Moisturizing structure and moisturizing method of continuous ink-jet printer

Abstract

The invention relates to a moisturizing structure and a moisturizing method of a continuous ink-jet printer. The moisturizing structure and the moisturizing method solve the problem that the moisturizing mode of an existing ink-jet printer cannot meet the long-term moisturizing requirement of the continuous ink-jet printer. The device comprises an ink supply liquid storage barrel, a spray head and an ink outlet liquid storage barrel which are connected in sequence, in the flowing direction of the moisturizing liquid, the ink supply and storage barrel is connected with an ink inlet of the spray head through an ink inlet controller, an ink outlet of the spray head is connected with an ink outlet and storage barrel through an ink outlet controller, and the ink outlet and storage barrel is connected with the ink supply and storage barrel through a first circulation controller; the spray head is provided with a spray hole for ink-jet printing, and a liquid receiving disc is arranged below the spray hole. According to the method, ink of the continuous ink-jet printer is replaced with the moisturizing liquid, intermittent small-scale ink dripping of the spray head is controlled through the arrangement of moisturizing circulation, long-term effective moisturizing is conducted on the ink flow channel of the continuous ink-jet printer, ink residue curing and blocking of the flow channel and a spray hole are avoided, and the method is low in cost, good in moisturizing effect and easy to operate.

Description

Technical Field

[0001] This invention belongs to the field of inkjet printing technology, and specifically relates to a moisturizing structure and moisturizing method for a continuous inkjet printer. Background Technology

[0002] Inkjet printing is a printing technology that ejects ink droplets through a printhead onto a printing surface to form a printed pattern. Inkjet printing is low-cost and cost-effective, making it one of the most commonly used printing methods. In inkjet printing, ink flows through the printer's ink reservoir, ink supply lines, and printhead, eventually printing onto the printing surface. If an inkjet printer is not used for an extended period, the residual ink can evaporate and clog the printhead nozzles. It can also solidify and deposit in the ink channels, such as the ink reservoir and ink supply lines. When restarting the printer, this increased pressure in the channels can contaminate newly added ink, creating particulate impurities that can further clog the printhead nozzles.

[0003] The following are some common methods for moisturizing inkjet printers: 1. Moisturizing cap: This method uses a moisturizing cap to seal and moisturize the printhead. However, the drawback is that it is difficult to achieve a perfect seal, and ink will still evaporate and clog the nozzles after prolonged periods of inactivity. For multi-head printers, the installation structure of the moisturizing cap is complex and costly.

[0004] 2. Flash spray moisturizing: Periodically sprays short bursts of ink from all nozzles to remove ink that has become viscous due to evaporation. The disadvantage is that a small amount of dry ink remains after each flash spray, and this residue is more likely to accumulate in subsequent flash sprays, potentially causing misaligned ink flow over time. Furthermore, flash spray moisturizing is suitable for piezoelectric or foam-type pulse inkjet printers, but not for continuous inkjet printers.

[0005] 3. Apply a protective film to moisturize the printhead nozzles to prevent residual ink or moisture from evaporating. The disadvantage is that the application process is very complicated and it is difficult to ensure that the protective film is completely adhered and sealed each time.

[0006] 4. Refill with moisturizing solution. After printing, replace the ink with moisturizing solution. The traditional method of refilling with moisturizing solution involves cleaning the print head, refilling with replacement moisturizing solution, and then stopping the operation. This method cannot completely clean ink residue and impurities in the moisturizing solution, and there is still a risk of clogging after a long period of standing.

[0007] In conclusion, existing inkjet printer moisturizing methods still pose a risk of nozzle clogging after prolonged periods of inactivity, and in particular, cannot meet the long-term moisturizing needs of continuous inkjet printers. Summary of the Invention

[0008] This invention addresses the problem that existing inkjet printer moisturizing methods described in the background art cannot meet the long-term moisturizing needs of continuous inkjet printers. It provides a moisturizing structure and method for continuous inkjet printers, which uses a circulating moisturizing liquid to meet the long-term moisturizing needs of continuous inkjet printers.

