An ink supply printing system and an ink supply printing method

Abstract

The application discloses an ink supply printing system and an ink supply printing method. The ink supply printing system comprises a main ink cartridge, a first liquid level ink cartridge, a second liquid level ink cartridge, a printing nozzle, a first negative pressure tank, a second negative pressure tank and a control unit. The main ink cartridge is communicated with a first ink inlet, a first ink outlet is communicated with a third ink inlet, a second ink outlet is communicated with a fourth ink inlet, and a third ink outlet is communicated with a second ink inlet. The first negative pressure tank is communicated with the first liquid level ink cartridge, and the second negative pressure tank is communicated with the second liquid level ink cartridge. The control unit is in communication connection with the first negative pressure tank, the second negative pressure tank, the first liquid level ink cartridge and the second liquid level ink cartridge. According to the technical scheme, the flow rate of the printing nozzle is accurately controlled through the accurate control of the double negative pressure by the control unit and the liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge, the ink supply stability of the ink supply printing system is improved, and the compatibility and the maintainability of the system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing technology, and in particular to an ink supply printing system and an ink supply printing method. BACKGROUND

[0002] The ink supply system is a key component to ensure that the inkjet printer can print normally and with high quality. At present, the common ink supply system for inkjet printing mainly includes a gravity ink supply system, an air pressure ink supply system and a siphon ink supply system.

[0003] No matter the gravity ink supply system, the air pressure ink supply system or the siphon ink supply system, there are problems of inaccurate negative pressure control, poor ink supply stability and low system compatibility and maintainability. SUMMARY

[0004] The present application provides an ink supply printing system and an ink supply printing method to solve the problems of inaccurate negative pressure control, poor ink supply stability and low system compatibility and maintainability in the prior art.

[0005] According to a first aspect of the present application, an ink supply printing system is provided, comprising a main ink cartridge, a first liquid level ink cartridge, a second liquid level ink cartridge, a printing head, a first negative pressure tank, a second negative pressure tank and a control unit;

[0006] The first liquid level ink cartridge comprises a first ink inlet, a second ink inlet and a first ink outlet; the second liquid level ink cartridge comprises a third ink inlet and a second ink outlet; and the printing head comprises a fourth ink inlet and a third ink outlet;

[0007] The main ink cartridge is in communication with the first ink inlet, the first ink outlet is in communication with the third ink inlet, the second ink outlet is in communication with the fourth ink inlet, and the third ink outlet is in communication with the second ink inlet;

[0008] The first negative pressure tank is in communication with the first liquid level ink cartridge, and the second negative pressure tank is in communication with the second liquid level ink cartridge; the pressure in the first negative pressure tank is different from that in the second negative pressure tank, and the liquid level of the first liquid level ink cartridge is different from that of the second liquid level ink cartridge;

[0009] The control unit is in communication connection with the first negative pressure tank, the second negative pressure tank, the first liquid level ink cartridge and the second liquid level ink cartridge respectively, and is used for acquiring a liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge; and adjusting a pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to adjust a flow rate of the printing head.

[0010] Optionally, the pressure in the first negative pressure tank is greater than that in the second negative pressure tank and both are negative pressures;

[0011] The liquid level of the first liquid level ink cartridge is lower than that in the second liquid level ink cartridge.

[0012] Optionally, the ink supply printing system further comprises a first circulating pump and a second circulating pump.

[0013] The first circulating pump is arranged between the main ink cartridge and the first ink inlet, and is used for conveying the ink in the main ink cartridge to the first liquid level ink cartridge;

[0014] The second circulating pump is arranged between the first ink outlet and the third ink inlet, and is used for conveying the ink in the first liquid level ink cartridge to the second liquid level ink cartridge.

[0015] Optionally, the ink supply printing system further comprises a first degassing module and a second degassing module;

[0016] The first degassing module is arranged between the main ink cartridge and the first ink inlet, and is used for degassing the ink entering the first liquid level ink cartridge;

[0017] The second degassing module is arranged between the first ink outlet and the third ink inlet, and is used for degassing the ink entering the second liquid level ink cartridge.

