Spraying machine

Abstract

The invention discloses a spraying machine which comprises a spraying system, a spraying system, a spraying system control system, a spraying system control system, a spraying system control system, a spraying system control system, a spraying system control system, a spraying system control system and a spraying system control system, the liquid drop controller is used for controlling the liquid drops sprayed from the spraying holes to have the same volume by sending a periodic pulse signal to the spraying unit; and the control system comprises a detection device and a control device which are electrically connected, and the control device is electrically connected with the flow control units of the spraying modules and controls the liquid flows of all the spraying units to be kept uniform and consistent. The control device can control the flow of the liquid flowing to each spraying unit through the flow control unit according to the numerical value, detected by the detection device, of each spraying unit, so that the flow of the liquid sprayed out of each spraying unit is kept uniform and consistent, and even if each spraying unit has manufacturing process errors, or the flow of the liquid sprayed out of each spraying unit is uniform. And even spraying of the liquid cannot be affected even if the spraying holes are abraded to different degrees.

Description

Technical Field

[0001] The present invention belongs to the field of spraying equipment, and particularly relates to a spraying machine. Background Art

[0002] Currently, spraying machines on the market usually have multiple nozzles. During spraying, due to manufacturing process errors of each nozzle, there will be certain differences in the nozzle hole sizes of different nozzles, resulting in different amounts of liquid (such as dyes or coatings) ejected by each nozzle at the same time. After the nozzles work for a long time, the particulate matter in the liquid will also cause different degrees of wear on each nozzle, making the nozzle hole sizes of each nozzle inconsistent, resulting in different amounts of liquid ejected by each nozzle at the same time, causing uneven spraying and poor spraying effect. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a spraying machine to solve the problem of uneven spraying.

[0004] To solve the above technical problem, the present invention adopts the following technical solution: A spraying machine, comprising: a spraying system, including a liquid source, a droplet controller, and at least two spraying modules. The spraying module includes a spraying unit with multiple nozzles and a flow control unit connected to the spraying unit. The spraying unit has a planar nozzle hole material layer and multiple nozzle holes. The diameters of the multiple nozzle holes are the same and are arranged at equal intervals in a first direction on the planar nozzle hole material layer. The central axes of the nozzle holes are perpendicular to the surface of the planar nozzle hole material layer. The number of nozzle holes of any spraying unit is greater than 10, and the diameter of the nozzle holes is less than 100 μm. The droplet controller controls the droplets ejected from the nozzle holes to have the same volume by sending periodic pulse signals to the spraying unit; a control system, including a detection device and a control device that are electrically connected. The control device is electrically connected to the flow control unit of the spraying module and controls the liquid flow rates of all spraying units to be uniformly consistent. The technical solution has the following technical effects:

[0005] The present invention provides a detection device and a flow control unit on the sprayer, so that the control device can control the liquid flow to each spray unit through the flow control unit according to the numerical value of each spray unit detected by the detection device, so that the liquid flow rate sprayed by each spray unit remains uniform. The setting of the droplet controller ensures that the droplets sprayed from the nozzle have the same volume. By arranging the nozzles of the spray units on a planar nozzle material layer, and the central axis of the nozzle is perpendicular to the surface of the planar nozzle material layer, the liquid in the spray unit can be sprayed in the same direction (i.e., the axial direction of the nozzle) during spraying. Because the multiple nozzles have the same diameter and are arranged at equal intervals along a first direction on the planar nozzle material layer, the liquid sprayed on the surface of the object can be kept uniform. Even if there are manufacturing process errors in each spray unit, or if the particles in the liquid cause different degrees of wear on the nozzle of each spray unit after the spray unit has been in operation for a long time, the uniform spraying of the liquid will not be affected, and there is no need to replace the spray unit, thereby ensuring that the sprayer always sprays uniformly and reducing the spraying cost.

