Liquid supply system

Abstract

A liquid supply system relates to the technical field of panel manufacturing and comprises an ink storage container, a transfer ink bag and a printing ink bag which are sequentially connected through pipelines. The ink storage container is connected with a first air supply mechanism, and the first air supply mechanism is used for providing air for the ink storage container, so that ink in the ink storage container is pressed into a pipeline and then flows into the transfer ink bag; the pipeline between the ink storage container and the transfer ink bag is provided with a degassing mechanism used for removing gas in ink flowing into the transfer ink bag from the ink storage container. By the adoption of the technical scheme, the closed ink storage container is adopted to supply ink into the transfer ink bag, then the transfer ink bag supplies the ink into the printing ink bag, the ink cannot make contact with air in the flowing process, gas in the ink flowing to the transfer ink bag from the ink storage container is removed through the degassing mechanism, and therefore the printing efficiency is improved. Therefore, bubbles are avoided during panel printing, the quality of finished panels is improved, and defects are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of panel manufacturing, in particular to a liquid supply system. Background Art

[0002] At present, the manufacturing development trend of organic light-emitting diodes (OLED) is moving towards inkjet printing. However, in inkjet printing, it is necessary to add ink to the print cartridge, that is, to add ink as new printing ink through a liquid supply system.

[0003] Ink in existing liquid supply systems is usually stored in a soft ink bag. The ink bag filled with ink is placed in an open ink cartridge. A needle with a center hole is provided at the bottom of the ink cartridge. The bottom of the bag is pierced by the needle, so that the ink in the ink bag flows into the open ink cartridge under the action of the external atmospheric pressure. The ink in the open ink cartridge is then transported to the printing cartridge through a pipeline, thereby realizing liquid supply to the printing cartridge.

[0004] However, since the ink cartridge is open, particles and dust in the air will enter the ink, and the particles and dust will eventually be printed onto the panel, causing panel defects. At the same time, since the ink is in direct contact with the air, the gas in the air will enter the ink, causing bubbles to appear during printing, thus causing panel defects. Utility Model Content

[0005] The purpose of the utility model is to provide a liquid supply system in view of the defects and shortcomings in the prior art.

[0006] The technical solution adopted by the utility model is: a liquid supply system, characterized in that it comprises an ink storage container, a transfer ink bag and a printing ink bag which are sequentially connected by a pipeline, the ink storage container has a closed ink storage cavity, the ink storage container is used to provide ink to the transfer ink bag, the transfer ink bag is used to receive the ink provided by the ink storage container and supply the ink to the printing ink bag, so as to realize liquid supply to the printing ink bag;

[0007] The ink storage container is connected to a first air supply mechanism, and the first air supply mechanism is used to provide gas to the ink storage container, so as to press the ink in the ink storage container into the pipeline and then flow into the transfer ink bag;

[0008] A degassing mechanism is provided on the pipeline between the ink storage container and the transfer ink bag, and the degassing mechanism is used to remove gas in the ink flowing from the ink storage container into the transfer ink bag to ensure the purity of the ink.

[0009] Optionally, the first gas supply mechanism includes a first gas supply pipe and a first control valve arranged on the first gas supply pipe, one end of the first gas supply pipe is connected to a gas supply device, and the other end of the gas supply pipe is connected to an ink storage container, and the first control valve is arranged at one end of the first gas supply pipe close to the ink storage container, and the first control valve is used to open or close the gas supply to the ink storage container.

[0010] Optionally, it also includes a second air supply mechanism, which is used to inject gas into the transfer ink bag so that the ink in the transfer ink bag can flow smoothly into the printing ink bag. The second air supply mechanism includes a second air supply pipe and a second control valve arranged on the second air supply pipe. One end of the second air supply pipe is connected to the gas supply device, and the other end of the second air supply pipe is connected to the transfer ink bag. The second control valve is used to open or close the air supply to the transfer ink bag.

