Elastomeric Reservoir for Electronic Smoking Device Leakage Prevention
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Solution Overview
Problem
Electronic smoking or vaporizing devices with rigid cartridge housings face issues of liquid leakage due to thermal expansion and bubble formation, which disrupts liquid flow to the atomizer.
Innovation Solution
A liquid supply system with a soft, adaptable reservoir that compensates for pressure changes by contracting as liquid is consumed, preventing gas formation and leakage, and featuring a liquid conducting component to ensure continuous flow and a valve for pressure regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid cartridge housing is used to store liquid, then the housing provides structural support and containment, but gas phase expansion due to thermal increase creates positive pressure causing liquid leakage
Solution Approach 1:
The cartridge housing transitions from a rigid structure to a flexible membrane structure that can dynamically expand and contract. The flexible membrane is pre-tensioned to provide structural support while allowing controlled deformation in response to pressure changes, enabling the housing to adapt its volume to accommodate gas phase expansion without creating excessive positive pressure that would cause leakage.
Solution Approach 2:
The invention changes the physical parameters of the housing from rigid to flexible, and introduces pre-tension as a controlling parameter. The flexible membrane's tension state can be adjusted to control the pressure-volume relationship, allowing the housing to maintain structural integrity while accommodating thermal expansion of the gas phase through controlled volume changes.
2Strength
If a rigid cartridge housing is used to store liquid, then the housing provides structural support, but the gas phase forms bubbles in the liquid which interfere with flow to the atomizer
Solution Approach 1:
The flexible membrane housing dynamically adjusts its volume in response to liquid consumption and gas phase changes. As liquid is consumed, the membrane contracts to maintain a gas-free liquid environment, preventing bubble formation that would interfere with liquid flow to the atomizer while maintaining structural support throughout the process.
3Reliability
If pre-tension is applied to the reservoir by stretching an elastomeric material, then the reservoir can compensate for pressure changes, but the device complexity increases
Solution Approach 1:
The structural housing and pressure compensation mechanism are merged into a single flexible membrane structure. The elastomeric material itself provides both the structural containment function and the pressure compensation function through its elastic properties, eliminating the need for separate rigid housing and independent pressure regulation mechanisms.
Solution Approach 2:
The flexible membrane housing performs self-regulation of pressure and volume through its inherent elastic properties. The pre-tensioned membrane automatically expands and contracts in response to internal pressure changes and liquid consumption without requiring external control systems, valves, or additional active components, thereby achieving pressure compensation with minimal device complexity.
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 system prevents leakage and bubble interference, ensuring consistent liquid flow to the atomizer by maintaining a gas-free environment and regulating pressure, thus enhancing the performance and reliability of electronic smoking devices.
Implementation Method 1
The reservoir, which may be provided as bottle, balloon or a bladder having an internal volume that adapts to the outflow of the liquid
Implementation Method 2
The reservoir can be pre-tensioned or elastically stretched when filled with liquid. The pre-tension is gradually released with the outflow of the liquid and in turn the reservoir is allowed to contract.
Implementation Method 3
The liquid conducting component can be a gasket or pad that is in fluid communication with the wick
Data Source
AI summary
A liquid supply for electronic smoking device has a compartment (102) within a housing (100). A reservoir (200) is provided in the compartment (102) for storing liquid, with at least one portion the reservoir (200) attached to the housing (100). The reservoir (100) contracts as liquid flows out of the reservoir (200). The reservoir (200) does not collapse or fold as it contracts, to avoid interfering with outflow of liquid. The reservoir (200) may comprise an elastomeric material, such as rubber. The reservoir (200) may be pretensioned or elastically stretched when filled with liquid. The reservoir (200) then exerts an elastic compression force on the liquid in the reservoir (200).