Espresso Machine Pressure Adaptor for Variable Extraction Control
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Solution Overview
Problem
Espresso machines configured to produce a static water pressure during brewing lack the ability to achieve various desired extractions that impart different flavor notes on the brewed beverage for a given ground coffee.
Innovation Solution
A retrofit adaptor for espresso machines that allows adjustable pressure regulation of heated water flowing through the coffee grounds, enabling variable pressure profiles by integrating a pressure regulator and control device, such as a knob or handle, to adjust the water pressure manually or electronically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a static pressure brewing machine is used, then the machine structure is simple and reliable, but the ability to achieve various desired extractions and flavor notes is limited
Solution Approach 1:
An adaptor is introduced as an intermediary component between the group head and portafilter. This adaptor contains a pressure regulator that modifies the static pressure output of the brewing machine, enabling variable pressure brewing without redesigning the entire machine. The adaptor acts as a mediator that adds functionality while maintaining compatibility with existing simple machine structures.
Solution Approach 2:
The pressure regulation function is segmented from the main brewing machine and placed in a separate, removable adaptor component. This allows the pressure control mechanism to be added independently without complicating the main machine structure. The adaptor can be installed or removed as needed, keeping the base machine simple while providing advanced functionality when required.
2Adaptability or versatility
If a pressure regulator is added to enable adjustable pressure, then flavor extraction flexibility is improved, but device complexity increases
Solution Approach 1:
The adaptor serves multiple functions: it maintains the original brewing capability while simultaneously providing pressure regulation. The same adaptor structure houses both the mechanical connection interface and the pressure control mechanism, making the added component highly versatile and justifying its inclusion despite the increase in overall system complexity.
3Adaptability or versatility
If an adaptor with pressure regulator is installed, then customization of brewing parameters is enabled, but ease of operation is reduced
Solution Approach 1:
The pressure regulator is designed with a self-adjusting mechanism that allows the user to directly control the pressure setting without requiring complex calibration or external equipment. The adaptor interfaces with existing machine components in a straightforward manner, and the pressure adjustment mechanism is designed to be user-friendly, allowing brewers to easily experiment with different pressure settings to achieve desired extraction profiles.
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 a broad range of coffee taste and preparation options by allowing for customizable pressure adjustments, enhancing flavor extraction and flexibility in brewing different coffee roasts.
Implementation Method 1
an adjustable pressure regulator disposed along the water conduit. The pressure regulator comprises a control device such as a knob, handle, switch, that is to be manipulated to adjust the water pressure of the heated water flowing through the water conduit
Implementation Method 2
pivotally adjusted to cause a portion of the adaptor to travel along a camming surface, thereby urging the adaptor toward the group head
Data Source
AI summary
Provided are an apparatus and method that provides a brewing machine that produces a static water pressure with a variable water pressure. A first portion of an adaptor includes a peripheral wall that defines a region that receives heated water at a first pressure. A plurality of flanges protrude outwardly from the peripheral wall and cooperate with a group head of the brewing machine that is configured to receive and support a portafilter. A second portion is separate from the first portion, and arranged below the first portion to receive a portafilter basket. A conduit conveys water between the first portion and the second portion. A pressure regulator in fluid communication with the internal passage adjusts the heated water from the first pressure to a second pressure that is less than the first pressure, to be introduced to coffee in the portafilter basket at the second pressure.