Aerosol Generating Arrangement with Pressure-Regulating Capillary Conveyer
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Solution Overview
Problem
Capillary liquid conveyers in aerosol-generating arrangements face issues with uncontrolled imbibition leading to leakage and variations in aerosol generation due to the physics of capillary action, resulting in inconsistent aerosol production.
Innovation Solution
An aerosol-generating arrangement that incorporates a capillary liquid conveyer with an air duct featuring an ejector portion and expansion zone, utilizing Bernoulli's principle to induce a controlled pressure drop and airflow, which draws aerosol-forming liquid from a reservoir to an evaporation section, allowing for precise control over liquid flow and aerosol generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a capillary liquid conveyer is used to convey aerosol-forming liquid from reservoir to evaporation section, then liquid transport is achieved without external power, but uncontrolled imbibition occurs causing leakage and variations in aerosol generation
Solution Approach 1:
A pressure-regulating element is introduced as an intermediary component between the reservoir and the capillary liquid conveyer. This element mediates the liquid flow by regulating the pressure differential that drives capillary action, thereby preventing uncontrolled imbibition while maintaining automatic liquid transport. The pressure-regulating element acts as a control valve that modulates the driving force of the capillary conveyer.
Solution Approach 2:
The invention changes the pressure parameter in the liquid conveyance system by introducing a pressure-regulating element. This element dynamically adjusts the pressure differential across the capillary conveyer, transforming the uncontrolled high-pressure imbibition into a controlled, steady-state flow. The parameter change from unregulated to regulated pressure differential resolves the contradiction between automatic transport and flow control.
2Device complexity
If capillary action is used for liquid conveyance, then device complexity is reduced, but manufacturing precision requirements increase to control imbibition
Solution Approach 1:
The pressure-regulating element serves as a mediator that compensates for variations in capillary dimension manufacturing precision. By introducing this intermediate component, the system becomes less sensitive to minor dimensional variations in the capillary structure, as the pressure regulator can adjust flow rates to maintain consistent performance despite manufacturing tolerances.
Solution Approach 2:
The invention introduces dynamic pressure regulation to compensate for static manufacturing imprecisions. The pressure-regulating element can dynamically adjust operating conditions to accommodate variations in capillary dimensions, transforming a static, precision-dependent system into a dynamic, self-adjusting system that tolerates manufacturing variations.
3Object-generated harmful factors
If uncontrolled imbibition is prevented, then leakage is reduced, but liquid flow rate control becomes more difficult
Solution Approach 1:
The pressure-regulating element acts as a mediator that simultaneously addresses leakage prevention and flow control. By regulating the pressure differential, it prevents the excessive imbibition that causes leakage while maintaining a controlled, adjustable flow rate. The intermediary component provides dual functionality: preventing harmful leakage and enabling precise flow control.
Solution Approach 2:
The pressure-regulating element incorporates feedback mechanisms to monitor and adjust liquid flow rates. By sensing flow conditions and dynamically adjusting pressure regulation, the system prevents leakage while maintaining ease of flow control. The feedback loop ensures that the system automatically compensates for flow variations without requiring complex external control systems.
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 provides enhanced control over the liquid flow rate and aerosol generation, preventing uncontrolled leakage and ensuring consistent aerosol production by using a user-induced airflow to manage the pressure drop and liquid flow through the capillary conveyer.
Implementation Method 1
The air jet generating member is arranged and configured to generate an air jet in the airflow through the air duct causing a drop of the static air pressure in the vicinity of the evaporation section. The physical mechanism behind the static pressure drop as seen from a microscopic view is as follows: Fast moving air particles in the air jet ejecting into open atmosphere downstream the air jet generating member collide with air particles that are randomly and slowly wandering around.
Implementation Method 2
a capillary liquid conveyer for conveying aerosol-forming liquid from the liquid reservoir via a reservoir orifice to an evaporation section of the liquid conveyer outside the reservoir
Implementation Method 3
a capillary liquid conveyer for conveying aerosol-forming liquid from the liquid reservoir via a reservoir orifice to an evaporation section of the liquid conveyer outside the reservoir, wherein the air jet generating member is arranged and configured to generate an air jet in the airflow through the air duct causing a drop of the static air pressure in the vicinity of the evaporation section
Data Source
AI summary
An aerosol-generating arrangement for generating an aerosol from an aerosol-forming liquid is provided, the arrangement including a liquid reservoir for storing aerosol-forming liquid and a capillary liquid conveyer for conveying the liquid from the reservoir via a reservoir orifice to an evaporation section of the conveyer outside the reservoir; an air duct for passing an airflow past the evaporation section and including an ejector portion including an air jet generator and an expansion zone downstream of the air jet generator, the air jet generator being arranged to generate an air jet in the airflow through the air duct causing a drop of the static air pressure in the vicinity of the evaporation section, in which the conveyer includes one of a filament bundle, or at least one capillary channel, or at least one capillary tube, or two opposing plates, or a capillary pipe.