[0006] In the above-mentioned sprayer, the detection device includes a flow sensor for detecting the flow of the flow control unit, the flow sensor is used to detect the flow of the flow control unit and provide real-time feedback to the control device, the control device controls the flow control unit according to the feedback of the flow sensor to ensure that the flow to the injection unit is uniform and stable; and / or, a pressure sensor for detecting the pressure of the injection unit, the pressure sensor is used to detect the pressure of the injection unit, when the pipeline is abnormal or the nozzle of the injection unit is blocked, the pressure of the injection unit will change, the pressure sensor transmits the pressure change to the control device, the control device can control the flow control unit according to the feedback of the pressure sensor, and then change the pressure of the injection unit to ensure that the pressure of each injection unit is stable. The control device can also issue an alarm to remind the user or shut down the machine according to the feedback of the pressure sensor when the pressure is too high to ensure safe use.

[0007] In the aforementioned sprayer, the number of detection devices, flow control units, and spray units is equal, and the three are arranged in a one-to-one correspondence. The flow control unit is connected to the spray unit and electrically connected to the control device. By arranging the detection devices, flow control units, and spray units in a one-to-one correspondence, each spray unit has a corresponding detection device and flow control unit for flow control. The one-to-one real-time control of the spray units by the detection devices can ensure that the liquid flow rate sprayed by each spray unit is the same, thereby achieving more uniform spraying.

[0008] In the above-mentioned spraying machine, the flow control unit is a flow controller or a pressure controller; the flow control unit is connected to the spraying unit and electrically connected to the control device. As the flow control unit, the flow controller has the advantages of high precision, high response speed, and high adaptability, enabling the flow control unit to quickly and accurately control the flow rate of the spraying unit and being less affected by the ambient temperature. The pressure controller ensures that the pressure of the spraying unit is stable at the set value by adjusting the valve. As the flow control unit, it has the advantages of good stability and a wide measurement range, making the flow control unit work stably and reliably.

[0009] In the above-mentioned spraying machine, the detection device is a flow sensor and / or a pressure sensor, and the flow control unit is an adjustable liquid pump. Using an adjustable liquid pump as the flow control unit simplifies the internal structure of the spraying machine, enabling the flow control unit to adjust both the flow rate and the pressure, making it more energy-efficient and efficient.

[0010] In the above-mentioned spraying machine, the spraying module includes an adjustable pressure source that provides pressure to the liquid source, and the output pressure of the adjustable pressure source is greater than 10 kPa. The adjustable pressure source is used to provide pressure to the liquid source to push the liquid in the liquid source to flow towards the spraying unit. By setting the output pressure of the adjustable pressure source to be greater than 10 kPa, the droplets ejected by the spraying unit are stable, and by changing the pressure provided to the liquid source, the pressure of the liquid flowing towards the spraying unit can be changed, so as to cooperate with the flow control unit to work, making the adjustment of the liquid flow rate ejected by the spraying unit more accurate and the spraying more uniform.

[0011] In the above-mentioned spraying machine, the flow control unit is an adjustable pressure source that provides pressure to the liquid source. The adjustable pressure source, the liquid source, the detection device, and the spraying unit are arranged in one-to-one correspondence, and the detection device is a flow sensor. The detection device can detect the flow rate of each spraying unit respectively and feedback it to the control device. The control device can adjust the pressure provided by the adjustable pressure source to the corresponding liquid source according to the feedback flow rate data to adjust the pressure of the liquid flowing from the liquid source to the spraying unit. The one-to-one real-time control of the detection device on the spraying unit can ensure that the liquid flow rate ejected by each spraying unit is the same, and thus make the spraying more uniform.

[0012] In the above-mentioned spraying machine, the spraying module further includes an adjustable pressure source. The number of the detection device, the flow control unit, and the spraying unit is the same and arranged in one-to-one correspondence. The flow control unit is an adjustable throttle valve, and the detection device is a flow sensor. An adjustable throttle valve is a valve that controls the fluid flow rate by changing the throttle section or the throttle length. Using an adjustable throttle valve as the flow control unit makes the adjustment ability of the flow control unit stronger. At the same time, the pressure loss is minimized as much as possible, thereby reducing the pressure drop and energy consumption of the liquid, and making the liquid flowing to the spraying unit maintain a certain pressure, and the spraying of the droplets is more stable and uniform.

