Liquid supply system, spraying system and method for controlling liquid supply system

Abstract

The invention relates to a liquid supply system, a spraying system and a method for controlling the liquid supply system. The liquid supply system comprises a liquid supply unit used for containing liquid to be sprayed, and the liquid supply unit is communicated with a first connector of a pressure bottle through a first liquid supply pump; a second connector of the pressure bottle is communicated with the main liquid supply pipeline; the main liquid supply pipeline is communicated with a liquid inlet of the spray head, and the main liquid supply pipeline is at least provided with an electromagnetic valve assembly and a hydraulic detection device; one end of the safety bottle is communicated with a gas source containing compressed gas through a proportional valve, and the other end of the safety bottle is communicated with the interaction opening of the pressure bottle; and the control device is configured to adjust the opening degree of the proportional valve based on the air pressure at the proportional valve, so that the hydraulic pressure on the main liquid supply pipeline is adjusted by adjusting the air pressure of the pressure bottle. According to the scheme, the stable state can be quickly recovered, and the spraying quality can be remarkably improved.

Description

Technical Field

[0001] The present disclosure generally relates to spraying equipment and its control, and specifically, to a liquid supply system, a spraying system, and a method for controlling the liquid supply system. Background Art

[0002] For inkjet printing or other spraying systems, their liquid supply systems and their control are very important. In traditional liquid supply systems for nozzles and their control methods, a first liquid supply pump is usually configured in the liquid supply pipeline, and the hydraulic pressure and flow rate in the liquid supply pipeline are controlled by directly controlling the rotation speed of the first liquid supply pump. Since there is a large inertia in the rotation speed adjustment of the first liquid supply pump, when the system is in an unstable state, it takes a long time for the system to return to a stable state. In addition, the above-mentioned inertia is also likely to cause fluctuations in the liquid supply pulse of the nozzle, thereby affecting the spraying (such as but not limited to printing) quality.

[0003] In summary, in traditional liquid supply systems and their control methods, the deficiencies are as follows: when the system is in an unstable state, it takes a long time to return to a stable state, and it is likely to cause fluctuations in the liquid supply pulse of the nozzle, thereby affecting the spraying quality. Summary of the Invention

[0004] The present disclosure provides a liquid supply system, a spraying system, and a method for controlling the liquid supply system, which can quickly return to a stable state when the system encounters an unstable state and can significantly improve the spraying quality.

[0005] According to a first aspect of the present disclosure, a liquid supply system is provided. The liquid supply system is used to supply a liquid to be sprayed to a nozzle. The liquid supply system includes: a liquid supply unit for accommodating the liquid to be sprayed, and the liquid supply unit is communicated with a first interface of a pressure bottle via a first liquid supply pump; a pressure bottle, a second interface of the pressure bottle is communicated with a main liquid supply pipeline; a main liquid supply pipeline, the main liquid supply pipeline is connected to an inlet of the nozzle, and at least an electromagnetic valve assembly and a hydraulic detection device are arranged on the main liquid supply pipeline; a safety bottle, one end of the safety bottle is communicated with a gas source containing compressed gas via a proportional valve, and the other end of the safety bottle is communicated with an interaction port of the pressure bottle; and a control device configured to adjust the opening degree of the proportional valve based on the air pressure at the proportional valve, so as to adjust the hydraulic pressure on the main liquid supply pipeline by adjusting the air pressure of the pressure bottle.

[0006] In some embodiments, the liquid supply system further includes: a liquid level detection device arranged inside the pressure bottle and configured to detect the liquid level in the pressure bottle; and a pressure detection device arranged below the pressure bottle and configured to detect the pressure exerted by the pressure bottle on the pressure detection device; the control device is further configured to control the first liquid supply pump according to the liquid level and the pressure, so as to control the liquid level in the pressure bottle.

[0007] In some embodiments, the control device is further configured to determine that when the liquid level detected by the liquid level detection device corresponds to the target liquid level, the pressure detected by the pressure detection device is the target liquid level pressure, and adjust the first liquid supply pump according to the pressure detected by the pressure detection device and the target liquid level pressure, so as to make the liquid level in the pressure bottle match the target liquid level; the pressure detection device is a gravity sensor, and the pressure detected by the pressure detection device is associated with the sum of the weight of the pressure bottle and the liquid to be sprayed contained in the pressure bottle.

[0008] In some embodiments, the liquid supply system further includes: a cleaning liquid container for containing cleaning liquid, and the cleaning liquid container is communicated with the second interface of the electromagnetic valve assembly via a second liquid supply pump; the electromagnetic valve assembly at least includes: a first interface communicated with the main liquid supply pipeline; a second interface; and a third interface communicated with the liquid inlet of the spray head; the control device is further configured to at least one of the following: control the electromagnetic valve assembly to connect the second interface and the third interface thereof, and control the second liquid supply pump to rotate forward to clean the spray head; and control the electromagnetic valve assembly to connect the second interface and the first interface thereof, and control the second liquid supply pump to rotate forward and the first liquid supply pump to rotate reversely to clean the safety bottle.

[0009] In some embodiments, the liquid supply system further includes: a moisturizing liquid container configured to contain moisturizing liquid, and the moisturizing liquid container is communicated with the fourth interface of the electromagnetic valve assembly via a third liquid supply pump; the electromagnetic valve assembly further includes a fourth interface; the control device is further configured to control the electromagnetic valve assembly to connect the fourth interface and the third interface thereof, and control the third liquid supply pump to rotate forward, so that the moisturizing liquid enters the spray head to moisturize the spray head.

[0010] In some embodiments, the liquid supply system further includes a first electromagnetic valve; the electromagnetic valve assembly includes a sixth electromagnetic valve; the first liquid supply pump is configured between the first electromagnetic valve and the fourth electromagnetic valve, and the fourth electromagnetic valve is configured to be in parallel with the pressure bottle; the control device is further configured to obtain the hydraulic detection data detected by the hydraulic detection device, and turn on or off the power supply of the electromagnetic valve, the proportional valve, and the first liquid supply pump.

[0011] In some embodiments, the liquid supply system further includes: a cleaning liquid container for containing cleaning liquid; a first three-way solenoid valve configured to connect the deionized water container or air to the input channel of the liquid supply unit; a second three-way solenoid valve configured to connect one end of the first solenoid valve to the input channel of the liquid supply unit or the internal channel of the liquid supply unit; a waste liquid container configured to contain waste liquid; a seventh solenoid valve configured between the waste liquid container and the liquid outlet of the nozzle; a moisturizing liquid container configured to contain moisturizing liquid; a second solenoid valve disposed between the moisturizing liquid container and the main liquid supply pipeline and configured to supply the moisturizing liquid contained in the moisturizing liquid container to the main liquid supply pipeline when the power supply of the second solenoid valve is turned on; a first coupling device configured to connect and disconnect the pipeline on the input side of the first solenoid valve from the output channel of the ink supply unit; a second coupling device configured to connect and disconnect the input channel of the ink supply unit from the first three-way solenoid valve; and a fifth solenoid valve configured between the liquid output end of the safety bottle and the waste liquid container.

[0012] In some embodiments, the liquid supply system further includes: a flushing nozzle including a nozzle and an input channel, the input channel of the flushing nozzle being respectively connected to the cleaning liquid pipeline and the air pipeline, the flushing nozzle being configured to spray the cleaning liquid or air input through the input channel through the nozzle based on a nozzle surface flushing instruction and move from one end of the nozzle to the other end along the extending direction of the nozzle; a fourth liquid supply pump configured on the cleaning liquid pipeline, deionized water being supplied to the input end of the fourth liquid supply pump, and the output end of the fourth liquid supply pump being connected to an eighth solenoid valve; an eighth solenoid valve configured on the cleaning liquid pipeline and configured to supply the cleaning liquid output by the fourth liquid supply pump to the input channel of the flushing nozzle when the power supply of the eighth solenoid valve is turned on; and a ninth solenoid valve configured on the air pipeline and configured to supply compressed air from the air pipeline to the input channel of the flushing nozzle when the power supply of the ninth solenoid valve is turned on.

[0013] According to a second aspect of the present disclosure, a spraying system is provided. The spraying system includes a liquid supply system according to the first aspect of the present disclosure; one or more nozzles for spraying a liquid to be sprayed on a target object, the nozzle including: a capillary group for outputting the liquid to be sprayed; a flow channel for supplying the liquid to be sprayed from the liquid supply system to each capillary in the capillary group, the flow channel communicating with the liquid inlet and the liquid outlet.

[0014] According to a third aspect of the present disclosure, a method for controlling a liquid supply system is provided. The liquid supply system is the liquid supply system according to the first aspect of the present disclosure. The method includes: in response to detecting a start spraying instruction, turning on the power supply of the first liquid supply pump and the proportional valve, so that the liquid to be sprayed in the liquid supply unit flows through the pressure bottle; adjusting the rotation speed of the first liquid supply pump based on the obtained liquid level data in the pressure bottle; determining whether the hydraulic detection data on the main liquid supply pipeline is greater than or equal to a predetermined hydraulic threshold; in response to determining that the hydraulic detection data on the main liquid supply pipeline is greater than or equal to the predetermined hydraulic threshold, controlling the solenoid valve assembly so that the liquid to be sprayed enters the liquid inlet of the spray head; and adjusting the opening degree of the proportional valve so that the liquid to be sprayed provided to the spray head reaches a predetermined flow rate.

[0015] In some embodiments, the method further includes: in response to detecting a start spraying instruction, turning on the power supply of the first solenoid valve, the first liquid supply pump, the third solenoid valve, and the proportional valve, so that the liquid to be sprayed in the liquid supply unit flows through the pressure bottle; and in response to determining that the hydraulic detection data on the main liquid supply pipeline is greater than or equal to the predetermined hydraulic threshold, turning on the power supply of the sixth solenoid valve so that the liquid to be sprayed enters the liquid inlet of the spray head via the sixth solenoid valve.

[0016] In some embodiments, the method further includes: obtaining the flow detection data on the main liquid supply pipeline and the movement speed data of the target object to be sprayed; and adjusting the opening degree of the proportional valve based on the ratio between the flow detection data and the movement speed data so that the ratio remains constant.

[0017] In some embodiments, the method further includes: in response to detecting a stop spraying instruction, maintaining the power supply of the first solenoid valve, the sixth solenoid valve, and the first liquid supply pump, turning on the power supply of the fourth solenoid valve, and turning off the power supply of other valves and pumps. The fourth solenoid valve is configured to be connected in parallel with the pressure bottle; making the first liquid supply pump reverse; determining whether a first predetermined time interval is reached, the first predetermined time interval being associated with the number of capillaries configured in the spray head and the length of the main liquid supply pipeline; and in response to determining that the first predetermined time interval has been reached, turning off the power supply of the fourth solenoid valve, the sixth solenoid valve, and the first liquid supply pump.

[0018] In some embodiments, the method further includes: in response to detecting a liquid to be sprayed recovery instruction, turning on the power supply of the first solenoid valve, the third solenoid valve, and the first liquid supply pump, and turning off the power supply of other valves and pumps; making the first liquid supply pump reverse; determining whether a second predetermined time interval is reached; and in response to determining that the second predetermined time interval has been reached, turning off the power supply of the first solenoid valve, the third solenoid valve, and the first liquid supply pump.

[0019] In some embodiments, the method further includes: in response to detecting a cleaning pipeline instruction, turning on the power supply of the second three-way solenoid valve so that the cleaning liquid container is communicated with the first solenoid valve; turning on the power supplies of the first solenoid valve, the third solenoid valve, the first liquid supply pump, the fourth solenoid valve, the sixth solenoid valve, the seventh solenoid valve, and the stirrer configured for the pressure bottle, and turning off the power supplies of other valves and pumps so that the cleaning liquid in the cleaning liquid container fills the main liquid supply pipeline, the nozzle, and the pressure bottle; determining whether a third predetermined time interval has been reached; and in response to determining that the third predetermined time interval has been reached, turning off the power supplies of the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve; in response to detecting a signal of the highest liquid level value of the pressure bottle, turning off the power supplies of the third solenoid valve and the first liquid supply pump, and causing the stirrer to stir; and in response to determining that a fourth predetermined time interval has been reached, turning off the power supply of the stirrer.

[0020] In some embodiments, the method further includes: in response to detecting a liquid emptying instruction in the capillary, turning on the power supplies of the first three-way solenoid valve and the second three-way solenoid valve so that air is communicated with the first solenoid valve; turning on the power supplies of the first solenoid valve, the third solenoid valve, the first liquid supply pump, the fourth solenoid valve, the sixth solenoid valve, the seventh solenoid valve, and turning off the power supplies of other valves and pumps, and causing the air to empty the liquid in the main liquid supply pipeline and the pressure bottle; determining whether a fifth predetermined time interval has been reached; and in response to determining that the fifth predetermined time interval has been reached, turning off the power supply of the seventh solenoid valve so that the air empties the liquid in the capillary configured for the nozzle.

