Printer and printing head cleaning method

Abstract

The invention discloses a printer and a printing head cleaning method. The printer comprises a printing head cleaning stage and a printing pre-stage. When the printer is in a printing head cleaning stage, a printing head is in butt joint with the ink stack assembly, the control valve assembly controls the pipeline between the ink storage container and the ink bag to be blocked, and controls the pipeline between the cleaning fluid container and the ink bag to be communicated and the pump body to be opened, so that cleaning fluid in the cleaning fluid container is sequentially pumped into the ink bag, the printing head, the ink stack assembly and the waste liquid container; when the printer is in a printing front stage, the printing head is in butt joint with the ink stack assembly, and the control valve assembly controls the pipeline between the ink storage container and the ink bag to be connected and controls the pipeline between the cleaning liquid container and the ink bag to be blocked and controls the pump body to be opened, so that ink in the ink storage container is sequentially pumped into the ink bag, the printing head, the ink stack assembly and the waste liquid container.

Description

Technical Field

[0001] This application relates to the field of printing equipment technology, and in particular to a method for cleaning a printer and its printhead. Background Technology

[0002] Traditional inkjet printers typically feature a doctor blade and an ink stack assembly. After printing, the printhead first moves to the vicinity of the doctor blade, where it scrapes away ink and debris near the printhead exit. Then, it moves to the ink stack assembly, which connects its ink suction nozzles to the printhead, keeping it moist and preventing ink from solidifying and clogging. If the printer will not be used for an extended period, the printhead should be cleaned to prevent ink buildup and clogging.

[0003] The printhead cleaning method in related technologies involves providing a flowing moisturizing solution to the ink stack assembly after it is connected to the printhead. This allows the ink inside the printhead to flow into the ink stack assembly and be flushed away by the moisturizing solution. However, in this method, the moisturizing solution has difficulty penetrating deep into the printhead and cannot clean the ink in the ink sac, thus still posing a high risk of clogging. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a printer that can reduce the risk of printhead clogging.

[0005] This application also proposes a printhead cleaning method for the aforementioned printer.

[0006] The printer according to the first aspect of this application includes an ink reservoir, a cleaning fluid container, a waste liquid container, an ink sac, a printhead, an ink stack assembly, a pump body, and a control valve assembly. The ink storage container, the ink sac, and the printhead are connected in sequence via pipes. The cleaning fluid container is connected to the ink sac via a pipe. The printhead communicates with the ink stack assembly when it docks with the ink stack assembly. The ink stack assembly and the waste liquid container are connected via pipes. The control valve assembly can control the opening and closing of the pipe between the ink storage container and the ink sac, and the control valve assembly can also control the opening and closing of the pipe between the cleaning fluid container and the ink sac. The printer includes a printhead cleaning stage and a pre-printing stage. During the printhead cleaning stage, the printhead is connected to the ink stack assembly. The control valve assembly controls the sealing of the tubing between the ink reservoir and the ink sac, and controls the opening of the tubing between the cleaning fluid container and the ink sac. The pump is activated to sequentially pump the cleaning fluid from the cleaning fluid container into the ink sac, the printhead, the ink stack assembly, and the waste liquid container. During the pre-printing stage, the printhead is connected to the ink stack assembly. The control valve assembly controls the opening of the tubing between the ink reservoir and the ink sac, and controls the sealing of the tubing between the cleaning fluid container and the ink sac. The pump is activated to sequentially pump the ink from the ink reservoir into the ink sac, the printhead, the ink stack assembly, and the waste liquid container.

[0007] The printer according to the embodiments of this application has at least the following beneficial effects: In the printer described in this application, when the printer is in the printhead cleaning stage, the printhead connects to the ink stack assembly. The control valve assembly controls the sealing of the pipeline between the ink reservoir and the ink sac, and controls the opening of the pipeline between the cleaning fluid container and the ink sac (the second valve is in the third state, and the third valve is in the fifth state). The pump body is turned on to pump the cleaning fluid in the cleaning fluid container sequentially into the ink sac, printhead, ink stack assembly, and waste liquid container. It can be understood that when the printer is in the printhead cleaning stage, under the action of the pump body, the cleaning fluid in the cleaning fluid container is sequentially pumped into the ink sac, printhead, ink stack assembly, and waste liquid container, thereby cleaning the ink sac and printhead. This method can achieve complete cleaning of the ink sac and printhead, meaning that there is no ink residue inside the ink sac and printhead, thus preventing the ink sac and printhead from being blocked by solidified ink, and improving the problem of ink clogging caused by power outages when the printer is not used for a long time. When the printer is in the pre-print stage, the printhead engages with the ink stack assembly. The control valve assembly controls the flow of the tubing between the ink reservoir and the ink cartridge, and controls the blockage of the tubing between the cleaning fluid container and the ink cartridge (the second valve is in the fourth position, and the third valve is in the fifth or sixth position). The pump activates, sequentially pumping ink from the ink reservoir into the ink cartridge, printhead, ink stack assembly, and waste fluid container. Essentially, during the pre-print stage, the pump sequentially pumps ink from the ink reservoir into the ink cartridge, printhead, ink stack assembly, and waste fluid container, thus using the ink to remove the cleaning fluid from the ink cartridge and printhead, preventing the cleaning fluid from affecting print quality.

[0008] According to some embodiments of this application, the pump body is disposed on the pipeline between the ink stack assembly and the waste liquid container.

[0009] According to some embodiments of this application, the control valve assembly includes a first valve disposed on a pipeline between the ink storage container and the ink sac, and the first valve is also disposed on a pipeline between the cleaning fluid container and the ink sac; When the printer is in the printhead cleaning stage, the pipeline between the ink reservoir and the ink sac is blocked by the first valve, and the pipeline between the cleaning fluid container and the ink sac is open by the first valve; when the printer is in the pre-printing stage, the pipeline between the ink reservoir and the ink sac is open by the first valve, and the pipeline between the cleaning fluid container and the ink sac is blocked by the first valve.

[0010] According to some embodiments of this application, the first valve is a three-way valve having a first valve port, a second valve port, and a third valve port. The ink outlet of the ink storage container is connected to the first valve port through a pipeline, the second valve port is connected to the inlet of the ink sac through a pipeline, and the liquid outlet of the cleaning fluid container is connected to the third valve port through a pipeline. The first valve has a first state and a second state; when the first valve is in the first state, the pipeline between the ink storage container and the ink sac is blocked, and the pipeline between the cleaning fluid container and the ink sac is open; when the first valve is in the second state, the pipeline between the ink storage container and the ink sac is open, and the pipeline between the cleaning fluid container and the ink sac is blocked.