[0009] The technical solution adopted by the present invention to solve its technical problem is: a moisturizing structure for a continuous inkjet printer, comprising an ink supply reservoir, a printhead, and an ink output reservoir connected in sequence. Along the flow direction of the moisturizing liquid: the ink supply reservoir is connected to the ink inlet of the printhead through the ink inlet controller, the ink outlet of the printhead is connected to the ink outlet reservoir through the ink outlet controller, and the ink outlet reservoir is connected to the ink supply reservoir through the first circulation controller. The printhead is equipped with inkjet printing nozzles, and a drip tray is provided below the nozzles.

[0010] The ink reservoir, printhead, and output ink reservoir in this device are the original structure of a continuous inkjet printer. When a continuous inkjet printer is stored unused for a long time, residual ink adhering to the flow channels will solidify and deposit, clogging the flow channels and causing poor flow. Moreover, when reused, this residual ink will become impurities in the new ink, causing printhead nozzle blockage. This device is suitable for long-term humidification of continuous inkjet printers. It replaces the ink in the printer with a humidifying fluid, uses a flow circulation method to reduce ink deposition and solidification, and uses intermittent ink dripping or spraying to ensure unobstructed printhead nozzles. The humidifying fluid can be filtered water, deionized water, ultrapure water, anhydrous alcohol, alcohol-water solution, anhydrous ethylene glycol, or ethylene glycol-water solution. It can also be a mixture of the above humidifying fluids and an antibacterial agent [Z1].

[0011] Preferably, the ink supply tank is a positive pressure tank or an atmospheric pressure tank connected to the atmosphere, the ink inlet controller is a valve or a pump, and the ink outlet controller and the first circulation controller are pumps or valves. A positive pressure ink supply tank utilizes pressure to provide ink supply power, and the ink inlet controller can be a non-powered valve, supplemented by a flow meter to control the valve flow. An atmospheric pressure ink supply tank utilizes a pump to provide ink supply power and controls the flow rate.

[0012] Preferably, the liquid receiving tray is connected to the ink supply tank via a second circulation controller, which is a pump or valve.

[0013] Preferably, the receiving tray is connected to the waste liquid tank via a waste discharge controller, which is a pump or valve.

[0014] Preferably, the ink reservoir is a negative pressure reservoir. The ink reservoir has a certain negative pressure. Since the nozzle diameter of an inkjet printer nozzle can reach the micrometer level, the liquid inside the nozzle needs a certain pressure to drip ink from the nozzle. When the flow rate at the ink supply end is low and the pressure is insufficient, both ink and moisturizing liquid will flow directly through the nozzle into the negative pressure ink reservoir, instead of dripping ink from the nozzle.

[0015] Preferably, the ink supply reservoir is also connected to a replenishment tank for adding humidifying liquid to the ink supply reservoir.

[0016] A moisturizing method for a continuous inkjet printer, using the aforementioned moisturizing structure, includes the following steps: S1, the ink supply tank is filled with humidifying solution; S2, Ink inlet controller, ink outlet controller, first cycle controller, second cycle controller, and waste discharge controller are in the off state by default; S3. Turn on the ink inlet controller to make the printhead drip ink, and continue for t1. S4. Turn off the ink inlet controller, and the printhead stops dripping ink for a duration of t2, which is more than ten times t1. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycles of steps S3-S4, the second cycle controller is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply reservoir, or the drain controller is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged into the waste liquid tank.

[0017] A moisturizing method for a continuous inkjet printer, using the aforementioned moisturizing structure, includes the following steps: S1, the ink supply tank and ink outlet tank are filled with moisturizing liquid; S2, Ink inlet controller, ink outlet controller, first cycle controller, second cycle controller, and waste discharge controller are in the off state by default; S3. Turn on the ink inlet controller and control the flow rate to Q1. Turn on the ink outlet controller and measure the flow rate to Q2. Q1>Q2, so the printhead drips ink for t3. Turn on the first cycle controller to keep the inlet and outlet flow rates of the ink reservoir balanced. S4. Turn off the ink inlet controller. The printhead stops dripping ink for a duration of t4, which is more than ten times t3. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycles of steps S3-S4, the second cycle controller is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply reservoir, or the drain controller is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged into the waste liquid tank.

