Electrostatic spraying device and electrostatic spraying method

Abstract

The present application provides an electrostatic spraying device and an electrostatic spraying method. The electrostatic spraying device comprises: a high-voltage electrostatic generator for generating high-voltage electrostatic and comprising a positive output end and a negative output end; a charging electrode connected with the positive output end or the negative output end of the high-voltage electrostatic generator, the charging electrode being used for directly contacting with a liquid to be atomized to apply electrostatic charge to the liquid to be atomized; and an ionization emission electrode connected with the negative output end or the positive output end of the high-voltage electrostatic generator, the ionization emission electrode realizing ionization grounding by ionizing ambient air. The electrostatic spraying method comprises: applying electrostatic charge to a liquid to be atomized by a charging electrode connected with the positive output end or the negative output end of a high-voltage electrostatic generator in a direct contact manner; and ionizing ambient air by an ionization emission electrode connected with the negative output end or the positive output end of the high-voltage electrostatic generator to realize ionization grounding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrostatic spraying, and in particular to an electrostatic spraying device and an electrostatic spraying method. BACKGROUND

[0002] An electrostatic sprayer refers to a sprayer that can cause the sprayed droplets to produce a significant electrostatic ring-encircling adsorption effect on a target object. Electrostatic spraying has a series of advantages such as water saving, drug saving, high efficiency, and environmental protection, and is known as the ultimate technology for agricultural spraying. In order to ensure that the sprayed droplets can produce a significant ring-encircling adsorption effect on the target object, it is necessary to take measures to allow the target object to carry an electrostatic charge of the other polarity while allowing the liquid to carry an electrostatic charge of a certain polarity, that is, it is necessary to provide a grounding electrode to conduct the high-voltage electrostatic charge of the other polarity output by the high-voltage generator to the target object through the grounding electrode, so that the target object carries an electrostatic charge of the other polarity, forming an active electrostatic field with a closed loop of electric current centered on the high-voltage electrostatic generator. In this way, when the sprayed droplets carrying an electrostatic charge of a certain polarity float to the vicinity of the target object carrying an electrostatic charge of the other polarity under the multiple actions of gravity, the earth's gravity, and the electric field force, the dynamic charged droplets will quickly rush to the static target object under the action of the mutual attraction of opposite charges and be firmly adsorbed on the target object in all directions, thereby realizing the electrostatic ring-encircling adsorption effect of the droplets on the target object.

[0003] It has been proven that, without the grounding electrode, that is, without the active electrostatic field with a closed loop of electric current, although the sprayed droplets also carry an electrostatic charge of a certain polarity, it is difficult to achieve the electrostatic ring-encircling adsorption effect of the droplets on the target object. When the grounding electrode is provided and a good active electrostatic field with a closed loop of electric current is formed, it is easy to achieve the significant electrostatic ring-encircling adsorption effect of the droplets on the target object.

[0004] In order to achieve a good ring-encircling adsorption effect of electrostatic spraying, different direct connection grounding techniques are adopted in the prior art:

[0005] For a backpack type electrostatic sprayer, the electrostatic charge of one polarity output by the generator is connected to the skin of the human hand through a metal electrode connected by a wire, so that the human body carries an electric charge, and the electrostatic charge is conducted to the target object on the ground through the connection of the two feet of the human body to the ground, so that the target object on the ground carries an electrostatic charge of one polarity.

[0006] For an electrostatic sprayer provided with a metal frame, the electrostatic charge of the other polarity output by the generator is directly connected to the metal frame through a wire, and the electrostatic charge is conducted to the target object on the ground through the contact of the metal frame and the metal wheels on the frame to the ground, so that the target object on the ground carries an electrostatic charge of the other polarity.

[0007] Through the above-mentioned grounding method, the current closed loop of the electrostatic spraying can be effectively formed, and the electrostatic spraying embracing adsorption effect is well achieved. However, in actual use, it is found that there are many deficiencies and drawbacks:

[0008] The human body is directly grounded, which is easy to cause static stimulation of the human body, and the static charge strength on the target object is weakened or even disappeared due to the poor contact between the human skin and the electrode or the too insulating shoe sole material, thereby leading to unstable electrostatic embracing adsorption effect.

