Self-Guiding Float Valve for Draught Beer Dispensing
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Solution Overview
Problem
Existing flow control devices for pressurized liquid systems, such as those used in draught beer dispensing, suffer from foam wastage, hygiene issues due to bacterial accumulation in guide pins and components, and complex cleaning processes, especially when foam enters the supply lines and requires manual handling to reset.
Innovation Solution
A flow control device with a float valve that uses protrusions on its float section to guide itself into the correct position within the chamber, eliminating the need for guide pins and other components that can harbor bacteria, and featuring a vent valve mounted outside the liquid path to reduce contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide pins and through-bores are used to guide the float valve, then the float valve operation is reliable and guided correctly, but bacteria accumulate in these components compromising hygiene and making cleaning more complicated
Solution Approach 1:
The patent removes guide pins, through-bores, and other guiding components from the chamber interior. Instead, the float valve is guided by its own protrusions engaging with the chamber wall's inner surface, eliminating the harmful components that harbor bacteria while maintaining reliable float valve operation.
Solution Approach 2:
The float valve guides itself into the correct position using protrusions that are integral to its structure. This self-guiding mechanism eliminates the need for separate guide pins and through-bores, reducing components that could accumulate bacteria while ensuring the float valve operates reliably in the correct position.
2Ease of operation
If multiple components with engagement pieces are used within the chamber, then the float valve is properly guided and positioned, but the number of areas where bacteria can accumulate increases and cleaning becomes more difficult
Solution Approach 1:
The guiding function is merged into the float valve structure itself through integral protrusions. This eliminates the need for separate guide pins, through-bores, and other engagement pieces, reducing the total number of components while maintaining proper float valve positioning and simplifying cleaning.
Solution Approach 2:
The patent extracts and removes unnecessary guiding components from the chamber interior. The float valve is guided solely by its own protrusions engaging with the chamber wall, eliminating multiple separate components and their engagement pieces, thereby reducing device complexity and improving ease of cleaning.
3Ease of manufacture
If the vent valve is mounted inside the liquid path, then it is easy to install, but it increases contamination risks and complicates cleaning
Solution Approach 1:
The vent valve is extracted from the liquid path and mounted on the exterior of the chamber. This separation eliminates the contamination risk associated with having the vent valve inside the liquid path while maintaining ease of installation through external mounting provisions.
4Productivity
If foam enters the supply lines, then the system continues to operate, but foam must be drained manually causing wastage and service delays
Solution Approach 1:
The float valve, by closing the chamber outlet when foam is detected, converts the harmful effect of foam formation into a beneficial automatic shutdown mechanism. This prevents foam from entering the supply lines, eliminating the need for manual draining and associated wastage, while maintaining system operation continuity by automatically resuming when the chamber is properly filled.
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
This design enhances hygiene by reducing bacterial accumulation areas, simplifies cleaning, and minimizes foam wastage by effectively preventing foam from entering the supply lines, while allowing for easy installation and maintenance without tools.
Implementation Method 1
When the chamber is full of beer, the float valve floats in the liquid, thereby leaving the beer valve open and supplying beer to the taps. However, when foam or froth begins to develop in the chamber, the float valve is too heavy and will not float on the froth.
Implementation Method 2
the float section of the float valve comprises a plurality of protrusions, at least some of which engage the inner surface of the wall of the chamber so as to locate the float valve substantially in line with the chamber outlet
Data Source
Figure 1
Figure 2
Figure 3(a)~3(c)
AI summary
A flow control device (1) for use in a supply line between a pressurised liquid container and a dispenser for the liquid, the flow control device (1) comprising a chamber (200) having an inlet (114) for receiving liquid from the container; a base section (102) comprising a chamber outlet (122) for supplying liquid to the dispenser; a vent valve (110) for venting gas from the chamber (200); a float valve (106) comprising a float section (142) and a seat section (146) and movable to and from an open position wherein the chamber outlet (122) is open to liquid flow and a closed position wherein the chamber outlet (122) is closed to liquid flow; and a float valve opening mechanism (120) Wherein the float section (142) of the float valve (106) comprises a plurality of protrusions (143), at least some of which engage the inside (138) of the chamber (200) so as to locate the float valve (106) substantially in line with the chamber outlet (122). In this way, the float valve can guide itself into the correct position without the need for additional guiding components.