[0011] Optionally, the degassing mechanism includes a degassing membrane connected in series on the pipe between the ink supply container and the transfer ink bag, the interior of the degassing membrane is provided with a flow channel for ink to pass through, the flow channel is provided with micropores for gas to pass through, the degassing membrane also has a vacuum cavity, the degassing membrane is connected to a first exhaust pipe connected to the vacuum cavity, the first exhaust pipe is used to exhaust the air in the vacuum cavity to generate negative pressure in the vacuum cavity, so that when the ink passes through the flow channel, the gas remaining in the ink can automatically separate from the ink and pass through the flow channel into the vacuum cavity.

[0012] Optionally, the degassing mechanism further includes a third control valve disposed on the first exhaust pipe, wherein the third control valve is used to control the opening and closing of the first exhaust pipe, and the third control valve can release the negative pressure in the degassing membrane when the first exhaust pipe is closed.

[0013] Optionally, a fourth control valve is provided on the pipeline between the degassing membrane and the transfer ink bag, and the fourth control valve is used to open and close the pipeline between the degassing membrane and the transfer ink bag to start or stop the ink supply to the transfer ink bag.

[0014] Optionally, the transfer ink bag is also connected to a second air suction pipe and a fifth control valve, the second air suction pipe is used to remove air and gas in the transfer ink bag so that the transfer ink bag can accommodate more ink, and the fifth control valve is used to control the opening and closing of the second air suction pipe to achieve automatic air suction of the transfer ink bag.

[0015] Optionally, a liquid adding port and a liquid discharging port are provided on the transfer ink bag, so as to realize liquid adding and liquid discharging of the transfer ink bag through the liquid adding port and the liquid discharging port.

[0016] Optionally, an electronic scale with an alarm function is provided on the bottom side of the ink storage container, and the electronic scale is used to detect the weight of the remaining ink in the ink storage container, so as to send out an alarm signal to remind the staff to replenish the ink when the ink in the ink storage container is insufficient.

[0017] After adopting the above technical solution, the beneficial effects of the utility model are:

[0018] 1. In the present application, when supplying liquid, gas is injected into the ink storage container with a closed ink storage cavity through the first gas supply mechanism, so that the ink in the ink storage container is pressed into the pipeline and then flows into the transfer ink bag. The gas in the ink flowing from the ink storage container into the transfer ink bag is removed by the degassing mechanism, so that the ink flowing into the transfer ink bag has a high purity and does not contain bubbles, so that bubbles will not appear during printing, thereby ensuring the quality of the panel. At the same time, during the process of supplying liquid, it will not come into contact with the air, thereby avoiding the situation where fine dust and powder in the air enter the ink and cause panel defects;

[0019] 2. The present application injects gas into the transfer ink bag through the second air supply mechanism, so that a certain air pressure exists in the transfer ink bag, so that the ink contained in the transfer ink bag can flow normally into the printing ink bag, thereby realizing a stable ink (liquid) supply to the printing ink bag;

[0020] 3. The present application provides a liquid filling port and a liquid discharge port, so that when a new product needs to use another ink, the residual ink in the transfer ink bag can be discharged through the liquid discharge port. When a new product needs to be tested in small batches and the transfer ink bag does not need to be replenished with an ink storage container, the transfer ink bag can be filled with liquid manually through the liquid filling port. At the same time, the transfer ink bag, the printing ink bag and the pipeline downstream of the transfer ink bag can be cleaned by adding cleaning liquid to the transfer ink bag through the liquid filling port. The operation is simple and convenient.

[0021] 4. The present application can effectively avoid the situation where the solenoid valves generate heat during use and affect the ink temperature by setting the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve as air-controlled valves instead of conventional solenoid valves, thereby further improving the liquid supply effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0024] Figure 2 yes Figure 1 A magnified view of part A;

[0025] Figure 3 This embodiment is a schematic diagram for illustrating the coordination relationship between the degassing membrane and the third control valve.

