Single Syringe Liquid Medicine Filling Device with Dual Flow Path Switching
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Solution Overview
Problem
Existing liquid medicine filling devices require two syringes to fill the liquid medicine storage unit and remove air, resulting in a larger device size.
Innovation Solution
A liquid medicine filling device with a syringe, a first flow path switching unit, and a second flow path switching unit, which allows for filling and air removal using a single syringe by switching between different flow paths, reducing the device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two syringes are used for filling liquid medicine and removing air, then the filling and air removal functions are achieved, but the device size becomes large
Solution Approach 1:
The patent combines two separate syringes into a single syringe that performs both filling and air removal functions. The single syringe is configured to draw liquid medicine from the container and simultaneously remove air bubbles from the liquid medicine storage unit, thereby reducing device size while maintaining functional reliability
Solution Approach 2:
The single syringe is designed with multi-functionality to perform both filling operations and air removal operations. By making the syringe universal for both purposes, the patent eliminates the need for separate syringes, thus reducing the overall device volume while ensuring both functions are reliably achieved
Data Source
AI summary
A liquid medicine filling device includes a container mounting unit, a liquid delivery flow conduit, a ventilation flow conduit, a syringe, a connection flow conduit, a first flow path switching unit, and a second flow path switching unit. The first flow path switching unit may switch between a flow path for filling through which the syringe communicates with a liquid medicine container via the ventilation flow conduit and a flow path for air removal through which the syringe communicates with the connection flow conduit via the ventilation flow conduit. The second flow path switching unit may switch between a flow path for filling through which the liquid medicine container communicates with the liquid medicine storage unit via the liquid delivery flow conduit and a flow path for air removal through which the liquid medicine storage unit communicates with the connection flow conduit via the liquid delivery flow conduit.