[0018] Optionally, the first liquid level ink cartridge comprises a first liquid level sensor, and the second liquid level ink cartridge comprises a second liquid level sensor;

[0019] The first liquid level sensor and the second liquid level sensor are respectively in communication connection with the control unit.

[0020] Optionally, the first negative pressure tank comprises a first negative pressure gauge, and the second negative pressure tank comprises a second negative pressure gauge;

[0021] The first negative pressure gauge and the second negative pressure gauge are respectively in communication connection with the control unit.

[0022] Optionally, the control unit comprises a logic board;

[0023] The logic board comprises a first liquid level end, a second liquid level end, a first negative pressure end and a second negative pressure end;

[0024] The first liquid level end is in communication connection with the first liquid level ink cartridge, the second liquid level end is in communication connection with the second liquid level ink cartridge, the first negative pressure tank is in communication connection with the first negative pressure end, and the second negative pressure tank is in communication connection with the second negative pressure end.

[0025] Optionally, the logic board further comprises a negative pressure setting button;

[0026] The negative pressure setting button is respectively in communication connection with the first negative pressure end and the second negative pressure end, and is used for controlling the pressure in the first negative pressure tank and the second negative pressure tank.

[0027] According to a second aspect of the present application, an ink supply printing method is provided, which is applied to an ink supply printing system;

[0028] The ink supply printing method comprises:

[0029] Obtaining a liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge;

[0030] Adjust the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to adjust the flow rate of the print nozzle.

[0031] Optionally, adjusting the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to adjust the flow rate of the print nozzle, comprising:

[0032] Increasing the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to increase the flow rate of the print nozzle;

[0033] Reducing the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to reduce the flow rate of the print nozzle.

[0034] The technical scheme of the present application, by setting the main ink cartridge, the first liquid level ink cartridge, the second liquid level ink cartridge, the print nozzle, the first negative pressure tank, the second negative pressure tank and the control unit, through the accurate control of the control unit and the liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge, the flow rate of the print nozzle is accurately controlled, the ink supply stability of the ink supply printing system is improved, and the compatibility and maintainability of the system are enhanced.

[0035] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0037] Figure 1 is a structural schematic diagram of an ink supply printing system according to an embodiment of the present application;

[0038] Figure 2 is a connection schematic diagram of an ink supply printing system according to an embodiment of the present application;

[0039] Figure 3 is a partial structural schematic diagram of a first logic board according to an embodiment of the present application;

[0040] Figure 4 is a partial structural schematic diagram of a second logic board according to an embodiment of the present application;

[0041] Figure 5 is a flow schematic diagram of a first ink supply printing method according to an embodiment of the present application;

[0042] Figure 6 is a second ink supply printing method flow chart provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0044] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0045] Figure 1 is a structure diagram of an ink supply printing system provided according to an embodiment of the present application, Figure 2 is a connection diagram of an ink supply printing system provided according to an embodiment of the present application. In combination with Figure 1 and Figure 2 , the ink supply printing system comprises:

[0046] a main ink cartridge 1, a first liquid level ink cartridge 2, a second liquid level ink cartridge 3, a printing nozzle 4, a first negative pressure tank 5, a second negative pressure tank 6 and a control unit 7;

[0047] The first liquid level ink cartridge 2 comprises a first ink inlet a, a second ink inlet b and a first ink outlet c; the second liquid level ink cartridge 3 comprises a third ink inlet d and a second ink outlet e; the printing nozzle 4 comprises a fourth ink inlet f and a third ink outlet g;

[0048] The main ink cartridge 1 is in communication with the first ink inlet a, the first ink outlet c is in communication with the third ink inlet d, the second ink outlet e is in communication with the fourth ink inlet f, and the third ink outlet g is in communication with the second ink inlet b;

