Digital printer with ink supply circulation system

Abstract

The invention discloses a digital printer with an ink supply circulation system, which relates to the technical field of ink supply and comprises an ink circulation branch composed of a main ink barrel, an ink pump, a backflow ink box, a peristaltic pump, an auxiliary ink box, an ink storage cavity and an ink jet head. The ink supply circulation system further comprises a temperature control assembly which is connected with the backflow ink box and the auxiliary ink box. According to the ink supply circulation system, the ink jet efficiency of the digital printer can be improved, the air pressure of the inner cavities of the backflow ink box and the auxiliary ink box can be balanced easily, poor ink supply and even ink interruption are prevented, and the ink supply efficiency of the digital printer is improved. And the pressure relief magnetic valve can be controlled to keep the air pressure in the backflow ink box consistent with the air pressure in the auxiliary ink box, so that a constant pressure difference is formed to ensure that the ink circularly flows at a constant flow speed, and the problems of ink supply smoothness and printing color difference can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of ink supply, and in particular to a digital printer with an ink supply circulation system. Background Art

[0002] The ink supply method of the existing digital printer is to pump the ink from the ink barrel into the ink storage chamber on the head of the machine through a peristaltic pump, and use the heating wire installed in the ink storage chamber to heat the ink in the nozzle to expand and drip, and the bottom of the auxiliary ink cartridge is connected to the ink inlet of the nozzle through a pipeline, and then the negative pressure in the auxiliary ink cartridge is controlled to offset the gravity of the ink, and the nozzle absorbs the ink from the auxiliary ink bottle through the effect of siphon;

[0003] This ink supply method not only causes the ink pressure on both sides of the nozzle to be unbalanced during normal printing because the ink cannot flow, but also makes it difficult to maintain the temperature required for its expansion after the ink is heated and used. As a result, the ink still needs to be heated for a long time to expand and drip when it is used later, reducing the inkjet efficiency of the digital printer.

[0004] In view of this, the present invention proposes a digital printer with an ink supply circulation system to make up for and improve the deficiencies of the prior art. Summary of the invention

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a digital printer with an ink supply circulation system, including an ink circulation branch composed of a main ink barrel, an ink pump, a return ink cartridge, a peristaltic pump, an auxiliary ink cartridge, an ink storage chamber, and an inkjet head;

[0006] The ink pumping end is connected to the main ink barrel through the ink supply tube, the ink discharge end is connected to the return ink cartridge through the ink supply tube, the ink pumping end is connected to the return ink cartridge through the ink supply tube, the ink discharge end is connected to the auxiliary ink cartridge through the ink supply tube, and an ink storage cavity is provided on the inkjet head, and the ink storage cavity is respectively connected to the return ink cartridge and the auxiliary ink cartridge through the ink supply tube;

[0007] The ink supply circulation system also includes:

[0008] A temperature control component, the temperature control component is connected to the return ink cartridge and the auxiliary ink cartridge respectively;

[0009] The pressure control component is connected with the return ink cartridge and the auxiliary ink cartridge respectively.

[0010] Preferably, the temperature control component includes a temperature control device, a main water cooling plate, a main heating plate, an auxiliary water cooling plate and an auxiliary heating plate. The main water cooling plate and the main heating plate are both installed on the outer surface of the reflux ink cartridge, and the auxiliary water cooling plate and the auxiliary heating plate are both installed on the outer surface of the auxiliary ink cartridge. The temperature control device is electrically connected to the main water cooling plate, the main heating plate, the auxiliary water cooling plate and the auxiliary heating plate through multiple lines.

[0011] Preferably, a main temperature sensor is provided on the reflux ink cartridge, and the main temperature sensor is connected to the temperature control device through a circuit, and a secondary temperature sensor is provided on the secondary ink cartridge, and the secondary temperature sensor is connected to the temperature control device through a circuit.

[0012] Preferably, the temperature control assembly also includes a BMS and a power battery, and the power battery is used to supply power to the main water cooling plate, the main heating plate, the auxiliary water cooling plate and the auxiliary heating plate.

[0013] Preferably, the BMS is connected to the main temperature sensor and the auxiliary temperature sensor respectively through signal lines. When the BMS charges or discharges the power battery system, the BMS monitors the main temperature sensor and the auxiliary temperature sensor in real time. When the difference between the main temperature sensor and the auxiliary temperature sensor is greater than a preset value, the BMS sends a temperature balancing instruction to the temperature control device.

