Heating Assembly High-Frequency Induction Tobacco Heating

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Solution Overview

Problem

Conventional resistive heaters used in electronic cigarettes require preheating, have low thermal efficiency, and low thermal stability, which affects the quality of tobacco smoke.

Innovation Solution

A heating assembly that utilizes a high-frequency control assembly to generate an electromagnetic field, which induces heat in a heating element, thereby heating tobacco materials efficiently and consistently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a resistive heater is used for tobacco heating, then the heating assembly can heat the tobacco material to produce smoke, but the heating element requires preheating and has low thermal efficiency

Engineering Contradiction:

Improvethermal efficiencyVSAvoidpreheating time

Core Design Contradiction:

Loss of energyVSLoss of time

Solution Approach 1:

The patent replaces the conventional resistive heating system with a high-frequency electromagnetic induction heating system. The induction heating element generates an electromagnetic field that directly induces eddy currents in the tobacco material, heating it rapidly without requiring preheating of the heating element itself. This substitution of heating mechanism eliminates the thermal inertia problem of resistive heaters and significantly improves thermal efficiency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the heating frequency parameter to high-frequency range (20-100 kHz) to achieve rapid heating. By operating at high frequencies, the electromagnetic induction heating system achieves faster heating rates and improved thermal efficiency compared to conventional low-frequency or resistive heating methods.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If a resistive heater is used for tobacco heating, then the heating assembly can heat the tobacco material, but the thermal stability is low

Engineering Contradiction:

Improvethermal stabilityVSAvoidtemperature control stability

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The patent incorporates a temperature sensor that detects the temperature of the tobacco material in real-time and feeds this information back to the control circuit. The control circuit adjusts the power output of the high-frequency heating element based on the feedback signal, maintaining stable temperature control and preventing overheating or temperature fluctuations during the heating process.

Inventive Principle:

Principle #23Feedback

3Reliability

If electric resistance heating is used in the heating element, then heating can be achieved, but the inner and outer surfaces of the heating element stay energized which may result in short or open circuits

Engineering Contradiction:

Improveelectrical safetyVSAvoidheating element structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the electric resistance heating element with a high-frequency electromagnetic induction heating element. The induction heating element generates an electromagnetic field that induces currents in the tobacco material without direct electrical contact, eliminating the risk of short or open circuits on the heating element surfaces. This non-contact heating method inherently improves electrical safety.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 heating assembly achieves shorter preheat times, increased thermal efficiency, and higher thermal stability, resulting in improved taste and quality of tobacco smoke.

Implementation Method 1

when the high-frequency control assembly is energized, an electromagnetic filed is produced, and the heating element produces heat to heat the tobacco material

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The thermal air chamber is configured to increase heating area and heat energy, allow for air conduction and heat transfer

Methodology Applied

Scientific EffectHeat transfer: Conduction (thermal)

Data Source

PatentUS12274303B2Heating assembly

Publication Date: 2025.04.15 ASPIRE NORTH AMERICA LLC

AI summary

A heating assembly includes a main body and a high-frequency control assembly. The main body includes a heating chamber provided with a first opening. The main body further includes a heating element disposed in the heating chamber. The high-frequency control assembly is disposed outside the heating chamber. When in use, a tobacco material passes through the first opening and is disposed into the heating chamber; when the high-frequency control assembly is energized, an electromagnetic filed is produced, and the heating element produces heat to heat the tobacco material.