Cigarette Cooling Segment with Porous Fiber Channels

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Solution Overview

Problem

Traditional cigarettes face challenges in achieving optimal aerosol filtration and cooling, as high filtering performance can reduce aerosol migration, while low filtering performance fails to properly filter aerosol components.

Innovation Solution

A cigarette design featuring a tobacco rod, a supporting segment, a cooling segment with porosity of 50% or less, and a mouthpiece, where the cooling segment includes a bundle of straight or crimped fibers arranged along the longitudinal direction to form air channels, enhancing cooling efficiency and filtering performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If filtering performance of a filter is increased, then aerosol components are properly filtered, but aerosol migration is reduced

Engineering Contradiction:

Improvefiltering performanceVSAvoidaerosol migration

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The filter rod is divided into multiple segments (first filter segment, second filter segment, cooling segment) with different functions. The first and second filter segments provide filtration, while the cooling segment with porosity of 50% or less provides cooling and controlled aerosol passage, resolving the contradiction between filtration and migration

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different segments of the filter rod have different porosity values tailored to their specific functions. The cooling segment has porosity of 50% or less for effective cooling, while other segments have different porosity to balance filtration and aerosol flow, allowing each part to optimize its local function

Inventive Principle:

Principle #3Local quality

2Productivity

If porosity of cooling segment is increased, then aerosol flow is improved, but cooling efficiency is reduced

Engineering Contradiction:

Improveaerosol flowVSAvoidcooling efficiency

Core Design Contradiction:

ProductivityVSTemperature

Solution Approach 1:

The porosity of the cooling segment is specifically controlled at 50% or less to optimize the balance between aerosol flow and cooling efficiency. This parameter change ensures sufficient cooling contact while maintaining adequate aerosol passage

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

The design improves cooling efficiency and maintains appropriate draw resistance, ensuring effective aerosol filtration and delivery to the user while preventing burning and leakage.

Implementation Method 1

a cooling segment positioned at a downstream end of the supporting segment... the cooling segment having porosity of 50% or less

Methodology Applied

Scientific EffectHeat exchange: Heat Exchanger

Implementation Method 2

a filter which serves to filter specific components contained in an aerosol or to cool the aerosol

Methodology Applied

Scientific EffectPhysical filtration: Filter (physical)

Data Source

PatentUS12167745B2Cigarette

Publication Date: 2024.12.17 KT&G CO LTD

AI summary

Disclosed is a cigarette including a tobacco rod, a supporting segment positioned at a downstream end of the tobacco rod, a cooling segment positioned at a downstream end of the supporting segment, and a mouthpiece positioned at a downstream end of the cooling segment.The cigarette according to the present embodiment may include a plurality of air channels formed along a longitudinal direction of the cigarette and the cooling segment having porosity of 50% or less.