Filter assembly and cleaner having the same
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Solution Overview
Problem
Existing air intake pipes in water filtration cleaners, whether constant or convergent in cross section, face issues such as poor dust-water mixing, high energy consumption, and noise due to violent gas-liquid interactions, and are prone to blockages and noise from bubble breakage.
Innovation Solution
A filter assembly with an air intake pipe having a divergent cross-sectional area along the flow direction, a submerged and inclined air output end with a flat or wavy pipe mouth, and an axisymmetric shape to reduce flow velocity, increase mixing time and contact area, and minimize noise and splashing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a constant cross-section air intake pipe is used, then the structure is simple, but dust-laden bubbles equal to the cross section size are introduced into water, making mixing difficult and filtration效果 poor
Solution Approach 1:
The patent changes the cross-sectional area parameter of the air intake pipe from constant to variable, specifically designing it to gradually decrease along the flow direction. This parameter change allows bubbles to be progressively compressed and broken into smaller sizes, significantly improving dust-water mixing effect and filtration performance while maintaining manufacturing feasibility through standard pipe bending processes
2Ease of manufacture
If a non-constant cross section air intake pipe with simple stamping process is used, then manufacturing is easier, but cross-sectional flow area varies unevenly, causing great flow loss and increased energy consumption
Solution Approach 1:
The patent optimizes the cross-sectional area variation parameter to change gradually and uniformly along the flow direction, avoiding sudden changes that cause turbulence and flow loss. This controlled parameter change maintains smooth airflow, reduces energy consumption, and can be achieved through standard pipe bending without complex stamping processes
Solution Approach 2:
Instead of stamping the pipe mouth into a flat shape which causes uneven flow area variation, the patent inverts the approach by gradually bending the entire pipe to achieve a tapered cross-section. This inversion of the manufacturing method produces more uniform flow area changes and reduces flow loss compared to localized stamping
3Speed
If a circular pipe with convergent cross section is used, then flow area decreases evenly, but large-particle garbage blocks the air intake pipe
Solution Approach 1:
The patent introduces asymmetry in the pipe cross-section by designing an oval or rectangular shape instead of a circular one, with one dimension decreasing more gradually than the other. This asymmetric design allows the larger dimension to accommodate large-particle garbage while the smaller dimension provides sufficient flow area reduction for bubble breaking, preventing blockages while maintaining flow control
4Device complexity
If constant or convergent cross section air intake pipes are used, then structure is simple, but violent impact of air on water causes large noise and influences water-air separation
Solution Approach 1:
The patent changes the cross-sectional area parameter to decrease gradually along the flow direction, which progressively reduces air velocity and kinetic energy before water entry. This controlled parameter change softens the air-water impact, significantly reducing noise from bubble breakage and improving water-air separation efficiency while maintaining a relatively simple tapered pipe structure
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
Enhances dust filtration efficiency, reduces energy consumption, suppresses noise, and facilitates effective gas-liquid separation by increasing the mixing time and contact area of dust-laden air with water, while minimizing the splashing height and blockages.
Implementation Method 1
having a cross sectional area gradually increased along a fluid flow direction inside the air intake pipe
Implementation Method 2
an air output end located in the tank and extending towards the liquid or submerged in the liquid
Data Source
AI summary
A filter assembly (100) and a cleaner having the same are provided. The filter assembly (100) includes a tank (1) and an air intake pipe (2). The tank (1) is configured to accommodate a liquid therein and has an air inlet (13) and an air outlet (14). The air intake pipe (2) is connected to the air inlet, has an air output end (22) located in the tank (1) and extending towards the liquid (A) or submerged in the liquid (A), and has a cross sectional area gradually increased along a fluid flow direction inside the air intake pipe (2).