Beverage brewer
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Solution Overview
Problem
Existing brewing devices for hot beverages like coffee and tea do not effectively combine compression and high-temperature fluid flow to optimize essence extraction from organic materials, leading to inefficient brewing processes.
Innovation Solution
A brewer with a piston-cylinder assembly that includes a frusto-conical diffuser and a freely movable mass, which creates an expansion chamber for high-pressure fluid to flow through, allowing for controlled pressure and flow distribution across the grounds, enhancing extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a simple piston-cylinder assembly is used for brewing, then the device structure is simple and manufacturing cost is low, but the extraction efficiency of essences from grounds is insufficient
Solution Approach 1:
The piston subassembly is segmented into multiple functional components: a frusto-conical diffuser with a nozzle at its lower end, a diffuser plate with multiple holes, and a freely movable mass. This segmentation allows each component to perform a specific function - the nozzle creates a jet flow, the diffuser expands and distributes the fluid, and the mass provides compression - thereby improving extraction efficiency while keeping the overall device structure relatively simple
Solution Approach 2:
The frusto-conical diffuser acts as an intermediary between the nozzle and the grounds. It receives the high-velocity jet flow from the nozzle, expands and distributes it through its conical surface, and directs it onto the grounds through the diffuser plate. This intermediary structure transforms the concentrated jet into a distributed flow pattern that enhances extraction efficiency without requiring complex multi-component systems
2Productivity
If high pressure is applied to compress grounds for better extraction, then essence extraction improves, but the brewing process becomes less controllable and may damage the grounds
Solution Approach 1:
The brewing process uses periodic action through the cyclic movement of the piston subassembly. The piston moves upward to compress the grounds, then stops to allow extraction, then moves downward to release pressure. This periodic compression and release cycle, controlled by the freely movable mass that responds to pressure differentials, provides controllable brewing conditions that enhance extraction while preventing ground damage
Solution Approach 2:
The system dynamically changes pressure parameters during the brewing process. The freely movable mass automatically adjusts the compression pressure based on the pressure differential between the lower and upper containers. When pressure in the lower container exceeds a threshold, the mass moves to allow fluid flow, thereby automatically regulating pressure to optimize extraction while maintaining process control
3Speed
If a nozzle with small orifice is used to create high velocity fluid flow, then fluid flow velocity increases for better extraction, but the flow area is limited and restricts overall fluid throughput
Solution Approach 1:
The invention merges two fluid delivery approaches: a central nozzle that provides high-velocity jet flow for penetrating the grounds, and a diffuser plate with multiple holes that provides additional fluid throughput. The frusto-conical diffuser combines these functions by receiving flow from the nozzle and distributing it through its conical surface and the diffuser plate holes, thereby achieving both high velocity and adequate throughput
Solution Approach 2:
The frusto-conical diffuser transitions the fluid flow from a one-dimensional jet (from the nozzle) to a two-dimensional distributed flow pattern. The conical surface of the diffuser expands the fluid flow radially outward, and the diffuser plate with multiple holes distributes it across a larger area. This dimensional transition maintains high velocity characteristics while significantly increasing the effective flow area and throughput
4Productivity
If the piston moves upward to compress grounds during brewing, then extraction efficiency improves, but the device complexity increases due to bearing structures and movable components
Solution Approach 1:
The freely movable mass within the frusto-conical diffuser provides self-service compression. As pressure in the lower container builds, the mass automatically moves in response to the pressure differential, causing the piston subassembly to rise and compress the grounds. This eliminates the need for external actuators, motors, or complex control mechanisms, maintaining device simplicity while achieving effective compression for enhanced extraction
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 brewer achieves improved extraction of essences by gradually increasing pressure and maintaining constant pressure to compress the grounds, resulting in a more efficient brewing process with higher essence extraction per unit volume, while also facilitating easy cleaning and reducing manufacturing costs.
Implementation Method 1
the frusto-conical cavity provides an expansion chamber for high pressure fluid that is introduced through the nozzle orifice at its lower end
Implementation Method 2
The orifice functions as a nozzle and leads to a tapered frusto-conical cavity
Implementation Method 3
the pressure piston subassembly to move upwardly within the cylinder and progressively compress the grounds
Implementation Method 4
as steam and superheated water from the lower container flow upward through the piston and through the coffee grounds
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A beverage brewing device includes a lower container for receiving and heating water, a connected upper container for receiving beverage, and a piston-cylinder assembly for receiving grounds, captured within the lower container. The piston-cylinder assembly includes a cylinder, a piston movable in the cylinder, a conical diffuser fixedly attached to the piston, and a freely movable, valve-seated mass disposed between the piston and the conical diffuser, at the entrance of an expansion chamber to operatively block a flow of fluid through a nozzle when the pressure of the fluid is insufficient to displace the weight of the mass. The piston and the conical diffuser define the expansion chamber therebetween. When water is heated, the lower container becomes pressurized sufficiently to pass through the nozzle and displace the seated mass from the valve seat, such that the water passes through the nozzle at relatively high pressure and velocity, to enter the expansion chamber at lowered pressure. It then flows through a diffuser plate, through the grounds, and into an upper chamber.