Resilient Seal Airflow Control for E-Cigarette Draw Resistance
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Solution Overview
Problem
E-cigarettes face challenges in providing a consistent user experience due to variations in draw resistance and the risk of e-liquid leakage, which affect the reliability and accuracy of airflow detection and dynamic control of the device.
Innovation Solution
The e-cigarette design incorporates an atomiser with an air passage and a resilient seal that controls airflow through a channel, preventing air from entering the air passage except through this channel, thereby regulating draw resistance and preventing e-liquid leakage into the control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If air inlets are provided with larger combined air flow area than cartomizer inlet, then air flow supply is improved, but draw resistance control becomes inconsistent
Solution Approach 1:
A flexible membrane is positioned over the air inlet(s) to dynamically adjust the effective air flow area. The membrane can deform in response to pressure differentials or user inhalation, allowing the system to maintain consistent draw resistance while still providing adequate air supply capacity. This flexible barrier modulates airflow in real-time to resolve the contradiction between supply capacity and control consistency.
2Reliability
If resilient seal is used to control airflow through channel, then draw resistance consistency is improved, but device complexity increases
Solution Approach 1:
The resilient seal automatically adjusts airflow resistance in response to user inhalation without requiring external control mechanisms. When a user inhales, the pressure differential causes the resilient seal to deform and open the channel, allowing air flow. When not in use, the seal returns to its original position, restricting flow. This self-regulating mechanism maintains consistent draw resistance while avoiding complex electronic or mechanical control systems.
3Ease of manufacture
If resilient material defines channel size, then manufacturing flexibility is improved, but manufacturing precision becomes harder to control
Solution Approach 1:
Instead of precisely manufacturing fixed channel dimensions, the invention uses resilient material properties (such as durometer, thickness, and compression set) as the controlling parameters for channel size. The channel effective opening is determined by the resilient material's deformation characteristics under operating conditions rather than its initial manufactured dimensions. This allows for easier manufacturing while maintaining functional precision through material property control.
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 ensures a consistent draw resistance and reduces the risk of e-liquid leakage, enhancing user experience and the reliability of airflow detection and dynamic control.
Implementation Method 1
at least one resilient seal which acts to restrict / prevent air from the air inlet travelling to the air passage except through the channel. The seal comprises a resilient material and the size of the channel is defined at least in part by the resilient material to control resistance to draw
Implementation Method 2
an atomiser for vaporising a liquid
Implementation Method 3
heating a liquid material from a reservoir to form an aerosol
Data Source
Figure 1~2
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AI summary
A vapour provision device (100) including: an atomiser (200) for vaporising a liquid; an air passage through the atomiser, the air passage exiting the e-cigarette at a mouthpiece (250); at least one air inlet (214), joined by a channel to the air passage through the atomiser; and at least one resilient seal (910) which acts to restrict air from the air inlet travelling to the air passage except through the channel.