[0013] In the above-mentioned spraying machine, the detection device is an optical color densitometer, and the detection device is located near the spraying unit for detecting the color density of the coating on the surface of the printing substrate. The optical color densitometer is used to detect the color density of the coating on the surface of the printing substrate, so as to detect the spraying uniformity, and the detection is more accurate and reliable. Or, the detection device is a film thickness gauge, and the detection device is located near the spraying unit for detecting the film thickness of the coating on the surface of the printing substrate. The film thickness gauge is used to detect the film thickness of the coating on the surface of the printing substrate, so as to detect the spraying uniformity, and the detection result is more accurate.

[0014] In the above-mentioned spraying machine, at least two spraying units are arranged side by side in the first direction, and each spraying unit includes at least two rows of spray holes staggered in the first direction. During spraying, the spray holes in the adjacent row can spray the interval positions between the spray holes in the other row to achieve mutual compensation. The multi-row staggered arrangement of spray holes makes the spraying points on the object more, and thus makes the surface spraying of the object more uniform.

[0015] In the above-mentioned spraying machine, the spraying system further includes a liquid outlet barrel. The spraying unit also has a liquid inlet and a liquid outlet. The liquid inlet is communicated with the liquid source, and the liquid outlet is communicated with the liquid outlet barrel. When the spraying system is turned on or the dye liquid is changed, the liquid outlet can be opened so that the dye liquid discharges the gas and dye liquid remaining in the pipeline before to the liquid outlet barrel to collect the waste liquid. After all the gas or waste liquid in the pipeline is discharged, the liquid outlet is closed for spraying to avoid pollution caused by the discharged dye liquid.

[0016] In the above-mentioned spraying machine, the liquid is a lithium battery insulating coating, or a display screen coating, or a thin film solar cell coating, or a textile dyeing liquid, or a textile color fixing liquid, or a textile functional coating, and the viscosity of the liquid < 50 cps. The viscosity of the liquid needs to meet less than 50 cps to avoid too high viscosity and difficulty in spraying the liquid from the spray holes.

[0017] The features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and specific embodiments:

[0019] Figure 1 It is a schematic internal structure diagram of the spraying machine in Embodiment 1;

[0020] Figure 2 It is a schematic internal structure diagram of the spraying machine in Embodiment 5;

[0021] Figure 3 It is a schematic internal structure diagram of the spraying machine in Embodiment 7.

[0022] Reference numerals:

[0023] 100. Control system; 110. Detection device; 120. Control device;

[0024] 200, injection system; 210, liquid source; 220, droplet controller; 230, injection module; 231, injection unit; 232, flow control unit; 240, adjustable pressure source. DETAILED DESCRIPTION

