阅读说明：本技术 一种修复光伏组件玻璃用减反增透液及其制备方法 (Antireflection and permeation-increasing liquid for repairing photovoltaic module glass and preparation method thereof ) 是由 林建伟 张付特 孙海龙 唐邓 于 2020-12-23 设计创作，主要内容包括：本发明涉及一种修复光伏组件玻璃用减反增透液及其制备方法,其制备方法是将水性有机胺添至低级醇,调节溶液pH至碱性,搅拌下缓慢滴加有机硅氧烷,反应,升温,缓慢减压蒸馏,使溶液pH为中性,降温,静置,得二氧化硅溶胶1；将聚丙烯酸和水性有机胺的混合溶液缓慢加至低级醇,搅拌均匀,缓慢滴加有机硅氧烷,反应,升温,缓慢减压蒸馏,使溶液pH为中性,静置,得二氧化硅溶胶2；取二氧化硅溶胶1和二氧化硅溶胶2,加水、异丙醇、乙醇、正丙醇、甲醇、丙二醇甲醚、乙酰丙酮和加硬剂,用pH调节剂将溶液pH调至2-3,即得能常温自干、耐性好、长效自清洁亲水防污、光透光率高的修复光伏组件玻璃用减反增透液。(The invention relates to a antireflection and permeability-increasing liquid for repairing photovoltaic module glass and a preparation method thereof, wherein the preparation method comprises the steps of adding aqueous organic amine to lower alcohol, adjusting the pH value of a solution to be alkaline, slowly dropwise adding organic siloxane while stirring, reacting, heating, slowly distilling under reduced pressure to make the pH value of the solution neutral, cooling, and standing to obtain silicon dioxide sol 1; slowly adding the mixed solution of polyacrylic acid and aqueous organic amine to lower alcohol, uniformly stirring, slowly dropwise adding organic siloxane, reacting, heating, slowly distilling under reduced pressure to make the pH of the solution neutral, and standing to obtain silicon dioxide sol 2; taking the silica sol 1 and the silica sol 2, adding water, isopropanol, ethanol, n-propanol, methanol, propylene glycol methyl ether, acetylacetone and a hardening agent, and adjusting the pH of the solution to 2-3 by using a pH regulator to obtain the anti-reflection and permeability-increasing liquid for repairing photovoltaic module glass, which can be self-dried at normal temperature, has good resistance, long-acting self-cleaning, hydrophilic and antifouling properties and high light transmittance.)

1. A preparation method of a antireflection and permeation-increasing liquid for repairing photovoltaic module glass is characterized by comprising the following steps:

step one, adding aqueous organic amine into lower alcohol, adjusting the pH value of the solution to 9-10, slowly dripping organic siloxane under continuous stirring, raising the temperature after reaction, slowly distilling under reduced pressure to make the pH value of the solution to 6.8-7.2, cooling, and standing to obtain silicon dioxide sol 1;

step two, slowly adding a mixed solution of polyacrylic acid and aqueous organic amine into lower alcohol, stirring uniformly, slowly dropwise adding organic siloxane, reacting, raising the temperature, slowly distilling under reduced pressure to enable the pH value of the solution to be 6.8-7.2, and standing to obtain silicon dioxide sol 2;

and step three, taking a certain amount of the silicon dioxide sol 1 and the silicon dioxide sol 2, adding water, isopropanol, ethanol, n-propanol, methanol, propylene glycol methyl ether, acetylacetone and a hardening agent, and adjusting the pH of the solution to 2-3 by using a pH regulator to obtain the antireflection and permeation-increasing liquid for repairing the photovoltaic module glass.

2. The method for preparing a liquid for decreasing and increasing the reflection for repairing photovoltaic module glass as claimed in claim 1, wherein the particle size of the silica sol 1 is 5-10 nm.

3. The method for preparing a liquid for decreasing and increasing the reflection for repairing photovoltaic module glass as claimed in claim 2, wherein the silica sol 2 has a hollow structure and a particle size of 40-50 nm.

4. The method for preparing a liquid for decreasing and increasing the reflection for repairing photovoltaic module glass as claimed in claim 1, wherein in the step one, the reaction time is 5h, and the temperature is raised to 50 ℃; the standing time was two weeks.

