Coffee Brewing Unit With Telescopic Piston Mode Switching

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Solution Overview

Problem

Existing espresso and fresh-brew coffee brewing units are complex and expensive due to the use of adjustable-flow pumps and valve mechanisms, making them difficult to produce and maintain.

Innovation Solution

A brewing unit design featuring a constant-frequency electromagnetic pump, solenoid valves, and a telescopic compression piston to create an adjustable brewing chamber, allowing for efficient selection between espresso and fresh-brew coffee production without the need for complex pressure-based valve systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an adjustable-flow pump with valve means is used to select between espresso and fresh-brew modes, then the brewing unit can achieve different coffee types, but the device complexity and production cost increase

Engineering Contradiction:

Improvecoffee type selectionVSAvoidpump and valve system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The brewing unit is divided into separate dedicated systems: a first pump dedicated to espresso brewing and a second pump dedicated to fresh-brew brewing. Each pump has its own dedicated outlet conduit, eliminating the need for complex valve switching mechanisms while maintaining the ability to produce different coffee types.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The control unit serves multiple functions by selectively activating either the first pump or the second pump based on the selected coffee type. This multi-functional approach allows a single control system to manage both espresso and fresh-brew brewing modes without requiring separate control mechanisms for each pump.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If an adjustable-flow pump is used to control water flow for different coffee types, then brewing flexibility is achieved, but manufacturing cost increases

Engineering Contradiction:

Improvebrewing mode selectionVSAvoidproduction cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Instead of using a single adjustable-flow pump, the system segments the pumping function into two separate fixed-flow pumps. This segmentation simplifies the manufacturing of each individual pump while achieving the same brewing flexibility through selective activation, thereby reducing overall production cost.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention replaces expensive adjustable-flow pumps with simpler, cheaper fixed-flow pumps. While the simpler pumps have limited functionality on their own, the combination of multiple simple pumps controlled by a microprocessor achieves the desired versatility at lower manufacturing cost.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Adaptability or versatility

If valve means are added to select outlet conduits based on pressure values, then coffee type selection is enabled, but the device becomes more complex and difficult to produce

Engineering Contradiction:

Improveoutlet conduit selectionVSAvoidvalve mechanism production

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The invention extracts and removes the complex valve switching mechanism from the system. Instead of using valves to switch between outlet conduits, each pump has its own dedicated outlet conduit that is always connected and ready for use. The selection of coffee type is achieved by activating the appropriate pump rather than by switching conduits.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using a single pump with valve switching to select between different outlet conduits, the invention inverts the approach by using multiple dedicated pumps with dedicated conduits. The selection mechanism is moved from the hydraulic system (valves) to the control system (microprocessor selecting which pump to activate).

Inventive Principle:

Principle #13The other way round (Inversion)

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 design simplifies the production process, reduces costs, and effectively switches between espresso and fresh-brew coffee modes using a more straightforward and cost-effective mechanism, improving the brewing unit's overall efficiency and ease of use.

Implementation Method 1

a pump for feeding water to the brewing assembly

Methodology Applied

Scientific EffectElectromagnetic pump: Electromagnetic Propulsion

Implementation Method 2

solenoid valves

Methodology Applied

Scientific EffectSolenoid: Solenoid

Data Source

PatentUS10226151B2Espresso and fresh-brew coffee brewing unit

Publication Date: 2019.03.12 N& W GLOBAL VENDING

AI summary

A brewing unit for making espresso (ES) and fresh-brew (FB) coffee, wherein the brewing chamber of a brewing assembly is supplied with water by a constant-frequency pump, and communicates with a first ES coffee outlet conduit, controlled by a calibrated valve, and a second FB coffee outlet conduit via a three-way COV (contact-operated) switch valve, which is formed in a compression piston for closing the brewing chamber, and is designed to be set to a normal open position, in which the first and second outlet conduit and a delivery manifold communicate with one another, and to switch, in use and in opposition to a spring, to a closed position, in which the second outlet conduit is closed, and the first outlet conduit communicates with the delivery manifold.