[0049] The first negative pressure tank 5 is communicated with the first liquid level ink box 2, and the second negative pressure tank 6 is communicated with the second liquid level ink box 3; the pressure in the first negative pressure tank 5 is different from that in the second negative pressure tank 6, and the liquid level of the first liquid level ink box 2 is different from that of the second liquid level ink box 3;

[0050] The control unit 7 is in communication connection with the first negative pressure tank 5, the second negative pressure tank 6, the first liquid level ink box 2 and the second liquid level ink box 3 respectively, is used for acquiring the liquid level difference between the first liquid level ink box 2 and the second liquid level ink box 3; and adjusting the pressure difference between the first negative pressure tank 5 and the second negative pressure tank 6 according to the liquid level difference to adjust the flow rate of the printing nozzle 4.

[0051] The main ink box 1 can be used for supplying ink to the first liquid level ink box 2 and the second liquid level ink box 3. The main ink box 1 is communicated with the first ink inlet a, the first ink outlet c is communicated with the third ink inlet d, the second ink outlet e is communicated with the fourth ink inlet f, and the third ink outlet g is communicated with the second ink inlet b, so that the ink in the main ink box 1 is input into the first liquid level ink box 2, and the ink circulates between the first liquid level ink box 2, the second liquid level ink box 3 and the printing nozzle 4, and the specific path is that the ink entering the first liquid level ink box 2 is output from the first ink outlet c into the third ink inlet d, is output from the second ink outlet e into the fourth ink inlet f, and is output from the third ink outlet g into the second ink inlet b. The flow rate of the ink circulation will affect the flow rate of the printing nozzle 4, so the first negative pressure tank 5 and the second negative pressure tank 6 with different pressures are set, the first negative pressure tank 5 is communicated with the first liquid level ink box 2, and negative pressure is introduced into the first liquid level ink box 2, and the second negative pressure tank 6 is communicated with the second liquid level ink box 3, and negative pressure is introduced into the second liquid level ink box 3.

[0052] The liquid level difference and the pressure difference between the first liquid level ink box 2 and the second liquid level ink box 3 can affect the flow rate of the printing nozzle 4, so by acquiring the liquid level difference between the first liquid level ink box 2 and the second liquid level ink box 3 and controlling the pressure difference between the first negative pressure tank 5 and the second negative pressure tank 6, the flow rate of the printing nozzle 4 is adjusted, and the stable supply of ink is realized.

[0053] Specifically, the potential energy of the liquid level difference between the first liquid level ink box 2 and the second liquid level ink box 3 is B, the pressure difference between the first negative pressure tank 5 and the second negative pressure tank 6 is A, and by adjusting the pressure difference A and superimposing B, A+B together determines the flow rate of the printing nozzle 4, and different flow rates of the printing nozzle 4 are realized in different working modes.

[0054] It can be understood that the technical scheme of the embodiment of the application adopts a double negative pressure mode, and the pressure of the ink supply printing system is adjusted in real time by the control unit 7 to ensure that the ink is supplied to the inkjet head at a corresponding flow rate, thereby improving the accuracy and consistency of ink droplet ejection, and improving the printing quality and ink supply stability; meanwhile, the embodiment of the application adopts a modular design concept, so that the ink supply printing system has good universality and expandability, is convenient for integration and adaptation with different models of printers, reduces the difficulty of system upgrading and replacement, at the same time, simplifies the system structure, improves the convenience of fault diagnosis and maintenance, reduces the maintenance cost, and improves the working efficiency of the printer.

[0055] The technical scheme of the embodiment of the application, by setting the main ink cartridge, the first liquid level ink cartridge, the second liquid level ink cartridge, the printing inkjet head, the first negative pressure tank, the second negative pressure tank and the control unit, through the accurate control of the double negative pressure by the control unit and the liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge, the flow rate of the printing inkjet head is accurately controlled, the ink supply stability of the ink supply printing system is improved, and the compatibility and maintainability of the system are enhanced.