5. The method for preparing a liquid for decreasing and increasing the reflection for repairing photovoltaic module glass as claimed in claim 1, wherein in the second step, the reaction time is 6h, and the temperature is raised to 50 ℃; the standing time is 48 h.

6. The method for preparing the antireflection liquid-permeable material for repairing photovoltaic module glass according to claim 1, wherein in the first step and the second step, the aqueous organic amine is ammonia water, ethanolamine, ethylamine or butylamine; the lower alcohol is methanol, ethanol, butanol, n-propanol or isopropanol; the organic siloxane is tetraethyl orthosilicate or tetrabutyl orthosilicate; the slow dropping speed of the organic siloxane is 5-6 drops per second.

7. The method as claimed in claim 1, wherein in the step two, the molecular weight of the polyacrylic acid is 2000-8000.

8. The method for preparing the antireflection and permeability-increasing liquid for repairing the photovoltaic module glass according to claim 1, wherein in the third step, the mass percentages of the components are as follows:

0.5-1% of silica sol 1, 0.5-1% of silica sol 2, 10-20% of water, 4-6% of isopropanol, 7-17% of ethanol, 5-10% of n-propanol, 40-50% of methanol, 5-12% of propylene glycol monomethyl ether, 0.1-0.3% of acetylacetone and 0.1-0.5% of hardening agent.

9. The method for preparing a liquid for decreasing and increasing the permeability of a photovoltaic module glass as claimed in claim 1, wherein in the third step, the hardening agent is one or more of silane coupling agents such as KH560, HK570, methyl triethoxysilane, ethyl polysilicate and dimethyl diethoxysilane; the pH regulator is methanesulfonic acid, hydrochloric acid, nitric acid or sulfuric acid.

10. A liquid for reducing and increasing the reflection for repairing photovoltaic module glass, which is prepared by the method for preparing the liquid for reducing and increasing the reflection for repairing photovoltaic module glass according to any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of nano material synthesis, and particularly relates to a reflection reducing and permeation enhancing liquid for repairing photovoltaic module glass and a preparation method thereof.

Background

With the increasing consumption of traditional energy, new environmental-friendly clean energy such as solar energy attracts people's extensive attention. Among them, the front surface of the solar cell is a glass surface layer, and the higher the transmittance of sunlight on the glass surface layer is, the more the power generation amount of the solar cell tends to increase. Therefore, various large glass manufacturers plate antireflection film layers on the surfaces of the glass so as to improve the light transmittance: the light transmittance of the non-coated glass at the 380-1100 waveband is only 90.6 percent; and the light transmittance of the coated glass is 93.4%, which improves the light transmittance by more than 2%. However, after the solar power station is used outdoors for a long time, due to the influence of weather environments such as dust shielding, sand blowing, acid rain erosion and the like, the antireflection film layer on the glass surface of the solar power station is damaged, so that the antireflection effect is lost, and how to recover and maintain the light transmittance and the stain resistance of the photovoltaic module of the solar cell becomes a current urgent need. In addition, outdoor photovoltaic modules require repair fluids to be cured at room temperature; and after the damaged coating film is repaired, the transmittance of the original coating film is not damaged, and the long-term transmittance of the coating film is kept so as to meet various aging standards of the coated glass.

In contrast, patent CN 107383949 a discloses a hydrophobic glass antireflection coating solution, which is prepared by hydrolyzing perfluoroalkylsilane and common siloxane in an acidic system and an alkaline system, respectively, and then mixing the two coating solutions to obtain the glass antireflection coating solution. In the patent CN102352184A, an acidic catalyst is used, triton is used as a surfactant to synthesize a coating solution, siloxane is coated again, and pH is adjusted to 6.8-7.8 to obtain a sol, which only gives a sol stability test, but does not mention the anti-reflection effect. In the invention CN 103013189A, two or more silica sols are mixed, and then different metal oxides such as titanium dioxide, zirconium dioxide and the like are added to obtain an anti-reflection liquid, and finally, the curing temperature is required to be more than 100 ℃. In the patent CN 105130205A, the glass-reinforced liquid is synthesized by using a silicon source mixed by tetraethoxysilane and methyltriethoxysilane under an acidic system. Therefore, most of the coating solutions are prepared by adopting an acid catalyst at present to improve the compactness of the coating, but the transmittance of the coating is often insufficient. The nano coating prepared by the alkaline catalyst has high penetration, often has insufficient compactness, and influences the tolerance (such as wear resistance, aging resistance and the like) of the coating film. Therefore, there is a need for an improved method for preparing a reflection reducing and permeability increasing solution for repairing photovoltaic module glass, which can be self-dried at normal temperature, has good resistance, long-term self-cleaning, hydrophilic and antifouling properties and high light transmittance.

