An extendable multi-channel aerosol atomization device

Abstract

An extensible multi-channel aerosol atomization device, comprising an atomization chamber, a plurality of piezoelectric ceramic atomization pieces are arranged at the bottom of the atomization chamber, the piezoelectric ceramic atomization pieces are connected with a direct current power supply through piezoelectric ceramic atomization piece lines, a water medium is contained in the atomization chamber, and the atomization chamber is connected with a cooling circulation device through a cooling water pipeline; the atomization chamber comprises an end cover for fixing a plurality of tubular containers containing different kinds of materials to be atomized; the tubular containers are connected with an outlet of a carrier gas control valve through a carrier gas pipeline, an inlet of the carrier gas control valve is connected with a carrier gas source through a carrier gas inlet pipeline; the tubular containers are connected with an inlet of an atomization gas control valve through an atomization gas pipeline, and an outlet of the atomization gas control valve is connected with a conveying-printing device; by controlling the carrier gas control valve and the atomization gas control valve, on-demand atomization of the multiple materials in the atomization chamber is realized, the period of multi-material connection during multi-material aerosol jet printing is shortened, mutual contamination between the materials is avoided, and efficient integrated printing is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerosol jet printing atomization devices, in particular to an expandable multi-channel aerosol atomization device. BACKGROUND

[0002] Aerosol jet printing is a new non-contact advanced manufacturing technology, which realizes an economic and efficient high-precision printing process by controlling and limiting the transmission and deposition of microdroplets. The basic principle is that the solution or suspension is atomized into aerosol droplets in the atomization device, the carrier gas transports the aerosol droplets to the printing head, the aerosol droplets are constrained by the annular sheath gas (sheath gas) at the printing head, forming a micron-level width jet, and finally the aerosol droplets are deposited on the substrate surface in a limited manner, forming a micron-level feature size. The aerosol jet printing head is not easy to block and contaminate, has good substrate material compatibility, high alignment accuracy, high printing resolution, and small single-layer thickness, and has great potential in the fields of flexible sensors, wearable electronic devices, and curved conformal antenna manufacturing.

[0003] The patent application with the title "An automatic atomization device suitable for aerosol inkjet printing" (publication number CN118617859A) can obtain good atomization effect by controlling the carrier gas pressure regulating valve and the test tube automatic adjusting device, but it needs to adjust the resonance position of the ink and the ultrasonic system during printing to realize the atomization of the ink, which affects the printing quality and stability, and its structure is relatively complex and cannot realize multi-material printing. The patent application with the title "Aerosol jet printing device and additive manufacturing system" (publication number CN220052900U) stabilizes the air pressure intensity in the atomization chamber within a set threshold range through a sensor and an exhaust valve to ensure the printing quality of the aerosol jet printing device, but the atomization gas delivery pipeline is too long, and the atomization gas is easy to form droplets on the pipe wall, which has the risk of contaminating the printing head. The patent application with the title "Adjustable aerosol generating device, jet printing device and method" (publication number CN117484862A) adjusts the angle of the atomization gas chamber by rotating the rotating rod, so that the size range of the delivered aerosol droplets is more concentrated and the droplet distribution in the unit space is more uniform, but it uses multiple parallel pipe containers to deliver the atomized material to the atomization gas chamber for atomization, which has the risk of material cross-contamination.

[0004] In summary, most existing aerosol atomization devices are mainly single-material, and when multiple materials are switched, material replacement and device cleaning are required, resulting in a long transition period. In addition, contamination between multiple materials is easy. At present, there is still a lack of an atomization device that can effectively realize stable atomization and rapid switching of multiple materials. SUMMARY

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide an extensible multi-channel aerosol atomization device, which realizes stable atomization and rapid switching of multiple materials without contamination between multiple materials.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] An extensible multi-channel aerosol atomization device, comprising an atomization chamber 1, a plurality of piezoelectric ceramic atomization sheets 2 are arranged at the bottom of the atomization chamber 1, the piezoelectric ceramic atomization sheets 2 are connected with a direct current power supply through piezoelectric ceramic atomization sheet lines 2-1, a water medium is contained in the atomization chamber 1, and the atomization chamber 1 is connected with a cooling circulation device through a cooling water pipeline 4; the atomization chamber 1 comprises an end cover 1-1, which is used for fixing a plurality of tubular containers 3 containing different kinds of materials to be atomized; the tubular containers 3 are connected with an outlet of a carrier gas control valve 6 through a carrier gas pipeline 5, and an inlet of the carrier gas control valve 6 is connected with a carrier gas source through a carrier gas inlet pipeline 7; the tubular containers 3 are connected with an inlet of an atomization gas control valve 9 through an atomization gas pipeline 8, and an outlet of the atomization gas control valve 9 is connected with a conveying-printing device.