[0018] A moisturizing method for a continuous inkjet printer, using the aforementioned moisturizing structure, includes the following steps: S1, the ink supply tank and ink outlet tank are filled with moisturizing liquid; S2, Ink inlet controller, ink outlet controller, first cycle controller, second cycle controller, and waste discharge controller are in the off state by default; S3. Turn on the ink inlet controller and control the flow rate to Q3. Turn on the ink outlet controller and measure the flow rate to Q4. Q3>Q4, causing the printhead to drip ink, continue for t5. S4. The ink inlet controller controls the flow rate to Q5. The ink outlet controller measures the flow rate to Q5, and the printhead stops dripping ink. The duration is t6, Q5. 阈 <Q3;Q 阈 The flow rate threshold for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on; the first cycle controller is turned on to keep the inlet and outlet flow rates of the ink reservoir balanced; t6 is more than ten times t5. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycles of steps S3-S4, the second cycle controller is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply reservoir, or the drain controller is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged into the waste liquid tank.

[0019] A moisturizing method for a continuous inkjet printer, comprising the above-mentioned moisturizing structure, includes the following steps: S1, the ink supply tank and ink outlet tank are filled with moisturizing liquid; S2, Ink inlet controller, ink outlet controller, first cycle controller, second cycle controller, and waste discharge controller are in the off state by default; S3. Turn on the ink inlet controller and control the flow rate to Q6, turn off the ink outlet controller, and make the printhead spray ink at high pressure for a duration of t7. S4. Turn on the ink inlet controller and control the flow rate to Q7. Turn on the ink outlet controller and measure the flow rate to Q8. Q7>Q8, causing the printhead to drip ink for t8. S5, the ink inlet controller controls the flow rate to Q8, the ink outlet controller measures the flow rate to Q8, the printhead stops dripping ink, duration t9, Q8 阈 <Q6;Q 阈 The flow rate threshold for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on; the first cycle controller is turned on to keep the inlet and outlet flow rates of the ink reservoir balanced; t9 is more than ten times t7; t9 is more than ten times t8. S6. Repeat steps S3, S4, and S5 until the next time the inkjet printer is used. ​​During the repeated cycles of steps S3-S5, the second cycle controller is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply reservoir, or the drain controller is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged into the waste liquid tank.

[0020] A moisturizing method for a continuous inkjet printer, using the aforementioned moisturizing structure, includes the following steps: S1, the ink supply tank and ink outlet tank are filled with moisturizing liquid; S2, Ink inlet controller, ink outlet controller, first cycle controller, second cycle controller, and waste discharge controller are in the off state by default; S3. Turn on the ink inlet controller and control the flow rate Q. 进 The flow rate gradually increases, the ink output controller is activated, and the flow rate Q measured by the ink output controller... 出 Q 出 With Q 进 Simultaneously increase until Q 出 进 At this point, the printhead changes from not dripping ink to starting to drip ink, and Q is marked at this time. 进 For Q 阈 ', when Q 阈 '>1.2 Q 阈 Enter S4, when Q 阈 <= 1.2 Q 阈 Skip S4 and proceed to S5; Q 阈 The critical flow rate for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on, as predicted by the printhead. S4. Turn on the ink inlet controller, set the flow rate to Q9, and turn off the ink outlet controller to enable high-pressure ink ejection from the printhead for a duration of t. 10 ; S5. Turn on the ink inlet controller and control the flow rate to Q. 10 Turn on the ink output controller and measure the flow rate as Q. 11 Q 10 Q 11 This causes the printhead to drip ink continuously for t 11 ; S6, Ink inlet controller controls the flow rate to Q. 12 The flow rate measured by the ink output controller is Q. 12 The printhead stops dripping ink for a duration of t. 12 Q 12 阈 ' 10 ;Activate the first cycle controller to maintain a balance between the inlet and outlet flow rates of the ink reservoir;t 12 For t 10 More than ten times; t 12 For t 11 More than ten times; ​​​S7. Repeat steps S3, S4, S5, and S6 until the next time the inkjet printer is used. During the repeated cycles of steps S3-S6, the second cycle controller is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply reservoir, or the drain controller is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged into the waste liquid tank.

[0021] In this invention, the moisturizing fluid in the drip tray from the printhead can either re-enter the moisturizing cycle or be discharged into the waste liquid bin. This can be configured according to actual needs. For example, when long-term moisturizing is required, the moisturizing fluid in the drip tray for the first 1-3 days is discharged into the waste liquid bin, and the moisturizing fluid thereafter re-enters the moisturizing cycle until the continuous inkjet printer is used again; for short-term moisturizing, all moisturizing fluid in the drip tray is discharged into the waste liquid bin.

