Infrared Sleeve Heating Structure for Aerosol Substrate Control

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Solution Overview

Problem

Existing heating structures in heat-not-burn atomization devices face issues with overheating of the aerosol generating substrate due to direct heat transfer, requiring complex assembly processes and limited maximum operating temperatures below 400°C, which affect vaping experience and efficiency.

Innovation Solution

A heating structure with a sleeve and a partially bent heating element that radiates infrared light waves, allowing the element to operate at temperatures up to 500°C to 1300°C, reducing overheating and simplifying assembly by enabling the free ends of the element to be led out from the same sleeve end.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If direct heat transfer through solid material is used, then heating efficiency is improved, but substrate overheating occurs

Engineering Contradiction:

Improveheating efficiencyVSAvoidsubstrate overheating

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an infrared-transparent sleeve as an intermediary between the heating element and the substrate. This sleeve allows infrared radiation to pass through while preventing direct contact and excessive heat transfer, thus maintaining heating efficiency while avoiding substrate overheating.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct thermal conduction through solid material contact with infrared radiation heating. The heating element generates infrared radiation that passes through the transparent sleeve to heat the substrate, substituting mechanical contact-based heat transfer with electromagnetic radiation-based heating.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If heating element operates at high temperature (400°C+), then atomization efficiency is improved, but assembly process becomes complex

Engineering Contradiction:

Improveatomization efficiencyVSAvoidassembly process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent merges the heating element and sleeve into an integrated assembly where the heating element is positioned within the sleeve. The free ends of the heating element are led out from the same end of the sleeve, combining multiple components into a unified structure that simplifies assembly while enabling high-temperature operation for improved atomization efficiency.

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If heating element operates at controlled temperature (<350°C), then substrate overheating is prevented, but atomization efficiency decreases

Engineering Contradiction:

Improvesubstrate overheating preventionVSAvoidatomization efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The infrared-transparent sleeve acts as a mediator that allows the heating element to operate at high temperatures (400°C+) while controlling the heat transfer to the substrate. The sleeve transmits infrared radiation efficiently while preventing direct thermal contact, enabling both high atomization efficiency and substrate temperature control.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the temperature parameter of the heating element from controlled low temperature (<350°C) to high temperature (400°C+), while using the infrared-transparent sleeve to manage the actual substrate temperature. This parameter change enables improved atomization efficiency while the sleeve ensures substrate overheating is prevented.

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

The solution prevents substrate overheating, improves vaping experience, reduces preheating time, and enhances atomization efficiency and stability while simplifying the assembly process.

Implementation Method 1

a heating element at least partially spaced apart from the sleeve, the heating element comprising a heating substrate configured to generate heat in a powered-on state; and an infrared radiating layer arranged on an outer surface of the heating substrate and configured to radiate infrared light waves

Methodology Applied

Scientific EffectInfrared radiation: Infrared Radiation

Implementation Method 2

the heating element is configured to radiate infrared light waves, wherein the sleeve is configured to be allow the infrared light waves to pass through

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Data Source

PatentUS20250275575A1Aerosol-generating device and heating structure

Publication Date: 2025.09.04 SMOORE INTERNATIONAL HOLDINGS LIMITED

AI summary

A heating structure includes: a sleeve; a heating element at least partially spaced apart from the sleeve, the heating element including a heating substrate configured to generate heat in a powered-on state; and an infrared radiating layer arranged on an outer surface of the heating substrate for radiating infrared light waves. The sleeve allows the infrared light waves to pass through. The heating element is at least partially bent and has a first free end and a second free end. The sleeve has two end portions distributed along a longitudinal direction. The first free end and the second free end are led out from a same end portion of the sleeve.