A silver nanowire spraying equipment and spraying method

Abstract

This invention belongs to the field of silver nanowire spraying technology, and proposes a silver nanowire spraying device and method. A nozzle is installed at the top of the housing via a three-axis moving shaft, employing a multi-degree-of-freedom moving spraying method. Furthermore, a separate housing and air compressor are installed at the bottom of the housing. A raw material storage tank is installed on the housing, and a stirrer is installed on the raw material storage tank. The stirrer agitates the silver nanowire suspension in the raw material storage tank, resulting in a more uniform and stable output silver nanowire suspension. The separate installation of the housing and air compressor avoids the impact of air compressor and stirrer vibrations on the three-axis moving shaft and the heating substrate. Simultaneously, the heating substrate and the nearby heating fan ensure uniform heating of the substrate surface, improving the uniformity and stability of the silver nanowire suspension spraying on the substrate surface.

Description

Technical Field

[0001] This invention belongs to the field of silver nanowire spraying technology, and particularly relates to a silver nanowire spraying equipment and spraying method. Background Technology

[0002] Silver nanowires possess high ductility, high transmittance, and excellent electrical properties, making them widely used in flexible electronic products such as touchscreens, flexible displays, and solar cells. Silver nanowire spraying technology is an advanced process widely applied in the manufacturing of flexible electronic devices. By uniformly spraying a silver nanowire suspension onto a substrate surface, it enables the rapid, efficient, and low-cost preparation of conductive silver nanowire films.

[0003] In the preparation of silver nanowire conductive films, the quality of the conductive film product is determined by whether the silver nanowire suspension can be uniformly sprayed onto the substrate surface. However, in the current equipment used for silver nanowire spraying, the paint tank and power source are all set on an integrated frame. During the spraying process, the vibration of the paint tank and power source will cause the nozzle and substrate to vibrate slightly, which will affect the uniformity of the silver nanowire suspension spraying on the substrate surface. In addition, the temperature difference and uncontrollable temperature in different areas of the substrate surface during the spraying process will also affect the overall uniformity and stability of the silver nanowire suspension on the substrate surface, thus affecting the quality of the conductive film after spraying. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a silver nanowire spraying device and method. By separating the housing and air compressor from the shell, incorporating a stirrer, a three-axis moving shaft, and combining a heating substrate and a heating fan, the uniformity of the silver nanowire suspension during discharging and spraying is ensured. This also avoids the problems of vibration and uneven heating of the substrate surface affecting uniformity and stability during spraying, thus greatly guaranteeing the quality of the conductive film after spraying.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a silver nanowire spraying device, which adopts the following technical solution:

[0006] A silver nanowire spraying device includes a housing, a nozzle is disposed above the housing via a three-axis moving shaft, and a heating plate for placing a substrate is disposed above the housing, with a heating fan disposed near the heating plate.

[0007] The housing contains a box and an air compressor at its lower part, and the box and the air compressor are separately disposed from the housing; a raw material storage tank is disposed on the box, and a stirrer is disposed on the raw material storage tank; the raw material storage tank is connected to the nozzle through the air compressor.

[0008] Furthermore, the air compressor is connected to a filter triplet, which is connected to the raw material storage tank via a proportional valve.

[0009] Furthermore, the housing is provided with an exhaust port; an exhaust fan is installed at the exhaust port; and a lighting tube is provided inside the housing.

[0010] Furthermore, the heating fan includes a motor driver and a component disposed on the motor driver.

[0011] Furthermore, the nozzle of the spray head is configured as a fan-shaped nozzle.

[0012] Furthermore, heating fans are provided on both sides of the heating substrate, and pipe groups communicating with the heating fans are installed on the left and right sides of the heating substrate. Multiple air outlets are opened on the pipes. Two pipe groups are arranged vertically on both sides of the heating substrate. Each pipe group includes multiple parallel pipes, and the diameter of the multiple air outlets on each pipe gradually increases along the direction of hot air.

[0013] Multiple temperature sensors are vertically arranged inside the housing. The temperature difference detected by each two adjacent temperature sensors is calculated, and then the average temperature difference of all temperature differences is calculated. When the average temperature difference is greater than a preset value, the air volume of the heating fan per unit time is increased until the average temperature difference is less than or equal to the preset value, and then the air volume of the heating fan per unit time is restored.

