Dispense Head Gas Shut-Off Mechanism for Beverage Systems
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Solution Overview
Problem
Existing beverage dispensing systems face issues with complex and expensive dispense heads that leak CO2, are difficult to clean, and pose hygiene concerns due to contamination residues, leading to potential hazardous CO2 levels when disconnected.
Innovation Solution
A simplified dispense head design with fewer parts, featuring a spring-loaded gas shut-off element and a single sealing mechanism, which maintains the fluid channel closed in a disconnected state, preventing CO2 leakage and facilitating easy cleaning and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sophisticated connection means are integrated in the dispense head to maintain connection without leakage, then connection reliability is improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The dispense head is divided into functionally independent components: a simple connection means for mechanical attachment, a separate shut-off element for gas flow control, and a piston mechanism for actuation. This segmentation allows each component to perform its specific function efficiently without the complexity of integrated sophisticated connection means, while maintaining reliable connection and preventing leakage through the separate shut-off element.
Solution Approach 2:
The shut-off element is positioned and configured to close the fluid channel before the piston is actuated. This preliminary action ensures that the gas channel is already sealed when the dispense head is disconnected from the beverage container, preventing CO2 leakage without requiring complex connection means. The shut-off element is spring-loaded to automatically close the channel in advance of any potential leakage scenario.
2Reliability
If sophisticated connection means are integrated in the dispense head to maintain connection without leakage, then connection reliability is improved, but manufacturing cost increases
Solution Approach 1:
By segmenting the dispense head into simple, standardized components (connection means, shut-off element, piston), each part can be manufactured independently using conventional processes. This reduces manufacturing cost compared to producing a single complex integrated unit, while maintaining reliability through the dedicated shut-off element that prevents leakage.
Solution Approach 2:
The design accepts that the dispense head may be replaced rather than meticulously maintained. The simple construction with fewer parts makes it economical to manufacture as a disposable or replaceable component, reducing the need for expensive materials and complex manufacturing processes while ensuring reliable operation during its service life.
3Adaptability or versatility
If the dispense head is disconnected from the beverage container, then keg replacement is enabled, but CO2 leakage occurs through the dispense head
Solution Approach 1:
The shut-off element is spring-loaded to automatically close the fluid channel before disconnection occurs. When the dispense head is removed from the beverage container, the spring force ensures the shut-off element is already in the closed position, sealing the gas channel and preventing CO2 leakage. This preliminary closing action happens automatically as part of the disconnection process.
Solution Approach 2:
The shut-off element applies a counter-action (closing the fluid channel) in advance to offset the harmful effect (CO2 leakage) that would otherwise occur during disconnection. The spring-loaded mechanism continuously exerts force to keep the shut-off element engaged with the sealing surface, creating a preliminary barrier against gas leakage before the disconnection event actually occurs.
4Reliability
If the gas shut-off is integrated in the piston, then gas flow control is achieved, but residues and contaminants are deposited near the sealings causing hygiene issues
Solution Approach 1:
The shut-off element is extracted from the piston and positioned separately in the housing. This separation removes the gas flow control function from the piston assembly, eliminating the problem of residues and contaminants being deposited near the piston sealings. The shut-off element is located in a cleaner area of the housing where it can perform its sealing function without exposure to beverage residues.
Solution Approach 2:
The shut-off element acts as an intermediary component between the gas supply and the piston mechanism. It provides a dedicated sealing location that is isolated from the beverage contact areas, allowing gas flow control to be achieved without compromising the hygiene of the piston sealings. The shut-off element mediates the gas flow while keeping the piston area clean and free from contaminant deposition.
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
The solution ensures secure, leak-proof operation, reduces manufacturing and maintenance complexity, and enhances hygiene by eliminating residue deposition near sealings, while allowing easy disconnection and reconnection without CO2 leakage.
Implementation Method 1
The gas shut-off element may comprise a spring element for maintaining the fluid channel closed for gas flowing in a disconnected state of the dispense head, the spring element having a predetermined spring force.
Data Source
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AI summary
The present invention relates to a dispense head (5) adapted to be coupled to a beverage container above an extractor tube arranged in the beverage container in a dispensing system. The dispense head comprises a housing (13) having a first end (14) and a second end (15), a hollow piston (16) arranged axially displaceably within the housing (13), the piston (16) being connected to a handle (9) so that upon activation of the handle (9), the piston (16) will be displaced axially towards and beyond a second end (15) of the housing (13), and a gas inlet (10) arranged in the housing (13), which via a fluid channel is in connection with a space extending along the piston (16) and between the housing (13) and the piston (16). Furthermore, a gas shut-off element (18) is arranged in the fluid channel (17).