180 results about "Electro spray" patented technology

The invention relates to a counter-ion adsorption high-voltage electrostatic spraying device and application thereof to preparation of a food sugar coating, and belongs to the technical field of equipment machinery and food processing. The device comprises a material conveying system, a high-voltage electrostatic spraying system, a sugar liquid supply system, a gas supply system, a sugar liquid recovery system, a microwave vacuum drying system and a control cabinet, the sugar liquid supply system and the gas supply system are both connected with the high-voltage electrostatic spraying system, the material conveying system is arranged below the high-voltage electrostatic spraying system, the material conveying system is connected with the microwave vacuum drying system, and the sugar liquid recovery system is further arranged below the material conveying system; the above systems are all controlled by a control cabinet. Through pulse switching of a high-voltage electrostatic field and a sugar liquid material, counter-ion charge accumulation of sprayed sugar liquid is realized, namely, positive charge sugar liquid (chitosan and the like) and negative charge sugar liquid (Arabic gum, carrageenan and the like) are alternately sprayed under the high-voltage electrostatic field, so that electrostatic adsorption and directional deposition of the sugar liquid on the surface of food are realized.

The invention relates to a method for continuously assembling a bipolar membrane, and bipolar membrane thereof. The method comprises the steps of: - continuously supplying and transporting a substrate in a process direction; - applying, during transporting in the process direction, at least one catalyst layer to the substrate, wherein applying the at least one catalyst layer comprises the steps of: - electrospinning and / or electro spraying and / or centrifugal spinning and / or electrocentrifugal spinning a resin; - electrospinning and / or electro spraying and / or centrifugal spinning and / or electrocentrifugal spinning a catalyst; and - electrospinning and / or electro spraying and / or centrifugal spinning and / or electrocentrifugal spinning a further resin; and - providing at least one cation exchange membrane layer and providing at least one anion exchange membrane layer that are operatively connected to each of the other layers, wherein all layers extend in a plane containing the process direction.

The invention relates to the field of printing system equipment, and discloses a piezoelectric spray valve which comprises a valve shell, a piezoelectric control assembly, a nozzle firing pin and a glue inlet module, the glue inlet module is fixedly arranged at the lower end of the valve shell, and a nozzle for spraying glue and a threaded sleeve for fixing the nozzle are arranged at the lower end of the glue inlet module. The piezoelectric control assembly is arranged in the valve shell and connected with a voltage control module, the voltage control module is provided with a lead connected with an external mechanism, one end of the nozzle firing pin is vertically arranged in the valve shell in a sliding mode and is in butt joint with the piezoelectric control assembly, and the position of the nozzle firing pin in the vertical direction is controlled by the piezoelectric control assembly. The other end of the nozzle firing pin extends into a glue inlet module at the lower end of the valve shell to control the amount of glue entering the nozzle, and a spraying range control structure is arranged at the lower end of the glue inlet module. Glue feeding amount and voltage change are automatically adjusted, spraying is regular and uniform, debugging time is saved, and the proficiency of operators is reduced.

The invention relates to the technical field of electrostatic spraying, and discloses airflow-assisted electrostatic spraying equipment, a preparation method and application, the airflow-assisted electrostatic spraying equipment comprises a material assembly used for conveying a liquid material, a coaxial needle and a triaxial displacement mechanism capable of moving in three axial directions, the material assembly is connected to an outer needle of the coaxial needle, and the airflow-assisted electrostatic spraying equipment further comprises an air source assembly, the gas source assembly is used for conveying pressure-adjustable high-pressure gas to the inner needle of the coaxial needle; a shell of the coaxial needle is connected to an electrostatic generator, and the coaxial needle is fixedly connected with a sliding block of the three-axis displacement mechanism through a needle head fixing support. Compared with electrostatic spraying without airflow assistance, the air source assembly is adopted for conveying high-pressure air, efficient and rapid spraying can be achieved, and the device is suitable for fine spraying of low-viscosity liquid and heterogeneous liquid; compared with static-free mechanical spraying, the sphericity degree of the obtained microspheres is obviously improved, the particle size is smaller and more uniform, and the fog pollution in the spraying process is reduced in a large area.

