CN115534527B - Ink circulation system, ink circulation control method, inkjet device and storage medium - Google Patents

Abstract

The invention discloses an ink circulation system, an ink circulation control method, an inkjet device and a storage medium, which are applied in the technical field of inkjet printing. The ink circulation system includes: a circulation assembly, including a primary ink bottle, a secondary ink bottle, and several ink paths connecting the primary ink bottle and the secondary ink bottle; The air intake pipe of the air inlet pipe is connected with the air inlet pipe of the secondary ink bottle, and is used to adjust the air pressure in the primary ink bottle and the secondary ink bottle; the control assembly includes a PLC controller, several liquid solenoid valves and several gas solenoid valves, of which , the liquid solenoid valve is installed on the ink path and connected with the PLC controller, the gas solenoid valve is installed at the intake pipe and connected with the air pressure regulating device and the PLC controller; the PLC controller is used to control the opening and closing of the liquid solenoid valve and the gas solenoid valve respectively , to control the opening and closing of the ink circuit and the pressure of the air pressure regulating device. The invention improves the operability and maintainability of the ink circulation system.

Description

Ink circulation system, ink circulation control method, inkjet device and storage medium

technical field

The invention relates to the technical field of inkjet printing, in particular to an ink circulation system, an ink circulation control method, an inkjet device and a storage medium.

Background technique

With the development of inkjet printing technology, people have higher and higher technical requirements for each subsystem of inkjet printing equipment. For example, the ink circulation system is not the core technology of inkjet printing equipment, but it is an important part. It is related to the stability of ink landing pressure, the convenience of operation, and the scalability of the number of nozzles, which directly affects the printing effect and ability. The common ink circulation system is to circulate the ink through the ink pump or the combination of the ink pump and the negative pressure ink pump. ) device micro-control flow and pressure, when increasing the number of nozzles, and then redesign the entire system.

However, the method of directly contacting the ink pump and other driving devices with the ink not only makes it difficult to guarantee the stability of the ink pressure, but also cannot realize the individual control of each ink segment, resulting in poor operability and maintainability of the ink circulation system. .

Contents of the invention

The main purpose of the present invention is to provide an ink circulation system, an ink circulation control method, an inkjet device and a storage medium. Designed to solve the problem of poor operability and maintainability of the ink circulation system.

To achieve the above object, the present invention provides an ink circulation system, the ink circulation system comprising:

A circulation assembly, including a primary ink bottle, a secondary ink bottle, and several ink paths connecting the primary ink bottle and the secondary ink bottle;

Wherein, the primary ink bottle includes a main ink bottle and a circulation bottle, the secondary ink bottle includes a secondary ink cartridge and a circulation ink cartridge, and the ink path includes a connection between the main ink bottle and the secondary ink cartridge. The ink supply path, the transfer ink path between the circulation bottle and the main ink bottle, the circulation ink path between the secondary ink box and the circulation ink box, and the circulation ink box and the circulation Ink return path between bottles;

An air pressure regulating device, the air pressure regulating device is connected with the air inlet pipe of the first-level ink bottle and the air inlet pipe of the second-level ink bottle respectively, and is used to adjust the air in the first-level ink bottle and the second-level ink bottle. air pressure;

The control assembly includes a PLC controller, several liquid solenoid valves and several gas solenoid valves, wherein the liquid solenoid valve is installed on the ink path and connected with the PLC controller, and the gas solenoid valve is installed on the The air inlet pipe is connected with the air pressure regulating device and the PLC controller; the PLC controller is used to control the opening and closing of the liquid solenoid valve and the gas solenoid valve respectively, so as to control the opening and closing of the ink path cut off and the pressure of the air pressure regulating device;

The control component is used to obtain liquid level data and air pressure data corresponding to the primary ink bottle and the secondary ink bottle, and obtain the primary ink bottle and the secondary ink bottle respectively according to the liquid level data. The ink circulation of several ink paths between the secondary ink bottles, and according to the ink circulation and the air pressure data, control the air pressure regulating device to adjust the input to the primary ink bottle and the secondary ink bottle respectively The air pressure in the ink bottle is used to form an air pressure difference between the primary ink bottle and the secondary ink bottle to drive the ink to circulate according to the circulation of the ink path.

Optionally, the circulation assembly further includes a short-circuit ink tube and a spray head, and the two ends of the short-circuit ink tube are respectively communicated with the secondary ink box and the circulation ink box and connected to the circulation ink path, so that The two ends of the spray head are respectively communicated with the secondary ink box and the circulation ink box and connected in the circulation ink path.

Optionally, the liquid solenoid valve includes several two-way liquid solenoid valves and several three-way liquid solenoid valves, wherein the two-way liquid solenoid valves are respectively arranged in the ink supply path, the transfer ink path , one end of the ink return path, and the two ends of the ink circulation path, and the three-way liquid solenoid valve is set at the two ends of the short-circuit ink tube.

Optionally, the ink circulation system further includes a detection component, the detection component includes several air pressure detection devices and several groups of liquid level monitoring devices, and the air pressure detection devices and the liquid level monitoring devices are all connected to the PLC The controller is connected to monitor the air pressure data and liquid level data of the primary ink bottle and the secondary ink bottle respectively and send them to the PLC controller.

