Composite Filter Cartridge with Nested Pressure Tank
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Solution Overview
Problem
Existing water purifiers have complex systems with inconsistent service lives for filtering materials, leading to high maintenance costs and user inconvenience, and they often have low water flux and limited yield, causing issues with water storage and kitchen space usage.
Innovation Solution
A composite filter-cartridge assembly with a pretreatment filter, fine filtration filter, and activated carbon filter, designed to filter water sequentially and protect the activated carbon, reducing the volume and maintenance complexity, while ensuring consistent service lives and high water flux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple filter cartridges with different service lives are used in series, then water purification effectiveness is improved, but replacement frequency and maintenance complexity increase
Solution Approach 1:
The patent combines multiple filter cartridges with different service lives (PP cotton filter, activated carbon filter, RO membrane filter) into a single integrated filter assembly. This allows all filters to be replaced simultaneously as one unit, eliminating the need to track and replace individual filters at different intervals, thus resolving the contradiction between maintaining effective water purification and reducing maintenance complexity.
2Reliability
If traditional multi-stage filter cartridges are used, then water purification is achieved, but system complexity and water leakage risk increase
Solution Approach 1:
The patent integrates multiple filtration stages into a single filter assembly with unified internal piping. The PP cotton filter, activated carbon filter, and RO membrane filter are arranged in series within one housing with internal water channels, eliminating the need for multiple external connections and joints. This reduces system complexity and water leakage risk while maintaining effective water purification.
3Volume of moving object
If small flux water purifiers are used, then equipment size is reduced, but water yield and storage capacity are limited
Solution Approach 1:
The patent places the pressure tank inside the filter assembly housing, nesting the water storage function within the filtration structure. This allows the system to provide both high water yield through the pressure tank and compact equipment size by utilizing internal space efficiently, resolving the contradiction between small equipment footprint and adequate water storage capacity.
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 composite filter-cartridge assembly provides a compact, efficient water purification system with consistent filter life, reduced maintenance, and increased water yield, enhancing user convenience and kitchen space utilization.
Implementation Method 1
a fine filtration membrane is fitted over an outside of the first water collecting pipe and covers the plurality of water collecting holes
Implementation Method 2
an activated carbon filter-cartridge, wherein the activated carbon filter-cartridge is disposed inside the first water collecting pipe; the activated carbon is disposed inside the second water collecting pipe
Implementation Method 3
RO membrane (RO is an abbreviation of reverse osmosis, and RO membrane is a reverse osmosis membrane, a pore size of which is as small as a nanometer level. Under a certain pressure, water molecules can pass through the RO membrane, but inorganic salts, heavy metal ions, organic matters, colloids, bacteria, viruses and other impurities cannot pass through the RO membrane)
Data Source
AI summary
A composite filter-cartridge, a composite filter-cartridge assembly for a water purifier and a water purifier are provided. The composite filter-cartridge includes a pretreatment filter-cartridge, a fine filtration filter-cartridge and an activated carbon filter-cartridge arranged sequentially from outside to inside. The fine filtration filter-cartridge includes a first water collecting pipe and a fine filtration membrane. The activated carbon filter-cartridge includes: a second water collecting pipe, an outer circumferential wall of the second water collecting pipe except a lower end thereof and an inner circumferential wall of the first water collecting pipe being spaced apart from each other; and a activated carbon, lower ends of the activated carbon and the second water collecting pipe being in sealed connection, a water outlet hole being formed in the activated carbon and penetrating the activated carbon axially, and an upper end of the water outlet hole being closed.