Inductive Heating Assembly for Electronic Cigarettes

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Solution Overview

Problem

The thermal efficiency of traditional electronic cigarettes is low due to the inefficient heat transfer from the heating wire to the liquid conducting body, resulting in suboptimal aerosol formation.

Innovation Solution

A heating assembly comprising a micro-porous ceramic body with evenly distributed metallic powder and an inductive coil that generates a high-frequency magnetic field, inducing eddy currents and heat in the ceramic body to efficiently heat the tobacco liquid, forming aerosol without direct contact between the coil and the ceramic body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a heating wire wrapped around the liquid conducting body is used, then the heating assembly can heat the tobacco liquid, but the thermal efficiency is low due to inefficient heat transfer

Engineering Contradiction:

Improvethermal efficiencyVSAvoidheat transfer efficiency

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent replaces the traditional direct-contact heating wire mechanical system with an inductive heating system that uses electromagnetic fields to generate heat directly within the liquid conducting body through eddy currents, eliminating inefficient thermal conduction through contact interfaces

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the heating mechanism from thermal conduction to electromagnetic induction by introducing an inductive coil that generates a high-frequency magnetic field, transforming the physical parameters of the heating process to achieve superior thermal efficiency

Inventive Principle:

Principle #35Parameter changes

2Productivity

If a heating wire is used to heat the liquid conducting body, then aerosol can be formed, but heat loss increases and efficiency decreases

Engineering Contradiction:

Improveaerosol formation efficiencyVSAvoidheat loss

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent replaces the inefficient thermal conduction mechanism with electromagnetic induction, where the inductive coil generates a magnetic field that induces eddy currents directly in the liquid conducting body, converting electromagnetic energy to thermal energy with minimal heat loss

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces the inductive coil as an intermediary that transfers energy wirelessly through electromagnetic fields to the liquid conducting body, eliminating the need for direct thermal contact and reducing heat loss to surrounding components

Inventive Principle:

Principle #24Intermediary (Mediator)

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 configuration enhances thermal efficiency and uniform heating, leading to improved aerosol production with reduced heat loss and increased efficiency in aerosol formation.

Implementation Method 1

The inductive coil is configured for generating high frequency magnetic field in response to an alternating current, so that eddy current and heat are generated in the liquid conducting and heating body

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

Methodology Applied

Scientific EffectEddy current: Eddy Currents

Implementation Method 3

Methodology Applied

Scientific EffectInduction heating: Induction Heating

Implementation Method 4

The liquid conducting and heating body includes a micro-porous ceramic main body and a metallic powder evenly distributed in the ceramic main body

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS10939703B2Heating assembly, atomizer and electronic cigarette having same

Publication Date: 2021.03.09 SHENZHEN FIRST UNION TECH CO LTD

AI summary

An exemplary heating assembly includes a liquid conducting and heating body and an inductive coil corresponding to the liquid conducting and heating body. The liquid conducting and heating body includes a micro-porous ceramic main body and a metallic powder evenly distributed in the ceramic main body. The inductive coil is configured for generating high frequency magnetic field in response to an alternating current, so that eddy current and heat are generated in the liquid conducting and heating body. The liquid conducting and heating body is configured for absorbing tobacco liquid and heating the tobacco liquid to form aerosol.