[0021] In some embodiments, the method further includes: in response to detecting a shutdown moisturizing instruction, turning on the power supply of the second solenoid valve so that the moisturizing liquid container is communicated with the main liquid supply pipeline; turning on the first liquid supply pump, the fourth solenoid valve, the sixth solenoid valve, and turning off the power supplies of other valves and pumps, and causing the moisturizing liquid from the moisturizing liquid container to fill the main liquid supply pipeline and the nozzle; determining whether a sixth predetermined time interval has been reached; and in response to determining that the sixth predetermined time interval has been reached, turning off the power supplies of the fourth solenoid valve and the sixth solenoid valve.

[0022] In some embodiments, the method further includes: in response to detecting a nozzle surface flushing instruction, turning on the power supplies of the eighth solenoid valve and the fourth liquid supply pump to supply cleaning liquid from the cleaning liquid container to the input channel of the flushing nozzle, where the eighth solenoid valve and the fourth liquid supply pump are connected between the cleaning liquid container and the input channel of the flushing nozzle; controlling the flushing nozzle to move from one end of the nozzle to the other end along the extending direction of the nozzle so as to spray the cleaning liquid output from the nozzle of the flushing nozzle onto the nozzle surface, thereby cleaning the residual liquid to be sprayed on the nozzle surface; turning on the power supply of the ninth solenoid valve and turning off the power supplies of the eighth solenoid valve and the fourth liquid supply pump so that air is supplied to the input channel of the flushing nozzle via the ninth solenoid valve; and controlling the flushing nozzle to move from one end of the nozzle to the other end along the extending direction of the nozzle so as to blow dry the cleaning liquid on the nozzle surface with the air output from the nozzle of the flushing nozzle.

[0023] In some embodiments, the method further includes: in response to detecting a pressure bottle detection instruction, turning on the power supplies of the fifth solenoid valve and the proportional valve and turning off the power supplies of other valves and pumps; obtaining the float detection signal of the pressure bottle; and in response to determining that a sixth predetermined time interval has elapsed, turning off the power supplies of the fifth solenoid valve and the proportional valve.

[0024] In some embodiments, the method further includes: in response to detecting a liquid supply instruction for the liquid to be sprayed, turning on the power supplies of the first solenoid valve, the third solenoid valve, the fourth solenoid valve, the sixth solenoid valve, the seventh solenoid valve, and the first liquid supply pump so that the liquid to be sprayed fills the main liquid supply pipeline, the nozzle, and the pressure bottle; in response to determining that a seventh predetermined time interval has elapsed, turning off the power supplies of the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve; and in response to detecting the liquid level data indicating that the liquid level in the pressure bottle reaches a predetermined intermediate position, turning off the power supplies of the third solenoid valve and the first liquid supply pump.

[0025] In some embodiments, the method further includes: in response to detecting a nozzle cleaning instruction, controlling the solenoid valve assembly so that the second interface and the third interface of the solenoid valve assembly are connected and turning on the power supply of the stirrer configured for the pressure bottle; and making the second liquid supply pump rotate forward so that the cleaning liquid enters the nozzle.

[0026] In some embodiments, the method further includes: in response to detecting a cleaning pipeline instruction, controlling the solenoid valve assembly to connect the second interface and the first interface of the solenoid valve assembly, disconnecting the power supply of the eighth solenoid valve, where the eighth solenoid valve is connected between the first liquid supply pump and the first interface of the pressure bottle; making the second liquid supply pump rotate forward so that the cleaning liquid in the cleaning liquid container enters the main liquid supply pipeline and the pressure bottle; in response to detecting the signal of the highest liquid level value of the pressure bottle, controlling the solenoid valve assembly to disconnect between the second interface and the first interface of the solenoid valve assembly and disconnecting the power supply of the second liquid supply pump, and making the stirrer stir; and in response to determining that a fourth predetermined time interval has been reached, turning off the power supply of the stirrer; turning on the power supply of the eighth solenoid valve and making the first liquid supply pump rotate in reverse so as to discharge the cleaned cleaning liquid.

[0027] The Summary of the Invention section is provided to introduce a selection of concepts in a simplified form, which will be further described in the Detailed Description section below. The Summary of the Invention section is not intended to identify the key features or main features of the present disclosure, nor is it intended to limit the scope of the present disclosure. Brief Description of the Drawings

[0028] Figure 1 A schematic diagram of a spraying system according to an embodiment of the present disclosure is shown.

[0029] Figure 2 A flowchart of a method for controlling a liquid supply system according to an embodiment of the present disclosure is shown.

[0030] Figure 3 A flowchart of a method for providing a liquid to be sprayed according to an embodiment of the present disclosure is shown.

[0031] Figure 4 A flowchart of a method for cleaning a spraying system according to an embodiment of the present disclosure is shown.

[0032] Figure 5 A flowchart of a method for making the liquid supply match the spraying speed according to an embodiment of the present disclosure is shown.

[0033] Figure 6 A flowchart of a method for stopping spraying according to an embodiment of the present disclosure is shown.

[0034] Figure 7 A flowchart of a method for recycling the liquid to be sprayed according to an embodiment of the present disclosure is shown.

[0035] Figure 8 A flowchart of a method for flushing the surface of a nozzle according to an embodiment of the present disclosure is shown.

[0036] Figure 9 A block diagram of an electronic device suitable for implementing the embodiments of the present disclosure is schematically shown.

[0037] Figure 10 Shows a schematic diagram of a spraying system according to an embodiment of the present disclosure.

[0038] Figure 11 Shows a sampling schematic diagram of the flow rate of the liquid to be sprayed corresponding to this liquid level control method according to an embodiment of the present disclosure.

[0039] Figure 12 Shows a sampling schematic diagram of the flow rate of the liquid to be sprayed corresponding to this liquid level control method according to an embodiment of the present disclosure.

[0040] Figure 13 Shows a flowchart of a method for controlling a liquid supply system according to an embodiment of the present disclosure.

[0041] Figure 14 Shows a flowchart of a method for cleaning a spraying system according to an embodiment of the present disclosure.

[0042] Figure 15 Shows a flowchart of a method for cleaning a spraying system according to an embodiment of the present disclosure.

[0043] In each of the drawings, the same or corresponding reference numerals denote the same or corresponding parts. Detailed Description of the Specific Embodiment

[0044] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0045] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.

[0046] As mentioned above, in the traditional liquid supply system and its control method, the deficiencies are as follows: when the system is in an unstable state, it takes a long time to return to the stable state, and it is easy to cause fluctuations in the liquid supply pulse of the nozzle, thereby affecting the spraying quality.

[0047] To at least partially address one or more of the above problems and other potential problems, example embodiments of the present disclosure propose a liquid supply system. In this liquid supply system, by connecting one end of a safety bottle to a compressed gas via a proportional valve, connecting the other end of the safety bottle to a pressure bottle in gas communication, and connecting the pressure bottle to a main liquid supply pipeline via a third solenoid valve, and by adjusting the air pressure in the safety bottle to adjust the hydraulic pressure on the main liquid supply pipeline, the liquid supply system of the present disclosure adjusts the hydraulic pressure and flow rate on the main liquid supply pipeline by adjusting the air pressure in the pressure bottle, avoiding the problem of large inertia caused by adjusting the hydraulic pressure and flow rate on the main liquid supply pipeline by adjusting the rotation speed of the first liquid supply pump, and enabling the system to quickly recover from an unstable state to a stable state. And it can also avoid the inertia that is likely to cause fluctuations in the liquid supply pulse of the nozzle. Therefore, when the system of the present disclosure encounters an unstable state, it can quickly return to a stable state and can significantly improve the spraying quality.

[0048] Figure 1 FIG. shows a schematic diagram of a spraying system according to an embodiment of the present disclosure. As Figure 1 shown, the spraying system 100 includes, for example, a liquid supply system, and one or more nozzles 160. Figure 1 Only one nozzle 160 is schematically shown therein. The liquid supply system is used to supply the liquid to be sprayed to the nozzle 160. The nozzle is used to output the liquid to be sprayed to a target object (not shown, such as a substrate like a fabric). In some embodiments, the spraying system 100 includes, for example, a plurality of nozzles 160, and the resolutions (Dot Per Inch, abbreviated as DPI) of the plurality of nozzles 160 can be the same or different.

[0049] Regarding each nozzle 160, it at least includes: a capillary group 166 and a flow channel ( Figure 1 not shown in the figure). The capillary group 166 is used to output the liquid to be sprayed. The flow channel is used to supply the liquid to be sprayed from the liquid supply system to each capillary in the capillary group 166. The flow channel is in communication with the liquid inlet 162 and the liquid outlet 164.

[0050] Regarding the liquid supply system, it at least includes: a liquid supply unit 110, a main liquid supply pipeline 130, a pressure bottle 140, and a safety bottle 150. In some embodiments, the liquid supply system further includes a control device 102.

[0051] Regarding the liquid supply unit 110, it is at least used to hold the liquid to be sprayed. The liquid to be sprayed in the liquid supply unit 110 is provided to the main liquid supply pipeline 130 via a first solenoid valve 120. In some embodiments, the liquid supply unit 110 is connected to one end of the main liquid supply pipeline 130 through a first coupling device 112, and is connected to air or a cleaning liquid pipeline through a second coupling device 114. Thus, the present disclosure can conveniently replace the liquid supply unit. The liquid supply unit 110 is, for example, an ink bucket.

[0052] Regarding the main liquid supply pipeline 130, it is used to convey the liquid to be sprayed to the nozzle 160. The main liquid supply pipeline 130 is communicated with the liquid inlet of the nozzle. For example, one end of the main liquid supply pipeline 130 is communicated with the liquid supply unit 110 via the first coupling device 112. The other end of the main liquid supply pipeline 130 is communicated with the liquid inlet 162 of the nozzle 160. At least a first solenoid valve 120, a sixth solenoid valve 132, a first liquid supply pump 122 and a hydraulic detection device 128 are arranged on the main liquid supply pipeline 130.

[0053] Regarding the solenoid valve, for example, it includes a two-way valve and a three-way solenoid valve. Among them, the first solenoid valve 120, the second solenoid valve 182, the third solenoid valve 142, the fourth solenoid valve 124, the fifth solenoid valve 154, the sixth solenoid valve 132, and the seventh solenoid valve 168 are normally closed two-way valves. It should be understood that when the solenoid valve is not powered, it is in a closed state and the fluid cannot pass through the solenoid valve. Regarding the three-way solenoid valve, for example, it includes: a first three-way solenoid valve 172 and a second three-way solenoid valve 116. The first three-way solenoid valve 172 or the second three-way solenoid valve 116 respectively includes: a COM port, an NC port, and a NO port. It should be understood that when the three-way solenoid valve is in an unpowered state, the fluid can flow between the COM port and the NO port; when the three-way solenoid valve is in a powered state, the fluid can flow between the COM port and the NC port.

[0054] Regarding the pressure bottle 140, it is configured with a first interface 143, a second interface 135, an interaction port 148 and a stirrer 146. The first interface 143 of the pressure bottle 140 is connected to the main liquid supply pipeline 130 via the third solenoid valve 142. The second interface 145 of the pressure bottle 140 is in one-way communication with the main liquid supply pipeline 130 (for example, the second interface 145 of the pressure bottle 140 is connected to the main liquid supply pipeline 130 through a one-way valve 144). The first interface 143 of the pressure bottle 140 is configured as a liquid inlet, and the second interface 145 of the pressure bottle 140 is configured as a liquid outlet.

[0055] In some embodiments, a liquid level detection device is arranged in the pressure bottle 140. The liquid level detection device includes, for example, a first liquid level gauge 141, a second liquid level gauge 147, and a third liquid level gauge 149. The liquid level detection device is used to detect multiple liquid level positions such as the high position, the middle position, and the low position of the liquid level in the pressure bottle 140. So as to make the liquid level in the pressure bottle 140 fluctuate within a predetermined range from the middle position. Thus, the present disclosure can reduce the fluctuation of the liquid level. For example, in the steady-state working condition, the fluctuation range of the flow rate of the present disclosure fluctuates within the range of -1% to 1% of the total flow rate. In addition, the present disclosure also makes the liquid level in the pressure bottle 140 lower than the high position to prevent the liquid in the pressure bottle 140 from entering the safety bottle 150 through the interaction port.

[0056] Regarding the proportional valve 152, it is used to regulate the flow rate of compressed gas flowing through the pressure bottle. The liquid supply system is configured to adjust the opening degree of the proportional valve based on the air pressure at the proportional valve, so as to adjust the hydraulic pressure on the main liquid supply pipeline by adjusting the air pressure in the pressure bottle.

[0057] The proportional valve 152 includes a port 1 and a port 2. The port 1 is communicated with the compressed gas source, and the port 2 is communicated with the safety bottle 150. When the proportional valve 152 is opened, the compressed gas flows in from the port 1 of the proportional valve 152, and after passing through the internal control of the proportional valve 152, the gas with the target pressure is output from the port 2. When the proportional valve 152 is closed, the internal control of the proportional valve 152 is closed, and the port 2 of the proportional valve 152 is communicated with the atmosphere.