The invention provides polycaprolactone microspheres prepared on the basis of an electrostatic spraying method and a preparation method and application thereof.The preparation method comprises the steps that polycaprolactone, a compound solvent and a surfactant are mixed and subjected to electrostatic spraying, the polycaprolactone microspheres are obtained, and the compound solvent comprises formic acid, acetic acid and water; the preparation method is simple to operate, and formic acid, acetic acid and water are matched to serve as a compound solvent, so that the prepared polycaprolactone microspheres have the characteristics of narrow particle size distribution, good microsphere shape, high roundness and the like; the problems of wide particle size distribution, poor microsphere form and the like of the polycaprolactone microspheres prepared by a traditional method such as an emulsified solvent evaporation method are solved; meanwhile, the polycaprolactone microspheres with controllable particle sizes and forms can be prepared by adjusting the technological parameters of the electrostatic spraying process, such as voltage, the inner diameter of a needle head and the flow velocity of a solution.

The invention belongs to the technical field of mass spectrometry, and particularly relates to an atmospheric pressure laser dissociation-secondary electrospray ion source for micro-plastic mass spectrometry. The device comprises a laser light source, a sample table and an electrospray ion source, the sample table is used for placing a detection sample; the laser light source comprises a laser element and a laser controller, the laser element emits near-infrared laser to act on a sample, and a light absorption substance in the sample absorbs laser energy and transmits the laser energy to the micro-plastic, so that the micro-plastic generates gas; the electrospray ion source generates primary charged micro-droplets, the micro-droplets collide with gas generated by laser dissociation to generate ionization, and the micro-droplets enter the mass spectrometer to be analyzed and detected. The ion source provided by the invention is a normal-pressure ion source, sample analysis can be carried out in an open environment, and high-flux and real-time online analysis can be realized without complicated pretreatment. The method is mainly applied to analysis of micro-plastics in an environment or a living body, and a feasible technology is provided for the fields of environment analysis, biological toxicology analysis and the like.

The invention belongs to the related technical field of flexible electronic micro-nano manufacturing, and discloses a method for preparing a conductive thin film through plasma-assisted electrospray, the conductive thin film and application of the conductive thin film, and the method comprises the following steps: (1) carrying out surface modification treatment on an insulating substrate by adopting plasma to improve the charge dissipation speed and hydrophilicity of the surface of the insulating substrate; and (2) preparing a thin film on the surface of the insulating substrate in an electrostatic spraying manner to obtain the conductive thin film. The surface of the insulating substrate is subjected to plasma modification treatment to improve the charge dissipation speed and hydrophilicity of the surface of the insulating substrate, electrostatic spraying is adopted to perform electrostatic paint spraying on the surface of the insulating substrate to prepare the conductive film, and the modification treatment improves the electrofluid spraying performance of the surface of the insulating substrate; and the continuous, compact and defect-free conductive film on the surface of the insulating substrate is obtained.

The invention discloses an ionization device. Electrospray is an ionization mode, and after the electrospray is combined with a mass spectrometer or an ion mobility instrument, atoms and molecules can be analyzed or some microorganisms or cells can be directly analyzed. Based on the process that liquid fluid is atomized and expanded firstly and then gaseous fluid is compressed before entering an instrument in the electrospray process, a geometric structure cavity matched with the liquid fluid in shape is designed and used for spraying. By means of the mode that the shape is matched with the introduction process of the fluid, spray moves forwards as much as possible in a laminar flow mode, so that more stable spray fluid is obtained, and ions can be better introduced into an instrument for analysis.

The application discloses a kind of based on plasma atomization gas auxiliary electric spray ionization method, comprising the following steps: a) sample solution is introduced into electric spray needle;B) open plasma initiation device, make plasma initiation device discharge and generate plasma in plasma atomization gas gas path;C) atomization gas is introduced into plasma atomization gas gas path, and the atomization gas under the action of plasma forms plasma atomization gas;D) open high-voltage power supply, and sample solution is under the action of high-voltage electricity and plasma atomization gas and generates spray and forms sample ion, and the sample ion formed enters mass spectrometer by mass spectrometry inlet channel.This application can improve sensitivity, and under the premise that compound fragmentation dissociation does not occur, it is used for electric spray unfriendly solvent and difficult to detect low polarity compound detection, which can be compatible with normal phase liquid chromatography commonly used solvent, and can also reduce the influence of common complex matrix effect in electric spray ionization.