[0026] Description of reference numerals:

[0027] 10. Ink storage container; 11. Electronic scale;

[0028] 20. Transfer ink bag; 21. Second air extraction pipe; 22. Fifth control valve; 23. Liquid filling port; 24. Liquid discharge port;

[0029] 30. Printing ink sac;

[0030] 40. First air supply mechanism; 41. First air supply pipe; 42. First control valve;

[0031] 50, degassing mechanism; 51, degassing membrane; 511, flow channel; 512, vacuum chamber; 52, first exhaust pipe; 53, third control valve; 54, fourth control valve;

[0032] 60. Second air supply mechanism; 61. Second air supply pipe; 62. Second control valve;

[0033] 70. Main control valve; 71. Pressure regulating valve;

[0034] 100, pipeline; 200, trachea. DETAILED DESCRIPTION

[0035] The following will be combined with the attached embodiment of the utility model Figure 1-3 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "back", "side", "circumferential" and the like in the present invention indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. In addition, the words "first", "second" and the like are only used to distinguish multiple components or structures with the same or similar structures, and do not represent any special limitation on the setting order or connection relationship.

[0037] This embodiment relates to a liquid supply system, referring to Figure 1 , Figure 2 and Figure 3 , which is used to supply ink to the panel printing device, includes an ink storage container 10, a transfer ink capsule 20 and a printing ink capsule 30 connected in sequence through a pipeline 100, wherein the ink storage container 10 has a closed ink storage cavity, the ink storage cavity stores ink for printing, and the ink storage container 10 is used to supply ink to the transfer ink capsule 20. In this embodiment, the ink is liquid crystal, in other embodiments, the ink can also be liquid or fluid of other materials, and the liquid supply system provided in this application can also be applied to other fields where liquid supply or liquid replenishment is required.

[0038] In addition, regarding the storage method of the ink in the ink storage container 10, the ink can be directly injected into the ink storage container 10, or the ink can be stored in a closed liner bag so that the ink will not come into contact with the outside world during transportation or storage.

[0039] The transfer ink capsule 20 is used to receive the ink provided by the ink storage container 10 and supply the ink to the printing ink capsule 30 to realize the liquid supply to the printing ink capsule 30. The printing ink capsule 30 is connected with the print head of the panel printing device so that the ink flows from the printing ink capsule 30 into the print head, so that the print head can perform panel printing.

[0040] The ink storage container 10 is connected to a first air supply mechanism 40, which is used to provide gas to the ink storage container 10 to press the ink in the ink storage container 10 into the pipeline 100 and then flow into the transfer ink bag 20 to avoid contact between the ink and the air and provide power for the flow of the ink.

[0041] A degassing mechanism 50 is provided on the pipe 100 between the ink storage container 10 and the transfer ink bag 20. The degassing mechanism 50 is used to remove gas in the ink flowing from the ink storage container 10 into the transfer ink bag 20 to ensure the purity of the ink and avoid product defects caused by the appearance of bubbles during the printing process.

[0042] It can be understood that when supplying liquid, gas is injected into the ink storage container 10 through the first air supply mechanism 40, so that the ink in the ink storage container 10 is pressed into the pipeline 100 by the gas and flows to the transfer ink bag 20. At this time, the gas in the ink is removed by the degassing mechanism 50, so that the ink flowing into the transfer ink bag 20 will not have bubbles, so that no bubbles will be generated on the panel during the printing process, thereby ensuring the quality of the finished panel and reducing the production of defective products. At the same time, by setting the ink storage container 10 to be closed, the ink will not come into contact with the air throughout the process, thereby avoiding the situation where dust and fine dust in the air enter the ink and cause panel defects, thereby improving the quality of the finished panel.

[0043] Furthermore, the first gas supply mechanism 40 includes a first gas supply pipe 41 and a first control valve 42 arranged on the first gas supply pipe 41, one end of the first gas supply pipe 41 is connected to the gas supply device, and the other end of the first gas supply pipe 41 is connected to the ink storage container 10, the first control valve 42 is arranged at one end of the first gas supply pipe 41 close to the ink storage container 10, and the first control valve 42 is used to open and close the gas supply to the ink storage container 10.

[0044] It should be noted that, in the present embodiment, the gas provided by the gas supply device is nitrogen. In other embodiments, the gas provided by the gas supply device may also be an inert gas such as helium, which is not limited here.

