CN111888510B

CN111888510B - Electrostatic aerosol spray sterilizer and working method thereof

Info

Publication number: CN111888510B
Application number: CN202010713171.4A
Authority: CN
Inventors: 李金钟
Original assignee: Qingdao Chanshan Environmental Protection Technology Co ltd
Current assignee: Qingdao Chanshan Environmental Protection Technology Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2023-08-29
Anticipated expiration: 2040-07-22
Also published as: CN111888510A

Abstract

The invention provides an electrostatic aerosol spray sterilizer and a working method thereof, which belong to the technical field of spray sterilizers, wherein the electrostatic aerosol spray sterilizer comprises two shells and a spray head assembly, the two shells are fixedly connected through bolts, a water tank is arranged in the shells, a direct current fan is arranged on one side of the water tank, and a rubber sleeve is arranged on one side of the direct current fan; the spray head assembly comprises a fairing, a spray head cover, an electrostatic spray head cover and an electrostatic ring, wherein the fairing is fixedly connected with the two shells through bolts, and meanwhile, under the negative pressure effect, air is sucked into the electrostatic spray head from the small holes at the rear end of the electrostatic spray head cover and wraps aerosol liquid drops, so that the contact between the aerosol liquid drops and the side wall of the electrostatic spray head cover can be reduced, and the dripping caused by the fact that mist drops are adsorbed on the inner wall of the electrostatic spray head cover is avoided. Further resulting in a short circuit of the high voltage electric field and loss of the spray carrying capacity.

Description

Electrostatic aerosol spray sterilizer and working method thereof

Technical Field

The invention belongs to the technical field of spray disinfectors, and particularly relates to an electrostatic aerosol spray disinfector and a working method thereof.

Background

The electrostatic spraying technology is to build an electrostatic field between the spray head and the spraying target by using high-voltage static electricity, and after the pesticide fluid is atomized by the spray head, the pesticide fluid is charged by different charging methods to form group charged fog drops, and then the fog drops are directionally moved to be adsorbed on all parts of the target under the combined action of electrostatic field force and other external force, so that the problems of high deposition efficiency, less drift and dissipation of the fog drops, improvement of ecological environment and the like are achieved, and how to charge the fog drops is a key problem.

In the prior art, there are three main methods for charging the mist droplets: (1) corona charging; (2) a contact charging method; (3) In addition, the induction type charging method is that an induction electrode is arranged outside a nozzle outlet, so that liquid forms water mist at the nozzle outlet, and according to the electrostatic induction principle, sprayed mist drops have charges with polarity opposite to that of an external electric field, so that the method is safer compared with the former two methods, but in the actual use process, because the external electric field has certain attractive force on the electrified mist, part of mist drops with smaller kinetic energy can be adsorbed on the inner wall of an electrostatic spray cover and drip from a nozzle to cause short circuit of the external electric field.

Disclosure of Invention

The embodiment of the invention provides an electrostatic aerosol spray sterilizer and a working method thereof, and aims to solve the problems that the existing electrostatic spray nozzle has a certain attractive force on charged spray due to an external electric field, part of fog drops with smaller kinetic energy can be adsorbed on the inner wall of an electrostatic spray nozzle cover and drip from a nozzle, so that waste and pollution to the environment are caused.

In view of the above problems, the technical scheme provided by the invention is as follows:

an electrostatic aerosol spray sterilizer, comprising:

the device comprises two shells, wherein the two shells are fixedly connected through bolts, a water tank is arranged in the shells, a direct current fan is arranged on one side of the water tank, and a rubber sleeve is arranged on one side of the direct current fan;

