Multi-Level Filter Plug for Coffee Machine Limescale Control
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Solution Overview
Problem
Fully automatic coffee machines face issues with limescale buildup in the heating device, leading to clogged valves and fluid system impairment, which is exacerbated by the need for a compact filter plug design that balances heat transfer efficiency with minimal installation space and reduced heat loss.
Innovation Solution
A filter plug with two solid cylindrical bodies of different diameters, each with axial openings, allowing for limescale filtration at multiple levels, ensuring continued fluid passage even if one level becomes clogged, and incorporating a splined profile for additional filtration, minimizing the risk of system-wide clogging and maintaining compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If numerous openings are made in the cylindrical shell to improve filtration, then the limescale trap becomes more effective, but the length of the limescale trap increases leading to larger installation space and heat losses
Solution Approach 1:
The filter plug is divided into multiple cylindrical bodies (first, second, and optionally third cylindrical bodies) with different diameters, each having openings at different levels. This segmentation allows filtration to occur at multiple discrete locations along the flow path, providing redundant filtration capability without requiring a single long trap structure.
Solution Approach 2:
The invention transitions from a single-level filtration approach to multi-level filtration by arranging openings at different axial positions and different radial dimensions (different diameters). This dimensional arrangement allows the filter to capture limescale particles at multiple stages simultaneously, reducing the need for extended trap length.
2Reliability
If the cylindrical shell is made longer to accommodate more openings for better filtration, then limescale trapping improves, but the installation space and heat losses increase
Solution Approach 1:
The filter plug segments the filtration function across multiple cylindrical bodies of different diameters, each contributing to limescale trapping. This segmentation enables effective filtration in a more compact axial arrangement, reducing the overall length of unheated hose and minimizing heat losses in the fluid system.
Solution Approach 2:
The invention changes the parameter of cylindrical body diameter across different sections (first, second, third cylindrical bodies have different diameters). This parameter variation allows optimization of filtration surface area and opening distribution without proportionally increasing the axial length, thereby reducing heat losses while maintaining trapping capability.
3Device complexity
If a single level of openings is used in the filter plug, then the structure is simple, but the fluid system clogs quickly due to limescale deposits
Solution Approach 1:
The filter plug is segmented into multiple cylindrical bodies with openings at different levels and different diameters. This segmentation creates multiple independent filtration pathways, so if one level becomes clogged with limescale, fluid can still pass through other levels, maintaining system reliability without significantly increasing structural complexity.
Solution Approach 2:
The multi-level opening arrangement provides a backup filtration path before complete clogging occurs. When limescale deposits block openings at one level, the system automatically redirects flow to openings at other levels, cushioning against total system failure and extending operational intervals between maintenance.
4Length of stationary object
If the filter plug is made compact to reduce installation space, then heat losses are minimized, but the filtration capability may be compromised
Solution Approach 1:
The compact filter plug achieves effective filtration by segmenting the structure into multiple cylindrical bodies with different diameters, each contributing to the overall filtration capability. This segmentation allows the filter to maintain substantial filtration surface area and multi-level opening distribution within a compact axial footprint, preserving filtration capability while minimizing installation space.
Solution Approach 2:
The filter plug employs a nested arrangement where cylindrical bodies of different diameters are positioned concentrically or in stepped configuration. This nesting allows multiple filtration surfaces to be packed into a compact overall dimension, maintaining filtration capability while reducing the axial length and installation space requirement.
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 solution effectively delays fluid system clogging, reduces installation space requirements, minimizes heat loss, and maintains functionality by allowing water to pass through alternate filtration levels, enabling compact and cost-effective heating systems.
Implementation Method 1
a filter plug (100) for pipelines (5a, 5b) in a beverage vending machine, in particular a fully automatic coffee machine, with at least one first cylindrical solid body (10a) and one second cylindrical solid body (10b), wherein the first cylindrical solid body (10a) and the second cylindrical solid body (10b) have different diameters, wherein each has a plurality of axial openings (1a, 1b)
Data Source
Figure 1~2
Figure 3a~3b
Figure 3c~3d
AI summary
A filter plug (100) for pipes (5a) is specified, which is intended for use in a drinks machine, in particular a fully automatic coffee machine, and which has at least a first solid cylindrical body (10a) and a second solid cylindrical body (10b). The solid bodies (10a, 10b) have different diameters, the first cylindrical solid body (10a) and the second cylindrical solid body (10b) each having a plurality of axial openings (1a, 1b). A beverage dispenser with such a filter plug (100) is also specified.