Multi-Layer Porous Filter with Compression Self-Cleaning
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Solution Overview
Problem
Conventional filtration methods face issues with clogged filters due to residue accumulation, requiring frequent washing and additional equipment, leading to short operating lifespan and increased energy consumption.
Innovation Solution
A multi-layer filter structure comprising a porous filter film with smaller holes and a water-absorbing film with larger holes, where the water-absorbing film compresses to drain liquid and rinse the filter, reducing residue blockage and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a filter with smaller holes is used to intercept larger solids, then the separation efficiency is improved, but the filter holes are easily blocked by separated solids, reducing operating lifespan
Solution Approach 1:
The filter is divided into multiple layers with different hole sizes. The first layer has larger holes that prevent clogging, while the second layer has smaller holes that provide fine separation. This segmentation allows each layer to perform its specific function without interfering with the other, resolving the contradiction between separation efficiency and operating lifespan.
Solution Approach 2:
The first porous film acts as an intermediary layer between the mixed solution and the second porous film. It pre-filters the solution by intercepting large solids before they reach the second film with smaller holes, preventing clogging of the fine filtration layer while maintaining high separation efficiency.
2Reliability
If the filter holes are washed to remove blocked residue, then the filtering ability is refreshed, but additional equipment and process are required, increasing operating costs
Solution Approach 1:
Instead of washing the filter from the normal filtration direction, the patent inverts the filtration direction for cleaning. Liquid is introduced from the bottom side of the second porous film, flowing upward to rinse and remove blocked residue from the filter holes, eliminating the need for additional washing equipment and processes.
Solution Approach 2:
The filter structure enables self-cleaning by using the filtration system itself to remove blocked residue. The inverted filtration process allows the filter to clean itself without external washing equipment, reducing device complexity and operating costs while maintaining reliable filtering ability.
3Productivity
If a high speed-rotating pump is used to produce compressing or vacuuming process, then the filtering speed is increased, but more energy is consumed, increasing operating costs
Solution Approach 1:
The patent replaces the mechanical pumping system with a capillary force-based filtration system. The porous films with specific pore sizes and surface properties generate capillary forces that drive liquid through the filter without requiring high-speed rotating pumps, significantly reducing energy consumption while maintaining high filtering speed.
Solution Approach 2:
The patent changes the physical parameters of the filtration system by using porous films with specific pore diameter ranges (first holes: 0.003-0.457 cm, second holes: 0.0003-0.003 cm) and controlling surface tension properties. These parameter changes enable capillary-driven flow that achieves high filtering speed without mechanical pumping, reducing energy consumption.
4Duration of action of stationary object
If the first porous film and water-absorbing film compress to drain liquid and rinse the second porous film, then residue blockage is removed, but compressing force is required
Solution Approach 1:
The patent employs periodic compression and decompression cycles of the porous films. During compression, liquid is drained and residue is removed from the second porous film. During decompression, the films return to their original state, ready for the next filtration cycle. This periodic action extends operating lifespan by preventing permanent blockage.
Solution Approach 2:
The compression process discards accumulated residue and liquid from the filter system, while the decompression process recovers the filter's original structure and filtration capacity. This discarding and recovering cycle maintains long-term filter performance by continuously removing blockages without permanent damage.
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 filter structure achieves efficient separation with extended lifespan and reduced power consumption by using capillary forces and gravity to enhance filtration speed and prevent clogging, eliminating the need for high-speed pumps.
Implementation Method 1
using capillary forces and gravity to enhance filtration speed
Implementation Method 2
compressing the first porous film and the film capable of absorbing water by a compressing force to drain out the liquid
Implementation Method 3
A filter having smaller holes is used to intercept larger solids. The smaller solid and liquid particles pass through the holes.
Implementation Method 4
using capillary forces and gravity to enhance filtration speed
Data Source
AI summary
Embodiments of the disclosure provide a filter structure. A second porous film having a plurality of second holes is disposed on a first porous film having a plurality of first holes. The second holes are smaller than the first holes. The filter structure is dried by an easy and power-saving method such as compression.