[0011] According to some embodiments of this application, the control valve assembly includes a second valve and a third valve. The second valve is disposed on the pipeline between the ink storage container and the ink sac, and the second valve is also disposed on the pipeline between the cleaning fluid container and the ink sac; the third valve is disposed on the pipeline between the cleaning fluid container and the second valve. When the printer is in the printhead cleaning stage, the pipeline between the ink reservoir and the ink sac is blocked by the second valve, and the pipeline between the cleaning fluid container and the ink sac is open by the second valve and the third valve; when the printer is in the pre-printing stage, the pipeline between the ink reservoir and the ink sac is open by the second valve, and the pipeline between the cleaning fluid container and the ink sac is blocked by the second valve and / or the third valve.

[0012] According to some embodiments of this application, the second valve is a three-way valve having a fourth valve port, a fifth valve port, and a sixth valve port. The ink outlet of the ink storage container is connected to the fourth valve port via a pipeline, and the fifth valve port is connected to the inlet of the ink sac via a pipeline. The third valve is a two-way valve having a seventh valve port and an eighth valve port. The liquid outlet of the cleaning fluid container is connected to the seventh valve port via a pipeline, and the eighth valve port is connected to the sixth valve port via a pipeline. The second valve includes a third state and a fourth state, and the third valve includes a fifth state and a sixth state; when the second valve is in the third state and the third valve is in the fifth state, the pipeline between the ink storage container and the ink sac is blocked, and the pipeline between the cleaning fluid container and the ink sac is open; when the second valve is in the fourth state, the pipeline between the ink storage container and the ink sac is open, and the pipeline between the cleaning fluid container and the ink sac is blocked.

[0013] According to some embodiments of this application, the control valve assembly includes a fourth valve and a fifth valve, the fourth valve being disposed on the pipeline between the ink storage container and the ink sac, and the fifth valve being disposed on the pipeline between the cleaning fluid container and the ink sac; When the printer is in the printhead cleaning stage, the pipeline between the ink reservoir and the ink sac is blocked by the fourth valve, and the pipeline between the cleaning fluid container and the ink sac is open by the fifth valve; when the printer is in the pre-printing stage, the pipeline between the ink reservoir and the ink sac is open by the fourth valve, and the pipeline between the cleaning fluid container and the ink sac is blocked by the fifth valve.

[0014] According to some embodiments of this application, the fourth valve is a two-way valve having a ninth valve port and a tenth valve port. The ink outlet of the ink storage container is connected to the ninth valve port via a pipeline, and the tenth valve port is connected to the inlet of the ink sac via a pipeline. The fifth valve is a two-way valve having an eleventh valve port and a twelfth valve port. The liquid outlet of the cleaning fluid container is connected to the eleventh valve port via a pipeline, and the twelfth valve port is connected to the inlet of the ink sac via a pipeline. The fourth valve includes a seventh state and an eighth state, and the fifth valve includes a ninth state and a tenth state. When the fourth valve is in the seventh state and the fifth valve is in the ninth state, the pipeline between the ink storage container and the ink sac is blocked, and the pipeline between the cleaning fluid container and the ink sac is open. When the fourth valve is in the eighth state and the fifth valve is in the ninth state, the pipeline between the ink storage container and the ink sac is open, and the pipeline between the cleaning fluid container and the ink sac is blocked.

[0015] According to some embodiments of this application, the number of ink storage containers and the number of ink bladders are both multiple, with each of the multiple ink storage containers and the multiple ink bladders corresponding one-to-one. The corresponding ink storage containers and ink bladders cooperate to form a set of ink delivery modules. The control valve assembly can individually control the opening and closing of the pipeline between the ink storage container and the ink bladder in each set of ink delivery modules, and the control valve assembly can also individually control the opening and closing of the pipeline between the cleaning fluid container and each ink bladder.

[0016] The printhead cleaning method according to a second aspect of this application, applied to the printer of the above embodiment, includes a printhead cleaning stage and a pre-printing stage: The printhead cleaning stage includes: The printhead is connected to the ink stack assembly; The control valve assembly controls the sealing of the pipeline between the ink storage container and the ink bladder, and controls the opening of the pipeline between the cleaning fluid container and the ink bladder; The pump is turned on to pump the cleaning fluid in the cleaning fluid container into the ink sac, the printhead, the ink stack assembly and the waste liquid container in sequence; The pre-printing stage includes: The printhead is connected to the ink stack assembly; The control valve assembly controls the opening of the pipeline between the ink storage container and the ink bladder, and controls the sealing of the pipeline between the cleaning fluid container and the ink bladder; The pump is turned on to pump the ink in the ink storage container into the ink sac, the printhead, the ink stack assembly, and the waste liquid container in sequence.

[0017] The printhead cleaning method according to the embodiments of this application has at least the following beneficial effects: In the printhead cleaning method of this application, when the printer is in the printhead cleaning stage, the printhead is connected to the ink stack assembly, the control valve assembly controls the sealing of the pipeline between the ink reservoir and the ink sac, and controls the opening of the pipeline between the cleaning fluid container and the ink sac (the second valve is in the third state, and the third valve is in the fifth state), the pump body is turned on to pump the cleaning fluid in the cleaning fluid container into the ink sac, printhead, ink stack assembly, and waste liquid container in sequence. It can be understood that when the printer is in the printhead cleaning stage, under the action of the pump body, the cleaning fluid in the cleaning fluid container is pumped into the ink sac, printhead, ink stack assembly, and waste liquid container in sequence, thereby cleaning the ink sac and printhead. This method can achieve complete cleaning of the ink sac and printhead, that is, it can ensure that there is no ink residue inside the ink sac and printhead, thereby preventing the ink sac and printhead from being blocked by solidified ink, and improving the problem of ink clogging caused by power failure when the printer is not used for a long time. When the printer is in the pre-print stage, the printhead engages with the ink stack assembly. The control valve assembly controls the flow of the tubing between the ink reservoir and the ink cartridge, and controls the blockage of the tubing between the cleaning fluid container and the ink cartridge (the second valve is in the fourth position, and the third valve is in the fifth or sixth position). The pump activates, sequentially pumping ink from the ink reservoir into the ink cartridge, printhead, ink stack assembly, and waste fluid container. Essentially, during the pre-print stage, the pump sequentially pumps ink from the ink reservoir into the ink cartridge, printhead, ink stack assembly, and waste fluid container, thus using the ink to remove the cleaning fluid from the ink cartridge and printhead, preventing the cleaning fluid from affecting print quality.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the printer according to Embodiment 1 of this application; Figure 2 This is a schematic diagram of the printer according to Embodiment 2 of this application; Figure 3 This is a partial structural diagram of the printer according to Embodiment 2 of this application; Figure 4 This is another partial structural diagram of the printer according to Embodiment 2 of this application; Figure 5 for Figure 4 Side view of the figure shown; Figure 6 This is an assembly diagram of the ink storage container, cleaning fluid container, and waste liquid container according to Embodiment 2 of this application; Figure 7This is an assembly diagram of the control valve assembly and the flow divider according to Embodiment 2 of this application; Figure 8 This is a schematic diagram of the printer according to Embodiment 3 of this application.

