Electrostatic Handheld Sprayer Piston Charging
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Solution Overview
Problem
Existing electrostatic sprayers face challenges in efficiently applying corrosive and low-viscosity fluid solutions, such as sanitary fluids, which are often highly atomized and require effective electrostatic charging mechanisms without compromising durability and usability.
Innovation Solution
A handheld electrostatic sprayer design that applies an electrostatic charge to the fluid between the reservoir and nozzle, utilizing a piston as the primary component for both fluid pressure and charging, eliminating the need for external electrodes and enhancing the sprayer's robustness and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrostatic spray guns with external electrodes are used, then electrostatic charging of fluid can be achieved, but device complexity and vulnerability to contact damage increase
Solution Approach 1:
The patent combines the fluid displacement function and electrostatic charging function into a single integrated pump unit. The pump serves dual purposes: moving the fluid through the system and generating the electrostatic charge simultaneously, thereby eliminating separate electrodes and reducing overall device complexity while improving reliability
Solution Approach 2:
The pump is designed to perform multiple functions: it acts as both a fluid displacement device and an electrostatic charge generation device. This multi-functionality reduces the number of components needed and simplifies the overall system architecture while maintaining effective electrostatic spraying capability
2Reliability
If electrostatic charging is applied to corrosive low-viscosity fluid solutions, then effective coating can be achieved, but the corrosive nature of the fluid compromises durability
Solution Approach 1:
The patent employs a flexible conduit with multi-layer construction including chemically resistant materials that protect against corrosion from the fluid. The conduit design incorporates layers that are both flexible for movement and chemically inert to resist degradation from corrosive substances
Solution Approach 2:
The flexible conduit is constructed from composite materials with different layers serving different functions: one layer provides chemical resistance to protect against corrosion, another layer provides flexibility for movement, and additional layers may provide structural support or electrical properties. This composite structure addresses both the corrosiveness issue and the need for durability
3Quantity of substance
If highly atomized fluid spray is generated, then improved coverage is achieved, but material usage efficiency decreases
Solution Approach 1:
The electrostatic charging mechanism creates feedback control over fluid deposition. The charged droplets are attracted to the grounded target surface, and the electrostatic field naturally guides the spray pattern, reducing overspray and ensuring that material is deposited where needed, thereby improving both coverage and material efficiency
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 sprayer efficiently atomizes and applies fluids with improved coverage and reduced material usage, offering a hybrid mode for both electrostatic and non-electrostatic spraying, enhancing usability and reducing power consumption.
Implementation Method 1
An electrostatic module supplies electrical energy to a conductive component that is exposed to the fluid within the pump to transfer electrostatic charge to the fluid
Implementation Method 2
A pump is provided with a piston configured to place the fluid under pressure to generate the atomized fluid spray
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A fluid sprayer (10) includes a pump (32) and an electrostatic module (40) configured to provide an electrostatic charge to spray fluid. The electrostatic module (40) is electrically connected to a conductive component of the fluid sprayer, such as a fluid displacement member (50), fitting, cylinder, or spray tip (52), to charge the spray fluid via the conductive component. The fluid is electrostatically charged prior to exiting the fluid sprayer (10).