Unitary Elastomeric Emitter Outlet for Consistent Drip Flow
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Solution Overview
Problem
Existing drip emitters, particularly subsurface and above-ground emitters, face issues with inconsistent water output, clogging, and complex multi-piece constructions that lead to manufacturing challenges and increased costs.
Innovation Solution
A unitary elastomeric emitter design with a pressure-reducing flow channel and pressure compensating mechanism, featuring a single-piece construction, deflectable baffle walls, and guide ribs to prevent clogging and maintain consistent fluid flow, using materials like thermoplastic polyolefin and silicone rubber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a multi-piece construction is used for drip emitters, then ease of manufacture and assembly is improved, but device complexity increases and manufacturing costs increase
Solution Approach 1:
The patent merges multiple separate components (housing, baffle, outlet structure) into a single unitary elastomeric body. This eliminates the need for assembly operations while reducing the number of parts that could fail or misalign, thereby reducing device complexity without sacrificing manufacturability.
Solution Approach 2:
The single-piece elastomeric construction performs multiple functions simultaneously: it provides structural support, creates pressure-reducing flow channels, forms outlet structures, and enables pressure compensation. This multi-functionality reduces the need for separate specialized components.
2Ease of manufacture
If a multi-piece construction is used for drip emitters, then ease of manufacture is improved, but assembly time increases
Solution Approach 1:
By combining all emitter components into a single molded unit, the patent eliminates the assembly process entirely. The emitter is manufactured as one piece through injection molding or similar processes, reducing assembly time to zero while maintaining ease of manufacture through efficient single-piece molding.
3Manufacturing precision
If outlet openings are precisely located in relation to emitter outlet, then fluid flow consistency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The emitter outlet structure is designed to self-align with the drip line outlet through its integration into the elastomeric body. The pressure-reducing flow channels and outlet structures are formed as part of the molded component, automatically positioning them correctly relative to the drip line outlet without requiring high-precision manual alignment during assembly.
Solution Approach 2:
The patent uses pressure-reducing flow channels with specific geometric parameters (cross-sectional area, length, shape) that are molded into the elastomeric body. These parameters are designed to compensate for variations in outlet positioning, maintaining consistent fluid flow patterns even with typical manufacturing tolerances in outlet location.
4Quantity of substance
If high pressure water flows through the emitter, then flow rate is improved, but fluid pattern consistency deteriorates due to squirting
Solution Approach 1:
The emitter incorporates a pressure-compensating mechanism where the elastomeric body deflects under high pressure conditions. This deflection dynamically adjusts the internal flow channel cross-sections and outlet opening sizes to compensate for pressure increases, maintaining consistent fluid flow patterns and preventing squirting even when supply pressure varies.
Solution Approach 2:
The patent designs flow channels with specific pressure-reducing parameters (cross-sectional area, length, geometry) that transform high-pressure water flow into low-pressure flow. The outlet structure parameters are also designed to maintain consistent flow patterns. The elastomeric material properties and thickness are optimized to provide pressure compensation.
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 design ensures a consistent water output, reduces clogging, simplifies manufacturing, and lowers production costs by minimizing parts and assembly time, while maintaining performance under varying pressure conditions.
Implementation Method 1
Each drip emitter generally includes a housing defining a flow path that reduces high pressure water entering the drip emitter into relatively low pressure water exiting the drip emitter
Implementation Method 2
pressure compensating mechanism, featuring a single-piece construction, deflectable baffle walls
Data Source
AI summary
An emitter outlet defining an ingress channel having a first volume and area, and having a first portion that is substantially perpendicular to a second portion located downstream of the first portion which causes fluid flowing through the ingress channel to make a first fluid velocity reducing turn, and a first opening located off of the second portion that causes at least a portion of the fluid flowing through the ingress channel to make a second fluid velocity reducing turn, and an outlet bath with a second volume and area that is larger than the first volume and area of the ingress channel so as to cause further pressure and/or velocity reduction of the fluid entering into the outlet bath. In addition, emitters, drip lines and various methods relating to such an emitter outlet configuration are also disclosed.