Liquid Jetting Nozzle Geometry for Straight Long-Range Droplets
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Solution Overview
Problem
Existing liquid jetting technologies struggle to achieve long-distance, straight-line flight of liquid droplets with high advancing properties, leading to non-uniform cleaning and processing of target objects.
Innovation Solution
A liquid jetting nozzle with a nozzle hole diameter ranging from 0.01 mm to 0.15 mm and a ratio of inlet opening diameter to nozzle hole diameter between 5 to 150, combined with a pressurized liquid supply unit providing jetting pressures from 0.2 MPa to 10 MPa, ensures high straight advancing property of liquid droplets over 100 mm to 150 mm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If liquid is jetted from a conventional nozzle, then liquid droplets are formed, but the droplets cannot fly straight over long distances (100 mm to 150 mm) with high advancing property
Solution Approach 1:
The patent applies parameter changes by optimizing the nozzle hole diameter (0.01 mm to 0.15 mm) and the ratio of inlet opening diameter to nozzle hole diameter (5 to 150). These parameter adjustments enable the liquid droplets to maintain high straight advancing property over long flight distances of 100 mm to 150 mm, resolving the contradiction between flight distance and advancing property.
2Productivity
If liquid is atomized in various directions, then liquid droplets are produced, but the droplets cannot be jetted linearly resulting in non-uniform cleaning force
Solution Approach 1:
The patent applies local quality by creating a focused linear jetting trajectory of liquid droplets through the optimized nozzle geometry. Instead of atomizing liquid in various directions, the nozzle structure ensures droplets are jetted linearly toward a specific target area, resulting in uniform cleaning force and improved cleaning efficiency.
3Manufacturing precision
If liquid droplets are deflected in various directions, then atomized liquid jetting is achieved, but uniform cleaning of a specific part of the target object becomes difficult
Solution Approach 1:
The patent applies inversion by reversing the conventional approach: instead of dispersing liquid droplets in various directions to achieve coverage, the nozzle is designed to concentrate droplets in a linear trajectory. This inverted approach achieves uniform cleaning of specific target areas while maintaining the ability to clean effectively.
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 precise and uniform cleaning of target objects by maintaining a narrow landing range and repeated impact of liquid droplets, enhancing cleaning efficiency and accuracy.
Implementation Method 1
a pressurized liquid supply unit configured to pressurize and supply a liquid to the liquid jetting nozzle
Implementation Method 2
liquid droplets being generated from a continuous flow of liquid jetted from the nozzle hole
Data Source
AI summary
Provided is a liquid jetting nozzle including a nozzle hole, the liquid jetting nozzle be configured to hit liquid droplets against a target object, the liquid droplets being generated from a continuous flow of a liquid jetted from the nozzle hole, wherein a nozzle hole diameter of the nozzle hole is in a range of from 0.01 mm to 0.15 mm, and a ratio of an opening diameter of a liquid inlet through which a liquid flows into the nozzle hole to a nozzle hole diameter is in a range of from 5 to 150.