Beverage Chamber Pressure Profiling for Consistent Coffee Extraction
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Solution Overview
Problem
Existing beverage preparation methods are inconsistent due to dependence on cartridge material, design, and pressure, leading to variable infusion/brewing times and quality, especially for materials like ground coffee, which cannot withstand high extraction pressures.
Innovation Solution
A process involving controlled pressure profiles in a beverage preparation chamber, where water flow is interrupted and resumed to maintain a constant or increasing pressure, allowing for improved extraction without relying on cartridge material or design, using pressures between 3 to 20 bar, primarily 5 to 15 bar, for enhanced extraction of coffee and herbal remedies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high extraction pressure is used to improve extraction efficiency, then extraction quality is improved, but ground coffee cannot withstand the pressure and degradation occurs
Solution Approach 1:
The patent applies preliminary action by pre-wetting the coffee grounds with hot water before applying high extraction pressure. This pre-wetting step (first water flow phase) prepares the coffee material to better withstand subsequent pressure, allowing efficient extraction without degradation of the coffee or cartridge
2Stability of the object's composition
If water flow is continuous to maintain extraction pressure, then extraction consistency is improved, but pressure control precision deteriorates
Solution Approach 1:
The patent implements periodic action by dividing the water flow into distinct phases: a first phase for pre-wetting at lower pressure, and a second phase for extraction at higher pressure. This periodic control allows precise pressure management in each phase while maintaining overall extraction consistency, resolving the contradiction between continuous flow and pressure control precision
3Loss of time
If extraction pressure is increased to reduce brewing time, then productivity is improved, but beverage quality deteriorates due to incomplete extraction
Solution Approach 1:
By pre-wetting the coffee grounds in a first phase before applying high extraction pressure, the patent enables faster subsequent extraction. The pre-wetted coffee absorbs water more efficiently during the high-pressure phase, reducing total brewing time while ensuring complete extraction and maintaining beverage quality
4Strength
If cartridge material is made more rigid to withstand high pressure, then pressure resistance is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent reduces the need for highly rigid cartridge materials by pre-wetting the coffee grounds before pressure application. This preliminary action prepares the coffee to better distribute and withstand pressure, allowing the use of simpler, less complex cartridge materials while still achieving high-pressure extraction capability
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 method ensures a consistent and complete extraction process, resulting in higher quality beverages with improved extraction of coffee fibers and compounds, reducing the importance of flow rate and allowing traditional cartridges to be used with standard pumps, while maintaining the quality of the beverage.
Implementation Method 1
the flow of water is interrupted before reaching a pressure sufficient to cause the perforation of the pod walls
Implementation Method 2
improved extraction of coffee fibers and compounds
Implementation Method 3
A process involving controlled pressure profiles in a beverage preparation chamber, where water flow is interrupted and resumed to maintain a constant or increasing pressure
Implementation Method 4
extraction of coffee fibers and compounds
Data Source
AI summary
A process of preparing a beverage from a beverage preparation chamber includes feeding water to the preparation chamber until a first pressure is reached, interrupting the flow of water to the preparation chamber, holding the preparation chamber in a closed condition for a first time interval, opening the outlet of the preparation chamber and delivering the thus prepared beverage.