Portion Capsule Venting for Fine-Bubble Espresso Crema
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Solution Overview
Problem
Existing brewing devices often produce undesirable large-bubble crema during espresso extraction due to excess pressure in the capsule, which affects the quality of the beverage.
Innovation Solution
A brewing device with a brewing chamber comprising two elements that move to form a closed chamber, featuring perforations for the capsule lid and base, and a third perforation for a ventilation opening to release gas, preventing initial pressure buildup and allowing for the formation of a fine-bubble crema by degassing the capsule before solvent introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the brewing chamber is sealed tightly to maintain pressure for extraction, then extraction efficiency is improved, but large-bubble crema forms due to excess pressure
Solution Approach 1:
The brewing chamber is segmented into multiple sealing zones: a first sealing element seals the inlet side while a second sealing element seals the outlet side. This segmentation allows independent pressure management at different locations, enabling the outlet side to vent gas while maintaining pressure at the inlet side for efficient extraction.
Solution Approach 2:
A gas venting mechanism acts as an intermediary between the sealed brewing chamber and the external environment. This intermediary component selectively allows gas to escape while maintaining the pressure necessary for extraction, thereby preventing large-bubble crema formation without compromising extraction efficiency.
2Object-affected harmful factors
If gas is vented continuously to prevent pressure buildup, then large-bubble crema is prevented, but extraction pressure is insufficient
Solution Approach 1:
Gas venting is performed as a preliminary action before the main extraction process begins. The system actively removes gas from the brewing chamber prior to introducing the extraction agent, ensuring that pressure buildup is prevented at the critical moment when extraction pressure is needed.
Solution Approach 2:
The gas venting operates periodically rather than continuously. The venting mechanism is activated at specific intervals or phases of the brewing process to release gas when needed, then closes to maintain pressure during extraction, creating a rhythmic pattern of venting and pressure maintenance.
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 prevents coarse-bubbled crema and ensures the formation of a fine-bubble crema by managing pressure within the capsule, enhancing the quality of the extracted beverage.
Implementation Method 1
A gas, for example air, which is located in the portion capsule can be forced out of the portion capsule in a targeted manner through this ventilation opening when the liquid is fed in.
Implementation Method 2
as soon as the gas has been at least largely degassed from the portion capsule, a corresponding pressure builds up in the portion capsule, which is required, for example, for the formation of a fine-bubble crema.
Data Source
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AI summary
The invention relates to a brewing device, comprising a brewing chamber for extracting and/or dissolving a substance provided in a portion capsule, wherein the brewing chamber has a first brewing chamber element and a second brewing chamber element and the first brewing chamber element can be moved between a loading position, in which the first and second brewing chamber elements are at a distance from one another, and an extraction position, in which the first and second brewing chamber elements are moved toward one another in order to form a substantially closed brewing chamber, and each brewing chamber element has a perforation means, wherein the capsule lid can be punctured using the first perforation means and the bottom area of the portion capsule can be punctured using the second perforation means. The invention further relates to a method for extracting and/or dissolving a substance that is provided in a portion capsule, wherein the portion capsule is opened on the feed side of the portion capsule and on the drain side of the portion capsule.