[0058] In some embodiments, a pneumatic pressure detection device is arranged at the proportional valve 152. The present disclosure adjusts the opening degree of the proportional valve based on the detection data (i.e., the air pressure value) of the pneumatic pressure detection device at the proportional valve 152, so as to adjust the hydraulic pressure in the pressure bottle. For example, the pneumatic pressure detection device at the proportional valve can detect the fluctuation of the air pressure. If it detects that the air pressure at the proportional valve becomes larger, the output value of the proportional valve is adjusted to be smaller; if it detects that the air pressure at the proportional valve becomes smaller, the output value of the proportional valve is adjusted to be larger, so as to keep the air pressure in the pressure bottle in a steady state, so that the hydraulic pressure in the pressure bottle is in a stable state. Therefore, in the case of constant flow liquid supply, the hydraulic pressure and flow rate of the liquid to be sprayed in the main liquid supply pipeline are also stable. In addition, the proportional valve can respond quickly and highly accurately in the control of gas. Therefore, even if the system is in an unstable state, the proportional valve can quickly adjust to make the system recover from the unstable state to the stable state more quickly.

[0059] Regarding the safety bottle 150, one end thereof is connected to the gas source containing compressed gas via the proportional valve 152. The other end of the safety bottle 150 is connected to the interaction port 148 of the pressure bottle 140.

[0060] In the above solution, by connecting one end of the safety bottle to the compressed gas via the proportional valve, and connecting the other end of the safety bottle to the pressure bottle for gas communication, and connecting the pressure bottle to the main liquid supply pipeline via the third solenoid valve, the hydraulic pressure on the main liquid supply pipeline is adjusted by adjusting the air pressure in the pressure bottle. The liquid supply system of the present disclosure adjusts the hydraulic pressure and flow rate on the main liquid supply pipeline by adjusting the air pressure in the pressure bottle, avoiding the problem of large inertia caused by adjusting the hydraulic pressure and flow rate on the main liquid supply pipeline by adjusting the rotation speed of the first liquid supply pump, and can quickly make the system recover from the unstable state to the stable state. And it can also avoid the inertia that is easy to cause the liquid supply pulse fluctuation of the nozzle. Therefore, when the system encounters an unstable state, the present disclosure can quickly recover to the stable state and can significantly improve the spraying quality.

[0061] Regarding the first liquid supply pump 122, it is arranged on the main liquid supply pipeline and is used to pump the liquid to be sprayed in the main liquid supply pipeline, or cleaning liquid (the cleaning liquid is, for example but not limited to, deionized water), etc. The first liquid supply pump 122 is arranged between the first solenoid valve 120 and the fourth solenoid valve 124.

[0062] Regarding the control device 102, it is used to obtain the hydraulic detection data detected by the hydraulic detection device 128, and to turn on or off the power supply of the solenoid valve, proportional valve 152, and the first liquid supply pump 122. In some embodiments, the control device 102 is further used to obtain the flow rate detected by the flow rate detection device 126 and the moving speed data of the target object detected by the moving speed sensor (such as an encoder). It should be understood that the control device 102 can interact with the hydraulic detection device 128, flow rate detection device 126, moving speed sensor, solenoid valve, proportional valve, and the first liquid supply pump in a wired or wireless manner for signal or data interaction.

[0063] Regarding the fourth solenoid valve 124, it is arranged on the main liquid supply pipeline and is configured to be in parallel with the pressure bottle. For example, as Figure 1 shown, the fourth solenoid valve 124 is arranged on the main liquid supply pipeline. One end of the fourth solenoid valve 124 is connected to the output end of the one-way valve 144, and the other end of the fourth solenoid valve 124 is connected to the third solenoid valve 142.

[0064] Regarding the fifth solenoid valve 154, it is arranged between the liquid output end of the safety bottle 150 and the waste liquid container.

[0065] Regarding the first coupling device 112, it is, for example, configured to realize the connection and disconnection between the input side pipeline of the first solenoid valve 120 (or one end of the main liquid supply pipeline) and the output channel of the ink supply unit 110.

[0066] Regarding the second coupling device 114, it is, for example, configured to realize the connection and disconnection between the input channel of the ink supply unit 110 and the first three-way solenoid valve 172. In some embodiments, the first coupling device 112 and the second coupling device 114 are, for example, quick connectors, such as but not limited to quick plug-in connectors for hoses. When the spraying of the liquid to be sprayed of one color is completed and the system needs to clean the liquid supply pipeline and the nozzle, after the cleaning is completed, the ink supply unit 110 of the current color can be disconnected via the quick connector, and the ink supply unit 110 containing the liquid to be sprayed of the next color can be connected to the main liquid supply pipeline via the quick connector. By using the first coupling device 112 and the second coupling device 114 to realize the connection and disconnection of the ink supply unit 110, the present disclosure can achieve rapid replacement of the liquid supply unit containing the liquid to be sprayed (for example, rapid ink replacement).

[0067] In some embodiments, the liquid supply system further includes: a moisturizing liquid container 180 and a second solenoid valve 182.

[0068] Regarding the moisturizing liquid container 180, it is configured to hold, for example, a moisturizing liquid.

[0069] Regarding the second solenoid valve 182, it is, for example, disposed between the moisturizing liquid container 180 and the main liquid supply pipe 130, and is configured to supply the moisturizing liquid held in the moisturizing liquid container 180 to the main liquid supply pipe 130 when the power supply to the second solenoid valve 182 is turned on. For example, if the control device 102 detects a shutdown moisturizing instruction, the power supply to the second solenoid valve 182 is turned on so that the moisturizing liquid container 180 communicates with the main liquid supply line 130; the power supplies to the first liquid supply pump 122, the fourth solenoid valve 124, and the sixth solenoid valve 132 are turned on, and the power supplies to other valves (such as the third solenoid valve 142 and the seventh solenoid valve 168) and pumps (such as the fourth liquid supply pump 192) are turned off, so that the moisturizing liquid from the moisturizing liquid container 180 fills the main liquid supply line 130 and the nozzle 160; then, the control device 102 determines whether a sixth predetermined time interval has been reached; and if the control device 102 determines that the sixth predetermined time interval has been reached, the power supplies to the fourth solenoid valve 124 and the sixth solenoid valve 132 are turned off. By adopting the above means, the present disclosure can achieve moisturizing of the nozzle.

[0070] In some embodiments, the liquid supply system further includes: a cleaning liquid container 170, a flushing nozzle 190, an eighth solenoid valve 194, a fourth liquid supply pump 192, and a ninth solenoid valve 196.

[0071] Regarding liquid supply pumps, such as the first liquid supply pump 122 and the fourth liquid supply pump 192, etc., they include a port 1 and a port 2. When the liquid supply pump rotates forward, the liquid supply pump draws liquid from its port 1 and discharges the liquid from its port 2; when the liquid supply pump rotates in reverse, the liquid supply pump draws liquid from its port 2 and discharges the liquid from its port 1.

[0072] Regarding solenoid valves, such as the first solenoid valve 120, the second solenoid valve 182, the third solenoid valve 142, the fourth solenoid valve 124, the fifth solenoid valve 154, the sixth solenoid valve 132, the seventh solenoid valve 168, the eighth solenoid valve 194, the ninth solenoid valve 196, etc., when the solenoid valve is opened, the passage inside the solenoid valve is opened, and liquid can flow from the liquid inlet end of the solenoid valve to the liquid outlet end; when the solenoid valve is closed, the passage inside the solenoid valve is closed, and liquid cannot flow from the liquid inlet end of the solenoid valve to the liquid outlet end.

[0073] Regarding the cleaning liquid container 170, it is used to hold the cleaning liquid. In some embodiments, the cleaning liquid in the cleaning liquid container 170 is used to clean the main liquid supply pipeline, the nozzle, and the pressure bottle. The cleaning liquid in the cleaning liquid container 170 is also used to clean the surface of the nozzle. For example, if the control device 102 detects a nozzle surface flushing instruction, the power supplies of the eighth solenoid valve 194 and the fourth liquid supply pump 192 are turned on so as to supply the cleaning liquid from the cleaning liquid container 170 to the input channel 198 of the flushing nozzle 160. The eighth solenoid valve 194 and the fourth liquid supply pump 192 are connected between the cleaning liquid container and the input channel 198 of the flushing nozzle 160; the flushing nozzle 160 is controlled to move from one end of the nozzle 160 to the other end along the extending direction of the nozzle 160 so as to spray the cleaning liquid output from the nozzle of the flushing nozzle 190 onto the surface of the nozzle, thereby cleaning the liquid to be sprayed on the surface of the nozzle; the power supply of the ninth solenoid valve 196 is turned on, and the power supplies of the eighth solenoid valve 194 and the fourth liquid supply pump 190 are turned off so as to supply compressed air to the input channel 198 of the flushing nozzle 190 via the ninth solenoid valve 196; and the flushing nozzle 190 is controlled to move from one end of the nozzle 160 to the other end along the extending direction of the nozzle 160 so as to blow dry the cleaning liquid on the surface of the nozzle with the air output from the nozzle of the flushing nozzle 190. The method 800 for flushing the surface of the nozzle will be described in detail below in conjunction with Figure 8 and will not be elaborated here.

[0074] As Figure 1 shown, the output end of the cleaning liquid container 170 is connected to the NO port of the first three-way solenoid valve 172. The COM port of the first three-way solenoid valve 172 is connected to the NC port of the first three-way solenoid valve 116 via the second coupling device 114. When the power supply of the first three-way solenoid valve 172 is disconnected and the power supply of the second three-way solenoid valve 116 is turned on, the cleaning liquid in the cleaning liquid container 170 is supplied to the first solenoid valve 120.

[0075] As Figure 1 shown in the lower left corner, the cleaning liquid (such as the cleaning liquid from the cleaning liquid container 170) is also supplied to the cleaning liquid pipeline 194.

[0076] Regarding the fourth liquid supply pump 192, it is configured on the cleaning liquid pipeline 194. The input end of the fourth liquid supply pump 192 is connected to the cleaning liquid container (such as but not limited to the cleaning liquid container 170), and the output end of the fourth liquid supply pump 192 is connected to the eighth solenoid valve 194.

[0077] Regarding the eighth solenoid valve 194, it is configured on the cleaning liquid pipeline 194, and the eighth solenoid valve 194 is configured to supply the cleaning liquid output by the fourth liquid supply pump 192 to the input channel 198 of the flushing nozzle 190 when the power supply of the eighth solenoid valve 194 is turned on.

[0078] Regarding the ninth solenoid valve 196, it is configured on the air pipeline 195, and the ninth solenoid valve 196 is configured to supply compressed air from the air pipeline 195 to the input channel 198 of the flushing nozzle 190 when the power supply of the ninth solenoid valve 195 is turned on.

[0079] Regarding the flushing nozzle 190, it includes a nozzle and an input channel 198. As Figure 1 shown, the input channels 198 of the flushing nozzle 190 are respectively in communication with the cleaning liquid pipeline 194 and the air pipeline 195. The flushing nozzle 190 is configured to spray the cleaning liquid or compressed gas input from the input channel 198 via the nozzle based on the nozzle surface flushing instruction, and move from one end of the nozzle to the other end along the extending direction of the nozzle.

[0080] In some embodiments, the liquid supply system further includes: a waste liquid container 186 and a seventh solenoid valve 168.

[0081] Regarding the waste liquid container 186, it is configured to hold waste liquid. The waste liquid is, for example, the cleaning liquid for cleaning the liquid supply pipeline.

[0082] Regarding the seventh solenoid valve 168, it is configured between the waste liquid container 186 and the liquid outlet 164 of the nozzle 160. When the power supply of the seventh solenoid valve 168 is turned on, the waste liquid output from the liquid outlet 164 of the nozzle 160 flows into the waste liquid container.

[0083] Figure 10 The schematic diagram of the spraying system 1000 according to the embodiment of the present disclosure is shown. The spraying system 1000 includes, for example, a liquid supply system and one or more nozzles 160. Figure 10 Only one nozzle 160 is schematically shown therein. Among them, the liquid supply system is used to supply the liquid to be sprayed to the nozzle 160. The nozzle 160 is used to output the liquid to be sprayed to a target object (not shown, such as a substrate like fabric, etc.). In some embodiments, the spraying system 1000 includes, for example, a plurality of nozzles 160, and the resolutions of the plurality of nozzles 160 can be the same or different.

[0084] Regarding each nozzle 160, it at least includes: a capillary group 166 and a flow channel ( Figure 10 not shown therein). The capillary group 166 is used to output the liquid to be sprayed. The flow channel is used to supply the liquid to be sprayed from the liquid supply system to each capillary in the capillary group 166. The flow channel is in communication with the liquid inlet 162 and the liquid outlet 164.

[0085] Regarding the liquid supply system, it at least includes: a liquid supply unit 110, a main liquid supply pipeline 130, a pressure bottle 140, a safety bottle 150. In some embodiments, the liquid supply system further includes a control device 102.

