Microfluidic Biochip Sealed Docking Mechanism to Reduce Leakage
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Solution Overview
Problem
Existing microfluidic detection systems face challenges with accurate sample introduction and sealing issues between the biochip and the sample liquid driving device, leading to potential air or liquid leakage, which affects the reliability and service life of the system.
Innovation Solution
A microfluidic detection system with a sealed docking mechanism using a plug pin with a smooth hemispherical surface and a sealing ring, combined with an elastic pressing mechanism, ensures a fluid-tight connection between the microfluidic biochip and the sample liquid driving device, preventing leakage and maintaining a reliable seal over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detachable connection is used between the microfluidic biochip and the sample liquid driving device, then the ease of operation and maintenance is improved, but the sealing reliability deteriorates due to potential air or liquid leakage
Solution Approach 1:
The plug pin is inserted into a receiving cavity within the sample liquid driving device, creating a nested structure where the biochip connects to the driving device. This nesting provides both easy detachment for maintenance and reliable sealing through the integrated plug pin-receiving cavity interface
Solution Approach 2:
The plug pin acts as an intermediary component that bridges the biochip and the sample liquid driving device. It provides a dedicated fluid-tight connection path through its internal flow channel, ensuring sealing reliability while maintaining the detachable nature of the overall connection
2Reliability
If a complex sealing structure is used to prevent leakage, then the sealing reliability is improved, but the device complexity increases
Solution Approach 1:
The plug pin combines multiple functions into a single component: it serves as both the mechanical connector for attachment and the fluid-tight seal for preventing leakage. The receiving cavity integrates the sealing interface and the fluid pathway, eliminating the need for separate sealing elements and reducing overall device complexity
Data Source
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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 communication port and a detection cell, wherein the sample inlet, the detection cell and the communication port communicate in sequence by means of a microfluidic channel; a sample liquid driving device, which is in sealed communication with the communication port by means of a sealed docking mechanism, and which is used to impel sample liquid in contact with the sample inlet to enter the microfluidic channel and flow to the detection cell by means of the microfluidic channel; and a detection mechanism, which is used for detecting the detection cell so as to obtain preset detection parameters of the sample liquid. The communication port of the microfluidic biochip is fixedly provided with a plug pin protruding and extending outward. An internal flow channel of the plug pin is in sealed communication with the communication port, and the plug pin is inserted into the inside of the sealed docking mechanism 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, and the sealing effect is good.