Microparticle Separation Nozzle Layout for Easier Vibration Coupling
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Solution Overview
Problem
The existing microparticle separating devices face complications due to the coaxial arrangement of the sample fluid introduction tube and vibration portion, leading to a complex fluid-sealing structure and difficulty in replacing components.
Innovation Solution
The device separates the sample fluid introduction portion and vibration application unit, allowing vibration to be applied to the sheath fluid from a direction different from the sample fluid introduction, with a reflection portion aligning wave propagation with the sample fluid direction, and includes a discharge portion to remove bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the sample fluid introduction tube and vibration portion are coaxially arranged, then the wave transmission direction can be aligned with the sample fluid introduction direction, but the fluid-sealing structure becomes complicated and component replacement becomes difficult
Solution Approach 1:
The device is divided into separate functional modules: the vibration application unit with annular vibration portion is separated from the sample fluid introduction tube. The annular vibration portion surrounds the sample fluid introduction tube without being coaxially connected, allowing independent positioning and simplifying the fluid-sealing structure while maintaining proper wave transmission alignment.
2Manufacturing precision
If the sample fluid introduction tube and vibration portion are coaxially arranged, then the wave transmission direction can be aligned with the sample fluid introduction direction, but component replacement becomes difficult
Solution Approach 1:
The vibration application unit is designed as a separate replaceable module that surrounds the sample fluid introduction tube. This modular design allows the vibration application unit to be easily removed and replaced without affecting the sample fluid introduction tube, facilitating maintenance and component replacement while maintaining proper alignment through the annular configuration.
3Device complexity
If the vibration application unit is separated from the sample fluid introduction tube, then the device structure is simplified and component replacement is facilitated, but the wave transmission alignment may be affected
Solution Approach 1:
The annular vibration portion is designed with an asymmetric configuration relative to the sample fluid introduction tube, creating a specific geometric relationship that naturally guides the wave transmission direction. The annular shape with controlled gap dimensions ensures proper alignment of wave transmission with the sample fluid flow direction while maintaining structural simplicity and ease of assembly.
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 configuration simplifies the device structure, facilitates easy replacement of components, and enhances the efficiency of droplet generation and electric charge application, while reducing bubble interference.
Implementation Method 1
vibration is applied to the sheath fluid by a vibration application unit. This vibration forms droplets at the discharge port of the nozzle
Implementation Method 2
a vibration application unit including an annular vibration portion that surrounds the sample fluid introduction tube has been proposed
Data Source
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AI summary
To improve the convenience of a microparticle separating device. A microparticle separating device includes a droplet generation unit, a sheath fluid introduction portion, a sample fluid introduction portion, and a vibration application unit. The droplet generation unit discharges a droplet containing a sample fluid and a sheath fluid from a discharge port. The sheath fluid introduction portion introduces the sheath fluid into the droplet generation unit. The sample fluid introduction portion is formed in a tubular shape inserted in the droplet generation unit and introduces the sample fluid in a direction toward the discharge port. The vibration application unit includes a vibration portion to be in contact with the sheath fluid and applies vibration to the sheath fluid from a direction different from an introduction direction of the sample fluid.