Beverage Capsule Filter Plate Structure for Pressure Stability
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Solution Overview
Problem
Existing beverage capsule filter plates destabilize and shift due to high internal pressure from injected liquids, leading to ineffective filtration and potential structural failures.
Innovation Solution
A capsule structure with a filter plate featuring a specialized geometry, including a filtering area with radial ridges and a membrane that breaks under pressure, combined with an external container design incorporating concentric ridges and teeth for secure fit and air chamber pressure equalization, enhancing rigidity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple filter plate is used in the capsule, then the device complexity is reduced and manufacturing is easier, but the filter plate becomes destabilized and shifts due to high internal pressure
Solution Approach 1:
The filter plate is segmented into multiple functional zones: a filtering area with holes for beverage extraction, a central area for structural support, and a lower area with a lip for positioning. The base includes radial ridges that divide the structure into segments, allowing differential response to pressure while maintaining overall stability.
Solution Approach 2:
Different regions of the filter plate have different geometric properties optimized for their specific functions. The central area has greater thickness for pressure resistance, the filtering area has holes for extraction, and the lower area has a lip for positioning. This local differentiation allows the structure to handle high pressure while maintaining stability.
2Reliability
If the filter plate geometry is optimized for pressure absorption, then the stability under pressure improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The filter plate incorporates curved surfaces and rounded transitions between zones, particularly in the frustoconical shape of the filtering area and the smooth integration of the lip. These curved geometries distribute stress more evenly and can be manufactured using standard injection molding techniques, balancing complexity with manufacturability.
3Reliability
If a membrane is added to delimit the inner chamber, then the filtration process is improved and pressure control is enhanced, but the device complexity increases
Solution Approach 1:
A flexible membrane is used to delimit the inner chamber, allowing it to expand and contract with pressure changes during the brewing process. The membrane is positioned to break at a specific pressure threshold, providing automatic pressure relief and enhanced filtration control without requiring complex mechanical systems.
4Reliability
If the external container includes ridges and teeth for secure fit, then the filter plate stability improves, but the manufacturing complexity of the external container increases
Solution Approach 1:
The ridges and teeth on the external container bottom are designed to create a stable equilibrium position for the filter plate. The geometric features are arranged concentrically to provide uniform support around the filter plate perimeter, ensuring consistent positioning without requiring complex asymmetric structures.
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 effectively absorbs and manages internal stress, maintaining filter plate stability and improving the filtration process by preventing pressure-induced movement and ensuring consistent beverage production.
Implementation Method 1
a membrane, designed to break under the effect of pressure, when the pressure inside said inner chamber reaches a certain level
Implementation Method 2
the geometry of said filter plate is such that it is capable of absorbing, more efficiently than in the case of other filter plates known in state of the art, the internal stress generated inside the capsule as a consequence of the increase in pressure
Implementation Method 3
the base of the filtering area of the filter plate comprises a plurality of radial ridges... the external container comprises, internally, on its bottom, several ridges and several teeth
Data Source
AI summary
A capsule structure for preparing beverages, which comprises an external container of the capsule and a filter plate, wherein the filter plate comprises at least: a filtering area, with a base that comprises a plurality of holes; an intermediate chamber, located immediately below the filtering area and a lower area with a side wall with an edge, wherein the bottom of the external container comprises on its inside several ridges and teeth, wherein the edge of the side wall of the lower area of the filter plate is inserted between said ridges and said teeth of the bottom of the external container, fitting tightly between said ridges and said teeth. In one embodiment, the intermediate chamber is delimited by the lower area itself.