[0008] The tubular container 3 comprises a tubular container body 3-2 and a tubular container bottom cover 3-1 and a tubular container top cover 3-3 connected therewith; the tubular container bottom cover 3-1 is internally provided with a PI film 3-1-1, and the PI film 3-1-1 realizes high-flux atomization; the tubular container top cover 3-3 is provided with a carrier gas inlet 3-3-1, an atomization gas outlet 3-3-2 and an atomization gas guide sheet 3-3-3, the carrier gas inlet 3-3-1 is connected with the carrier gas pipeline 5, the atomization gas outlet 3-3-2 is connected with the atomization gas pipeline 8, and the atomization gas guide sheet 3-3-3 has a vertical cross section, which is used for guiding the atomization gas to pass through the atomization gas outlet 3-3-2 and preventing the atomization gas from forming a liquid film to block the aerosol passage.

[0009] The end cover 1-1 is connected with the plurality of tubular containers 3 through through holes 1-1-1; the end cover 1-1 is provided with a fixing port 1-1-2, the fixing port 1-1-2 is used for fixing the tubular containers 3 and adjusting the distance between the tubular container bottom cover 3-1 and the piezoelectric ceramic atomization sheet 2, so as to realize better atomization effect.

[0010] The atomization chamber 1 has extensibility, and the number of the piezoelectric ceramic atomization sheets 2 at the bottom of the atomization chamber 1 and the number of the through holes 1-1-1 of the end cover 1-1 of the atomization chamber 1 can be increased according to needs, so as to further increase the types of atomization materials.

[0011] The carrier gas control valve 6 inlet is a carrier gas inlet end 6-1, which is connected with the carrier gas inlet pipeline 7; the carrier gas control valve 6 outlet is a plurality of carrier gas outlet ends, which are respectively connected with the pipe type container 3 filled with different atomized materials through the carrier gas pipeline 5; the carrier gas control valve 6 is switched among the plurality of carrier gas outlet ends through the circuit signal control, so as to realize the switching of the carrier gas input of different atomized materials.

[0012] The atomized gas control valve 9 inlet is provided with a plurality of atomized gas inlet ends, which are respectively connected with the pipe type container 3 filled with different atomized materials through the atomized gas pipeline 8; the atomized gas control valve 9 outlet is a conveying gas outlet end 9-3, which is connected with the conveying pipeline 11; the atomized gas control valve 9 is switched among the plurality of atomized gas inlet ends through the circuit signal control, so as to realize the switching of the atomized gas output of different materials and prevent the mutual pollution between different atomized materials.

[0013] The expandable multi-channel aerosol atomization device realizes the on-demand atomization of a plurality of materials in the atomization chamber 1 through the control of the carrier gas control valve 6 and the atomized gas control valve 9, shortens the period of multi-material connection during the multi-material aerosol jet printing, and avoids the mutual pollution between a plurality of materials.

[0014] The conveying-printing device includes a Y-shaped three-way pipe 10, the Y-shaped three-way pipe 10 inlet is connected with the atomized gas control valve 9 outlet through the conveying pipeline 11, the Y-shaped three-way pipe 10 outlet is connected with the printing nozzle on-off valve 12 inlet through the conveying pipeline 11, the printing nozzle on-off valve 12 outlet is connected with the printing nozzle 13, and the printing nozzle 13 is connected with the sheath gas source through the sheath gas pipeline 14.

[0015] The Y-shaped three-way pipe 10 bottom is connected with a liquid storage bottle 10-1, the liquid droplets gathered and formed due to the adhesion to the conveying pipeline 11 wall during the aerosol conveying process enter the liquid storage bottle 10-1 at the Y-shaped three-way pipe 10 bottom due to the gravity, and the aerosol flow passes through the upper part of the Y-shaped three-way pipe 10, so as to realize the separation of the liquid droplets and the aerosol flow.

