Self-Cleaning Inline Filter With Counter-Current Debris Removal
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Solution Overview
Problem
Existing self-cleaning filters are complex and expensive to produce and maintain, lacking simple and cost-effective mechanisms for periodic cleaning without disrupting fluid flow.
Innovation Solution
A filter assembly with a reconfigurable design featuring an upper and lower chamber, a static filter, a movable filter, a debris trap, and a pressure source for counter-current fluid flow to dislodge debris, along with pressure sensors and a controller for automatic state transitions, allowing for efficient self-cleaning without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reverse flushing with a cleaning nozzle is used to clean the filter surface, then the filter can be cleaned periodically, but the device becomes complicated and expensive to produce and maintain
Solution Approach 1:
The invention extracts the cleaning function from a complex mechanical nozzle system and implements it through a simple movable filter element that is displaced by pressure differential. The cleaning action is achieved by removing the filter element rather than using a complex cleaning mechanism, thereby reducing device complexity while maintaining cleaning capability.
Solution Approach 2:
The filter assembly cleans itself through the automatic displacement of the movable filter element by counter-current fluid flow. The system requires no external cleaning mechanisms, motors, or complex control systems - the fluid pressure itself drives the cleaning process, making the system self-service and significantly simpler.
2Reliability
If multiple filters with valve control arrangements are used for self-cleaning, then filters can be flushed by reverse flow, but the arrangement becomes complicated and expensive
Solution Approach 1:
The invention merges the filtering and cleaning functions into a single integrated filter assembly. Instead of using separate filters with valve controls, the movable filter element serves both as the filtering medium and the cleaning mechanism, eliminating the need for complex valve arrangements while maintaining flushing capability.
Solution Approach 2:
The movable filter element performs multiple functions: it acts as the filtering medium during normal operation and as the cleaning element during reverse flushing. This multi-functionality eliminates the need for separate cleaning components and valve controls, reducing overall device complexity.
3Reliability
If a movable filter is displaced to enable cleaning, then debris can be dislodged and trapped, but the filter assembly must be reconfigurable between normal and activated states
Solution Approach 1:
The invention uses fluid pressure (pneumatic or hydraulic) to automatically displace the movable filter element between its filtering position and its cleaning position. This automatic displacement driven by fluid pressure eliminates the need for mechanical linkages, motors, or complex control mechanisms, thereby reducing device complexity while enabling effective debris removal.
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 solution enables simple, cost-effective self-cleaning of filters by automatically reconfiguring the filter assembly to dislodge debris using counter-current fluid flow, extending maintenance intervals and reducing susceptibility to blockages, while minimizing material usage and manufacturing costs.
Implementation Method 1
a pressure source, configured to selectively introduce a second fluid, which may or may not comprise the same compound, mixture, or solution as the first fluid, into the lower chamber, and thereby cause the second fluid to flow through the filter body counter-currently relative to the first fluid
Implementation Method 2
the counter-current flow of the second fluid causes the movable filter to move from the first position to the second position
Implementation Method 3
causes at least a portion of any debris present in at least one of the static filter and the movable filter to be dislodged
Data Source
AI summary
Self-cleaning inline filters that utilize sensors to measure pressure differential and activate a self-cleaning mode are disclosed. In the self-cleaning mode, the self-cleaning inline filters of the present disclosure utilize back, reverse, and/or counter-current fluid flow to separate two filter elements. The back, reverse, and/or counter-current fluid flow also flushes particulates out of the filter, such that the particulates are captured by a mechanical trap.