the spray head assembly comprises a fairing, a spray head sleeve, an electrostatic spray head cover and an electrostatic ring, wherein a fan pressing plate is arranged in the fairing, a high-voltage generator module is arranged on the right side of the fan pressing plate, a fixed sleeve is fixedly connected to the fairing, a butt joint nozzle is connected to the fairing through a hose, one end of the butt joint nozzle is communicated with the water tank through a connecting pipe, the spray head sleeve is in threaded connection with one end of the fairing, the electrostatic spray head is in threaded connection with one end of the spray head sleeve, an impeller is arranged in the electrostatic spray head, a valve is fixedly connected to one side of the impeller, a nozzle is arranged on the other side of the impeller, the other end of the butt joint nozzle is communicated with the input end of the valve through the connecting pipe, the electrostatic spray head sleeve is in threaded connection with one end of the electrostatic spray head, and the electrostatic ring is arranged on the inner side of the electrostatic spray head cover.

Further, a liquid adding filter screen is arranged above the water tank.

Further, handles are uniformly and integrally formed on the upper surfaces of the two shells.

Further, a base is fixedly connected between the two shells and is positioned on the lower surfaces of the two shells.

Further, a line sheath is arranged on one side of the shell.

Further, a plurality of air supplementing ports are formed in the outer surface of the electrostatic spray head cover.

Further, an internal thread is formed on the inner side of the electrostatic ring.

Further, the valve, the nozzle and the electrostatic ring are made of titanium metal.

Further, the air flow in the electrostatic nozzle cover is 360-degree rotating air flow or parallel air flow.

There is provided in accordance with the above-described embodiments of the present invention, a method of operating an electrostatic aerosol spray sterilizer, comprising the steps of:

s1, starting a direct current fan, inputting high-pressure air flow into the fairing and the electrostatic spray head by the direct current fan, generating high-pressure vortex air flow when the high-pressure air flow meets the impeller, forming a Venturi effect at a nozzle, generating a negative pressure area around the nozzle, and pumping out liquid in the water tank under the negative pressure effect.

S2, opening a valve while pumping out liquid in the water tank, and shredding the liquid under the action of intense high-pressure vortex airflow at the nozzle to form fine mist aerosol.

S3, generating Bernoulli effect after inputting high-pressure air flow into the electrostatic spray head, and generating negative pressure at the air supplementing port of the electrostatic spray head cover and the through hole at the rear end of the electrostatic spray head to suck external air into the electrostatic spray head.

S4, sucking the aerosol droplets into the electrostatic spray head to wrap the aerosol droplets to form a protective layer so as to spray the aerosol droplets from the electrostatic spray head.

Compared with the prior art, the invention has the beneficial effects that: in the working process of the device, the high-pressure air flow generated by the direct-current fan is accelerated and released through a narrow part between the impeller and the nozzle, negative pressure is formed around the nozzle according to the Venturi effect, liquid in the water tank is pumped out under the negative pressure effect, and the liquid is shredded under the action of intense high-pressure vortex air flow at the nozzle to form fine mist aerosol. Simultaneously, under the action of negative pressure, air is sucked into the electrostatic spray head from the small holes at the rear end of the electrostatic spray head cover and wraps aerosol liquid drops, so that the contact between the spray and the side wall of the electrostatic spray head cover can be reduced, and the dripping caused by the fact that the mist drops are adsorbed on the inner wall of the electrostatic spray head cover is avoided. Further resulting in a short circuit of the high voltage electric field and loss of the spray carrying capacity.

The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.

Drawings

FIG. 1 is a perspective view of an electrostatic aerosol spray sterilizer and method of operation thereof as disclosed herein;

FIG. 2 is a schematic view of the internal structure of a housing of an electrostatic aerosol spray sterilizer and a method of operating the same according to the present disclosure;

FIG. 3 is an exploded view of a spray head assembly of an electrostatic aerosol spray sterilizer and method of operation thereof in accordance with the present disclosure;

FIG. 4 is a flow chart of the operation of the disclosed electrostatic aerosol spray sterilizer and method of operation;

FIG. 5 is a side view of an embodiment of an electrostatic aerosol spray sterilizer and method of operation thereof as disclosed herein;

FIG. 6 is a perspective view of a third embodiment of an electrostatic aerosol spray sterilizer and method of operation thereof as disclosed herein;

FIG. 7 is a cross-sectional view taken at A-A in FIG. 6.