[0016] The printing nozzle on-off valve 12 inlet is a conveying gas inlet end 12-1, which is connected with the conveying pipeline 11; the printing nozzle on-off valve 12 outlet is a printing gas outlet end 12-2, which is connected with the printing nozzle 13; the printing nozzle on-off valve 12 is provided with an air outlet end 12-3, which is installed with filter cotton, used for filtering the aerosol particles discharged into the air, reducing the pollution to the environment; the printing nozzle on-off valve 12 is switched between the conveying gas inlet end 12-1 and the printing gas outlet end 12-2 through the circuit signal control, so as to realize the on-off of the printing nozzle 13.

[0017] The piezoelectric ceramic atomization piece 2 is based on ultrasonic atomization principle, rated voltage 5V-60V, rated current 0.2A-5A, and working frequency 0.1MHz-8MHz.

[0018] The carrier gas pressure is used in the range of 1sccm-500sccm, and the sheath gas pressure is used in the range of 10sccm-2000sccm.

[0019] The tubular container 3 is loaded with metal ink of gold, silver, copper, nickel and platinum, non-metallic conductor ink of carbon nanotube and PEDOT:PSS, and non-metallic polymer ink of PI.

[0020] The PI film 3-1-1 has a thickness of 5-100 microns.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] 1. The present application uses an expandable atomization chamber, which can increase the types of atomized materials as needed, and helps to realize multi-material aerosol jet printing; by reasonably controlling the carrier gas control valve and the atomization gas control valve, the atomization of multiple materials in the atomization chamber can be realized as needed, which helps to shorten the period of multi-material connection during multi-material aerosol jet printing, avoid mutual contamination between multiple materials, and realize efficient integrated printing.

[0023] 2. The tubular container bottom cover of the present application is provided with a PI film, and the PI film has good acoustic impedance matching with the water medium in the atomization chamber, which helps to transfer the energy of the acoustic field and achieve better atomization effect and high-throughput atomization; the atomization gas guiding piece of the tubular container top cover has a vertical cross section, which is used to guide the atomization gas to the atomization gas outlet and prevent the atomization gas from forming a liquid film to block the aerosol passage, so that high-efficiency delivery can be realized.

[0024] 3. The delivery-printing device of the present application uses the liquid droplets accumulated on the wall of the pipe during the aerosol delivery process to realize the separation of the liquid droplets and the aerosol flow, avoid the pollution of the printing nozzle, and ensure the feasibility of long-distance delivery; the printing nozzle on-off valve can realize the start and stop of the printing process, which helps to carry out multi-material aerosol jet printing. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic view of the atomization device of the embodiment of the present application.

[0026] Figure 2 It is a structure schematic view of the atomization part of the embodiment of the present application.

[0027] Figure 3 It is a schematic view of the atomization chamber of the embodiment of the present application.

[0028] Figure 4 Schematic diagram of the atomizing chamber end cover and the tube container of the embodiment of the present application.

[0029] Figure 5 Schematic diagram of the carrier gas control valve of the embodiment of the present application.

[0030] Figure 6 Schematic diagram of the atomizing gas control valve of the embodiment of the present application.

[0031] Figure 7 Schematic diagram of the tube container bottom cover of the embodiment of the present application.

[0032] Figure 8 Schematic diagram of the tube container top cover of the embodiment of the present application.

[0033] Figure 9 Schematic diagram of the structure of the delivery-printing device of the embodiment of the present application.

[0034] Figure 10 Schematic diagram of the Y-shaped three-way joint and the filtering aerosol process of the liquid storage bottle of the embodiment of the present application.

[0035] Figure 11 Comparison diagram of the atomization of two materials of the embodiment of the present application.

[0036] Figure 12 Schematic diagram of the pipeline before filtering and the pipeline after filtering of the embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the embodiments of the present application and the accompanying drawings.