[0009] Through direct grounding with the metal frame, the entire metal frame will be charged with high-voltage static electricity, which is easy to interfere with other electrical components on the frame, water pipes and water pumps with another polarity of static electricity, thereby increasing the difficulty of insulation isolation of related components, and easily leading to mutual cancellation of positive and negative polarity static electricity, and further affecting the good realization of the electrostatic spraying embracing adsorption effect. At the same time, it also brings the risk of static stimulation to the operator who needs to operate on the frame.

[0010] Since the direct contact grounding technology has the above-mentioned defects and problems in actual application, it is necessary and important to develop and design a new grounding technology to solve the above-mentioned problems and deficiencies, which can not only ensure the stability of the electrostatic spraying embracing adsorption effect, but also better protect the safety and comfort of the operator. SUMMARY

[0011] In order to solve the above-mentioned technical problems, the present application discloses an electrostatic spraying device and an electrostatic spraying method, which ionizes the surrounding air through the discharge of the high-voltage ionization electrode to realize ionization grounding, thereby replacing the traditional direct contact grounding mode.

[0012] To achieve the above-mentioned purpose, the technical scheme of the present application provides an electrostatic spraying device, which comprises: a high-voltage static generator for generating high-voltage static electricity and comprising a positive output end and a negative output end; a charging electrode connected with the positive output end or the negative output end of the high-voltage static generator, the charging electrode being used for directly contacting with the liquid to be atomized to apply static electricity to the liquid to be atomized; and an ionization emission electrode connected with the negative output end or the positive output end of the high-voltage static generator, the ionization emission electrode realizing ionization grounding by ionizing the surrounding air.

[0013] Further, the electrostatic spraying device further comprises an ionization emission head, the ionization emission head comprises an insulating shell and an emission electrode connecting socket for connecting the ionization induction emission electrode, so that the ionization emission electrode is connected with the negative output end or the positive output end of the high-voltage electrostatic generator through the ionization emission head.

[0014] Further, the electrostatic spraying device comprises a liquid storage barrel for storing the liquid to be atomized and a base arranged below the liquid storage barrel, and the ionization emission head is mounted to the base.

[0015] Further, the ionization emission electrode adopts a metal single needle type or a carbon fiber multi-needle type structure.

[0016] Further, an electrode protection cover is further arranged around the ionization emission head, and the electrode protection cover is made of an insulating material.

[0017] Further, the electrostatic spraying device further comprises an energy storage capacitor arranged between the high-voltage electrostatic generator and the ionization emission head, for storing the high-voltage electrostatic output by the high-voltage electrostatic generator and then conducting to the ionization emission head.

[0018] Further, airtight and insulating connectors are further arranged between the high-voltage electrostatic generator and the energy storage capacitor and between the energy storage capacitor and the ionization emission head, and the airtight and insulating connectors adopt a structure of being wrapped by rubber and plastic and internally provided with a metal plug.

[0019] Further, the ionization emission electrode adopts a Teflon carbon fiber silica gel wire, and the ionization emission electrode is connected with the negative output end of the high-voltage electrostatic generator.

[0020] Further, the electrostatic spraying device comprises a spray head for atomizing and spraying liquid droplets with electrostatic charges, the effective height of the ionization induction emission electrode from the ground is arbitrarily set to be between 0-3m, and the radial distance between the spray head and the ionization induction emission electrode is greater than 30cm.

[0021] The technical scheme of the present application further provides an electrostatic spraying method, which comprises: applying electrostatic charges to the liquid to be atomized by a charging electrode connected with the positive output end or the negative output end of a high-voltage electrostatic generator in a direct contact manner; and ionizing the surrounding air by an ionization induction emission electrode connected with the negative output end or the positive output end of the high-voltage electrostatic generator, so as to realize ionization grounding. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of an electrostatic spraying device according to an embodiment of the present application;

[0023] Figure 2 is a structural schematic diagram of an ionization emitting head of an electrostatic spraying device according to an embodiment of the present application;

[0024] Figure 3A and Figure 3B is a structural schematic diagram of an ionization emitting electrode of an electrostatic spraying device according to an embodiment of the present application;

[0025] Figure 4 is a test effect demonstration diagram according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions of the present application are further described below in combination with specific embodiments, but the present application is not limited to these embodiments.