[0014] Preferably, the pressure control component includes a pressure sensor and a pressure relief magnetic valve. The pressure sensor is arranged between the reflux ink cartridge and the auxiliary ink cartridge, and the pressure sensor is used to monitor the air pressure values ​​in the inner cavities of the reflux ink cartridge and the auxiliary ink cartridge respectively. The pressure relief magnetic valve is arranged on the reflux ink cartridge.

[0015] Preferably, a main liquid level sensor is provided inside the reflux ink cartridge, and a secondary liquid level sensor is provided inside the secondary ink cartridge.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention can utilize the main temperature sensor in the temperature control component to sense the temperature of the ink circulated in the return ink cartridge and the auxiliary ink cartridge, and when the temperature difference measured is greater than a preset value, the BMS sends a temperature balancing instruction to the temperature control device to reduce the temperature difference of the ink circulated in the return ink cartridge and the auxiliary ink cartridge, and control the temperature to a temperature at which the ink is easy to expand and drip, thereby not only improving the inkjet efficiency of the digital printer, but also facilitating the balancing of the air pressure in the inner cavity of the return ink cartridge and the auxiliary ink cartridge, thereby preventing poor ink supply or even ink interruption;

[0018] The present invention can utilize the settings of the pressure sensor, the main liquid level sensor, and the auxiliary liquid level sensor to detect the ink storage air pressure in the return ink cartridge and the auxiliary ink cartridge, and maintain the air pressure in the return ink cartridge consistent with the air pressure in the auxiliary ink cartridge by controlling the pressure relief magnetic valve, thereby forming a constant pressure difference to ensure that the ink circulates at a constant flow rate, which can effectively solve the problems of ink supply smoothness and printing color difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0020] Figure 2It is a schematic diagram of the structure in which the temperature control device shown in the present invention is connected to the reflux ink cartridge and the auxiliary ink cartridge respectively;

[0021] Figure 3 It is a schematic diagram of the program flow of circulating ink supply shown in the present invention;

[0022] Figure 4 It is a functional block diagram of the temperature control device shown in the present invention.

[0023] The numbers in the figure are:

[0024] 1. Main ink barrel; 2. Ink pump; 3. Reflux ink cartridge; 4. Main liquid level sensor; 5. Main water cooling plate; 6. Main heating plate; 7. Main temperature sensor; 8. Temperature control device; 9. Pressure relief magnetic valve; 10. Ink storage chamber; 11. Inkjet head; 12. Peristaltic pump; 13. Auxiliary ink cartridge; 14. Auxiliary liquid level sensor; 15. Auxiliary water cooling plate; 16. Auxiliary heating plate; 17. Auxiliary temperature sensor; 18. Pressure sensor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiments of the present invention

[0027] Please refer to Figures 1 to 4 As shown, a digital printer with an ink supply circulation system includes an ink circulation branch composed of a main ink barrel 1, an ink pump 2, a return ink cartridge 3, a peristaltic pump 12, an auxiliary ink cartridge 13, an ink storage chamber 10, and an inkjet head 11;

[0028] The ink pump 2 is connected to the main ink barrel 1 through the ink supply tube, the ink discharge end of the ink pump 2 is connected to the return ink cartridge 3 through the ink supply tube, the ink pump 12 is connected to the return ink cartridge 3 through the ink supply tube, the ink discharge end of the peristaltic pump 12 is connected to the auxiliary ink cartridge 13 through the ink supply tube, and the ink storage cavity 10 is opened on the inkjet head 11, and the ink storage cavity 10 is respectively connected to the return ink cartridge 3 and the auxiliary ink cartridge 13 through the ink supply tube;

[0029] The ink supply circulation system also includes:

[0030] A temperature control component, the temperature control component is connected to the reflux ink cartridge 3 and the auxiliary ink cartridge 13 respectively;

[0031] A pressure control component, the pressure control component is connected to the reflux ink cartridge 3 and the auxiliary ink cartridge 13 respectively;

[0032] The temperature control assembly includes a temperature control device 8, a main water cooling plate 5, a main heating plate 6, an auxiliary water cooling plate 15 and an auxiliary heating plate 16. The main water cooling plate 5 and the main heating plate 6 are both installed on the outer surface of the reflux ink cartridge 3, and the auxiliary water cooling plate 15 and the auxiliary heating plate 16 are both installed on the outer surface of the auxiliary ink cartridge 13. The temperature control device 8 is electrically connected to the main water cooling plate 5, the main heating plate 6, the auxiliary water cooling plate 15 and the auxiliary heating plate 16 through multiple lines.

