KR20240043995A - Nozzle Assembly for Electrospray - Google Patents

Abstract

The present invention relates to a nozzle assembly for electrostatic spraying in which the flow rate and spray angle are adjusted according to the pressure of the supplied fluid. A nozzle provided with a plurality of spray holes so that fine droplets are electrostatically sprayed at a predetermined spray angle, and fluid is supplied to the nozzle. A guiding supply pipe, a moving blocking plate provided inside the nozzle and moved according to the fluid pressure of the supply pipe to selectively open some of the plurality of spray holes, and a penetration plate provided in front of the nozzle and corresponding to the plurality of spray holes. A nozzle assembly for electrostatic spraying including an extraction plate having a hole is provided.

Description

Nozzle assembly for electrospray {Nozzle Assembly for Electrospray}

The present invention relates to a nozzle assembly for electrostatic spraying, and more specifically, to a nozzle assembly for electrostatic spraying in which the flow rate and spray angle are adjusted according to the pressure of the supplied fluid.

In general, electrostatic spraying technology supplies positive (+) and negative (-) high voltage to the liquid passing through the nozzle during spraying, so that the ions in the liquid move to the surface and change into fine droplets (water lumps) of tens of micrometers in size. It's technology.

The ultra-fine water droplets supplied through the nozzle using this electrostatic spray technology contain OH radicals and exhibit antibacterial and antiviral properties.

When electrostatic spraying technology is used for pesticides, etc., the adhesion to crops is more than 1,000 times higher than that of regular water/pesticides due to the electrical properties of water particles, improving adhesion efficiency, and the pesticide spraying volume is increased due to the antibacterial and antiviral properties of water particles. can be minimized. In addition, the electrical properties between water particles generate a pushing force, which expands the humidifying range and allows spraying to attach to a large surface area of crops, and the application range can be improved by up to 300% in densely packed crops.

Meanwhile, the electrostatic spraying device is a spraying device using electrostatic spraying technology, and has many advantages compared to various types of pressure sprayers or droplet generators. Because the shape and structure of the nozzle are simple, it is easy to manufacture and easily generate droplets ranging in size from hundreds of nanometers to tens of micrometers. In addition, it exhibits a monodisperse distribution and has the characteristic of generating charged fine droplets.

However, there was a problem in that it was not easy to minimize loss by controlling the droplets sprayed radially from the nozzle.

In this regard, electrostatic spraying technology that can improve the integration of multi-groove nozzles using an independent potential extractor has been disclosed through Korean Patent Publication No. 10-0947029. The extraction plate 200 disclosed in No. 10-0947029 is made of a flat plate with a plurality of holes 201 formed, and a polar voltage is applied to control spraying. When the same polarity voltage as that of the first voltage application unit 500 is applied from the second voltage application unit 600 to the extraction plate 200, the spray angle of the working fluid 300 sprayed from the groove nozzle 100 decreases. On the other hand, when a voltage opposite to that of the first voltage application unit 500 is applied from the second voltage application unit 600 to the extraction plate 200, the spray angle of the working fluid 300 sprayed from the groove nozzle 100 is large. As a result, the working fluid 300 is sprayed over a wide range.

However, there is a limit to increasing the spray angle, that is, the area covered, using a single nozzle, and in order to achieve this, there is a problem that a plurality of nozzles must be used.

Republic of Korea Patent Publication No. 10-0947029

The present invention, through one embodiment, seeks to provide a nozzle assembly for electrostatic spraying that increases the coating area by increasing the spray angle of electrostatic spraying.

In order to solve the above-described problems, the present invention includes: a nozzle provided with a plurality of spray holes so that fine droplets are electrostatically sprayed at a predetermined spray angle; a supply pipe guiding fluid to the nozzle; a moving blocking plate provided inside the nozzle and configured to move according to the fluid pressure of the supply pipe to selectively open some of the plurality of spray holes; and an extraction plate provided in front of the nozzle and having through holes corresponding to the plurality of spray holes.

When the fluid pressure in the supply pipe increases, the nozzle moves forward and opens an outermost spray hole previously blocked by the movable block among the plurality of spray holes, thereby increasing the spray angle.

The nozzle includes a nozzle head portion provided with the plurality of spray holes; a nozzle body that communicates with the nozzle head portion and forms a moving space so that the movement blocking plate can move together with the nozzle head portion; and

It may include an elastic part provided on the nozzle body and providing elastic recovery force to the movement blocking plate.