[0020] Icon labels: 100. Ink storage container; 200. Cleaning solution container; 300. Waste liquid containers; 400. Ink cartridge; 500, Printhead; 600. Ink stack assembly; 610. Ink suction nozzle; 700. Pump body; 800. Control valve assembly; 810. First valve; 820. Second valve; 830. Third valve; 840. Fourth valve; 850. Fifth valve; 900, Diverter. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] Example 1 like Figure 1 As shown, the printer provided in Embodiment 1 of this application includes an ink storage container 100, a cleaning fluid container 200, a waste liquid container 300, an ink sac 400, a printhead 500, an ink stack assembly 600, a pump body 700, and a control valve assembly 800.

[0025] like Figure 1 As shown, the ink reservoir 100, ink sac 400, and printhead 500 are connected in sequence via tubing.

[0026] Specifically, the ink reservoir 100 is connected to the ink sac 400 via tubing, and the ink sac 400 is connected to the printhead 500 via tubing. The ink reservoir 100 stores ink, and the ink sac 400 also stores ink. The ink sac 400 controls the ink flow rate to ensure uniform ink output from the printhead 500, enabling the printhead 500 to print corresponding text or images on a medium (paper, cloth, etc.). Understandably, in some cases, the ink in the ink reservoir 100 can flow into the ink sac 400 and then into the printhead 500, allowing the printhead 500 to print the corresponding text or images on the medium.

[0027] like Figure 1 As shown, the cleaning fluid container 200 is connected to the ink cartridge 400 via tubing, wherein the cleaning fluid container 200 is used to store the cleaning fluid. It is understood that, in some cases, the cleaning fluid in the cleaning fluid container 200 can flow to the ink cartridge 400 and then into the printhead 500.

[0028] It should be noted that the two components can be connected by a pipe, and other components can also be installed on the pipe used to connect the two components.

[0029] Combination Figure 1 and Figure 5 When the printhead 500 is docked with the ink stack assembly 600, it is connected to the ink stack assembly 600. It can be understood that the printhead 500 is a movable part, and the ink stack assembly 600 is also a movable part. The ink stack assembly 600 has an ink suction nozzle 610. The printhead 500 can move to a position opposite to the ink suction nozzle 610. After the printhead 500 moves to a position opposite to the ink suction nozzle 610, the ink stack assembly 600 can move toward the printhead 500 so that the ink suction nozzle 610 docks with the printhead 500, thereby making the ink suction nozzle 610 connected to the printhead 500.

[0030] like Figure 1As shown, the ink stack assembly 600 and the waste liquid container 300 are connected by pipelines. The waste liquid container 300 is used to store waste liquid, and the waste liquid in the ink stack assembly 600 can flow into the waste liquid container 300. It should be noted that the waste liquid can be ink entering the ink stack assembly 600, cleaning fluid entering the ink stack assembly 600, or a mixture of ink and cleaning fluid entering the ink stack assembly 600.

[0031] like Figure 1 As shown, the control valve assembly 800 can control the opening and closing of the pipeline between the ink storage container 100 and the ink sac 400, and the control valve assembly 800 can also control the opening and closing of the pipeline between the cleaning fluid container 200 and the ink sac 400.

[0032] Specifically, the control valve assembly 800 includes a first valve 810, which is disposed on the pipeline between the ink storage container 100 and the ink sac 400, and is also disposed on the pipeline between the cleaning fluid container 200 and the ink sac 400. It can be understood that the pipeline between the ink storage container 100 and the ink sac 400 can be blocked or opened by the control of the first valve 810, and the pipeline between the cleaning fluid container 200 and the ink sac 400 can also be blocked or opened by the control of the first valve 810.

[0033] The first valve 810 includes a first state and a second state. When the first valve 810 is in the first state, the pipeline between the ink storage container 100 and the ink sac 400 is blocked, and the pipeline between the cleaning fluid container 200 and the ink sac 400 is open. When the first valve 810 is in the second state, the pipeline between the ink storage container 100 and the ink sac 400 is open, and the pipeline between the cleaning fluid container 200 and the ink sac 400 is blocked.

[0034] Specifically, the first valve 810 is a three-way valve, which has a first valve port, a second valve port and a third valve port. The ink outlet of the ink storage container 100 is connected to the first valve port of the first valve 810 through a pipeline. The second valve port of the first valve 810 is connected to the inlet of the ink sac 400 through a pipeline. The liquid outlet of the cleaning fluid container 200 is connected to the third valve port of the first valve 810 through a pipeline.

[0035] More specifically, when the first valve 810 is in the first state, its first valve port is closed, and its second and third valve ports are open. At this time, the pipeline between the ink storage container 100 and the ink bladder 400 is blocked, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is open. When the first valve 810 is in the second state, its first and second valve ports are open, and its third valve port is closed. At this time, the pipeline between the ink storage container 100 and the ink bladder 400 is open, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is blocked.

[0036] When the printhead 500 is connected to the ink stack assembly 600 and the first valve 810 is in the first state, the pump body 700 opens and can sequentially pump the cleaning fluid in the cleaning fluid container 200 into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300; when the printhead 500 is connected to the ink stack assembly 600 and the first valve 810 is in the second state, the pump body 700 opens and can sequentially pump the ink in the ink storage container 100 into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300.

