Capsule Centering Mechanism for Leak-Free Espresso Infusion
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Solution Overview
Problem
Existing infusion devices for preparing beverages from single-serving capsules face challenges in aligning the capsule correctly with the perforator, leading to potential pressure drops and leakage during the brewing process, especially when producing espresso, due to misalignment issues.
Innovation Solution
An infusion device with a centering and guide member that is elastically movable and projects from the seat to ensure the capsule is aligned parallel to the axis of the infusion chamber, allowing for optimal perforation and easy ejection after brewing, using a combination of springs and guide surfaces to maintain alignment and facilitate capsule removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the capsule is inserted without a centering mechanism, then the device structure is simpler, but the capsule alignment with the perforator is poor causing pressure drops and leakage
Solution Approach 1:
A centering member is introduced as an intermediary element between the capsule and the seat. This centering member includes a centering surface that guides and centers the capsule during insertion, ensuring proper alignment with the perforator while preventing misalignment issues that cause leakage and pressure drops.
Solution Approach 2:
The centering member is positioned in advance within the seat to prepare the insertion path. Before the capsule is inserted, the centering surface is already in place to guide the capsule's movement and ensure it reaches the correct position and orientation for perforation, preventing alignment errors before they occur.
2Reliability
If the capsule is tightly retained in the seat, then the infusion pressure is maintained, but the capsule is difficult to eject after brewing
Solution Approach 1:
The system transitions from a static retention mechanism to a dynamic one. During infusion, the capsule is tightly retained to maintain pressure. After brewing, the ejection mechanism activates to push the capsule out. This dynamic adjustment allows the system to maintain reliability during operation while enabling easy ejection when needed.
Solution Approach 2:
The capsule retention and ejection occur in periodic cycles. During the brewing phase, the capsule is firmly held in position to ensure proper infusion pressure and prevent leakage. After brewing completes, the system periodically activates the ejection mechanism to remove the spent capsule, alternating between retention and ejection states.
3Manufacturing precision
If the centering member is fixed in the seat, then the alignment is stable, but the capsule insertion and ejection is hindered
Solution Approach 1:
The centering member is made movable rather than fixed. It can move axially within the seat to accommodate capsule insertion and ejection. During insertion, the centering member retracts to allow the capsule to pass. During infusion, it moves into position to provide alignment. This dynamic movement maintains alignment precision while enabling smooth operation.
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 solution ensures precise alignment of the capsule with the perforator, preventing pressure drops and leakage, and allows for easy removal of the capsule after brewing, enhancing the operational efficiency and effectiveness of the infusion process.
Implementation Method 1
a centering and guide member (40) housed in said seat and elastically movable in an axial direction and provided with a guide and centering surface of the capsules
Implementation Method 2
provided with a guide and centering surface of the capsules
Data Source
Figure 1
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AI summary
The infusion device comprises an infusion chamber with a first portion (5) and a second portion (3), movable with respect to each other, and one of which defining a seat (25) for the capsules (C). In the seat there is disposed at least one perforator (27) to perforate the capsule. A first duct (47) feeds an infusion fluid into the chamber and a second duct (29) allows delivery of the food product from the infusion chamber. In said seat (25) there is housed a centering member (40) of the capsules (C), elastically movable in an axial direction and provided with a guide and centering surface (40A) of the capsules, facing towards the second of said portions of the infusion chamber.