Heating Element Air Inlet Design for Volatilization Control

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Solution Overview

Problem

Existing smoking devices combust tobacco, leading to inefficient release of compounds and potential health issues, while 'heat not burn' products aim to address this by heating tobacco without burning it, but lack effective apparatus for volatilizing components without combustion.

Innovation Solution

The apparatus comprises a casing with a recess for a cartridge containing a heating element and smokable material, where air is admitted through a controlled inlet to heat the material without combustion, using a controller to regulate the heating element's power supply and ensure volatilization of components without burning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If tobacco is combusted to release compounds, then compounds are released, but health issues arise and release efficiency is poor

Engineering Contradiction:

Improvecompound release efficiencyVSAvoidhealth issues from combustion

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the temperature parameter from combustion range (>600°C) to heating range (200-400°C), transforming the thermal process from burning to volatilization. This parameter change eliminates harmful combustion byproducts while maintaining compound release through controlled heating and volatilization.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the chemical combustion process with a physical heating and volatilization process. Instead of relying on oxidative combustion, the system uses controlled electrical heating to volatilize compounds directly, substituting a chemical reaction with a physical phase change process.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If heating element power is increased to volatilize components, then volatilization efficiency improves, but combustion risk increases

Engineering Contradiction:

Improvevolatilization efficiencyVSAvoidcombustion risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements feedback control through temperature sensing and controller regulation. The controller monitors heating element temperature and adjusts power supply accordingly, providing negative feedback to maintain temperature within the safe volatilization range and prevent combustion when power levels increase.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent uses dynamic power adjustment rather than static high power. The heating element power varies over time based on heating requirements and temperature feedback, allowing efficient volatilization during active heating while automatically reducing power to prevent combustion as material is consumed or temperature rises.

Inventive Principle:

Principle #15Dynamics

3Power

If air inlet is opened to supply oxygen for heating, then heating efficiency improves, but combustion is promoted

Engineering Contradiction:

Improveheating efficiencyVSAvoidcombustion promotion

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality control by providing air inlet channels specifically positioned to supply oxygen to the heating element surface where volatilization occurs, rather than general atmospheric exposure. This localized air supply enhances heat transfer efficiency while the controlled quantity and positioning prevent sufficient oxygen for combustion.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses pneumatic principles by introducing controlled air flow through designated inlet channels to the heating zone. This controlled gas flow improves convective heat transfer and volatilization efficiency while the restricted inlet design limits total oxygen availability below combustion thresholds.

Inventive Principle:

Principle #29Pneumatics and hydraulics

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 apparatus effectively heats smokable material to volatilize components without combustion, producing an inhalable aerosol, enhancing the efficiency and safety of tobacco heating by controlling the heating process to prevent combustion.

Implementation Method 1

heating element with smokable material arranged thereon

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

heat the smokable material to volatilize the at least one component of the smokable material without combusting the smokable material

Methodology Applied

Scientific EffectVolatilization: Evaporation

Implementation Method 3

controller to regulate the heating element's power supply

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 4

inlet between the first and second connectors for admitting air into the recess from an exterior of the smoking article

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS20230120216A1Apparatus for heating smokable material

Publication Date: 2023.04.20 NICOVENTURES TRADING LTD

AI summary

Described herein is apparatus for heating smokable material to volatilize at least one component of the smokable material. The apparatus comprises a first casing portion comprising a first connector and a recess for receiving a cartridge, and a second casing portion comprising a second connector for engagement with the first connector. When engaged, the first and second connectors define an inlet between the first and second connectors for admitting air into the recess from an exterior of the smoking article.