The present invention relates to a preparation method of a hemispherical array Li3VO4 / C anode material for lithium-ion batteries. Polyvinyl alcohol, lithium nitrate, ammonium metavanadate, and oxalic acid are added to an appropriate amount of deionized water and stirred evenly to obtain a green solution A. To construct a microreaction environment, an appropriate amount of ethylene glycol is directly measured and filled into syringes for double-needle mixed electrospray, and the mixture is collected on a rotating receiver covered with aluminum foil with a negative voltage of 2-5 kV, dried, and calcined to obtain a hemispherical array Li3VO4 / C composite material. For the first time, the present invention uses a simple double-needle electrospray to synthesize a hemispherical Li3VO4 / C composite material as an anode material for lithium-ion batteries. For the first time, ethylene glycol is used to construct a microemulsion reaction environment, and the combination of microemulsion and electrospray is used to solve the problem of difficult morphology control in electrospray. The prepared hemispherical Li3VO4 / C composite material shows excellent electrochemical performance as an anode material for lithium-ion batteries.

The present invention discloses a gas hydrate generation device based on a dual-electrode electrostatic spray method. The device includes: a high-voltage electrostatic generator, a circulation pump, a reactor, a metal capillary, an atomizing nozzle, an annular electrode, a metal grid electrode plate, a first fluid pipeline for realizing the circulation of an aqueous solution in the reactor, and a second fluid pipeline for introducing gas into the reactor; the high-voltage electrostatic generator supplies power to the metal capillary and the annular electrode; the metal capillary is inserted into the reactor from the upper wall of the reactor; the atomizing nozzle is connected to the lower end of the metal capillary, and the inner surface is insulated; the annular electrode is located below the atomizing nozzle, and the surface of the annular electrode is insulated; the metal grid electrode plate is located below the annular electrode and is grounded; the metal grid electrode plate is insulated from the reactor and the aqueous solution in the reactor. The droplets generated by atomization of the present invention have smaller particle size and better directionality, and the distribution of the fog group is more uniform, which increases the gas hydration rate.

The invention discloses an integrated electrospray thruster transmitting module based on a 3D printing technology, and belongs to the technical field of spaceflight. The integrated electrospray thruster transmitting module is an integrated component which is integrally formed through a micro three-dimensional photoetching 3D printing technology, and a continuous fluid transmission channel from a liquid supply connector at the bottom end to a transmitting nozzle at the top end is arranged in the integrated electrospray thruster transmitting module; in the fluid flowing direction, the integrated electrospray thruster transmitting module sequentially comprises a liquid supply interface layer, a multi-layer flow channel structure and a transmitting layer from bottom to top. Integrated forming and high integration of the complex micro-channel structure are achieved, the array liquid supply uniformity is improved through the forked micro-channel structure, the size of sprayed liquid drops and the single-hole flow are reduced, and therefore emitter miniaturization is achieved, and the overall emission performance and working stability of the electrospray thruster are improved.

The present application relates to the field of electrostatic spraying, and particularly relates to a structure of an adjustable electrostatic spraying nozzle, which comprises a guide cover and a plurality of detachable electrodes and a nozzle connecting structure, the guide cover is located in front of the nozzle connecting structure, the detachable electrodes are arranged at a nozzle opening, and the nozzle connecting structure is provided with a plurality of nozzles close to the side of the guide cover. The present application has the advantages of convenient use, application in different occasions, changeable charging capacity, high atomization efficiency, safety and reliability and the like.

A heating device and a mass spectrometry device of a nanoelectrospray source, the heating device comprising: a support body and a heating body arranged on the support body, the heating body being configured to apply a heating effect to an ion transmission path and being provided with an ion transmission channel for the passage of ions or charged droplets; an ion inlet of the ion transmission channel corresponding to an ion outlet of the nanoelectrospray source, and an ion outlet of the ion transmission channel corresponding to an ion inlet of the mass spectrometer. The heating device can significantly improve the atomization and desolvation capability of the nanoelectrospray source, improve the signal response and repeatability, reduce the ion cluster background noise formed by solvent molecules, improve the sensitivity, and avoid the spray stop and signal loss caused by the heat-sensitive drying of the nanoelectrospray ion source at the end of the spray needle.

The present invention relates to the technical field of electrospray extraction, and in particular, to a mass spectrometer ion source injection device; the mass spectrometer ion source injection device comprises an adsorption component and an ionization component, the adsorption component is used to adsorb VOC gaseous molecules in a sample; the ionization component comprises an ionization shell, a capillary and an aerodynamic lens, the aerodynamic lens is arranged in the ionization shell, and an ionization chamber cavity is arranged in the ionization shell; the capillary is arranged in the ionization shell, and the capillary extends into the ionization chamber cavity, and is used to provide electrospray, so that a particle beam in the ionization chamber cavity contacts with the electrospray to ionize to form sample ions; the ionization shell is also provided with an injection port connected to the outlet of the adsorption component, and a sample outlet connected to the ionization chamber cavity, and the sample outlet is used to allow the sample ions formed in the ionization chamber cavity to enter a mass spectrometer. The mass spectrometer ion source injection device of the present invention can improve injection efficiency and ionization efficiency.

