Self-Cleaning Drip Emitter Inlet Filter for Clog Resistance
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Solution Overview
Problem
Drip emitters in irrigation systems are prone to clogging due to debris accumulation, leading to uneven water distribution and operational challenges, with existing filtration systems being costly and difficult to maintain.
Innovation Solution
A clog-resistant drip emitter design featuring a moveable inlet filter that deflects inward upon pressure drop to eject debris, preventing clogs and extending the emitter's operational life without the need for costly filtration systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large serviceable filtration systems are installed to filter water before it enters the dripline, then clogging is prevented, but the system becomes expensive to purchase and maintain
Solution Approach 1:
The filter element is designed to be self-cleaning through backflush operation. When the solenoid valve switches positions, water flows in reverse through the filter element, automatically removing accumulated debris without requiring manual intervention or complex external filtration systems.
Solution Approach 2:
The system performs periodic backflushing cycles to clean the filter element. The controller activates the solenoid valve at predetermined intervals to reverse water flow through the filter, eliminating debris accumulation before it causes clogging, thereby maintaining reliable operation without continuous manual maintenance.
2Reliability
If passive filters are designed at the inlet of each emitter to prevent grit entry, then clogging is reduced, but the filter itself clogs over time and cannot be serviced for inline emitters
Solution Approach 1:
The filter element automatically cleans itself through backflushing. When debris accumulates on the filter, the solenoid valve reverses water flow, which flushes the debris off the filter element and into the discharge line, eliminating the need for manual servicing even for inline emitters.
Solution Approach 2:
The system dynamically switches the flow direction through the filter element using the solenoid valve. During normal operation, water flows forward through the filter; during cleaning cycles, the valve reverses the flow to flush debris, allowing the filter to adapt between filtration and self-cleaning modes.
3Reliability
If the filter is cleaned or replaced manually, then clogs are removed, but the process is labor-intensive and costly
Solution Approach 1:
The system automatically performs filter cleaning through backflushing controlled by the solenoid valve and timer. Water flow is reversed through the filter element at predetermined intervals, automatically removing debris without requiring manual disassembly, cleaning, or replacement of the filter.
Solution Approach 2:
The controller schedules periodic backflushing operations to clean the filter element automatically. The solenoid valve switches positions at predetermined time intervals to reverse water flow through the filter, maintaining emitter functionality without manual intervention and eliminating labor-intensive maintenance.
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 moveable inlet filter automatically clears debris, ensuring consistent water flow and reducing maintenance costs by preventing emitter clogs, thus enhancing the reliability and longevity of the irrigation system.
Implementation Method 1
the inlet filter takes advantage of a pressure drop that occurs across the inlet filter when debris accumulates on the inlet filter to a certain level
Implementation Method 2
The inlet filter includes an elastomeric ring that deflects the plate inwardly into the emitter when the accumulated debris blocks a predetermined amount of water flow into the emitter
Data Source
AI summary
A drip emitter is provided having a clog-resistant, debris-clearing inlet filter. The emitter includes a moveable inlet that has an outer side exposed to the fluid in the supply tube, an inner side facing an interior of the emitter, and at least one inlet opening. In an operational state of the emitter, the moveable inlet moves from a first state to a second state as a result of debris at least partially blocking the at least one inlet opening. In the second state, at least some of the debris is cleared away from the inlet opening, resuming normal flow and causing the moveable inlet to move back towards the first state.