[0025] The present invention proposes a sprayer, comprising: a spray system, including a liquid source, a droplet controller, and at least two spray modules, the spray module including a spray unit having multiple nozzles and a flow control unit connected to the spray unit, the spray unit having a planar nozzle material layer and multiple nozzles, the multiple nozzles having the same diameter and being evenly spaced along a first direction on the planar nozzle material layer, the central axis of the nozzle being perpendicular to the surface of the planar nozzle material layer, the number of nozzles in any spray unit being greater than 10, the diameter of the nozzle being less than 100 μm, the droplet controller controlling the droplets ejected from the nozzles to have the same volume by sending periodic pulse signals to the spray units; and a control system including an electrically connected detection device and a control device, the control device being electrically connected to the flow control units of the spray modules and controlling the liquid flow rates of all spray units to remain uniform. The present invention provides a detection device and a flow control unit on the sprayer, so that the control device can control the liquid flow rate flowing to each spray unit through the flow control unit according to the values of each spray unit detected by the detection device, so that the liquid flow rate ejected by each spray unit remains uniform, and the droplet controller is configured to ensure that the droplets ejected from the nozzles have the same volume. By positioning the spray holes of the spray unit on a planar spray hole material layer, with the central axis of the spray hole perpendicular to the surface of the planar spray hole material layer, the liquid in the spray unit can be sprayed in the same direction (i.e., the axial direction of the spray hole) during spraying. Furthermore, because the multiple spray holes have the same diameter and are evenly spaced along a first direction on the planar spray hole material layer, the liquid sprayed on the surface of the object can be kept uniform. Even if there are manufacturing process errors in each spray unit, or if, after the spray unit has been in operation for a long time, particulate matter in the liquid causes different degrees of wear on the spray holes of each spray unit, this will not affect the uniform spraying of the liquid, and there is no need to replace the spray unit, thus ensuring that the spray machine always sprays uniformly and reducing spraying costs.

[0026] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0029] In the present invention, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0031] Example 1:

[0032] A spraying machine, such as Figure 1As shown, the system includes a spraying system 200 and a control system 100. The spraying system 200 includes a liquid source 210, a droplet controller 220 and a plurality of (two or more) spraying modules 230. The injection module 230 includes an injection unit 231 and a flow control unit 232. The injection unit 231 has multiple nozzles. The flow control unit 232 is connected to the injection unit 231 to control the flow rate of liquid sprayed by the injection unit 231. The number of nozzles of any injection unit 231 is greater than 10, so that the nozzles are densely arranged on the injection unit 231. The diameter of the nozzles is less than 100 μm to ensure that the sprayed liquid is relatively fine. A planar nozzle material layer is provided on the injection unit 231. The nozzles are provided on the planar nozzle material layer. The multiple nozzles have the same diameter and are arranged at equal intervals along the first direction on the planar nozzle material layer. The central axis of the nozzle is perpendicular to the surface of the planar nozzle material layer. The droplet controller 220 is provided on the injection unit 231. The droplet controller 220 sends a periodic pulse signal to the injection unit 231 to control the droplets sprayed from the nozzles to have the same volume. The control system 100 includes a detection device 110 and a control device 120, which are electrically connected to each other. The control device 120 is electrically connected to the flow control unit 232 of the injection module 230 to control the liquid (dye or paint) flow of all injection units 231 to remain uniform.

[0033] The present invention provides a detection device 110 and a flow control unit 232 on the sprayer, so that the control device 120 can control the liquid flow to each spray unit 231 through the flow control unit 232 according to the numerical value of each spray unit 231 detected by the detection device 110, so that the liquid flow rate sprayed by each spray unit 231 remains uniform. The setting of the droplet controller 220 ensures that the droplets sprayed from the nozzle have the same volume. By arranging the nozzle of the spray unit 231 on a planar nozzle material layer, and the central axis of the nozzle is perpendicular to the surface of the planar nozzle material layer, the liquid in the spray unit 231 can be sprayed in the same direction (i.e., the axial direction of the nozzle) during spraying. Because the multiple nozzles have the same diameter and are arranged at equal intervals along the first direction on the planar nozzle material layer, the liquid sprayed on the surface of the object can remain uniform. Even if there are manufacturing process errors in each spray unit 231, or after the spray unit 231 has been working for a long time, the particulate matter in the liquid causes different degrees of wear on the spray holes of each spray unit 231, it will not affect the uniform spraying of the liquid. There is no need to replace the spray unit 231, ensuring that the sprayer always sprays evenly, reducing the spraying cost.

[0034] In this embodiment, the detection device 110 is a flow sensor. The flow sensor is used to detect the flow rate of the flow control unit 232 and provide real-time feedback to the control device 120. The control device 120 controls the flow control unit 232 based on the feedback from the flow sensor to ensure that the flow rate flowing into the injection unit 231 is uniform and stable.