Reference numerals illustrate: 100-shell, 111-liquid adding filter screen, 110-water tank, 120-direct current fan, 121-rubber sleeve, 130-handle, 140-base, 150-circuit sheath, 200-spray head assembly, 210-fairing, 211-fan pressing plate, 212-high voltage generator module, 213-fixed sleeve, 2131-butt joint mouth, 220-spray head sleeve, 230-electrostatic spray head, 231-impeller, 232-valve, 233-nozzle, 234-through hole, 240-electrostatic spray head cover, 241-air compensating mouth, 250-electrostatic ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Example 1

Referring to fig. 1-4, the invention provides a technical scheme that: an electrostatic aerosol spray sterilizer includes a housing 100 and a spray head assembly 200.

Referring to fig. 1-3, the number of the shells 100 is two, the two shells 100 are fixedly connected through bolts, a water tank 110 is arranged in the shell 100, a direct current fan 120 is arranged on one side of the water tank 110, and a rubber sleeve 121 is arranged on one side of the direct current fan 120; the spray head assembly 200 comprises a fairing 210, a spray head sleeve 220, an electrostatic spray head 230, an electrostatic spray head cover 240 and an electrostatic ring 250, wherein the fairing 210 is fixedly connected with two shells 100 through bolts, a fan pressing plate 211 is arranged in the fairing 210, a high-voltage generator module 212 is arranged on the right side of the fan pressing plate 211, a fixing sleeve 213 is fixedly connected with the inside of the fairing 210, a butt joint nozzle 2131 is connected with the inside of the fixing sleeve 213 through a hose, one end of the butt joint nozzle 2131 is communicated with the water tank 110 through a connecting pipe, the spray head sleeve 220 is in threaded connection with one end of the fairing 210, one end of the spray head sleeve 220 is in threaded connection with the electrostatic spray head 230, a through hole 234 is formed in one side of the outer surface of the electrostatic spray head 230, an impeller 231 is arranged in the inside of the electrostatic spray head 230, a valve 232 is fixedly connected with one side of the impeller 231, the other side of the impeller 231 is provided with a nozzle 233, the other end of the butt joint nozzle 2131 is communicated with the input end of the valve 232 through the connecting pipe, one end of the electrostatic spray head 240 is in threaded connection with the one end of the electrostatic spray head cover 230, and the electrostatic spray head cover 250 is provided with the electrostatic spray ring 250.

In this embodiment, during spraying, the direct current fan 120 is electrically connected to the high voltage generator module 212, the direct current fan 120 is electrified to input high pressure airflow into the fairing 210 and the electrostatic spray head 230, and when the high pressure airflow encounters the impeller 231, high pressure vortex airflow is generated, according to the venturi effect principle, a negative pressure area can be generated around the nozzle 233, the liquid in the water tank 110 is pumped out under the negative pressure effect, and is torn up under the action of the intense high pressure vortex airflow at the nozzle 233, so as to form fine mist aerosol; according to the electrostatic induction principle, in the process, the electrostatic spray head 230 with charges generates secondary atomization when the fog drops are sprayed, the charging time of the fog drops is increased by the secondary charging, the charge-to-mass ratio of the fog drops is improved, the adhesiveness of the fog drops is increased, and the utilization rate of spraying can be effectively improved; meanwhile, under the action of negative pressure generated in the electrostatic spray head 230, air is sucked into the electrostatic spray head 230 from the air supplementing port 241 of the electrostatic spray head cover 240 and the through hole 234 at the rear end of the electrostatic spray head 230, and aerosol droplets in the electrostatic spray head 230 can be wrapped to form a protective layer, so that the mist is reduced to be contacted with the side wall of the electrostatic spray head cover 240, the droplets are prevented from being adsorbed on the inner wall of the electrostatic spray head cover 240 to cause dripping, and further, a short circuit of a high-voltage electric field is caused, so that the spraying charge capacity is lost.