[0014] Furthermore, the three-axis moving axis includes an X-axis moving axis, a Y-axis moving axis, and a Z-axis moving axis; the X-axis moving axis is connected to an X-axis motor driver, and limiters are provided at both ends of the X-axis moving axis; the Y-axis moving axis is connected to a Y-axis motor driver, and limiters are provided at both ends of the Y-axis moving axis; the Z-axis moving axis is connected to a Z-axis motor driver; the nozzle is disposed on the Z-axis moving axis.

[0015] The housing is equipped with a display screen, and a controller is installed inside the display screen. The controller is connected to the display screen, the X-axis motor driver, the Y-axis motor driver, and the Z-axis motor driver. A temperature sensor, a humidity sensor, and a pressure sensor are installed inside the housing. The temperature sensor, the humidity sensor, and the pressure sensor are connected to the controller.

[0016] Furthermore, each of the three-axis moving shafts has a buffer structure at its end. The buffer structure includes a base, a buffer shaft slidably disposed in a preset sliding hole on the base, and a spring sleeved on the buffer shaft. When the shaft of the three-axis moving shaft moves to the inflection point, the spring is compressed or stretched, thereby preventing vibration or instantaneous change in spraying speed when the nozzle direction changes.

[0017] Furthermore, the controller is used to control the position of the nozzle in real time through the X-axis motor driver, the Y-axis motor driver and the Z-axis motor driver, and to detect the temperature, humidity and air pressure inside the housing in real time through the temperature sensor, the humidity sensor and the air pressure sensor.

[0018] To achieve the above objectives, in a second aspect, the present invention also provides a silver nanowire spraying method, employing the following technical solution:

[0019] A method for spraying silver nanowires, using the silver nanowire spraying equipment as described in the first aspect, includes: stirring a silver nanowire suspension in a raw material storage tank using the stirrer; and delivering the silver nanowire suspension in the raw material storage tank to the nozzle using an air compressor.

[0020] The heating substrate and the heating fan are used to uniformly heat the substrate surface on the heating substrate; the three-axis moving shaft drives the nozzle to move, and the nozzle sprays silver nanowire suspension onto the substrate surface on the heating substrate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. In this invention, a nozzle is installed at the top of the housing via a three-axis moving shaft. The multi-degree-of-freedom moving spraying method of the three-axis moving shaft allows the silver nanowire suspension to be uniformly sprayed onto the entire surface of the substrate. Furthermore, a separate housing and air compressor are installed at the bottom of the housing. A raw material storage tank is installed on the housing, and a stirrer is installed on the raw material storage tank. The stirrer agitates the silver nanowire suspension in the raw material storage tank, making the output silver nanowire suspension more uniform and stable, improving the uniformity and stability of the silver nanowire suspension spraying on the substrate surface. The separate installation of the housing and air compressor avoids the impact of vibration from the air compressor and stirrer on the three-axis moving shaft and the heating substrate, further ensuring the uniformity and stability of the silver nanowire suspension. Simultaneously, the heating substrate and the heating fan near it ensure the stability of the silver nanowire suspension spraying on the substrate surface, while the heating fan ensures uniform heating of the substrate surface, further improving the uniformity and stability of the silver nanowire suspension spraying on the substrate surface. In summary, this invention, through the separate arrangement of the housing and air compressor from the shell, the inclusion of a stirrer, a three-axis moving shaft, and the combination of a heating substrate and a heating fan, ensures the uniformity of the silver nanowire suspension during the dispensing and spraying process. It also avoids the problems of uneven uniformity and stability caused by vibration and uneven heating of the substrate surface during the spraying process, thus greatly ensuring the quality of the conductive film after spraying.

[0023] 2. In this invention, two pipe groups are vertically arranged on both sides of the heating substrate. Each pipe group includes multiple parallel pipes, which allows the hot air blown by the two heating fans to be evenly directed towards the upper space of the heating substrate, resulting in high temperature uniformity in the upper environment of the heating substrate. Furthermore, the diameter of the multiple air outlets on each pipe gradually increases along the direction of the hot air. By increasing the air volume away from the heating fans, the problem of the environment temperature rising faster near the heating fans and slower away from the heating fans is avoided, further improving the temperature uniformity within the environment and ensuring the quality of the conductive film after spraying.