[0035] In this embodiment, the number of the detection device 110, the flow control unit 232, and the injection unit 231 is the same, and the three are arranged in one-to-one correspondence. The flow control unit 232 is connected to the injection unit 231 and is electrically connected to the control device 120. By arranging the detection device 110, the flow control unit 232, and the injection unit 231 in one-to-one correspondence, each injection unit 231 has a corresponding detection device 110 and flow control unit 232 for flow control. The one-to-one real-time control of the detection device 110 over the injection unit 231 can ensure that the liquid flow rates ejected by each injection unit 231 are the same, thereby making the spraying more uniform.

[0036] In this embodiment, the flow control unit 232 is a flow controller. The flow controller can adjust the valve opening to ensure that the flow rate is stable at the set value. The flow controller is connected to the injection unit 231 and is electrically connected to the control device 120. As the flow control unit 232, it has the advantages of high precision, high response speed, and high adaptability, enabling the flow control unit 232 to quickly and accurately control the flow rate of the injection unit 231 and being less susceptible to environmental temperature influence. Of course, it can be understood that in other embodiments, the flow control unit can also be a pressure controller. The pressure controller adjusts the valve to ensure that the pressure of the injection unit is stable at the set value. As the flow control unit, it has the advantages of good stability and a wide measurement range, making the flow control unit work stably and reliably; in other embodiments, the flow control unit can also be an adjustable liquid pump. Using the adjustable liquid pump as the flow control unit simplifies the internal structure of the spraying machine, enabling the flow control unit to adjust both the flow rate and the pressure, making it more energy-efficient and efficient.

[0037] In this embodiment, at least two injection units 231 are arranged side by side in the first direction to achieve a larger spraying width. Each injection unit 231 includes multiple rows (two rows or more) of spray holes. The adjacent two rows of spray holes are staggered in the first direction. When spraying, the spray holes in one row can spray the interval positions between the spray holes in the other row, achieving mutual compensation. The multi-row staggered arrangement of spray holes results in more spraying points on the object, thereby making the surface spraying of the object more uniform.

[0038] The injection system 200 further includes a liquid outlet barrel. Except for the spray holes, the injection unit 231 also has a liquid inlet and a liquid outlet. The liquid inlet is communicated with the liquid source 210, and the liquid outlet is communicated with the liquid outlet barrel. When the injection system 200 is opened or the dye liquid is changed in color, the liquid outlet can be opened so that the dye liquid discharges the gas and dye liquid remaining in the pipeline before to the liquid outlet barrel to collect the waste liquid. After all the gas or waste liquid in the pipeline is discharged, the liquid outlet is closed for spraying to avoid pollution caused by the discharged dye liquid.

[0039] The liquid in this embodiment can be one of lithium battery insulating paint, display screen paint, thin film solar cell paint, textile dyeing liquid, textile fixing liquid, and textile functional paint. The viscosity of the liquid needs to be less than 50 cps to avoid excessive viscosity and difficulty in spraying the liquid from the spray holes.

[0040] Embodiment Two:

[0041] The difference between this embodiment and Embodiment One is that in this embodiment, the detection device is a pressure sensor. The pressure sensor is used to detect the pressure of the injection unit. When the pipeline is abnormal or the spray holes of the injection unit are blocked, the pressure of the injection unit will change. The pressure sensor transmits the pressure change to the control device, and the control device can control the flow control unit according to the feedback of the pressure sensor, thereby changing the pressure of the injection unit to ensure the smoothness of the pressure and flow of each injection unit. Moreover, the control device can also give an alarm to remind the user or stop the machine when the pressure is too high according to the feedback of the pressure sensor to ensure the use safety.