[0045] It can be understood that by opening the first control valve 42, the gas provided by the gas supply device enters the ink storage container 10 from the first gas supply pipe 41, thereby pressing the ink in the ink storage container 10 into the pipeline 100 and flowing to the transfer ink bag 20, so that the ink storage container 10 can provide ink to the transfer ink bag 20.

[0046] Furthermore, the liquid supply system provided in this embodiment also includes a second air supply mechanism 60 , which is used to inject gas into the transfer ink bag 20 so that the ink in the transfer ink bag 20 can flow smoothly into the printing ink bag 30 .

[0047] The second air supply mechanism 60 includes a second air supply pipe 61 and a second control valve 62 arranged on the second air supply pipe 61. One end of the second air supply pipe 61 is connected to the gas supply device, and the other end of the second air supply pipe 61 is connected to the transfer ink bag 20. The second control valve 62 is used to open or close the air supply to the transfer ink bag 20.

[0048] It can be understood that gas is injected into the transfer ink bag 20 through the second air supply mechanism 60, so that the interior of the transfer ink bag 20 has a certain pressure, that is, the interior of the transfer ink bag 20 has a positive pressure, so that when the downstream printing ink bag 30 needs ink supply, the ink in the transfer ink bag 20 can automatically flow into the printing ink bag 30, thereby realizing a stable ink supply to the printing ink bag 30.

[0049] Furthermore, the degassing mechanism 50 includes a degassing membrane 51 on the pipe 100 connected in series between the ink supply container and the transfer ink bag 20, and the interior of the degassing membrane 51 is provided with a flow channel 511 for ink to pass through, and the flow channel 511 is provided with micropores for gas to pass through. The degassing membrane 51 also has a vacuum chamber 512, and the degassing membrane 51 is connected to a first exhaust pipe 52 connected to the vacuum chamber 512, and the first exhaust pipe 52 is externally connected to a vacuum pumping device to exhaust the air in the vacuum chamber 512 through the first exhaust pipe 52, so that the vacuum chamber 512 generates a negative pressure, so that when the ink passes through the flow channel 511, the gas remaining in the ink can automatically separate from the ink and enter the vacuum chamber 512, and finally be extracted from the vacuum chamber 512 by the first exhaust pipe 52.

[0050] It should be noted that the degassing membrane 51 is connected in series on the pipe 100 between the ink supply container and the transfer ink bag 20, so that the ink flowing from the ink supply container to the transfer ink bag 20 will flow into the flow channel 511 of the degassing membrane 51. The number of flow channels 511 is several. When the ink flows into the degassing membrane 51, the ink flows into one end of the degassing membrane 51 and is diverted into several flow channels 511, and then merges from the other end of the degassing membrane 51 and flows into the pipe 100. Through the setting of the micropores on the flow channel 511, the ink can pass normally, and the gas remaining in the ink will be automatically separated from the ink under the action of the vacuum chamber 512 and enter the vacuum chamber 512, thereby realizing the removal of residual gas in the ink, ensuring the purity of the ink, and avoiding panel defects caused by gas (bubbles) in the ink during the printing process.

[0051] Furthermore, the degassing mechanism 50 also includes a third control valve 53 arranged on the first exhaust pipe 52, and the third control valve 53 is used to control the opening and closing of the first exhaust pipe 52, and the third control valve 53 can release the negative pressure in the degassing membrane when the first exhaust pipe 52 is closed.

[0052] It can be understood that when the third control valve 53 opens the first air extraction pipe 52, the air in the vacuum chamber 512 is sucked into the first air extraction pipe 52 under the action of the vacuum extraction device, that is, at this time, negative pressure is generated inside the vacuum chamber 512, so that the gas in the ink in the flow channel 511 can be automatically separated from the ink and pass through the flow channel 511 into the vacuum chamber 512, and finally be sucked out of the vacuum chamber 512 by the first air extraction pipe 52, so as to achieve continuous "degassing" of the ink. When the third control valve 53 closes the first air extraction pipe 52, the third control valve 53 can release the negative pressure in the vacuum chamber 512, so as to avoid the ink remaining in the degassing membrane 51 from being continuously degassed when the liquid supply is stopped (long-term degassing or influence on the ink when the ink is stationary).

