Filter arrangement including prefiltration filter element and filter device
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Solution Overview
Problem
Existing filter devices face challenges in increasing dirt holding capacity without increasing cost or footprint, and in efficiently removing undesirable materials from fluids in point-of-use applications.
Innovation Solution
A filter device comprising a hollow cylindrical porous host filter with a compression-fitted porous fibrous prefiltration element, which covers the outer surface of the host filter, enhancing the filter's dirt holding capacity and efficiency in removing undesirable materials from fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the amount of filter material is increased to increase dirt holding capacity, then the dirt holding capacity is improved, but the cost increases and the footprint becomes undesirably large
Solution Approach 1:
The prefiltration filter element is disposed around the outer periphery of the host filter element, creating a nested configuration where the prefiltration layer surrounds the main filter. This nesting approach increases the total filtration capacity without proportionally increasing the footprint, as the prefiltration element utilizes the annular space around the host filter rather than requiring additional linear space.
Solution Approach 2:
The invention transitions from a single-layer planar filtration approach to a multi-dimensional nested structure. By adding the prefiltration element in the radial dimension around the host filter, the system increases dirt holding capacity through volumetric utilization rather than simply expanding the planar footprint, effectively adding another dimension to the filtration architecture.
2Quantity of substance
If the amount of filter material is increased to increase dirt holding capacity, then the dirt holding capacity is improved, but the cost increases
Solution Approach 1:
The filtration system is segmented into two distinct functional elements: a host filter element for primary filtration and a prefiltration filter element for preliminary filtering. This segmentation allows each element to be optimized for its specific function and replaced independently, reducing overall cost by allowing selective replacement of only the prefiltration element when it becomes saturated, rather than replacing an entire larger filter assembly.
Solution Approach 2:
The prefiltration filter element is designed as a lower-cost, sacrificial component that captures larger particles and contaminants before they reach the more expensive host filter. By positioning this cheaper element as the first line of defense, the system extends the life of the host filter and reduces overall operating costs, as the prefiltration element can be replaced more economically and less frequently than a complete filter assembly.
3Device complexity
If a single filter element is used, then the device complexity is low, but the filtration efficiency for different particle sizes is insufficient
Solution Approach 1:
The filter system is divided into two specialized elements: the host filter element for capturing finer particles and the prefiltration element for larger contaminants. This segmentation enables each element to be optimized for its specific particle size range, improving overall filtration efficiency without requiring a single complex multi-functional filter. The segmented design maintains relative simplicity while achieving superior performance.
Solution Approach 2:
Different regions of the filtration system are assigned different functional qualities: the prefiltration element is optimized for capturing larger particles with coarser filtration characteristics, while the host filter element is optimized for finer particle capture with denser filtration characteristics. This local differentiation of quality allows each element to perform its specific function efficiently, achieving high overall filtration efficiency without uniform complexity throughout the system.
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 prefiltration filter element significantly increases the life and dirt holding capacity of the host filter, reduces pressure drop, and maintains high filtration efficiency with minimal cost, ensuring sterile water dispensing in point-of-use applications.
Implementation Method 1
A filter arrangement comprising a host filter and a prefiltration filter element... such that undesirable material is removed from fluid as the fluid passes through the filter device
Data Source
Figure 1A~1E
Figure 2A
Figure 2B
AI summary
A filter arrangement including a host filter and a prefiltration filter element, a filter device including the filter arrangement, and a method of processing fluid by passing it through the filter arrangement, are disclosed.