[0086] Regarding the liquid supply unit 110, it is at least used to hold the liquid to be sprayed. The liquid supply unit 110 is communicated with the first interface 143 of the pressure bottle 140 via the first liquid supply pump 122, and the second interface 145 of the pressure bottle 140 is communicated with the main liquid supply pipeline 130. Therefore, the liquid to be sprayed in the liquid supply unit 110 can be provided to the main liquid supply pipeline 130 via the first liquid supply pump 122. In some embodiments, the liquid supply unit 110 is connected to the first liquid supply pump 122 through the first coupling device. Thus, the present disclosure can conveniently replace the liquid supply unit.

[0087] Regarding the main liquid supply pipeline 130, it is used to convey the liquid to be sprayed to the nozzle 160. The main liquid supply pipeline 130 is communicated with the liquid inlet 162 of the nozzle 160. For example, one end of the main liquid supply pipeline 130 is communicated with the liquid supply unit 110 through the first coupling device. The other end of the main liquid supply pipeline 130 is communicated with the liquid inlet 162 of the nozzle 160. At least a first solenoid valve 120, an eighth solenoid valve 151, a first liquid supply pump 122, a flow meter 126, a hydraulic detection device 128, and a four-way valve 121 are arranged on the main liquid supply pipeline 130.

[0088] Regarding the pressure bottle 140, it is configured with a first interface 143, a second interface 135, an interaction port 148, and a stirrer 146. The first interface 143 of the pressure bottle 140 is connected to the main liquid supply pipeline 130 via the eighth solenoid valve 151, and the second interface 145 of the pressure bottle 140 is communicated with the main liquid supply pipeline 130.

[0089] In some embodiments, a liquid level detection device is configured in the pressure bottle 140. The liquid level detection device includes, for example, a first liquid level gauge 141, a second liquid level gauge 147, and a third liquid level gauge 149. The liquid level detection device is used to detect multiple liquid level positions such as the high position, the middle position, and the low position of the liquid level in the pressure bottle 140. So as to keep the liquid level in the pressure bottle 140 fluctuating within a predetermined range from the middle position. Thus, the present disclosure can reduce the fluctuation of the liquid level. For example, in the steady-state working condition, the fluctuation range of the flow rate of the present disclosure fluctuates within the range of -1% to 1% of the total flow rate. In addition, the present disclosure also makes the liquid level in the pressure bottle 140 lower than the high position to prevent the liquid in the pressure bottle 140 from entering the safety bottle 150 through the interaction port.

[0090] For example, during the process of the liquid supply unit 110 conveying the liquid to be sprayed into the pressure bottle 140, the liquid level in the pressure bottle 140 rises. When the third liquid level gauge 149 detects the liquid to be sprayed, it indicates that the liquid level in the pressure bottle 140 reaches the low position. As the liquid level in the pressure bottle 140 further rises, when the second liquid level gauge 147 detects the liquid to be sprayed, it indicates that the liquid level in the pressure bottle 140 reaches the middle position. When the first liquid level gauge 141 detects the liquid to be sprayed, it indicates that the liquid level in the pressure bottle 140 reaches the high position.

[0091] For example, the control device 102 can control the rotation speed of the first liquid supply pump 122 according to the liquid level information detected by the liquid level detection device, so as to control the liquid level in the pressure bottle 140 within a liquid level range that matches the target liquid level. The liquid level range that matches the target liquid level is, for example, a liquid level range that deviates from the target liquid level by no more than a predetermined threshold. The predetermined threshold is, for example, 5%. It should be understood that this is only an example here, and the predetermined threshold can be reasonably set according to specific requirements. For example, taking the intermediate position corresponding to the second liquid level gauge 147 as the target liquid level, when the liquid level in the pressure bottle 140 is lower than the target liquid level (for example, when the first liquid level gauge 141, the second liquid level gauge 147, and the third liquid level gauge 149 do not detect the liquid to be sprayed), the control device 102 can control the first liquid supply pump 122 to increase the rotation speed; when the liquid level in the pressure bottle 140 is higher than the target liquid level (for example, when the first liquid level gauge 141 detects the liquid to be sprayed), the control device 102 can control the first liquid supply pump 122 to decrease the rotation speed. In this way, the liquid level in the pressure bottle 140 can be stabilized within a liquid level range that matches the target liquid level. Figure 11 It shows a sampling schematic diagram of the flow rate of the liquid to be sprayed corresponding to this liquid level control method in the embodiment of the present disclosure. Among them, the horizontal axis represents the sampling time, and the vertical axis represents the flow rate of the liquid to be sprayed (the unit is, for example, "milliliters per minute"), and this flow rate of the liquid to be sprayed is based on the flow rate detection data detected by the flow meter 126 on the main liquid supply pipeline 130. It should be noted that based on this liquid level control method, the flow rate of the liquid to be sprayed in the main liquid supply pipeline 130 (that is, the flow rate of the liquid to be sprayed at the nozzle 160) shows a periodic sawtooth-like change pattern.

[0092] In some embodiments, the pressure bottle 140 is further equipped with a pressure detection device 161, which is arranged below the pressure bottle and is configured to detect the pressure exerted by the pressure bottle 140 on the pressure detection device 161. The control device 102 is further configured to control the first liquid supply pump according to the liquid level detected by the liquid level detection device and the pressure detected by the pressure detection device 161, so as to control the liquid level in the pressure bottle. The pressure detection device 161 is, for example, a pressure sensor. The pressure detection device 161 is, for example, a gravity sensor, and the pressure exerted by the pressure bottle 140 on the pressure detection device 161 detected by the pressure detection device 161 is related to the sum of the weight of the pressure bottle 140 and the liquid to be sprayed contained in the pressure bottle 140. For example, under the influence of other external forces, the pressure exerted by the pressure bottle 140 on the pressure detection device 161 detected by the pressure detection device 161 corresponds to the sum of the weight of the pressure bottle 140 and the liquid to be sprayed contained in the pressure bottle 140.

[0093] In some embodiments, the control device 102 is further configured to determine that when the liquid level detected by the liquid level detection device corresponds to the target liquid level, the pressure detected by the pressure detection device is the target liquid level pressure, and adjust the first liquid supply pump according to the pressure detected by the pressure detection device and the target liquid level pressure, so as to make the liquid level in the pressure bottle match the target liquid level.

[0094] For example, the control device 102 closes the proportional valve 152, the fifth solenoid valve 154, and the four-way valve 121. The control device 102 starts the first liquid supply pump 122 and makes it rotate forward (it should be understood that these valve devices and pump devices are in the closed state by default). The liquid supply unit 110 conveys the liquid to be sprayed into the pressure bottle 140. During the process of the liquid supply unit 110 conveying the liquid to be sprayed into the pressure bottle 140, the liquid level in the pressure bottle 140 rises. When the third liquid level gauge 149 detects the liquid to be sprayed, it indicates that the liquid level in the pressure bottle 140 reaches the low position. As the liquid level in the pressure bottle 140 further rises, when the second liquid level gauge 147 detects the liquid to be sprayed, it indicates that the liquid level in the pressure bottle 140 reaches the intermediate position (this intermediate position is, for example, used as the target liquid level). At this time, the control device 102 obtains the pressure applied by the pressure bottle 140 to the pressure detection device 161 detected by the pressure detection device 161, and takes this pressure value as the target liquid level pressure. It should be understood that the target liquid level pressure is the sum of the weights of the pressure bottle 140 and the liquid to be sprayed contained in the pressure bottle 140 when the liquid level in the pressure bottle 140 corresponds to the target liquid level. Then, the control device 102 takes this target liquid level pressure as the target of adjustment, and based on the real-time pressure value of the pressure applied by the pressure bottle 140 to the pressure detection device 161 detected by the pressure detection device 161, adjusts the rotation speed of the first liquid supply pump 122 based on the PID algorithm, so that the real-time pressure applied by the pressure bottle 140 to the pressure detection device 161 matches the target liquid level pressure. Thus, the liquid level in the pressure bottle 140 matches the target liquid level. That is, according to the magnitude relationship between the real-time value of the sum of the weights of the pressure bottle 140 and the liquid to be sprayed contained in the pressure bottle 140 detected by the pressure detection device 161 and the target liquid level pressure, the rotation speed of the first liquid supply pump 122 is adjusted, so that the real-time value of the sum of the weights of the pressure bottle 140 and the liquid to be sprayed contained in the pressure bottle 140 detected by the pressure detection device 161 matches the target liquid level pressure, thereby making the liquid level in the pressure bottle 140 match the target liquid level.

[0095] Specifically, when the real-time pressure value exerted by the pressure bottle 140 on the pressure detection device 161 detected by the pressure detection device 161 is higher than the target liquid level pressure, the control device 102 reduces the rotation speed of the first liquid supply pump 122; when the real-time pressure value exerted by the pressure bottle 140 on the pressure detection device 161 detected by the pressure detection device 161 is lower than the target liquid level pressure, the control device 102 increases the rotation speed of the first liquid supply pump 122.

[0096] Figure 12 The figure shows a sampling schematic diagram of the flow rate of the liquid to be sprayed corresponding to this liquid level control method according to an embodiment of the present disclosure. Among them, the horizontal axis represents the sampling time, and the vertical axis represents the flow rate of the liquid to be sprayed (the unit is, for example, "milliliters per minute"). This flow rate of the liquid to be sprayed is based on the flow rate detection data detected by the flow meter 126 on the main liquid supply pipeline 130. It should be noted that based on this liquid level control method, compared with the previous liquid level control method, the periodic sawtooth-like change of the flow rate of the liquid to be sprayed in the main liquid supply pipeline 130 (that is, the flow rate of the liquid to be sprayed at the nozzle 160) is eliminated.

[0097] Regarding the proportional valve 152, it is used to adjust the flow rate of the compressed gas flowing through the pressure bottle 150. The liquid supply system is configured to adjust the opening degree of the proportional valve based on the air pressure at the proportional valve, so as to adjust the hydraulic pressure on the main liquid supply pipeline by adjusting the air pressure in the pressure bottle.

[0098] The proportional valve 152 includes a port 1 and a port 2. The port 1 is communicated with the compressed gas source, and the port 2 is communicated with the safety bottle 150. When the proportional valve 152 is opened, the compressed gas flows in from the port 1 of the proportional valve 152 and is output from the port 2 with a target pressure through the internal control of the proportional valve 152. When the proportional valve 152 is closed, the internal control of the proportional valve 152 is closed, and the port 2 of the proportional valve 152 is communicated with the atmosphere.

[0099] In some embodiments, a pneumatic pressure detection device is arranged at the proportional valve 152. The present disclosure adjusts the opening degree of the proportional valve based on the detection data (that is, the air pressure value) of the pneumatic pressure detection device at the proportional valve 152, so as to adjust the hydraulic pressure in the pressure bottle. For example, the pneumatic pressure detection device at the proportional valve can detect the fluctuation of the air pressure. If it detects that the air pressure at the proportional valve becomes larger, the output value of the proportional valve is adjusted to be smaller; if it detects that the air pressure at the proportional valve becomes smaller, the output value of the proportional valve is adjusted to be larger, so as to keep the air pressure in the pressure bottle in a steady state, so that the hydraulic pressure in the pressure bottle is in a stable state. Therefore, in the case of constant flow liquid supply, the hydraulic pressure and flow rate of the liquid to be sprayed in the main liquid supply pipeline are also stable. In addition, the proportional valve can respond quickly and highly accurately in the control of gas. Therefore, even if the system is in an unstable state, the proportional valve can quickly adjust to make the system recover from the unstable state to the stable state more quickly.

[0100] Regarding the safety bottle 150, one end thereof is connected to a gas source containing compressed gas via a proportional valve 152. The other end of the safety bottle 150 is connected to the interaction port 148 of the pressure bottle 140.

[0101] In the above solution, by making one end of the safety bottle communicate with the compressed gas via a proportional valve, and the other end of the safety bottle communicate with the pressure bottle, and the pressure bottle communicate with the main liquid supply pipeline via a third electromagnetic valve, the hydraulic pressure on the main liquid supply pipeline is adjusted by adjusting the air pressure of the pressure bottle. The liquid supply system of the present disclosure adjusts the hydraulic pressure and flow rate on the main liquid supply pipeline by adjusting the air pressure of the pressure bottle, avoiding the problem of large inertia caused by adjusting the hydraulic pressure and flow rate on the main liquid supply pipeline by the rotation speed of the first liquid supply pump, and can quickly make the system quickly recover from an unstable state to a stable state. And it can avoid the inertia from easily causing the liquid supply pulse fluctuation of the nozzle. Therefore, when the system of the present disclosure encounters an unstable state, it can quickly recover to a stable state and can significantly improve the spraying quality.

