Capillary Wick Heater Layout for Intermittent Inhaler Evaporation

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Solution Overview

Problem

Existing inhalators face challenges in achieving high specific evaporative capacity for intermittent operation synchronous with inhalation or drawing, while maintaining high evaporator efficiency, and are often complex, costly, and prone to thermal decomposition and liquid leakage.

Innovation Solution

A planar composite design with a contact-free arrangement of the heating element and a capillary structure exposed on one or both sides, using materials like stainless steel or NiCr alloys, allows efficient heat conduction and evaporation without boiling crises, and supports ergonomic and cost-effective production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a complex evaporator construction with multiple parts is used, then the evaporative capacity can be increased, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improveevaporative capacityVSAvoidevaporator construction complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent merges the heating element and wick into a single integrated composite structure. The heating element is directly formed as part of the wick assembly, eliminating the need for separate evaporator components. This integration maintains high evaporative capacity while significantly reducing construction complexity and manufacturing cost.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The heating element serves multiple functions simultaneously: it heats the liquid material for evaporation, provides structural support for the wick, and acts as a capillary structure itself. This multi-functionality reduces the number of separate components needed, simplifying the overall device construction while maintaining productivity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Use of energy by moving object

If the heating element is closely coupled with the wick, then heat transfer efficiency is improved, but thermal decomposition and liquid leakage risks increase

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidthermal decomposition and liquid leakage

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent applies different properties to different sections of the heating element. The heating element has a capillary structure in certain sections for liquid supply, while other sections are designed for optimized heat transfer. This local differentiation allows efficient heat transfer without creating hot spots that cause thermal decomposition, while the capillary sections prevent liquid leakage through controlled capillary action.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The heating element is designed with a capillary porous structure that allows liquid material to be supplied through capillary forces. This porous structure distributes the liquid evenly across the heating surface, preventing localized overheating and thermal decomposition, while the capillary action controls liquid flow to prevent leakage.

Inventive Principle:

Principle #31Porous materials

3Productivity

If the capillary structure is exposed on both sides, then evaporative capacity is maximized, but manufacturing precision requirements increase

Engineering Contradiction:

Improveevaporative capacityVSAvoidexposure of capillary structure

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent segments the heating element into distinct functional zones: sections with exposed capillary structure for maximum evaporation and sections with protected capillary structure for controlled liquid supply. This segmentation allows the design to achieve high evaporative capacity in exposed areas while reducing manufacturing precision requirements in protected areas, as the capillary structure can be formed through standard manufacturing processes.

Inventive Principle:

Principle #1Segmentation

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 design enhances evaporative capacity, reduces thermal decomposition, and ensures safe, user-friendly operation with minimized environmental risk, while being suitable for both classic and drawing inhalators.

Implementation Method 1

a wick with a capillary structure, which wick forms a composite with the heating element and automatically resupplies the heating element with the liquid material following evaporation

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

an electric heating element for evaporating a portion of a liquid material

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 3

an electric heating element for evaporating a portion of a liquid material, wherein the vapor which is formed is mixed in the chamber with the air supplied through the air admission opening

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS12558496B2Inhaler

Publication Date: 2026.02.24 NICOVENTURES TRADING LTD

AI summary

The present disclosure relates to an inhaler component for producing a steam/air mixture or/and condensation aerosol in an intermittent and inhalation- or pull-synchronous manner, the inhaler component including: a housing; a chamber arranged in the housing; an air inlet opening for the supply of air from the surroundings to the chamber; an electrical heating element for evaporating a portion of a liquid material; and a wick having a capillary structure, which wick forms a composite structure with the heating element and automatically supplies the heating element with fresh liquid material after evaporation.