Bag-Shaped Container for Bubble-Free Liquid Circuit Filling
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Solution Overview
Problem
Conventional methods for filling pump-operated, hollow line-supported liquid circuits face challenges in preventing gas bubbles during high flow speeds, especially when connecting two liquid-filled tube ends without forming gas bubbles.
Innovation Solution
A bag-shaped container with a flexible wall and a first filter insert that includes a tubular fluid line section, allowing for fluidic connection between the filter volume and the bag volume, which also serves as a connection piece for the hollow channel sections, enabling degassing and fluid-tight connection without gas bubbles by using materials with different elasticities and a two-stage filter effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filling methods are used for pump-operated liquid circuits, then filling can be performed, but gas bubbles are formed during the process
Solution Approach 1:
The device segments the filling process into distinct phases: initial filling phase where the bag fills independently, and connection phase where hollow channel sections are connected within the liquid-filled bag. This segmentation allows high-speed filling without gas bubbles because the connection operation occurs in a controlled liquid environment rather than during the filling process itself
Solution Approach 2:
The bag-shaped container acts as an intermediary medium that receives liquid first, then serves as the environment for connecting hollow channel sections. By using the bag as an intermediate filling stage, the system enables rapid filling while maintaining gas bubble-free conditions during the subsequent connection phase
2Reliability
If two hollow channel sections are connected within the bag, then fluid-tight connection is achieved, but the connection process becomes complex
Solution Approach 1:
The flexible bag wall serves a dual function: it contains the liquid and simultaneously acts as a transparent observation window. This self-service feature of the bag wall allows visual monitoring of the connection process between hollow channel sections without requiring additional sensors or detection devices, simplifying the overall system while ensuring reliable fluid-tight connections
3Ease of operation
If the bag wall is made flexible and light-transparent, then visual monitoring of connection is enabled, but the structural strength is reduced
Solution Approach 1:
The invention changes the optical parameter (transparency) and mechanical parameter (flexibility) of the bag wall material to enable visual monitoring. By selecting materials with appropriate parameter combinations - sufficiently transparent for observation and sufficiently flexible for manipulation while maintaining adequate strength through proper material selection and wall thickness design
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
Enables quick filling of pump-operated, hollow line-supported liquid circuits without gas bubbles, ensuring a fluid-tight connection between channel ends and effective degassing at high flow speeds, particularly effective for circuits with integrated oxygenators.
Implementation Method 1
During the flow-related passage of the liquid through the filter wall into the remaining bag volume, the filter wall separates potential gas fractions
Implementation Method 2
gas bubbles that may be enclosed in the liquid and therefore entrained thereby, particularly in the form of air bubbles, can escape through the tube ends within the bag as a result of buoyancy
Data Source
AI summary
The invention relates to a container in the form of a bag having a flexible bag wall at least in a region, in which a first and a second hollow channel section, pass through the bag wall in a fluid-tight manner, wherein the hollow channel sections respectively have an open channel end that is located within the container for connecting the open channel ends to one another in a separable and fluid-tight manner.