[0024] 3. This invention considers the influence of the pipe assembly and air outlet on the temperature inside the housing. Multiple temperature sensors are vertically installed inside the housing. The temperature difference detected by each pair of adjacent temperature sensors is calculated, and then the average temperature difference is calculated. When the average temperature difference is greater than a preset value, it indicates that the temperature inside the housing is uneven. At this point, the airflow rate of the heating fan per unit time is appropriately increased. By increasing the circulating air inside the housing, the uniformity of the overall ambient temperature is improved until the average temperature difference is less than or equal to the preset value. Then, the airflow rate of the heating fan per unit time is restored, so that the temperature inside the housing reaches the goal of overall environmental uniformity in a short time, thereby improving the quality of the conductive film after spraying. Attached Figure Description

[0025] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0026] Figure 1 This is a schematic diagram of the device according to Embodiment 1 of the present invention;

[0027] Figure 2 This is a left-side view of the device according to Embodiment 1 of the present invention;

[0028] Figure 3 This is a structural diagram of the raw material storage tank of the equipment in Embodiment 1 of the present invention;

[0029] Figure 4 This is a structural diagram of the gas supply system of the device in Embodiment 1 of the present invention;

[0030] Figure 5 This is a structural diagram of the exhaust system of the device in Embodiment 1 of the present invention;

[0031] Figure 6 This is a structural diagram of the heating fan of the device in Embodiment 1 of the present invention;

[0032] Figure 7 This is a structural diagram of the pipeline assembly according to Embodiment 1 of the present invention;

[0033] Figure 8 This is a structural diagram of the air outlet of Embodiment 1 of the present invention;

[0034] Figure 9 This is a structural diagram of the three-axis moving shaft of the device in Embodiment 1 of the present invention;

[0035] Figure 10 This is a schematic diagram of the buffer structure in Embodiment 1 of the present invention;

[0036] Figure 11 This is a structural diagram of the nozzle of the device according to Embodiment 1 of the present invention;

[0037] Figure 12 This is a schematic diagram of the display screen of the device according to Embodiment 1 of the present invention;

[0038] The components include: 1. Outer shell; 2. Upper hatch; 3. Lower hatch; 4. Wheels; 5. Housing; 6. Raw material storage tank; 7. Water tank; 8. Tank lid switch; 9. Agitator; 10. Air compressor; 11. Terminal block; 12. Exhaust port; 13. Exhaust fan; 14. Heating base plate; 1401. Piping assembly; 1402. Air outlet; 15. Heating fan; 16. Nozzle; 17. Three-axis moving axis; 18. Button; 19. Display screen; 20. Air storage tank; 21. Proportional valve; 22. Filter triplet; 23. 24. Pressure sensor; 25. Solenoid valve; 26. Axis motor driver; 27. Lighting tube; 28. Temperature sensor; 29. ​​Exhaust fan motor driver; 30. Humidity sensor; 31. Gas sensor; 32. Fan blade; 33. Heating fan motor driver; 34. X-axis moving axis; 35. Y-axis moving axis; 36. Z-axis moving axis; 37. X-axis motor driver; 38. Y-axis motor driver; 39. X-axis limiter; 40. Y-axis limiter; 41. Nozzle. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0041] Example 1:

[0042] like Figure 1As shown, this embodiment provides a silver nanowire spraying device, including a housing 1, a raw material storage system component, a gas supply system component, an exhaust system component, a temperature control system component, a spraying system component, and a control system component. The housing 1 is equipped with wheels 4 at its bottom for easy movement. The housing 1 consists of two parts, an upper door 2 and a lower door 3, for easy operation by staff. An exhaust port 12 is located at the top of the housing 1 for connecting an external exhaust pipe to expel gas from the cavity.

[0043] like Figure 1 and Figure 3 As shown, the raw material storage system components include a raw material storage tank 6, a water tank 7, a tank lid switch 8, and a stirrer 9. The raw material storage tank 6 is placed on a housing 5, which is a movable housing for easy replacement of raw materials. The raw material storage tank 6 can be opened via the tank lid switch 8 to pour in the raw materials, and then the lid can be closed. The stirrer 9 can be used to thoroughly mix the raw materials.