[0037] like Figure 1 As shown, in specific embodiment one, the pump body 700 is installed on the pipeline between the ink stack assembly 600 and the waste liquid container 300. Of course, in other embodiments, the pump body 700 can also be installed on the pipeline between the first valve 810 and the ink sac 400.

[0038] It should be noted that the printer described in this application includes a printhead cleaning stage and a pre-printing stage performed after the printhead cleaning stage.

[0039] When the printer is in the printhead cleaning stage, the printhead 500 is connected to the ink stack assembly 600, the control valve assembly 800 controls the blockage of the pipeline between the ink storage container 100 and the ink bladder 400, and controls the opening of the pipeline between the cleaning fluid container 200 and the ink bladder 400 (the first valve 810 is in the first state), and the pump body 700 is turned on to pump the cleaning fluid in the cleaning fluid container 200 into the ink bladder 400, printhead 500, ink stack assembly 600 and waste liquid container 300 in sequence. Understandably, when the printer is in the printhead cleaning stage, the cleaning fluid in the cleaning fluid container 200 is pumped sequentially into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300 under the action of the pump body 700, thereby cleaning the ink sac 400 and printhead 500. This method can achieve complete cleaning of the ink sac 400 and printhead 500, that is, it can ensure that there is no ink residue inside the ink sac 400 and printhead 500, thereby preventing the ink sac 400 and printhead 500 from being blocked by solidified ink, and improving the problem of ink clogging caused by power failure when the printer is not used for a long time.

[0040] When the printer is in the pre-printing stage, the print head 500 is connected to the ink stack assembly 600. The control valve assembly 800 controls the connection between the ink reservoir 100 and the ink bladder 400, and controls the blockage between the cleaning fluid container 200 and the ink bladder 400 (the first valve 810 is in the second state). The pump body 700 is turned on to pump the ink in the ink reservoir 100 sequentially into the ink bladder 400, print head 500, ink stack assembly 600, and waste fluid container 300. It can be understood that when the printer is in the pre-printing stage, under the action of the pump body 700, the ink in the ink reservoir 100 is sequentially pumped into the ink bladder 400, print head 500, ink stack assembly 600, and waste fluid container 300, thereby using the ink to remove the cleaning fluid from the ink bladder 400 and print head 500, preventing the cleaning fluid from affecting print quality.

[0041] Understandably, once the printer's pre-printing stage is complete, the print head 500 can be separated from the ink stack assembly 600 to perform the printing task.

[0042] like Figure 1 As shown, it should be noted that there are multiple ink storage containers 100 and multiple ink bladders 400. The multiple ink storage containers 100 and multiple ink bladders 400 correspond one-to-one. The corresponding ink storage containers 100 and ink bladders 400 cooperate to form a set of ink delivery modules. The control valve assembly 800 can individually control the opening and closing of the pipeline between the ink storage container 100 and the ink bladder 400 in each set of ink delivery modules. In addition, the control valve assembly 800 can also individually control the opening and closing of the pipeline between the cleaning fluid container 200 and each ink bladder 400.

[0043] Specifically, there are multiple first valves 810. Each ink delivery module has a first valve 810 installed on the pipeline between the ink storage container 100 and the ink sac 400. The first valve 810 on the pipeline between the ink storage container 100 and the ink sac 400 in each ink delivery module is also located on the pipeline between the ink sac 400 and the cleaning fluid container 200 in that ink delivery module.

[0044] More specifically, when the printer is in the printhead cleaning stage, the pipeline between the ink storage container 100 and the ink bladder 400 in each ink delivery module is blocked by each first valve 810, and the pipeline between the cleaning fluid container 200 and each ink bladder 400 is open by each first valve 810; when the printer is in the pre-printing stage, the pipeline between the ink storage container 100 and the ink bladder 400 in each ink delivery module is open by each first valve 810, and the pipeline between the cleaning fluid container 200 and each ink bladder 400 is blocked by the first valve 810.

[0045] Example 2 like Figures 2 to 7As shown, the printer involved in Embodiment 2 of this application includes an ink storage container 100, a cleaning fluid container 200, a waste liquid container 300, an ink sac 400, a printhead 500, an ink stack assembly 600, a pump body 700, and a control valve assembly 800.

[0046] like Figure 2 As shown, the ink reservoir 100, ink sac 400, and printhead 500 are connected in sequence via tubing.

[0047] Specifically, the ink reservoir 100 is connected to the ink sac 400 via tubing, and the ink sac 400 is connected to the printhead 500 via tubing. The ink reservoir 100 stores ink, and the ink sac 400 also stores ink. The ink sac 400 controls the ink flow rate to ensure uniform ink output from the printhead 500, enabling the printhead 500 to print corresponding text or images on a medium (paper, cloth, etc.). Understandably, in some cases, the ink in the ink reservoir 100 can flow into the ink sac 400 and then into the printhead 500, allowing the printhead 500 to print the corresponding text or images on the medium.

[0048] like Figure 2 As shown, the cleaning fluid container 200 is connected to the ink cartridge 400 via tubing, wherein the cleaning fluid container 200 is used to store the cleaning fluid. It is understood that, in some cases, the cleaning fluid in the cleaning fluid container 200 can flow to the ink cartridge 400 and then into the printhead 500.

[0049] It should be noted that the two components can be connected by a pipe, and other components can also be installed on the pipe used to connect the two components.

[0050] Please refer to Figures 2 to 5 When the printhead 500 is docked with the ink stack assembly 600, it is connected to the ink stack assembly 600. It can be understood that the printhead 500 is a movable part, and the ink stack assembly 600 is also a movable part. The ink stack assembly 600 has an ink suction nozzle 610. The printhead 500 can move to a position opposite to the ink suction nozzle 610. After the printhead 500 moves to a position opposite to the ink suction nozzle 610, the ink stack assembly 600 can move toward the printhead 500 so that the ink suction nozzle 610 docks with the printhead 500, thereby making the ink suction nozzle 610 connected to the printhead 500.

[0051] like Figure 2As shown, the ink stack assembly 600 and the waste liquid container 300 are connected by pipelines. The waste liquid container 300 is used to store waste liquid, and the waste liquid in the ink stack assembly 600 flows to the waste liquid container 300. It should be noted that the waste liquid can be ink entering the ink stack assembly 600, cleaning fluid entering the ink stack assembly 600, or a mixture of ink and cleaning fluid entering the ink stack assembly 600.

