Inhalation Device Heating Control for Easier Housing Cleaning

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Solution Overview

Problem

Inhalation devices face challenges in convenience of cleaning due to soiling of the housing unit from aerosol spills and adherence of liquid or generated aerosol, necessitating improved cleaning methods.

Innovation Solution

The inhalation device includes a control unit that operates the heating unit when the base material is housed and after completion of heating, allowing for controlled cleaning by timing the heating unit's operation based on the presence or removal of the base material.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the heating unit operates continuously to prevent soiling, then cleaning convenience is improved, but energy consumption increases

Engineering Contradiction:
Improvecleaning convenienceVSAvoidenergy consumption
Core Design Contradiction:
Ease of operationVSUse of energy by moving object

Solution Approach 1:

The heating unit performs preliminary heating action after base material removal to prevent soiling before it occurs. The control unit detects when the base material is removed and immediately activates the heating unit to heat the housing unit, evaporating any liquid or aerosol that may have accumulated, thus maintaining cleanliness proactively rather than reactively.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system changes the operational parameters of the heating unit based on the presence or absence of base material. When base material is detected as removed, the control unit activates the heating unit with specific heating conditions; when base material is present, the heating unit remains inactive. This parameter change optimizes both cleaning effectiveness and energy efficiency.

Inventive Principle:
Principle #35Parameter changes

2Ease of operation

If the heating unit operates after base material removal to clean the housing unit, then cleaning effectiveness is improved, but device complexity increases

Engineering Contradiction:
Improvecleaning effectivenessVSAvoidcontrol complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The control unit continuously monitors the presence of base material in the housing unit and uses this feedback to determine when to activate the heating unit for cleaning. This feedback mechanism ensures the heating unit operates only when necessary (after base material removal), achieving effective cleaning without requiring complex additional cleaning systems.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The heating unit serves multiple functions: it heats the base material during normal operation and cleans the housing unit after base material removal. This multi-functionality eliminates the need for separate cleaning mechanisms, reducing device complexity while maintaining cleaning effectiveness.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 enhances the convenience of cleaning the inhalation device by optimizing the heating unit's operation to minimize soiling and facilitate easier maintenance.

Implementation Method 1

the control unit operates the heating unit in response to the base material being removed from the housing unit after completion of an operation of heating the base material

Methodology Applied
Scientific EffectEvaporation: Evaporation

Implementation Method 2

a heating unit that heats the housing unit

Methodology Applied
Scientific EffectHeating: Heating

Data Source

PatentEP4635341A1Inhalation device, control method, and program
Publication Date: 2025.10.22 JAPAN TOBACCO INC
  • EP4635341A1 patent drawingFigure 1
  • EP4635341A1 patent drawingFigure 2
  • EP4635341A1 patent drawingFigure 3

AI summary

An MCU (1) of an inhalation device (100): operates a heating unit (121C) when a stick-type base material (150) is housed in a housing unit (140C); and operates the heating unit (121C) in response to removal of the stick-type base material (150) from the housing unit (140C) after operation of heating the stick-type base material (150) is finished.