Optionally, the air intake pipe of the primary ink bottle includes the air intake pipe of the main ink bottle and the air intake pipe of the circulation bottle, and the air intake pipe of the secondary ink bottle includes the air intake pipe of the secondary ink tank and the air intake pipe of the circulation bottle. The air intake pipe of the circulating ink cartridge, several of the air pressure detection devices are respectively arranged at the main ink bottle, the circulating bottle, the secondary ink cartridge and the air intake pipe of the circulating ink cartridge, for obtaining and The air pressure data corresponding to the main ink bottle, the circulation bottle, the secondary ink cartridge and the circulation ink cartridge; several groups of the liquid level monitoring devices are respectively arranged on the main ink bottle, the The circulation bottle, the secondary ink cartridge, and the outer wall of the circulation ink cartridge are used to obtain liquid level data corresponding to the main ink bottle, the circulation bottle, the secondary ink cartridge, and the circulation ink cartridge.

Optionally, the ink circulation system further includes a terminal device connected to the PLC controller for controlling ink circulation in the circulation component through the PLC controller.

In addition, in order to achieve the above object, the present invention also provides an ink circulation control method, the ink circulation control method is applied to the above ink circulation system, and the ink circulation control method includes the steps of:

Obtain the liquid level data and air pressure data corresponding to the primary ink bottle and the secondary ink bottle;

According to the liquid level data, the ink circulation conditions of several ink paths between the primary ink bottle and the secondary ink bottle are obtained respectively;

According to the ink circulation situation and the air pressure data, adjust the air pressure input into the primary ink bottle and the secondary ink bottle respectively, so that the air pressure between the primary ink bottle and the secondary ink bottle A pressure difference is formed to drive the ink to circulate according to the circulation of the ink path.

In addition, in order to achieve the above object, the present invention also provides an inkjet device, which includes: a memory, a processor, and an ink circulation control program stored in the memory and operable on the processor, When the ink circulation control program is executed by the processor, the steps of the above ink circulation control method are realized.

In addition, in order to achieve the above object, the present invention also provides a computer-readable storage medium, on which an ink circulation control program is stored, and when the ink circulation control program is executed by a processor, the above-mentioned The steps of the ink circulation control method.

The present invention proposes an ink circulation system, an ink circulation control method, an inkjet device, and a storage medium. Medium storage and circulation, by setting the primary ink bottle to supply ink for the secondary ink bottle. Ensure sufficient ink in the secondary ink bottle to prevent the problem of poor printing effect caused by unstable inkjet; set the air pressure adjustment device in the air intake pipe of the primary ink bottle and the secondary ink bottle to adjust the primary ink bottle. The strength of the air pressure in the first-level ink bottle and the second-level ink bottle makes the air pressure between the first-level ink bottle and the second-level ink bottle form an air pressure difference, and then drives the ink to circulate in the first-level ink bottle and the second-level ink bottle to avoid In the traditional scheme, the problem of poor ink pressure stability caused by directly connecting the ink pump in series in the ink path is solved. At the same time, by controlling the air pressure in each ink bottle and the liquid level solenoid valve in the ink path, the The individual control of the ink path is realized, which makes the whole system easy to operate and maintain; the opening and closing of the liquid solenoid valve installed on each ink path is controlled by the PLC controller (Programmable Logic Controller), and the control installed on each The opening and closing of the gas solenoid valve at the air intake pipe of an ink bottle can precisely control the connection and disconnection of each ink path, and precisely control the ink circulation in each ink path. While improving the accuracy of control, This makes each ink path easy to maintain and operate, and improves the operability and maintainability of the ink circulation system. In the ink circulation control method, by obtaining the liquid level data and air pressure data corresponding to the primary ink bottle and the secondary ink bottle; according to the liquid level data, respectively obtain the primary ink bottle and the secondary ink bottle The ink circulation of several ink paths between the bottles; according to the ink circulation and the air pressure data, adjust the air pressure input into the primary ink bottle and the secondary ink bottle respectively, so that the An air pressure difference is formed between the primary ink bottle and the secondary ink bottle to drive the ink to circulate according to the circulation of the ink path, so that individual control of each ink path in the circulation assembly can be realized, facilitating the maintenance and control of the ink path.

Description of drawings

Fig. 1 is a schematic diagram of the device structure of the hardware operating environment involved in the solution of the embodiment of the present invention;

Fig. 2 is a schematic diagram of the frame structure of the ink circulation system of the present invention;

Fig. 3 is the structural representation of the ink circulation system of the present invention;

Fig. 4 is a schematic diagram of the multi-nozzle modular design of the ink circulation system of the present invention;

Fig. 5 is the electrical network diagram of the PLC controller in the ink circulation system of the present invention;

Fig. 6 is a schematic diagram of the automatic operation logic judgment of each section of the ink circuit in the ink circulation system of the present invention;

FIG. 7 is a schematic flowchart of an embodiment of the ink circulation control method of the present invention.

Explanation of reference numbers:

label name label name 1 Primary ink bottle 2 secondary ink bottle 3 Molu 4 air pressure regulator 5 PLC controller 6 Gas Solenoid Valve 7 Liquid Solenoid Valve 8 Liquid level monitoring device 11 main ink bottle 12 recycle bottle 13 Ink isolation breather valve 14 Intake pipe twenty one secondary cartridge twenty two recycle cartridge 31 transfer ink path 32 back to ink ink road 33 Ink supply ink path 34 Circulation ink path 35 short ink tube 36 Nozzle 71 Two-way liquid solenoid valve 72 Three-way liquid solenoid valve 9 Air pressure detection device

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Please refer to FIG. 1 , which is a schematic diagram of the hardware structure of the inkjet device provided in various embodiments of the present invention. The inkjet device includes components such as a communication module 01 , a memory 02 and a processor 03 . Those skilled in the art can understand that the inkjet device shown in FIG. 1 may also include more or fewer components than shown in the illustration, or combine certain components, or arrange different components. Wherein, the processor 03 is connected to the memory 02 and the communication module 01 respectively, the memory 02 stores a computer program, and the computer program is executed by the processor 03 at the same time.