[0027] The technical solutions of the present application provide an electrostatic spraying device, which comprises: a high-voltage electrostatic generator for generating high-voltage electrostatic and comprising a positive output end and a negative output end; a charging electrode connected to the positive output end or the negative output end of the high-voltage electrostatic generator, the charging electrode being used to contact with a liquid to be atomized to apply electrostatic charge to the liquid to be atomized; and an ionization emitting electrode connected to the negative output end or the positive output end of the high-voltage electrostatic generator, the ionization emitting electrode realizing ionization conduction grounding by ionizing surrounding air.

[0028] Further, the electrostatic spraying device further comprises an ionization emitting head, the ionization emitting head comprising an insulating shell and an emitting electrode connecting jack for connecting the ionization emitting electrode, so that the ionization emitting electrode is connected to the negative output end or the positive output end of the high-voltage electrostatic generator through the ionization emitting head.

[0029] Further, the electrostatic spraying device comprises a liquid storage barrel for storing the liquid to be atomized and a base arranged below the liquid storage barrel, and the ionization emitting head is mounted to the base.

[0030] Further, the ionization emitting electrode adopts a metal single-needle structure or a carbon fiber multi-needle structure.

[0031] Further, an electrode protection cover is further arranged around the ionization emitting head, and the electrode protection cover is made of an insulating material.

[0032] Further, the electrostatic spraying device further comprises an energy storage capacitor, the energy storage capacitor being arranged between the high-voltage electrostatic generator and the ionization emitting head to store high-voltage electrostatic output by the high-voltage electrostatic generator and then conduct the high-voltage electrostatic to the ionization emitting head.

[0033] Further, airtight insulation type connectors are further arranged between the high-voltage electrostatic generator and the storage capacitor and between the storage capacitor and the ion emission head, and the airtight insulation type connectors are wrapped by rubber and plastic and internally provided with metal plug-in heads.

[0034] Further, the ion emission electrode is made of Teflon carbon fiber silica gel wire, and the ion emission electrode is connected to the negative output end of the high-voltage electrostatic generator.

[0035] Further, the electrostatic spraying device comprises a spray head for atomizing and spraying liquid droplets with electrostatic charges, the ion emission electrode can be arbitrarily set at a height of 0-3 m from the ground, and the radial distance between the spray head and the ion emission electrode is greater than 30 cm.

[0036] Further, the voltage of the high-voltage electrostatic generator is 25,000-35,000 volts.

[0037] Further, the ion emission head is arranged at an intermediate position of the electrode protection cover, and the electrode protection cover is about 1.5 cm higher than the ion emission electrode.

[0038] The technical scheme of the present application further provides an electrostatic spraying method, which comprises: applying electrostatic charges to liquid to be atomized by a charging electrode connected to the positive output end or the negative output end of a high-voltage electrostatic generator; ionizing ambient air by an ion emission electrode connected to the negative output end or the positive output end of the high-voltage electrostatic generator, so as to realize ionization grounding through the charged air conducted to the ground or a target object.

[0039] Referring to Figure 1 The electrostatic spraying device of the present application comprises: a high-voltage electrostatic generator 2 for generating high-voltage electrostatic charges and comprising a positive output end and a negative output end; a charging electrode 3 connected to the positive output end or the negative output end of the high-voltage electrostatic generator 2, the charging electrode 3 being used to contact liquid to be atomized to apply electrostatic charges to the liquid to be atomized; and an ion emission electrode 7 connected to the negative output end or the positive output end of the high-voltage electrostatic generator 2, the ion emission electrode 7 realizing ionization grounding by ionizing ambient air.

[0040] In Figure 1 , although the charging electrode 3 is installed in the liquid storage barrel 1, the installation position of the charging electrode 3 is not specifically limited as long as it can contact the liquid to be atomized, for example, it can also be installed in a liquid conveying pipeline.

[0041] According to the above technical solution of the present application, the high-voltage static electricity of one polarity output by the high-voltage static electricity generator 2 is connected to the charging electrode 3 made of copper and stainless steel material through the high-voltage resistant wire 4 to charge the liquid, so that the liquid with one polarity static charge enters the water pump 10 through the liquid pipeline, is pressurized by the water pump 10, and is sprayed out in the form of fine mist droplets with one polarity static charge through the spray rod 11, the spray head 12, and the nozzle 13. The high-voltage static electricity of another polarity output by the high-voltage static electricity generator 2 is conducted to the ionization emission electrode 7 through the high-voltage resistant wire 4, is discharged through the tip of the ionization emission electrode 7 to ionize the surrounding humid air and charge it, and is further conducted to the ground and the target object through the charged humid air, so as to realize the formation of the closed current loop of the electrostatic spraying.

