Induction-Heated Flavor Inhaler Structure for EMI and Heat Loss Control

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Solution Overview

Problem

Existing flavor inhalers lack a novel structure that efficiently heats flavor sources while minimizing electromagnetic interference and heat loss, and maintaining consistent aerosol generation.

Innovation Solution

A flavor inhaler design that inductively heats the bottom wall of a container containing a slurry of liquid and solid flavor sources, using an induction coil positioned to face the bottom wall, with an electromagnetic shield and insulating material to minimize interference and loss, and a porous structure to control aerosol flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If induction heating is used to heat the flavor source, then heating efficiency is improved, but electromagnetic interference increases

Engineering Contradiction:
Improveheating efficiencyVSAvoidelectromagnetic interference
Core Design Contradiction:
Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

An electromagnetic shield is introduced as an intermediary component between the induction coil and the external environment. The shield absorbs and blocks electromagnetic interference while allowing the induction heating function to proceed efficiently, thus resolving the contradiction between heating efficiency and electromagnetic interference

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The electromagnetic shield converts the harmful electromagnetic interference into a beneficial function by using the shield material's electromagnetic properties to absorb and dissipate the interference energy, transforming a harmful effect into a protective mechanism

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

2Use of energy by moving object

If induction coil is positioned close to the container bottom wall, then heating efficiency is improved, but heat loss increases

Engineering Contradiction:
Improveheating efficiencyVSAvoidheat loss
Core Design Contradiction:
Use of energy by moving objectVSLoss of energy

Solution Approach 1:

An insulating layer is introduced as an intermediary between the induction coil and the container bottom wall. This insulating layer prevents direct thermal contact that would cause heat loss, while still allowing the induction heating to be transmitted effectively to the flavor source, thus resolving the contradiction between heating efficiency and heat loss

Inventive Principle:
Principle #24Intermediary (Mediator)

3Device complexity

If the container structure is simplified, then device complexity is reduced, but aerosol generation consistency deteriorates

Engineering Contradiction:
Improvedevice complexityVSAvoidaerosol generation consistency
Core Design Contradiction:
Device complexityVSStability of the object's composition

Solution Approach 1:

A porous structure is incorporated into the container bottom wall or aerosol generation component. The porous structure provides consistent aerosol generation by controlling the distribution and flow of the flavor source material, while maintaining a relatively simple overall device structure, thus resolving the contradiction between device complexity and aerosol generation consistency

Inventive Principle:
Principle #31Porous materials

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 achieves efficient heating with reduced electromagnetic interference, minimal heat loss, and consistent aerosol production, maintaining flavor quality and preventing leakage.

Implementation Method 1

an induction coil that is arranged to face the bottom wall of the container accommodated in the housing, and configured to inductively heat the bottom wall of the container

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

configured to inductively heat the bottom wall of the container

Methodology Applied
Scientific EffectInduction heating: Induction Heating

Data Source

PatentEP3918931B1Flavor inhaler
Publication Date: 2026.04.08 JAPAN TOBACCO INC
  • EP3918931B1 patent drawingFigure 1
  • EP3918931B1 patent drawingFigure 2~3
  • EP3918931B1 patent drawingFigure 4~6

AI summary

Provided is a flavor inhaler having a novel structure. The flavor inhaler is configured to heat at least a flavor source accommodated in a container with a bottom wall and a side wall. The flavor inhaler includes a housing that accommodates the container, and an induction coil that is arranged to face the bottom wall of the container accommodated in the housing and configured to inductively heat the bottom wall of the container.