Flat Multi-Density Fluid Filter for Low Differential Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid filters, particularly those used in cooling systems and transmission systems of internal combustion engines, face challenges in achieving sufficient filtration efficiency while minimizing differential pressure, often requiring mechanical bypass valves which increase complexity and cost.
Innovation Solution
A filter system with a flat non-pleated filter element featuring at least two filtration areas of different densities, allowing fluid to pass through these areas in parallel, with one area having a high filtration density and the other a low filtration density, reducing differential pressure through dynamic fluid distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single high-density filtration area is used, then filtration efficiency is improved, but differential pressure increases
Solution Approach 1:
The filter element is divided into multiple filtration areas with different filtration densities. The first filtration area has a first filtration density and the second filtration area has a second filtration density that is different from the first. This segmentation allows the system to achieve high filtration efficiency through the high-density area while the low-density area provides a parallel flow path that reduces overall differential pressure.
Solution Approach 2:
Different regions of the filter element are assigned different local filtration properties. The first filtration area is designed with higher filtration density for areas requiring superior filtration, while the second filtration area has lower filtration density to facilitate easier fluid passage. This local quality differentiation resolves the contradiction by allowing high filtration efficiency in critical areas without forcing all fluid through high-density media.
2Stress or pressure
If mechanical bypass valves are added to reduce differential pressure, then differential pressure is reduced, but device complexity increases
Solution Approach 1:
The patent extracts the differential pressure reduction function from a separate mechanical bypass valve component and integrates it directly into the filter element structure itself. By incorporating multiple filtration areas with different densities within the filter element, the system achieves differential pressure reduction without requiring external bypass valves, thereby reducing device complexity while maintaining the pressure reduction benefit.
Solution Approach 2:
The filtration function and differential pressure regulation function are merged into a single integrated filter element structure. Instead of having separate components for filtration and pressure regulation, the patent combines these functions by creating a filter element with multiple filtration areas that simultaneously perform both filtration and differential pressure management, eliminating the need for additional mechanical bypass valves.
3Reliability
If multiple filtration areas with different densities are used, then both filtration efficiency and differential pressure reduction are achieved, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by varying the filtration density parameter across different areas of the filter element. The first filtration area uses a first filtration density while the second filtration area uses a second filtration density. This parameter variation can be achieved through manufacturing techniques such as varying fiber density, changing media thickness, or adjusting porosity in different regions, allowing the system to achieve both high filtration efficiency and differential pressure reduction while maintaining reasonable manufacturing feasibility.
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
This configuration achieves high filtration efficiency with reduced differential pressure, eliminating the need for mechanical bypass valves and optimizing space and cost considerations.
Implementation Method 1
a filter element having at least two filtration areas of different filtration densities, the fluid flow passing the at least two filtration areas in parallel
Data Source
AI summary
A filter system for filtering fluids includes a housing, a fluid inlet formed in a first housing part, a fluid outlet formed in a second housing part, a flat non-serviceable filter element operably accommodated in the housing, wherein a fluid flow passes transversely through the filter element from the fluid inlet to the fluid outlet. The filter element has at least two filtration areas of different filtration densities including a first filter medium having a high filtration density and a second filter medium having a low filtration density, wherein the fluid flow passes the at least two filtration areas in parallel.