[0042] In specific embodiments, in order to enhance the emission intensity of the ionization emission electrode 7, an energy storage enhancement capacitor 5 can be further arranged in the transmission line. The capacitor 5 is selected to be a high-voltage resistant large-capacity capacitor, so as to be able to accumulate a larger static current for strong emission output of the emission electrode.

[0043] In addition, in order to facilitate the installation and connection of the system, a sealed and insulated connector can be arranged in the transmission line. The connector is wrapped with rubber and plastic on the outside and is provided with a metal plug-in head on the inside, so as to facilitate the quick connection of the high-voltage line while ensuring that the high voltage does not leak. For example, the sealed and insulated connector 14 can be arranged on the line between the high-voltage static electricity generator 2 and the energy storage capacitor 5, or can be arranged on the transmission line between the energy storage capacitor 5 and the emission electrode 7.

[0044] In order to ensure the ionization effect of the air to realize the ionization grounding of the ionization emission electrode 7, the output voltage of the high-voltage static electricity generator 2 is greater than 10,000 volts. Considering the ionization effect and safety, the output voltage of the high-voltage static electricity generator 2 is preferably between 25,000 volts and 35,000 volts. In addition, through repeated tests of the applicant, the ionization grounding height of the ionization emission electrode 7 is preferably between 0-3m, and the radial distance between the emission electrode 7 and the spray head 12 is preferably greater than 30cm.

[0045] As for the ionization emission electrode 7, its installation mode and installation position are not specifically limited. In specific embodiments, in order to facilitate the installation and fixation of the ionization emission electrode 7, an ionization emission head 6 can be further arranged. Referring to Figure 2 which shows the specific structure of the ionization emission head 6. The ionization emission head 6 includes an insulating shell 601 and a connection jack 602 arranged in the shell 601 for connecting the emission electrode 7. The emission electrode connection jack 602 is connected to the high-voltage resistant wire 4, so that the ionization emission electrode 7 is connected to the negative output end or the positive output end of the high-voltage static electricity generator 2 through the ionization emission head 6.

[0046] In specific embodiments, the installation and fixation of the ionization emitting electrode 7 is achieved by installing or fixing the ionization emitting head 6. For example, the ionization emitting head 6 can be installed on the side or bottom of the liquid storage barrel 1. Preferably, the ionization emitting head 6 can be installed on the base of the atomizer barrel, specifically, a hole can be punched on the base to insert the emitting head, and the emitting head 6 can be fixed by screwing the thread 603.

[0047] In addition, the emitting head 6 can be further provided with an installation limit 604. In order to further enhance the emission intensity of the ionization emitting electrode 7, an energy storage coil 605 can be further provided at the front end of the connecting jack 602.

[0048] In further embodiments, in order to further ensure the safety of operation in practical application and guide the ionization effect of the ionization emitting electrode 7, an electrode protection cover 8 can be further provided around the emitting head 6, as shown in Figure 1 and Figure 2 The electrode protection cover 8 is made of insulating material, with an opening at the bottom, and the emitting head 6 is located in the middle position. Preferably, the height of the electrode protection cover 8 is about 1.5 cm higher than the top end position of the emitting electrode 7, so as not to affect the tip emission discharge of the emitting electrode 7, and also to prevent the operator from being stimulated by accidentally touching the emitting electrode 7 during operation.

[0049] Regarding the ionization emitting electrode 7, it can adopt a metal single needle structure as shown in Figure 3A or a carbon fiber multi-needle structure as shown in Figure 3B .

[0050] Referring to Figure 3A and Figure 3B , the ionization emitting electrode 7 can include a plug 701, an installation limit 702, an insulating shell 703, and a metal single needle 704 or a carbon fiber multi-needle 705. The plug 701 can be used to insert into the electrode connecting jack 602 of the emitting head 6 as described above. The installation limit 702 sets the installation depth, facilitating installation in place.