Disclosure of Invention

One of the purposes of the invention is to overcome the defects of the prior art and provide a preparation method of the antireflection and permeability-increasing liquid for repairing photovoltaic module glass, so as to prepare the antireflection and permeability-increasing liquid for repairing photovoltaic module glass, which can be self-dried at normal temperature, has good resistance, long-acting self-cleaning, hydrophilic and antifouling properties and high light transmittance.

The second purpose of the invention is to overcome the defects of the prior art and provide a reflection reducing and permeation increasing solution for repairing photovoltaic module glass, which is an inorganic nano silica sol modified by a functional organic ligand, and can adopt an inorganic nano sol coating technology to form a film layer below 100nm on the surface of the photovoltaic module glass by using construction modes such as spraying, rolling coating, smearing and the like, wherein the film layer has high transmittance in a wavelength range of 380 and 1100nm, and can inhibit static electricity from being generated on the surface of a base material, so that stains are not easy to attach to the base material, and the power generation capacity of a photovoltaic module is further improved.

Based on the above, the invention discloses a preparation method of a reflection reducing and permeation enhancing liquid for repairing photovoltaic module glass, which comprises the following steps:

step one, adding aqueous organic amine into lower alcohol, adjusting the pH value of the solution to 9-10, slowly dripping organic siloxane under continuous stirring, raising the temperature after reaction, slowly distilling under reduced pressure to make the pH value of the solution to 6.8-7.2, cooling, and standing to obtain silicon dioxide sol 1;

step two, slowly adding a mixed solution of polyacrylic acid and aqueous organic amine into lower alcohol, stirring uniformly, slowly dropwise adding organic siloxane, reacting, raising the temperature, slowly distilling under reduced pressure to enable the pH value of the solution to be 6.8-7.2, and standing to obtain silicon dioxide sol 2;

and step three, taking a certain amount of the silicon dioxide sol 1 and the silicon dioxide sol 2, adding water, isopropanol, ethanol, n-propanol, methanol, propylene glycol methyl ether, acetylacetone and a hardening agent, and adjusting the pH of the solution to 2-3 by using a pH regulator to obtain the antireflection and permeation-increasing liquid for repairing the photovoltaic module glass.

Preferably, the silica sol 1 has a particle size of 5 to 10 nm.

Further preferably, the silica sol 2 has a hollow structure, and the particle size thereof is 40 to 50 nm.

The preparation method comprises the following steps of firstly synthesizing two different silica sols under an alkaline condition: wherein one is silica sol with small particle size, namely silica sol 1, the particle size of which is 5-10nm, and the other is a hollow structure, namely silica sol 2 with the particle size of 40-50 nm; and then removing alkalinity of the two types of silica sol to be neutral (namely pH is 6.8-7.2), adding various solvents, and adjusting the solution to be acidic to prepare the anti-reflection and permeability-increasing liquid for repairing the photovoltaic module glass, which can be self-dried at normal temperature, has good resistance, is long-acting, self-cleaning, hydrophilic and antifouling, and has high light transmittance. Wherein, two kinds of silica sol with different particle diameters are used, and the silica sol with small particle diameter can be filled in the gap of the silica sol with large particle diameter, so that the cured film layer is more compact, and the performances of wear resistance, aging resistance and the like of the film layer can be further improved.

Preferably, in the first step, the reaction time is 5h, and the temperature is increased to 50 ℃; the standing time was two weeks.

Preferably, in the second step, the reaction time is 6h, and the temperature is increased to 50 ℃; the standing time is 48 h.

Preferably, in the first step and the second step, the aqueous organic amine is ammonia water, ethanolamine, ethylamine or butylamine; the lower alcohol is methanol, ethanol, butanol, n-propanol or isopropanol; the organic siloxane is tetraethyl orthosilicate or tetrabutyl orthosilicate; the slow dropping speed of the organic siloxane is 5-6 drops per second.