[0022] This invention replaces the ink in a continuous inkjet printer with a moisturizing liquid. By setting a moisturizing cycle, it controls the printhead to drip ink intermittently in small amounts, effectively moisturizing the ink flow channels of the continuous inkjet printer for a long time, preventing ink residue from solidifying and clogging the flow channels and nozzles. This method is low in cost, has a good moisturizing effect, and is easy to operate. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of a moisturizing structure according to the present invention.

[0025] In the diagram: 100, printhead; 210, ink inlet controller; 220, ink outlet controller; 310, ink supply reservoir; 320, ink outlet reservoir; 330, waste liquid tank; 340, replenishment tank; 510, first circulation controller; 520, second circulation controller; 530, waste discharge controller. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0027] Example 1: A moisture retention structure for a continuous inkjet printer, such as Figure 1As shown, the system includes an ink supply reservoir 310, a printhead 100, and an ink outlet reservoir 320 connected in sequence. The ink supply reservoir 310, printhead 100, and ink outlet reservoir 320 are filled with a moisturizing liquid. Along the flow direction of the moisturizing liquid: the ink supply reservoir 310 is connected to the ink inlet of the printhead 100 via an ink inlet controller 210; the ink outlet of the printhead is connected to the ink outlet reservoir 320 via an ink outlet controller 220; and the ink outlet reservoir 320 is connected to the ink supply reservoir 310 via a first circulation controller 510. The printhead 100 is equipped with inkjet printing nozzles, and a drip tray 400 is located below the nozzles. The drip tray 400 is connected to the ink supply reservoir 310 via a second circulation controller 520. The drip tray 400 is connected to a waste liquid tank via a waste discharge controller 530. In this example, the ink inlet controller 210 is an infusion pump, and the ink outlet controller 220, the first circulation controller 510, the second circulation controller 520, and the waste discharge controller 530 can all be infusion pumps or valves. Specifically, the ink inlet controller 210 is an infusion pump with controllable flow rate, and the ink outlet controller 220 is equipped with a flow sensor. The ink outlet storage tank 320 is a negative pressure tank; when both the ink inlet controller 210 and the ink outlet controller 220 are activated, the flow rate of the ink inlet controller 210 is higher than Q. 阈 Ink begins to drip from the nozzle of printhead 100. The ink supply reservoir 310 is also connected to a replenishment tank 340 for replenishing the ink supply reservoir 310 with humidifying fluid.

[0028] Example 2: A moisturizing method for a small-cycle intermittent continuous inkjet printer, using the moisturizing structure of Example 1, includes the following steps: S1, the ink supply tank 310 is filled with humidifying liquid; S2, the ink inlet controller 210, ink outlet controller 220, first circulation controller 510, second circulation controller 520, and waste discharge controller 530 are in the off state by default; S3. Turn on the ink inlet controller 210 to make the printhead drip ink for 5-30 seconds; S4. Turn off the ink inlet controller 210. The printhead will stop dripping ink for 5-60 minutes. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S4, the second cycle controller 520 is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank 310, or the drain controller 530 is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank 330.

[0029] Example 3: A moisturizing method for a large-cycle intermittent continuous inkjet printer, using the moisturizing structure of Example 1, includes the following steps: S1, the ink supply tank 310 and the ink output tank 320 are filled with moisturizing liquid; S2, the ink inlet controller 210, ink outlet controller 220, first circulation controller 510, second circulation controller 520, and waste discharge controller 530 are in the off state by default; S3. Turn on the ink inlet controller 210 and set the flow rate to Q1. Turn on the ink outlet controller 220 and measure the flow rate to Q2. Q1 > Q2, and Q1 > Q2. 阈 Allow the printhead to drip ink for 5-30 seconds; Q 阈 The flow rate threshold for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on is predicted; the first cycle controller 510 is turned on to keep the inlet and outlet flow rates of the ink reservoir 320 balanced. S4. Turn off the ink inlet controller 210. The printhead will stop dripping ink for 5-60 minutes. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S4, the second cycle controller 520 is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank 310, or the drain controller 530 is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank 330.

