Dry Powder Inhaler Chamber Whirl Air Flow Deaggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dry powder inhalers face challenges in effectively emptying and deaggregating powdered medicaments due to their cohesive nature, leading to agglomeration issues and inefficiencies in delivering particles of optimal size for lung absorption.
Innovation Solution
A dry powder inhaler design featuring a housing with an air inlet and outlet, a container for the medicament, and a chamber above it for deaggregation, where air flow from the inlet through the chamber helps empty and deaggregate the powder, improving delivery efficiency by creating a whirl of air that opposes the longitudinal flow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dry powder medicament is stored in a sealed container for protection from moisture, then the drug is protected from moisture, but the drug cannot be effectively emptied and deaggregated upon inhalation
Solution Approach 1:
The chamber is pre-configured with a specific geometry that generates a whirl air flow pattern when air is drawn through the inhaler. This preliminary arrangement of the chamber structure ensures that upon activation, the pre-formed vortex immediately acts on the powder in the cavity to deaggregate and empty it effectively, resolving the contradiction between sealed protection and effective delivery.
Solution Approach 2:
The invention utilizes pneumatic principles by designing the chamber to generate a whirl air flow that creates centrifugal forces and turbulence. This air flow pattern mechanically deaggregates the powder particles and drives them from the cavity through the air passage, solving the emptying and deaggregation problem while maintaining the sealed container design.
2Productivity
If small particles are used for maximum effectiveness, then lung absorption is maximized, but cohesiveness and agglomeration worsen
Solution Approach 1:
The whirl air flow generated in the chamber creates turbulent, vortex-like motion that mechanically acts on the powder particles. This dynamic air flow pattern provides mechanical energy to overcome interparticle forces and break agglomerates into smaller, respirable particles, thus maintaining particle effectiveness while addressing cohesiveness issues.
Solution Approach 2:
The invention replaces traditional mechanical deaggregation methods with a pneumatic system. The whirl air flow pattern creates fluid mechanical forces that deaggregate particles without requiring direct mechanical contact, effectively separating particles while preserving their small size for optimal lung absorption.
3Device complexity
If a single dose inhaler is designed with minimal pieces and parts for economical reasons, then cost is reduced, but emptying and deaggregation of powder becomes less effective
Solution Approach 1:
The invention merges multiple functions into a single integrated chamber structure. The chamber simultaneously serves as the deaggregation zone, the powder delivery pathway, and the interface with the air flow system. This consolidation achieves effective powder emptying and deaggregation with minimal parts, resolving the contradiction between device simplicity and functional effectiveness.
Solution Approach 2:
The chamber is designed as a multi-functional element that performs deaggregation, powder containment, air flow guidance, and particle delivery all in one component. This universal design achieves effective single-dose powder inhalation with minimal parts, balancing economical design with functional performance.
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
Enhances the emptying and deaggregation of dry powder medicaments, ensuring optimal particle size delivery for effective lung absorption and reducing waste by allowing for multiple uses or varying dosages.
Implementation Method 1
air flows from the at least one air inlet into and through the chamber to empty the drug from the cavity and convey the drug to the at least one outlet
Implementation Method 2
improving delivery efficiency by creating a whirl of air that opposes the longitudinal flow direction
Data Source
AI summary
A dry powder inhaler may include a housing having a lower housing part defining at least one air inlet and at least one air outlet. At least one container may be disposed in the lower housing part. The at least one container may include a cavity for a dry powder drug. A chamber may be disposed above the at least one container for deaggregation of the dry powder drug after emptying of the dry powder drug from the cavity. Upon inhalation by a user at the at least one air outlet, air may flow from the at least one air inlet into and through the chamber to empty the dry powder drug from the cavity and convey the dry powder drug to the at least one outlet.