Flavor-Generating Article With Low-Permittivity Microwave Filtration

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Solution Overview

Problem

Existing flavor-generating articles face inefficiencies in heating the flavor source using microwaves due to microwave absorption by filters and components, leading to incomplete flavor generation and potential adherence of heated components to the microwave generating antenna.

Innovation Solution

The flavor-generating article incorporates filters with a relative permittivity of 10 or less, such as mouthpiece and dropping-prevention filters, to minimize microwave absorption, along with features like longitudinally-extending holes and air flow paths to enhance flavor delivery and heating efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a filter is used in the flavor-generating article, then flavor delivery and component filtration are improved, but microwave absorption increases causing heating efficiency to deteriorate

Engineering Contradiction:
Improveflavor deliveryVSAvoidmicrowave absorption
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The patent changes the dielectric constant parameter of the filter material to 10 or less, which fundamentally alters the microwave absorption characteristics. This parameter change allows the filter to maintain its flavor delivery function while dramatically reducing microwave absorption, thereby resolving the contradiction between filtration reliability and energy loss.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If conventional filters are used, then filtration function is provided, but microwave generating antenna insertion becomes difficult due to adherence

Engineering Contradiction:
Improvefiltration functionVSAvoidantenna insertion
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

By changing the dielectric constant parameter of the filter material to 10 or less, the patent reduces the electromagnetic interaction between the filter and the microwave generating antenna. This parameter change prevents adherence during insertion while maintaining the filtration function, thus resolving the contradiction between reliability and ease of operation.

Inventive Principle:
Principle #35Parameter changes

3Reliability

If filters with high dielectric constant are used, then filtration is effective, but microwave transmission to flavor source is blocked

Engineering Contradiction:
Improvefiltration effectivenessVSAvoidmicrowave transmission
Core Design Contradiction:
ReliabilityVSPower

Solution Approach 1:

The patent changes the dielectric constant parameter from conventional high values to 10 or less, which fundamentally alters the microwave transmission characteristics. This parameter change allows microwaves to pass through the filter with minimal attenuation while maintaining filtration effectiveness, thereby resolving the contradiction between filtration reliability and power transmission.

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

Efficient heating of the flavor source is achieved, reducing microwave absorption and adherence issues, while maintaining comfortable air flow resistance and effective flavor delivery to the user.

Implementation Method 1

a flavor source and a filter having a relative permittivity of 10 or less... the flavor source is heated by irradiating the flavor source with microwaves

Methodology Applied
Scientific EffectMicrowave heating: Dielectric Heating

Implementation Method 2

suppress absorption of the microwaves from the microwave generating antenna by the filter

Methodology Applied
Scientific EffectMicrowave absorption: Absorption (EM radiation)

Data Source

PatentEP4616728A1Flavor-generating article
Publication Date: 2025.09.17 JAPAN TOBACCO INC
  • EP4616728A1 patent drawingFigure 1
  • EP4616728A1 patent drawingFigure 2
  • EP4616728A1 patent drawingFigure 3

AI summary

Provided is a flavor-generating article that is heated by microwaves to generate a flavor. The flavor-generating article has a flavor source and a filter having a relative permittivity of 10 or less.