The embodiment of the invention is also realized by the following technical scheme.

In the embodiment of the present invention, a liquid adding filter 111 is disposed above the water tank 110; the water or the impurities in the liquid medicine can be effectively filtered, so that the nozzle 233 is prevented from being blocked by the impurities, and the smoothness of the nozzle 233 is further enhanced.

In the embodiment of the present invention, the handles 130 are integrally formed on the upper surfaces of the two housings 100; the ability to use the handle 130 facilitates user use of the device.

In the embodiment of the present invention, a base 140 is fixedly connected between the two housings 100 and located on the lower surfaces of the two housings 100; in the spraying process, as the water mist is filled in the water tank 110 to generate certain weight, a user can drag the base 140 by hand, so that potential safety hazards caused by falling of equipment are avoided; meanwhile, the equipment can be placed on the ground through the base 140 when in use, so that the equipment is effectively prevented from being damaged due to inclination.

In an embodiment of the present invention, a line sheath 150 is provided at one side of the housing 100; when water and chemical liquid are injected into the water tank 110, the user may scatter and leak the water and chemical liquid to the outside, and the power line is protected by the line sheath 150, thereby preventing the power line from being shorted.

In the embodiment of the present invention, a plurality of air compensating ports 241 are formed on the outer surface of the electrostatic nozzle cover 240; after the high-pressure swirl airflow flows into the electrostatic nozzle cover 240, the hole wall of the air compensating port 241 is 45 degrees according to the coanda effect principle, which is favorable for the high-pressure swirl airflow to form a protective layer capable of rotating the airflow in a homeotropical manner in the electrostatic nozzle cover 240.

In the embodiment of the present invention, the inner side of the electrostatic ring 250 is provided with an internal thread; the matching of the internal thread with the homeotropic swirl flow makes the ejected mist droplets maintain a straight line state and increases the ejection distance, thereby enhancing the reliability of the electrostatic ring 250.

In the embodiment of the present invention, the materials of the valve 232, the nozzle 233 and the electrostatic ring 250 are titanium metal; the titanium metal has stronger corrosion resistance, so that the aim of reducing the corrosion of the medicine to the valve 232, the nozzle 233 and the electrostatic ring 250 is fulfilled, and the service life of the electrostatic ring 250 is prolonged.

In the embodiment of the present invention, the air flow inside the electrostatic nozzle cap 240 is a 360 ° rotating air flow or a parallel air flow.

Referring to fig. 4, the working method provided by the embodiment of the invention is shown;

s1, starting the direct current fan 120, inputting high-pressure air flow into the fairing 210 and the electrostatic spray head 230 by the direct current fan 120, generating high-pressure vortex air flow when the high-pressure air flow meets the impeller 231, forming a Venturi effect at the nozzle 233, generating a negative pressure area around the nozzle 233, and pumping out liquid in the water tank 110 under the action of negative pressure.

S2, the valve 232 is opened while the liquid is pumped out of the water tank 110, and the liquid is shredded under the action of intense high-pressure vortex airflow at the nozzle 233 to form fine mist aerosol.

S3, after high-pressure air flow is input into the electrostatic spray head 230, bernoulli effect is generated, negative pressure is generated at the air supplementing port 241 of the electrostatic spray head cover 240 and the through hole 234 at the rear end of the electrostatic spray head 230, and external air is sucked into the electrostatic spray head 230.

S4, sucking the aerosol droplets into the electrostatic spray head 230 to wrap the aerosol droplets to form a protective layer, so that the aerosol droplets are sprayed from the electrostatic spray head 230.

Example two

Referring to fig. 5, the air supply port 241 is an oval hole, which is beneficial for the high-pressure swirl air flow to form a protection layer capable of rotating the air flow in the electrostatic nozzle cover 240, so that the universality of the electrostatic nozzle cover 240 is enhanced.