[0038] Reference Figure 1 , Figure 2 , Figure 3An extendable multi-channel aerosol atomization device, comprising an atomization chamber 1, a plurality of piezoelectric ceramic atomization sheets 2 are arranged at the bottom of the atomization chamber 1 for partitioned atomization of printing materials; the piezoelectric ceramic atomization sheets 2 are connected with a direct current power supply through piezoelectric ceramic atomization sheet lines 2-1, and the direct current power supply is used to control the atomization power and thus the atomization amount; a water medium for sound field transmission is contained in the atomization chamber 1, and the atomization chamber 1 is connected with a cooling circulation device through a cooling water pipeline 4, and the cooling circulation device is used to provide heat dissipation; the atomization chamber 1 comprises an end cover 1-1 for fixing a plurality of tubular containers 3 containing different kinds of materials to be atomized; the tubular containers 3 are connected with the outlet of a carrier gas control valve 6 through a carrier gas pipeline 5, and the inlet of the carrier gas control valve 6 is connected with a carrier gas source through a carrier gas inlet pipeline 7, and the carrier gas pressure is used in a range of 1sccm-500sccm; the tubular containers 3 are connected with the inlet of an atomization gas control valve 9 through an atomization gas pipeline 8, and the outlet of the atomization gas control valve 9 is connected with a delivery-printing device; the delivery-printing device comprises a Y-shaped three-way pipe 10, the inlet of the Y-shaped three-way pipe 10 is connected with the outlet of the atomization gas control valve 9 through a delivery pipeline 11, the outlet of the Y-shaped three-way pipe 10 is connected with the inlet of a printing nozzle on-off valve 12 through a delivery pipeline 11, the outlet of the printing nozzle on-off valve 12 is connected with a printing nozzle 13, and the printing nozzle 13 is connected with a sheath gas source through a sheath gas pipeline 14, and the sheath gas pressure is used in a range of 10sccm-2000sccm.

[0039] The piezoelectric ceramic atomization sheet 2 is based on the principle of ultrasonic atomization, and has a rated voltage of 5V-60V, a rated current of 0.2A-5A, and a working frequency of 0.1MHz-8MHz.

[0040] With reference to Figure 4 , the end cover 1-1 is connected with the plurality of tubular containers 3 through through holes 1-1-1; the tubular containers 3 are loaded with metal inks such as gold, silver, copper, nickel and platinum, non-metallic conductor inks such as carbon nanotubes and PEDOT:PSS, and non-metallic polymer inks such as PI.

[0041] A fixing port 1-1-2 is arranged on the end cover 1-1, the tubular containers 3 are fixed by the fixing port 1-1-2 through a set screw, and the distance between the bottom cover 3-1 of the tubular container and the piezoelectric ceramic atomization sheet 2 is adjusted, so that a better atomization effect is achieved.

[0042] With reference to Figure 2 , Figure 4 , the atomization chamber 1 has extendability, the number of piezoelectric ceramic atomization sheets 2 at the bottom of the atomization chamber 1 and the number of through holes 1-1-1 of the end cover 1-1 of the atomization chamber 1 are increased as needed, and thus the types of atomization materials are increased, which is helpful for the realization of multi-material aerosol jet printing.

[0043] With reference to Figure 5, the carrier gas control valve 6 inlet is a carrier gas inlet end 6-1, the carrier gas inlet end 6-1 is connected with the carrier gas inlet pipeline 7; the carrier gas control valve 6 outlet is a first carrier gas outlet end 6-2 and a second carrier gas outlet end 6-3, the first carrier gas outlet end 6-2 and the second carrier gas outlet end 6-3 are respectively connected with the pipe type container 3 filled with different atomization materials through the carrier gas pipeline 5; the carrier gas control valve 6 is switched between the first carrier gas outlet end 6-2 and the second carrier gas outlet end 6-3 through the circuit signal control, so as to realize the switching of the carrier gas input of different atomization materials.

[0044] With reference to Figure 6 , the atomization gas control valve 9 inlet is provided with a first atomization gas inlet end 9-1 and a second atomization gas inlet end 9-2, the first atomization gas inlet end 9-1 and the second atomization gas inlet end 9-2 are respectively connected with the pipe type container 3 filled with different atomization materials through the atomization gas pipeline 8; the atomization gas control valve 9 outlet is a delivery gas outlet end 9-3, the delivery gas outlet end 9-3 is connected with the delivery pipeline 11; the atomization gas control valve 9 is switched between the first atomization gas inlet end 9-1 and the second atomization gas inlet end 9-2 through the circuit signal control, so as to realize the switching of the atomization gas output of different materials and prevent the mutual pollution between different atomization materials.

[0045] With reference to Figure 2 , Figure 5 , Figure 6 , the extensible multi-channel aerosol atomization device can realize the on-demand atomization of multiple materials in the atomization chamber 1 through the control of the carrier gas control valve 6 and the atomization gas control valve 9, which helps to shorten the period of multi-material connection during multi-material aerosol jet printing, avoid the mutual pollution between multiple materials, and realize efficient integrated printing.