[0052] like Figure 2 As shown, the control valve assembly 800 can control the opening and closing of the pipeline between the ink storage container 100 and the ink sac 400, and the control valve assembly 800 can also control the opening and closing of the pipeline between the cleaning fluid container 200 and the ink sac 400.

[0053] Combination Figure 2 and Figure 7 Specifically, the control valve assembly 800 includes a second valve 820 and a third valve 830. The second valve 820 is disposed on the pipeline between the ink storage container 100 and the ink sac 400, and is also disposed on the pipeline between the cleaning fluid container 200 and the ink sac 400. The third valve 830 is disposed on the pipeline between the cleaning fluid container 200 and the second valve 820. It can be understood that the pipeline between the ink storage container 100 and the ink sac 400 can be blocked or opened under the control of the second valve 820, the pipeline between the cleaning fluid container 200 and the second valve 820 can be blocked or opened under the control of the third valve 830, and the pipeline between the cleaning fluid container 200 and the ink sac 400 can be blocked or opened under the combined control of the second valve 820 and the third valve 830.

[0054] The second valve 820 includes a third and a fourth state, and the third valve 830 includes a fifth and a sixth state. When the second valve 820 is in the third state and the third valve 830 is in the fifth state, the pipeline between the ink storage container 100 and the ink bladder 400 is blocked, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is open. When the second valve 820 is in the fourth state, regardless of whether the third valve 830 is in the fifth or sixth state, the pipeline between the ink storage container 100 and the ink bladder 400 is open, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is blocked.

[0055] Specifically, the second valve 820 is a three-way valve with a fourth, fifth, and sixth valve port. The ink outlet of the ink storage container 100 is connected to the fourth valve port of the second valve 820 via a pipeline, and the fifth valve port of the second valve 820 is connected to the inlet of the ink sac 400 via a pipeline. The third valve 830 is a two-way valve with a seventh and eighth valve port. The outlet of the cleaning fluid container 200 is connected to the seventh valve port of the third valve 830 via a pipeline, and the eighth valve port of the third valve 830 is connected to the sixth valve port of the second valve 820 via a pipeline.

[0056] More specifically, when the second valve 820 is in the third state, its fourth valve port is closed, and its fifth and sixth valve ports are open. When the third valve 830 is in the fifth state, its seventh and eighth valve ports are connected. At this time, the pipeline between the ink storage container 100 and the ink bladder 400 is blocked, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is connected. When the second valve 820 is in the fourth state, its fourth and fifth valve ports are open, and its sixth valve port is closed. Regardless of whether the third valve 830 is in the fifth or sixth state, the pipeline between the ink storage container 100 and the ink bladder 400 is connected, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is blocked.

[0057] When the printhead 500 is connected to the ink stack assembly 600, and the second valve 820 is in the third state and the third valve 830 is in the fifth state, the pump body 700, when turned on, can sequentially pump the cleaning fluid in the cleaning fluid container 200 into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300; when the printhead 500 is connected to the ink stack assembly 600, and the second valve 820 is in the fourth state, regardless of whether the third valve 830 is in the fifth or sixth state, the pump body 700, when turned on, can sequentially pump the ink in the ink storage container 100 into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300.

[0058] In the second embodiment, the pump body 700 is installed on the pipeline between the ink stack assembly 600 and the waste liquid container 300. Of course, in other embodiments, the pump body 700 can also be installed on the pipeline between the first valve 810 and the ink sac 400.

[0059] It should be noted that the printer described in this application includes a printhead cleaning stage and a pre-printing stage performed after the printhead cleaning stage.

[0060] When the printer is in the printhead cleaning stage, the printhead 500 is connected to the ink stack assembly 600, the control valve assembly 800 controls the blockage of the pipeline between the ink storage container 100 and the ink bladder 400, and controls the opening of the pipeline between the cleaning fluid container 200 and the ink bladder 400 (the second valve 820 is in the third state, and the third valve 830 is in the fifth state), and the pump body 700 is turned on to pump the cleaning fluid in the cleaning fluid container 200 into the ink bladder 400, printhead 500, ink stack assembly 600 and waste liquid container 300 in sequence. Understandably, when the printer is in the printhead cleaning stage, the cleaning fluid in the cleaning fluid container 200 is pumped sequentially into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300 under the action of the pump body 700, thereby cleaning the ink sac 400 and printhead 500. This method can achieve complete cleaning of the ink sac 400 and printhead 500, that is, it can ensure that there is no ink residue inside the ink sac 400 and printhead 500, thereby preventing the ink sac 400 and printhead 500 from being blocked by solidified ink, and improving the problem of ink clogging caused by power failure when the printer is not used for a long time.

[0061] When the printer is in the pre-printing stage, the printhead 500 connects to the ink stack assembly 600. The control valve assembly 800 controls the connection between the ink reservoir 100 and the ink bladder 400, and controls the blockage between the cleaning fluid container 200 and the ink bladder 400 (the second valve 820 is in the fourth position, and the third valve 830 is in the fifth or sixth position). The pump 700 is activated to pump the ink from the ink reservoir 100 sequentially into the ink bladder 400, printhead 500, ink stack assembly 600, and waste fluid container 300. It can be understood that when the printer is in the pre-printing stage, under the action of the pump 700, the ink from the ink reservoir 100 is sequentially pumped into the ink bladder 400, printhead 500, ink stack assembly 600, and waste fluid container 300, thereby using the ink to remove the cleaning fluid from the ink bladder 400 and printhead 500, preventing the cleaning fluid from affecting print quality.

[0062] Understandably, once the printer's pre-printing stage is complete, the print head 500 can then separate from the ink stack assembly 600 to perform the printing task.

[0063] It should be noted that when the printer is in the pre-printing stage, the third valve 830 is in the sixth state, which can prevent the cleaning fluid in the cleaning fluid container 200 from flowing to the second valve 820, thereby further reducing the risk that the cleaning fluid will flow to the ink sac 400 and cause the ink to be mixed with cleaning fluid during the printing process, thus affecting the print quality.