[0056] Optionally, the pressure in the first negative pressure tank 5 is greater than the pressure in the second negative pressure tank 6 and is negative pressure;

[0057] The liquid level of the first liquid level ink cartridge 2 is lower than the liquid level in the second liquid level ink cartridge 3.

[0058] Optionally, the pressure in the first negative pressure tank 5 is greater than the pressure in the second negative pressure tank 6 and is negative pressure;

[0059] Optionally, continuing to refer to Figure 1 The first circulation pump 81 and the second circulation pump 82 are further included;

[0060] The first circulation pump 81 is arranged between the main ink cartridge 1 and the first ink inlet a, and is used for conveying the ink in the main ink cartridge 1 to the first liquid level ink cartridge 2;

[0061] The second circulation pump 82 is arranged between the first ink outlet c and the third ink inlet d, and is used for conveying the ink in the first liquid level ink cartridge 2 to the second liquid level ink cartridge 3.

[0062] Wherein, in order to fix the ink flow direction in the ink supply printing system, a first circulating pump 81 and a second circulating pump 82 are further arranged, the first circulating pump 81 is arranged between the main ink cartridge 1 and the first ink inlet a, and is used for conveying the ink in the main ink cartridge 1 to the first liquid level ink cartridge 2; the second circulating pump 82 is arranged between the first ink outlet c and the third ink inlet d, and is used for conveying the ink in the first liquid level ink cartridge 2 to the second liquid level ink cartridge 3, so as to ensure the normal flow of the ink.

[0063] Optionally, continuing to refer to Figure 1 As shown, the ink supply printing system further comprises a first degassing module 91 and a second degassing module 92.

[0064] The first degassing module 91 is arranged between the main ink cartridge 1 and the first ink inlet a, and is used for degassing the ink entering the first liquid level ink cartridge 2.

[0065] The second degassing module 92 is arranged between the first ink outlet c and the third ink inlet d, and is used for degassing the ink entering the second liquid level ink cartridge 3.

[0066] Wherein, the degassing module can be used for degassing the ink in the ink cartridge. The first degassing module 91 is arranged between the main ink cartridge 1 and the first ink inlet a, and can degas the ink entering the first liquid level ink cartridge 2 through an external negative pressure device; the second degassing module 92 is arranged between the first ink outlet c and the third ink inlet d, and can degas the ink entering the second liquid level ink cartridge 3 through an external negative pressure device.

[0067] In some embodiments, the first degassing module 91 and the second degassing module 92 can be respectively connected with a negative pressure device of 0.9Mpa-2Mpa to degas the ink, so as to ensure the printing quality.

[0068] In the embodiment of the present application, the first degassing module and the second degassing module are arranged, so that the ink entering the first liquid level ink cartridge and the ink entering the second liquid level ink cartridge are degassed, and the printing quality of the ink supply printing system is ensured.

[0069] Optionally, continuing to refer to Figure 2 As shown, the first liquid level ink cartridge 2 comprises a first liquid level sensor 101; and the second liquid level ink cartridge 3 comprises a second liquid level sensor 102.

[0070] The first liquid level sensor 101 and the second liquid level sensor 102 are respectively in communication connection with the control unit 7.

[0071] The first liquid level sensor 101 and the second liquid level sensor 102 can be used to detect the liquid level in the ink cartridge. The first liquid level sensor 101 is arranged in the first liquid level ink cartridge 2, and the second liquid level sensor 102 is arranged in the second liquid level ink cartridge 3, so as to detect the liquid level of the two ink cartridges respectively and transmit to the control unit 7 in real time, and then the control unit 7 can acquire the liquid level difference of the first liquid level ink cartridge 2 and the second liquid level ink cartridge 3 in real time, and then adjust the pressure difference, so as to ensure the accurate control of the ink flow rate.