The nozzle head unit includes a first spray head unit that forms a front wall of the nozzle head unit and is provided with a first spray hole to spray fine droplets into a first area; And a second spray head portion forming a side of the nozzle head portion and having a second spray hole to spray fine droplets into one or more second regions surrounding the first region, wherein the movement blocking plate includes. Can be selectively positioned at a first position blocking the second spray hole and a second position advancing from the first position toward the front wall of the nozzle head portion to open the second spray hole.

The movable blocking plate is provided with a supply hole that supplies fluid to the nozzle head through penetration, and the elastic portion is connected to the rear of the nozzle body to provide elastic recovery force to the movable blocking plate.

As described above, according to an embodiment of the present invention, the spray angle of electrostatic spray is increased, thereby providing the effect of increasing the coverage area.

1 is a schematic diagram illustrating a nozzle assembly for electrostatic spraying according to an embodiment of the present invention, and shows the nozzle assembly for electrostatic spraying in a state where the pressure of the supplied fluid is relatively low.
FIG. 2 is a schematic diagram explaining the nozzle assembly for electrostatic spraying shown in FIG. 1, and shows the nozzle assembly for electrostatic spraying in a state where the pressure of the supplied fluid is relatively high.
FIG. 3 is a view showing one side of the nozzle shown in FIG. 1.
Figure 4 is a view showing one side of the extraction plate shown in Figure 1.
Figure 5 is a view showing the shape of the nozzle and extraction plate of Figures 3 and 4 overlapped with each other.

The embodiments described below are shown as examples to aid understanding of the invention, and it should be understood that the present invention can be implemented with various modifications different from the embodiments described herein. However, when describing the present invention, if it is determined that detailed descriptions of related known functions or components may unnecessarily obscure the gist of the present invention, the detailed descriptions and specific illustrations will be omitted. Additionally, in order to facilitate understanding of the invention, the attached drawings are not drawn to scale and the dimensions of some components may be exaggerated.

The first and second terms used in this application may be used to describe various components, but the components should not be limited by the terms. Terms are used only to distinguish one component from another.

Additionally, the terms used in this application are merely used to describe specific embodiments and are not intended to limit the scope of rights. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise,” “consist of,” or “consist of” are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification, but are intended to indicate the presence of one or It should be understood that this does not exclude in advance the presence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

Figure 1 is a schematic diagram illustrating a nozzle assembly 1 for electrostatic spraying according to an embodiment of the present invention, showing the nozzle assembly 1 for electrostatic spraying in a state where the pressure of the supplied fluid is relatively low, and Figure 2 shows Figure 1 This is a schematic diagram explaining the nozzle assembly 1 for electrostatic spraying shown in , showing the nozzle assembly 1 for electrostatic spraying in a state where the pressure of the supplied fluid is relatively high.

Referring to Figures 1 and 2, the nozzle assembly 1 for electrostatic spraying according to an embodiment of the present invention includes a nozzle 100 provided with a plurality of spray holes 111a and 113a, and guides fluid to the nozzle 100. It includes a supply pipe 300, a moving blocking plate 400 provided in the nozzle 100, and an extraction plate (extractor, 200) provided in front of the nozzle 100.

The nozzle 100 functions to spray fluid introduced from the outside into fine droplets by hydraulic pressure. The fluid flowing into the nozzle 100 has corresponding ions as a polarity voltage is applied from a fluid voltage application unit (not shown), but the method is not limited to this. For example, a polarity voltage may be applied through the nozzle 100. It may be possible.

Hereinafter, the nozzle 100 will be described with reference to FIGS. 1 to 3. Here, the added FIG. 3 is a view showing the shape of the front wall of the nozzle 100 shown in FIG. 1 when viewed from the outside.

Referring to FIGS. 1 to 3, the nozzle 100 has an internal space 140 capable of accommodating fluid, and a plurality of spray holes 111a and 113a are formed to spray the fluid.

The spray holes 111a and 113a have a diameter of approximately 100 to 200 ㎛, and as shown in FIG. 3, the first spray hole 111a formed in the central area of the front wall of the nozzle 100 and the nozzle 100 It includes a second spray hole 113a formed in an area surrounding the central area of the front wall.

The first spray holes 111a penetrate the front wall of the nozzle 100 and are plural. The first spray hole 111a has an inlet part provided on the inside of the front wall of the nozzle 100 and communicates with the internal space 140, and an outlet part is provided on the outside of the front wall of the nozzle 100 and communicates with the outside.

Here, the front wall of the nozzle 100 is the wall facing the extraction plate 200, the rear wall of the nozzle 100 is a wall located on the opposite side of the front wall, and the side wall is the wall between the front and rear walls. It is a connecting wall.