The communication module 01 can be connected with external devices through the network. The communication module 01 can receive data sent by external devices, and can also send data, instructions and information to the external devices. The external devices can be electronic devices such as mobile phones, tablet computers, notebook computers, and desktop computers.

Memory 02 can be used to store software programs and various data. The memory 02 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function, etc.; the data storage area can store data or information created according to the use of the inkjet device wait. In addition, the memory 02 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 03 is the control center of the inkjet device. It uses various interfaces and lines to connect various parts of the entire inkjet device. By running or executing the software programs and/or modules stored in the memory 02, and calling the The data in the inkjet device is executed to perform various functions and process data of the inkjet device, so as to monitor the inkjet device as a whole. The processor 03 may include one or more processing units; preferably, the processor 03 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, etc., and the modem The processor mainly handles wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 03 .

Although not shown in FIG. 1 , the above-mentioned inkjet device may further include a circuit control module, which is used to connect with the mains to realize power control and ensure the normal operation of other components.

Those skilled in the art can understand that the structure of the inkjet device shown in Figure 1 does not constitute a limitation to the inkjet device, and may include more or less components than those shown in the illustration, or combine some components, or different components layout.

The present application proposes an ink circulation system. In an embodiment of the ink circulation system, refer to FIG. 2 , which is a schematic structural diagram of the ink circulation system.

The ink circulation system includes: a circulation assembly, including a primary ink bottle 1, a secondary ink bottle 2, and several ink paths 3 connected between the primary ink bottle 1 and the secondary ink bottle 2; air pressure adjustment Device 4, the air pressure regulating device 4 is respectively connected with the air inlet pipe of the first-level ink bottle 1 and the air inlet pipe of the second-level ink bottle 2, for adjusting the first-level ink bottle 1 and the second-level ink The air pressure in the bottle 2; the control assembly includes a PLC controller 5, several liquid solenoid valves 7 and several gas solenoid valves 6, wherein the liquid solenoid valve 7 is installed on the ink path 3 and is connected with the The PLC controller 5 is connected, and the gas electromagnetic valve 6 is arranged at the inlet pipe and connected with the air pressure regulating device 4 and the PLC controller 5; the PLC controller 5 is used to control the liquid electromagnetic valve respectively. The valve 7 and the opening and closing of the gas solenoid valve 6 are used to control the opening and closing of the ink path 3 and the pressure of the air pressure regulating device 4 .

In this embodiment, the circulation component is used to realize ink circulation and inkjet function, specifically, the primary ink bottle and the secondary ink bottle are the main containers of ink, and the primary ink bottle is used to provide the secondary ink bottle For ink supply, the secondary ink bottle is used to circulate ink back to the primary ink bottle, and is used for ink ejection of the ink circulation system. Among them, the volume of the first-level ink bottle is slightly larger than that of the second-level ink bottle, which is convenient for the first-level ink bottle to add ink, store ink and supply ink, and the second-level ink bottle has a smaller volume, which is beneficial to improve the ink circulation speed. There are 2 first-level ink bottles, which are the main ink bottle and the circulation bottle, and there are 2 secondary ink bottles, which are the secondary ink cartridge and the circulation ink cartridge. Between the secondary ink tank and the main ink bottle, between the circulation ink tank and the secondary ink tank are all connected by the ink path, wherein the ink path is a pipe, and the two ends of the pipe are respectively connected with the bottom of the ink bottle, so that Ink is able to flow from the ink bottle to the tube, where it circulates. In addition, the top of the ink bottle is provided with an air inlet, and is connected with the air pressure regulating device through an air inlet pipe.

The air pressure regulating device includes a gas supply cabinet and several micro-vacuum pumps. Among them, the micro-vacuum pumps can be set in one-to-one correspondence with the main ink bottle, circulation bottle, secondary ink cartridge and circulation ink cartridge. By controlling the opening and closing of the micro-vacuum pump, they are used to adjust The air pressure in each ink bottle. There are many sets of air pressure tanks included in the gas supply cabinet, and each set of air pressure tanks includes negative pressure tanks and positive pressure tanks, and one set of air pressure tanks is connected with a miniature vacuum pump, and the miniature vacuum pump controls the opening and closing of the air pressure tanks , to realize the adjustment of the air pressure in each ink bottle, for example, increase the air pressure or reduce the air pressure, etc. After adjusting the air pressure in each ink bottle, a pressure difference can be formed in the ink bottle, thereby driving the ink in each ink bottle middle cycle. Or maintain the stable air pressure output of the air pressure regulating device, and then control the opening and closing of the gas solenoid valve through the PLC controller, such as the opening and closing state and the opening and closing degree, so as to complete the adjustment of the air pressure in each ink bottle.