[0072] The technical scheme of the embodiment of the application acquires the liquid level difference of the first liquid level ink cartridge and the second liquid level ink cartridge in real time by arranging the first liquid level sensor and the second liquid level sensor, and ensures the accurate control of the ink flow rate by the control unit.

[0073] Optionally, continuing to refer to Figure 2 As shown, the first negative pressure tank 5 comprises a first negative pressure table 111; and the second negative pressure tank 6 comprises a second negative pressure table 112.

[0074] The first negative pressure table 111 and the second negative pressure table 112 are respectively in communication connection with the control unit 7.

[0075] The first negative pressure table 111 and the second negative pressure table 112 can be used to detect the negative pressure value in the negative pressure tank in real time, and then the control unit 7 acquires the pressure difference in the first negative pressure tank 5 and the second negative pressure tank 6 in real time and performs feedback adjustment, so as to ensure the accurate control of the ink flow rate by the control unit 7.

[0076] Optionally, Figure 3 is a partial structure schematic view of a first logic board according to the embodiment of the application, which is combined with Figure 2 and Figure 3 As shown, the control unit 7 comprises a logic board 71.

[0077] The logic board 71 comprises a first liquid level end J5, a second liquid level end J6, a first negative pressure end J3 and a second negative pressure end J4.

[0078] The first liquid level end J5 is in communication connection with the first liquid level ink cartridge 2, the second liquid level end J6 is in communication connection with the second liquid level ink cartridge 3, the first negative pressure tank 5 is in communication connection with the first negative pressure end J3, and the second negative pressure tank 6 is in communication connection with the second negative pressure end J4.

[0079] The logic board 71 can be a circuit board. The logic board 71 includes a plurality of pins, i.e., a first liquid level end J5, a second liquid level end J6, a first negative pressure end J3 and a second negative pressure end J4. The first liquid level end J5 is in communication connection with the first liquid level ink cartridge 2 to transmit the liquid level in the first liquid level ink cartridge 2 to the first liquid level end J5 in real time. The second liquid level end J6 is in communication connection with the second liquid level ink cartridge 3 to transmit the liquid level in the second liquid level ink cartridge 3 to the second liquid level end J6 in real time. The first negative pressure tank 5 is in communication connection with the first negative pressure end J3 to transmit the pressure in the first negative pressure tank 5 to the first negative pressure end J3 in real time. The second negative pressure tank 6 is in communication connection with the second negative pressure end J4 to transmit the pressure in the second negative pressure tank 6 to the second negative pressure end J4 in real time.

[0080] It can be understood that the logic board 71 in the embodiment of the present application includes a plurality of pins, which are respectively in communication connection with the first liquid level ink cartridge 2, the second liquid level ink cartridge 3, the first negative pressure tank 5 and the second negative pressure tank 6 to realize the reception and feedback control of signals, thereby ensuring the accuracy and reliability of the ink flow rate control.

[0081] In some embodiments, the logic board 71 is also in communication connection with the first circulating pump 81 and the second circulating pump 82 to reduce the fluctuation of the ink supply printing system by adjusting the number of revolutions of the first circulating pump 81 and the second circulating pump 82, thereby further stabilizing the negative pressure size.

[0082] In the embodiment of the present application, the logic board is used to receive and feedback the liquid level signal and the negative pressure signal, so that the ink in the first liquid level ink cartridge and the second liquid level ink cartridge is always kept at a stable amount, thereby ensuring the stability of the negative pressure value and further ensuring the stability of the ink supply.

[0083] Optionally, Figure 4 is a partial structure diagram of a second logic board according to the embodiment of the present application, as Figure 4 shown, the logic board 71 further includes a negative pressure setting button 710.

[0084] The negative pressure setting button 710 is in communication connection with the first negative pressure end J3 and the second negative pressure end J4 respectively to control the pressure in the first negative pressure tank 5 and the second negative pressure tank 6.

[0085] The operator can adjust the pressure value in the first negative pressure tank 5 and the second negative pressure tank 6 by operating the negative pressure setting button 710.

