Flavor Inhaler Airflow Layout for Easy Cleaning and Dropout Prevention

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Solution Overview

Problem

Existing flavor inhalers face challenges in accommodating novel consumable materials and maintaining air flow paths suitable for these configurations, with issues in cleaning and preventing consumable material dropouts.

Innovation Solution

A flavor inhaler design featuring a cover portion that opens/closes along a longitudinal direction, with a first opening allowing external air inflow, and a recessed air communication path that prevents finger obstruction and condensation, while enabling easy maintenance and temperature control of the air flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a novel consumable material configuration is introduced, then the flavor inhaler can accommodate new material formats, but the cover portion and air flow path need to be rearranged to suit the new configuration

Engineering Contradiction:
Improveconsumable material configuration adaptabilityVSAvoidcover portion and air flow path arrangement
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The cover portion is designed to perform multiple functions: it serves as both a closure for the accommodating portion and as a structural element that defines the air flow path. By making the cover portion multi-functional, the design can accommodate novel consumable material configurations without requiring separate redesign of the cover and air flow path, thus resolving the contradiction between adaptability and device complexity

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

2Ease of repair

If the cover portion is designed to open/close along the longitudinal direction, then easy maintenance is enabled, but the air flow path arrangement becomes more complex

Engineering Contradiction:
Improvemaintainability of accommodating portionVSAvoidair flow path arrangement
Core Design Contradiction:
Ease of repairVSDevice complexity

Solution Approach 1:

The accommodating portion is segmented into a cover portion and a body portion, with the cover portion capable of opening and closing along the longitudinal direction. This segmentation allows easy access to the interior of the accommodating portion for maintenance purposes. The air flow path is arranged to pass through the consumable material from the proximal end to the distal end, which can be cleaned by inserting a straight cotton swab or brush through the open cover portion

Inventive Principle:
Principle #1Segmentation

3Ease of operation

If the first opening portion is provided facing the cover portion, then external air can flow in easily, but the opening may be obstructed by user's finger

Engineering Contradiction:
Improveexternal air inflowVSAvoidair flow path obstruction prevention
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The first opening portion is provided on the rear face of the accommodating portion, which is a different spatial dimension relative to the user's hand grip. This dimensional arrangement allows external air to flow in easily while preventing finger obstruction, as the opening is positioned in a location that is not easily accessible to the user's fingers during normal operation

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

4Object-affected harmful factors

If the opening portion is positioned close to the distal end, then condensation can be prevented, but the air flow path becomes more complex

Engineering Contradiction:
Improvecondensation preventionVSAvoidair flow path configuration
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The air flow path is configured to pass through the consumable material from the proximal end to the distal end, with the first opening portion positioned on the rear face near the distal end. This preliminary arrangement of the air flow path ensures that external air enters close to the distal end, which prevents condensation from forming in the air flow path before reaching the user's mouth

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 design facilitates easy maintenance, prevents consumable material dropouts, and ensures a suitable air flow path for flavor inhalation, with temperature-controlled air delivery, enhancing user experience and device functionality.

Implementation Method 1

a heating unit for heating the accommodated consumable material

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 2

a first opening portion which is formed facing the cover portion and is configured to allow an inflow of external air

Methodology Applied
Scientific EffectAir flow: Convection

Data Source

PatentEP4714275A1Flavor inhaler, consumable material, and flavor inhalation system
Publication Date: 2026.03.25 JAPAN TOBACCO INC
  • EP4714275A1 patent drawingFigure 1
  • EP4714275A1 patent drawingFigure 2A
  • EP4714275A1 patent drawingFigure 2B

AI summary

Provided is a flavor inhaler comprising an accommodating portion accommodating a consumable material, wherein the accommodating portion comprises: a proximal end in proximity to the mouth of an inhaling user; a distal end positioned on the opposite side to the proximal end; a heating unit for heating the accommodated consumable material; a cover portion configured to be capable of opening/closing a portion of the accommodating portion along a longitudinal direction; and a first opening portion which is formed facing the cover portion and is configured to allow an inflow of external air.