Water Filter Cartridge Structure for PFAS and Heavy Metal Removal
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Solution Overview
Problem
Existing water filtration devices face issues with high costs due to consumable filter elements and limited service life, particularly when dealing with contaminants like heavy metals and PFAS, which can damage health if not effectively filtered.
Innovation Solution
A water filtration device design featuring a filter element with a stacked porous sheet or pleated membrane filter wall, activated carbon filter rod, and bent porous hollow tubes, along with a waterproof and water-blocking structure, to enhance filtration area and efficiency, and prevent impurity accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If traditional filter elements are used, then initial filtration function is achieved, but service life is limited and replacement costs are high
Solution Approach 1:
The filter element is divided into multiple functional zones: a filter wall with stacked porous sheets for coarse filtration, a filter rod with activated carbon for adsorption, and a filter cartridge with bent porous hollow tubes for fine filtration. Each zone handles different types of contaminants and operates independently, allowing the system to maintain overall filtration efficiency even when individual components become saturated.
Solution Approach 2:
Different materials and structures are applied to different parts of the filter element. The filter wall uses stacked porous sheets with specific pore sizes for coarse filtration, the filter rod uses activated carbon for adsorption of organic pollutants, and the filter cartridge uses bent porous hollow tubes for fine filtration. This localized optimization allows each component to excel at its specific function while extending overall service life.
2Productivity
If filter area is increased to improve filtration efficiency, then device complexity increases
Solution Approach 1:
The filter wall employs stacked porous sheets arranged in multiple layers, transforming a two-dimensional filtration surface into a three-dimensional filtration volume. This vertical stacking dramatically increases the total filtration area without expanding the horizontal footprint of the device, thereby improving filtration efficiency while maintaining a compact structure.
Solution Approach 2:
The filter rod containing activated carbon is positioned centrally within the filter cartridge, which itself is housed within the filter wall assembly. This nested arrangement allows multiple filtration components to occupy overlapping spatial volumes, maximizing the use of internal space and increasing overall filtration capacity without proportionally increasing device external dimensions.
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 significantly prolongs the service life of the filtration device by maintaining filtration efficiency and effectively removing impurities, including heavy metals and PFAS, even after long-term use.
Implementation Method 1
the filter wall comprises stacked multiple porous sheets or a pleated porous membrane
Implementation Method 2
the filter rod comprises activated carbon
Implementation Method 3
the filter body comprises multiple bent porous hollow tubes
Data Source
Figure 1
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Figure 3
AI summary
Provided is a water filtration device which comprises a filter element (13), the filter element (13) comprises a filter cartridge (132), and the filter cartridge (132) comprises a filter body (1320), a waterproof wall (1321) and a water-blocking body (1322); wherein the filter body (1320) comprises multiple bent porous hollow tubes (1324), each of which has a bent end (1325) and an opening end (1326) opposite to each other with the opening end (1326) set toward the outlet tube (133), the waterproof wall (1321) surrounds the filter body (1320), the water-blocking body (1322) surrounds and fixes the opening ends (1326) of the bent porous hollow tubes (1324), and the water-blocking body (1322) has an outer peripheral surface connected to the waterproof wall (1321). The water filtration device of the present invention has excellent heavy metal and per- and poly-fluoroalkyl substances reduction capability, and a prolonged service life.