The present invention discloses an automatic electrospray spraying device and method for preparing samples for mass spectrometry imaging, wherein the automatic electrospray spraying device for preparing samples for mass spectrometry imaging includes: a spray capillary; an injection mechanism whose outlet end is connected to the inlet end of the spray capillary; a high-voltage power supply electrically connected to the spray capillary; and a robotic arm for driving the movement of the spray capillary. This solution generates micron-sized droplets through the electrospray principle to achieve derivatization reagent and matrix spraying. Compared with the original technology, it has an order of magnitude improvement in droplet fineness, ensuring that the derivatization reaction does not destroy the in-situ information, and ensuring that the grain size of the matrix crystal is small and evenly distributed, ensuring the quality of mass spectrometry imaging. In addition, this solution also uses a robotic arm to operate the spraying process, making the spraying process more flexible and efficient, and can automatically absorb and replace reagents, realizing fully automatic multi-reagent spraying sample preparation, such as superimposed spraying of derivatization reagent and matrix.

The invention relates to the field of detection, in particular to a method for determining the residual quantity of methoprene and methoprene in citrus through pre-column derivatization liquid chromatography-tandem mass spectrometry, and the method comprises the following steps: S1, preparation of a standard sample and a to-be-detected sample: S11, preparation of the standard sample, and S12, preparation of the to-be-detected sample; s2, preparation and derivation of a standard sample solution and a to-be-detected sample solution: S21, extraction, S22, purification and S23, derivation; s3, measuring; s4, establishing a linear equation; and S5, analyzing the sample to be detected. The technical problems that in the prior art, the ionization efficiency of methoprene and methoprene in the electrospray process is low due to the non-polar property of methoprene and methoprene, and electrospray ionization tandem mass spectrometry detection of methoprene and methoprene lacks the sensitivity required by trace analysis can be solved. The detection sensitivity of methoprene and methoprene in citrus fruits can be obviously improved.

The present invention proposes a device for electro-droplet reaction and product collection, which includes an air chamber, a counter electrode, a sample tray, a capillary and a cover plate, wherein a cover plate is provided above the tip of the capillary in a controllable gas environment provided by the air chamber, and its inner surface is designed to be a dome-shaped structure for condensing the droplets formed by electrospray and guiding the droplets to flow back to the sample tray, thereby reducing interference with the spray operation. This circulation reflux design allows the unreacted components to be recovered, continue to be sprayed through the capillary, and circulate to participate in the reaction process, thereby significantly improving the reaction efficiency. The device has a simple structure, high stability, and a wide range of applications. It provides an efficient and reliable droplet synthesis technology platform for chemical synthesis experiments and industrial production, effectively improving the efficiency and quality of chemical synthesis, and is of great significance for expanding the application scenarios of chemical synthesis.

The invention provides expiration detection equipment which comprises a shell, a mounting plate is arranged in the shell and connected with a mass spectrometer, a fixing frame and an ion source, an EESI vacuum cavity is formed in the ion source, the inner wall of the ion source is movably connected with a first connecting arm and a second connecting arm, the first connecting arm is connected with a sample nozzle, and the second connecting arm is connected with an electrospray nozzle. The inner wall of the ion source is detachably connected with baffles, the baffles define a transmission cavity, the transmission cavity is communicated with the interior of the mass spectrometer through a sample inlet, the baffles are connected with an ion transmission pipe, a sample nozzle is communicated with a collection cover through a pipe set, and an electrospray nozzle is communicated with an ESI solvent device. By arranging the EESI vacuum cavity, the sample nozzle and the electrospray nozzle, an ESI solvent forms primary charged reagent liquid drops through the electrospray channel to be sprayed out, the primary charged reagent liquid drops serve as a primary energy charge carrier of an ion source, sample aerosol exhaled by a subject does not need to be pretreated, the detection efficiency is high, and the detection process can be continuous.

