Dual-Rotor Ceramic Valve for Compact Hot Drink Water Distribution
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Solution Overview
Problem
Hot drinks machines require multiple brewing and mixing units, leading to space constraints and increased costs due to the need for numerous individual dosing and shut-off valves, which also limits the number of drink types that can be efficiently supplied.
Innovation Solution
A compact shut-off and distribution valve with ceramic disks and a dual rotor design, featuring a connecting line to link outlets between rotors, allowing for controlled supply of hot water to multiple units while being resistant to calcification and dirt, and incorporating a safety valve for pressure relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a central valve arrangement is used instead of multiple individual dosing and shut-off valves, then the number of required valves and electrical leads is reduced, but the valve must supply hot water to a large number of brewing and mixing units which increases complexity
Solution Approach 1:
The valve is divided into two separate rotors (first rotor and second rotor), each capable of independently controlling flow to different outlets. This segmentation allows the single valve to serve multiple brewing and mixing units while maintaining manageable complexity through modular control structures.
Solution Approach 2:
The central valve arrangement is designed to supply hot water to a large number of different brewing and mixing units through its multiple outlets. The valve body with multiple outlets and the ability of rotors to direct flow to various destinations enables one valve to perform the function of multiple individual valves.
2Reliability
If ceramic disks are used in direct contact with the stator, then the valve becomes insensitive to calcification and dirt at high temperatures, but the manufacturing precision required for the one-piece stator increases
Solution Approach 1:
The valve employs ceramic disks in direct contact with the stator, combining the heat resistance and calcification resistance of ceramic materials with the structural integrity of the stator. This material selection enhances reliability in high-temperature environments while the one-piece stator design simplifies manufacturing by eliminating assembly steps.
3Volume of moving object
If the valve design is made compact, then space is saved in the hot drinks machine, but the integration of additional features like compressed air input and safety valve becomes more difficult
Solution Approach 1:
The compressed air input and safety valve features are integrated into the compact valve structure by nesting additional functional elements within the existing rotor and valve body architecture. The connecting line between rotors and the outlet structure accommodate multiple functions without significantly increasing the external dimensions of the valve.
Solution Approach 2:
Multiple functions are merged into the single valve assembly: hot water distribution, compressed air input for drying and flushing, and safety valve activation. The outlet structure serves as a common interface for both hot water and compressed air pathways, consolidating multiple functions into a compact integrated design.
4Measurement precision
If compressed air is supplied to blow free the supply lines, then dosing accuracy and temperature constancy are improved, but the device complexity increases due to additional inputs and control mechanisms
Solution Approach 1:
The compressed air system provides self-service functions by automatically drying coffee grounds and flushing supply lines after each beverage preparation. The integrated compressed air input and outlet structure enable the system to maintain itself without requiring separate manual intervention for drying and flushing operations.
Data Source
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AI summary
The valve has a set of outlets (32a) arranged, over which the hot water is supplied depending on conditions of rotors (4, 10). The rotor (10) is driven by a separate motor independent of the rotor (4), where an outlet of the rotor (4) is connected with an inlet of the rotor (10) by a connecting line (28) in such a manner that the hot water is supplied to the inlet of the rotor (10) in a connecting condition of the rotor (4). One of outputs assigned to the rotor (10) is fed depending on the respective conditions of the rotor (10).