Electrostatic Spraying Device Rearward Electrode Design
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Solution Overview
Problem
Existing electrostatic spraying devices with external charge types face issues of reduced operability due to the need to avoid electrode contact, inefficient paint charging, and electrode contamination, as the high-voltage electrode protrudes ahead of the spray outlet.
Innovation Solution
The high-voltage electrode is positioned rearward of the paint outlet on the device body, insulated from the paint flow passage, allowing for improved operability and charging efficiency while preventing paint adhesion and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the high-voltage electrode protrudes forward from the spray outlet, then the electrode can generate an electric field for paint charging, but the operability is reduced due to risk of contact with objects or personnel
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the high-voltage electrode backwardly from the spray outlet instead of forward. This reversal eliminates the safety hazard of electrode contact while preserving the charging function through the electric field generated in the paint spray path.
Solution Approach 2:
The electrode is positioned in a different spatial dimension relative to the spray outlet - specifically, backwardly away from it. This dimensional repositioning allows the electric field to still intersect the paint spray path for charging while removing the electrode from the forward projection that causes operational hazards.
2Reliability
If the high-voltage electrode is positioned ahead of the spray outlet, then it can charge paint through electric field generation, but the charging efficiency is significantly reduced
Solution Approach 1:
By inverting the electrode position from forward to backward relative to the spray outlet, the patent optimizes the electric field configuration to achieve better charging efficiency. The backward positioning allows the electric field to more effectively interact with the paint atoms in the spray path.
3Reliability
If the high-voltage electrode is located ahead of the spray outlet space, then it can generate electric field for charging, but the sprayed paint adheres to the electrode causing contamination
Solution Approach 1:
The patent resolves the contamination issue by inverting the electrode position to backwardly away from the spray outlet. This reversal removes the electrode from the paint spray impact zone, preventing paint adhesion and contamination while maintaining the charging function through electric field generation in the appropriate spatial configuration.
4Ease of operation
If the high-voltage electrode is provided inside the device body, then operability improves and contact risk is reduced, but the charging efficiency becomes unstable depending on compressed air flow rate
Solution Approach 1:
The patent achieves stable charging efficiency with improved operability by positioning the electrode in a specific dimensional configuration - backwardly from the spray outlet at a predetermined distance. This spatial arrangement ensures consistent electric field interaction with paint atoms independent of compressed air flow rate variations.
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
This configuration enhances user safety and efficiency by reducing the risk of electrode contact, improving paint charging, and minimizing contamination of the electrode and device.
Implementation Method 1
a high-voltage generating part which generates high voltage with which paint sprayed from the paint outlet is charged
Implementation Method 2
the high-voltage electrode to which the high voltage generated by the high voltage generating part is applied
Data Source
AI summary
An electrostatic spraying device includes a device body having a paint supply passage, a paint nozzle located on a distal end of the device body and having a paint flow passage communicating with the paint supply passage and a paint outlet, a high-voltage generating part configured to generate high voltage with which paint is charged, and a high-voltage electrode disposed a predetermined distance backwardly away from the paint outlet on an outer periphery of the device body, so as to be separated from the paint flow passage. The device further includes a conductor located between the high-voltage generating part and the high-voltage electrode, a spring located between the high-voltage electrode and the conductor, a high-voltage electrode case detachably attached to the device body to enclose the high-voltage electrode, and a grip mounted on an end of the device body, which end is located opposite the paint nozzle.