Smoking Heater Layout With Downstream Partial Substrate Heating

Solution Overview

Problem

Existing electrically heated smoking systems experience significant aerosol condensation on internal walls and require high energy consumption due to inefficient heating element placement and design.

Innovation Solution

The heating element is positioned partially along the aerosol forming substrate, towards the downstream end, with a non-heated portion upstream to act as a filtration zone, reducing condensation and energy requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the heating element is positioned to heat the entire aerosol forming substrate, then complete aerosol generation is achieved, but aerosol condensation on internal walls increases and energy consumption rises

Engineering Contradiction:

Improveaerosol generation efficiencyVSAvoidaerosol condensation on internal walls

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The heating element is segmented to heat only a specific portion of the aerosol forming substrate (downstream end) rather than the entire substrate. This partial heating approach generates sufficient aerosol while leaving upstream portions unheated, preventing condensation on internal walls and reducing overall energy consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the aerosol forming substrate are treated differently: the downstream end is heated to generate aerosol, while the upstream end remains unheated to act as a filtration zone. This local differentiation optimizes both aerosol generation efficiency and prevents harmful condensation.

Inventive Principle:

Principle #3Local quality

2Productivity

If the heating element is positioned to heat the entire aerosol forming substrate, then complete aerosol generation is achieved, but energy consumption increases

Engineering Contradiction:

Improveaerosol generation efficiencyVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The heating element is segmented to heat only a specific portion of the aerosol forming substrate (downstream end) rather than the entire substrate. This partial heating approach generates sufficient aerosol while leaving upstream portions unheated, preventing condensation on internal walls and reducing overall energy consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of heating the entire substrate (excessive action), the patent applies partial heating to only the necessary downstream portion. This partial action is sufficient to generate the required aerosol while significantly reducing energy consumption compared to full heating.

Inventive Principle:

Principle #16Partial or excessive action

3Loss of time

If the heating element is positioned upstream, then aerosol generation starts early, but condensation occurs on internal walls and cleaning frequency increases

Engineering Contradiction:

Improvetime to first puffVSAvoidcondensation requiring cleaning

Core Design Contradiction:

Loss of timeVSObject-generated harmful factors

Solution Approach 1:

Instead of positioning the heating element at the upstream end (conventional approach), the patent inverts the positioning to place the heating element at the downstream end. This inversion causes aerosol to be generated later in the flow path, preventing condensation on internal walls while maintaining acceptable time to first puff.

Inventive Principle:

Principle #13The other way round (Inversion)

4Stability of the object's composition

If the heating element extends fully along the aerosol forming substrate, then uniform heating is achieved, but energy consumption and condensation increase

Engineering Contradiction:

Improveuniform heating distributionVSAvoidenergy consumption

Core Design Contradiction:

Stability of the object's compositionVSUse of energy by moving object

Solution Approach 1:

The heating element is segmented to heat only a specific portion of the aerosol forming substrate (downstream end) rather than the entire substrate. This partial heating approach generates sufficient aerosol while leaving upstream portions unheated, preventing condensation on internal walls and reducing overall energy consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the aerosol forming substrate are treated differently: the downstream end is heated to generate aerosol, while the upstream end remains unheated to act as a filtration zone. This local differentiation optimizes both aerosol generation efficiency and prevents harmful condensation.

Inventive Principle:

Principle #3Local quality

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 minimizes aerosol condensation and reduces energy consumption while maintaining efficient aerosol delivery, requiring fewer cleaning operations and shorter time to first puff.

Implementation Method 1

a heater for heating the substrate to form the aerosol

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS20260026551A1Electrically heated smoking system with internal or external heater

Publication Date: 2026.01.29 PHILIP MORRIS USA INC

AI summary

An electrically heated smoking system for receiving an aerosol forming substrate includes a heater for heating the substrate to form the aerosol. The heater includes a heating element. The electrically heated smoking system and the heating element are arranged such that, when the aerosol forming substrate is received in the electrically heated smoking system, the heating element extends a distance only partially along the length of the aerosol forming-substrate, and the heating element is positioned towards the downstream end of the aerosol forming substrate.