Centrifugal Coffee Capsule Flow Restriction for Stable Extraction
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Solution Overview
Problem
Existing coffee preparation systems using centrifugal forces face challenges with manual dosing and handling, inconsistent coffee quality due to uncontrolled brewing parameters, and difficulty in maintaining coffee freshness, leading to inefficient and time-consuming processes with limited commercial success.
Innovation Solution
A capsule system with a flow restriction mechanism, including a valve that controls the release of liquid based on pressure, creating a pressure drop and shear stresses to enhance interaction between water and coffee grounds, and a design that includes a water injection subassembly for precise brewing, allowing for adjustable pressure and improved foam creation.
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 system is divided into separate components: a removable receptacle that can be detached from the brewing device. This allows the receptacle to be filled with pre-dosed coffee pods or capsules outside the device, ensuring precise dosage control while keeping the device structure relatively simple.
Solution Approach 2:
Coffee is pre-dosed into pods or capsules before insertion into the receptacle. This preliminary dosing action ensures precise coffee quantity control is achieved outside the device, eliminating the need for complex dosing mechanisms within the brewing device itself.
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 receptacle is designed to be completely removable from the brewing device. After brewing, the entire receptacle containing coffee grounds can be easily extracted and disposed of as a single unit, eliminating the time-consuming scraping operation and greatly improving ease of operation.
Solution Approach 2:
The system uses disposable coffee pods or capsules that are discarded after a single use. This eliminates waste removal operations entirely, as the entire coffee container is thrown away after brewing, saving both time and effort.
3Manufacturing precision
If centrifugal brewing with flow restriction is used, then manufacturing precision of brewing parameters is improved, but device complexity increases
Solution Approach 1:
Flow restriction is achieved through locally optimized features in the brewing chamber, such as specific screen mesh sizes or restricted outlet openings in the receptacle. These localized structural features control water flow and contact time without requiring complex overall device mechanisms.
Solution Approach 2:
The system controls brewing parameters by changing physical characteristics of components - such as screen pore size, outlet opening dimensions, or receptacle geometry - rather than using complex active control mechanisms. This achieves precise parameter control through passive structural design.
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 enables controlled and efficient coffee extraction with improved in-cup quality, higher control over brewing parameters, and enhanced foam creation, resulting in a more convenient and reproducible brewing process with better coffee quality and stability.
Implementation Method 1
by passing water through the substance using centrifugal forces
Implementation Method 2
The flow restriction means can be configured for providing a pressure drop of at least 0.5 bar of relative pressure during centrifugation
Data Source
Figure 1~2
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Figure 5~6
AI summary
Method for preparing a food liquid from a food substance contained in a receptacle by passing water through the substance using centrifugal forces comprising: driving the receptacle in centrifugal rotation while introducing water in the capsule, passing water through the substance to form a food liquid, collecting the centrifuged food liquid, wherein the receptacle is a single-use capsule (1) and, a flow restriction means (56) is arranged within the flow path of the centrifuged liquid.