The invention provides a bidirectional thermal management system and method for a power battery based on electrostatic spraying. The bidirectional thermal management system comprises a cooling subsystem, a heating subsystem, an electrostatic spraying heat exchange plate, a high-voltage electrostatic generator, a power battery module, a battery management system and a controller, a high-temperature liquid return pipeline and a low-temperature liquid return pipeline are arranged below the electrostatic spraying heat exchange plate; the battery management system is connected with a built-in temperature sensor of the power battery module and monitors real-time temperature information of the power battery module; the heating subsystem and the cooling subsystem share an electrostatic spraying heat exchange plate; the controller judges whether the power battery module is heated or cooled according to the real-time temperature information, and then the throttle valve, the high-voltage electrostatic generator and the PTC heater are controlled to be started and stopped. The invention provides an electrostatic spraying integrated solution capable of simultaneously solving the problems of heating and cooling of the power battery, so that the heat exchange efficiency and the space utilization rate of the system are greatly improved, the heat exchange uniformity is remarkably improved, and finally, the high-efficiency low-cost bidirectional heat management of the power battery is realized.

The invention discloses a preparation method and application of a nanofiber composite carrier. A blending method is adopted, polyvinyl alcohol and waterborne polyurethane are blended to prepare a nanofiber membrane, electrostatic spraying is combined, a cross-linking agent is introduced, the mechanical performance of the membrane is further enhanced, and the nanofiber composite carrier with good biocompatibility is obtained. And preparing the nanofiber immobilized enzyme by using an adsorption method, wherein the immobilized enzyme has good catalytic activity and handling stability. For example, after the immobilized hemicellulase is repeatedly used for multiple times, 80.3% of the enzyme activity of the first time is still reserved at the eighth time. After the immobilized cellulase is repeatedly used for multiple times, 86.1% of the first enzyme activity is still reserved at the eighth time. The composite carrier disclosed by the invention has a relatively good application effect in the field of immobilized enzymes, realizes recycling of waste liquid in a viscose fiber production process, and has a good application prospect in industry.

The application discloses an electrostatic sprayer, which comprises a sprayer body, a handheld part connected with the sprayer body, a nozzle assembly arranged at one end of the sprayer body, and an electrostatic switch arranged at the other end of the sprayer body; an ion generator, a diaphragm pump and an electrostatic electrode are arranged in the sprayer body; a discharge needle is connected to the shell of the sprayer body; a solution kettle is connected to the bottom of the sprayer body; a power switch and a waterproof battery pack are arranged on the handheld part; the ion generator, the electrostatic electrode, the power switch, the discharge needle and the waterproof battery pack are connected through wires; the solution kettle, the diaphragm pump, the electrostatic electrode and the nozzle assembly are connected through a water pipe; the solution in the solution kettle flows to the electrostatic electrode through the water pipe, is charged and is sprayed out of the nozzle assembly. The application can realize human body discharge and tip discharge, and has strong waterproof performance and adsorption effect.

A system and method are provided to provide greater consistency and customization of results in charged spray implementations through improved feedback from and control of the electronic characteristics of the charging power supply. The system and method, in at least one form, use multiple levels of feedback and provide adjustments to react to the spray process.

This invention provides an in-situ MOF-modified stereocomposite polylactic acid (PLLA) micro / nanofiber self-powered filter membrane and its preparation method. The method comprises the following steps: ZIF-8 nanocrystals with uniform morphology and stable dimensions are prepared using a combination of microwave-assisted synthesis and template method. The ZIF-8 dispersion is then co-spun with a L-type polylactic acid (PLLA) / D-type polylactic acid (PDLA) blend solution using a combination of electrospraying and electrospinning to prepare the in-situ MOF-modified stereocomposite polylactic acid (PLLA) micro / nanofiber self-powered filter membrane. The prepared in-situ MOF-modified stereocomposite polylactic acid (PLLA) micro / nanofiber self-powered filter membrane exhibits controllable bead and mesoporous morphology, as well as the high specific surface area and surface activity imparted by ZIF-8, resulting in high filtration performance, excellent triboelectric output performance, and good self-cleaning ability. It has broad application prospects in the fields of personal protective equipment and intelligent monitoring.

Disclosed is an apparatus for monitoring bioaerosols, which includes a capturer configured to capture bioaerosol particles in air in a capture solution; a first droplet discharger configured to electro-spray the capture solution, in which the particles are captured, in a form of first droplets; a second droplet discharger configured to electro-spray a reagent, capable of reacting with the particles of the first droplets, in a form of second droplets; a reactor in which the first and second droplets are mixed so that the particles react with the reagent; and a measurer configured to measure the particles reacted with the reagent, wherein a size of the first droplets discharged from the first droplet discharger is controlled such that the particles are individually included in the first droplets. In accordance with such a configuration, individual particles can react with a reagent, which allows accurate bioaerosol monitoring optically.

