Coffee Filter-Holder Back-Pressure Control for Brew Strength
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Solution Overview
Problem
Current coffee-making filter-holders lack the ability to control and adjust the organoleptic qualities of coffee, such as strength and concentration, due to unregulated infusion conditions, which are influenced by factors like coffee compression, quantity, and moisture content.
Innovation Solution
A filter-holder with a pressure stabilizing valve and an adjustable regulating device that modifies the cross-section of the coffee outlet orifice, allowing users to adjust the infusion conditions for varying coffee strengths and concentrations through a screwing mechanism and rotating shutter element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple connection pipe is used downstream from the filter, then the device complexity is reduced, but the coffee quality control and reproducibility deteriorate
Solution Approach 1:
The patent applies parameter changes by introducing a valve mechanism that can modify the cross-section of the coffee outlet lumen. This valve changes the flow parameters (flow rate, pressure) to control infusion conditions, thereby improving coffee quality consistency while maintaining reasonable device complexity through a single adjustable component.
2Reliability
If a valve for compensating back-pressure is added, then the coffee quality control is improved, but the device complexity increases
Solution Approach 1:
The patent applies dynamics by designing a valve with an adjustable cross-section that can be modified during operation. The valve transitions from a static simple pipe to a dynamic system where the outlet dimensions can be changed to control coffee flow and pressure, improving quality control without excessive complexity increase.
3Reliability
If the cross-section of the coffee outlet lumen is modified to control infusion conditions, then the coffee quality and concentration control are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the outlet control function into a separate valve component with a distinct adjustable cross-section. This segmentation allows the valve to be manufactured as a modular part with standardized machining features, improving ease of manufacture while maintaining the ability to control coffee quality through cross-section modification.
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
Enables users to consistently produce coffee of desired strength and concentration by stabilizing back-pressure and adjusting the flow rate, improving the reproducibility and control over coffee quality.
Implementation Method 1
an elastic member, associated with a member for throttling the inlet to modify the cross-section of the passage through said opening
Implementation Method 2
a valve for stabilising or compensating the infusion back-pressure... an adjustable shutter element for modifying the cross-section of the passage through said orifice
Data Source
AI summary
A filter-holder for use in coffee machines, comprising: a cup in which a filter containing the coffee is inserted; at least one delivery spout; and a valve associated with the delivery spout for stabilizing the infusion back-pressure. The filter-holder also comprises a regulating device for adjusting the flow of coffee through the stabilizing valve so as to preset the organoleptic characteristics of the resulting beverage.