E-Cigarette Capsule Heater Height and Power Density Control
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Solution Overview
Problem
Electronic cigarettes often produce larger liquid droplets instead of vapor, leading to an unpleasant inhalation experience due to unvaporized liquid being heated into a boiling state, and existing solutions like mesh filters in the mouthpiece do not effectively address this issue without compromising vapor flow.
Innovation Solution
The design includes a capsule with a heater positioned adjacent to the liquid inlet or between the inlet and the mouthpiece, utilizing capillary action to regulate liquid flow and prevent excessive liquid from reaching the vaporizing chamber, along with a housing structure that maintains negative pressure and efficient liquid resupply to the heater, ensuring efficient vaporization and minimizing droplet formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a mesh is provided in the mouthpiece to prevent larger particles from reaching the user's mouth, then droplet formation is reduced, but vapor flow is restricted
Solution Approach 1:
The invention extracts the harmful function of the mesh (blocking droplets) and replaces it with a targeted heating approach. The heater is positioned to specifically heat only the liquid that has already reached the vaporization chamber, rather than attempting to filter all liquid particles through the mouthpiece. This eliminates the need for a mesh filter while maintaining droplet prevention.
Solution Approach 2:
The invention introduces an intermediary heating zone between the liquid reservoir and the mouthpiece. This intermediate heater selectively vaporizes liquid before it can form large droplets, acting as a mediator that converts problematic liquid into desirable vapor without requiring physical filtration.
2Temperature
If the heater is positioned in the vaporizing chamber, then vaporization occurs, but excess liquid accumulates and forms droplets
Solution Approach 1:
The heating function is segmented into two distinct zones: a first heater in the liquid reservoir for preliminary heating and a second heater in the vaporization chamber for final vaporization. This segmentation allows controlled liquid transport and prevents accumulation by distributing heating functions across different locations.
Solution Approach 2:
The invention replaces the mechanical/physical accumulation problem with a thermal solution. Instead of relying on liquid flow dynamics alone, thermal energy is applied at specific locations to control phase change, substituting thermal management for mechanical liquid handling.
3Productivity
If the heater heats the liquid until it transforms into vapor, then vaporization is achieved, but part of the liquid is brought into a boiling state forming larger droplets
Solution Approach 1:
The invention applies local quality by positioning the heater to heat only specific regions where liquid is present in the vaporization chamber, rather than heating the entire liquid reservoir. This localized heating ensures efficient vaporization of available liquid without causing bulk boiling and droplet formation.
Solution Approach 2:
The invention changes the heating parameters by using a heater positioned adjacent to the liquid inlet, which modifies the temperature distribution and heating rate. This parameter change allows controlled vaporization that prevents the liquid from reaching a boiling state that would generate large droplets.
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 solution reduces the formation of liquid projections, enhances vaporization efficiency, and maintains a satisfactory vapor flow by controlling liquid distribution and preventing boiling, resulting in a more pleasant user experience.
Implementation Method 1
the fluid transfer element provides a capillary action on liquid received therein
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 including a liquid store configured to contain a liquid to be vaporized, a vaporizing unit including 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 heater is a heating coil with a height corresponding to 25%-50% of the height of the fluid transfer element, wherein the power density of the heater is between 4000 and 7000 W/m2K, and the power density is between 1.10 to 2.350 Watt/mm2.