The second spray holes 113a are partially provided on the side wall of the nozzle 100 and form a plurality of second spray holes 113a. The second spray hole 113a has an inlet portion provided inside the side wall of the nozzle 100 and communicates with the internal space 140, and an outlet portion provided on the outside of the front or side wall of the nozzle 100 to communicate with the outside. .

Accordingly, when fluid is sprayed from the nozzle 100, fine droplets may be electrostatically sprayed at a predetermined spray angle.

Meanwhile, the nozzle 100 is provided in a nozzle head unit 110 having a plurality of spray holes 111a and 113a, a nozzle body 130 in communication with the nozzle head unit 110, and moves. It includes an elastic portion 150 that provides elastic recovery to the blocking plate 400.

A space is formed inside the nozzle head portion 110, and one end is open. The nozzle head portion 110 is coupled to the nozzle body 130 through an open end. The nozzle head unit 110 includes a first spray head unit 111 and a second spray head unit 113 formed to surround the first spray head unit 111.

The first spray head unit 111 forms the front wall of the nozzle head unit 110 and is provided with a first spray hole 111a to spray fine droplets into the first area (A). The first spray hole (111a) penetrates the first spray head portion (111).

The second spray head unit 113 may form the side wall of the nozzle head unit 110, or may form the front edge and side wall of the nozzle head unit 110. The second spray head unit 113 communicates with the first spray head unit 111. The second spray head unit 113 is provided with a second spray hole 113a to spray fine droplets into one or more of the second areas B surrounding the first area A. The second spray hole (113a) penetrates the second spray head portion (113).

The nozzle body 130 communicates with the nozzle head unit 110, and specifically communicates with the second spray head unit 113. The nozzle body 130 forms a moving space 140, that is, the aforementioned internal space 140, so that the moving blocking plate 400 can move together with the nozzle head portion 110.

Meanwhile, an internal guide groove (not shown) may be formed on the inner wall of the nozzle 100 defining the movement space 140 to allow the movement blocking plate 400 to move.

The nozzle head portion 110 and the nozzle body 130 may be formed as one piece, and may be manufactured using a variety of methods such as injection, extrusion, vacuum forming, and blow molding using materials containing PC (polycarbonate).

The elastic portion 150 is connected to the rear wall of the nozzle body 130 to provide elastic recovery to the movement blocking plate 400. For example, it may be a spring, but is not limited thereto. The elastic portion 150 pulls the movement blocking plate 400 in a direction opposite to the direction in which the movement blocking plate 400 moves due to the pressure of the fluid.

The movement blocking plate 400 is formed in the shape of a plate that divides the internal space 140 of the nozzle 100 into two parts, and may be made of a flexible material such as rubber. The movement blocking plate 400 is formed with a supply hole 400a that supplies fluid to the spray holes 111a and 113a.

The moving blocking plate 400 includes a front facing the spray holes 111a and 113a, a rear located on the opposite side of the front, and a side connecting the front and rear. The side of the movement blocking plate 400 is movably supported by the inner wall of the movement space 140. The side of the movement blocking plate 400 may be provided with a protrusion (not shown) accommodated in a guide groove (not shown).

The movement blocking plate 400 is formed to make surface contact with the inner wall of the nozzle 100. As the movable blocking plate 400 moves, the side of the movable blocking plate 400 may open or block the second spray hole 113a.

The moving blocking plate 400 does not block the first spray hole (111a). For this purpose, the elastic coefficient of the elastic portion 150 may be adjusted, or a protrusion, etc. may be provided on the front of the movement blocking plate 400. When a protrusion, etc. is provided on the front of the moving blocking plate 400, the front of the moving blocking plate 400 and the inside of the front wall of the nozzle 100 are spaced apart, so that the moving blocking plate 400 blocks the first spray hole (111a). I never do that.

Hereinafter, the extraction plate 200 will be described with reference to FIGS. 4 and 5. FIG. 4 is a view showing one side of the extraction plate shown in FIG. 1, and FIG. 5 is a view showing a shape in which the nozzle 100 and the extraction plate 200 of FIGS. 3 and 4 overlap each other.

The extraction plate 200 may be made of a conductive material, for example, stainless steel such as STS304.

The extraction plate 200 is provided in front of the nozzle 100 and can be used as a component to enable stable electrostatic spraying and at the same time control the spraying of fine droplets from the nozzle 100. Accordingly, the extraction plate 200 has through-holes 210 and 230 formed at positions corresponding to the plurality of spray holes 111a and 113a, and a separate voltage can be applied.

For example, when the same polarity voltage as that of the fluid voltage application unit (not shown) is applied to the extraction plate 200, the spray angle of the fluid sprayed from each spray hole 111a and 113a is reduced. As another example, when the same polarity voltage as that of the fluid voltage application unit is applied, the extraction plate 200 can spray the fluid over a wide range by increasing the spray angle of the fluid sprayed from each spray hole (111a, 113a).