[0053] Furthermore, a fourth control valve 54 is provided on the pipe 100 between the degassing membrane 51 and the transfer ink bag 20 , and the fourth control valve 54 is used to open or close the pipe 100 between the degassing membrane 51 and the transfer ink bag 20 to start or stop the ink supply to the transfer ink bag 20 .

[0054] It can be understood that when the fourth control valve 54 is opened, the ink passing through the degassing mechanism 50 can flow smoothly into the transfer ink bag 20 to realize the liquid supply to the transfer ink bag 20. When the fourth control valve 54 is closed, the liquid supply to the transfer ink bag 20 is stopped.

[0055] Furthermore, the transfer ink bag 20 is also connected to a second air suction pipe 21 and a fifth control valve 22. The end of the second air suction pipe away from the transfer ink bag 20 is connected to the vacuum device. The second air suction pipe 21 is used to remove the air and gas in the transfer ink bag 20 so that the transfer ink bag 20 can accommodate more ink. The fifth control valve 22 is used to control the opening and closing of the second air suction pipe 21 to realize automatic air extraction of the transfer ink bag 20.

[0056] It should be noted that the air and gas in the transfer ink bag 20 are extracted by controlling the opening or closing of the second air extraction pipe 21 through the fifth control valve 22, so that negative pressure is generated in the transfer ink bag 20, so that the ink can smoothly flow from the ink storage container 10 into the transfer ink bag 20. If the second air extraction pipe 21 and the fifth control valve 22 are not provided to extract the air and gas in the transfer ink bag 20, since the air will also occupy a certain space, after the transfer ink bag 20 contains a certain volume of ink, it is difficult for the ink in the ink storage container 10 to be transported to the transfer ink bag 20, thereby reducing the ink holding capacity of the transfer ink bag 20. Therefore, the present application connects the second air extraction pipe 21 with the vacuum device to extract the air in the transfer cavity, so that the transfer ink bag 20 can hold more ink.

[0057] Furthermore, the liquid supply system provided in the present application also includes a main control valve 70 for controlling the opening or closing of the first control valve 42, the second control valve 62, the third control valve 53, the fourth control valve 54 and the fifth control valve 22. The main control valve 70 is a manual valve, and the first control valve 42, the second control valve 62, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 are all air-controlled valves, and the main control valve 70 is connected to the first control valve 42, the second control valve 62, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 through the air pipe 200.

[0058] It should be noted that, in this embodiment, the control main valve 70 has two gears, namely the first gear and the second gear. When liquid supply is required, the control main valve 70 is turned to the first gear, at which time the first control valve 42, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 are all in the open state, that is, at this time the first gas supply mechanism 40 continuously injects gas into the ink storage container 10, so that the ink in the ink storage container 10 is pressed into the pipeline 100 and enters the degassing membrane 51 for degassing before flowing into the transfer ink bag 20. When the ink is full in the transfer ink bag 20, the control main valve 70 is turned to the second gear, at which time the second control valve 62 is in an open state, and the first control valve 42, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 are in a closed state, that is, at this time the ink storage container 10 stops supplying liquid to the transfer ink bag 20, and at the same time the second control valve 62 is opened, and the second air supply mechanism 60 can inject gas into the transfer ink bag 20, so that the interior of the transfer ink bag 20 has a certain positive pressure (pressure), so that the ink in the transfer ink bag 20 can smoothly flow into the printing ink bag 30, and at this time the third control valve 53 closes the first exhaust pipe 52, and releases the negative pressure in the degassing membrane 51, to prevent the ink remaining in the degassing membrane 51 from being continuously degassed. In addition, in this embodiment, the first control valve 42, the second control valve 62, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 are all set as air-controlled valves instead of conventional solenoid valves, in order to avoid the situation where the solenoid valves heat up during operation and affect the ink.

[0059] Furthermore, the fluid replenishment system provided in this embodiment also includes a pressure regulating valve 71, and the number of the pressure regulating valves 71 is five. The five pressure regulating valves 71 are respectively arranged at the control main valve 70, the first control valve 42, the second control valve 62, the third control valve 53, and the fifth control valve 22 to control the pressure of the gas passing through the above-mentioned control valves.