[0044] Specifically, the box body 5 is equipped with wheels at the bottom, and the box body 5 does not contact the lower part of the outer shell 1. The raw material storage tank 6 and the stirrer 9 are set separately from the heating plate 14 and the nozzle 16 above the outer shell 1. This avoids the impact of vibration of the raw material storage tank 6 itself and vibration of the stirrer 9 during operation on the heating plate 14 and the nozzle 16. It can avoid the problem of uneven spraying of silver nanowire suspension on the substrate surface and ensure the quality of the conductive film after spraying.

[0045] The lid of the raw material storage tank 6 can be set to a manual opening method or an automatic opening method. When set to a manual opening method, the lid switch 8 can be implemented by means of a clamp or buckle, which can fix the lid at the opening of the raw material storage tank 6 and open the lid on the raw material storage tank 6.

[0046] The water tank 7 can be connected to the raw material storage tank 6 via pipes and pumps, etc., for adjusting the concentration of the suspension solution in the raw material storage tank 6, and for rinsing the raw material storage tank 6 after spraying.

[0047] The stirrer 9 can be a stirring rod mechanism driven by a motor. Optionally, the motor of the stirrer 9 is mounted on the cap or other structural component of the raw material storage tank 6, and the stirring rod is located inside the raw material storage tank 6. When the motor drives the stirring rod to rotate, it can fully stir the silver nanowire suspension in the raw material storage tank 6, making the output silver nanowire suspension more uniform and stable, and improving the uniformity and stability of the silver nanowire suspension spraying on the substrate surface. At the same time, the raw material storage tank 6 is placed on the box 5, and the box 5 is separately set from the shell 1, which avoids the impact of the vibration generated during the stirring process on the heating plate 14 and the nozzle 16, and can avoid the problem of uneven spraying of the silver nanowire suspension on the substrate surface, further improving the quality of the conductive film after spraying.

[0048] like Figure 1 and Figure 4 As shown, the air supply system components include an air compressor 10, an air storage tank 20, a proportional valve 21, a triplet 22, a pressure sensor 23, and a solenoid valve 24. The air storage tank 20 can be understood as a raw material storage tank 6.

[0049] Specifically, the air compressor 10 is connected to the filter triplet 22, and the filter triplet 22 is connected to the air tank 20 through the proportional valve 21. The output pressure can be adjusted by adjusting the proportional valve 21. The pressure sensor 23 is located at the proportional valve 21 and is used to detect the pressure and display it in real time on the display screen 19.

[0050] like Figure 1 and Figure 5 As shown, the exhaust system components include an exhaust port 12, an exhaust fan 13, a motor driver 28, and a lighting tube 26.

[0051] Specifically, the exhaust port 12 is located at the top of the outer casing 1 and is used to connect to an external pipe to transport gas; the exhaust fan 13 is installed at the exhaust port 12 and is driven by the motor driver 28 to accelerate the exhaust efficiency; the lighting tube 26 is installed inside the upper part of the outer casing 1 for lighting, so that the staff can clearly observe the internal situation of the equipment.

[0052] like Figure 1 and Figure 6 As shown, the temperature control system assembly includes a heating base plate 14 and a heating fan 15.

[0053] Specifically, the heating substrate 14 is located at the bottom of the upper half of the outer casing 1, and is heated by an aluminum hot plate. It supports adjusting the temperature of the hot plate to 100°C within two minutes, with a maximum temperature of 180°C and stable temperature adjustment. The heating substrate has a size of 600mm×600mm. The heating fan 15 includes a fan blade 31 and a motor driver 32, supports heating of the space inside the device, and has a stable temperature adjustment within the range of 15°C to 50°C. It is located at the corner of the upper half of the device.

[0054] In some embodiments, optionally, such as Figure 7 and Figure 8 As shown, an aluminum heating plate is installed at the bottom of the heating substrate 14 to uniformly heat the heating substrate 14. Heating fans 15 are provided on both sides of the heating substrate 14 to heat the entire space environment. Correspondingly, pipe assemblies 1401 are installed on the left and right sides of the heating substrate 14 to guide hot air to diffuse evenly throughout the space. Optionally, multiple air outlets 1402 are opened on the pipes 1401 to facilitate heat diffusion.