This extraction plate 200 is provided with a first through hole 210 provided in the central area to correspond to the first spray hole 111a, and an edge area surrounding the central area to correspond to the second spray hole 113a. It includes a second through hole 230. In the drawings, the first through-hole 210 is represented as a singular number, and the second through-hole 230 is represented as a plurality, but they are not limited thereto.

The droplets that are sprayed from the first spray hole (111a) and form a jet are formed up to the first through hole (210) of the extraction plate (200), and after passing through the extraction plate (200), the droplets are split and become atomized. The droplets that are sprayed from the second spray hole (113a) and form a jet are formed up to the second through hole (230) of the extraction plate (200). After passing through the extraction plate (200), the droplets are split and become atomized.

The supply pipe 300 has a flow path within which fluid can move. The supply pipe 300 communicates with the external supply source (S) and the nozzle 100, and supplies fluid from the external supply source (S) to the nozzle 100.

Hereinafter, the operation of the nozzle assembly 1 for electrostatic spraying according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

First, when the fluid pressure inside the supply pipe 300 is the first pressure, the moving blocking plate 400 is located at the first position to block the second spray hole 113a. The movable blocking plate 400 set at the first position blocks the second spray hole 113a.

The fluid supplied to the nozzle 100 through the supply pipe 300 moves to the first spray hole 111a through the supply hole 400a of the movement blocking plate 400 and is then sprayed in the form of fine droplets.

The sprayed fine droplets reach the first area (A), which is the target point.

Thereafter, when the fluid pressure inside the supply pipe 300 rises to a second pressure greater than the first pressure, the movement blocking plate 400 advances toward the front wall of the nozzle head portion 110 and the previously blocked second spray hole ( It is located in the second position where 113a) is opened.

At this time, the movement blocking plate 400 does not block the first spray hole (111a) due to the elastic recovery force or protrusion of the elastic part 150, and both the first spray hole (111a) and the second spray hole (113a) are open. do.

As the outermost second spray hole (113a) is opened, the sprayed fine droplets reach not only the first area (A) but also the second area (B) surrounding the first area (A).

Accordingly, the spray angle by the nozzle 100 increases, and the spray amount also increases.

That is, when the fluid pressure of the supply pipe 300 increases from the first pressure to the second pressure, the injection angle and injection amount by the nozzle 100 increase.

As described above, although the present invention has been described with limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art. Of course, various modifications and variations are possible within the scope of equivalency of the patent claims described in .

1: Nozzle assembly for electrostatic spraying
100: nozzle
200: extraction plate
300: supply pipe
400: Moving blocking plate

Claims (5)

A nozzle provided with a plurality of spray holes so that fine droplets are electrostatically sprayed at a predetermined spray angle;
a supply pipe guiding fluid to the nozzle;
a moving blocking plate provided inside the nozzle and configured to move according to the fluid pressure of the supply pipe to selectively open some of the plurality of spray holes; and
A nozzle assembly for electrostatic spraying, comprising: an extraction plate provided in front of the nozzle and having through holes corresponding to the plurality of spray holes. According to paragraph 1,
The nozzle is
When the fluid pressure in the supply pipe increases, the movable blocking plate moves forward to open the outermost spray hole previously blocked by the movable blocking plate among the plurality of spray holes to increase the spraying angle. assembly. According to paragraph 1,
The nozzle is
a nozzle head portion provided with the plurality of spray holes;
a nozzle body that communicates with the nozzle head portion and forms a moving space so that the movement blocking plate can move together with the nozzle head portion; and
An elastic portion provided on the nozzle body to provide elastic recovery to the movement blocking plate. A nozzle assembly for electrostatic spraying, comprising: According to paragraph 3,
The nozzle head part
a first spray head portion that forms the front wall of the nozzle head portion and is provided with a first spray hole to spray fine droplets into a first area; and
A second spray head unit forms a side of the nozzle head unit and is provided with a second spray hole to spray fine droplets into one or more second areas surrounding the first area,
The movement blocking plate is
A nozzle assembly for electrostatic spraying, characterized in that it is selectively positioned in a first position for blocking the second spray hole and a second position for opening the second spray hole by advancing from the first position toward the front wall of the nozzle head portion. . According to paragraph 3,
The movement blocking plate is provided with a supply hole that passes fluid through and supplies it to the nozzle head,
The nozzle assembly for electrostatic spraying, wherein the elastic portion is connected to the rear of the nozzle body to provide elastic recovery to the movement blocking plate.

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