Espresso Brew Group Preinfusion Valve for Adjustable Soaking
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Solution Overview
Problem
Existing espresso coffee machines lack user control over preinfusion time and do not allow independent adjustment for multiple brew groups, limiting the customization of the preinfusion process.
Innovation Solution
A flow diverter and divider device is integrated into the espresso coffee machine, featuring a piston that can be manually positioned to control the diversion of hot water flow, allowing for adjustable preinfusion time and independent operation across multiple brew groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a fixed timer-based preinfusion system is used, then the preinfusion process is automated, but the user cannot adjust the preinfusion time
Solution Approach 1:
The patent applies the dynamics principle by replacing the fixed timer mechanism with a manually adjustable valve system. The valve allows users to dynamically control the preinfusion time by adjusting the opening degree, transforming a static automated system into a dynamic one that adapts to different user needs and coffee types while maintaining operational simplicity.
2Device complexity
If a single preinfusion system is used for multiple brew groups, then the device complexity is reduced, but independent control for each group is lost
Solution Approach 1:
The patent applies segmentation by providing each brew group with its own independent preinfusion valve. This allows each group to be controlled separately, enabling users to apply preinfusion to one group without affecting others, and to adjust each group's preinfusion time independently while maintaining a relatively simple overall system architecture.
3Reliability
If pressure damping is used during preinfusion, then the coffee powder is properly soaked, but the infusion pressure build-up time increases
Solution Approach 1:
The patent applies parameter changes by allowing users to adjust the valve opening degree to control water flow rate during preinfusion. By optimizing this parameter, users can achieve proper coffee powder soaking while minimizing the time required, finding the optimal balance between soaking quality and time efficiency for different coffee types and preferences.
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 user-defined preinfusion time for each brew group, enhancing the customization and efficiency of the espresso brewing process while maintaining compatibility with existing machine designs.
Implementation Method 1
A flow diverter and divider device is integrated into the espresso coffee machine, featuring a piston that can be manually positioned to control the diversion of hot water flow
Implementation Method 2
The pressure damping device comprises a cylindrical chamber containing a piston which is acted upon by a calibrated spring in order to cancel out the volume of the chamber, so that the water pressure in the infusion unit gradually exceeds atmospheric pressure
Data Source
AI summary
An espresso coffee machine comprises a boiler and a pump for feeding hot water under pressure to one or more brew groups (1), each of which comprises a receptacle (24) for infusing a predetermined dose of ground coffee, a hot water feed pipe (38) and an outlet pipe (40). Manual operating means (30, 50) are provided at the inlet of each brew group for selectively putting the coffee powder receptacle (24) in communication with the water feed pipe (38), with the outlet pipe 40 or with both the pipes in order to preinfuse the coffee powder.