Electrostatic spray device
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Solution Overview
Problem
Electrostatic spray devices face difficulties in atomizing and spraying liquids with low electric conductivity due to challenging electric charge separation, resulting in low spraying ability.
Innovation Solution
An electrostatic spray device design featuring a porous electrode, a ground ring, and a high-voltage applying terminal with a pointed end, which facilitates easy charge separation and efficient spraying by concentrating the electric field on the pointed end, even with functional liquids of low electric conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high voltage is applied to atomize liquid with low electric conductivity, then spraying ability should be improved, but electric charge separation becomes difficult resulting in low spraying ability
Solution Approach 1:
The high voltage applying terminal is designed with a pointed end configuration that concentrates the electric field at a specific location (the tip). This local concentration of electric field strength enables effective charge separation in liquids with low electric conductivity by creating a sufficiently strong electric force at the critical atomization point, thereby resolving the contradiction between maintaining spraying ability and achieving reliable charge separation.
2Device complexity
If conventional electrode design is used, then device structure is simple, but charge separation is difficult with low conductivity liquids reducing spraying performance
Solution Approach 1:
The electrode structure incorporates a pointed end at the high voltage applying terminal, creating a localized region of high electric field concentration. This simple geometric modification to the electrode shape enables effective charge separation and atomization of low conductivity liquids without significantly increasing overall device complexity, thus resolving the contradiction between structural simplicity and spraying performance.
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 device effectively increases spraying ability and efficiently sprays functional liquids, including those with low electric conductivity, and can be compactly integrated into devices like air purifiers.
Implementation Method 1
a porous electrode that is disposed in the container and through which the functional liquid is moved up by the capillary phenomenon
Implementation Method 2
electric charge separation by an electric force is difficult, so drops of the liquid is difficult to atomize
Implementation Method 3
an electric force larger than the surface tension of the liquid is generated and the drops of the liquid are atomized and split into a mist by the potential difference between the electrode and the ground electrode
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An electrostatic spray device of the present invention includes: a container that is filled with a functional liquid; a porous electrode that is disposed in the container and through which the functional liquid is moved up by the capillary phenomenon; a ground ring that generates a potential different from the porous electrode; and a high voltage applying terminal that applies high voltage generated by a high voltage generator to the functional liquid, in which the high voltage applying terminal has a pointed end at the lower portion. Accordingly, charge separation by an electric force is easy and a functional liquid with low electric conductivity can be efficiently sprayed.