Metered-Dose Atomization Module Sealing and Vibration Control
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Solution Overview
Problem
Traditional vibrating mesh atomizers face issues due to poor dimensional accuracy and consistency of silicone gaskets, leading to unbalanced forces during vibration, which affects the sealing effect and atomization rate.
Innovation Solution
A metered-dose atomization module is designed with a spray head, an atomization piece featuring an annular brake and a microporous membrane, rubber rings for sealing, and a pressing plate to stabilize the atomization piece, ensuring consistent vibration and improved sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure is increased to suppress radial movement of the atomization piece, then sealing effect is improved, but atomization rate decreases
Solution Approach 1:
The sealing function is segmented from the top shell structure and assigned to dedicated sealing components (sealing rings or seals) positioned at the periphery. This allows the central atomization piece to vibrate freely while the periphery maintains sealing through dedicated components that constrain radial movement only when necessary.
Solution Approach 2:
A pressing plate or pressing member is introduced as an intermediary component between the top shell and the atomization piece. This intermediary transmits only the necessary axial pressing force to maintain sealing contact, while allowing radial movement to be constrained by separate sealing components, thus decoupling the conflicting requirements of sealing and atomization.
2Stability of the object's composition
If dimensional accuracy of silicone gasket is improved, then radial movement of atomization piece is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent replaces the expensive, high-precision silicone gasket with simpler, more economical sealing components such as sealing rings or elastomeric seals that can be manufactured with standard tolerances. These components are designed to provide adequate sealing without requiring the high dimensional accuracy previously needed, reducing manufacturing complexity and cost.
Solution Approach 2:
The design changes the sealing mechanism from relying on elastic deformation of a precision gasket to using geometric constraints and friction-based sealing with simpler components. This parameter change allows standard manufacturing tolerances to suffice, improving ease of manufacture while maintaining radial stability through the pressing plate's controlled constraint.
3Reliability
If external force is increased to maintain sealing, then sealing reliability is improved, but axial vibration of atomization piece is reduced
Solution Approach 1:
The force application is segmented into two independent functions: axial pressing force applied through the pressing plate for sealing, and radial constraint applied by peripheral sealing components. This segmentation allows the axial vibration energy to be preserved for atomization while sealing reliability is maintained through the distributed radial constraints.
Solution Approach 2:
The pressing force is applied locally at the periphery through the pressing plate and sealing components, rather than uniformly across the entire atomization piece. This localized force application maintains sealing at the critical interface while minimizing interference with the central atomization area's vibration characteristics.
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 module achieves stable and high atomization rates, with the ability to quantitatively atomize 5 μL-60 μL of spray in 1 s-3 s and maintain a high percentage of droplets with an aerodynamic particle size of less than 5.8 μm.
Implementation Method 1
the annular brake is piezoelectric ceramic... the microporous membrane is attached to the side surface of the annular brake... atomize the drug to achieve drug delivery
Implementation Method 2
the annular brake is piezoelectric ceramic, the piezoelectric constant of the piezoelectric ceramic is 200-800 pC/N
Data Source
AI summary
A metered-dose atomization module, an atomizer, a spray assembly and the use thereof. The metered-dose atomization module includes: a spray head in which an atomization cavity has a step surface; an atomization piece, including an annular brake and a microporous membrane attached to a side surface of the annular brake; rubber rings, including a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring being annular and arranged on two sides of the atomization piece respectively; and a pressing plate, the pressing plate being annular and fixed to the spray head, and being adapted to cooperate with the step surface to install the atomization piece and the rubber rings in the atomization cavity.