Delivery Device End-Cap Venting for Pressure Relief
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Solution Overview
Problem
Existing delivery devices for aerosol generation, such as electronic cigarettes and tobacco heating products, face issues with pressure build-up and misactivation due to sealed housings, which can lead to malfunction or unsafe conditions during use or charging.
Innovation Solution
A delivery device with a vent opening in the end cap and a gas permeable membrane to allow gas escape, combined with a pressure sensor to activate the device based on user draw and a conduit system for fluid communication between components, including a buzzer or speaker for enhanced sound delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing is sealed to protect internal components, then device reliability is improved, but pressure build-up occurs causing misactivation or malfunction
Solution Approach 1:
A gas permeable membrane is incorporated into the end cap to allow gas molecules to pass through while maintaining a sealed appearance. This membrane prevents pressure build-up by enabling gas escape without requiring a large open vent, thus resolving the contradiction between sealed housing for reliability and pressure prevention.
Solution Approach 2:
A vent opening is extracted from the end cap to provide a dedicated pathway for gas escape. This separate venting mechanism allows the main housing to remain sealed for protection while the extracted vent component handles pressure release, preventing misactivation and malfunction.
2Object-affected harmful factors
If a vent opening is added to allow gas escape, then pressure build-up is prevented, but device complexity increases
Solution Approach 1:
The vent opening functionality is merged into the existing end cap structure rather than being implemented as a separate component. The end cap simultaneously serves as a closure element and a venting mechanism, reducing overall device complexity while still preventing pressure build-up.
Solution Approach 2:
The gas permeable membrane integrated into the end cap provides venting functionality without requiring additional complex mechanisms. The membrane's inherent porosity allows gas passage while maintaining a simple, clean design that does not significantly increase device complexity.
3Illumination intensity
If the vent opening is positioned near the buzzer or speaker, then acoustic performance is enhanced, but gas escape may be interfered with
Solution Approach 1:
The end cap is designed with differentiated zones: one area optimized for acoustic transmission near the buzzer/speaker to enhance sound delivery, and another area with the vent opening positioned to ensure unobstructed gas escape. This local quality differentiation resolves the contradiction between acoustic enhancement and gas escape functionality.
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
Prevents pressure build-up, reduces misactivation, ensures safe operation, and maintains device functionality by allowing gas escape and enhancing acoustic performance.
Implementation Method 1
a membrane formed from a gas permeable material may extend over the vent opening in the end cap
Implementation Method 2
a pressure sensor in the housing, the pressure sensor being configured to detect when a user draws on the device through the mouthpiece
Implementation Method 3
The buzzer or speaker may be disposed within the housing so as to generate a sound wave in the conduit
Data Source
AI summary
A delivery device is disclosed and includes an elongate housing; a battery received in the housing; an end cap attached to and closing an end of the housing; and a vent opening in the end cap in fluid communication with the battery. A delivery system including the delivery device and a substrate aerosolizing module including a heater and a consumable having an aerosolizable substrate is also disclosed. The substrate aerosolizing module is configured to aerosolize the substrate in response to activation of the delivery device. Also disclosed is an end cap attachable to an end of a housing of the delivery device, and a delivery device and an accessory for charging the delivery device.