[0102] Regarding the first liquid supply pump 122, it is arranged on the main liquid supply pipeline 130 and is used for pumping the liquid to be sprayed or cleaning liquid (such as but not limited to deionized water) in the main liquid supply pipeline 130. The first liquid supply pump 122 is arranged between the eighth electromagnetic valve 151 and the liquid supply unit 110.

[0103] Regarding the control device 102, it is used to obtain the hydraulic pressure detection data detected by the hydraulic pressure detection device 128, and to turn on or off the power supply of pump devices such as electromagnetic valves, proportional valve 152, and the first liquid supply pump 122. In some embodiments, the control device 102 is further used to obtain the flow rate detected by the flow rate detection device 126 and the moving speed data of the target object detected by a moving speed sensor (such as an encoder). It should be understood that the control device 102 can interact with signals or data with the hydraulic pressure detection device 128, the flow rate detection device 126, the moving speed sensor, electromagnetic valves, proportional valves, the first liquid supply pump and other pump devices in a wired or wireless manner.

[0104] Regarding the fifth electromagnetic valve 154, it is arranged between the liquid output end of the safety bottle 150 and the waste liquid container.

[0105] Regarding the first coupling device, it is configured, for example, to realize the connection and disconnection between the input side pipeline of the first liquid supply pump 122 (or one end of the main liquid supply pipeline) and the output channel of the ink supply unit 110. By adopting the first coupling device, the connection and disconnection of the ink supply unit 110 can be realized, and the present disclosure can realize the quick replacement of the liquid supply unit containing the liquid to be sprayed (for example, can realize quick ink replacement).

[0106] In some embodiments, the liquid supply system further includes: a moisturizing liquid container 180 and a third liquid supply pump 181.

[0107] Regarding the moisturizing liquid container 180, it is configured to hold, for example, a moisturizing liquid. The moisturizing liquid container 180 is connected to the fourth interface (e.g., the 4th interface) of the four-way valve 121 via the third liquid supply pump 181.

[0108] In some embodiments, the liquid supply system further includes: a cleaning liquid container 170 and a second liquid supply pump 171.

[0109] Regarding the cleaning liquid container 170, it is used to hold a cleaning liquid. In some embodiments, the cleaning liquid in the cleaning liquid container 170 is used to clean the main liquid supply pipeline 130, the nozzle 160, and the pressure bottle 140.

[0110] For example, when the control device 102 detects a cleaning nozzle instruction, the control device 102 controls the solenoid valve assembly (e.g., the four-way valve 121) to make the second interface (e.g., the 2nd interface) and the third interface (e.g., the 3rd interface) of the solenoid valve assembly communicate with each other, and turns on the power supply of the stirrer configured for the pressure bottle 140. Then, the control device 102 makes the second liquid supply pump 171 rotate forward so that the cleaning liquid enters the nozzle 160 to clean the nozzle 10.

[0111] For example, when the control device 102 detects a cleaning pipeline instruction, the control device 102 controls the solenoid valve assembly (e.g., the four-way valve 121) to make the second interface (e.g., the 2nd interface) and the first interface (e.g., the 1st interface) of the solenoid valve assembly communicate with each other, and disconnects the power supply of the eighth solenoid valve 151. The eighth solenoid valve 151 is connected between the first liquid supply pump 122 and the first interface 143 of the pressure bottle 140. Then, the control device 102 makes the second liquid supply pump 171 rotate forward so that the cleaning liquid in the cleaning liquid container 170 enters the main liquid supply pipeline 130 and the pressure bottle 140. Then, in response to detecting the liquid level maximum value signal of the pressure bottle 140, the control device 102 controls the solenoid valve assembly (e.g., the four-way valve 121) to disconnect the second interface (e.g., the 2nd interface) and the first interface (e.g., the 1st interface), disconnects the power supply of the second liquid supply pump 171, and makes the stirrer 146 stir. In some embodiments, the liquid level maximum value is used to indicate that the pressure bottle 140 is full. In some embodiments, the liquid level maximum value is used to indicate the liquid level required for cleaning the pressure bottle 140. In some embodiments, the liquid level maximum value corresponds to, for example, the first liquid level gauge 141.

[0112] Then, in response to determining that the fourth predetermined time interval has been reached, the control device 102 turns off the power supply of the stirrer. For example, after the stirring time corresponding to the fourth predetermined time interval arrives, the power supply of the stirrer 146 is turned off to stop stirring.

[0113] Then, the control device 102 turns on the power supply of the eighth solenoid valve 151 and reverses the first liquid supply pump 122 to discharge the cleaned cleaning liquid from the pressure bottle 140.

[0114] According to the spraying system 1000, the nozzle 160 and the pressure bottle 140 can be cleaned separately. When cleaning the nozzle 160, an appropriate flow rate and cleaning pressure can be set through the second liquid supply pump 171. Moreover, the cleaning liquid directly enters the nozzle 160 without flowing through the pressure bottle 140, which can avoid the problem that the nozzle 160 is blocked due to possible impurities in the pressure bottle 140.

[0115] In some embodiments, the liquid supply system 200 further includes a waste liquid container 186 and a seventh solenoid valve 168.

[0116] Regarding the waste liquid container 186, it is configured to hold waste liquid. The waste liquid is, for example, the cleaning liquid that has cleaned the nozzle 160.

[0117] Regarding the seventh solenoid valve 168, it is configured between the waste liquid container 186 and the liquid outlet 164 of the nozzle 160. When the power supply of the seventh solenoid valve 168 is turned on, the waste liquid output from the liquid outlet 164 of the nozzle 160 flows into the waste liquid container.

[0118] Figure 13 The flowchart of a method 1300 for controlling a liquid supply system according to an embodiment of the present disclosure is shown. It should be understood that the method 1300 can be executed, for example, at the control device 102 or at Figure 9 the described electronic device 900. The method 1300 can be implemented, for example, based on the liquid supply system 100 or based on the liquid supply system 200. It should be understood that the method 1300 may further include additional actions not shown and / or may omit the shown actions, and the scope of the present disclosure is not limited in this regard.

[0119] It should be understood that for a traditional liquid supply system, when it is required to reach a predetermined liquid supply flow rate (for example, 1 liter / minute), usually the flow rate slowly rises to reach the predetermined liquid supply flow rate, that is, the startup is slow. However, the method 1300 of the present disclosure can achieve a fast startup.

[0120] At step 1302, if the control device 102 detects a start spraying instruction, it turns on the power supply of the first liquid supply pump and the proportional valve so that the liquid to be sprayed in the liquid supply unit flows through the pressure bottle.

[0121] At step 1304, the control device 102 adjusts the rotation speed of the first liquid supply pump based on the obtained liquid level data in the pressure bottle.

[0122] At step 1306, the control device 102 determines whether the hydraulic detection data on the main liquid supply pipeline is greater than or equal to a predetermined hydraulic threshold value.

[0123] At step 1308, if the control device 102 determines that the hydraulic detection data on the main liquid supply pipeline is greater than or equal to the predetermined hydraulic threshold value, it controls the solenoid valve assembly so that the liquid to be sprayed enters the liquid inlet of the spray head.

[0124] At step 1310, the control device 102 adjusts the opening degree of the proportional valve so that the liquid to be sprayed supplied to the spray head reaches a predetermined flow rate.

[0125] Figure 2 The flowchart of a method 200 for controlling a liquid supply system according to an embodiment of the present disclosure is shown. It should be understood that the method 200 can be executed, for example, at the control device 102, or can also be executed at Figure 9 the described electronic device 900. It should be understood that the method 200 may further include additional actions not shown and / or may omit the shown actions, and the scope of the present disclosure is not limited in this regard.

[0126] It should be understood that for a traditional liquid supply system, when it is required to reach a predetermined liquid supply flow rate (for example, 1 liter / minute), usually the flow rate slowly rises to reach this predetermined liquid supply flow rate, that is, the start is slow. However, the method 200 of the present disclosure can achieve a fast start.

[0127] At step 202, if the control device 102 detects a start spraying instruction, it turns on the power supply of the first solenoid valve, the first liquid supply pump, the third solenoid valve, and the proportional valve, so that the liquid to be sprayed in the liquid supply unit flows through the pressure bottle, and the proportional valve is arranged between one end of the safety bottle and the gas source of the compressed gas.

[0128] For example, if the control device 102 detects a start spraying instruction, at this time the power supply of the sixth solenoid valve 132 is disconnected, the power supply of the first solenoid valve 120, the first liquid supply pump 122, the third solenoid valve 142, and the proportional valve 152 is turned on, and the power supplies of other valves and pumps are turned off. As mentioned above, the gas source containing compressed gas is connected to the first end of the proportional valve. When the power supply of the proportional valve 152 is turned on, the higher air pressure causes the liquid level in the pressure bottle to rise rapidly.

[0129] At step 204, the control device 102 adjusts the rotation speed of the first liquid supply pump based on the obtained liquid level data in the pressure bottle.

[0130] At step 206, the control device 102 determines whether the hydraulic detection data on the main liquid supply pipeline is greater than or equal to a predetermined hydraulic threshold value.

[0131] At step 208, if the control device 102 determines that the hydraulic detection data on the main liquid supply line is greater than or equal to a predetermined hydraulic threshold, power supply to the sixth solenoid valve is turned on so that the liquid to be sprayed enters the liquid inlet of the nozzle via the sixth solenoid valve.

[0132] For example, if the control device 102 determines that the hydraulic detection data detected by the hydraulic detection device 128 on the main liquid supply line 130 is greater than or equal to a predetermined hydraulic threshold, power supply to the sixth solenoid valve 132 is turned on, enabling a rapid attainment of a predetermined liquid supply flow rate, and thereby enabling the capillary of the nozzle to rapidly output a liquid column.

[0133] At step 210, the opening degree of the proportional valve is adjusted so that the liquid to be sprayed supplied to the nozzle reaches a predetermined flow rate.

[0134] For example, while power supply to the sixth solenoid valve 132 is turned on, the opening degree of the proportional valve is adjusted based on the air pressure at the proportional valve, so that the hydraulic pressure and flow rate on the main liquid supply line are adjusted by adjusting the air pressure in the pressure bottle.

[0135] It should be understood that the flow resistance of the liquid supply line and the flow resistance of the nozzle are both fixed. Therefore, the hydraulic pressure corresponds to the flow rate of the liquid to be sprayed. Regarding the method of adjusting the proportional valve, it includes, for example: determining the target hydraulic pressure corresponding to the predetermined flow rate; calculating a hydraulic compensation value based on the hydraulic detection data and the determined target hydraulic pressure; calculating a target air pressure value based on the hydraulic compensation value, and adjusting the opening degree of the proportional valve based on the difference between the air pressure detection data at the proportional valve and the calculated target air pressure value until the hydraulic detection data indicates stability at the target hydraulic pressure.

[0136] In the above solution, by adjusting the proportional valve to change the air pressure in the pressure bottle, and thereby adjusting the hydraulic pressure and flow rate on the main liquid supply line, the problem of large inertia caused by adjusting the hydraulic pressure and flow rate on the main liquid supply line by adjusting the rotational speed of the first liquid supply pump is avoided, and the system can quickly recover from an unstable state to a stable state. Additionally, by turning on the power supply to the sixth solenoid valve only when the hydraulic detection data on the main liquid supply line is greater than or equal to the hydraulic threshold, the present disclosure can quickly bring the flow rate of the liquid supply line and the nozzle to the target value.

[0137] Figure 3 A flowchart of a method 300 for providing a liquid to be sprayed according to an embodiment of the present disclosure is shown. It should be understood that method 300 can be executed, for example, at the control device 102, or can also be executed at Figure 9 the described electronic device 900. It should be understood that method 300 may further include additional actions not shown and / or may omit the shown actions, and the scope of the present disclosure is not limited in this regard.

[0138] At step 302, if the control device 102 detects a command to provide the liquid to be sprayed, the power supplies of the first solenoid valve, the third solenoid valve, the fourth solenoid valve, the sixth solenoid valve, the seventh solenoid valve, and the first liquid supply pump are turned on so that the liquid to be sprayed fills the main liquid supply pipeline, the nozzle, and the pressure bottle.

[0139] As Figure 1 shown, the COM port of the second three-way solenoid valve 116 is connected to the first solenoid valve 120 via the first coupling device 112. The NO port of the second three-way solenoid valve 116 is connected to one end of the suction pipeline 115 of the ink supply unit 110, and the other end of the suction pipeline 115 is located below the liquid level of the liquid to be sprayed contained in the ink supply unit 110. When the second three-way solenoid valve 116 is not powered, the COM port and the NO port of the second three-way solenoid valve 116 are connected, and thus connected to the suction pipeline 115.

[0140] If a command to provide the liquid to be sprayed is detected, the power supplies of the first solenoid valve 120, the third solenoid valve 142, the fourth solenoid valve 124, the sixth solenoid valve 132, the seventh solenoid valve 168, and the first liquid supply pump 122 are turned on, and the liquid to be sprayed contained in the ink supply unit 110 is respectively provided to the main liquid supply pipeline 130, the nozzle 160, and the pressure bottle 140.