[0030] Example 4: A moisturizing method for a large-cycle continuous inkjet printer, using the moisturizing structure of Example 1, includes the following steps: S1, the ink supply tank 310 and the ink output tank 320 are filled with moisturizing liquid; S2, the ink inlet controller 210, ink outlet controller 220, first circulation controller 510, second circulation controller 520, and waste discharge controller 530 are in the off state by default; S3. Turn on the ink inlet controller 210 and control the flow rate to Q3. Turn on the ink outlet controller 220 and measure the flow rate to Q4. Q3>Q4, causing the printhead to drip ink for 5-30 seconds. S4. The ink inlet controller 210 controls the flow rate to Q5. The ink outlet controller 220 measures the flow rate to Q5, and the printhead stops dripping ink for 5-60 minutes. 阈 <Q3;Q 阈 The flow rate threshold for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on is predicted; the first cycle controller 510 is turned on to keep the inlet and outlet flow rates of the ink reservoir 320 balanced. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S4, the second cycle controller 520 is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank 310, or the drain controller 530 is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank 330.

[0031] ​Example 5: A moisturizing method for a continuous inkjet printer with large and small cycle types, using the moisturizing structure of Example 1, including the following steps: S1, the ink supply tank 310 and the ink output tank 320 are filled with moisturizing liquid; S2, the ink inlet controller 210, ink outlet controller 220, first circulation controller 510, second circulation controller 520, and waste discharge controller 530 are in the off state by default; S3. Turn on the ink inlet controller 210 and control the flow rate to Q6, turn off the ink outlet controller 220, and make the printhead spray ink at high pressure for 5-30 seconds. S4. Turn on the ink inlet controller 210 and control the flow rate to Q7. Turn on the ink outlet controller 220 and measure the flow rate to Q8. Q7>Q8, causing the printhead to drip ink for 5-30 seconds. S5, the ink inlet controller 210 controls the flow rate to Q8, the ink outlet controller 220 measures the flow rate to Q8, the printhead stops dripping ink, and the duration is 5-60 minutes; Q8 阈 <Q6;Q 阈 The flow rate threshold for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on is predicted; the first cycle controller 510 is turned on to keep the inlet and outlet flow rates of the ink reservoir 320 balanced. S6. Repeat steps S3, S4, and S5 until the next time the inkjet printer is used. During the repeated cycles of steps S3-S5, the second cycle controller 520 is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank 310, or the drain controller 530 is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank 330.

[0032] Example 6: A moisturizing method for a feedback-based continuous inkjet printer, using the moisturizing structure of Example 1, includes the following steps: S1, the ink supply tank 310 and the ink output tank 320 are filled with moisturizing liquid; S2, the ink inlet controller 210, ink outlet controller 220, first circulation controller 510, second circulation controller 520, and waste discharge controller 530 are in the off state by default; S3. Turn on the ink inlet controller 210 and control the flow rate Q. 进 The flow rate gradually increases, the ink output controller 220 is turned on, and the flow rate Q measured by the ink output controller 220 is... 出 Q 出 With Q 进 Simultaneously increase until Q 出 进 At this point, the printhead changes from not dripping ink to starting to drip ink, and Q is marked at this time. 进 For Q 阈 ', when Q​​阈 '>1.2 Q 阈 Enter S4, when Q 阈 <= 1.2 Q 阈 Skip S4 and proceed to S5; Q 阈 The critical flow rate for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on, as predicted by the printhead. S4. Turn on the ink inlet controller 210, control the flow rate to Q9, and turn off the ink outlet controller 220 to make the printhead spray ink at high pressure for 5-30 seconds. S5. Turn on the ink inlet controller 210 and control the flow rate to Q. 10 Turn on the ink output controller 220 and measure the flow rate as Q. 11 Q 10 Q 11 This causes the printhead to drip ink, which continues for 5-30 seconds. S6, Ink inlet controller 210 controls the flow rate to Q. 12 The flow rate measured by the ink output controller 220 is Q. 12 The printhead stops dripping ink, lasting 5-60 minutes. (Q) 12 阈 ' 10 ;Activate the first cycle controller 510 to maintain a balance between the inlet and outlet flow rates of the ink reservoir 320; S7. Repeat steps S3, S4, S5, and S6 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S6, the second cycle controller 520 is intermittently activated to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank 310, or the drain controller 530 is intermittently activated to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank 330.

