Centrifugal Coffee Capsule Piercing and Valve Control for Crema
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Solution Overview
Problem
Existing coffee preparation systems using centrifugal forces face challenges with manual dosing, coffee freshness control, and inconsistent cup quality due to manual handling and lack of control over extraction parameters, leading to inefficient and time-consuming processes.
Innovation Solution
A capsule system with a non-moving water injector and a rotary engaging member that rotates with the capsule holder, featuring piercing members to create liquid delivery outlets and a valve system for controlled pressure drop, ensuring precise water interaction with the coffee grounds and improved crema formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual dosing of coffee powder is used in non-removable receptacles, then device complexity is reduced, but manufacturing precision of dosage and coffee freshness control deteriorate
Solution Approach 1:
The coffee preparation system is segmented into separate functional components: a removable capsule holder containing pre-dosed coffee capsules, and a fixed brewing chamber. This segmentation allows precise factory dosing in capsules while keeping the brewing device simple.
Solution Approach 2:
Coffee is pre-dosed and sealed in capsules during manufacturing before use. This preliminary action ensures precise dosage control without requiring complex dosing mechanisms in the brewing device, resolving the contradiction between device simplicity and dosing precision.
2Ease of operation
If manual handling and scraping of coffee waste is required, then ease of operation deteriorates, but loss of time increases
Solution Approach 1:
The capsule holder is designed to be completely removable from the brewing chamber. After brewing, the user simply extracts the entire capsule holder with spent grounds, eliminating the need for manual scraping and waste removal operations.
Solution Approach 2:
The capsule holder serves as a self-contained unit that handles both the brewing process and waste containment. The spent coffee grounds remain contained within the removable holder, allowing automatic waste separation without additional manual intervention.
3Productivity
If centrifugal brewing is used, then extraction efficiency is improved, but control over extraction parameters becomes more difficult
Solution Approach 1:
The system uses centrifugal force as the primary extraction mechanism, changing from pressure-based to rotation-based parameter control. The capsule holder rotates at controlled speeds, and water is injected centrally to create consistent centrifugal extraction without requiring complex pressure regulation systems.
Solution Approach 2:
Traditional pressure-based extraction mechanisms are replaced with a centrifugal system where the capsule holder rotates and water is injected through a central nozzle. This mechanical substitution simplifies parameter control by using rotation speed and central water injection rather than complex pressure pumps and flow distributors.
4Ease of operation
If a rotary engaging member with piercing members is used, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The water injection nozzle and capsule piercing function are merged into a single rotary engaging member. As the capsule holder rotates into position, the same rotating component that engages the capsule also pierces it and injects water centrally, combining multiple functions without increasing overall device complexity.
Solution Approach 2:
The rotary engaging member serves multiple functions: it engages the removable capsule holder, pierces the capsule seal, and delivers central water injection. This multi-functional design improves ease of operation while avoiding the need for separate mechanisms for each function.
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 system provides a convenient, high-quality coffee preparation with better control over extraction parameters, improved crema stability, and consistent results by ensuring accurate dosing and freshness, reducing manual handling and increasing operational efficiency.
Implementation Method 1
by passing water through the substance using centrifugal forces
Implementation Method 2
The capsule is driven in centrifugal rotation while introducing water in the centre of capsule, passing water through the substance to form a food liquid, which is then centrifuged peripherally in the capsule
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A single-use capsule for preparing a food liquid from a food substance contained in the capsule by introducing water in the capsule and passing water through the substance using the centrifugal forces for producing the food liquid which is centrifuged peripherally in the capsule relatively to a central axis of the capsule corresponding to an axis of rotation during the centrifugation, comprising: an upper wall (3) and a bottom wall (6), a widening side wall (7) connecting to the upper and lower walls and, an enclosure (82) containing a predetermined amount of a food substance, wherein the upper wall comprises a peripheral outlet region (87) which is perforable and dedicated for providing outlets for the release of the liquid.