[0141] At step 304, if the control device 102 determines that the seventh predetermined time interval has been reached, the power supplies of the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve are turned off.

[0142] For example, if the seventh predetermined time interval is reached, the fourth solenoid valve 124, the sixth solenoid valve 132, and the seventh solenoid valve 168 are turned off, and the on / off states of other devices remain unchanged. At this time, the liquid to be sprayed is provided to the pressure bottle 140 through the first solenoid valve 120, the third solenoid valve 142, and the first liquid supply pump 122.

[0143] At step 306, if the control device 102 detects liquid level data indicating that the liquid level in the pressure bottle has reached a predetermined intermediate position, the power supplies of the third solenoid valve and the first liquid supply pump are turned off.

[0144] For example, if it is detected that the pressure bottle 140 reaches a predetermined liquid level (e.g., the intermediate position), the power supplies of the third solenoid valve 142 and the first liquid supply pump 122 are turned off, thereby completing the provision of the liquid to be sprayed (e.g., completing the ink filling process).

[0145] By adopting the above means, the present disclosure can achieve automatic provision of the liquid to be sprayed (e.g., automatic ink filling).

[0146] Figure 4FIG. 0 shows a flowchart of a method 400 for cleaning a spraying system according to an embodiment of the present disclosure. It should be understood that the method 400 can be executed, for example, at the control device 102 or at the Figure 9 electronic device 900 described. It should be understood that the method 400 may further include additional actions not shown and / or the actions shown may be omitted, and the scope of the present disclosure is not limited in this regard.

[0147] At step 402, if the control device 102 detects a cleaning pipeline instruction, the power supply of the second three-way solenoid valve is turned on so that the cleaning liquid container and the first solenoid valve are connected.

[0148] It should be understood that when the three-way solenoid valve is not powered, the fluid can flow between the COM port and the NO port; when the three-way solenoid valve is powered, the fluid can flow between the COM port and the NC port. As Figure 1 shown, the COM port of the first three-way solenoid valve 172 is connected to the second coupling device 114, and the NO port of the first three-way solenoid valve 172 is connected to the cleaning liquid container 170. If a cleaning pipeline instruction is detected, the power supply of the second three-way solenoid valve 116 is turned on, so that the COM port and the NC port of the second three-way solenoid valve 116 are connected, thereby connecting the cleaning liquid container 170 to the first solenoid valve 120.

[0149] At step 404, the control device 102 turns on the power supplies of the first solenoid valve, the third solenoid valve, the first liquid supply pump, the fourth solenoid valve, the sixth solenoid valve, the seventh solenoid valve, and the stirrer configured for the pressure bottle, and turns off the power supplies of other valves and pumps, so that the cleaning liquid in the cleaning liquid container fills the main liquid supply pipeline, the nozzle, and the pressure bottle.

[0150] For example, the control device 102 turns on the power supplies of the first solenoid valve 120, the first liquid supply pump 122, the third solenoid valve 142, the fourth solenoid valve 124, the sixth solenoid valve 132, the seventh solenoid valve 168, and the stirrer 146 configured for the pressure bottle. It should be understood that the volume of the liquid supply pipeline is very small. Therefore, driven by the first liquid supply pump 122, the cleaning liquid in the cleaning liquid container 170 will quickly fill the main liquid supply pipeline 130, the nozzle 160, and the pressure bottle 140. Turning on the power supply of the stirrer in the pressure bottle 140 can put the stirrer in a stirring equipment state.

[0151] At step 406, the control device 102 determines whether a third predetermined time interval has been reached.

[0152] Regarding the third predetermined time interval, it is a set cleaning time and is associated with the volumes of the liquid supply pipeline and the pressure bottle.

[0153] At step 408, if the control device 102 determines that the third predetermined time interval has elapsed, the power supply to the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve is turned off.

[0154] For example, if the third predetermined time interval elapses, the power supply to the fourth solenoid valve 124, the sixth solenoid valve 132, and the seventh solenoid valve 168 is turned off, and the cleaning liquid is mainly supplied into the pressure bottle 140.

[0155] At step 410, if the control device 102 detects the signal of the highest liquid level of the pressure bottle, the power supply to the third solenoid valve and the first liquid supply pump is turned off, and the stirrer is made to stir.

[0156] For example, if the liquid level of the cleaning liquid in the pressure bottle 140 reaches the highest liquid level corresponding to the signal of the highest liquid level, the power supply to the third solenoid valve 142 connected to the first interface 143 of the pressure bottle 140 is turned off, and the power supply to the first liquid supply pump 122 is turned off. The cleaning liquid no longer enters the pressure bottle 140. At this time, the stirrer 146 is made to stir, which can drive the cleaning liquid to better clean the pressure bottle 140. It should be understood that since the present disclosure stirs when the liquid level of the cleaning liquid in the pressure bottle 140 reaches the highest liquid level, the present disclosure can save the amount of liquid required for cleaning and clean thoroughly.

[0157] At step 412, if the control device 102 determines that the fourth predetermined time interval has elapsed, the power supply to the stirrer is turned off.

[0158] For example, after the stirring time corresponding to the fourth predetermined time interval arrives, the power supply to the stirrer 146 is turned off to stop stirring.

[0159] Then, the power supply to the proportional valve 152 is turned on, so that under the action of the compressed gas communicated by the proportional valve 152, the cleaning liquid in the pressure bottle 140 is discharged.

[0160] By adopting the above means, the present disclosure can conveniently and automatically complete the cleaning of the liquid supply pipeline, the pressure bottle, and the nozzle. During the cleaning process, it is not necessary to replace the cleaning liquid and the liquid supply unit, nor is it necessary to manually clean the pipe interface, and it can significantly save the amount of liquid required for cleaning.

[0161] In some embodiments, the method 400 further includes a method for emptying the liquid in the capillary of the nozzle. This method includes, for example:

[0162] First, if the control device 102 detects a liquid evacuation instruction in the capillary, it supplies power to the first three-way solenoid valve and the second three-way solenoid valve to connect air to the first solenoid valve. For example, it supplies power to the first three-way solenoid valve 172 so that the COM port of the first three-way solenoid valve 172 is connected to the NC port; it supplies power to the second three-way solenoid valve 116 so that the COM port of the second three-way solenoid valve 116 is connected to the NC port, thereby connecting air to the first solenoid valve 120.

[0163] Then, the control device 102 supplies power to the first solenoid valve, the third solenoid valve, the first liquid supply pump, the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve, and disconnects the power supply of other valves and pumps, and allows air to evacuate the liquid in the main liquid supply pipeline and the pressure bottle.

[0164] After that, the control device 102 determines whether the fifth predetermined time interval has been reached.

[0165] Furthermore, if the control device 102 determines that the fifth predetermined time interval has been reached, it turns off the power supply of the seventh solenoid valve to allow air to evacuate the liquid in the capillary configured for the nozzle.

[0166] By adopting the above means, the present disclosure can automatically empty the liquid in the liquid pipeline, nozzle, and pressure bottle.

[0167] Figure 5 The flowchart of a method 500 for making the liquid supply match the spraying speed according to an embodiment of the present disclosure is shown. It should be understood that the method 500 can be executed, for example, at the control device 102 or at Figure 9 the described electronic device 900. It should be understood that the method 500 may further include additional actions not shown and / or may omit the shown actions, and the scope of the present disclosure is not limited in this regard.

[0168] At step 502, the control device 102 acquires the flow rate detection data on the main liquid supply pipeline and the motion speed data of the target object to be sprayed.

[0169] For example, the control device 102 acquires in real time the flow rate detection data detected by the flow meter 126 on the main liquid supply pipeline and the motion speed data of the target object (e.g., substrate) to be sprayed detected by a speed detection device such as an encoder.

[0170] For example, the current motion speed of the fabric is 1 m / s; the corresponding flow rate of the liquid to be sprayed (e.g., dye solution) is, for example, 10 L / min. It should be understood that during the spraying process of the fabric, there is an acceleration and deceleration process, and correspondingly, the flow rate of the liquid to be sprayed (e.g., dye solution) also needs to be adjusted.

[0171] At step 504, the control device 102 adjusts the opening degree of the proportional valve based on the ratio between the flow detection data and the movement speed data so that the ratio remains constant.

[0172] It should be understood that, with the liquid supply pipeline unchanged, the hydraulic pressure in the liquid supply pipeline is related to the flow rate of the liquid supply pipeline. As described above, the present disclosure adjusts the proportional valve to change the air pressure in the pressure bottle, and then adjusts the hydraulic pressure and flow rate in the main liquid supply pipeline. The adjustment inertia is low and the response speed is fast. Therefore, the adjustment of the liquid supply pipeline flow rate can be matched with the change of the substrate movement speed. Specifically, by making the ratio between the flow detection data and the movement speed data remain constant, the opening degree of the proportional valve is adjusted, so that the amount of the liquid to be sprayed obtained per unit area of the target object remains constant whether in the steady-state movement state or in the speed-fluctuating movement state of acceleration and deceleration. Thus, the present disclosure can achieve uniform spraying even when the movement of the target object fluctuates. Thereby, the spraying quality is significantly improved.

[0173] Figure 6 The flowchart of a method 600 for stopping spraying according to an embodiment of the present disclosure is shown. It should be understood that the method 600 can be executed, for example, at the control device 102, or can also be executed at Figure 9 the described electronic device 900. It should be understood that the method 600 may further include additional actions not shown and / or may omit the shown actions, and the scope of the present disclosure is not limited in this regard.

[0174] At step 602, if the control device 102 detects a stop spraying instruction, the first solenoid valve, the sixth solenoid valve, and the first liquid supply pump are maintained powered, and the power supply of the fourth solenoid valve is turned on, and the power supplies of other valves and pumps are turned off. The fourth solenoid valve is configured to be in parallel with the pressure bottle.

[0175] If the control device 102 detects a stop spraying instruction, the first solenoid valve 120, the sixth solenoid valve 132, and the first liquid supply pump 122 are maintained powered, and the power supply of the fourth solenoid valve 124 is turned on. And the power supplies of other valves such as the third solenoid valve 142, the seventh solenoid valve 168, and the proportional valve 152 are turned off.

[0176] At step 604, the control device 102 reverses the first liquid supply pump. Thus, the liquid to be sprayed in the nozzle and the liquid supply pipeline can flow back.

[0177] Regarding the first liquid supply pump 122, it is configured to be able to rotate forward and reverse, for example.

[0178] At step 606, the control device 102 determines whether a first predetermined time interval has been reached, the first predetermined time interval being associated with the number of capillaries configured for the nozzle and the length of the main liquid supply line.

[0179] In some embodiments, the first predetermined time interval is further configured to: perform a predetermined amount of back - suction on the liquid to be sprayed in the nozzle and the liquid supply line, so that the back - sucked liquid to be sprayed remains in the main liquid supply flow path, while avoiding air (e.g., through the ink outlet at the end of the capillary) from entering the main liquid supply flow path due to the back - suction.

[0180] At step 608, if the control device 102 determines that the first predetermined time interval has been reached, the power supplies to the fourth solenoid valve, the sixth solenoid valve, and the first liquid supply pump are turned off.

[0181] It should be understood that generally, there is a certain inertia in the liquid to be sprayed in the nozzle and the liquid supply line. After receiving the stop spraying instruction, by reversing the first liquid supply pump for the first predetermined time interval, a certain amount of the liquid to be sprayed in the nozzle and the liquid supply line is back - sucked into the main liquid supply flow path, and then the power supplies to the fourth solenoid valve 124, the sixth solenoid valve 132, and the first liquid supply pump 122 are turned off, avoiding the liquid to be sprayed in the nozzle from dripping onto the surface of the target object due to inertia and causing contamination of the target object.

[0182] By adopting the above - mentioned means, the present disclosure can achieve rapid stop of liquid supply and avoid contamination of the target object caused by the liquid to be sprayed in the nozzle dripping onto the surface of the target object due to inertia.

[0183] Figure 7 A flowchart of a method 700 for recovering the liquid to be sprayed according to an embodiment of the present disclosure is shown. It should be understood that the method 700 can be executed, for example, at the control device 102, or can also be executed at Figure 9 the described electronic device 900. It should be understood that the method 700 may further include additional actions not shown and / or may omit the shown actions, and the scope of the present disclosure is not limited in this regard.

[0184] At step 702, if the control device 102 detects a liquid - to - be - sprayed recovery instruction, the power supplies to the first solenoid valve, the third solenoid valve, and the first liquid supply pump are turned on, and the power supplies of other valves and pumps are turned off.

[0185] At step 704, the control device 102 reverses the first liquid supply pump.

[0186] At step 706, the control device 102 determines whether a second predetermined time interval has been reached.

[0187] At step 708, if the control device 102 determines that the second predetermined time interval has elapsed, power supply to the first solenoid valve, the third solenoid valve, and the first liquid supply pump is turned off.

[0188] By adopting the above means, the present disclosure can quickly recover the liquid to be sprayed in the liquid supply pipeline, the nozzle, and the pressure bottle to the ink supply unit, avoiding waste of the liquid to be sprayed.

