Aerosol Delivery System With Segmented Heater And Disposable Fluid-Transfer Article
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Solution Overview
Problem
Existing aerosol delivery systems, particularly those with heated elements, face issues such as degradation of components, residue buildup, and potential inhalation of toxicants due to long-term exposure and overheating of heater elements.
Innovation Solution
The system incorporates a fluid-transfer article with a two-layer structure, where the first layer is made of a solid polymer material with molded holes and the second layer is a heat-resistant, porous material. This design allows for efficient aerosol precursor delivery and separation from the heater, enabling easy replacement of the fluid-transfer article without replacing the heater.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heater element is continuously exposed to aerosol precursor liquid, then efficient vaporization is achieved, but degradation of the liquid and heater occurs along with residue buildup
Solution Approach 1:
The system divides the heater into two separate components: a reusable heating element and a disposable fluid-transfer article. This segmentation allows the heating element to remain free from continuous liquid exposure while the fluid-transfer article absorbs the degradation and residue buildup, resolving the contradiction between vaporization efficiency and heater reliability.
Solution Approach 2:
The fluid-transfer article is designed as a disposable component that is replaced periodically. This allows the system to maintain high vaporization efficiency when the article is fresh, while accepting that the disposable article will degrade and accumulate residues, protecting the expensive reusable heater from degradation.
2Productivity
If the heater element is exposed to aerosol precursor liquid, then vaporization occurs, but toxicant inhalation risk increases due to long-term exposure
Solution Approach 1:
The system extracts the harmful exposure function from the reusable heater by placing it in the disposable fluid-transfer article. The heater only performs its essential heating function without direct liquid contact, while the fluid-transfer article absorbs the harmful effects of long-term liquid exposure and potential toxicant generation.
Solution Approach 2:
By making the fluid-transfer article disposable, the system eliminates the accumulation of toxicants that would occur with continuous heater exposure. Each new article starts fresh without accumulated degradation products, thereby reducing toxicant inhalation risk while maintaining aerosol generation capability.
3Duration of action of stationary object
If the heater is designed for long-term use, then system longevity is improved, but residue buildup and degradation occur
Solution Approach 1:
The system segments the heating function from the fluid contact function. The reusable heater provides long-term service without direct liquid exposure, while the disposable fluid-transfer article absorbs residue buildup and degradation, allowing the heater to maintain its lifespan without suffering from substance loss.
Solution Approach 2:
The fluid-transfer article acts as an intermediary between the heater and the aerosol precursor liquid. It protects the heater from direct contact with the liquid, preventing residue buildup on the heater surface while still enabling efficient heat transfer to vaporize the liquid.
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 design enhances the longevity and safety of the aerosol delivery system by preventing degradation and residue buildup, allowing for efficient aerosol generation and inhalation while maintaining a clean and safe environment for the user.
Implementation Method 1
a heater configured to heat an aerosol precursor to generate an aerosolised composition for inhalation by a user
Implementation Method 2
the vaporization of a liquid containing nicotine and entrainment of the vapour into an airstream
Implementation Method 3
The carrier comprises a substrate formed of a 'wicking' material, which can absorb aerosol precursor liquid from a reservoir and hold the aerosol precursor liquid
Implementation Method 4
Released aerosol precursor is entrained into the airstream to be borne by the airstream to an outlet of the device or system
Data Source
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AI summary
An aerosol delivery system has a fluid-transfer article which holds an aerosol precursor, and which is arranged to transfer the aerosol precursor to a second region of the fluid-transfer article. The second region has a first part adjacent to a first region of a first material, and has holes therein which receive aerosol precursor from the first region. The second region also has a second part of a second material, which second part is adjacent to the first part, is of porous material and extends across the holes in the first part. The second material is resistant to higher temperatures than the first material. Since the second part of the second region is porous, aerosol precursor will pass therethrough from the holes to an activation surface of the fluid-transfer article. A heater contacts part of that activation surface to heat it to release aerosol precursor in the form of a vapour therefrom. The heater is not bonded to the activation surface, but is separable therefrom. The second part of the second region has one or more recesses therein opening towards the heater. The recesses form at least one gap between the activation surface and the heater, with the at least one gap forming at least one air-flow pathway along the activation surface.