Espresso Filter Holder With Narrow-Throat Flow Control
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Solution Overview
Problem
Conventional espresso machine filter holders lack efficient mechanisms for regulating back pressure and coffee flow, leading to suboptimal coffee dispensing, especially when using coffee capsules, resulting in poor crema quality and increased drip formation.
Innovation Solution
A filter holder design featuring a handle and outer holder with a flow path including a shallow bowl and a narrow throat that reduces coffee velocity, combined with longitudinally extending ribs in the spouts to direct coffee flow and a filter plate with upstanding elements for coffee capsules, allowing for simultaneous discharge into two cups and improved crema production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional filter holder design is used, then结构简单性 (structural simplicity) is maintained, but coffee flow regulation and crema quality deteriorate
Solution Approach 1:
The flow path is segmented into distinct functional zones: a shallow bowl section for initial coffee accumulation, a narrow throat section for velocity increase and back pressure regulation, and an outlet section for coffee discharge. This segmentation allows each zone to perform its specific function optimally, improving crema quality through controlled flow dynamics without requiring complex external regulation mechanisms.
Solution Approach 2:
The throat cross-sectional area is specifically designed to be smaller than both the bowl and outlet areas, creating a parameter change that accelerates coffee flow through the throat. This geometric parameter variation naturally regulates back pressure and increases coffee velocity, enhancing crema formation without adding complex active control systems.
2Productivity
If single spout design is used, then device simplicity is maintained, but productivity deteriorates due to inability to serve multiple cups simultaneously
Solution Approach 1:
The outlet is segmented into two separate spouts positioned at different locations, allowing simultaneous dispensing of coffee into two different cups. Each spout functions as an independent discharge channel, doubling the productivity for multi-cup service while maintaining relatively simple structural implementation.
Solution Approach 2:
The filter holder is designed with multi-functionality to serve both single-cup and double-cup scenarios. The dual spout configuration allows the device to adapt to different service requirements, providing versatility in coffee dispensing operations without requiring separate equipment for different cup quantities.
3Object-affected harmful factors
If conventional spout without flow division is used, then structural simplicity is maintained, but coffee flow direction control deteriorates leading to increased drip formation
Solution Approach 1:
The spout internal structure is segmented with a longitudinal rib that divides the coffee flow into separate streams. This segmentation improves flow direction control, directing coffee precisely into the cup and reducing uncontrolled dripping. The rib creates distinct flow paths that maintain better coherence and reduce splashing or dripping hazards.
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 design enhances coffee flow direction, reduces drip formation, and improves crema quality by increasing coffee velocity through a narrow throat and using a filter plate with upstanding elements for coffee capsules, accommodating both ground coffee and capsules with efficient coffee dispensing.
Implementation Method 1
the cross-sectional area of the throat is smaller than the cross-sectional area of the spout so that the liquid coffee has a higher velocity through the throat
Implementation Method 2
the filter having a plurality of perforations adapted to allow passage of liquid coffee from the coffee container through a flow path to an outlet
Data Source
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AI summary
A filter holder for an espresso coffee machine comprises a handle (1) and an outer holder (2), which outer holder is adapted to receive either a coffee container (15) having a filter, the filter having a plurality of perforations adapted to allow passage of liquid coffee from the coffee container or a coffee capsule through a flow path to a dispensing spout or spouts. The flow path includes an intermediate chamber leading to an outlet throat (16), the throat being in direct fluid communication with the dispensing spout(s). The cross-sectional area of the throat is smaller than the cross-sectional area of the spout(s).