Dual Flow Disperser Using Venturi Entrainment for Low-Pressure Spraying
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Solution Overview
Problem
Existing fluid dispersing systems, particularly those used for spraying viscous fluids like adhesives and paints, require high propellant pressures, leading to environmental hazards and inefficiencies, as they are often disposable and result in fluid wastage when pressure drops.
Innovation Solution
A reusable disperser system with a collapsible pouch and a cap assembly that forms a sealed chamber, using a valve and nozzle configuration to entrain fluid with gas pressure greater than ambient, allowing for low-pressure spraying through a Venturi effect, and optionally incorporating an electric air pump for consistent pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high propellant pressure is used to spray viscous fluids, then the fluid can be dispersed in a uniform pattern, but the system becomes hazardous and wasteful when pressure drops
Solution Approach 1:
The patent uses a two-fluid jet system where a primary fluid (viscous material) is atomized by a secondary fluid (gas or liquid propellant) through hydraulic/pneumatic principles. The secondary fluid flows through annular passages and creates a low-pressure zone that draws in and atomizes the primary fluid, eliminating the need for high-pressure propellants while achieving uniform spray patterns.
Solution Approach 2:
The patent introduces a secondary fluid as an intermediary that mediates between the viscous primary fluid and the atmosphere. This secondary fluid (gas or liquid) acts as a carrier that atomizes and disperses the primary fluid, replacing direct high-pressure propellant contact with the primary fluid, thereby reducing hazards while maintaining spray uniformity.
2Manufacturing precision
If high propellant pressure is used to spray viscous fluids, then the fluid can be dispersed uniformly, but fluid is wasted when pressure falls below necessary levels
Solution Approach 1:
The two-fluid jet mechanism uses hydraulic/pneumatic principles where the secondary fluid's flow rate and pressure can be independently controlled to maintain consistent atomization of the primary fluid. This allows uniform spray patterns to be achieved at lower, more stable pressures, preventing the fluid waste that occurs when high-pressure systems drop below threshold levels.
Solution Approach 2:
The system allows dynamic adjustment of the secondary fluid flow rate and pressure to match the viscosity and flow characteristics of the primary fluid. This dynamic control ensures that the atomization process remains effective and uniform across varying operating conditions, preventing fluid waste while maintaining spray quality.
3Device complexity
If disposable spray cans are used, then the system is simple and inexpensive, but environmental hazards increase due to landfill disposal and atmospheric particulate release
Solution Approach 1:
The patent segments the spray system into separate functional components: a reusable dispensing mechanism and replaceable fluid reservoirs. This allows the hazardous fluid to be contained in smaller, manageable containers that can be replaced rather than disposed of entirely, reducing landfill waste and atmospheric particulate release while maintaining operational simplicity.
Solution Approach 2:
The system allows for recovery and reuse of the dispensing mechanism and components. Fluid reservoirs can be emptied, replaced, or refilled, and the main dispensing body can be reused multiple times. This reduces the need for complete disposal of spray cans, minimizing environmental hazards from landfill disposal and atmospheric particulate release.
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
Enables efficient, low-pressure spraying of viscous fluids, reducing waste and environmental impact by using non-flammable and non-toxic propellants, and allowing for reusability, thus minimizing landfill disposal and atmospheric particulate release.
Implementation Method 1
gas from the chamber flows through the passage into the nozzle and so that the fluid flows into the passage and is entrained by the gas flowing through the passage, such that a gas and fluid suspension is forced out of the nozzle
Data Source
AI summary
A disperser system includes a disperser body that defines a substantially air-tight chamber therein. A sprayer assembly includes a passage, a fluid coupling, a nozzle, a valve, a valve trigger and a pouch. The passage is in fluid communication with the chamber. The valve is in fluid communication with both the passage and the fluid coupling and opens to the nozzle. The valve trigger is configured selectively to open the valve, thereby placing the passage and the fluid coupling in fluid communication with the nozzle. The pouch contains a fluid. When the chamber is charged with a gas and when the valve is opened, the gas flows through the passage and the fluid flows through the fluid coupling into the valve so that the gas entrains the fluid and delivers a suspension of the gas and the fluid to the nozzle, out of which the suspension is sprayed.