The control component includes a PLC controller, several liquid level solenoid valves and several gas solenoid valves, wherein the liquid level solenoid valves are respectively arranged on the ink path, corresponding to the ink path one by one, and are used to control the opening and closing of the ink path, and then Control the circulation of ink; the gas solenoid valve is set at the intake pipe of each ink bottle, and controls the air pressure in each ink bottle together with the micro vacuum pump, and several liquid level solenoid valves, several gas solenoid valves and micro vacuum pumps are connected with the PLC The controllers are connected so that the PLC controller can respectively control several liquid level solenoid valves, several gas solenoid valves and micro vacuum pumps, and then control the overall ink circulation system to work. It should be noted that the PLC controller includes a program control module, which is used to receive the liquid level data and air pressure data in the circulation component, and then through the program control module, the opening and closing status of each liquid solenoid valve and each gas solenoid valve can be calculated. , and then automatically control the work of the ink circulation system. Please refer to Fig. 4. Fig. 4 is a schematic diagram of the multi-nozzle modular design of the present invention. The nozzle structure module in the figure includes hardware devices such as circulation components, air pressure adjustment equipment, and liquid level sensors arranged on each ink path. The nozzle program module is the PLC. The control program in the controller. By storing the control program of the ink circulation system in the PLC controller, and through hardware devices such as circulation components and air pressure adjustment devices, the expansion of the hardware device can be realized. It is only necessary to add the corresponding control program in the PLC controller, and then increase the circulation accordingly. Components, air pressure regulating devices and other equipment can realize the expansion of the nozzle structure module in the circulation component, ensuring the scalability of the ink circulation system.

In the present invention, the storage and circulation of ink in the circulation component is realized by setting the first-level ink bottle, the second-level ink bottle and several ink paths, and the second-level ink bottle is supplied with ink by setting the first-level ink bottle. Ensure sufficient ink in the secondary ink bottle to prevent the problem of poor printing effect caused by unstable inkjet; set the air pressure adjustment device in the air intake pipe of the primary ink bottle and the secondary ink bottle to adjust the primary ink bottle. The strength of the air pressure in the first-level ink bottle and the second-level ink bottle makes the air pressure between the first-level ink bottle and the second-level ink bottle form an air pressure difference, and then drives the ink to circulate in the first-level ink bottle and the second-level ink bottle to avoid In the traditional scheme, the problem of poor ink pressure stability caused by directly connecting the ink pump in series in the ink path is solved. At the same time, by controlling the air pressure in each ink bottle and the liquid level solenoid valve in the ink path, the The individual control of the ink path is realized, which makes the whole system easy to operate and maintain; the opening and closing of the liquid solenoid valve installed on each ink path is controlled by the PLC controller (Programmable Logic Controller), and the control installed on each The opening and closing of the gas solenoid valve at the air inlet pipe of the ink bottle can precisely control the connection and disconnection of each ink path, and precisely control the ink circulation in each ink path, which improves the accuracy of control and makes the Each ink path is easy to maintain and operate, which improves the operability and maintainability of the ink circulation system.

Further, the primary ink bottle includes a main ink bottle 11 and a circulation bottle 12, the secondary ink bottle includes a secondary ink cartridge 21 and a circulation ink cartridge 22, and the ink path includes connecting the main ink bottle 11 with the The ink supply path 33 between the secondary ink cartridges 21, the transfer ink path 31 that communicates between the circulation bottle 12 and the main ink bottle 11, and the transfer ink path 31 that communicates between the secondary ink cartridge 21 and the circulation ink cartridge 22 The ink circulation path 34 and the ink return path 32 communicating between the ink circulation cartridge 22 and the circulation bottle 12 .

Further, the circulation assembly also includes a short-circuit ink pipe 35 and a spray head. In ink road 34.

Please refer to Fig. 3, in the present embodiment, the top of main ink bottle 11, circulation bottle 12, secondary ink cartridge 21 and circulation ink cartridge 22 is provided with opening, is used for connecting air inlet pipe 14, at the junction of opening and air inlet pipe 14 Also be provided with the ink-separating breathable valve 13, be used to reduce the contact of gas and ink, prevent the situation that the ink in the ink bottle pours into the gas pipe simultaneously; The bottom is provided with several ink ports respectively, is used to connect other ink bottles to form the ink path, or It is used to discharge ink and add ink. Specifically, three ink ports are arranged at the bottom of the main ink bottle 11. The first ink port is an ink filling port for adding ink to the main ink bottle 11. The second ink port is The ink supply port is used to connect the secondary ink cartridge 21 to form the ink supply path 33 and supply ink to the secondary ink cartridge 21. The third ink outlet is the transfer ink port and is used to communicate with the circulation bottle 12 to form the transfer ink path 31 , used to receive the ink transferred by the circulation bottle 12; three ink ports are arranged at the bottom of the circulation bottle 12, the first ink port is used to communicate with the main ink bottle 11 to form the transfer ink path 31, and the second ink port is for ink discharge The third ink port is the ink circulation port, which is used to communicate with the ink circulation cartridge 22 to form the ink return path 32 and receive the ink return of the ink circulation cartridge 22; the bottom of the secondary ink cartridge 21 is provided with two ink ports , the first ink outlet is used to communicate with the main ink bottle 11 to form an ink supply path 33, and the second ink port is connected to the circulating ink cartridge 22 to form a circulating ink path 34; the bottom of the circulating ink cartridge 22 is provided with two ink ports. One ink port is used to communicate with the circulation bottle 12 to form the ink return path 32 , and the second ink port is used to communicate with the secondary ink cartridge 21 to form the ink circulation path 34 . Therefore, as shown in the direction of the arrow on each ink path in Figure 3, the ink circulation flow direction in the circulation assembly formed by the above-mentioned ink path and four ink bottles is to supply ink from the main ink bottle 11 to the secondary ink cartridge 21, The secondary ink cartridge 21 supplies ink to the circulation ink cartridge 22, the circulation ink cartridge 22 returns ink to the circulation bottle 12, and the circulation bottle 12 transfers the ink to the main ink bottle 11, forming a closed-loop circulation system.