[0046] With reference to Figure 4 , Figure 7 , Figure 8 , the pipe type container 3 includes a pipe type container tube body 3-2 and a pipe type container bottom cover 3-1 and a pipe type container top cover 3-3 connected therewith; the pipe type container bottom cover 3-1 is internally provided with a PI film 3-1-1, the thickness of the PI film 3-1-1 is 5-100 μm, the PI film 3-1-1 has good acoustic impedance matching with the water medium, which helps to transfer the energy of the sound field and achieve better atomization effect and realize high-throughput atomization; the pipe type container top cover 3-3 is provided with a carrier gas inlet 3-3-1, an atomization gas outlet 3-3-2 and an atomization gas guide piece 3-3-3, the carrier gas inlet 3-3-1 is connected with the carrier gas pipeline 5, the atomization gas outlet 3-3-2 is connected with the atomization gas pipeline 8, and the atomization gas guide piece 3-3-3 has a vertical section, which is used to guide the atomization gas to the atomization gas outlet 3-3-2 and prevent the atomization gas from forming a liquid film to block the aerosol passage, so as to realize high-efficiency delivery.

[0047] With reference toFigure 9 、 Figure 10 The Y-shaped tee 10 is connected with a liquid storage bottle 10-1 at the bottom, and the liquid droplets adhering to the wall of the conveying pipeline 11 during the aerosol conveying process enter the liquid storage bottle 10-1 at the bottom of the Y-shaped tee 10 due to gravity, and the aerosol flow passes through the upper part of the Y-shaped tee 10, so that the liquid droplets and the aerosol flow are separated, the printing head 13 is prevented from being polluted, and the long-distance conveying feasibility is ensured.

[0048] The printing head on-off valve 12 has a conveying gas inlet end 12-1 connected with the conveying pipeline 11, a printing gas outlet end 12-2 connected with the printing head 13, and an air outlet end 12-3 provided with filter cotton for filtering the aerosol particles discharged into the air to reduce the pollution to the environment. The printing head on-off valve 12 is switched between the conveying gas inlet end 12-1 and the printing gas outlet end 12-2 through the circuit signal control, so as to realize the on-off of the printing head 13 and facilitate the multi-material aerosol jet printing.

[0049] Referring to Figure 11 , Figure 11 It is a result physical map of the on-demand atomization of multiple materials in this embodiment, and the on-demand atomization between multiple materials is realized through the multiple piezoelectric ceramic atomization sheets 2 in the atomization chamber and the power supply of the direct current power supply. It can be seen that the atomization effect of the material is good.

[0050] Referring to Figure 12 , Figure 12 It is a result physical map of the long-distance conveying in this embodiment, and the separation of the liquid droplets and the aerosol flow is realized through the Y-shaped tee 10 and the liquid storage bottle 10-1 at the bottom thereof. It can be seen that there are no liquid droplets on the inner wall of the pipeline filtered through the Y-shaped tee, and the printing head 13 is prevented from being polluted.

[0051] Although the present application has been described with reference to the embodiments, various modifications can be made to it and equivalent replacements can be made to the components thereof without departing from the concept of the present application, and the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A scalable multi-channel aerosol atomizing device, comprising an atomizing chamber (1), characterized in that: The bottom of the atomizing chamber (1) is equipped with multiple piezoelectric ceramic atomizing plates (2). The piezoelectric ceramic atomizing plates (2) are connected to a DC power supply through the piezoelectric ceramic atomizing plate circuit (2-1). The atomizing chamber (1) contains water medium. The atomizing chamber (1) is connected to a cooling circulation device through a cooling water pipe (4). The atomizing chamber (1) includes an end cap (1-1) for fixing multiple tubular containers (3) that hold different types of materials to be atomized. The tubular containers (3) are connected to the outlet of the carrier gas control valve (6) through a carrier gas pipe (5). The inlet of the carrier gas control valve (6) is connected to the carrier gas source through a carrier gas inlet pipe (7). The tubular containers (3) are connected to the inlet of the atomizing gas control valve (9) through an atomizing gas pipe (8). The outlet of the atomizing gas control valve (9) is connected to a conveying-printing device.

