Aerosol Device Housing Pressure Relief Panel
Solution Overview
Problem
Aerosol provision devices face issues with overheating or malfunctioning power sources causing pressure buildup within the housing, leading to potential damage or safety hazards due to the inability to vent gases effectively.
Innovation Solution
A housing design with a moveable panel that seals the power source compartment initially but opens to vent gases to the atmosphere when internal pressure exceeds a threshold, using a combination of attachment elements and internal supports to ensure safe pressure release without liquid ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power source receiving compartment is sealed closed by an end cap, then the device is protected from liquid ingress, but pressure builds up when the power source overheats or malfunctions
Solution Approach 1:
The patent employs a flexible membrane panel that can deform under pressure. This membrane is integrated into the housing structure and allows controlled deformation when internal pressure exceeds external pressure, enabling pressure relief while maintaining liquid protection. The flexible nature of the membrane allows it to seal effectively under normal conditions while bursting or deforming at elevated pressures.
Solution Approach 2:
The patent changes the mechanical properties of the sealing structure by using a membrane with specific burst pressure characteristics. The membrane is designed to maintain sealing integrity under normal operating pressures but will deform or rupture when pressure exceeds a predetermined threshold, thus changing the state from sealed to venting based on pressure parameters.
2Object-affected harmful factors
If a vent is provided in the housing, then pressure can be released, but liquid may ingress into the power source compartment
Solution Approach 1:
The flexible membrane panel serves as both a seal and a pressure-responsive vent. Under normal conditions, it maintains a sealed state preventing liquid ingress. When internal pressure exceeds external pressure by a sufficient margin, the membrane deforms or ruptures to allow pressure release, and the design ensures liquid ingress is prevented through the specific mechanics of membrane failure mode.
Solution Approach 2:
The membrane is designed as a sacrificial component that may rupture under extreme pressure conditions. This disposable approach allows the membrane to fail in a controlled manner to protect more critical components, after which the device would require replacement or repair of the membrane component.
3Device complexity
If the panel is fixedly attached to the housing, then the structure is simple, but the panel cannot move to vent pressure
Solution Approach 1:
The patent transitions from a static fixed attachment to a dynamic attachment system. The membrane is attached in a manner that allows it to remain fixed under normal conditions but become mobile when pressure differential exceeds a threshold. This dynamic behavior enables the panel to switch between sealing and venting functions based on operating conditions.
Solution Approach 2:
The attachment system is segmented into different zones with different attachment strengths. The membrane is attached along its periphery but allowed to detach or deform in specific regions when pressure exceeds thresholds, creating a segmented attachment pattern that enables controlled movement for pressure relief.
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
The solution effectively vents gases when pressure exceeds a predefined threshold, protecting the device from damage and ensuring user safety by allowing controlled pressure release while preventing water ingress, thus addressing the risk of overheating or malfunctioning power sources.
Implementation Method 1
when the internal pressure in the power source receiving compartment exceeds a predefined threshold
Data Source
AI summary
A housing (10) for an aerosol provision device (1) comprises an outer body (11) having a first end (12) and an opposing second end (13) spaced from the first end along a longitudinal axis and connected to the first end by a side wall (14). The housing further comprises a power source receiving compartment (15) within the outer body. An aperture (17) is located in the side wall and a panel (18) is located in the aperture in a first position in which the panel is configured to seal closed the aperture such that the power source receiving compartment is fluidly isolated from the atmosphere. The panel is moveable from the first position to a second position in which the panel is at least partially removed from the aperture, when the internal pressure in the power source receiving compartment exceeds a predefined threshold.