[0033] Other implementations include combinations of the cyclic methods described in Embodiments 2-6 of this application.

[0034] The more limitations are defined in the claims, the narrower the scope.

[0035] Therefore, if the moisturizing liquids mentioned here are all conventional moisturizing liquids, they do not contribute to the inventiveness of the invention and can be disregarded in adding claims. However, if there are unconventional moisturizing liquids, it is advisable to add claims.​​

Claims

1. A moisturizing structure for a continuous inkjet printer, comprising an ink supply reservoir (310), a printhead (100), and an ink output reservoir (320) connected in sequence, characterized in that: Along the flow direction of the moisturizing liquid: the ink supply reservoir (310) is connected to the ink inlet of the printhead (100) through the ink inlet controller (210), the ink outlet of the printhead is connected to the ink outlet reservoir (320) through the ink outlet controller (220), and the ink outlet reservoir (320) is connected to the ink supply reservoir (310) through the first circulation controller (510). The printhead (100) is provided with inkjet printing nozzles, and a liquid receiving tray (400) is provided below the nozzles.

2. The moisturizing structure of the continuous inkjet printer according to claim 1, characterized in that: The ink supply tank (310) is a positive pressure tank or an atmospheric pressure tank connected to the atmosphere. The ink inlet controller (210) is a valve or a pump. The ink outlet controller (220) and the first circulation controller (510) are pumps or valves.

3. The moisturizing structure of the continuous inkjet printer according to claim 1, characterized in that: The liquid receiving tray (400) is connected to the ink supply tank (310) via a second circulation controller (520), which is a pump or valve.

4. The moisturizing structure of the continuous inkjet printer according to claim 1, characterized in that: The receiving tray (400) is connected to the waste liquid tank via a waste discharge controller (530), which is a pump or valve.

5. The moisturizing structure of the continuous inkjet printer according to claim 1, characterized in that: The ink storage tank (320) is a negative pressure tank.

6. A moisturizing method for a continuous inkjet printer, characterized in that: Using the moisturizing structure according to any one of claims 1 to 5 includes the following steps: S1, the ink storage tank (310) is filled with moisturizing liquid; S2, the ink inlet controller (210), ink outlet controller (220), first cycle controller (510), second cycle controller (520), and waste discharge controller (530) are in the off state by default; S3. Turn on the ink feed controller (210) to make the printhead drip ink, and continue for t1. S4. Turn off the ink inlet controller (210), and the printhead stops dripping ink for a duration of t2, which is more than ten times t1. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S4, the second cycle controller (520) is intermittently turned on to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank (310), or the drain controller (530) is intermittently turned on to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank (330).

7. A moisturizing method for a continuous inkjet printer, characterized in that: Using the moisturizing structure according to any one of claims 1 to 5 includes the following steps: S1, the ink supply tank (310) and the ink output tank (320) are filled with moisturizing liquid; S2, the ink inlet controller (210), ink outlet controller (220), first cycle controller (510), second cycle controller (520), and waste discharge controller (530) are in the off state by default; S3. Turn on the ink inlet controller (210) and control the flow rate to Q1. Turn on the ink outlet controller (220) and measure the flow rate to Q2. Q1>Q2, so that the printhead drips ink for t3. Turn on the first cycle controller (510) to keep the inlet and outlet flow rates of the ink outlet reservoir (320) balanced. S4. Turn off the ink inlet controller (210), and the printhead stops dripping ink for a duration of t4, which is more than ten times t3. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S4, the second cycle controller (520) is intermittently turned on to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank (310), or the drain controller (530) is intermittently turned on to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank (330).

8. A method for moisturizing a continuous inkjet printer, characterized in that: Using the moisturizing structure according to any one of claims 1 to 5 includes the following steps: S1, the ink supply tank (310) and the ink output tank (320) are filled with moisturizing liquid; S2, the ink inlet controller (210), ink outlet controller (220), first cycle controller (510), second cycle controller (520), and waste discharge controller (530) are in the off state by default; S3. Turn on the ink inlet controller (210) and control the flow rate to Q3. Turn on the ink outlet controller (220) and measure the flow rate to Q4. Q3>Q4, so that the printhead drips ink for t5. S4. The ink inlet controller (210) controls the flow rate to Q5. The ink outlet controller (220) measures the flow rate to Q5, and the printhead stops dripping ink for a duration of t6. Q5 < Q 阈 <Q3;Q 阈 The critical flow rate for switching between dripping and non-dripping when both the inlet and outlet of the printhead are turned on; the first circulation controller (510) is turned on to keep the inlet and outlet flow rates of the ink reservoir (320) balanced; t6 is more than ten times t5. S5. Repeat steps S3 and S4 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S4, the second cycle controller (520) is intermittently turned on to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank (310), or the drain controller (530) is intermittently turned on to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank (330).