[0042] Embodiment Three:

[0043] The difference between this embodiment and Embodiment One is that on the basis of Embodiment One, the detection device further includes a pressure sensor, that is, the detection device includes a flow sensor and a pressure sensor. The pressure sensor is used to detect the pressure of the injection unit. When the pipeline is abnormal or the spray holes of the injection unit are blocked, the pressure of the injection unit will change. The pressure sensor transmits the pressure change to the control device, and the control device can control the flow control unit according to the feedback of the pressure sensor, thereby changing the pressure of the injection unit to ensure the smoothness of the pressure of each injection unit. The control device can also give an alarm to remind the user or stop the machine when the pressure is too high according to the feedback of the pressure sensor to ensure the use safety.

[0044] In this embodiment, the flow sensor and the pressure sensor work together to make the liquid ejected from the injection unit uniform. Even if one of the flow sensor and the pressure sensor fails, it can still ensure the stable control of the flow control unit by the control device, and thus ensure the uniformity of the droplets ejected from the injection unit.

[0045] Embodiment Four:

[0046] The difference between this embodiment and Embodiment 3 is that in this embodiment, the flow control unit is an adjustable liquid pump. The adjustable liquid pump is connected in series with the flow sensor and is arranged upstream of the pressure sensor. The adjustable liquid pump can adjust the flow rate by changing the pump speed, impeller diameter or blade angle, or can control the pressure by adjusting the outlet pressure of the pump. Using the adjustable liquid pump as the flow control unit simplifies the internal structure of the spraying machine, enables the flow control unit to adjust both the flow rate and the pressure, and is more energy-efficient.

[0047] Embodiment 5:

[0048] The difference between this embodiment and Embodiment 1 is that as Figure 2 shown, on the basis of Embodiment 1, the spraying module of this embodiment further includes an adjustable pressure source 240. The adjustable pressure source 240 is used to provide pressure to the liquid source 210 to push the liquid in the liquid source 210 to flow towards the spraying unit 231. The output pressure of the adjustable pressure source 240 is greater than 10 kPa. By setting the output pressure of the adjustable pressure source 240 to be greater than 10 kPa, the droplets ejected by the spraying unit 231 are stable, and by changing the pressure provided to the liquid source 210, the pressure of the liquid flowing towards the spraying unit 231 can be changed, so as to cooperate with the flow control unit 232 to work, and the adjustment of the liquid flow rate ejected by the spraying unit 231 is more accurate, making the spraying more uniform.

[0049] Embodiment 6:

[0050] The difference between this embodiment and Embodiment 5 is that in this embodiment, the flow control unit is an adjustable throttle valve. An adjustable throttle valve is a valve that controls the fluid flow rate by changing the throttle section or throttle length. Using the adjustable throttle valve as the flow control unit makes the adjustment ability of the flow control unit stronger. At the same time, the pressure loss is minimized as much as possible, thereby reducing the pressure drop and energy consumption of the liquid, so that the liquid flowing to the spraying unit is maintained at a certain pressure, and the ejection of the droplets is more stable and uniform.

[0051] Embodiment 7:

[0052] The difference between this embodiment and Embodiment 1 is that as Figure 3As shown in the figure, in this embodiment, the flow control unit 232 is an adjustable pressure source. The adjustable pressure source is used to provide pressure to the liquid source 210 to push the liquid in the liquid source 210 to flow towards the ejection unit 231. The number of the adjustable pressure source, the liquid source 210, the detection device 110, and the ejection unit 231 is the same and they are arranged in one-to-one correspondence, so that the detection device 110 can detect the flow rate of each ejection unit 231 respectively and feedback it to the control device 120. The control device 120 can adjust the pressure provided by the adjustable pressure source to the corresponding liquid source 210 according to the feedback flow rate data, so as to adjust the liquid pressure flowing from the liquid source 210 to the ejection unit 231. The one-to-one real-time control of the ejection unit 231 by the detection device 110 can ensure that the liquid flow rates ejected by each ejection unit 231 are the same, thereby making the spraying more uniform.

