Espresso Water Flow Regulator With Rotary Shutter Precision Control
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Solution Overview
Problem
Existing water flow regulators in espresso coffee machines lack accuracy and repeatability, particularly during the pre-infusion step, failing to provide adjustable and consistent water flow for optimal coffee extraction.
Innovation Solution
A water flow regulator with a rotary actuator, reducer, and shutter system that converts rotary motion into linear motion, allowing precise control of the water flow rate, featuring a guide element, cam, and elastic elements for stable and accurate operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional flow regulator with a pump is used, then water flow can be dispensed, but the accuracy and repeatability of water flow regulation is insufficient
Solution Approach 1:
The patent replaces the conventional pump-based mechanical flow control system with a pressure-driven system using a pressure generator (membrane pump) and a precision regulator valve. This substitution eliminates the inherent inaccuracies of pump-based flow control and enables precise, repeatable flow regulation through pressure control and mechanical valve adjustment.
Solution Approach 2:
The patent changes the control parameter from direct mechanical flow control to pressure control. By using a pressure generator to maintain constant upstream pressure and a regulator valve to control downstream pressure, the system achieves accurate and repeatable flow regulation based on pressure differential rather than mechanical pump characteristics.
2Adaptability or versatility
If the flow regulator is set to a closed configuration to slow down water flow for pre-infusion, then pre-infusion can be performed, but the flow cannot be adjusted accurately for different coffee types or environmental conditions
Solution Approach 1:
The patent implements a dynamic flow control system with a regulator valve that can be adjusted to different positions to change the flow rate. The valve mechanism allows continuous adjustment of the opening degree, enabling adaptation to different coffee types, environmental conditions, and pre-infusion requirements while maintaining precise flow control through its mechanical design.
3Device complexity
If a simple throttling valve is used in parallel to the duct, then the device complexity is reduced, but the flow regulation accuracy and repeatability deteriorates
Solution Approach 1:
The patent segments the flow control function into two independent components: a pressure generation system (membrane pump) and a flow regulation system (regulator valve). This segmentation allows each component to be optimized for its specific function - the pressure generator provides stable pressure while the regulator valve provides precise flow control - resulting in improved overall accuracy without excessive complexity.
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 highly accurate and repeatable water flow regulation, ensuring consistent espresso quality by compensating for environmental changes and varying coffee grounds, resulting in consistent organoleptic and aromatic characteristics.
Implementation Method 1
an elastic element (20) operating between the guide element (12) and the shutter (9)
Data Source
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AI summary
A water flow regulator for an espresso coffee machine comprises a main body (4) through which water flows, a shutter (9) for opening and/or closing a water passage opening in the main body (4), and a rotary actuator (10) operating onto the shutter (9) to move it between its open configuration and its closed configuration; the flow regulator (1) also comprising a reducer (11) operationally located between the actuator (10) and the shutter (9).