9. A moisturizing method for a continuous inkjet printer, characterized in that: Using the moisturizing structure according to any one of claims 1 to 5 includes the following steps: S1, the ink supply tank (310) and the ink output tank (320) are filled with moisturizing liquid; S2, the ink inlet controller (210), ink outlet controller (220), first cycle controller (510), second cycle controller (520), and waste discharge controller (530) are in the off state by default; S3. Turn on the ink inlet controller (210) and control the flow rate to Q6, turn off the ink outlet controller (220) to make the printhead spray ink at high pressure for a duration of t7. S4. Turn on the ink inlet controller (210) and control the flow rate to Q7. Turn on the ink outlet controller (220) and measure the flow rate to Q8. Q7>Q8, so that the printhead drips ink for t8. S5. The ink inlet controller (210) controls the flow rate to Q8. The ink outlet controller (220) measures the flow rate as Q8, and the printhead stops dripping ink for a duration of t9. Q8 < Q 阈 <Q6;Q 阈 The critical flow rate for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on; the first circulation controller (510) is turned on to keep the inlet and outlet flow rates of the ink reservoir (320) balanced; t9 is more than ten times t7; t9 is more than ten times t8. S6. Repeat steps S3, S4, and S5 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S5, the second cycle controller (520) is intermittently turned on to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank (310), or the drain controller (530) is intermittently turned on to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank (330).

10. A moisturizing method for a continuous inkjet printer, characterized in that: Using the moisturizing structure according to any one of claims 1 to 5 includes the following steps: S1, the ink supply tank (310) and the ink output tank (320) are filled with moisturizing liquid; S2, the ink inlet controller (210), ink outlet controller (220), first cycle controller (510), second cycle controller (520), and waste discharge controller (530) are in the off state by default; S3. Turn on the ink inlet controller (210) and control the flow rate Q. 进 The flow rate gradually increases, the ink output controller (220) is turned on, and the flow rate Q measured by the ink output controller (220) is... 出 Q 出 With Q 进 Simultaneously increase until Q 出 进 At this point, the printhead changes from not dripping ink to starting to drip ink, and Q is marked at this time. 进 For Q 阈 ', when Q 阈 '>1.2 Q 阈 Enter S4, when Q 阈 <= 1.2 Q 阈 Skip S4 and proceed to S5; Q 阈 The critical flow rate for ink dripping and non-drip switching when both the inlet and outlet of the printhead are turned on, as predicted by the printhead.​ S4. Turn on the ink inlet controller (210), control the flow rate to Q9, and turn off the ink outlet controller (220) to enable high-pressure ink ejection from the printhead for a duration of t. 10 ; S5. Turn on the ink inlet controller (210) and control the flow rate to Q. 10 Turn on the ink output controller (220) and measure the flow rate as Q. 11 Q 10 Q 11 This causes the printhead to drip ink continuously for t 11 ; S6, Ink inlet controller (210) controls the flow rate to Q 12 The flow rate measured by the ink output controller (220) is Q. 12 The printhead stops dripping ink for a duration of t. 12 Q 12 Q 阈 ' 10 ;Activate the first cycle controller (510) to maintain a balance between the inlet and outlet flow rates of the ink reservoir (320);t 12 For t 10 More than ten times; t 12 For t 11 More than ten times;​ S7. Repeat steps S3, S4, S5, and S6 until the next time the inkjet printer is used. During the repeated cycle of steps S3-S6, the second cycle controller (520) is intermittently turned on to allow the moisturizing liquid in the receiving tray to flow back to the ink supply storage tank (310), or the drain controller (530) is intermittently turned on to allow the moisturizing liquid in the receiving tray to be discharged to the waste liquid tank (330).

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