[0060] It should be noted that the main control valve 70 is connected to the first control valve 42, the second control valve 62, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 through the air pipe 200, and the first control valve 42, the second control valve 62, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 are all air-controlled valves, and the gas circulating in the air pipe 200 is compressed air, so that the first control valve 42, the second control valve 62, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 can be controlled by compressed air. Therefore, a pressure regulating valve 71 is also needed to be provided at the main control valve 70.

[0061] Furthermore, a drain port 24 and a filling port 23 are also provided on the transfer ink bag 20 , and the drain port 24 and the filling port 23 are respectively arranged at the bottom and the top of the transfer ink bag 20 , so as to realize the filling and draining of the transfer ink bag 20 through the filling port 23 and the drain port 24 .

[0062] By setting the drain port 24 and the filling port 23, when a new product needs to use another ink, the residual ink in the transfer ink bag 20 can be discharged through the drain port 24. And when a new product needs to be trial-produced in small batches, when it is not necessary to use the ink storage container 10 to replenish the transfer ink bag 20, the transfer ink bag 20 can be manually replenished through the filling port 23.

[0063] In addition, by adding cleaning liquid into the transfer ink bag through the liquid filling port 23, the transfer ink bag, the printing ink bag and the downstream pipeline of the transfer ink bag can be cleaned.

[0064] Furthermore, an electronic scale 11 with an alarm function is provided on the bottom side of the ink storage container 10. The electronic scale 11 is used to detect the weight of the remaining ink in the ink storage container 10 so as to send out an alarm signal to remind the staff to replenish the ink when the ink in the ink storage container is insufficient.

[0065] It should be noted that, in other embodiments, a liquid level detection device may be provided to realize real-time monitoring of the ink in the ink storage container 10, thereby conveniently reminding the staff to replenish the ink in the ink storage container 10 in time, and no further limitation is made here.

[0066] The working principle of the utility model is roughly as follows: when replenishing liquid to the transfer ink bag 20, the main control valve 70 is turned to the first gear, so that the first control valve 42, the second control valve 62, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 are opened at the same time, that is, the first air supply component continues to supply gas to the ink storage container 10, so that the ink in the ink storage container 10 is pressed into the pipeline 100 and flows to the transfer ink bag 20. At this time, the gas in the ink flowing to the transfer ink bag 20 is removed by the degassing mechanism 50, so that there is no gas (bubble) in the ink flowing into the transfer ink bag 20, thereby avoiding panel defects caused by bubbles in the ink when printing the panel.

[0067] When the ink in the transfer ink bag 20 is filled up, the second control valve 62 is in an open state by turning the control main valve 70 to the second gear, and the first control valve 42, the third control valve 53, the fourth control valve 54 and the fifth control valve 22 are closed. That is, at this time, the ink storage container 10 stops supplying ink to the transfer ink bag 20, and at the same time, the second control valve 62 is opened, and the second air supply component continues to supply gas to the transfer ink bag 20, so that a positive pressure is formed inside the transfer ink bag 20, so that the ink in the transfer ink bag 20 can automatically flow to the printing ink bag 30, thereby realizing a stable liquid supply to the printing ink bag 30, and when the third control valve 53 closes the first exhaust pipe 52, the negative pressure of the vacuum chamber 512 of the degassing membrane 51 can be released to prevent the ink remaining in the degassing membrane 51 from being continuously degassed.

[0068] The above is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A liquid supply system, characterized in that: The invention comprises an ink storage container (10), a transfer ink bag (20) and a printing ink bag (30) which are sequentially connected via a pipeline (100); the ink storage container (10) has a closed ink storage chamber; the ink storage container (10) is used to provide ink to the transfer ink bag (20); the transfer ink bag (20) is used to receive the ink provided by the ink storage container (10) and supply the ink to the printing ink bag (30), so as to realize liquid supply to the printing ink bag (30); The ink storage container (10) is connected to a first air supply mechanism (40), and the first air supply mechanism (40) is used to provide gas to the ink storage container (10), so as to press the ink in the ink storage container (10) into the pipeline (100) and then flow into the transfer ink bag (20); A degassing mechanism (50) is provided on the pipe (100) between the ink storage container (10) and the transfer ink bag (20). The degassing mechanism (50) is used to remove gas from the ink flowing from the ink storage container (10) into the transfer ink bag (20) to ensure the purity of the ink.