[0086] For example, as Figure 4 shown, the "set" key is pressed for a long time to enter the setting mode. After entering the setting mode, the setting value becomes red. The "set" key is pressed again to enter the switching pressure channel. The setting value is increased or decreased by pressing the "+" key or the "-" key, thereby achieving the purpose of adjusting the pressure value in the first negative pressure tank 5 and the second negative pressure tank 6.

[0087] The technical scheme of the embodiment of the present application sets the negative pressure setting button, so that the operator can adjust the pressure value in the first negative pressure tank and the second negative pressure tank through the negative pressure setting button, and the purpose of accurately controlling the negative pressure is achieved.

[0088] Based on the same inventive concept, Figure 5 is a first ink supply printing method flowchart provided by the embodiment of the present application, which is combined with Figure 1 , Figure 2 and Figure 5 , the embodiment of the present application provides an ink supply printing method applied to an ink supply printing system.

[0089] The ink supply printing method comprises the following steps.

[0090] S10, obtaining a liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge.

[0091] S11, adjusting a pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to adjust the flow rate of the printing nozzle.

[0092] Specifically, the liquid level difference between the first liquid level ink cartridge 2 and the second liquid level ink cartridge 3 is B, the pressure difference between the first negative pressure tank 5 and the second negative pressure tank 6 is A, and by adjusting the pressure difference A and superimposing B, A+B together determine the flow rate of the printing nozzle 4, so that the printing nozzle 4 realizes different flow rates in different working modes.

[0093] The technical scheme of the embodiment of the present application obtains the liquid level difference between the first liquid level ink cartridge 2 and the second liquid level ink cartridge 3, and feedback controls the double negative pressure system, accurately controls the flow rate of the printing nozzle 4, improves the ink supply stability of the ink supply printing system, and at the same time enhances the compatibility and maintainability of the system.

[0094] On the basis of the above embodiment, Figure 6 is a second ink supply printing method flowchart provided by the embodiment of the present application, which is combined with Figure 1 , Figure 2 and Figure 6 , the ink supply printing method comprises the following steps.

[0095] S20, obtaining a liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge.

[0096] S21, increasing the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to increase the flow rate of the printing nozzle.

[0097] S22, reducing the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to reduce the flow rate of the printing nozzle.

[0098] Wherein, since the liquid level difference and the pressure difference both affect the flow rate of the print head 4, under the condition that the required print head 4 flow rate is fixed, the target pressure difference can be determined through the print head 4 flow rate and the liquid level difference after the liquid level difference is obtained, and the required print head 4 flow rate is achieved by adjusting the pressure difference to the target pressure difference. In the case that the required print head 4 flow rate increases due to the change of the working mode, the flow rate of the print head 4 can be increased by increasing the pressure difference; in the case that the required print head 4 flow rate decreases due to the change of the working mode, the flow rate of the print head 4 can be reduced by reducing the pressure difference, so as to realize the adaptation of the ink supply printing system in different modes and ensure the stability of the ink supply.

[0099] The technical scheme of the embodiment of the present application adopts the mode of double negative pressure, adjusts the pressure of the ink supply printing system in real time through the control unit, ensures that the ink is supplied to the print head at a corresponding flow rate, and thus improves the precision and consistency of ink droplet ejection, and improves the printing quality and ink supply stability. Meanwhile, the embodiment of the present application adopts the modular design concept, so that the ink supply printing system has good universality and expandability, is convenient for integration and adaptation with different models of printers, reduces the difficulty of system upgrading and replacement, at the same time, simplifies the system structure, improves the convenience of fault diagnosis and maintenance, reduces the maintenance cost, and improves the working efficiency of the printer.

[0100] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical scheme of the present application can be achieved, which is not limited herein.