[0189] Figure 8 FIG. 7 shows a flowchart of a method 800 for flushing the surface of a nozzle according to an embodiment of the present disclosure. It should be understood that the method 800 can be executed, for example, at the control device 102 or at Figure 9 the described electronic device 900. It should be understood that the method 800 may further include additional actions not shown and / or actions shown may be omitted, and the scope of the present disclosure is not limited in this regard.

[0190] It should be understood that after the nozzle finishes spraying, there will be some liquid to be sprayed (e.g., ink) remaining on the capillary. Therefore, it is necessary to flush the surface of the nozzle.

[0191] At step 802, if the control device 102 detects a nozzle surface flushing instruction, power supply to the eighth solenoid valve and the fourth liquid supply pump is turned on to supply the cleaning liquid from the cleaning liquid container to the input channel of the flushing nozzle. The eighth solenoid valve and the fourth liquid supply pump are connected between the cleaning liquid container and the input channel of the flushing nozzle.

[0192] Regarding the flushing nozzle, it is configured with, for example, a fan-shaped nozzle and a motion mechanism. The fan-shaped nozzle is used to output the cleaning liquid or compressed gas. The motion mechanism is used to drive the flushing nozzle to move along the extension direction of the nozzle.

[0193] For example, if the control device 102 detects a nozzle surface flushing instruction, power supply to the eighth solenoid valve 194 and the fourth liquid supply pump 192 is turned on to supply the cleaning liquid from the cleaning liquid container (in some embodiments, the cleaning liquid container is the cleaning liquid container 170, and in other embodiments, the cleaning liquid container is another container different from the cleaning liquid container 170) to the input channel 198 of the flushing nozzle 190.

[0194] At step 804, the control device 102 controls the flushing nozzle to move from one end of the nozzle to the other end along the extension direction of the nozzle, so as to spray the cleaning liquid output from the nozzle of the flushing nozzle onto the surface of the nozzle, thereby cleaning the liquid to be sprayed remaining on the surface of the nozzle.

[0195] At step 806, the control device 102 turns on the power supply to the ninth solenoid valve and turns off the power supply to the eighth solenoid valve and the fourth liquid supply pump, so that air is supplied to the input channel of the flushing nozzle via the ninth solenoid valve.

[0196] At step 808, the control device 102 controls the flushing nozzle to move from one end of the nozzle head to the other end along the extension direction of the nozzle head, so as to blow dry the cleaning liquid on the surface of the nozzle head with the air output from the nozzle of the flushing nozzle.

[0197] By adopting the above means, the present disclosure can conveniently clean the liquid to be sprayed remaining on the surface of the nozzle head.

[0198] Figure 14 The flowchart of a method 1400 for cleaning a spraying system according to an embodiment of the present disclosure is shown. It should be understood that the method 1400 can be executed, for example, at the control device 102, or can also be executed at Figure 9 the described electronic device 900. The method 1400 can be implemented based on the spraying system 1000, for example. It should be understood that the method 1400 may further include additional actions not shown and / or may omit the shown actions, and the scope of the present disclosure is not limited in this regard.

[0199] At step 1402, in response to detecting a cleaning nozzle head instruction, the control solenoid valve assembly is controlled to make the second interface and the third interface of the solenoid valve assembly communicate with each other, and the power supply of the stirrer configured in the pressure bottle is turned on;

[0200] At step 1404, the second liquid supply pump is rotated forward so that the cleaning liquid enters the nozzle head.

[0201] For example, when the control device 102 detects a cleaning nozzle head instruction, the control device 102 controls the solenoid valve assembly (such as the four-way valve 121) to make the second interface (such as the 2nd interface) and the third interface (such as the 3rd interface) of the solenoid valve assembly communicate with each other, and turns on the power supply of the stirrer configured in the pressure bottle 140. Then, the control device 102 rotates the second liquid supply pump 171 forward so that the cleaning liquid enters the nozzle head 160 to clean the nozzle head 10.

[0202] Figure 15 The flowchart of a method 1500 for cleaning a spraying system according to an embodiment of the present disclosure is shown. It should be understood that the method 1500 can be executed, for example, at the control device 102, or can also be executed at Figure 9 the described electronic device 900. The method 1500 can be implemented based on the spraying system 1000, for example. It should be understood that the method 1500 may further include additional actions not shown and / or may omit the shown actions, and the scope of the present disclosure is not limited in this regard.

[0203] At step 1502, if the control device 102 detects a cleaning pipeline instruction, it controls the solenoid valve assembly to connect the second interface and the first interface of the solenoid valve assembly, and cuts off the power supply to the eighth solenoid valve. The eighth solenoid valve is connected between the first liquid supply pump and the first interface of the pressure bottle.

[0204] At step 1504, the control device 102 makes the second liquid supply pump rotate forward so that the cleaning liquid in the cleaning liquid container enters the main liquid supply pipeline and the pressure bottle.

[0205] At step 1506, if the control device 102 detects the highest liquid level signal of the pressure bottle, it controls the solenoid valve assembly to disconnect between the second interface and the first interface of the solenoid valve assembly and cut off the power supply to the second liquid supply pump, and makes the stirrer stir.

[0206] At step 1508, if the control device 102 determines that the fourth predetermined time interval has been reached, it cuts off the power supply to the stirrer.

[0207] At step 1510, the control device 102 turns on the power supply to the eighth solenoid valve and makes the first liquid supply pump rotate in reverse to drain the cleaned cleaning liquid.

[0208] For example, when the control device 102 detects a cleaning pipeline instruction, the control device 102 controls the solenoid valve assembly (such as the four-way valve 121) to connect the second interface (such as interface No. 2) and the first interface (such as interface No. 1) of the solenoid valve assembly, and cuts off the power supply to the eighth solenoid valve 151 and the power supply to the proportional valve 152. Among them, the eighth solenoid valve 151 is connected between the first liquid supply pump 122 and the first interface 143 of the pressure bottle 140. Then, the control device 102 makes the second liquid supply pump 171 rotate forward so that the cleaning liquid in the cleaning liquid container 170 enters the main liquid supply pipeline 130 and the pressure bottle 140. Then, in response to detecting the highest liquid level signal of the pressure bottle 140, the control device 102 controls the solenoid valve assembly (such as the four-way valve 121) to disconnect between the second interface (such as interface No. 2) and the first interface (such as interface No. 1), and cuts off the power supply to the second liquid supply pump 171, and makes the stirrer 146 stir. In some embodiments, the highest liquid level is used to indicate that the pressure bottle 140 is full. In some embodiments, the highest liquid level is used to indicate the liquid level required for cleaning the pressure bottle 140. In some embodiments, the highest liquid level corresponds to, for example, the first liquid level gauge 141.

[0209] Then, in response to determining that the fourth predetermined time interval has been reached, the control device 102 cuts off the power supply to the stirrer. For example, after the stirring time corresponding to the fourth predetermined time interval arrives, the power supply to the stirrer 146 is cut off to stop stirring.

[0210] Then, the control device 102 turns on the power supply of the eighth solenoid valve 151 and reverses the first liquid supply pump 122 so as to discharge the cleaned cleaning liquid from the pressure bottle 140.

[0211] According to the spraying system 1000, the nozzle 160 and the pressure bottle 140 can be cleaned separately. When cleaning the nozzle 160, an appropriate flow rate and cleaning pressure can be set through the second liquid supply pump 171. Moreover, the cleaning liquid directly enters the nozzle 160 without flowing through the pressure bottle 140, which can avoid the problem that the nozzle 160 is blocked due to possible impurities in the pressure bottle 140.

[0212] Figure 9 A block diagram of an electronic device 900 suitable for implementing the embodiments of the present disclosure is schematically shown. The electronic device 900 may be used to implement the execution of Figures 2 to 8 The methods 200 to 800 shown. As shown in the figure, the electronic device 900 includes a central processing unit (i.e., CPU 901), which can execute various appropriate actions and processes according to the computer program instructions stored in the read-only memory (i.e., ROM 902) or the computer program instructions loaded from the storage unit 908 into the random access memory (i.e., RAM 903). In the RAM 903, various programs and data required for the operation of the electronic device 900 can also be stored. The CPU 901, ROM 902, and RAM 903 are connected to each other through a bus 904. The input / output interface (i.e., I / O interface 905) is also connected to the bus 904.

[0213] A plurality of components in the electronic device 900 are connected to the I / O interface 905, including: an input unit 906, an output unit 907, a storage unit 908, and the CPU 901 executes the various methods and processes described above, such as executing the methods 200 to 800. For example, in some embodiments, the methods 200 to 800 may be implemented as computer software programs, which are stored in a machine-readable medium, such as the storage unit 908. In some embodiments, part or all of the computer program may be loaded and / or installed onto the electronic device 900 via the ROM 902 and / or the communication unit 909. When the computer program is loaded into the RAM 903 and executed by the CPU 901, one or more operations of the methods 400 and 500 described above can be executed. Alternatively, in other embodiments, the CPU 901 may be configured to execute one or more actions of the methods 200 to 800 in any other appropriate manner (e.g., by means of firmware).

[0214] It should be further noted that the present disclosure can be a method, an apparatus, a system, and / or a computer program product. The computer program product may include a computer-readable storage medium having thereon computer-readable program instructions for performing various aspects of the present disclosure.

[0215] A computer-readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. A computer-readable storage medium may be, for example, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanically encoded device such as a punch card or raised structures in grooves having instructions stored thereon, and any suitable combination of the foregoing. The computer-readable storage medium as used herein is not construed as being a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0216] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to various computing / processing devices, or downloaded to an external computer or external storage device through a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network may include a copper transmission cable, an optical fiber transmission, a wireless transmission, a router, a firewall, a switch, a gateway computer, and / or an edge server. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0217] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine - related instructions, microcode, firmware instructions, state - setting data, or source code or object code written in any combination of one or more programming languages, including object - oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as the "C" language or similar programming languages. The computer - readable program instructions may be executed entirely on the user's computer, partially on the user's computer, executed as a stand - alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider). In some embodiments, by using the state information of the computer - readable program instructions to customize an electronic circuit, such as a programmable logic circuit, a field - programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer - readable program instructions to implement various aspects of the present disclosure.

[0218] Aspects of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each block of the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts and / or block diagrams, can be implemented by computer - readable program instructions.

[0219] These computer - readable program instructions can be provided to a processing unit of a processor in a voice interaction device, a general - purpose computer, a special - purpose computer, or other programmable data - processing device, thereby producing a machine such that when these instructions are executed by the processing unit of the computer or other programmable data - processing device, a device is produced that implements the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer - readable program instructions can also be stored in a computer - readable storage medium, and these instructions cause the computer, the programmable data - processing device, and / or other devices to work in a specific manner. Thus, the computer - readable medium storing the instructions includes a manufacture, which includes instructions for implementing various aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0220] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other devices to produce a computer-implemented process such that the instructions executed on the computer, other programmable data processing apparatus, or other devices implement the functions / acts specified in one or more boxes of the flowchart and / or block diagram.

[0221] The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of an instruction, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block of the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or acts, or by a combination of dedicated hardware and computer instructions.

[0222] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

[0223] The above are only alternative embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A liquid supply system, the liquid supply system is used to provide a liquid to be sprayed to a nozzle, characterized in that: The liquid supply system comprises: A liquid supply unit, used for containing the liquid to be sprayed, the liquid supply unit being connected to the first interface of the pressure bottle via a first liquid supply pump; A pressure bottle, wherein the second interface of the pressure bottle is connected to the main liquid supply pipeline; A main liquid supply pipeline, the main liquid supply pipeline is connected to the liquid inlet of the spray head, and the main liquid supply pipeline is at least equipped with a solenoid valve assembly and a hydraulic detection device; A safety bottle, one end of which is connected to a gas source containing compressed gas via a proportional valve, and the other end of which is connected to an exchange port of the pressure bottle; and The control device is configured to adjust the opening of the proportional valve based on the gas pressure at the proportional valve, so that the hydraulic pressure on the main liquid supply pipeline is adjusted by adjusting the gas pressure of the pressure bottle.

2. The liquid supply system according to claim 1, characterized in that: Also includes: a liquid level detection device, disposed inside the pressure bottle and configured to detect the liquid level in the pressure bottle; as well as a pressure detection device, disposed below the pressure bottle and configured to detect the pressure applied by the pressure bottle to the pressure detection device; The control device is further configured to control the first liquid supply pump according to the liquid level and the pressure, so as to control the liquid level in the pressure bottle.

3. The liquid supply system according to claim 2, characterized in that: The control device is further configured to determine that the pressure detected by the pressure detection device is the target liquid level pressure when the liquid level detected by the liquid level detection device corresponds to the target liquid level, and to adjust the first liquid supply pump according to the pressure detected by the pressure detection device and the target liquid level pressure so that the liquid level in the pressure bottle matches the target liquid level; The pressure detection device is a gravity sensor, and the pressure detected by the pressure detection device is associated with the sum of the weights of the pressure bottle and the liquid to be sprayed contained in the pressure bottle.

