Cooling Filter with Alkaline Chloride Coating for Smoke Temperature Reduction

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Solution Overview

Problem

Heating type stick articles generate excessive water vapor and high temperatures during use, leading to an inhaling experience that lacks cooling, which affects the economy and functionality of the device.

Innovation Solution

A cooling filter with a coating layer containing alkaline metal chloride, such as sodium chloride, is integrated into the smoking article, providing an endothermic reaction to lower airflow temperature and improve the smoking experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If high-temperature heating is applied to generate smoke flavor, then smoke flavor expression is improved, but temperature of airflow becomes too high causing discomfort to smoker

Engineering Contradiction:

Improvetemperature of airflowVSAvoidhot heat inhalation discomfort

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The patent utilizes phase transition of water (evaporation) in the cooling filter to reduce airflow temperature. The water absorbs heat from the hot airflow and evaporates, transitioning from liquid to vapor phase, thereby cooling the airflow that reaches the smoker.

Inventive Principle:

Principle #36Phase transitions

Solution Approach 2:

The cooling filter acts as an intermediary component between the heating element and the user. It introduces water as a mediating substance that absorbs excess heat from the airflow, preventing direct contact with high-temperature smoke and reducing thermal discomfort.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If cooling material is added downstream of medium portion, then cooling effect is improved, but device complexity increases

Engineering Contradiction:

Improvecooling effectVSAvoiddevice structure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent combines the cooling function with the existing filter structure by integrating a cooling filter containing water into the downstream portion of the heating device. This merges the filtration and cooling functions into a single component, avoiding the need for separate cooling mechanisms and reducing overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

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 cooling filter effectively reduces the temperature of mainstream smoke, enhancing the tobacco taste and providing a long-lasting smoke flavor while being environmentally friendly due to easy decomposition.

Implementation Method 1

Methodology Applied

Scientific EffectEndothermic reaction: Endothermic Reaction

Implementation Method 2

the cooling filter coated with a material having endothermic and hygroscopic properties

Methodology Applied

Scientific EffectHygroscopic properties: Absorption (physical)

Data Source

PatentUS20240365854A1Cooling filter and smoking article including the same

Publication Date: 2024.11.07 KT&G CO LTD

AI summary

The disclosure relates to a cooling filter and a smoking article including the same, and more particularly, to a cooling filter having a tubular shape with a hollow formed inside, and a main body portion, in which a coating layer is formed on a surface of the hollow, and the coating layer includes alkaline metal chloride, and a smoking article including the same. By using the filter, a smoking article with an effective cooling function and improved tobacco taste and long-lasting smoke flavor may be provided.