Powder Inhaler Opening Control to Block Moisture Clumps
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Solution Overview
Problem
Existing inhalers risk solidification of powder due to moisture absorption, leading to clumps being inhaled by the user.
Innovation Solution
Incorporation of a weakened portion in the accommodating portion with a lower breaking strength, use of a desiccant to inhibit moisture absorption, and a transparent transport line to monitor powder flow, along with an obstructing portion to prevent clumps from reaching the user's mouth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a piercing element forms an opening in the accommodating portion, then the powder can be discharged to the user, but the opening position and size may vary causing powder clumps to reach the user
Solution Approach 1:
The accommodating portion is designed with a localized weakened portion that has different mechanical properties (lower breaking strength) compared to the rest of the structure. This localized variation ensures that the piercing element consistently forms the opening at the same position with controlled dimensions, preventing powder clumps from entering the transport line while maintaining reliable powder discharge.
2Strength
If the accommodating portion is made of strong material to prevent deformation, then structural integrity is maintained, but the piercing element cannot easily form an opening
Solution Approach 1:
The accommodating portion combines strong material throughout most of its structure with a localized weakened portion that is easier to pierce. This gradient in material properties or thickness allows the majority of the accommodating portion to maintain structural integrity and prevent powder solidification, while the weakened portion enables easy opening formation by the piercing element without requiring excessive force.
3Productivity
If the opening in the accommodating portion is made larger to facilitate powder discharge, then powder flow is improved, but powder clumps can more easily reach the user
Solution Approach 1:
The weakened portion is designed with specific dimensional characteristics that control the opening size within an optimal range. This localized design feature ensures the opening is large enough to allow smooth powder discharge and prevent solidification, yet small and consistent enough to prevent powder clumps from passing through to the user.
4Device complexity
If the piercing element is made thinner to minimize intrusion into the chamber, then interference with powder flow is reduced, but the opening formation becomes less reliable
Solution Approach 1:
The combination of a thin piercing element with the localized weakened portion creates an optimized system where the piercing element can be slender to minimize chamber intrusion, yet still form reliable openings due to the reduced breaking strength at the targeted location. The weakened portion compensates for the reduced piercing element diameter, ensuring consistent opening formation.
Data Source
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Figure 3(a)~3(b)
AI summary
Provided is a powder inhalation system including a storage unit for storing a powder for inhalation, and a powder inhaler for inhaling the powder. This powder inhalation system has: a mouthpiece having an inhalation opening; and a transport path for transporting the powder in the storage unit toward the inhalation opening. The powder inhaler has a chamber in which the storing unit is disposed, and a perforation element that is configured so as to form an opening in the storing unit disposed in the chamber. A flavor inhaler system has an obstruction part that is disposed in the transport path and obstructs the flow of a part of the powder during inhalation by the user.