In the ink circulation path 34, a spray head 36 and a short ink pipe 35 are also provided. Both ends of the spray head 36 are respectively connected to the ink circulation path 34 as the final ink supply port of the ink circulation system. The short-circuit ink pipe 35 is also connected to the circulating ink path 34 and connected in parallel with the nozzle 36, and the two ends of the short-circuit ink pipe 35 are respectively connected to a three-way liquid level solenoid valve for controlling the on-off of the short-circuit ink pipe 35 And the on-off of the shower nozzle 36. It should be noted that, during the circulation process of the ink in the secondary ink box 21 and the circulating ink box 22 , before the secondary ink box 21 is controlled to supply ink to the circulating ink box 22 , the ink needs to pass through the nozzle 36 or short-circuit the ink tube 35 . In normal printing or to-be-printed state, the ink is output from the secondary ink box 21 and flows to the circulating ink box 22 through the nozzle 36; The ink receiving pipe 35 flows to the circulating ink cartridge 22 . In addition, it should also be noted that the type of the nozzle 36 includes a single-flow nozzle and a dual-flow nozzle, and by adjusting the air pressure difference between the secondary ink cartridge 21 and the circulation ink cartridge 22, the inkjet mode of the nozzle 36 has two types, One of them is that when the air pressure difference between the secondary ink cartridge 21 and the circulating ink cartridge 22 is that the air pressure of the secondary ink cartridge 21 is greater than that of the circulating ink cartridge 22, the nozzle 36 is set as a single-flow nozzle, and the ink is located on the circulating ink path 34 as shown in Figure 3 The path shown by the arrow in the same direction as above flows from the secondary ink cartridge 21 to the circulation ink cartridge 22, thereby causing the ink to flow out from the single-flow direction nozzle; another inkjet mode is when the air pressure in the secondary ink cartridge 21 and the circulation ink cartridge 22 are the same , the pressure acting on the nozzle 36 ends is also the same. If the nozzle 36 is set to be a dual-flow nozzle 36, the ink will flow from the secondary ink cartridge 21 and the circulation ink cartridge 22 as shown by the arrows in the lower direction of the ink circulation path in Figure 3. Flow out, and then flow out through the dual-flow nozzle 36. When it is necessary to replace the nozzle 36, first switch the state of the three-way liquid level valve to shield the nozzle 36, open the short-circuit ink pipe 35, so that the ink circulates in the short-circuit ink pipe 35, and then modify the secondary ink cartridge 21 and the circulation ink cartridge 22 The air pressure value, so that both sides act on the same pressure on the nozzle 36 ends, then replace the nozzle 36, and finally shield the short-connected ink tube 35, open the nozzle 36, and complete the replacement of the nozzle 36. In addition, the secondary ink cartridge 21 and the circulating ink cartridge 22 can be placed at the same level, so that the pressure applied to the end of the nozzle 36 is the same, and then the nozzle 36 can be replaced. In the present invention, by arranging parallel short-circuited ink pipes 35 and nozzles 36 , the circulating ink path 34 of the nozzles 36 can be shielded, which facilitates the replacement and maintenance of the inkjet nozzles 36 .

Further, the liquid solenoid valve includes several two-way liquid solenoid valves 71 and several three-way liquid solenoid valves 72, wherein the two-way liquid solenoid valves 71 are respectively arranged in the ink supply path 33, the One end of the transfer ink path 31 , the ink return path 32 , and both ends of the circulation ink path 34 are arranged, and the three-way liquid solenoid valve is arranged at both ends of the short-circuit ink pipe 35 .

In this embodiment, the two-way liquid solenoid valve 71 is arranged at one end of the ink supply path 33 , the transfer ink path 31 and the ink return path 32 to realize the on-off of each ink path. The three-way liquid solenoid valve 72 is set in the ink circulation path 34 for communicating with the short-circuited ink pipe 35 and shielding the nozzle circulation ink path 34 or for connecting the nozzle circulation ink path 34 and shielding the short-circuit ink pipe 35 . By setting a liquid solenoid valve in each ink path, individual control of each ink path can be realized, which is convenient for operation and disassembly, and at the same time, it is convenient to expand the nozzle without dismantling the entire ink circulation system, improving the efficiency of the ink circulation system Operability. In addition, a two-way liquid electromagnetic valve 71 can also be arranged at the pipeline connected to the ink filling port of the main ink bottle 11 and the ink discharge port of the circulation bottle 12 to control the pipelines of the ink filling port and the ink discharge port respectively. on and off.

Further, the ink circulation system also includes a detection component, the detection component includes several air pressure detection devices 9 and several groups of liquid level monitoring devices 8, and the air pressure detection devices 9 and the liquid level monitoring devices 8 are all compatible with The PLC controller is connected;

Further, several air pressure detection devices 9 are respectively arranged at the air intake pipe 14 of the main ink bottle 11, the circulation bottle 12, the secondary ink cartridge 21 and the circulation ink cartridge 22, for obtaining Air pressure data corresponding to the main ink bottle 11, the circulation bottle 12, the secondary ink cartridge 21 and the circulation ink cartridge 22; several groups of the liquid level monitoring devices 8 are respectively arranged at the preset height difference On the outer wall of the main ink bottle 11, the circulation bottle 12, the secondary ink cartridge 21 and the circulation ink cartridge 22, it is used to obtain the 21 and the liquid level data corresponding to the circulation cartridge 22.

