Cone Filter Insert With Permeability Zones to Prevent Overflow
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Solution Overview
Problem
Existing cone-shaped filter inserts for brewing aromatic beverages like coffee do not effectively manage permeability to optimize extraction quality and prevent brewing water overflow, leading to inconsistent beverage strength and taste.
Innovation Solution
A cone-shaped filter paper insert with three parallel zones of increasing permeability from the bottom to the upper filling opening, achieved through varying hole diameters or numbers of perforations, which controls brewing water flow and contact time with aromatic substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single permeability design is used throughout the filter insert, then the structure is simple, but the brewing water flow is not evenly distributed and overflow cannot be prevented
Solution Approach 1:
The filter insert is divided into three distinct circumferential zones with different permeability characteristics. The side wall comprises a first circumferential zone, a second circumferential zone, and a third circumferential zone, each with progressively different permeability to brewing water. This segmentation allows precise control of water flow at different heights, preventing overflow while maintaining structural functionality.
Solution Approach 2:
Different regions of the filter insert are assigned different permeability properties to meet local requirements. The first circumferential zone has lower permeability to prevent overflow at the bottom, while the third circumferential zone has higher permeability to allow efficient extraction at the top. This local differentiation of properties optimizes both flow control and extraction efficiency.
2Reliability
If the upper region has high permeability to prevent overflow, then water flows easily, but the lower region needs low permeability for proper extraction
Solution Approach 1:
The filter insert employs a dynamic permeability gradient that varies continuously from the bottom to the top. The permeability increases progressively through the three circumferential zones, creating a dynamic flow resistance profile that adapts to the brewing process requirements at different heights, rather than using static uniform permeability.
Solution Approach 2:
The permeability parameter is systematically changed across the three circumferential zones. The first zone has the lowest permeability, the second zone has intermediate permeability, and the third zone has the highest permeability. This parameter gradient is achieved through controlled variations in perforation density, hole size, or material structure in each zone.
3Reliability
If uniform perforation is used throughout, then manufacturing is simple, but extraction quality and beverage strength become inconsistent
Solution Approach 1:
The uniform perforation structure is segmented into three distinct circumferential zones with different perforation characteristics. Each zone is designed with specific perforation density, hole diameter, or pattern to achieve the desired permeability gradient, ensuring consistent extraction quality throughout the brewing process.
Solution Approach 2:
The perforation characteristics are locally optimized in each circumferential zone. The lower zones have denser or smaller perforations for controlled water distribution and proper extraction, while the upper zones have sparser or larger perforations to prevent overflow and allow efficient beverage discharge, maintaining consistent quality throughout.
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 design enhances the quality and taste of brewed beverages by ensuring consistent brewing water distribution and preventing overflow, allowing for controlled brewing operations and optimal extraction of aromatic compounds.
Implementation Method 1
the side wall has three parallel, circumferential zones of increasing permeability in a direction from the closed bottom to the upper filling opening
Data Source
AI summary
A filter paper insert for a brewed beverage includes a filter paper shaped to form a cone-shaped filter having a side wall, a closed bottom and an upper filling opening. The side wall has three parallel, circumferential zones of increasing permeability in a direction from the closed bottom to the upper filling opening.