2. The apparatus according to claim 1, characterized in that: The tubular container (3) includes a tubular container body (3-2) and a tubular container bottom cover (3-1) and a tubular container top cover (3-3) connected thereto. The tubular container bottom cover (3-1) contains a PI film (3-1-1), which enables high-throughput atomization. The tubular container top cover (3-3) is provided with a carrier gas inlet (3-3-1), an atomized gas outlet (3-3-2), and an atomized gas guide plate (3-3-3). The carrier gas inlet (3-3-1) is connected to the carrier gas pipe (5), and the atomized gas outlet (3-3-2) is connected to the atomized gas pipe (8). The atomized gas guide plate (3-3-3) has a vertical cross section, which is used to guide the atomized gas to the atomized gas outlet (3-3-2) and prevent the atomized gas from forming a liquid film that blocks the aerosol passage.

3. The apparatus according to claim 2, characterized in that: The end cap (1-1) is connected to multiple tubular containers (3) through a through hole (1-1-1); the end cap (1-1) is provided with a fixing port (1-1-2), which uses a set screw to fix the tubular container (3) and adjust the distance between the bottom cover (3-1) of the tubular container and the piezoelectric ceramic atomizing plate (2) to achieve a better atomization effect.

4. The apparatus according to claim 3, characterized in that: The atomizing chamber (1) is expandable. The number of piezoelectric ceramic atomizing plates (2) at the bottom of the atomizing chamber (1) and the number of through holes (1-1-1) of the end cap (1-1) of the atomizing chamber (1) can be increased as needed, thereby increasing the types of atomizing materials.

5. The apparatus according to claim 1, characterized in that: The inlet of the carrier gas control valve (6) is the carrier gas inlet end (6-1), which is connected to the carrier gas inlet pipe (7); the outlet of the carrier gas control valve (6) is multiple carrier gas outlet ends, which are respectively connected to the tubular container (3) containing different atomizing materials through the carrier gas pipe (5); the carrier gas control valve (6) switches between multiple carrier gas outlet ends by circuit signal control to realize the switching of carrier gas input for different atomizing materials.

6. The apparatus according to claim 1, characterized in that: The atomizing gas control valve (9) has multiple atomizing gas inlet ends, which are connected to tubular containers (3) containing different atomizing materials via atomizing gas pipes (8). The outlet of the atomizing gas control valve (9) is the delivery gas outlet end (9-3), which is connected to the delivery pipe (11). The atomizing gas control valve (9) switches between multiple atomizing gas inlet ends via circuit signals to switch the output of atomizing gas from different materials, while preventing mutual contamination between different atomizing materials.

7. The apparatus according to claim 1, characterized in that: The expandable multi-channel aerosol atomizing device achieves on-demand atomization of multiple materials in the atomization chamber (1) by controlling the carrier gas control valve (6) and the atomizing gas control valve (9), shortening the cycle of multi-material connection during multi-material aerosol jet printing and avoiding mutual contamination between multiple materials.

8. The apparatus according to claim 1, characterized in that: The conveying-printing device includes a Y-type tee (10), the inlet of which is connected to the outlet of the atomizing gas control valve (9) through a conveying pipe (11), the outlet of which is connected to the inlet of the print head on / off valve (12) through a conveying pipe (11), the outlet of which is connected to the print head (13), and the print head (13) is connected to the sheath gas source through a sheath gas pipe (14).

9. The apparatus according to claim 8, characterized in that: The bottom of the Y-type tee (10) is connected to the storage bottle (10-1). During the aerosol transportation process, the droplets that are attached to the wall of the transportation pipe (11) and accumulate are drawn into the storage bottle (10-1) at the bottom of the Y-type tee (10) due to gravity. The aerosol flow flows in the upper part of the Y-type tee (10), thereby realizing the separation of the droplets and the aerosol flow.

10. The apparatus according to claim 8, characterized in that: The inlet of the printhead on / off valve (12) is the gas inlet (12-1), which is connected to the delivery pipe (11); the outlet of the printhead on / off valve (12) is the printing gas outlet (12-2), which is connected to the printhead (13); the printhead on / off valve (12) is provided with an air outlet (12-3), which is equipped with filter cotton to filter aerosol particles discharged into the air and reduce environmental pollution; the printhead on / off valve (12) is controlled by a circuit signal to switch between the gas inlet (12-1) and the printing gas outlet (12-2) to realize the on / off of the printhead (13).

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