In this embodiment, the air pressure detection device 9 is an air pressure sensor, the number of which is 4, which are respectively arranged in one-to-one correspondence with the main ink bottle, the circulation ink bottle, the secondary ink cartridge and the circulation ink cartridge, and are arranged at the air intake pipe for use To detect the air pressure data of the main ink bottle, circulating ink bottle, secondary ink cartridge and circulating ink cartridge, and send the air pressure data to the PLC controller. The liquid level monitoring device is a liquid level sensor, which specifically includes 4 groups of liquid level sensors, which are arranged in one-to-one correspondence with the main ink bottle, the circulating ink bottle, the secondary ink cartridge and the circulating ink cartridge, wherein the main ink bottle and the circulating ink bottle are arranged on the There are 2 liquid level sensors in each group, including high liquid level sensor and low liquid level sensor. The lower part of the bottle is used to monitor the liquid level changes of the main ink bottle and the circulation bottle, and send it to the PLC controller. The specific height of the setting can be set by those skilled in the art, and the present invention is not limited here. In addition, each group of sensors set on the secondary ink cartridge and the circulation ink cartridge is 3, including a high liquid level sensor, a medium liquid level sensor and a low liquid level sensor, which are respectively set on the secondary ink cartridge and the circulation ink cartridge bottle at a preset height The high, middle and low positions of the body are used to monitor the liquid level change signal of the secondary ink cartridge and the circulating ink cartridge, and send it to the PLC controller.

It should be noted that the liquid level sensor is a normally open sensor with an indicator light, and includes two states of light and dark. When the liquid level sensor is on, it means that a signal is detected, that is, the liquid level is detected; When the sensor is dark, it means that no signal is detected, that is, no liquid level is detected. In the automatic control mode of the ink circulation system, the PLC controller can automatically control the opening and closing of the liquid level solenoid valves in each ink path through the liquid level change of the liquid level sensor, and then control the on-off of each ink path. Specifically, as shown in Figure 6, Figure 6 is a schematic diagram of the automatic operation logic judgment of each section of the ink circuit in the ink circulation system of the present invention. The PLC controller is provided with automatic operation logic. In (c) in Figure 6, the main When the high liquid level sensor in the ink bottle is on, it indicates that the ink in the main ink bottle is sufficient, and the PLC controller closes the solenoid valve in the transfer ink path, stops the circulation bottle and transfers the ink to the main ink bottle, preventing the ink in the main ink bottle from The liquid level is too high; when the low liquid level sensor in the main ink bottle is dark, it indicates that the ink in the main ink bottle is lacking, and the PLC controller opens the liquid level solenoid valve in the transfer ink path to transfer the ink in the circulation bottle to the main ink bottle. In the ink bottle. In (d) of Figure 6, when the high liquid level sensor in the circulation bottle is on, it indicates that the ink in the circulation bottle is sufficient, then close the ink return path, and stop circulating the ink in the circulation cartridge to the circulation bottle; If the high liquid level sensor in the circulation bottle is dark, it indicates that the ink in the circulation bottle is insufficient, then open the ink return path to circulate the ink in the circulation cartridge to the circulation bottle. In (a) of Figure 6, if the medium level sensor on the secondary ink tank is on, it means that the ink in the secondary ink tank is sufficient, and the PLC controller will close the ink supply path and stop the main ink bottle from supplying to the secondary ink tank. The ink cartridge supplies ink; if the medium level sensor on the secondary ink cartridge is dark, it means that the ink in the secondary ink cartridge is insufficient, and the PLC controller opens the ink supply path so that the main ink bottle supplies ink to the secondary ink cartridge. In (b) of Figure 6, if the medium liquid level sensor on the circulating ink cartridge is on, it means that the ink in the circulating ink cartridge is sufficient, and the circulating ink path is opened to circulate the ink to the secondary ink cartridge; When the middle liquid level sensor is dark, it means that the ink in the circulating ink cartridge is insufficient, then close the circulating ink path and stop the ink circulation. In addition, when it detects that the low liquid level sensor in the main ink bottle and the circulation bottle is dark, it means that the ink is too low, and an alarm is sent to remind the administrator to add ink. And when it detects that the high level sensor of the secondary ink tank and the circulating ink tank is bright, it means that there is too much ink, or when it detects that the low level sensor of the secondary ink tank and the circulating ink tank is dark, it means that the ink is too low. Alerts are issued for management to take action. In the present invention, by setting the liquid level monitoring device, it is used to detect the change of the liquid level in each ink bottle, and the change is used as the judgment condition of the ink path circulation, to ensure the stability of the ink in each ink bottle, and to further ensure the inkjet performance. Stability, to ensure the effect of inkjet printing.

Further, the ink circulation system further includes a terminal device, the terminal device is connected to the PLC controller, and is used to control the circulation of ink in the circulation component through the PLC controller. The terminal device can be a device with a human-computer interaction interface such as a computer, a mobile phone, or a tablet. When the ink circulation system is in the manual control mode, the manager can select different ink paths in the ink circulation system through the terminal device for separate control. Manual control can be realized through buttons and keys connected to the PLC controller, which makes the ink circulation system more operable and realizes the switching between manual control mode and automatic control mode.

The specific embodiments of the inkjet device of the present invention are basically the same as the embodiments of the ink circulation control program described below, and will not be repeated here.

