Beverage Capsule Clamp Assembly for High-Pressure Espresso Extraction
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Solution Overview
Problem
Current beverage dispensing systems are limited in preparing high-pressure beverages like espresso, as existing capsules and apparatuses are not designed to handle pressures greater than 5 bar, leading to issues such as channeling of liquid, incomplete extraction, and cross-contamination.
Innovation Solution
A beverage preparation capsule with a V-folded filter strip and a beverage preparation apparatus featuring a clamp assembly that can apply high pressures, ensuring uniform compression and extraction of the beverage ingredient, while preventing cross-contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If water is injected at high pressure (greater than 5 bar) into existing capsules, then extraction efficiency improves, but liquid channeling and incomplete extraction occur
Solution Approach 1:
The capsule incorporates a compressed beverage ingredient bed with specific local density variations. The ingredient is compressed to create a uniform dense bed that resists high-pressure water flow evenly, preventing channeling while maintaining extraction efficiency. This local quality control of the ingredient bed density resolves the contradiction between high-pressure extraction and uniform flow distribution.
2Loss of time
If existing capsule structures are used at high pressure, then beverage preparation speed improves, but cross-contamination occurs
Solution Approach 1:
The invention employs disposable single-use capsules that are discarded after one brewing cycle. This eliminates cross-contamination between beverages by ensuring each capsule is used only once, while maintaining fast preparation speed. The disposable nature of the capsule resolves the contradiction between rapid beverage preparation and prevention of cross-contamination.
3Productivity
If water injection pressure is increased beyond 5 bar, then espresso quality improves, but capsule structural integrity fails
Solution Approach 1:
The capsule design changes key parameters including the compression density of the beverage ingredient (to 2.0-4.0 g/cm³), the structural configuration of the capsule body, and the properties of the seal. These parameter changes enable the capsule to withstand high water injection pressures (greater than 5 bar) required for espresso quality while maintaining structural integrity. The compressed ingredient bed acts as a pressure-distributing medium that prevents localized stress concentrations.
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
The solution enables the preparation of high-pressure beverages with improved extraction efficiency and reduced cross-contamination, allowing for the production of premium beverages like espresso with enhanced quality and consistency.
Implementation Method 1
injecting water under high pressure into capsules containing a beverage preparation ingredient
Implementation Method 2
a pump to inject the hot water through the injector tube into the capsule
Implementation Method 3
the beverage making ingredient dissolves in, or infuses into, the water to form the beverage
Implementation Method 4
the beverage making ingredient dissolves in, or infuses into, the water to form the beverage
Implementation Method 5
The capsule may incorporate a filter to prevent passage of solid components such as coffee grounds out of the capsule
Data Source
AI summary
A beverage preparation apparatus for preparation of a beverage from a capsule in a clamp assembly (30). The clamp assembly has a first clamp member (31) and a second clamp member, where the inner surfaces of the first clamp member and the second clamp member form a clamp chamber (33) for substantially enclosing and supporting a capsule (10) during beverage preparation. The second clamp member comprises a rigid peripheral frame (32) having a central void and a resilient layer (37) extending across said central void. There is a piston (36) positioned in the central void and resiliently coupled to the peripheral frame (32) to allow limited resilient movement of the rigid peripheral frame (32) relative to the piston (36).