Aerosol Generator Vortex Separation for Precise Droplet Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing aerosol generators lack the ability to precisely adjust and control droplet size, particularly for transnasal inhalation therapy, and often result in undesirably large droplets being supplied to the outlet channel.
Innovation Solution
The aerosol generator employs off-center feeding of carrier gas into the nebulization chamber with a tangential component relative to its rotation axis, combined with a baffle plate and adjustable inflow parameters, to generate a controlled swirl and separate large droplets using centrifugal force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a baffle plate is arranged in the aerosol dome to separate large droplets, then large droplets are removed from the aerosol, but the device complexity increases and the droplet size control precision is insufficient
Solution Approach 1:
The patent replaces the mechanical baffle plate separation system with a controlled vortex flow system. By introducing carrier gas through tangential inlet channels, a rotational flow field is created that uses centrifugal force to separate droplets by size. This substitutes complex mechanical structures with a fluid dynamic approach, reducing device complexity while improving droplet size control precision through adjustable flow parameters.
Solution Approach 2:
The patent employs parameter changes by controlling the carrier gas flow rate, inlet angle, and pressure to adjust the vortex intensity. By varying these parameters, the droplet separation efficiency and final aerosol droplet size can be precisely controlled without changing the physical structure of the device, thus maintaining simplicity while achieving high precision droplet size control.
2Productivity
If the carrier gas flow rate is increased to improve aerosol generation efficiency, then productivity increases, but the droplet size control becomes less precise
Solution Approach 1:
The patent implements feedback control by monitoring the aerosol output characteristics and adjusting the carrier gas flow rate and inlet parameters accordingly. The system can detect changes in droplet size distribution and modify the vortex intensity through flow rate adjustment, maintaining optimal droplet size control even at high productivity levels. This closed-loop control allows simultaneous optimization of both efficiency and precision.
3Adaptability or versatility
If static fixtures are used within the nebulization chamber to generate swirl, then the device structure is simplified, but the droplet size adjustability is limited
Solution Approach 1:
The patent transitions from static fixtures to a dynamic vortex generation system. The carrier gas inlet channels are designed with adjustable angles and positions that can be modified during operation. By dynamically changing the inlet parameters, the vortex intensity and droplet separation characteristics can be adjusted, providing high adaptability for different droplet size requirements without adding complex mechanical adjustment mechanisms.
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 design allows for precise adjustment of droplet size, ensuring only smaller aerosols reach the outlet, enhancing the effectiveness of transnasal inhalation therapy by minimizing large droplet supply.
Implementation Method 1
the carrier gas flowing into this chamber, in particular the patient's breathing air, is swirled around the cylinder axis by a guide vane arrangement in the nebulization chamber
Implementation Method 2
Due to centrifugal force, the comparatively large and correspondingly heavy aerosol droplets are pressed against the inside of these guide vanes
Implementation Method 3
a baffle plate is arranged in the atomization chamber opposite the active liquid container. The largest liquid droplets in particular are deposited on this plate so that they can drip back from the baffle plate into the active liquid container
Data Source
Figure 1~2
Figure 3~4
AI summary
An aerosol generator (1) with an active liquid container (4) and an associated nebulization chamber (2), which is connected to an inlet channel (10) for supplying carrier gas and to an outlet channel (12) for removing carrier gas mixed with aerosol obtained from the active liquid, is intended to enable particularly precise control of the droplet size of the aerosols contained in the delivered carrier gas and thus its use specifically in the context of transnasal inhalation therapy. According to the invention, the nebulization chamber (2) has a substantially rotationally symmetrical boundary wall (8), wherein the inlet channel (10) is positioned and oriented in the region of its opening into the nebulizer chamber (2) such that its longitudinal axis is offset relative to the axis of symmetry of the nebulization chamber (2) in the region of the opening and does not intersect the axis of symmetry.