Please refer to FIG. 7. FIG. 7 is a schematic flowchart of the first embodiment of the ink circulation control method of the present invention. The ink circulation control method provided in this embodiment includes the following steps:

Step S10, obtaining liquid level data and air pressure data corresponding to the primary ink bottle and the secondary ink bottle;

In this embodiment, the primary ink bottle includes a main ink bottle and a recirculation bottle, and the secondary ink bottle includes a secondary ink cartridge and a recirculation cartridge. The liquid level data includes the detection signal of the high liquid level sensor set on the main ink bottle and the circulation bottle, that is, the light and dark changes of the high liquid level sensor in the above embodiment, and also includes the detection signal passed through the secondary ink tank and the high level sensor. Circulating the detection signal of the middle liquid level sensor on the ink cartridge, that is, the light and dark changes of the middle liquid level sensor described in the above embodiment.

Step S20, according to the liquid level data, obtain the ink circulation conditions of several ink paths between the primary ink bottle and the secondary ink bottle;

In this embodiment, the ink path includes an ink supply path, an ink transfer path, an ink return path and an ink circulation path. The ink circulation situation includes the on-off situation of the ink supply ink path, the on-off situation of the transfer ink path, the on-off situation of the ink return path and the on-off situation of the ink circulation path. Specifically, in the automatic control mode of the ink circulation system, the PLC controller can automatically control the opening and closing of the liquid level solenoid valves in each ink path through the change of the liquid level of the liquid level sensor, and then control the on-off of each ink path . Specifically, as shown in Figure 6, the PLC controller is equipped with automatic operation logic. In (c) in Figure 6, when the high liquid level sensor in the main ink bottle is on, it indicates that the ink in the main ink bottle is sufficient , the PLC controller closes the electromagnetic valve in the transfer ink path, stops the circulation bottle and transfers the ink to the main ink bottle to prevent the ink level in the main ink bottle from being too high; when the low liquid level sensor in the main ink bottle is in the dark, Indicating that the ink in the main ink bottle is lacking, the PLC controller opens the liquid level solenoid valve in the transfer ink path, and transfers the ink in the circulation bottle to the main ink bottle. In (d) of Figure 6, when the high liquid level sensor in the circulation bottle is on, it indicates that the ink in the circulation bottle is sufficient, then close the ink return path, and stop circulating the ink in the circulation cartridge to the circulation bottle; If the high liquid level sensor in the circulation bottle is dark, it indicates that the ink in the circulation bottle is insufficient, then open the ink return path to circulate the ink in the circulation cartridge to the circulation bottle. In (a) of Figure 6, if the medium level sensor on the secondary ink tank is on, it means that the ink in the secondary ink tank is sufficient, and the PLC controller will close the ink supply path and stop the main ink bottle from supplying to the secondary ink tank. The ink cartridge supplies ink; if the medium level sensor on the secondary ink cartridge is dark, it means that the ink in the secondary ink cartridge is insufficient, and the PLC controller opens the ink supply path so that the main ink bottle supplies ink to the secondary ink cartridge. In (b) of Figure 6, if the medium liquid level sensor on the circulating ink cartridge is on, it means that the ink in the circulating ink cartridge is sufficient, and the circulating ink path is opened to circulate the ink to the secondary ink cartridge; When the middle liquid level sensor is dark, it means that the ink in the circulating ink cartridge is insufficient, then close the circulating ink path and stop the ink circulation.

Step S30, according to the ink circulation situation and the air pressure data, respectively adjust the air pressure input into the primary ink bottle and the secondary ink bottle, so that the primary ink bottle and the secondary ink bottle An air pressure difference is formed between the bottles to drive the ink to circulate according to the circulation of the ink path.

In this embodiment, if the ink circuit circulation condition is that the main ink bottle supplies ink to the secondary ink cartridge, the PLC controller adjusts the air pressure regulating device so that the air pressure in the main ink bottle is greater than that of the secondary ink cartridge, so that the ink flows from The main ink bottle flows to the secondary ink box; if the ink circulation condition is that the circulation bottle transfers ink to the main ink bottle, adjust the air pressure regulating device so that the air pressure in the circulation bottle is greater than the main ink bottle, so that the ink flows from the circulation bottle to the main ink bottle. bottle flow; if the ink path circulation is that the secondary ink cartridge circulates ink to the circulating ink cartridge, adjust the air pressure of the secondary ink cartridge to be greater than the circulating ink cartridge so that the ink flows from the secondary ink cartridge to the circulating ink cartridge; if the ink path circulation is that the circulating ink cartridge flows to the circulating bottle For ink return, adjust the air pressure of the circulation ink cartridge to be greater than the air pressure of the circulation bottle so that the ink flows from the circulation ink cartridge to the circulation bottle. In addition, the ink flow rate can also be adjusted by changing the air pressure difference in the two ink bottles.

In the present invention, by obtaining the liquid level data and air pressure data corresponding to the primary ink bottle and the secondary ink bottle; according to the liquid level data, respectively obtain the The ink circulation of several ink paths between them; according to the ink circulation and the air pressure data, adjust the air pressure input to the primary ink bottle and the secondary ink bottle respectively, so that the primary An air pressure difference is formed between the ink bottle and the secondary ink bottle to drive the ink to circulate according to the circulation of the ink path. The stability of the ink pressure can be improved, the independent control of each section of the ink path can be realized, and the maintenance and control of the ink path can be facilitated.

