Centrifugal Rotor Conduit Angled Outlet and Obstructive Features
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Solution Overview
Problem
Centrifugal rotor devices face issues with capillary-flow fronts forming along the edges of main siphon channels, which can rupture under centrifugal pressure, leading to inefficiencies in fluid delivery and mixing.
Innovation Solution
The design incorporates a conduit system with a coupling portion angled between the radially inward and perpendicular directions, and includes obstructive features in secondary channels to impede fluid flow, ensuring precise delivery and mixing of fluids within the rotor device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conduit outlet is positioned at the radially outward edge of the side wall, then fluid delivery is simplified, but capillary-flow fronts form and can rupture under centrifugal pressure
Solution Approach 1:
The invention extracts the problematic radially outward edge position from the conduit outlet design. By removing the outlet from the radially outward edge and repositioning it at an angle between 0-180 degrees from the radially inward direction, the harmful capillary-flow front formation is eliminated while maintaining functional fluid delivery capability.
Solution Approach 2:
Instead of positioning the conduit outlet at the traditional radially outward edge, the invention inverts the approach by positioning it relative to the radially inward direction. This inversion of the reference direction fundamentally changes the flow dynamics and prevents capillary-flow front rupture.
2Measurement precision
If the conduit coupling portion is positioned at various angles, then fluid delivery precision is improved, but device complexity increases
Solution Approach 1:
The invention applies local quality by specifying the coupling portion angle in the local context of the first chamber geometry. The angle is defined relative to the radially inward direction of the specific chamber, allowing precision fluid delivery tailored to each chamber's local configuration without requiring complex global device redesign.
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 enhances the precision and reliability of fluid delivery and mixing in centrifugal rotor devices, preventing fluid rupture and ensuring consistent operation, thereby improving analytical procedures for various biological and chemical samples.
Implementation Method 1
bonding the first substrate and the second substrate by applying high frequency sounds to the energy director to form a weld around the channel
Implementation Method 2
applying high frequency sounds to the energy director to form a weld around the channel
Implementation Method 3
centrifugal rotor device that includes a rim defining a radially inward direction and a radially outward direction
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A centrifugal rotor device includes a first chamber configured to hold a fluid, and a second chamber configured to receive the fluid from the first chamber. The centrifugal rotor device also includes a conduit coupled to the first chamber at a conduit inlet and coupled to the second chamber at a conduit outlet, the conduit configured to permit movement of the fluid from the first chamber to the second chamber. The conduit includes a first channel and a second channel formed adjacent to the first channel. The second channel is in fluid communication with the first channel and has a dimension smaller than the smallest dimension of the first channel. The conduit also includes one or more obstructive features present in the second channel configured to impede movement of the fluid in the second channel.