Cartomizer Inductive Heating for Consistent Vapor Flow

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Solution Overview

Problem

Existing electronic vaping devices face inefficiencies in vapor production due to inadequate design of the heater and wick configuration, leading to issues such as clogging, uneven vapor flow, and inefficient energy use.

Innovation Solution

The design incorporates a cartomizer with a heater circuit featuring an electrically resistive heater and a wick that draws pre-vapor formulation to a heater adjacent an air passage, connected to a power supply component with a primary coil that induces voltage in a secondary coil to heat the heater, optimizing vaporization efficiency and reducing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a traditional heater and wick configuration is used, then the device structure is simple, but vapor production efficiency is inadequate and clogging occurs

Engineering Contradiction:

Improvevapor production efficiencyVSAvoidheater and wick configuration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The device is divided into modular components: a replaceable cartomizer containing the heater and wick assembly, and a reusable power supply component. This segmentation allows optimization of the vaporization system while simplifying manufacturing and maintenance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The heater is positioned within or adjacent to the air passage, with the wick extending through the heater structure. The secondary coil is nested within or around the primary coil, creating a compact inductive heating system that maximizes space utilization.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Loss of energy

If a direct electrical connection to the heater is used, then the heating response is fast, but energy waste increases

Engineering Contradiction:

Improveenergy wasteVSAvoidheating response speed

Core Design Contradiction:

Loss of energyVSSpeed

Solution Approach 1:

The direct electrical connection is replaced with an inductive heating system using primary and secondary coils. The primary coil generates an alternating magnetic field that induces current in the secondary coil, which then heats the heater element. This electromagnetic coupling reduces energy losses and improves heating efficiency while maintaining rapid response.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The heating system uses variable frequency or variable current control of the primary coil to optimize the heating rate and energy efficiency dynamically, allowing fast heating when needed while minimizing energy consumption during normal operation.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If the cartomizer is designed as a single integrated unit, then manufacturing is simpler, but device hygiene and maintenance become difficult

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoiddevice hygiene and maintenance

Core Design Contradiction:

Ease of manufactureVSEase of repair

Solution Approach 1:

The device is segmented into a disposable cartomizer and a reusable power supply component. The cartomizer itself is further divided into functional sub-components (reservoir, wick, heater, air passage) that can be manufactured separately and assembled, simplifying manufacturing while enabling easy replacement for hygiene purposes.

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

This configuration enhances vapor production by minimizing energy waste, reducing clogging, and ensuring consistent vapor flow, while allowing for easy replacement of the cartomizer to maintain device hygiene and reduce manufacturing costs.

Implementation Method 1

A wick draws the pre-vapor formulation from the reservoir towards a heater

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

a heater that heats the pre-vapor formulation to a temperature sufficient to vaporize the pre-vapor formulation

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 3

a power source in electrical communication with a primary coil that induces voltage in the secondary coil of the heater circuit to heat the heater

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20250280874A1Electronic vaping device and components thereof

Publication Date: 2025.09.11 ALTRIA CLIENT SERVICES LLC

AI summary

A cartomizer of an electronic vaping device includes a heater circuit which is located adjacent an air passage thereof. The heater circuit includes an electrically resistive heater in electrical communication with a secondary coil. A wick extends across the air passage. The wick is configured to draw pre-vapor formulation from a reservoir toward the heater. The heater is configured to heat the pre-vapor formulation to a temperature sufficient to vaporize the pre-vapor formulation and form a vapor. The cartomizer is connectable to a power supply component which includes a power source in electrical communication with a primary coil. The power supply component is configured to induce sufficient voltage in the secondary coil of the heater circuit such that the secondary coil is configured to heat the heater and vaporize the pre-vapor formulation when the primary coil is powered by the power source.