Powder Inhaler False Air Inlets Aerodynamic Balance
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Solution Overview
Problem
Existing dry powder inhalers face limitations in achieving adequate lung deposition profiles, particularly in lower lung stages, due to restricted inhalation resistance and fine particle fraction distribution, which affects the therapeutic efficacy of respiratory medications.
Innovation Solution
The introduction of false air inlets that provide an additional airflow concurrently with the main inhalation flow, influencing the internal aerodynamic balance and de-agglomeration process, allowing for improved air flow distribution and inhalation pressure, thereby enhancing the release profile and deposition of active substances in lung stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional single air inlet is used, then device structure is simple, but lung deposition profile is inadequate especially in lower lung stages
Solution Approach 1:
The single air inlet is segmented into multiple air inlets (first air inlet and second air inlet) with different positions and functions. The first air inlet introduces air at a first position while the second air inlet introduces air at a second position, allowing differential control of airflow to optimize particle delivery to different lung regions including lower lung stages.
Solution Approach 2:
The invention adds a spatial dimension to airflow control by positioning air inlets at different locations and orientations. The second air inlet is positioned at an angle relative to the first air inlet, creating multi-directional airflow patterns that enhance particle dispersion and deposition in previously under-reached lung regions.
2Manufacturing precision
If restricted inhalation resistance is used, then device operation is simple, but fine particle fraction distribution is inadequate
Solution Approach 1:
The inhalation resistance is made dynamic through the interaction of multiple air inlets that respond to user inhalation flow. The system adapts airflow resistance in real-time based on inhalation intensity, allowing optimization of fine particle fraction distribution across different inhalation phases while maintaining ease of operation.
Solution Approach 2:
The invention changes the parameter of inhalation resistance by introducing multiple air inlets with different flow characteristics. This allows the system to modulate resistance dynamically, optimizing the balance between operational simplicity and fine particle fraction distribution control.
3Productivity
If single airflow path is used, then aerodynamic balance is simple, but de-agglomeration efficiency is insufficient
Solution Approach 1:
The single airflow path is segmented into multiple airflow paths corresponding to different air inlets. Each airflow path contributes differently to the overall aerodynamic environment, enhancing de-agglomeration efficiency through coordinated multi-path airflow while maintaining relatively simple device structure.
Solution Approach 2:
Multiple airflow paths are merged into a unified de-agglomeration chamber where their combined effects enhance particle breakdown. The first and second air inlets work together synergistically to create optimized airflow patterns that improve de-agglomeration efficiency without requiring complex separate 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 significantly improves the flexibility of dry powder inhalers to achieve desired lung deposition profiles, particularly in lower lung stages, by rebalancing air flow and inhalation resistance, ensuring higher percentages of active substances reach the lower lung regions, enhancing the clinical effectiveness of respiratory medications.
Implementation Method 1
one or more false air inlets (20) that provide an additional or secondary air flow concurrently with the main air flow which conducts the medication and, through a de-agglomeration chamber and mouthpiece portion, such additional flow is mixed with the main inhalation flow, providing a new parameter for influencing the internal aerodynamic balance on the device and pattern of effectiveness for formulation de-agglomeration given by said "aeration effect on the formulation"
Implementation Method 2
through a de-agglomeration chamber and mouthpiece portion, such additional flow is mixed with the main inhalation flow, providing a new parameter for influencing the internal aerodynamic balance on the device and pattern of effectiveness for formulation de-agglomeration
Data Source
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AI summary
Powder inhaler, consisting of a base housing (1), snap-in capsule receptacle (2a) mounted together with a lid (2b); a moveable mouthpiece (4) with cap (5) and guided by lateral stems (6) and vertical guide (7); a perforation device (10) for opening the capsule; a flow guide tube, centralized and housed in the mouthpiece and on the guide; a de- agglomeration chamber formed above the housing of the capsule; a vertical passage formed between said de-agglomeration chamber and the upper edge of the mouthpiece; a secondary air intake point positioned between the walls of the capsule receptacle and the base housing which in turn has one or two air intake points with a pocket and include one or more secondary air flow passages.