Filling-Element Assembly Segmentation for Contamination Control
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Solution Overview
Problem
Existing filling-element assemblies face challenges in switching between open-jet and pressurized filling methods without structural alterations, and they often contaminate the return-gas channel with microorganisms.
Innovation Solution
A filling-element assembly with a dual housing segment system that moves between raised and lowered positions, sealing the gas paths and return-gas channel to prevent contamination, using a housing wall segment that surrounds the valve housing in a gas-tight manner and incorporates seals to ensure a tight seal around the discharge opening and container mouth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single fixed housing structure is used for the filling element, then the structural complexity is reduced and manufacturing is easier, but the ability to switch between open-jet and pressurized filling methods is limited
Solution Approach 1:
The housing is divided into a first housing segment and a second housing segment that can move relative to each other along the filling element axis. This segmentation allows the filling element to adapt between open-jet and pressurized filling methods without requiring complete structural redesign, thereby improving versatility while maintaining manageable complexity through modular design.
Solution Approach 2:
The second housing segment is designed to be movable rather than fixed, allowing dynamic adjustment between raised and lowered positions. This dynamic capability enables the filling element to switch between different filling methods (open-jet and pressurized) by changing the relative position of the housing segments, thus improving adaptability without permanent structural modifications.
2Reliability
If the return-gas channel is exposed to the environment during filling operations, then gas exchange is simplified, but contamination by microorganisms increases
Solution Approach 1:
The housing segmentation creates distinct sealed zones. The first housing segment remains stationary and can maintain a sealed environment for the return-gas channel, while the second segment moves to provide sealing during different filling operations. This segmentation allows hygiene protection without requiring complete redesign of the gas path system.
Solution Approach 2:
The movable second housing segment acts as an intermediary sealing element between the return-gas channel and the external environment. During pressurized filling, this segment moves into position to seal the gas paths, preventing microorganism contamination while still allowing necessary gas exchange through controlled mechanisms.
3Reliability
If the second housing segment is moved to seal gas paths during pressure filling, then contamination is prevented, but the mechanism complexity increases
Solution Approach 1:
By dividing the housing into two separable segments, the sealing function is isolated to the interface between segments. The movable second segment provides sealing at this interface when in the raised position, preventing contamination without requiring complex sealing mechanisms throughout the entire housing structure.
Solution Approach 2:
The movable second housing segment serves multiple functions: it provides sealing during pressurized filling, allows gas path closure, and maintains structural integrity. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in overall mechanism complexity despite the added sealing capability.
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 seamless switching between ambient and non-ambient pressure filling methods while reducing the risk of germ propagation and contamination in the return-gas channel, maintaining hygiene and preventing product leakage.
Implementation Method 1
the second filling-element housing segment forms the discharge opening and has at least one seal, wherein the seal forms a tight seal around the discharge opening of the valve housing at least in the raised position
Implementation Method 2
a housing wall segment is provided between the first and second filling-element housing segments, which housing wall segment surrounds the valve housing in a gas-tight manner
Implementation Method 3
a second filling-element housing segment that can be moved in relation to the first filling-element housing segment along a filling element axis between a raised position and a lowered position
Implementation Method 4
the at least one return-gas channel remains along the filling element axis, and is preferably configured so as to be extensible in the longitudinal direction
Data Source
AI summary
A filling-element assembly for both pressurized and open-jet filling of containers includes a filling element having a filling-element housing, a liquid valve, a return-gas channel, and a seal. The housing has a fixed first segment, a vertically movable second segment, and an extendable segment between them to surrounds the valve housing in a fluid-tight manner. A return-gas channel extends along the filling-element axis between the valve housing and the filling-element housing. In a raised position of the second segment, the seal contacts the valve housing along a circumferential contact area and seals the filling-element discharge opening thereby forming a fluid-tight closure for the return-gas channel.