[0064] like Figure 2As shown, it should be noted that there are multiple ink storage containers 100 and multiple ink bladders 400. The multiple ink storage containers 100 and multiple ink bladders 400 correspond one-to-one. The corresponding ink storage containers 100 and ink bladders 400 cooperate to form a set of ink delivery modules. The control valve assembly 800 can individually control the opening and closing of the pipeline between the ink storage container 100 and the ink bladder 400 in each set of ink delivery modules. In addition, the control valve assembly 800 can also individually control the opening and closing of the pipeline between the cleaning fluid container 200 and each ink bladder 400.

[0065] Specifically, there are multiple second valves 820. A second valve 820 is provided on the pipeline between the ink storage container 100 and the ink sac 400 in each ink delivery module. The second valve 820 on the pipeline between the ink storage container 100 and the ink sac 400 in each ink delivery module is also located on the pipeline between the ink sac 400 and the cleaning fluid container 200 in that ink delivery module. A third valve 830 is provided on the pipeline between the cleaning fluid container 200 and each second valve 820.

[0066] More specifically, when the printer is in the printhead cleaning stage, the pipeline between the ink storage container 100 and the ink bladder 400 in each ink delivery module is blocked by each second valve 820, and the pipeline between the cleaning fluid container 200 and each ink bladder 400 is open by each second valve 820 and the third valve 830; when the printer is in the pre-printing stage, the pipeline between the ink storage container 100 and the ink bladder 400 in each ink delivery module is open by each second valve 820, and the pipeline between the cleaning fluid container 200 and each ink bladder 400 is blocked by the second valve 820 and / or the third valve 830.

[0067] Furthermore, the third valve 830 is connected to a diverter 900, which is connected to each of the second valves 820. When the third valve 830 is in the open state (i.e., when the third valve 830 is in the fifth state), the diverter 900 can divert the cleaning fluid from the third valve 830 to each of the second valves 820.

[0068] Example 3 like Figure 8 As shown, the printer involved in Embodiment 3 of this application includes an ink storage container 100, a cleaning fluid container 200, a waste liquid container 300, an ink sac 400, a printhead 500, an ink stack assembly 600, a pump body 700, and a control valve assembly 800.

[0069] like Figure 8 As shown, the ink reservoir 100, ink sac 400, and printhead 500 are connected in sequence via tubing.

[0070] Specifically, the ink reservoir 100 is connected to the ink sac 400 via tubing, and the ink sac 400 is connected to the printhead 500 via tubing. The ink reservoir 100 stores ink, and the ink sac 400 also stores ink. The ink sac 400 controls the ink flow rate to ensure uniform ink output from the printhead 500, enabling the printhead 500 to print corresponding text or images on a medium (paper, cloth, etc.). Understandably, in some cases, the ink in the ink reservoir 100 can flow into the ink sac 400 and then into the printhead 500, allowing the printhead 500 to print the corresponding text or images on the medium.

[0071] like Figure 8 As shown, the cleaning fluid container 200 is connected to the ink cartridge 400 via tubing, wherein the cleaning fluid container 200 is used to store the cleaning fluid. It is understood that, in some cases, the cleaning fluid in the cleaning fluid container 200 can flow to the ink cartridge 400 and then into the printhead 500.

[0072] It should be noted that the two components can be connected by a pipe, and other components can also be installed on the pipe used to connect the two components.

[0073] Combination Figure 5 and Figure 8 When the printhead 500 is docked with the ink stack assembly 600, it is connected to the ink stack assembly 600. It can be understood that the printhead 500 is a movable part, and the ink stack assembly 600 is also a movable part. The ink stack assembly 600 has an ink suction nozzle 610. The printhead 500 can move to a position opposite to the ink suction nozzle 610. After the printhead 500 moves to a position opposite to the ink suction nozzle 610, the ink stack assembly 600 can move toward the printhead 500 so that the ink suction nozzle 610 docks with the printhead 500, thereby making the ink suction nozzle 610 connected to the printhead 500.

[0074] like Figure 8 As shown, the ink stack assembly 600 and the waste liquid container 300 are connected by pipelines. The waste liquid container 300 is used to store waste liquid, and the waste liquid in the ink stack assembly 600 can flow into the waste liquid container 300. It should be noted that the waste liquid can be ink entering the ink stack assembly 600, cleaning fluid entering the ink stack assembly 600, or a mixture of ink and cleaning fluid entering the ink stack assembly 600.

[0075] like Figure 8 As shown, the control valve assembly 800 can control the opening and closing of the pipeline between the ink storage container 100 and the ink sac 400, and the control valve assembly 800 can also control the opening and closing of the pipeline between the cleaning fluid container 200 and the ink sac 400.

[0076] Specifically, the control valve assembly 800 includes a fourth valve 840 and a fifth valve 850. The fourth valve 840 is disposed on the pipeline between the ink storage container 100 and the ink sac 400 and is used to control the opening and closing of the pipeline between the ink storage container 100 and the ink sac 400. The fifth valve 850 is disposed on the pipeline between the cleaning fluid container 200 and the ink sac 400 and is used to control the opening and closing of the pipeline between the cleaning fluid container 200 and the ink sac 400.

[0077] The fourth valve 840 includes a seventh state and an eighth state, and the fifth valve 850 includes a ninth state and a tenth state. When the fourth valve 840 is in the seventh state and the fifth valve 850 is in the ninth state, the pipeline between the ink storage container 100 and the ink bladder 400 is blocked, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is open. When the fourth valve 840 is in the eighth state and the fifth valve 850 is in the ninth state, the pipeline between the ink storage container 100 and the ink bladder 400 is open, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is blocked.

[0078] Specifically, the fourth valve 840 is a two-way valve with a ninth and a tenth valve port. The ink outlet of the ink storage container 100 is connected to the ninth valve port of the fourth valve 840 via a pipeline, and the tenth valve port of the fourth valve 840 is connected to the inlet of the ink sac 400 via a pipeline. The fifth valve 850 is a two-way valve with an eleventh and a twelfth valve port. The liquid outlet of the cleaning fluid container 200 is connected to the eleventh valve port of the fifth valve 850 via a pipeline, and the twelfth valve port of the fifth valve 850 is connected to the inlet of the ink sac 400 via a pipeline.

