A coffee machine and a method of operating a coffee machine
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Solution Overview
Problem
Fully automatic coffee machines require user expertise to optimize brewing settings for different coffee beans, as existing methods for detecting bean types are expensive and difficult to calibrate, leading to suboptimal espresso production.
Innovation Solution
A coffee machine with a sensor arrangement and controller that performs test brewing cycles to measure operating characteristics, allowing the derivation of suitable settings for optimal brewing, without direct analysis of coffee grinds or beans, and adjusts settings automatically or provides user input for manual adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infra-red spectroscopy is used to detect bean type, then detection accuracy is improved, but cost and calibration difficulty increase
Solution Approach 1:
The patent replaces complex optical spectroscopy systems with a mechanical test brewing process that uses standard sensors (pressure, temperature, flow) to characterize coffee beans. Instead of using infra-red spectroscopy to directly identify bean type, the system performs actual brewing cycles and measures operational parameters, substituting a complex detection system with a functional testing approach using readily available sensors.
Solution Approach 2:
The patent introduces water flow and brewing parameters as intermediary measurements to indirectly characterize bean type. Rather than directly analyzing bean properties with complex spectroscopy, the system uses water flow rate, pressure, and temperature during brewing as intermediary variables that reflect bean characteristics, enabling bean type identification through standard industrial sensors.
2Adaptability or versatility
If manual experimentation by baristas is used to optimize settings, then flexibility is improved, but time consumption and expertise requirement increase
Solution Approach 1:
The patent implements self-service by enabling the coffee machine to automatically determine optimal brewing settings for different bean types without requiring barista expertise. The system performs test brewing cycles, analyzes operational characteristics, and autonomously identifies bean type and optimizes parameters, replacing manual barista experimentation with automated self-determination.
Solution Approach 2:
The patent applies preliminary action by performing test brewing cycles before actual coffee preparation to pre-determine optimal settings. The system conducts preliminary characterization of beans through controlled test brews, analyzes the results, and stores optimal parameters for subsequent brewing operations, eliminating the need for real-time manual adjustment during service.
3Measurement precision
If test brewing cycles are performed with normal water and coffee amounts, then measurement accuracy is improved, but waste increases
Solution Approach 1:
The patent applies partial action by using reduced quantities of water and coffee grounds during test brewing cycles compared to normal brewing operations. The system performs characterization tests with partial amounts sufficient to obtain meaningful operational data while minimizing waste, allowing accurate measurement of pressure, temperature, and flow characteristics without requiring full brewing volumes.
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 the determination of optimal brewing settings for different coffee beans with minimal user expertise, ensuring consistent espresso quality by measuring and mapping operating characteristics to suitable settings, reducing waste and optimizing machine performance.
Implementation Method 1
a water heater for heating water from the water supply
Implementation Method 2
a pump for pumping the heated water
Implementation Method 3
pressure sensors, force sensors, temperature sensors, flow sensors, timing measurements performed by a processor, current measurements, voltage measurements
Implementation Method 4
pressure sensors, force sensors, temperature sensors, flow sensors, timing measurements performed by a processor, current measurements, voltage measurements
Implementation Method 5
pressure sensors, force sensors, temperature sensors, flow sensors, timing measurements performed by a processor, current measurements, voltage measurements
Data Source
AI summary
A coffee machine has a test function, by which a user can instruct suitable operating settings to be determined, e.g. for a new coffee bean type to be used. A series of one or more test brewing cycles is then carried out to measure operating characteristics of the coffee machine, and thereby derive a set of suitable operating settings, for example for those new coffee beans.