Aerosol Cartridge Chamber Seal With One-Way Backflow Valve
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Solution Overview
Problem
In aerosol generating devices, such as electronic cigarettes, the leakage of aerosol from the heating area into other parts of the device between puffs and after use can cause a build-up of residue, leading to damage and malfunctions of electronic and mechanical components.
Innovation Solution
A sealing element with a one-way valve is integrated into the chamber of the aerosol generating device, providing a fluidic seal between the consumable cartridge and the chamber. The valve prevents the flow of fluid towards the first end of the chamber, thereby blocking the ingress of aerosol into the internal components of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing element with a one-way valve is integrated into the chamber, then aerosol backflow into internal components is prevented, but device complexity increases
Solution Approach 1:
The sealing element integrates multiple functions into a single component: it provides fluidic sealing between the consumable cartridge and chamber wall, and incorporates a one-way valve to prevent aerosol backflow. This merging of sealing and valve functions into one integrated element reduces the number of separate parts needed while maintaining the reliability benefit.
Solution Approach 2:
The sealing element acts as an intermediary component positioned between the consumable cartridge and the chamber, providing both sealing and directional flow control. This intermediary structure mediates the interaction between the cartridge and chamber environment, allowing controlled aerosol flow while preventing harmful backflow into internal components.
2Reliability
If the sealing element provides a fluidic seal between the cartridge and chamber wall, then aerosol leakage is prevented, but manufacturing precision requirements increase
Solution Approach 1:
The sealing element utilizes a flexible sealing structure that can deform to conform to the cartridge and chamber wall surfaces. This flexibility compensates for minor manufacturing variations and surface irregularities, achieving effective fluidic sealing without requiring extremely tight manufacturing tolerances for the mating surfaces.
Solution Approach 2:
The sealing element design incorporates parameters such as material elasticity, cross-sectional shape, and compression characteristics that allow it to adapt to manufacturing variations. By optimizing these parameters, the seal can maintain effective fluidic sealing across a range of manufacturing tolerances, reducing the stringency of precision requirements.
Data Source
AI summary
An aerosol generation device includes a chamber for receiving a consumable cartridge, the consumable cartridge including an aerosol generating material, and a sealing element. The chamber includes a first end through which the consumable cartridge is received; a second end; and an internal side wall extending from the first end to the second end, the side wall defining the chamber between the first and second ends. The sealing element is located in the chamber, the sealing element configured to provide a fluidic seal between the consumable cartridge, when received in the chamber, and the internal side wall of the chamber. The sealing element includes a valve, the valve configured such that, flow of fluid is prevented through the valve in a direction towards the first end of the chamber.