[0079] More specifically, when the fourth valve 840 is in the seventh state, its ninth and tenth valve ports are blocked; when the fifth valve 850 is in the ninth state, its eleventh and twelfth valve ports are open. At this time, the pipeline between the ink storage container 100 and the ink bladder 400 is blocked, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is open. When the fourth valve 840 is in the eighth state, its ninth and tenth valve ports are open; when the fifth valve 850 is in the tenth state, its eleventh and twelfth valve ports are blocked. At this time, the pipeline between the ink storage container 100 and the ink bladder 400 is open, while the pipeline between the cleaning fluid container 200 and the ink bladder 400 is blocked.

[0080] When the printhead 500 is connected to the ink stack assembly 600, and when the fourth valve 840 is in the seventh state and the fifth valve 850 is in the ninth state, the pump body 700 is turned on, which can sequentially pump the cleaning fluid in the cleaning fluid container 200 into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300; when the printhead 500 is connected to the ink stack assembly 600, and when the fourth valve 840 is in the eighth state and the fifth valve 850 is in the tenth state, the pump body 700 is turned on, which can sequentially pump the ink in the ink storage container 100 into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300.

[0081] Specifically, in Embodiment 3, the pump body 700 is installed on the pipeline between the ink stack assembly 600 and the waste liquid container 300. Of course, in other embodiments, the pump body 700 can also be installed on the pipeline between the first valve 810 and the ink sac 400.

[0082] It should be noted that the printer described in this application includes a printhead cleaning stage and a pre-printing stage performed after the printhead cleaning stage.

[0083] When the printer is in the printhead cleaning stage, the printhead 500 is connected to the ink stack assembly 600, the control valve assembly 800 controls the blockage of the pipeline between the ink storage container 100 and the ink bladder 400, and controls the opening of the pipeline between the cleaning fluid container 200 and the ink bladder 400 (the fourth valve 840 is in the seventh state, and the fifth valve 850 is in the ninth state), and the pump body 700 is turned on to pump the cleaning fluid in the cleaning fluid container 200 into the ink bladder 400, printhead 500, ink stack assembly 600 and waste liquid container 300 in sequence. Understandably, when the printer is in the printhead cleaning stage, the cleaning fluid in the cleaning fluid container 200 is pumped sequentially into the ink sac 400, printhead 500, ink stack assembly 600, and waste liquid container 300 under the action of the pump body 700, thereby cleaning the ink sac 400 and printhead 500. This method can achieve complete cleaning of the ink sac 400 and printhead 500, that is, it can ensure that there is no ink residue inside the ink sac 400 and printhead 500, thereby preventing the ink sac 400 and printhead 500 from being blocked by solidified ink, and improving the problem of ink clogging caused by power failure when the printer is not used for a long time.

[0084] When the printer is in the pre-printing stage, the print head 500 is connected to the ink stack assembly 600. The control valve assembly 800 controls the connection between the ink reservoir 100 and the ink bladder 400, and controls the blockage between the cleaning fluid container 200 and the ink bladder 400 (the fourth valve 840 is in the eighth state, and the fifth valve 850 is in the tenth state). The pump body 700 is activated to pump the ink in the ink reservoir 100 sequentially into the ink bladder 400, print head 500, ink stack assembly 600, and waste fluid container 300. It can be understood that when the printer is in the pre-printing stage, under the action of the pump body 700, the ink in the ink reservoir 100 is sequentially pumped into the ink bladder 400, print head 500, ink stack assembly 600, and waste fluid container 300, thereby using the ink to remove the cleaning fluid from the ink bladder 400 and print head 500, preventing the cleaning fluid from affecting print quality.

[0085] Understandably, once the printer's pre-printing stage is complete, the print head 500 can then separate from the ink stack assembly 600 to perform the printing task.

[0086] like Figure 8 As shown, it should be noted that there are multiple ink storage containers 100 and multiple ink bladders 400. The multiple ink storage containers 100 and multiple ink bladders 400 correspond one-to-one. The corresponding ink storage containers 100 and ink bladders 400 cooperate to form a set of ink delivery modules. The control valve assembly 800 can individually control the opening and closing of the pipeline between the ink storage container 100 and the ink bladder 400 in each set of ink delivery modules. In addition, the control valve assembly 800 can also individually control the opening and closing of the pipeline between the cleaning fluid container 200 and each ink bladder 400.

[0087] Specifically, there are multiple fourth valves 840. A fourth valve 840 is installed on the pipeline between the ink storage container 100 and the ink bladder 400 in each group of ink delivery modules. The fourth valve 840 is used to control the opening and closing of the pipeline between the ink storage container 100 and the ink bladder 400 in the corresponding group of ink delivery modules. A fifth valve 850 is installed on the pipeline between the cleaning fluid container 200 and each ink bladder 400. The fifth valve 850 is used to control the opening and closing of the pipeline between the cleaning fluid container 200 and each ink bladder 400.

[0088] More specifically, when the printer is in the printhead cleaning stage, the pipeline between the ink storage container 100 and the ink bladder 400 in each ink delivery module is blocked by the fourth valve 840, and the pipeline between the cleaning fluid container 200 and each ink bladder 400 is open by the fifth valve 850; when the printer is in the pre-printing stage, the pipeline between the ink storage container 100 and the ink bladder 400 in each ink delivery module is open by the fourth valve 840, and the pipeline between the cleaning fluid container 200 and each ink bladder 400 is blocked by the fifth valve 850.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A printer, characterized in that, This includes ink storage containers, cleaning fluid containers, waste liquid containers, ink bladders, printheads, ink stack assemblies, pump bodies, and control valve assemblies; The ink storage container, the ink sac, and the printhead are connected in sequence via pipes. The cleaning fluid container is connected to the ink sac via a pipe. The printhead communicates with the ink stack assembly when it docks with the ink stack assembly. The ink stack assembly and the waste liquid container are connected via pipes. The control valve assembly can control the opening and closing of the pipe between the ink storage container and the ink sac, and the control valve assembly can also control the opening and closing of the pipe between the cleaning fluid container and the ink sac. The printer includes a printhead cleaning stage and a pre-printing stage. During the printhead cleaning stage, the printhead is connected to the ink stack assembly. The control valve assembly controls the sealing of the tubing between the ink reservoir and the ink sac, and controls the opening of the tubing between the cleaning fluid container and the ink sac. The pump is activated to sequentially pump the cleaning fluid from the cleaning fluid container into the ink sac, the printhead, the ink stack assembly, and the waste liquid container. During the pre-printing stage, the printhead is connected to the ink stack assembly. The control valve assembly controls the opening of the tubing between the ink reservoir and the ink sac, and controls the sealing of the tubing between the cleaning fluid container and the ink sac. The pump is activated to sequentially pump the ink from the ink reservoir into the ink sac, the printhead, the ink stack assembly, and the waste liquid container.