Preferably, in the second step, the molecular weight of the polyacrylic acid is 2000-8000.

Preferably, in the third step, the mass percentages of the components are as follows:

0.5-1% of silica sol 1, 0.5-1% of silica sol 2, 10-20% of water, 4-6% of isopropanol, 7-17% of ethanol, 5-10% of n-propanol, 40-50% of methanol, 5-12% of propylene glycol monomethyl ether, 0.1-0.3% of acetylacetone and 0.1-0.5% of hardening agent.

Preferably, in the third step, the hardening agent is one or more of silane coupling agents such as KH560, HK570, methyl triethoxysilane, ethyl polysilicate and dimethyl diethoxy silane; the pH regulator is methanesulfonic acid, hydrochloric acid, nitric acid or sulfuric acid.

The invention also discloses a antireflection and permeability-increasing liquid for repairing the photovoltaic module glass, which is prepared by adopting the preparation method of the antireflection and permeability-increasing liquid for repairing the photovoltaic module glass.

Compared with the prior art, the invention at least comprises the following beneficial effects:

because the photovoltaic module is used in a severe environment for a long time, the coating film on the surface of the glass of the photovoltaic module is easy to damage, and the invention provides a preparation method of the antireflection and permeability-increasing liquid for repairing the damaged coating film. The preparation method comprises the steps of respectively synthesizing two different nano silica sols under an alkaline condition to form high-transmittance silica sols with a loose structure and a low refractive index, then removing the alkalinity to be neutral to obtain silica sols 1 and 2, mixing the silica sols 1 and 2, adding various solvents, adjusting the solution to be acidic, and enabling the surfaces of the silica sols to form more hydrogen bonds, wherein the film layers of the obtained anti-reflection and anti-reflection liquid are more compact after the anti-reflection and anti-reflection liquid is solidified to form a film; therefore, the film layer has high light transmittance, excellent wear resistance and aging resistance, and can keep the high light transmittance of the film layer for a long time to achieve the effect of reducing reflection and increasing reflection for a long time. Moreover, the antireflection and permeability-increasing solution prepared by the method can adopt an inorganic nano sol coating technology, and a coating layer with the thickness of less than 100nm is formed on the surface of the photovoltaic module glass by using construction modes such as spraying, rolling coating, smearing and the like so as to repair the damaged coating film on the surface of the photovoltaic module glass, the coating layer can be self-dried at normal temperature, the ultra-thin film layer after self-drying and curing has a smaller water contact angle, and can inhibit the surface of a base material from generating static electricity, so that stains are not easy to attach to the base material; therefore, the film layer has the functions of normal-temperature self-drying and long-acting self-cleaning and hydrophilic.

In conclusion, the prepared anti-reflection and permeability-increasing liquid for repairing the photovoltaic module glass can repair a damaged coating film on the surface of the photovoltaic module glass and can improve the power generation capacity of the photovoltaic module. The prepared antireflection and permeability-increasing film layer for repairing the photovoltaic module glass can improve the light transmittance of the glass by more than 2 percent within the wavelength range of 380-1100 nm; the film layer can repair the photovoltaic module for more than 4 years, and compared with the photovoltaic module which is not repaired, the power generation capacity of the repaired photovoltaic module is increased by more than 2%.

Drawings

FIG. 1 is a block diagram of a glass surface after application of a liquid antireflective coating.

Fig. 2 is a TEM image of the nano silica sol 1 synthesized in example 1.

Fig. 3 is a TEM image of the nano silica sol 2 synthesized in example 2.

FIG. 4 is a graph showing data on light transmittance of glass before and after the antireflection solution of example 3 was sprayed on the surface of the glass.

FIG. 5 is a graph of water contact angle data for the antireflection and permeation enhancer solutions of examples 1-3 after forming a film layer on a glass surface.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example 1

The preparation method of the antireflection and permeation-increasing liquid for repairing photovoltaic module glass comprises the following steps:

step one, adding 500g of isopropanol into a reactor, slowly dropwise adding butylamine solution into the isopropanol, adjusting the pH of the solution to 9, slowly dropwise adding 150mL of tetraethyl orthosilicate by using a dropping funnel, stirring for 5 hours after dropwise adding, adjusting the pH of the solution to 6.8-7.2 by using a reduced pressure distillation device, and standing for 2 weeks to obtain the silica sol 1.