[0053] Embodiment Eight:

[0054] The difference between this embodiment and Embodiment One is that in this embodiment, the detection device is an optical densitometer. The optical densitometer is located near the ejection unit to detect the color density of the coating on the surface of the substrate, so as to achieve the detection of spraying uniformity, and the detection is more accurate and reliable.

[0055] Embodiment Nine:

[0056] The difference between this embodiment and Embodiment One is that in this embodiment, the detection device is a film thickness gauge. The detection device is located near the ejection unit to detect the film thickness of the coating on the surface of the substrate, so as to achieve the detection of spraying uniformity, and the detection result is more accurate.

[0057] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A spraying machine, characterized in that, Comprising: A jetting system, including a liquid source, a droplet controller, and at least two jetting modules. Each jetting module includes a jetting unit with multiple nozzles and a flow control unit connected to the jetting unit. The jetting unit has a planar nozzle material layer and multiple nozzles. The diameters of the multiple nozzles are the same and are arranged at equal intervals along a first direction on the planar nozzle material layer. The central axes of the nozzles are perpendicular to the surface of the planar nozzle material layer. The number of nozzles in any jetting unit is greater than 10. The diameter of the nozzles is less than 100 μm. The droplet controller controls the droplets ejected from the nozzles to have the same volume by sending periodic pulse signals to the jetting unit. A control system, including a detection device and a control device that are electrically connected. The control device is electrically connected to the flow control unit of the jetting module and controls the liquid flow rates of all jetting units to be uniform.

2. The spraying machine according to claim 1, wherein: The detection device includes a flow sensor for detecting the flow rate of the flow control unit and / or a pressure sensor for detecting the pressure of the jetting unit.

3. The spraying machine according to claim 1, characterized in that: The number of the detection device, the flow control unit, and the jetting unit is the same, and the three are arranged in one-to-one correspondence. The flow control unit is connected to the jetting unit and is electrically connected to the control device.

4. A spraying machine according to claim 1 or 3, characterized in that: The flow control unit is a flow controller or a pressure controller; the flow control unit is connected to the jetting unit and is electrically connected to the control device.

5. A spraying machine according to claim 1 or 3, characterized in that: The detection device is a flow sensor and / or a pressure sensor, and the flow control unit is an adjustable liquid pump.

6. A spraying machine according to claim 1 or 3, characterized in that: The jetting module includes an adjustable pressure source for providing pressure to the liquid source, and the output pressure of the adjustable pressure source is greater than 10 kPa.

7. A spraying machine according to claim 1, characterized in that: The flow control unit is an adjustable pressure source for providing pressure to the liquid source. The adjustable pressure source, the liquid source, the detection device, and the jetting unit are arranged in one-to-one correspondence, and the detection device is a flow sensor.

8. A spraying machine according to claim 1, characterized in that: The jetting module further includes an adjustable pressure source. The number of the detection device, the flow control unit, and the jetting unit is the same and is arranged in one-to-one correspondence. The flow control unit is an adjustable throttle valve, and the detection device is a flow sensor.

9. The paint spraying machine according to claim 1, wherein: The detection device is an optical densitometer, and the detection device is located near the jetting unit to detect the color density of the coating on the surface of the substrate; or, the detection device is a film thickness gauge, and the detection device is located near the jetting unit to detect the film thickness of the coating on the surface of the substrate.

10. A spraying machine according to claim 1, characterized in that: At least two jetting units are arranged along the first direction, and each jetting unit includes at least two rows of nozzles that are staggered along the first direction.

11. A spraying machine according to claim 1, characterized in that: The jetting system further includes a liquid outlet barrel. The jetting unit further has a liquid inlet and a liquid outlet. The liquid inlet is communicated with the liquid source, and the liquid outlet is communicated with the liquid outlet barrel.

12. A spraying machine according to claim 1, characterized in that: The liquid is a lithium battery insulating coating, or a display screen coating, or a thin film solar cell coating, or a textile dyeing solution, or a textile color fixing solution, or a textile functional coating, and the viscosity of the liquid is less than 50 cps.

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