Inhaler Boundary Element for Stable Capsule Rotation
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Solution Overview
Problem
Dry powder inhalers often fail to deliver nicotine particles effectively at conventional smoking regime inhalation or air flow rates, are complex to operate, and may involve moving parts, making them less suitable for consumer convenience and ease of use.
Innovation Solution
An inhaler design featuring a boundary element with concentric rings of apertures fluidly connecting a capsule cavity to a mouthpiece channel, enhancing airflow dynamics to stabilize capsule rotation and particle delivery, while maintaining a simple and convenient user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dry powder inhalers are designed to deliver particles at conventional smoking regime inhalation rates, then nicotine delivery effectiveness is improved, but device complexity increases
Solution Approach 1:
The boundary element is segmented into multiple concentric rings of apertures, with each ring serving a specific function in controlling airflow patterns. This segmentation allows the device to achieve complex fluid dynamic control without requiring a complex overall structure, resolving the contradiction between delivery effectiveness and device simplicity
Solution Approach 2:
The boundary element acts as an intermediary component between the capsule cavity and mouthpiece air channel, mediating the airflow to create stable rotation patterns. This intermediary structure enables effective nicotine delivery at conventional inhalation rates while maintaining a relatively simple device architecture
2Reliability
If dry powder inhalers use moving parts to enhance particle delivery, then particle delivery is improved, but ease of operation deteriorates
Solution Approach 1:
The inhaler design allows the airflow itself to perform the work of particle delivery through the boundary element's aperture configuration. The concentric rings automatically generate stable rotation and control particle ejection without requiring moving parts or complex user operations, achieving improved particle delivery while maintaining ease of operation
Solution Approach 2:
The design replaces mechanical moving parts with a fluid dynamic system based on the boundary element's aperture geometry. The concentric rings of apertures create automatic rotation and particle delivery through airflow patterns alone, eliminating the need for mechanical components and simplifying user operation
3Quantity of substance
If boundary element has high aperture density to enhance airflow, then fluid flow is improved, but manufacturing precision requirements increase
Solution Approach 1:
The boundary element features non-uniform aperture distribution with different aperture sizes and spacings in different regions. The concentric rings have varying aperture densities optimized for local flow requirements, allowing high overall airflow quantity while maintaining feasible manufacturing precision through localized optimization rather than uniform high-precision requirements
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 inhaler delivers nicotine particles at conventional smoking regime inhalation rates, mimicking a conventional cigarette, with stable capsule rotation and reduced airflow turbulence, ensuring effective nicotine delivery and user convenience.
Implementation Method 1
enhancing airflow dynamics to stabilize capsule rotation and particle delivery, while maintaining a simple and convenient user experience
Implementation Method 2
The boundary element includes at least two concentric rings of apertures fluidly connecting the capsule cavity with the mouthpiece air channel
Data Source
AI summary
An inhaler article (100) includes a body (110) extending along a longitudinal axis (LA) from a mouthpiece end (112) to a distal end (114). A capsule cavity (116) is defined within the body and extends along the longitudinal axis. A mouthpiece air channel (111) extends from the capsule cavity to the mouthpiece end. A boundary element (140) is located between the capsule cavity and the mouthpiece air channel. The boundary element includes at least two concentric rings of apertures (142, 144) fluidly connecting the capsule cavity with the mouthpiece air channel, wherein each of the inner apertures of the inner concentric ring has an open area less than each of the outer apertures of the outer concentric ring of apertures.