[0055] Optionally, two pipe groups 1401 are vertically arranged on both sides of the heating substrate 14. Each pipe group 1401 includes multiple parallel pipes, so that the hot air blown by the two heating fans 15 is evenly blown into the upper space of the heating substrate 14, resulting in a high temperature uniformity in the upper environment of the heating substrate 14. In addition, the diameter of the multiple air outlets 1402 on each pipe gradually increases along the direction of the hot air. By increasing the air volume away from the heating fan 15, the problem of the ambient temperature rising faster near the heating fan 15 and slower away from the heating fan 15 is avoided, which further improves the temperature uniformity in the environment and ensures the quality of the conductive film after spraying.

[0056] like Figure 9 and Figure 10 As shown, the spraying system components include a spray head 16 and a three-axis moving axis 17.

[0057] Specifically, the nozzle at the bottom of the nozzle 16 is a fan-shaped nozzle 41, which further improves the overall uniformity of the silver nanowire suspension sprayed on the substrate surface. The nozzle 16 is fixed below the Z-axis moving axis 35 and its Z-axis position can be adjusted arbitrarily. The three-axis moving axis 17 includes an X-axis moving axis 33, a Y-axis moving axis 34, and a Z-axis moving axis 35. The X-axis moving axis 33 realizes the controllable movement of the nozzle on the X-axis through an X-axis motor driver 36, and limiters 39 are provided at both ends of the X-axis moving axis. The Y-axis moving axis 34 realizes the controllable movement of the nozzle 41 on the Y-axis through a Y-axis motor driver 37, and limiters 40 are provided at both ends of the Y-axis moving axis 35. The Z-axis moving axis 35 realizes the controllable movement of the nozzle on the Z-axis through a Z-axis motor driver 38. Optionally, the X-axis moving axis 33, the Y-axis moving axis 34, and the Z-axis moving axis 35 can be implemented by linear motors or other devices. The limiters 39 and 40 can be limit plates or limit switches, etc.

[0058] Optional, such as Figure 11 As shown, the three-axis moving shaft 17 employs a servo motor and a servo driver to achieve precise control of the shaft, ensuring stable operation of the motor and maintaining uniform speed movement of the shaft and nozzle. Each axis of the three-axis moving shaft 17 has a buffer structure 1701 at its end to maintain the stability of the nozzle during operation. The buffer structure 1701 is a spring buffer, comprising a base 1702, a buffer shaft 1703 slidably disposed within a pre-set sliding hole 1703 on the base 1702, and a spring 1704 sleeved on the buffer shaft 1703. When the shaft of the three-axis moving shaft 17 reaches an inflection point, the spring 1704 is compressed or stretched, thereby preventing vibration or instantaneous changes in spraying speed when the nozzle direction changes, thus maintaining stable nozzle operation.

[0059] Optionally, the nozzle 16 includes a spray width adjustment knob, a liquid output adjustment knob, and an atomization adjustment knob, which are used to precisely control the spraying process. The liquid output adjustment knob controls the amount of liquid output. The atomization adjustment knob controls the intensity of liquid atomization. The spray width adjustment knob controls the size of the fan-shaped area of ​​the liquid spray.

[0060] like Figure 1 and Figure 12 As shown, the control system components include a display screen 19, control buttons 18, an X-axis motor driver 36, a Y-axis motor driver 37, a Z-axis motor driver 38, a pressure sensor 30, a temperature sensor 27, and a humidity sensor 29.

[0061] Specifically, the display screen 19 is located on the side of the housing 1 and can display and control various conditions in real time. The control button 18 is used to control the switching of various power supplies. The display screen 19 is set on the monitor, and the monitor is equipped with a controller. The controller and the display screen 19 control and display the position of the spray head in real time through the X-axis motor driver 36, Y-axis motor driver 37 and Z-axis motor driver 38. The air pressure sensor 30, temperature sensor 27 and humidity sensor 29 display the air pressure, temperature, humidity and other indicators inside the housing 1 in real time, thereby realizing precise control of the spraying conditions.