2. A liquid supply system according to claim 1, characterized in that: The first air supply mechanism (40) includes a first air supply pipe (41) and a first control valve (42) arranged on the first air supply pipe (41); one end of the first air supply pipe (41) is connected to a gas supply device, and the other end of the air supply pipe is connected to an ink storage container (10); the first control valve (42) is arranged at one end of the first air supply pipe (41) close to the ink storage container (10); the first control valve (42) is used to open or close the air supply to the ink storage container (10).

3. A liquid supply system according to claim 1, characterized in that: The printing ink cartridge further comprises a second air supply mechanism (60), wherein the second air supply mechanism (60) is used to inject air into the transfer ink bag (20) so that the ink in the transfer ink bag (20) can flow smoothly into the printing ink bag (30), and the second air supply mechanism (60) comprises a second air supply pipe (61) and a second control valve (62) arranged on the second air supply pipe (61), one end of the second air supply pipe (61) is connected to the gas supply device, and the other end of the second air supply pipe (61) is connected to the transfer ink bag (20), and the second control valve (62) is used to open or close the air supply to the transfer ink bag (20).

4. A liquid supply system according to claim 1, characterized in that: The degassing mechanism (50) comprises a degassing membrane (51) on a pipe (100) connected in series between an ink supply container and a transfer ink bag (20); a flow channel (511) for ink to pass through is provided inside the degassing membrane (51); micropores for gas to pass through are provided on the flow channel (511); the degassing membrane (51) also has a vacuum cavity (512); the degassing membrane (51) is connected to a first exhaust pipe (52) in communication with the vacuum cavity (512); the first exhaust pipe (52) is used to exhaust air in the vacuum cavity (512) so that the vacuum cavity (512) generates a negative pressure, so that when the ink passes through the flow channel (511), the gas remaining in the ink can be automatically separated from the ink and pass through the flow channel (511) into the vacuum cavity (512).

5. A liquid supply system according to claim 4, characterized in that: The degassing mechanism (50) further comprises a third control valve (53) arranged on the first exhaust pipe (52), wherein the third control valve (53) is used to control the opening and closing of the first exhaust pipe (52), and the third control valve (53) can release the negative pressure in the degassing membrane when the first exhaust pipe (52) is closed.

6. A liquid supply system according to claim 4, characterized in that: A fourth control valve (54) is provided on the pipeline (100) between the degassing membrane and the transfer ink bag (20). The fourth control valve (54) is used to open and close the pipeline (100) between the degassing membrane (51) and the transfer ink bag (20) to start or stop the ink supply to the transfer ink bag (20).

7. A liquid supply system according to claim 1, characterized in that: The transfer ink bag (20) is also connected to a second air extraction pipe (21) and a fifth control valve (22). The second air extraction pipe (21) is used to extract air and gas in the transfer ink bag (20) so that the transfer ink bag (20) can accommodate more ink. The fifth control valve (22) is used to control the opening and closing of the second air extraction pipe (21) to realize automatic air extraction of the transfer ink bag (20).

8. A liquid supply system according to claim 1, characterized in that: The transfer ink bag (20) is provided with a liquid adding port (23) and a liquid discharging port (24), so that liquid can be added to and discharged from the transfer ink bag (20) through the liquid adding port (23) and the liquid discharging port (24).

9. A liquid supply system according to claim 1, characterized in that: An electronic scale (11) with an alarm function is arranged on the bottom side of the ink storage container (10), and the electronic scale (11) is used to detect the weight of the remaining ink in the ink storage container (10), so as to send out an alarm signal to remind the staff to replenish the ink when the ink in the ink storage container (10) is insufficient.

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