And step two, adding 500g of anhydrous methanol into the reactor, slowly adding a mixed solution of 1.2g of polyacrylic acid and 13g of ammonia water into the methanol, uniformly stirring, slowly dropwise adding 14mL of tetraethyl orthosilicate by using a dropping funnel, stirring for 6 hours after dropwise adding, adjusting the pH value of the solution to 6.8-7.2 by using a reduced pressure distillation device, and standing for 2 days to obtain the silicon dioxide sol 2.

And step three, taking 1% of silica sol 1 (wherein 1% is the mass percentage, the same below) and 0.5% of silica sol 2, adding 15% of water, 6% of isopropanol, 16.7% of ethanol, 10% of n-propanol, 40% of methanol, 10% of propylene glycol monomethyl ether, 0.3% of acetylacetone and 0.5% of methyltriethoxysilane, and adjusting the pH of the solution to 2 by using methanesulfonic acid to obtain the antireflection and permeation-increasing liquid for repairing photovoltaic module glass.

Example 2

The preparation method of the antireflection and permeation-increasing liquid for repairing photovoltaic module glass comprises the following steps:

step one, adding 500g of isopropanol into a reactor, slowly dropwise adding an ethanolamine solution into the isopropanol, adjusting the pH of the solution to 9, slowly dropwise adding 150mL of tetrabutyl orthosilicate by using a dropping funnel, stirring for 5 hours after the dropwise adding is finished, adjusting the pH of the solution to 6.8-7.2 by using a reduced pressure distillation device, and standing for 2 weeks to obtain the silicon dioxide sol 1.

And step two, adding 500g of absolute ethyl alcohol into the reactor, slowly adding a mixed solution of 1g of polyacrylic acid and 15g of butylamine into the absolute ethyl alcohol, uniformly stirring, slowly dropwise adding 14mL of tetraethyl orthosilicate by using a dropping funnel, stirring for 6 hours after dropwise adding, adjusting the pH value of the solution to 6.8-7.2 by using a reduced pressure distillation device, and standing for 2 days to obtain the silicon dioxide sol 2.

And step three, taking 1% silica sol 1 and 1% silica sol 2, adding 10% of water, 5% of isopropanol, 15.4% of ethanol, 10% of n-propanol, 45% of methanol, 12% of propylene glycol methyl ether, 0.2% of acetylacetone and 0.4% of KH560, and adjusting the pH of the solution to 3 by using hydrochloric acid to obtain the antireflection liquid-increasing liquid for repairing the photovoltaic module glass.

Example 3

The preparation method of the antireflection and permeation-increasing liquid for repairing photovoltaic module glass comprises the following steps:

step one, adding 500g of isopropanol into a reactor, slowly dropwise adding an ammonia water solution into the isopropanol, adjusting the pH of the solution to 9, slowly dropwise adding 100mL of tetraethyl orthosilicate by using a dropping funnel, stirring for 5 hours after dropwise adding, adjusting the pH of the solution to 6.8-7.2 by using a reduced pressure distillation device, and standing for 2 weeks to obtain the silica sol 1.

And step two, adding 500g of isopropanol into the reactor, slowly adding a mixed solution of 0.8g of polyacrylic acid and 15g of ammonia water into the isopropanol, uniformly stirring, slowly dropwise adding 14mL of tetraethyl orthosilicate by using a dropping funnel, stirring for 6 hours after dropwise adding, adjusting the pH value of the solution to 6.8-7.2 by using a reduced pressure distillation device, and standing for 2 days to obtain the silicon dioxide sol 2.

And step three, taking 0.5% silica sol 1 and 1% silica sol 2, adding 13% of water, 6% of isopropanol, 6.9% of ethanol, 10% of n-propanol, 50% of methanol, 12% of propylene glycol methyl ether, 0.1% of acetylacetone and 0.5% of KH570, and adjusting the pH of the solution to 2 by using methanesulfonic acid to obtain the antireflection and permeation-increasing liquid for repairing the photovoltaic module glass.