Example III

Referring to fig. 6-7, the air flow inside the electrostatic nozzle cap 240 is a 360 ° rotating air flow. The air supplementing port 241 is a rectangular hole rotating in the same direction as the spiral direction of the impeller in the electrostatic spray head 230, a part of high-pressure vortex air flow in the electrostatic spray head 230 is sprayed out of the through hole to form 360-degree rotating air flow, the air supplementing port 241 formed in the same direction as the 360-degree rotating air flow enters the electrostatic spray head cover to form a 360-degree rotating air flow protection layer, and meanwhile, protective air flow and spraying air flow can be blown out in the same rotating direction, so that mist drops can be ensured to be in the electrostatic ring 250, and the mist drops can be prevented from being farther from being sprayed under the premise of collision with the electrostatic ring due to the kinetic energy of the protective air flow.

Specifically, the working principle of the electrostatic aerosol spray sterilizer and the working method thereof is as follows: in the using process of the device, a user injects water and liquid medicine into the water tank 110, lifts the device through the lifting handle 130 to perform spraying operation, and can hold the base 140 by hand under the condition that the weight of the water tank 110 is heavy, so that the device is effectively prevented from falling; by electrically connecting the direct current fan 120 with the high voltage generator module 212, the direct current fan 120 is electrified to input high pressure airflow into the fairing 210 and the electrostatic spray head 230, high pressure vortex airflow is generated when the high pressure airflow meets the impeller 231, a negative pressure area is generated around the nozzle 233 according to the venturi effect principle, liquid in the water tank 110 is pumped out under the negative pressure effect, and is torn up under the action of intense high pressure vortex airflow at the nozzle 233, so that fine mist aerosol is formed; according to the electrostatic induction principle, in the process, the electrostatic spray head 230 with charges generates secondary atomization when the fog drops are sprayed, the charging time of the fog drops is increased by the secondary charging, the charge-to-mass ratio of the fog drops is improved, the adhesiveness of the fog drops is increased, and the utilization rate of spraying can be effectively improved; meanwhile, under the action of negative pressure generated in the electrostatic spray head 230, air is sucked into the electrostatic spray head 230 from the air supplementing port 241 of the electrostatic spray head cover 240 and the through hole 234 at the rear end of the electrostatic spray head 230, aerosol droplets in the electrostatic spray head 230 can be wrapped to form a protective layer, so that the mist is reduced to be contacted with the side wall of the electrostatic spray head cover 240, the droplets are prevented from being adsorbed on the inner wall of the electrostatic spray head cover 240 to cause dripping, the waste of the droplets is reduced, the utilization rate of the droplets is improved, and further short circuit of a high-voltage electric field is caused, so that the capability of carrying the mist is lost.

It should be noted that, specific model specifications of the dc fan 120 and the high voltage generator module 212 need to be determined by selecting a model according to actual specifications of the device, and a specific model selection calculation method adopts the prior art, so that detailed descriptions thereof are omitted.

The power supply of the dc fan 120 and the high voltage generator module 212 and the principle thereof will be apparent to those skilled in the art and will not be described in detail herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrostatic aerosol spray sterilizer, comprising:

the device comprises two shells (100), wherein the two shells (100) are fixedly connected through bolts, a water tank (110) is arranged in the shells (100), a direct-current fan (120) is arranged on one side of the water tank (110), and a rubber sleeve (121) is arranged on one side of the direct-current fan (120);