[0033] The return ink cartridge 3 is provided with a main temperature sensor 7, and the main temperature sensor 7 is connected to the temperature control device 8 through a line, and the auxiliary ink cartridge 13 is provided with an auxiliary temperature sensor 17, and the auxiliary temperature sensor 17 is connected to the temperature control device 8 through a line;

[0034] The temperature control assembly also includes a BMS and a power battery, the power battery is used to supply power to the main water cooling plate 5, the main heating plate 6, the auxiliary water cooling plate 15 and the auxiliary heating plate 16;

[0035] The BMS is connected to the main temperature sensor 7 and the auxiliary temperature sensor 17 through signal lines. When the BMS charges or discharges the power battery system, the BMS monitors the main temperature sensor 7 and the auxiliary temperature sensor 17 in real time. When the difference between the main temperature sensor 7 and the auxiliary temperature sensor 17 is greater than a preset value, the BMS sends a temperature balancing instruction to the temperature control device 8.

[0036] The pressure control component includes a pressure sensor 18 and a pressure relief magnetic valve 9. The pressure sensor 18 is arranged between the reflux ink cartridge 3 and the auxiliary ink cartridge 13, and the pressure sensor 18 is used to monitor the air pressure values ​​of the inner cavities of the reflux ink cartridge 3 and the auxiliary ink cartridge 13 respectively. The pressure relief magnetic valve 9 is arranged on the reflux ink cartridge 3;

[0037] A main liquid level sensor 4 is provided inside the reflux ink cartridge 3, and an auxiliary liquid level sensor 14 is provided inside the auxiliary ink cartridge 13;

[0038] By adopting the above scheme, the main temperature sensor 7 in the temperature control component can be used to sense the temperature of the ink circulated in the reflux ink cartridge 3 and the auxiliary ink cartridge 13, and when the temperature difference measured is greater than the preset value, the BMS sends a temperature balancing instruction to the temperature control device 8 to reduce the temperature difference of the ink circulated in the reflux ink cartridge 3 and the auxiliary ink cartridge 13, and control the temperature to a temperature at which the ink is easy to expand and drip, which can not only improve the inkjet efficiency of the digital printer, but also make it easy to balance the air pressure in the inner cavity of the reflux ink cartridge 3 and the auxiliary ink cartridge 13, and prevent poor ink supply or even ink interruption;

[0039] In addition, the pressure sensor 18, the main liquid level sensor 4 and the auxiliary liquid level sensor 14 can be used to detect the ink storage air pressure in the reflux ink cartridge 3 and the auxiliary ink cartridge 13, and the air pressure in the reflux ink cartridge 3 is maintained consistent with the air pressure in the auxiliary ink cartridge 13 by controlling the pressure relief magnetic valve 9, thereby forming a constant pressure difference to ensure that the ink circulates at a constant flow rate, which can effectively solve the problems of ink supply smoothness and printing color difference.

[0040] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process, which are as follows:

[0041] The ink pump 2 and the peristaltic pump 12 drive the ink to circulate from the main ink barrel 1 → the reflux ink cartridge 3 → the ink storage chamber 10 → the auxiliary ink cartridge 13 → the reflux ink cartridge 3. After the reflux ink cartridge 3 and the auxiliary ink cartridge 13 have both entered the ink, the main temperature sensor 7 and the auxiliary temperature sensor 17 detect their temperatures. When the temperature difference is greater than the preset value, the BMS sends a temperature balancing instruction to the temperature control device 8. The temperature control device 8 controls the temperature of the reflux ink cartridge 3 and the auxiliary ink cartridge 13 through the main water cooling plate 5, the main heating plate 6, the auxiliary water cooling plate 15 and the auxiliary heating plate 16, so that the temperature is controlled to be at a temperature that is easy for the ink to flow. The temperature of the expanded dripping can not only improve the inkjet efficiency of the digital printer, but also easily balance the air pressure in the inner cavity of the reflux ink cartridge 3 and the auxiliary ink cartridge 13 to prevent poor ink supply or even ink interruption. Subsequently, the main liquid level sensor 4 and the auxiliary liquid level sensor 14 cooperate with the pressure sensor 18 to detect the air pressure in the reflux ink cartridge 3 and the auxiliary ink cartridge 13, and transmit the air pressure value to the pressure sensor 18, which controls the pressure relief magnetic valve 9 to adjust the air pressure in the reflux ink cartridge 3, so that the air pressure in the reflux ink cartridge 3 is maintained consistent with the air pressure in the auxiliary ink cartridge 13, thereby forming a constant pressure difference to ensure that the ink circulates at a constant flow rate.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A digital printer with an ink supply circulation system, It is characterized in that include: An ink circulation branch consisting of a main ink barrel (1), an ink pump (2), a return ink cartridge (3), a peristaltic pump (12), an auxiliary ink cartridge (13), an ink storage chamber (10), and an inkjet head (11); The ink pump (2) has an ink suction end connected to the main ink barrel (1) via an ink supply tube, the ink discharge end of the ink pump (2) is connected to the return ink cartridge (3) via an ink supply tube, the ink suction end of the peristaltic pump (12) is connected to the return ink cartridge (3) via an ink supply tube, the ink discharge end of the peristaltic pump (12) is connected to the auxiliary ink cartridge (13) via an ink supply tube, and an ink storage chamber (10) is provided on the inkjet head (11), and the ink storage chamber (10) is respectively connected to the return ink cartridge (3) and the auxiliary ink cartridge (13) via the ink supply tube; The ink supply circulation system also includes: A temperature control component, wherein the temperature control component is connected to the return ink cartridge (3) and the auxiliary ink cartridge (13) respectively; A pressure control component is connected to the return ink cartridge (3) and the auxiliary ink cartridge (13) respectively.

2. The digital printer with an ink supply circulation system according to claim 1, It is characterized in that The temperature control assembly comprises a temperature control device (8), a main water cooling plate (5), a main heating plate (6), an auxiliary water cooling plate (15) and an auxiliary heating plate (16); the main water cooling plate (5) and the main heating plate (6) are both mounted on the outer surface of the reflux ink cartridge (3); the auxiliary water cooling plate (15) and the auxiliary heating plate (16) are both mounted on the outer surface of the auxiliary ink cartridge (13); and the temperature control device (8) is electrically connected to the main water cooling plate (5), the main heating plate (6), the auxiliary water cooling plate (15) and the auxiliary heating plate (16) through a plurality of circuits.

3. The digital printer with ink supply circulation system according to claim 2, It is characterized in that The return ink cartridge (3) is provided with a main temperature sensor (7), and the main temperature sensor (7) is connected to a temperature control device (8) via a circuit; the auxiliary ink cartridge (13) is provided with an auxiliary temperature sensor (17), and the auxiliary temperature sensor (17) is connected to a temperature control device (8) via a circuit.

4. The digital printer with ink supply circulation system according to claim 2, It is characterized in that The temperature control assembly further comprises a BMS and a power battery, wherein the power battery is used to supply power to the main water cooling plate (5), the main heating plate (6), the auxiliary water cooling plate (15) and the auxiliary heating plate (16).

5. The digital printer with ink supply circulation system according to claim 4, It is characterized in that The BMS is connected to a main temperature sensor (7) and an auxiliary temperature sensor (17) respectively through signal lines. When the BMS charges or discharges the power battery system, the BMS monitors the main temperature sensor (7) and the auxiliary temperature sensor (17) in real time. When the difference between the main temperature sensor (7) and the auxiliary temperature sensor (17) is greater than a preset value, the BMS sends a temperature balancing instruction to the temperature control device (8).

6. The digital printer with ink supply circulation system according to claim 1, It is characterized in that The pressure control component comprises a pressure sensor (18) and a pressure relief magnetic valve (9); the pressure sensor (18) is arranged between the reflux ink cartridge (3) and the auxiliary ink cartridge (13); and the pressure sensor (18) is used to monitor the air pressure values ​​of the inner cavities of the reflux ink cartridge (3) and the auxiliary ink cartridge (13), respectively; and the pressure relief magnetic valve (9) is arranged on the reflux ink cartridge (3).

7. The digital printer with an ink supply circulation system according to claim 1, It is characterized in that The reflux ink cartridge (3) is provided with a main liquid level sensor (4) inside, and the auxiliary ink cartridge (13) is provided with an auxiliary liquid level sensor (14) inside.

Images