Burning Type Heat Source Hollow Structure for Stable Flavor Inhalation

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Solution Overview

Problem

Conventional flavor inhalers face challenges in providing a stable heat amount throughout multiple puffs, particularly from the middle to the latter half, and insufficient heat in initial puffs due to variations in heat generation during puffing and natural burning.

Innovation Solution

A burning type heat source with a single longitudinal hollow and a lateral hollow communicating with it, positioned close to the ignition end, reduces air contact and promotes initial burning, ensuring stable heat from the middle to the latter half and sufficient heat in initial puffs by controlling air flow and heat distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a single longitudinal hollow is used to reduce air contact with burning area, then heat stability in middle to latter half puffs is improved, but heat amount in initial puffs becomes insufficient

Engineering Contradiction:
Improveheat stabilityVSAvoidheat amount
Core Design Contradiction:
Stability of the object's compositionVSUse of energy by moving object

Solution Approach 1:

The invention divides the hollow structure into two segments: a longitudinal hollow for stable heat delivery and a lateral hollow for initial heat enhancement. This segmentation allows each hollow to perform its specific function - the longitudinal hollow maintains stable burning in middle to latter half puffs while the lateral hollow provides sufficient heat in initial puffs by introducing additional air contact at the ignition end.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention applies local quality by positioning the lateral hollow specifically at the ignition end side relative to the burning position. This localized modification allows air to be introduced only where needed (at the ignition end) without increasing air contact across the entire burning surface, thereby providing initial heat enhancement while maintaining overall heat stability.

Inventive Principle:
Principle #3Local quality

2Use of energy by moving object

If lateral hollow is positioned close to ignition end (distance < 4 mm), then initial burning is promoted, but air flow resistance increases

Engineering Contradiction:
Improveinitial burningVSAvoidair flow resistance
Core Design Contradiction:
Use of energy by moving objectVSStress or pressure

Solution Approach 1:

The invention applies partial action by introducing air through the lateral hollow only at the ignition end side, rather than throughout the entire length of the burning type heat source. This localized air introduction provides sufficient initial burning promotion without creating excessive air flow resistance that would occur if air channels were distributed along the entire length.

Inventive Principle:
Principle #16Partial or excessive action

Solution Approach 2:

The invention adds a lateral dimension to the air flow path by incorporating a lateral hollow that extends in a direction crossing the longitudinal axis. This dimensional change allows air to enter the burning structure from the side rather than only from the end, providing initial burning enhancement while maintaining smooth overall air flow through the system.

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

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 configuration stabilizes heat delivery from the middle to the latter half of puffs and increases heat in initial puffs, while reducing pressure loss and allowing for smooth inhalation, enhancing user experience.

Implementation Method 1

a burning type heat source extending along a first direction from an ignition end toward a non-ignition end

Methodology Applied
Scientific EffectCombustion: Combustion

Implementation Method 2

a single longitudinal hollow extending along the first direction; and a lateral hollow extending along a second direction crossing the first direction, the lateral hollow communicating with the longitudinal hollow

Methodology Applied
Scientific EffectConvection: Convection

Data Source

PatentUS10524506B2Burning type heat source and flavor inhaler
Publication Date: 2020.01.07 JAPAN TOBACCO INC
  • US10524506B2 patent drawing
  • US10524506B2 patent drawing
  • US10524506B2 patent drawing

AI summary

A burning type heat source (50) includes: a single longitudinal hollow (51) extending along the first direction (D1); and a lateral hollow (52) extending along a second direction (D2) crossing the first direction (D1), the lateral hollow (52) communicating with the longitudinal hollow (51). The ignition end (50Ae) is provided at the ignition end (50Ae) side in the first direction relative to a burning position at an end of a second inhalation.