the spray head assembly (200), spray head assembly (200) includes radome fairing (210), shower nozzle cover (220), electrostatic spray head (230), electrostatic spray head cover (240) and electrostatic ring (250), radome fairing (210) pass through the bolt with two casing (100) fixed connection, the inside of radome fairing (210) is provided with fan clamp plate (211), high-pressure generator module (212) are installed on the right side of fan clamp plate (211), the inside fixedly connected with fixed cover (213) of radome fairing (210), the inside of fixed cover (213) is connected with butt joint mouth (2131) through the hose, the one end of butt joint mouth (2131) is through connecting pipe with water tank (110) intercommunication, shower nozzle cover (220) threaded connection in the one end of radome fairing (210), one end threaded connection of shower nozzle cover (220) has electrostatic spray head (230), one side of electrostatic spray head (230) surface has seted up through-hole (234), the inside of electrostatic spray head (230) is provided with impeller (231), one side of impeller (231) is fixedly connected with valve (232), the other side of impeller (231) is connected with the other end (233) is through connecting pipe (2131), the electrostatic nozzle cover (240) is in threaded connection with one end of the electrostatic nozzle (230), and the electrostatic ring (250) is arranged on the inner side of the electrostatic nozzle cover (240);

the outer surface of the electrostatic nozzle cover (240) is provided with a plurality of air supplementing openings (241), the plurality of air supplementing openings (241) are rectangular holes which are parallel, elliptical holes or rectangular holes which rotate in a homeopathic manner, and the air flow in the electrostatic nozzle cover (240) is 360-degree rotating air flow or parallel air flow;

the hole wall of the air supplementing opening (241) is 45 degrees; when the air supply ports (241) are elliptical holes, the high-pressure vortex air flow forms a protective layer capable of rotating the air flow in the static spray head cover (240);

when the air supplementing opening (241) is a rectangular hole rotating in the same direction as the impeller (231) in the electrostatic spray head (230), a part of high-pressure vortex air flow in the electrostatic spray head (230) sprays 360-degree rotating air flow from the through hole (234), and the air supplementing opening (241) opening in the same direction as the 360-degree rotating air flow enters the electrostatic spray head cover (240) to form a 360-degree rotating air flow protection layer, and meanwhile, the protection air flow and the spraying air flow can be blown out in the same rotating direction, so that mist drops can be ensured to be in the electrostatic ring (250) and restrained by the kinetic energy of the protection air flow;

an internal thread is arranged on the inner side of the electrostatic ring (250).

2. An electrostatic aerosol spray sterilizer as claimed in claim 1, wherein a liquid charging filter screen (111) is provided above the water tank (110).

3. An electrostatic aerosol spray sterilizer as claimed in claim 1, wherein the upper surfaces of both the housings (100) are integrally formed with handles (130).

4. An electrostatic aerosol spray sterilizer as claimed in claim 1, wherein a base (140) is fixedly connected between the two housings (100) and is located on the lower surfaces of the two housings (100).

5. An electrostatic aerosol spray sterilizer as claimed in claim 1, wherein a side of the housing (100) is provided with a line jacket (150).

6. An electrostatic aerosol spray sterilizer as claimed in claim 1, wherein the material of the valve (232), the nozzle (233) and the electrostatic ring (250) is titanium metal.

7. A method of operation using an electrostatic aerosol spray sterilizer as claimed in any one of claims 1 to 6, comprising the steps of:

s1, starting a direct current fan (120), inputting high-pressure air flow into a fairing (210) and an electrostatic spray head (230) by the direct current fan (120), generating high-pressure vortex air flow when the high-pressure air flow meets an impeller (231), forming a Venturi effect at a nozzle (233), generating a negative pressure area around the nozzle (233), and pumping out liquid in a water tank (110) under the negative pressure effect;

s2, opening a valve (232) while the liquid is pumped out of the water tank (110), and shredding the liquid under the action of intense high-pressure vortex airflow at the nozzle (233) to form fine mist aerosol;

s3, generating Bernoulli effect after inputting high-pressure air flow into the electrostatic spray head (230), and generating negative pressure at the air supplementing port (241) of the electrostatic spray head cover (240) and the through hole (234) at the rear end of the electrostatic spray head (230) to suck external air into the electrostatic spray head (230);

s4, sucking the inside of the electrostatic spray head (230) to wrap aerosol droplets to form a protective layer so as to spray out of the electrostatic spray head (230).