Coffee Infusion Chamber Switching for Espresso and Long Coffee
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Solution Overview
Problem
Existing coffee machines lack a simple and reliable mechanism to produce coffee of varying qualities, such as espresso and fresh brew, without requiring complex control of the pump or additional mechanisms.
Innovation Solution
A coffee machine with a movable infusion chamber and a dispensing unit that switches between configurations based on the chamber's position, allowing for different infusion volumes and pressures, enabling the production of various coffee types without needing further controls or pump adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a valve and throttling device are added to modify the cross section of the coffee passage, then different coffee qualities can be produced, but the device complexity increases
Solution Approach 1:
The coffee passage is divided into multiple segments with different cross-sectional areas. The passage includes a first section with a larger cross section for high-flow coffee and a second section with a smaller cross section for low-flow coffee, allowing different coffee qualities without additional valves or throttling devices
Solution Approach 2:
Instead of using a valve to restrict flow, the invention inverts the approach by providing multiple passages with different inherent cross-sections. The pump delivers water at constant pressure, and the different passage geometries naturally produce different flow rates and coffee qualities
2Adaptability or versatility
If the pump is controlled to deliver water at different pressures, then different coffee qualities can be obtained, but the ease of operation decreases
Solution Approach 1:
The system eliminates the need for user control of pump pressure. The pump automatically delivers water at constant rated pressure, and the multi-section passage design with different cross-sectional areas self-regulates the flow rate and coffee quality based on which passage is active
3Adaptability or versatility
If additional control mechanisms are added to switch between coffee types, then coffee quality variation is improved, but the ease of repair worsens
Solution Approach 1:
The invention extracts and eliminates unnecessary control mechanisms such as valves, actuators, and electronic controls. The coffee type switching is achieved purely through the fixed geometric design of the multi-section passage, making the system simpler to repair and maintain
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 machine can reliably produce a range of coffee types, from thick espresso to long coffee, using a simple and sturdy design that allows for easy operation and maintenance, with adjustable parameters for infusion conditions.
Implementation Method 1
a duct (7) to supply pressurized hot water to the infusion chamber (3A) and at least one pump (13) to supply pressurized hot water to the infusion chamber (3A)
Implementation Method 2
through which pressurized water is subsequently made to flow at a sufficiently high temperature to extract the flavors of the coffee powder
Implementation Method 3
an infusion chamber (3A), inside which a charge of ground coffee or a single-serving sachet... containing coffee powder, is placed
Data Source
AI summary
A device with an infusion chamber defined by at least two parts movable in relation to each other to close and open the infusion chamber; a duct to supply pressurized hot water to the infusion chamber; at least one pump to supply pressurized hot water to the infusion chamber; and a dispensing unit to dispense coffee from the infusion chamber. The dispensing unit has at least a first configuration and a second configuration, according to the type of coffee to be dispensed; the two parts defining the infusion chamber have at least a first reciprocal position to define a larger infusion volume and a second reciprocal position to define a smaller infusion volume and the dispensing unit is switched to one or other of said at least two configurations when said at least two parts are in the second reciprocal position.