Dialysis Bag Flow Equalisation via Segmented Welding
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Solution Overview
Problem
Existing container systems for dialysis fluids face issues with uneven filling and material stress due to the mobility of the inner bag within the outer container, leading to impermissible vibrations and high material stress during the filling of used liquid.
Innovation Solution
A container system with an inner and outer bag configuration, where the inner bag is connected to the outer bag through through openings and welding, ensuring even flow compensation and preventing the inner bag from folding, thus maintaining uniform filling and reducing material stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inner bag is made mobile within the outer container, then the system is easier to fill and empty, but uneven filling occurs and material stress increases
Solution Approach 1:
The inner bag is pre-connected to the outer bag through through-openings and welding before the filling process begins. This preliminary structural arrangement ensures that when liquid is filled into the outer bag, the inner bag is already positioned and secured to prevent folding and uneven distribution, thereby avoiding material stress while maintaining ease of operation.
2Stability of the object's composition
If the inner bag is connected through welding, then the inner bag is fixed and prevents folding, but flow equalization may be hindered
Solution Approach 1:
The connection between the inner bag and outer bag is segmented into multiple through-openings distributed at different locations. This segmentation allows the inner bag to be fixed in position through welding while still permitting liquid to flow through the through-openings, ensuring both stability and flow equalization during the filling process.
3Object-affected harmful factors
If the inner bag covers the inflow area, then the inner bag is protected, but used liquid cannot enter the outer container
Solution Approach 1:
The through-openings act as intermediaries between the inner bag and outer bag. Liquid can flow through these openings to reach the outer container without directly contacting the inner bag's protected areas, thus maintaining protection while enabling liquid transfer.
Data Source
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AI summary
The subject matter of the invention is a container system with an inner container for receiving ready-to-use liquid, particularly dialysing liquid, and an outer container for receiving used liquid, said outer container surrounding the inner container, the inner container having passage openings, which produce a flow connection of the fluid in the outer container.