2. The printer according to claim 1, characterized in that, The pump body is installed on the pipeline between the ink stack assembly and the waste liquid container.

3. The printer according to claim 1, characterized in that, The control valve assembly includes a first valve, which is disposed on the pipeline between the ink storage container and the ink sac, and the first valve is also disposed on the pipeline between the cleaning fluid container and the ink sac. When the printer is in the printhead cleaning stage, the pipeline between the ink reservoir and the ink sac is blocked by the first valve, and the pipeline between the cleaning fluid container and the ink sac is open by the first valve; when the printer is in the pre-printing stage, the pipeline between the ink reservoir and the ink sac is open by the first valve, and the pipeline between the cleaning fluid container and the ink sac is blocked by the first valve.

4. The printer according to claim 3, characterized in that, The first valve is a three-way valve, which has a first valve port, a second valve port and a third valve port. The ink outlet of the ink storage container is connected to the first valve port through a pipeline. The second valve port is connected to the inlet of the ink sac through a pipeline. The liquid outlet of the cleaning fluid container is connected to the third valve port through a pipeline. The first valve has a first state and a second state; when the first valve is in the first state, the pipeline between the ink storage container and the ink sac is blocked, and the pipeline between the cleaning fluid container and the ink sac is open; when the first valve is in the second state, the pipeline between the ink storage container and the ink sac is open, and the pipeline between the cleaning fluid container and the ink sac is blocked.

5. The printer according to claim 1, characterized in that, The control valve assembly includes a second valve and a third valve. The second valve is disposed on the pipeline between the ink storage container and the ink sac, and is also disposed on the pipeline between the cleaning fluid container and the ink sac; the third valve is disposed on the pipeline between the cleaning fluid container and the second valve. When the printer is in the printhead cleaning stage, the pipeline between the ink reservoir and the ink sac is blocked by the second valve, and the pipeline between the cleaning fluid container and the ink sac is open by the second valve and the third valve; when the printer is in the pre-printing stage, the pipeline between the ink reservoir and the ink sac is open by the second valve, and the pipeline between the cleaning fluid container and the ink sac is blocked by the second valve and / or the third valve.

6. The printer according to claim 5, characterized in that, The second valve is a three-way valve with a fourth, fifth, and sixth valve port. The ink outlet of the ink storage container is connected to the fourth valve port via a pipeline, and the fifth valve port is connected to the inlet of the ink sac via a pipeline. The third valve is a two-way valve with a seventh and eighth valve port. The liquid outlet of the cleaning fluid container is connected to the seventh valve port via a pipeline, and the eighth valve port is connected to the sixth valve port via a pipeline. The second valve includes a third state and a fourth state, and the third valve includes a fifth state and a sixth state; when the second valve is in the third state and the third valve is in the fifth state, the pipeline between the ink storage container and the ink sac is blocked, and the pipeline between the cleaning fluid container and the ink sac is open; when the second valve is in the fourth state, the pipeline between the ink storage container and the ink sac is open, and the pipeline between the cleaning fluid container and the ink sac is blocked.

7. The printer according to claim 1, characterized in that, The control valve assembly includes a fourth valve and a fifth valve. The fourth valve is disposed on the pipeline between the ink storage container and the ink sac, and the fifth valve is disposed on the pipeline between the cleaning fluid container and the ink sac. When the printer is in the printhead cleaning stage, the pipeline between the ink reservoir and the ink sac is blocked by the fourth valve, and the pipeline between the cleaning fluid container and the ink sac is open by the fifth valve; when the printer is in the pre-printing stage, the pipeline between the ink reservoir and the ink sac is open by the fourth valve, and the pipeline between the cleaning fluid container and the ink sac is blocked by the fifth valve.

8. The printer according to claim 7, characterized in that, The fourth valve is a two-way valve with a ninth valve port and a tenth valve port. The ink outlet of the ink storage container is connected to the ninth valve port through a pipeline, and the tenth valve port is connected to the inlet of the ink sac through a pipeline. The fifth valve is a two-way valve with an eleventh valve port and a twelfth valve port. The liquid outlet of the cleaning fluid container is connected to the eleventh valve port through a pipeline, and the twelfth valve port is connected to the inlet of the ink sac through a pipeline. The fourth valve includes a seventh state and an eighth state, and the fifth valve includes a ninth state and a tenth state. When the fourth valve is in the seventh state and the fifth valve is in the ninth state, the pipeline between the ink storage container and the ink sac is blocked, and the pipeline between the cleaning fluid container and the ink sac is open. When the fourth valve is in the eighth state and the fifth valve is in the ninth state, the pipeline between the ink storage container and the ink sac is open, and the pipeline between the cleaning fluid container and the ink sac is blocked.

9. The printer according to claim 1, characterized in that, The number of ink storage containers and the number of ink sacs are both multiple, with each of the multiple ink storage containers and multiple ink sacs corresponding one-to-one. The corresponding ink storage containers and ink sacs cooperate to form a set of ink delivery modules. The control valve assembly can individually control the opening and closing of the pipeline between the ink storage container and the ink sac in each set of ink delivery modules, and the control valve assembly can also individually control the opening and closing of the pipeline between the cleaning fluid container and each ink sac.

10. A printhead cleaning method, characterized in that, Applied to the printer according to any one of claims 1 to 9, the printhead cleaning method includes a printhead cleaning stage and a pre-printing stage: The printhead cleaning stage includes: The printhead is connected to the ink stack assembly; The control valve assembly controls the sealing of the pipeline between the ink storage container and the ink bladder, and controls the opening of the pipeline between the cleaning fluid container and the ink bladder; The pump is turned on to pump the cleaning fluid in the cleaning fluid container into the ink sac, the printhead, the ink stack assembly and the waste liquid container in sequence; The pre-printing stage includes: The printhead is connected to the ink stack assembly; The control valve assembly controls the opening of the pipeline between the ink storage container and the ink bladder, and controls the sealing of the pipeline between the cleaning fluid container and the ink bladder; The pump is turned on to pump the ink in the ink storage container into the ink sac, the printhead, the ink stack assembly, and the waste liquid container in sequence.

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