The application discloses a nanoliter spray ionization mass spectrometry interface device, an analytical instrument and an ionization method, and belongs to the technical field of electrospray mass spectrometry ionization devices. The nanoliter spray ionization mass spectrometry interface device comprises an ion guide tube, a first electrode and a second electrode; the inner wall of the ion guide tube is plated with a conductive film; the ion guide tube has an ion transmission channel in the form of a funnel along the length direction of the tube; the ion transmission channel has a first end and a second end; the diameter of the ion transmission channel gradually decreases from the first end to the second end; the first electrode is connected to the end of the first end; and the second electrode is connected to the end of the second end. The device has a simple structure and is convenient to operate; high stability, high sample utilization and high ion transmission efficiency of the electrospray process under a nanoliter flow rate can be realized; positive and negative switching can be directly and rapidly performed under the condition of normal pressure and opening; and problems, such as unstable spraying caused by bad high pressure and complex parameter optimization process, are avoided.

The electrostatic spraying device is applied to the technical field of plant protection and comprises a supporting frame plate, the two sides of the top of the supporting frame plate are in bolting connection with a pesticide mixing tank and a fixed base correspondingly, the top of the fixed base is in bolting connection with a pesticide adding tank, and two pesticide conveying pipelines are symmetrically installed on the side, away from the pesticide adding tank, of the pesticide mixing tank; the ends, away from each other, of the two pesticide conveying pipelines fixedly communicate with atomization nozzles, and a pesticide mixing mechanism and a pesticide spraying mechanism which are used in cooperation with the atomization nozzles are installed in the pesticide mixing tank and the pesticide adding tank correspondingly. The driving motor drives the first pesticide mixing rod to axially rotate around the circle center of the rotating cylinder rod to stir pesticide liquid, and meanwhile, the first pesticide mixing rod synchronously drives the second pesticide mixing rod to radially rotate around the first pesticide mixing rod to secondarily stir the pesticide liquid in the axial rotation process of the first pesticide mixing rod. Pesticide precipitation can be effectively avoided when liquid medicine is sprayed for a long time, meanwhile, the mixing efficiency of the pesticide and clear water is improved, and pesticide preparation and mixing in the early stage are facilitated.

This invention discloses an electrospray extraction / photoionization composite ion source for atmospheric pressure interface mass spectrometry, belonging to the field of mass spectrometry detection. It includes a sample transport and ionization mechanism, an extraction electrospray mechanism, and a vacuum ultraviolet light source mechanism. The extraction electrospray mechanism is fixedly connected to the sample transport and ionization mechanism, and the sample transport and ionization mechanism is fixedly connected to the vacuum ultraviolet light source mechanism. This invention utilizes the aforementioned electrospray extraction / photoionization composite ion source for atmospheric pressure interface mass spectrometry, enabling efficient ionization of gaseous and particulate organic components of different polarities, volatility, and molecular weights in the air. Through a reasonable structural design, it can operate under atmospheric pressure conditions, achieving the purpose of coupling with atmospheric pressure interface mass spectrometry.

The invention discloses an electrofluid spray film-making device, which belongs to the technical field of electrospray film-forming, and comprises a shell, a plurality of spray head assemblies, a liquid supply assembly, a gas supply assembly and a power supply module, a sealed cavity is formed in the shell, the multiple spray head assemblies are all installed on the shell, and each spray head assembly comprises a capillary tube and a protective sleeve which are coaxially arranged; a first channel and a second channel are formed in the protective sleeve, the capillary tube is coaxially sleeved with the first channel, the top end of the first channel is closed, the bottom end of the first channel extends out of the sealing cavity, and the second channel communicates with the sealing cavity and the first channel; the top end of each sealed chamber capillary tube penetrates out of the closed end of the first channel, and the bottom end of each sealed chamber capillary tube extends out of the bottom end of the first channel and faces the receiving substrate; the liquid supply assembly is used for inputting liquid into the capillary tubes of all the sealing cavities, the gas supply assembly is used for inputting gas into the sealing cavities, and the power supply module is used for providing high-voltage electricity for the capillary tubes of the sealing cavities.