Espresso Extraction Device And Method
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Solution Overview
Problem
Existing espresso extraction devices struggle to maintain constant extraction pressure, leading to inconsistent flavor due to variations in pressure applied to coffee bean powder, affected by factors like coffee bean quality, tamping, and shared water flow paths with ice machines.
Innovation Solution
An espresso extraction device and method that utilize a control unit to adjust pressure in real-time based on sensor data from the extraction unit, comparing extraction pressure to a reference pressure and controlling the pressure unit to maintain consistency, while removing bubbles to stabilize pressure and minimize errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure is adjusted by a pressure unit and measured, then pressure can be controlled, but the extraction pressure actually applied to coffee bean powder varies due to factors like tamping state and coffee bean properties
Solution Approach 1:
The patent implements a feedback control system where a sensor unit continuously measures the actual extraction pressure in the extraction unit and sends this information to a control unit. The control unit then adjusts the pressure unit in real-time to maintain the desired extraction pressure, compensating for variations caused by tamping state, coffee bean properties, and other factors. This closed-loop feedback mechanism ensures consistent extraction pressure despite external variations.
Solution Approach 2:
The patent replaces direct mechanical pressure measurement in the pressure unit with a sensor unit that measures the actual extraction pressure at the point of application. This substitution allows for more accurate measurement of the effective pressure and enables real-time adjustments to maintain consistent extraction conditions.
2Adaptability or versatility
If a shared flow path is used with an ice machine, then water supply is available, but the amount of water supplied affects extraction pressure stability
Solution Approach 1:
The feedback control system continuously monitors extraction pressure and adjusts the pressure unit to compensate for water supply variations caused by sharing the flow path with the ice machine. When water flow changes affect extraction pressure, the sensor detects this and the control unit adjusts pressure accordingly to maintain stability.
3Ease of operation
If bubbles are present in the extraction unit, then fluid can be introduced easily, but bubbles cause pressure fluctuations and affect extraction quality
Solution Approach 1:
The patent introduces a fluid (water) into the extraction unit before performing the main extraction operation. This preliminary action serves to flush out and remove air bubbles from the system, ensuring that the fluid path is completely filled with water. By removing bubbles beforehand, the system achieves stable pressure conditions for the subsequent extraction process while maintaining ease of fluid introduction.
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 ensures constant extraction pressure, minimizing flavor inconsistencies and allowing espresso extraction regardless of water temperature, by accurately adjusting pressure and removing bubbles, thus maintaining a consistent flavor and pressure throughout the extraction process.
Implementation Method 1
receiving extraction pressure in the extraction unit by means of the sensor unit
Implementation Method 2
extracting espresso by applying pressure to a fluid which is contained in the extraction unit by operating the pressure unit
Implementation Method 3
removing bubbles in the pressure unit by filling the pressure unit with a fluid and controlling the operation of the valve unit; removing bubbles in the extraction unit by filling the extraction unit with a fluid and controlling the operation of the valve unit
Data Source
AI summary
An espresso extraction device and an espresso extraction method are described that utilize a control unit that controls an operation of a valve unit or a pressure unit that adjusts pressure applied to an extraction unit of the device based on sensing data of a sensor unit in the extraction unit. A portafilter can be mounted on a head of the extraction unit, removing bubbles in the pressure unit by filling the pressure unit with a fluid and controlling the operation of the valve unit, removing bubbles in the extraction unit by filling the extraction unit with a fluid and controlling the operation of the valve unit, extracting espresso by exerting pressure to a fluid contained in the extraction unit by operating the pressure unit, receiving extraction pressure in the extraction unit via a sensor unit, and controlling the operation of the pressure unit on the basis of extraction pressure.