The present invention also proposes a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium can be the memory 02 in the inkjet device of FIG. 1. At least one of optical discs, the computer-readable storage medium includes information for enabling the inkjet device to execute the methods described in the various embodiments of the present invention.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (8)

1. A kind of ink circulation system, is characterized in that, described ink circulation system comprises: A circulation assembly, including a primary ink bottle, a secondary ink bottle, and several ink paths connecting the primary ink bottle and the secondary ink bottle; Wherein, the primary ink bottle includes a main ink bottle and a circulation bottle, the secondary ink bottle includes a secondary ink cartridge and a circulation ink cartridge, and the ink path includes a connection between the main ink bottle and the secondary ink cartridge. The ink supply path, the transfer ink path between the circulation bottle and the main ink bottle, the circulation ink path between the secondary ink box and the circulation ink box, and the circulation ink box and the circulation Ink return path between bottles; An air pressure regulating device, the air pressure regulating device is connected with the air inlet pipe of the first-level ink bottle and the air inlet pipe of the second-level ink bottle respectively, and is used to adjust the air in the first-level ink bottle and the second-level ink bottle. air pressure; The control assembly includes a PLC controller, several liquid solenoid valves and several gas solenoid valves, wherein the liquid solenoid valve is installed on the ink path and connected with the PLC controller, and the gas solenoid valve is installed on the The air inlet pipe is connected with the air pressure regulating device and the PLC controller; the PLC controller is used to control the opening and closing of the liquid solenoid valve and the gas solenoid valve respectively, so as to control the opening and closing of the ink path cut off and the pressure of the air pressure regulating device; The control component is used to obtain liquid level data and air pressure data corresponding to the primary ink bottle and the secondary ink bottle, and obtain the primary ink bottle and the secondary ink bottle respectively according to the liquid level data. The ink circulation of several ink paths between the secondary ink bottles, and according to the ink circulation and the air pressure data, control the air pressure regulating device to adjust the input to the primary ink bottle and the secondary ink bottle respectively The air pressure in the middle, so that the air pressure difference is formed between the first-level ink bottle and the second-level ink bottle, and the ink is driven to circulate according to the circulation of the ink path; The circulation assembly also includes a short-connected ink tube and a spray head. connected to the secondary ink box and the circulation ink box and connected to the circulation ink path, and the nozzles include a single-flow nozzle and a dual-flow nozzle for Different inkjet modes can be switched by the air pressure difference between them. 2. The ink circulation system according to claim 1, wherein the liquid solenoid valve comprises several two-way liquid solenoid valves and several three-way liquid solenoid valves, wherein the two-way liquid solenoid valves are respectively set At one end of the ink supply ink path, the transfer ink path, and the ink return path, and at both ends of the ink circulation path, the three-way liquid solenoid valve is arranged at the short-circuit ink both ends of the tube. 3. The ink circulation system according to claim 2, characterized in that, the ink circulation system also includes a detection assembly, the detection assembly includes several air pressure detection devices and several groups of liquid level monitoring devices, and the air pressure detection device and the liquid level monitoring device are both connected to the PLC controller, and are used to monitor the air pressure data and liquid level data of the primary ink bottle and the secondary ink bottle respectively and send them to the PLC controller. 4. ink circulation system as claimed in claim 3, is characterized in that, the air inlet pipe of described primary ink bottle comprises the air inlet pipe of described main ink bottle and the air inlet pipe of described circulation bottle, and described secondary ink bottle The air intake pipe includes the air intake pipe of the secondary ink cartridge and the air intake pipe of the circulation ink cartridge, and several air pressure detection devices are respectively arranged on the main ink bottle, the circulation bottle, the secondary ink cartridge and the The air intake pipe of the circulation ink cartridge is used to obtain the air pressure data corresponding to the main ink bottle, the circulation bottle, the secondary ink cartridge and the circulation ink cartridge; several groups of the liquid level monitoring devices are used to predict Suppose that the height difference is respectively arranged on the outer walls of the main ink bottle, the circulation bottle, the secondary ink cartridge and the circulation ink cartridge, so as to obtain a connection with the main ink bottle, the circulation bottle, and the secondary The liquid level data corresponding to the ink cartridge and the circulating ink cartridge. 5. The ink circulation system according to claim 1, characterized in that, the ink circulation system also includes a terminal device, the terminal device is connected with the PLC controller, and is used to control the ink flow through the PLC controller. loop in the loop assembly. 6. An ink circulation control method, characterized in that the ink circulation control method is applied to the ink circulation system according to any one of claims 1 to 5, and the ink circulation control method comprises the steps of: Obtain the liquid level data and air pressure data corresponding to the primary ink bottle and the secondary ink bottle; According to the liquid level data, the ink circulation conditions of several ink paths between the primary ink bottle and the secondary ink bottle are obtained respectively; According to the ink circulation situation and the air pressure data, adjust the air pressure input into the primary ink bottle and the secondary ink bottle respectively, so that the air pressure between the primary ink bottle and the secondary ink bottle A pressure difference is formed to drive the ink to circulate according to the circulation of the ink path. 7. An inkjet device, characterized in that the inkjet device comprises: a memory, a processor, and an ink circulation control program stored on the memory and operable on the processor, the ink circulation control program The steps of the ink circulation control method as claimed in claim 6 are implemented when the program is executed by the processor. 8. A storage medium, wherein an ink circulation control program is stored on the storage medium, and when the ink circulation control program is executed by a processor, the steps of the ink circulation control method according to claim 6 are implemented.

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