Composite Filter with Independent Axial Flow Paths
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Solution Overview
Problem
Existing composite filters face challenges in assembly complexity, flow path narrowing, and limited size minimization due to the lack of a single structure for fixing filters and independent flow paths.
Innovation Solution
A composite filter design that stacks an upper filter and a lower filter in the up-down direction inside a housing body, with independent flow paths connected through a connection tube, allowing for easy assembly and size minimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple filters are stacked vertically in a composite filter, then the layout complexity and volume occupied by filters are reduced, but the assembly complexity increases due to lack of a single structure for fixing filters
Solution Approach 1:
The patent combines multiple fixing functions into a single integrated mounting head structure. The mounting head includes a first mounting portion for the first filter and a second mounting portion for the second filter, allowing both filters to be fixed simultaneously through one component rather than separate fixing mechanisms, thereby reducing assembly complexity while maintaining compact vertical stacking
2Reliability
If both flow paths are formed on the outside of the first filter, then the flow path isolation is achieved, but the radial width of each flow path is narrowed, making fluid flow not smooth
Solution Approach 1:
The patent transitions from radial flow paths to axial flow paths by directing water flow in the vertical direction through the filters. The first flow path flows water from the first raw water inlet through the first filter to the first purified water outlet, and the second flow path flows water from the second raw water inlet through the second filter to the second purified water outlet, both in the axial direction. This dimensional change eliminates radial width constraints while maintaining flow path isolation
3Reliability
If both filters are required to form flow path inside the case, then the flow path structure is complete, but the first filter or second filter cannot be selectively installed and used
Solution Approach 1:
The patent segments the composite filter into independently replaceable filter elements (first filter and second filter) with dedicated mounting portions in the mounting head. Each filter can be independently removed and replaced without affecting the other filter or the overall flow path structure, enabling selective installation and use of different filter types or configurations
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 enables smooth fluid flow by widening the flow paths and allows for easy assembly and size minimization, while also enabling the use of additional filters and independent operation of filter structures.
Implementation Method 1
a first filter and a second filter which are different from each other, in a case
Data Source
AI summary
A composite filter and a water purifier having the composite filter are provided. The composite filter includes: a cover cap in which a first inner space is formed; a lower filter structure including a lower filter; a connection tube in which a first connection tube space and a second connection tube space are formed; a housing body in which a second inner space is formed; an upper filter structure which divides the second inner space into a first housing body space and a second housing body space and includes an upper filter; and a housing head including a first water inlet port, a first water outlet port, a second water inlet port, and a second water outlet port.