Alternating Filter Back-Flushing via Distribution Valve

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Solution Overview

Problem

Fluid filtering systems, especially those handling hazardous materials, face challenges with clogging and cleaning, which are difficult and hazardous, necessitating more efficient and safer solutions.

Innovation Solution

The implementation of an automatic back-flushing filtering system with a distribution valve that alternates between two filters, allowing one to filter fluid while the other is back-flushed, minimizing clogging and human intervention, and capable of operating without electricity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single filter is used in the fluid filtering system, then the system structure is simple, but the filter becomes clogged and requires frequent manual cleaning

Engineering Contradiction:

Improvesystem structureVSAvoidfilter clogging

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The filtering system is divided into multiple filter elements (first filter and second filter) that operate in alternating cycles. While one filter is performing filtration, the other is being back-flushed, thereby segmenting the filtration function to prevent clogging of the active filter while maintaining system simplicity through modular design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system implements periodic back-flushing cycles where filters are alternately flushed at predetermined intervals during operation. This periodic action prevents accumulation of contaminants and maintains filtration efficiency without requiring continuous manual intervention, resolving the contradiction between simple structure and reliability.

Inventive Principle:

Principle #19Periodic action

2Reliability

If manual filter cleaning is performed, then the filter can be restored to peak performance, but human exposure to hazardous materials increases

Engineering Contradiction:

Improvefilter performanceVSAvoidhuman exposure to hazardous materials

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system performs automatic back-flushing of filters using its own operational fluid flow, eliminating the need for manual cleaning intervention. The first filter back-flushes the second filter and vice versa during alternating cycles, allowing the system to self-maintain peak performance while completely preventing human exposure to hazardous materials in the fluid stream.

Inventive Principle:

Principle #25Self-service

3Object-affected harmful factors

If automatic back-flushing is implemented, then human exposure to hazardous materials is minimized, but the device complexity increases

Engineering Contradiction:

Improvehuman exposure to hazardous materialsVSAvoidsystem structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The back-flushing function is merged with the normal filtration operation by using the same fluid distribution valve and outlet structure. The system combines filtration and back-flushing into a single integrated操作流程, where the distribution valve directs fluid to different outlets depending on the cycle phase, avoiding the need for separate complex flushing mechanisms and minimizing device complexity while achieving automatic operation.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If multiple filters are used for alternating back-flushing, then filter clogging is reduced, but the use of energy increases

Engineering Contradiction:

Improvefilter cloggingVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system uses hydraulic principles where the fluid pressure and flow from normal operation are redirected to perform back-flushing. The distribution valve redirects the existing fluid stream to flush the alternate filter, utilizing the system's own hydraulic energy without requiring additional power sources or energy-intensive pumping mechanisms, thereby maintaining low energy consumption while reducing clogging.

Inventive Principle:

Principle #29Pneumatics and hydraulics

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

This approach reduces clogging and human exposure to hazardous materials, maintaining peak performance with minimal maintenance and ensuring safe handling of potentially hazardous fluids.

Implementation Method 1

a distribution valve operable to direct a received fluid stream to first and second outlets during respective first and second cycles

Methodology Applied

Scientific EffectFluid flow direction control:

Implementation Method 2

A filtering system filters at least some fluid output from the first outlet of the distribution valve during the first cycle with a first filter

Methodology Applied

Scientific EffectPhysical filtration: Filter (physical)

Implementation Method 3

while back-flushing a second filter

Methodology Applied

Scientific EffectBack-flushing:

Data Source

PatentUS7879248B2Filtering systems with integral filter back-flushing

Publication Date: 2011.02.01 SVETLIK III RUDY JAMES

AI summary

A filter system includes a distribution valve operable to direct a received fluid stream to first and second outlets during respective first and second cycles. A filtering system filters at least some fluid output from the first outlet of the distribution valve during the first cycle with a first filter while back-flushing a second filter and filters at least some fluid output from the second outlet of the distribution valve during the second cycle with the second filter while back-flushing the first filter.