Class-F Amplifier Circuit for Compact Aerosol Heating Control

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Solution Overview

Problem

Existing aerosol generating devices face challenges in efficiently controlling power for induction heating, leading to size limitations and inefficiencies in portable designs.

Innovation Solution

An aerosol generating device utilizing a class-F amplifier to amplify power signals and eliminate harmonic components, ensuring efficient power delivery to a heating body through a filter, thereby optimizing power control and reducing device size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional power amplification is used for induction heating, then heating power is provided, but harmonic components cause power loss and reduced efficiency

Engineering Contradiction:

Improvepower lossVSAvoidheating power

Core Design Contradiction:

Loss of energyVSPower

Solution Approach 1:

The patent extracts and removes harmful harmonic components from the amplified power signal using a filter circuit. The filter is specifically designed to eliminate harmonic frequencies while preserving the fundamental heating frequency, thereby reducing power loss without compromising heating effectiveness.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the harmful harmonic components generated during power amplification into a beneficial filtering process. By identifying and removing these harmonics, the system transforms what would be wasted energy into improved power efficiency and reduced thermal loss.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Volume of moving object

If device size is reduced for portability, then spatial advantages are gained, but power control efficiency deteriorates

Engineering Contradiction:

Improvedevice sizeVSAvoidpower control efficiency

Core Design Contradiction:

Volume of moving objectVSLoss of energy

Solution Approach 1:

The patent combines the power amplification function with the harmonic filtering function into an integrated amplifier circuit module. This merging allows the device to maintain efficient power control with reduced size by eliminating the need for separate, bulky filtering components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent optimizes the electrical parameters of the amplifier circuit, including operating frequency and impedance matching, to achieve efficient power delivery in a compact form factor. By carefully selecting and adjusting these parameters, the device maintains high power control efficiency despite reduced physical dimensions.

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

This solution enables efficient power control for induction heating, minimizing the device's size while maximizing spatial advantages and improving signal linearity.

Implementation Method 1

generates a first signal by amplifying a power signal provided by the battery through a switching element

Methodology Applied

Scientific EffectPower amplification through switching element:

Implementation Method 2

generates a second signal through a filter by eliminating a harmonic component from the first signal

Methodology Applied

Scientific EffectHarmonic component elimination through filtering: Filter (electronic)

Implementation Method 3

a heating body configured to heat at least a part of an aerosol generating article

Methodology Applied

Scientific EffectInduction heating: Induction Heating

Data Source

PatentUS20240213936A1Aerosol generating device for controlling heating through power amplification and operating method thereof

Publication Date: 2024.06.27 KT&G CO LTD

AI summary

According to an embodiment, an aerosol generating device includes: a battery configured to provide power; a heating body configured to heat at least a part of an aerosol generating article; and an amplifier circuit electrically connected to the battery and the heating body, wherein the amplifier circuit generates a first signal by amplifying a power signal provided by the battery through a switching element, generates a second signal through a filter by eliminating a harmonic component from the first signal, and delivers the second signal to the heating body.