[0051] In preferred embodiments, the ionization emitting electrode 7 is connected to the negative output end of the high-voltage electrostatic generator 2 to release a large amount of negative ions during operation, thereby benefiting the health of the operator. In order to obtain better negative ion release effect, the ionization emitting electrode 7 preferably adopts a carbon fiber multi-needle structure, specifically, the ionization emitting electrode 7 can adopt a Teflon carbon fiber silica gel wire, which is composed of thousands of fine carbon fiber filaments, equivalent to thousands of sharp tips at the top end of the emitting electrode for discharge, thereby effectively improving the efficiency of ionization discharge.

[0052] The further embodiment of the present application also provides an electrostatic spraying method, which comprises: applying electrostatic charge to the liquid to be atomized by a charging electrode connected to the positive output terminal or the negative output terminal of a high-voltage electrostatic generator; and ionizing the ambient air by an ionization emission electrode connected to the negative output terminal or the positive output terminal of the high-voltage electrostatic generator to achieve ionized grounding.

[0053] In order to verify the ionized grounding effect and the spraying embracing effect of the electrostatic spraying device and the electrostatic spraying method according to the present application, the applicant has carried out repeated tests. The tests prove that the spraying embracing adsorption effect of the technical solution according to the present application is very ideal. In the tests, the height of the spraying head 12 from the target object is 0.5 meters, 1 meter and 2 meters respectively; the height of the ionization emission electrode 7 from the ground is 0.5 meters, 1 meter and 2.5 meters respectively; and the distance between the ionization emission electrode 7 and the target object is 0.5 meters, 5 meters and 10 meters respectively. See (A)-(C) of FIG. 6, which respectively show the spraying embracing adsorption effect of the spraying on the target object under the above conditions. Figure 4

[0054] The above only describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept, and these all fall within the protection scope of the present application.​

Claims

1. An electrostatic spraying device, characterized in that, The electrostatic spraying device includes: A high-voltage electrostatic generator is used to generate high-voltage static electricity and includes a positive output terminal and a negative output terminal. The charging electrode is connected to the positive or negative output terminal of the high-voltage electrostatic generator. The charging electrode is used to directly contact the liquid to be atomized in order to apply electrostatic charge to the liquid to be atomized. An ionizing emission electrode is connected to either the negative or positive output terminal of the high-voltage electrostatic generator. The ionizing emission electrode achieves ionization grounding by ionizing the surrounding air. The electrostatic spraying device further includes an ionization emitting head, which includes an insulating shell and an emitting electrode connection socket for connecting the ionization emitting electrode, so that the ionization emitting electrode is connected to the negative or positive output terminal of the high-voltage electrostatic generator through the ionization emitting head; The electrostatic spray further includes an energy storage capacitor, which is disposed between the high-voltage electrostatic generator and the ionization emitter head to store the high-voltage electrostatic energy output by the high-voltage electrostatic generator before conducting it to the ionization emitter head; and A sealed, insulated connector is further provided between the high-voltage electrostatic generator and the energy storage capacitor, and between the energy storage capacitor and the ionization emitter. The sealed, insulated connector is wrapped in rubber and plastic and has a metal plug inside.

2. The electrostatic spraying device according to claim 1, characterized in that, The electrostatic spraying device includes a storage tank for storing the liquid to be atomized and a base disposed below the storage tank, with the ionizing emitter mounted on the base.

3. The electrostatic spraying device according to claim 2, characterized in that, The ionization emission electrode adopts a metal single-needle or carbon fiber multi-needle structure.

4. The electrostatic spraying device according to claim 3, characterized in that, An electrode protective cover, made of insulating material, is further provided around the ionizing emitter.

5. The electrostatic spraying device according to claim 1, characterized in that, The ionization emission electrode is made of Teflon carbon fiber silicone wire.

6. The electrostatic spraying device according to any one of claims 1 to 5, characterized in that, The electrostatic spraying device includes a nozzle that atomizes and sprays droplets carrying electrostatic charges. The effective height of the ionization emission electrode above the ground can be arbitrarily set between 0 and 3m. The radial distance between the nozzle and the ionization emission electrode is greater than 30cm.

7. An electrostatic spraying method, characterized in that, Using the electrostatic spraying apparatus as described in any one of claims 1-6, the electrostatic spraying method comprises: Electrostatic charge is applied to the liquid to be atomized by direct contact with the charging electrode connected to the positive or negative output terminal of the high-voltage electrostatic generator. Ionized grounding is achieved by ionizing the surrounding air through an ionizing emission electrode connected to the negative or positive output terminal of the high-voltage electrostatic generator.

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