Drip Emitter With Pressure Compensation and Copper Root Barrier
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Solution Overview
Problem
Subsurface drip irrigation emitters face issues with fluctuating water pressure leading to inefficient water use and potential obstruction from debris and plant roots, requiring a solution for consistent water output and effective root prevention without harming the environment.
Innovation Solution
The design incorporates a tortuous path flow channel and a pressure compensation mechanism with a second inlet to maintain constant water output, along with a copper member at the emitter outlet to prevent root intrusion, using a non-corrosive and environmentally friendly approach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If subsurface drip emitters are used to prevent water loss and improve irrigation efficiency, then water conservation is improved, but the emitters are prone to obstruction from debris and particulate matter
Solution Approach 1:
The patent incorporates a filter screen at the emitter inlet that pre-filters debris and particulate matter from the irrigation water before it enters the flow passage. This preliminary filtering action prevents obstruction of the emitter outlet, ensuring reliable operation while maintaining the water conservation benefits of subsurface drip irrigation.
2Device complexity
If conventional emitters are used without pressure compensation, then device complexity is reduced, but water output fluctuates with pressure changes leading to inefficient water use
Solution Approach 1:
The patent employs a pressure-compensating diaphragm that changes its physical state (flexes and deforms) in response to pressure fluctuations. This parameter change allows the diaphragm to modulate the flow passage area dynamically, maintaining constant water output despite pressure variations, thereby improving water use efficiency without significantly increasing device complexity.
3Ease of operation
If emitters are installed above ground for accessibility, then ease of operation is improved, but water is distributed to undesired terrain and evaporation losses increase
Solution Approach 1:
The patent transitions the emitter installation from the above-ground dimension to the subsurface dimension. By installing emitters underground, the system eliminates evaporation losses and prevents water distribution to undesired terrain while maintaining irrigation effectiveness through subsurface water delivery to plant root zones.
4Reliability
If plant roots are allowed to grow freely, then plant health is improved, but roots intrude into emitter outlets causing obstruction
Solution Approach 1:
The patent incorporates a filter screen at the emitter inlet that pre-filters debris and particulate matter from the irrigation water before it enters the flow passage. This preliminary filtering action prevents obstruction of the emitter outlet, ensuring reliable operation while maintaining the water conservation benefits of subsurface drip irrigation.
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 ensures a consistent water flow rate despite pressure fluctuations and effectively prevents root intrusion without harming plants or the environment, reducing maintenance costs and improving irrigation efficiency.
Implementation Method 1
a tortuous path flow channel that causes a pressure reduction between the irrigation tube and an emitter outlet
Implementation Method 2
a pressure compensation mechanism with a second inlet to stabilize water flow, combined with a copper member at the emitter outlet to prevent root intrusion, using a flexible diaphragm
Implementation Method 3
a copper member at the emitter outlet to prevent root intrusion
Data Source
AI summary
A drip emitter is provided for delivering irrigation water from a supply tube to an emitter outlet at a reduced and relatively constant flow rate. Water enters the emitter through a first inlet and proceeds into a first chamber. When the water pressure is above a predetermined level, a one-directional valve opens to allow fluid flow past the first chamber, through a tortuous path flow channel, and through an emitter outlet. A second inlet is used to compensate for water pressure fluctuations in the supply tube to maintain output flow at a relatively constant rate. Water enters the second inlet and presses a flexible diaphragm toward a water metering surface to provide pressure-dependent control of the output flow. A copper member is mounted to the emitter over the emitter outlet to prevent plant root intrusion into the emitter outlet.