[0062] Optionally, as the air pressure and temperature inside the housing 1 increase, the distance between the nozzle 16 and the substrate surface is increased, and the spraying speed of the nozzle 16 is increased, thereby improving spraying efficiency, by controlling the X-axis motor driver 36, Y-axis motor driver 37, and Z-axis motor driver 38. Conversely, as the air pressure and temperature inside the housing 1 decrease, the distance between the nozzle 16 and the substrate surface is decreased, and the spraying speed of the nozzle 16 is reduced, by controlling the X-axis motor driver 36, Y-axis motor driver 37, and Z-axis motor driver 38, to ensure spraying effect. As the humidity inside the housing 1 increases, the distance between the nozzle 16 and the substrate surface is decreased, and the spraying speed of the nozzle 16 is reduced; conversely, as the humidity inside the housing 1 decreases, the distance between the nozzle 16 and the substrate surface is increased, and the spraying speed of the nozzle 16 is increased.

[0063] In other embodiments, optionally, the temperature, humidity, and air pressure inside the housing 1 are detected. By detecting these parameters, the spraying rate, spraying distance, and liquid output are further adjusted to maintain a consistent spraying effect. If an increase in ambient temperature, humidity, or spraying pressure is detected, the spraying rate is increased, the spraying distance is increased, and the liquid output is increased. Conversely, if a decrease in ambient temperature, humidity, or spraying pressure is detected, the spraying rate is slowed down, the spraying distance is reduced, and the liquid output is decreased.

[0064] In other embodiments, considering the influence of the pipe assembly 1401 and the air outlet 1402 on the temperature inside the housing 1, multiple temperature sensors are vertically arranged inside the housing 1. The temperature difference detected by each pair of adjacent temperature sensors is calculated, and then the average temperature difference is calculated. When the average temperature difference is greater than a preset value, it indicates that the temperature inside the housing 1 is uneven. At this time, the airflow rate of the heating fan 15 per unit time is appropriately increased to improve the uniformity of the overall ambient temperature inside the housing 1 by increasing the circulating air inside the housing 1. This continues until the average temperature difference is less than or equal to the preset value. Then, the airflow rate of the heating fan 15 per unit time is restored, so that the temperature inside the housing 1 reaches the goal of overall environmental uniformity in a short time, thereby improving the quality of the conductive film after spraying.

[0065] In other embodiments, the temperature, humidity, and air pressure within the housing 1 are weighted and summed, with positive weights for temperature and air pressure and negative weights for humidity. These weights can be obtained empirically or experimentally. As the weighted sum increases, the distance between the nozzle 16 and the substrate surface is increased, and the spraying speed of the nozzle 16 is increased, by controlling the X-axis motor driver 36, Y-axis motor driver 37, and Z-axis motor driver 38. Conversely, as the weighted sum decreases, the distance between the nozzle 16 and the substrate surface is decreased, and the spraying speed of the nozzle 16 is reduced, by controlling the X-axis motor driver 36, Y-axis motor driver 37, and Z-axis motor driver 38.

[0066] Example 2:

[0067] This embodiment provides a silver nanowire spraying method, which uses the silver nanowire spraying equipment as described in Embodiment 1, including: stirring the silver nanowire suspension in the raw material storage tank 6 using the stirrer 9; and transporting the silver nanowire suspension in the raw material storage tank 6 to the spray head 16 by the air compressor 10.

[0068] The heating substrate 14 and the heating fan 15 are used to uniformly heat the substrate surface on the heating substrate 14; the three-axis moving shaft 17 drives the nozzle 16 to move, and the nozzle 16 sprays silver nanowire suspension onto the substrate surface on the heating substrate 14.

