Electronic Cigarette Capsule With Capillary Vaporization Control
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Solution Overview
Problem
Electronic cigarettes often produce unvaporized liquid droplets that escape through the mouthpiece, causing an unpleasant experience for users, and existing solutions like meshes do not adequately prevent this while maintaining satisfactory vapor flow.
Innovation Solution
The capsule design includes a heater positioned adjacent to the liquid inlet, utilizing capillary action to regulate liquid flow, a housing with a seal having a larger cross-sectional height than width, and a fluid transfer element with controlled liquid inlets to minimize droplet formation by promoting vaporization over boiling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a mesh is provided in the mouthpiece to prevent larger droplets, then droplet filtration is improved, but vapor flow is restricted
Solution Approach 1:
The mesh filtration system is removed from the mouthpiece. Instead, droplet prevention is achieved by extracting and controlling the root cause - the liquid supply mechanism - through capillary action regulation and heater positioning, eliminating the need for post-vaporization filtration
Solution Approach 2:
A capillary wick is introduced as an intermediary between the liquid store and heater to regulate liquid supply. This mediator controls the rate at which liquid reaches the heating element, preventing excessive liquid accumulation that would cause droplet formation, while maintaining adequate vaporization
2Productivity
If the heater is positioned away from the liquid inlet, then vaporization is improved, but liquid flow control is lost
Solution Approach 1:
The heater is positioned locally adjacent to the liquid inlet rather than uniformly distributed. This localized heating zone directly at the liquid supply point enables precise control over the vaporization process, allowing efficient conversion of liquid to vapor while maintaining liquid flow control through the capillary wick
3Object-affected harmful factors
If capillary action is used to regulate liquid flow, then droplet formation is reduced, but device complexity is increased
Solution Approach 1:
A capillary wick made from porous material is used to regulate liquid flow from the liquid store to the heater. The porous structure provides capillary action that automatically controls liquid supply based on vaporization demand, eliminating the need for complex mechanical pumps or valves while preventing droplet formation
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 effectively reduces the formation of liquid projections by optimizing vaporization, maintaining efficient vapor flow, and preventing unsatisfactory droplets from reaching the user.
Implementation Method 1
the fluid transfer element provides a capillary action on liquid received therein
Implementation Method 2
Vaporization is achieved by a vaporizer or heater unit which typically comprises a heating element in the form of a heating coil and a fluid transfer element. The vaporization occurs when as the heater heats up the liquid in the wick until the liquid is transformed into vapor
Data Source
AI summary
A capsule for an electronic cigarette has a first end for engaging with an electronic cigarette device and a second end configured as a mouthpiece portion having a vapor outlet. The capsule further includes a liquid store configured to contain a liquid to be vaporized, a vaporizing unit comprising a heater and a fluid transfer element, the vaporizing unit being arranged within a vaporizing chamber, a main vapor channel extending from the vaporizing chamber to the vapor outlet in the mouthpiece, and a housing enclosing the liquid store and the vaporizing unit, wherein the fluid transfer element is fluidly connected to the liquid store by at least one liquid inlet and the fluid transfer element provides a capillary action on liquid received therein, wherein the heater is provided at a position that is substantially adjacent the liquid inlet, or at a position between the liquid inlet and the mouthpiece.