Microfluidic Biochip Sealed Docking for Refrigerator Sample Detection
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Solution Overview
Problem
Existing microfluidic biochip systems in refrigerators face issues with sample introduction accuracy and reliability due to poor docking quality between the driving device and the biochip, leading to potential air and liquid leaks, which affect the detection process.
Innovation Solution
A microfluidic detection system with a sealed docking mechanism using a plug pin and sealing ring to establish a fluid-tight connection between the biochip and the driving device, ensuring reliable sample introduction and prolonged system life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a driving device is used to drive sample liquid into the microfluidic biochip, then sample introduction accuracy is improved, but docking quality between the driving device and biochip deteriorates, leading to air and liquid leaks
Solution Approach 1:
The plug pin is inserted into a receiving cavity within the driving device, creating a nested structure where the biochip's communication port is housed within the driving device assembly. This nesting ensures precise positioning and stable docking while maintaining the fluid-tight connection through the integrated sealing structure
Solution Approach 2:
The plug pin acts as an intermediary component that bridges the communication port of the biochip and the driving device. It provides both mechanical support for stable docking and fluid communication pathways, while the sealing ring attached to the plug pin ensures leak-proof connection between the two components
2Device complexity
If the communication port is directly connected to the driving device, then device complexity is reduced, but sealing effect deteriorates, causing leaks
Solution Approach 1:
The plug pin integrates multiple functions into a single component: it provides mechanical support for docking, creates fluid communication pathways through its internal flow channel, and ensures sealing through the attached sealing ring. This merging of functions maintains relatively simple device structure while achieving reliable sealing
Solution Approach 2:
The sealing ring, typically made of flexible elastomeric material, is attached to the plug pin to create a compliant sealing interface. This flexible sealing element can deform to accommodate minor misalignments and surface irregularities, ensuring leak-proof connection without requiring complex rigid sealing structures
Data Source
AI summary
Provided are a microfluidic detection system for a refrigerator and the refrigerator. The microfluidic detection system comprises: a microfluidic biochip that has a sample inlet, a detection pool and a communication port, all of which communicate in sequence by means of a microfluidic channel; a sample liquid driving device in sealed communication with the communication port by means of a sealed docking mechanism; and a detection mechanism for detecting the detection cell to obtain preset detection parameters of a sample liquid. The communication port is fixedly provided with a plug pin having an internal flow channel in sealed communication with the communication port, the plug pin is inserted into and forms a fluid-tight connection with the sealed docking mechanism, and the sealed docking mechanism is in fluid-tight connection with the sample liquid driving device, so that the sample liquid driving device is in sealed communication with the communication port.