[0069] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A silver nanowire spraying device, characterized in that, Includes a housing (1), a nozzle (16) is provided above the housing (1) via a three-axis moving shaft (17), and a heating plate (14) for placing a substrate is provided above the housing (1), and a heating fan (15) is provided near the heating plate (14). The housing (1) is provided with a box (5) and an air compressor (10) at the bottom. The box (5) and the air compressor (10) are respectively separated from the housing (1). A raw material storage tank (6) is provided on the box (5), and a stirrer (9) is provided on the raw material storage tank (6). The raw material storage tank (6) is connected to the nozzle (16) through the air compressor (10). The air compressor (10) is connected to a filter triplet (22), which is connected to the raw material storage tank (6) via a proportional valve (21). The housing (1) is provided with an exhaust port (12); an exhaust fan (13) is installed at the exhaust port (12); and a lighting tube (26) is provided inside the housing (1). The heating fan (15) includes a motor driver (32) and a (31) disposed on the motor driver (32); The nozzle (41) of the nozzle (16) is configured as a fan-shaped nozzle; Heating fans (15) are provided on both sides of the heating substrate (14). Pipe groups (1401) communicating with the heating fans (15) are installed on the left and right sides of the heating substrate (14). Multiple air outlets (1402) are opened on the pipe groups (1401). Two pipe groups (1401) are vertically arranged on both sides of the heating substrate (14). The pipe groups (1401) include multiple parallel pipes. The diameter of the multiple air outlets (1402) on each pipe gradually increases along the direction of hot air. Multiple temperature sensors are vertically arranged inside the housing (1). The temperature difference detected by each two adjacent temperature sensors is calculated, and then the average temperature difference of all temperature differences is calculated. When the average temperature difference is greater than the preset value, the air volume of the heating fan (15) per unit time is increased until the average temperature difference is less than or equal to the preset value, and then the air volume of the heating fan (15) per unit time is restored. The three-axis moving axis (17) includes an X-axis moving axis (33), a Y-axis moving axis (34), and a Z-axis moving axis (35); the X-axis moving axis (33) is connected to an X-axis motor driver (36), and X-axis limiters (39) are provided at both ends of the X-axis moving axis (33); the Y-axis moving axis (34) is connected to a Y-axis motor driver (37), and Y-axis limiters (40) are provided at both ends of the Y-axis moving axis (34); the Z-axis moving axis (35) is connected to a Z-axis motor driver (38); the nozzle (16) is mounted on the Z-axis moving axis (35); The housing (1) is provided with a display screen (19) and a controller is provided inside the display screen. The controller is connected to the display screen (19), the X-axis motor driver (36), the Y-axis motor driver (37), and the Z-axis motor driver (38). The housing (1) is provided with a temperature sensor (27), a humidity sensor (29), and a pressure sensor (30). The temperature sensor (27), the humidity sensor (29), and the pressure sensor (30) are connected to the controller. Each end of the three-axis moving shaft (17) has a buffer structure (1701). The buffer structure (1701) includes a base (1702), a buffer shaft (1703) slidably disposed in a preset sliding hole on the base (1702), and a spring (1704) sleeved on the buffer shaft (1703). When the shaft of the three-axis moving shaft (17) moves to the inflection point, the spring (1704) is compressed or stretched, thereby preventing vibration or instantaneous change in spraying speed when the direction of the nozzle (16) changes. The controller is used to control the position of the nozzle (16) in real time through the X-axis motor driver (36), the Y-axis motor driver (37) and the Z-axis motor driver (38), and to detect the temperature, humidity and air pressure inside the housing (1) in real time through the temperature sensor (27), the humidity sensor (29) and the air pressure sensor (30). When the ambient temperature and humidity increase, the spraying pressure increases, which accelerates the spraying rate, increases the spraying distance, and increases the liquid output. Conversely, when the ambient temperature decreases, the humidity decreases, and the spraying pressure decreases, the spraying rate slows down, the spraying distance decreases, and the liquid output decreases.

2. A method for spraying silver nanowires, characterized in that, The silver nanowire spraying equipment as described in claim 1 is used, comprising: stirring the silver nanowire suspension in the raw material storage tank (6) using the stirrer (9); and delivering the silver nanowire suspension in the raw material storage tank (6) to the spray head (16) by the air compressor (10). The heating substrate (14) and the heating fan (15) are used to uniformly heat the substrate surface on the heating substrate (14); the three-axis moving shaft (17) drives the nozzle (16) to move, and the nozzle (16) sprays silver nanowire suspension onto the substrate surface on the heating substrate (14). When the ambient temperature and humidity increase, the spraying pressure increases, which accelerates the spraying rate, increases the spraying distance, and increases the liquid output. Conversely, when the ambient temperature decreases, the humidity decreases, and the spraying pressure decreases, the spraying rate slows down, the spraying distance decreases, and the liquid output decreases.

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