[0101] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An ink supply printing method characterized by, The application is applied to an ink supply printing system, and the ink supply printing system comprises: a main ink cartridge, a first liquid level ink cartridge, a second liquid level ink cartridge, a printing head, a first negative pressure tank, a second negative pressure tank and a control unit; the first liquid level ink cartridge comprises a first ink inlet, a second ink inlet and a first ink outlet; the second liquid level ink cartridge comprises a third ink inlet and a second ink outlet; and the printing head comprises a fourth ink inlet and a third ink outlet; the main ink cartridge is in communication with the first ink inlet, the first ink outlet is in communication with the third ink inlet, the second ink outlet is in communication with the fourth ink inlet, and the third ink outlet is in communication with the second ink inlet; the first negative pressure tank is in communication with the first liquid level ink cartridge, and the second negative pressure tank is in communication with the second liquid level ink cartridge; the pressure in the first negative pressure tank is different from that in the second negative pressure tank, and the liquid level of the first liquid level ink cartridge is different from that of the second liquid level ink cartridge; the control unit is in communication connection with the first negative pressure tank, the second negative pressure tank, the first liquid level ink cartridge and the second liquid level ink cartridge respectively, is used for acquiring the liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge, and adjusting the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to adjust the flow rate of the printing head; the pressure in the first negative pressure tank is greater than that in the second negative pressure tank and is negative pressure; the liquid level of the first liquid level ink cartridge is lower than that in the second liquid level ink cartridge; the control unit comprises a logic board; the logic board comprises a first liquid level end, a second liquid level end, a first negative pressure end and a second negative pressure end; the first liquid level end is in communication connection with the first liquid level ink cartridge, the second liquid level end is in communication connection with the second liquid level ink cartridge, the first negative pressure tank is in communication connection with the first negative pressure end, and the second negative pressure tank is in communication connection with the second negative pressure end; the logic board further comprises a negative pressure setting button; the negative pressure setting button is in communication connection with the first negative pressure end and the second negative pressure end respectively, and is used for controlling the pressure in the first negative pressure tank and the second negative pressure tank; the ink supply printing method comprises: acquiring the liquid level difference between the first liquid level ink cartridge and the second liquid level ink cartridge; adjusting the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to adjust the flow rate of the printing head; wherein the pressure in the first negative pressure tank is greater than that in the second negative pressure tank and is negative pressure; and the liquid level of the first liquid level ink cartridge is lower than that in the second liquid level ink cartridge.

2. The method of ink supply printing according to claim 1, characterized by, adjusting the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to adjust the flow rate of the printing head comprises: increasing the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to increase the flow rate of the printing head; decreasing the pressure difference between the first negative pressure tank and the second negative pressure tank according to the liquid level difference to decrease the flow rate of the printing head.

3. The method of ink supply printing according to claim 1, characterized by, the ink supply printing system further comprises a first circulating pump and a second circulating pump; the first circulating pump is arranged between the main ink cartridge and the first ink inlet, and is used for conveying the ink in the main ink cartridge into the first liquid level ink cartridge; The second circulating pump is arranged between the first ink outlet and the third ink inlet, and is used for conveying the ink in the first liquid level ink box into the second liquid level ink box.

4. The method of ink supply printing according to claim 1, characterized by, The ink supply printing system further comprises a first degassing module and a second degassing module; The first degassing module is arranged between the main ink box and the first ink inlet, and is used for degassing the ink entering the first liquid level ink box; The second degassing module is arranged between the first ink outlet and the third ink inlet, and is used for degassing the ink entering the second liquid level ink box.

5. The method of ink supply printing according to claim 1, characterized by, The first liquid level ink box comprises a first liquid level sensor; and the second liquid level ink box comprises a second liquid level sensor; The first liquid level sensor and the second liquid level sensor are respectively in communication connection with the control unit.

6. The method of ink supply printing according to claim 1, wherein The first negative pressure tank comprises a first negative pressure gauge; and the second negative pressure tank comprises a second negative pressure gauge; The first negative pressure gauge and the second negative pressure gauge are respectively in communication connection with the control unit.

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