Preparation Chamber Pressure Profiling for Consistent Beverage Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing beverage preparation methods are inconsistent due to variable infusion/brewing times influenced by cartridge material, design, and pressure, leading to unpredictable beverage quality, and struggle with high granulometry materials like ground coffee, which cannot withstand high extraction pressures.
Innovation Solution
A process involving controlled pressure profiles, where the preparation chamber is held at a constant pressure of at least 3 bar for 1-60 seconds, with interrupted and resumed water flow to maintain pressure, allowing for stepwise pressure increases, independent of the material's nature, to ensure consistent extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high extraction pressure is applied to ground coffee, then extraction efficiency is improved, but the cartridge material and structure must be redesigned to withstand high pressure
Solution Approach 1:
The patent applies preliminary action by pre-wetting the ground coffee with pressurized hot water before the actual extraction step. This preparation phase (pressurization step) softens the coffee grounds and opens the cartridge outlet, enabling subsequent efficient extraction at lower pressures. The water flow is intentionally interrupted before reaching extraction pressure to allow this preparatory action to complete first.
Solution Approach 2:
The extraction process is segmented into distinct phases: a pressurization step with interrupted water flow to prepare the coffee grounds and open the outlet, followed by an extraction step where water flow resumes. This segmentation allows each phase to be optimized independently - the pressurization phase prepares the material without requiring full extraction pressure, thereby reducing the mechanical demands on the cartridge.
2Loss of time
If water flow is continuous during pressurization, then extraction time is reduced, but beverage quality becomes inconsistent due to variable infusion times
Solution Approach 1:
The patent implements periodic action by interrupting the water flow during the pressurization phase, then resuming it for the extraction phase. This periodic control of water flow allows precise timing and separation of preparation and extraction functions. The interruption creates a defined transition point that ensures consistent preparation conditions before extraction begins, leading to more reliable and repeatable beverage quality across multiple cycles.
3Stress or pressure
If the cartridge outlet is kept closed during pressurization, then pressure build-up is improved for opening, but water cannot penetrate the coffee grounds effectively
Solution Approach 1:
The closed outlet during pressurization serves as a preliminary action to build sufficient pressure for two purposes: opening the cartridge outlet and softening the coffee grounds. Once this preparatory pressure is achieved and the outlet opens, water flow is resumed to enable effective penetration and extraction. The preliminary pressurization ensures that when extraction begins, both the pathway is open and the material is prepared for efficient water penetration.
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 results in a reliable and consistent beverage quality by allowing thorough wetting and penetration of ingredients, improving extraction efficiency and organoleptic characteristics, and can be used with standard equipment and cartridges without re-designing them.
Implementation Method 1
a first amount of pressurized hot water is fed to the preparation chamber and the flow of water is interrupted before reaching a pressure sufficient to cause the opening of the outlet
Implementation Method 2
The remaining material is disposed after the infusion or brewing step
Implementation Method 3
soluble products for the preparation of hot beverages such as coffee, tea, herbal remedies
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
A process of preparing a beverage from a beverage preparation chamber comprises the steps of feeding water to the preparation chamber (2) until a first pressure (P1) of at least 3 bar is reached, interrupting the flow of water to the preparation chamber, holding said preparation chamber (2) in a closed condition for a first time interval (ti), opening said outlet (3) of the preparation chamber (2) and delivering the thus prepared beverage.