Comparative example 1

A liquid for decreasing the reflection and increasing the liquid of this comparative example was prepared in substantially the same manner as in example 1 except that: instead, the pH of the solution in step three of example 1 was adjusted to 9 to obtain the permeability-reducing and increasing liquid of this comparative example.

Comparative example 2

A method for producing a liquid for decreasing the reflection and increasing the liquid of this comparative example was carried out by adjusting the pH of the silica sol 1 produced in example 1 to 8.

Comparative example 3

A method for producing a liquid for decreasing the reflection and increasing the liquid of this comparative example was carried out by adjusting the pH of the silica sol 2 prepared in example 1 to 2.

Performance testing

1. The nano-silica sol 1 synthesized in example 1 and the nano-silica sol 2 synthesized in example 2 were subjected to TEM tests, respectively, and the test results thereof are shown in fig. 2 to 3.

As can be seen from FIG. 2, the particle size of the silica sol 1 is 5 to 10 nm; as can be seen from FIG. 3, the silica sol 2 had a hollow structure and a particle diameter of 40 to 50 nm. Referring to fig. 1, in the invention, two silica sols with different particle sizes are used, and the silica sol with a small particle size can be filled in the gap of the silica sol with a large particle size, so that the cured film layer is more compact, and the wear resistance, aging resistance and other properties of the film layer are further improved.

2. The antireflection liquid for repairing photovoltaic module glass in examples 1-3 is respectively sprayed on the surface of glass to form a film layer, and the room-temperature self-drying property, the water contact angle, the light transmittance, the wear resistance, the aging resistance, the power generation amount gain and other properties of the antireflection liquid are respectively tested according to line marks JC T2170-2013, and the test results are shown in tables 1-4 and figures 4-5.

Referring to fig. 4 to 5, the water contact angles of the anti-reflection liquid-permeation-increasing coating films of examples 1 to 3 are 16 to 30 degrees, and thus the anti-reflection liquid-permeation-increasing coating films have smaller water contact angles, so that stains are not easy to attach to a substrate, and the film layers have excellent long-acting self-cleaning hydrophilic functions.

TABLE 1 comparison of drying time of the antireflection and permeation enhancing liquid-room temperature plating films of examples 1 to 3 at 110nm

As is clear from Table 1, the anti-reflection and permeation-enhancing liquids of examples 1 to 3 have excellent room-temperature self-drying properties, and when the film thickness is 110nm, the time required for self-drying, curing and film-forming is only 3.5 to 4.2min, and the room-temperature self-drying speed is high.

TABLE 2 light transmittance data after antireflection and permeation-increasing liquid coating films of examples 1 to 3 and comparative examples 1 to 3 and light transmittance data after abrasion resistance test

In Table 2, the room temperature is 25 ℃.

As can be seen from table 2, the antireflection liquid-permeability-increasing film layers of examples 1 to 3 all had excellent light transmittance, and the transmittance after the abrasion resistance test was high. If the pH value of the antireflection and permeation-increasing liquid is adjusted to be alkaline, the transmittance of the film layer after the abrasion resistance test is reduced as in comparative example 1; if the silica sol 1 is adopted alone (the pH is alkaline), as in comparative example 2, the light transmittance of the film layer after the abrasion resistance experiment is also obviously reduced; when silica sol 2(pH 2) alone was used, the light transmittance after the abrasion resistance test of the film layer was also significantly decreased as in comparative example 3. Therefore, only when the silica sol 1 and the silica sol 2 were mixed and the pH was adjusted to be acidic, the film layer thereof could exhibit a high light transmittance after the abrasion resistance test.

TABLE 3 comparative data of light transmittance before and after various aging of glass coated with antireflection coating solution of example 1

As can be seen from table 3, after the anti-reflection and anti-reflection coating film of example 1 is formed, the anti-aging performance is good, so that the high light transmittance of the film layer can be maintained for a long time, and the anti-reflection and anti-reflection effect can be achieved for a long time.

TABLE 4 comparative data of generated energy before and after coating of single photovoltaic module

As can be seen from table 4, the power generation amount gain of the photovoltaic module after the repair is 2% or more.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

The technical solutions provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the descriptions of the above examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.