4. The liquid supply system according to claim 1, characterized in that: Also includes: A cleaning liquid container, used to contain cleaning liquid, the cleaning liquid container is connected to the second interface of the solenoid valve assembly via a second liquid supply pump; The solenoid valve assembly includes at least: A first interface is connected to the main liquid supply pipeline; Second interface; as well as The third interface is connected to the liquid inlet of the nozzle; The control device is further configured to at least one of the following: Controlling the solenoid valve assembly so that the second interface and the third interface of the solenoid valve assembly are connected, and controlling the second liquid supply pump to rotate forwardly, so as to clean the nozzle; and The electromagnetic valve assembly is controlled so that the second interface of the electromagnetic valve assembly is connected with the first interface, and the second liquid supply pump is controlled to rotate forward and the first liquid supply pump is controlled to rotate reversely, so as to clean the safety bottle.

5. The liquid supply system according to claim 4, characterized in that: Also includes: A moisturizing liquid container is configured to contain moisturizing liquid, and the moisturizing liquid container is connected to the fourth interface of the solenoid valve assembly via the third liquid supply pump; The solenoid valve assembly also includes a fourth interface; The control device is also configured to control the solenoid valve assembly so that the fourth interface of the solenoid valve assembly is connected to the third interface, and control the third liquid supply pump to rotate forward so that the moisturizing liquid enters the nozzle to moisturize the nozzle.

6. The liquid supply system according to claim 1, characterized in that: Also includes a first solenoid valve; the solenoid valve assembly includes a sixth solenoid valve; The first liquid supply pump is arranged between the first solenoid valve and the fourth solenoid valve, and the fourth solenoid valve is arranged to be connected in parallel with the pressure bottle; The control device is also configured to obtain the hydraulic detection data detected by the hydraulic detection device, and to turn on or off the power supply to the solenoid valve, the proportional valve, and the first liquid supply pump.

7. The liquid supply system according to claim 1, characterized in that: Also includes: a cleaning liquid container, used for containing cleaning liquid; A first three-way solenoid valve is configured to connect the ionized water container or the air to the input channel of the liquid supply unit; A second three-way solenoid valve is configured to connect one end of the first solenoid valve to an input channel of the liquid supply unit or an internal channel of the liquid supply unit; a waste container configured to hold waste liquid; a seventh solenoid valve, arranged between the waste liquid container and the liquid outlet of the nozzle; a moisturizing liquid container configured to contain a moisturizing liquid; A second solenoid valve is disposed between the moisturizing liquid container and the main liquid supply pipeline, and is configured to supply the moisturizing liquid contained in the moisturizing liquid container to the main liquid supply pipeline when the power supply of the second solenoid valve is turned on; A first coupling device is configured to realize connection and disconnection between the first solenoid valve input side pipeline and the output channel of the ink supply unit; a second coupling device configured to realize connection and disconnection between the input channel of the ink supply unit and the first three-way solenoid valve; as well as The fifth solenoid valve is arranged between the liquid output end of the safety bottle and the waste liquid container.

8. The liquid supply system according to claim 1, characterized in that: Also includes: A flushing nozzle, comprising a nozzle and an input channel, wherein the input channel of the flushing nozzle is respectively connected to a cleaning liquid pipeline and an air pipeline, and the flushing nozzle is configured to eject the cleaning liquid or air inputted through the input channel through the nozzle based on a nozzle surface flushing instruction, and move from one end of the nozzle to the other end of the nozzle along an extension direction of the nozzle; A fourth liquid supply pump is arranged on the cleaning liquid pipeline, the input end of the fourth liquid supply pump is provided with deionization, and the output end of the fourth liquid supply pump is connected to the eighth solenoid valve; an eighth solenoid valve, which is arranged on the cleaning liquid pipeline, and is configured to supply the cleaning liquid output by the fourth liquid supply pump to the input channel of the flushing nozzle when the power supply of the eighth solenoid valve is turned on; as well as The ninth solenoid valve is arranged on the air pipeline, and is configured to provide compressed air from the air pipeline to the input channel of the flushing nozzle when the power supply of the ninth solenoid valve is turned on.

9. A spraying system, characterized in that: include: The liquid supply system according to any one of claims 1 to 8; One or more spray heads, used to spray the liquid to be sprayed on the target object, the spray heads comprising: A capillary tube group, used for outputting the liquid to be sprayed; The flow channel is used to supply the liquid to be sprayed from the liquid supply system to each capillary in the capillary group, and the flow channel is connected with the liquid inlet and the liquid outlet.

10. A method for controlling a liquid supply system according to any one of claims 1 to 8, characterized in that: The method comprises: In response to detecting a spray start instruction, power is supplied to the first liquid supply pump and the proportional valve so that the liquid to be sprayed in the liquid supply unit flows through the pressure bottle; adjusting the rotation speed of the first liquid supply pump based on the acquired liquid level data in the pressure bottle; Determining whether the hydraulic pressure detection data on the main liquid supply pipeline is greater than or equal to a predetermined hydraulic pressure threshold; In response to determining that the hydraulic pressure detection data on the main liquid supply pipeline is greater than or equal to a predetermined hydraulic pressure threshold, controlling the solenoid valve assembly so that the liquid to be sprayed enters the liquid inlet of the spray head; and Adjust the opening of the proportional valve so that the liquid to be sprayed provided to the spray head reaches a predetermined flow rate.

11. The method according to claim 10, characterized in that Also includes: In response to detecting a spray start instruction, power is supplied to the first solenoid valve, the first liquid supply pump, the third solenoid valve, and the proportional valve so that the liquid to be sprayed in the liquid supply unit flows through the pressure bottle; as well as In response to determining that the hydraulic pressure detection data on the main liquid supply pipeline is greater than or equal to the predetermined hydraulic pressure threshold, the sixth solenoid valve is powered on so that the liquid to be sprayed enters the liquid inlet of the spray head through the sixth solenoid valve.

12. The method according to claim 11, characterized in that Also includes: Acquire flow detection data on the main liquid supply pipeline and movement speed data of the target object to be sprayed; as well as Based on the ratio between the flow detection data and the movement speed data, the opening of the proportional valve is adjusted so that the ratio remains constant.

13. The method according to claim 11, characterized in that Also includes: In response to detecting a spray stop instruction, the first solenoid valve, the sixth solenoid valve and the first liquid supply pump are powered on, the power supply to the fourth solenoid valve is turned on, and the power supplies to other valves and pumps are disconnected, wherein the fourth solenoid valve is configured to be connected in parallel with the pressure bottle; Reversing the first liquid supply pump; Determining whether a first predetermined time interval has been reached, the first predetermined time interval being associated with the number of capillaries configured for the spray head and the length of the main liquid supply pipeline; and In response to determining that the first predetermined time interval has been reached, power to the fourth solenoid valve, the sixth solenoid valve, and the first liquid supply pump is turned off.

14. The method according to claim 11, characterized in that Also includes: In response to detecting a command to recover the liquid to be sprayed, power is turned on to the first solenoid valve, the third solenoid valve and the first liquid supply pump, and power is turned off to other valves and pumps; Reversing the first liquid supply pump; determining whether a second predetermined time interval has been reached; and In response to determining that the second predetermined time interval has been reached, power to the first solenoid valve, the third solenoid valve, and the first liquid supply pump is turned off.

15. The method according to claim 11, characterized in that Also includes: In response to detecting a cleaning line instruction, power is supplied to the second three-way solenoid valve so that the cleaning liquid container is connected to the first solenoid valve; Turning on the power supply of the first solenoid valve, the third solenoid valve, the first liquid supply pump, the fourth solenoid valve, the sixth solenoid valve, the seventh solenoid valve, and the agitator configured for the pressure bottle, and disconnecting the power supply of other valves and pumps, so that the cleaning liquid in the cleaning liquid container fills the main liquid supply pipeline, the nozzle, and the pressure bottle; determining whether a third predetermined time interval has been reached; and in response to determining that the third predetermined time interval has been reached, shutting off power to the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve; In response to detecting a signal indicating a maximum value of the liquid level of the pressure bottle, turning off power to the third solenoid valve and the first liquid supply pump, and enabling the stirrer to stir; and In response to determining that the fourth predetermined time interval has been reached, power to the agitator is turned off.

16. The method according to claim 11, characterized in that Also includes: In response to detecting a liquid emptying instruction in the capillary tube, power is supplied to the first three-way solenoid valve and the second three-way solenoid valve so that air is connected to the first solenoid valve; Turning on the power supply of the first solenoid valve, the third solenoid valve, the first liquid supply pump, the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve, while disconnecting the power supply of other valves and pumps, and allowing the air to empty the liquid in the main liquid supply pipeline and the pressure bottle; determining whether a fifth predetermined time interval has been reached; and In response to determining that the fifth predetermined time interval has been reached, power to the seventh solenoid valve is turned off, so that air evacuates the liquid in the capillary tube provided with the spray head.

17. The method according to claim 11, characterized in that Also includes: In response to detecting the shutdown moisturizing instruction, the power supply to the second solenoid valve is turned on so that the moisturizing liquid container is connected to the main liquid supply pipeline; The first liquid supply pump, the fourth solenoid valve, and the sixth solenoid valve are turned on, and the power supply of other valves and pumps is disconnected, and the moisturizing liquid from the moisturizing liquid container fills the main liquid supply pipeline and the nozzle; determining whether a sixth predetermined time interval has been reached; and In response to determining that the sixth predetermined time interval has been reached, power to the fourth solenoid valve and the sixth solenoid valve is turned off.

18. The method according to claim 11, characterized in that Also includes: In response to detecting a nozzle surface flushing instruction, power is turned on to an eighth solenoid valve and a fourth liquid supply pump so as to supply cleaning liquid from a cleaning liquid container to an input channel of the flushing nozzle, wherein the eighth solenoid valve and the fourth liquid supply pump are connected between the cleaning liquid container and the input channel of the flushing nozzle; Control the flushing nozzle to move from one end of the nozzle to the other end of the nozzle along the extension direction of the nozzle, so as to spray the cleaning liquid output by the nozzle of the flushing nozzle onto the surface of the nozzle, thereby cleaning the residual liquid to be sprayed on the surface of the nozzle; Turning on the power supply of the ninth solenoid valve and turning off the power supply of the eighth solenoid valve and the fourth liquid supply pump so that air is supplied to the input channel of the flushing nozzle via the ninth solenoid valve; as well as The flushing nozzle is controlled to move from one end of the nozzle to the other end of the nozzle along the extension direction of the nozzle, so that the air output by the nozzle of the flushing nozzle can dry the cleaning liquid on the surface of the nozzle.

19. The method according to claim 11, characterized in that Also includes: In response to detecting the pressure bottle detection instruction, turning on the power supply to the fifth solenoid valve and the proportional valve, and turning off the power supply to other valves and the pump; obtaining a float detection signal of the pressure bottle; and In response to determining that the sixth predetermined time interval has been reached, power to the fifth solenoid valve and the proportional valve is turned off.

20. The method according to claim 11, characterized in that Also includes: In response to detecting an instruction to provide the liquid to be sprayed, power is supplied to the first solenoid valve, the third solenoid valve, the fourth solenoid valve, the sixth solenoid valve, the seventh solenoid valve, and the first liquid supply pump, so that the liquid to be sprayed fills the main liquid supply pipeline, the spray head, and the pressure bottle; In response to determining that the seventh predetermined time interval has been reached, turning off power to the fourth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve; and In response to detecting the liquid level data indicating that the liquid level in the pressure bottle reaches a predetermined intermediate position, power supply to the third solenoid valve and the first liquid supply pump is turned off.

21. The method according to claim 10, characterized in that Also includes: In response to detecting the instruction to clean the nozzle, the solenoid valve assembly is controlled so that the second interface and the third interface of the solenoid valve assembly are connected, and the power supply of the agitator configured by the pressure bottle is turned on; Make the second liquid supply pump rotate forward so that the cleaning liquid enters the nozzle.

22. The method according to claim 10, characterized in that Also includes: In response to detecting a pipeline cleaning instruction, controlling the solenoid valve assembly so that the second interface of the solenoid valve assembly is connected to the first interface, disconnecting the power supply of the eighth solenoid valve, and connecting the eighth solenoid valve between the first liquid supply pump and the first interface of the pressure bottle; The second liquid supply pump rotates forward so that the cleaning liquid in the cleaning liquid container enters the main liquid supply pipeline and the pressure bottle; In response to detecting a maximum liquid level signal of the pressure bottle, controlling the solenoid valve assembly to disconnect the second interface of the solenoid valve assembly from the first interface and disconnect the power supply of the second liquid supply pump, and enabling the stirrer to stir; and in response to determining that the fourth predetermined time interval has been reached, shutting off power to the agitator; The eighth solenoid valve is powered on, and the first liquid supply pump is reversed to discharge the cleaning liquid after cleaning.

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