosol generation system with a control unit that measures a parameter of the heating unit and applies voltage based on that measurement, varying the duration of the voltage application to achieve optimal temperature control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a constant voltage is repeatedly applied to the heater to detect resistance value and control temperature, then the temperature control capability is improved, but the response speed and precision are insufficient

Engineering Contradiction:
Improveheater temperature controlVSAvoidtemperature response speed
Core Design Contradiction:
TemperatureVSSpeed

Solution Approach 1:

The patent applies periodic action by repeatedly applying constant voltage to the heater in cycles, measuring resistance values during each cycle, and using this periodic measurement to track temperature changes over time. This enables the control unit to detect temperature trends and adjust heating accordingly, improving both response speed and precision through continuous periodic monitoring rather than single-point measurement.

Inventive Principle:
Principle #19Periodic action

2Temperature

If the heating duration is extended to ensure adequate heating, then the temperature stability is improved, but the aerosol source consumption increases

Engineering Contradiction:
Improveheating temperature stabilityVSAvoidaerosol source consumption
Core Design Contradiction:
TemperatureVSLoss of substance

Solution Approach 1:

The patent implements feedback by measuring the resistance value of the heater during voltage application and using this measurement to determine the actual temperature state. The control unit compares the measured resistance with target values and adjusts the heating duration and voltage application accordingly. This feedback mechanism allows the system to achieve adequate heating temperature stability while minimizing unnecessary heating time, thereby reducing aerosol source consumption.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent applies parameter changes by dynamically adjusting the voltage application duration and intensity based on real-time resistance measurements. The control unit modifies heating parameters (voltage duration, power level) according to the measured temperature state, enabling the system to reach target temperature efficiently without excessive heating time, thus balancing temperature stability with aerosol source conservation.

Inventive Principle:
Principle #35Parameter changes

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 system enables more appropriate control of the heating temperature, optimizing flavor delivery and reducing aerosol source consumption.

Implementation Method 1

a heating unit for heating an aerosol source

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 2

repeatedly applying a constant voltage to a heater to detect a resistance value of the heater

Methodology Applied
Scientific EffectElectrical resistance temperature dependence: Electrical Resistance

Data Source

PatentEP4602961A1Aerosol generation system, control method, and program
Publication Date: 2025.08.20 JAPAN TOBACCO INC
  • EP4602961A1 patent drawingFigure 1
  • EP4602961A1 patent drawingFigure 2
  • EP4602961A1 patent drawingFigure 3

AI summary

[Problem] To provide a system which enables more appropriate control of a temperature at which an aerosol source is heated. [Solution] An aerosol generation system comprising: a heating unit for heating an aerosol source; and a control unit for controlling the operation of the heating unit based on a parameter corresponding to the temperature of the heating unit, wherein the control unit controls the operation of the heating unit by repeating, in the stated order, a first step for measuring the parameter of the heating unit, and a second step for applying a voltage to the heating unit in a manner determined based on the parameter measured in the first step, and variably controls the duration of the second step.