Fully automatic coffee machine with motorised multi-port valve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The operation of multi-way valves in hot drinks machines is complex and costly due to the need for separate detection devices for markings and initialization identifiers, which complicates the control of fluid flow between heating devices and brewing chambers.
Innovation Solution
A single detection device is used to interact with both markings and initialization identifiers, differentiating between them based on signal duration, allowing for a more cost-effective and robust design that adapts to changing conditions, enabling precise control of the multi-way valve in both directions of actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate detection devices are used for markings and initialization identifiers, then detection accuracy is improved, but device complexity and production cost increase
Solution Approach 1:
The patent combines the detection of markings and initialization identifiers into a single detection device. The detection device includes a sensor that reads both types of identifiers using the same hardware component, thereby reducing device complexity and production cost while maintaining detection accuracy through software-based differentiation of the two identifier types.
Solution Approach 2:
The single detection device is designed to perform multiple functions: detecting both markings and initialization identifiers. The detection device uses a universal sensor that can recognize different identifier types by analyzing signal characteristics such as signal duration, enabling one device to replace what would traditionally require separate specialized detectors for each identifier type.
2Ease of manufacture
If a single detection device is used for both markings and initialization identifiers, then production cost is reduced, but difficulty of detecting and measuring increases
Solution Approach 1:
The detection device differentiates between markings and initialization identifiers by analyzing local characteristics of the detected signals, specifically signal duration. The control unit evaluates the duration of each detected signal and applies different interpretation rules based on whether the signal duration corresponds to a marking or an initialization identifier, thereby simplifying the detection logic while maintaining accuracy.
Solution Approach 2:
The patent uses parameter changes in the signal characteristics to differentiate between identifier types. The detection device monitors signal duration as a key parameter, and the control unit distinguishes between markings and initialization identifiers based on predefined duration thresholds. This parameter-based differentiation simplifies the detection process compared to requiring separate hardware detectors for each identifier type.
3Speed
If the multi-way valve is controlled in both directions of actuation, then operation speed is improved, but device complexity increases
Solution Approach 1:
The multi-way valve is designed with dynamic bidirectional actuation capability, allowing the valve to be controlled in both clockwise and counter-clockwise directions. The control unit dynamically selects the optimal actuation direction based on the current valve position and the target position, enabling faster operation by choosing the shorter rotational path while managing control complexity through software-based direction selection.
Data Source
Figure 1
Figure 2
AI summary
A motor-driven multi-way valve for domestic hot beverage vending machines, comprising a heating device, a brewing chamber, a hot water outlet, and a control device, wherein the multi-way valve switches a fluid flow at least between the heating device on one side and the brewing chamber and the hot water outlet on the other, with a driven adjusting element, with a plurality of circumferentially distributed markings on the adjusting element, with a different initialization marking on the adjusting element, and with a detection unit cooperating with the markings and signaling detected markings to the control device, is further developed according to the invention in that the detection unit (33) cooperates with the initialization marking (16) and outputs a signal that can be evaluated in the control device.The invention also relates to a hot beverage vending machine equipped with the multi-way valve and a method for operating a hot beverage vending machine with such a multi-way valve.