Ink-jet printer waste ink recovery and ink adding automatic cyclic utilization control system

Abstract

The invention discloses an ink-jet printer waste ink recycling and ink adding automatic recycling control system which comprises a main ink barrel used for supplying ink to an ink-jet printer and a recycling ink groove used for collecting waste ink generated after ink dripping and cleaning of a nozzle. The circulating ink box is connected with the ink recovery tank and is used for receiving waste ink in real time, manually adding new ink and automatically providing mixed ink formed by the waste ink and the new ink for the main ink barrel; the driving part is connected with the circulating ink box and is used for providing conveying power for the mixed ink when the ink is supplied to the main ink barrel; the filtering device is connected with the driving part and is used for filtering the mixed ink in the circulating ink box before ink is supplied to the main ink barrel; and the controller is in signal connection with the driving part. The waste ink can be added into the main ink barrel in real time and used in time after being recycled and filtered, automatic control over the normal liquid level of the main ink barrel is achieved, meanwhile, the quality of the ink is improved, and the purpose of 100% utilization of the waste ink and the ink in the ink barrel is achieved.

Description

Technical Field

[0001] The present invention relates to the field of inkjet printing equipment, and particularly to a control system for automatic recycling of waste ink and ink addition in an inkjet printer. Background Art

[0002] Nowadays, with the rapid development of China's economy and the accelerating advancement of the industrialization process, the inkjet printer industry has witnessed rapid development. On the one hand, the transformation and upgrading of domestic manufacturing industries have put forward higher requirements for inkjet printers, promoting technological progress and industrial upgrading in the industry; on the other hand, consumers' increasing attention to product quality and brand image has also contributed to the expansion of the inkjet printer market. An inkjet printer, as a non-contact marking device, operates on the principle of deflecting charged ink particles by a high-voltage electric field to spray patterns, characters, and digital codes on the surfaces of various objects. It is a high-tech product integrating mechanical and electrical technologies. Due to its efficient, accurate, and reliable printing performance, inkjet printers are widely used in the printing of product identification, production date, batch number, anti-counterfeiting code, and other information in multiple fields such as food and beverage, pharmaceutical and chemical, building materials, wire and cable, and electronic and electrical appliances.

[0003] The basic working principle of existing inkjet printers is as follows: The ink system (components such as ink tanks, filters, and pumps) provides a stable and continuous ink supply for the print head. Under the pressure of the ink supply pump, the ink is ejected through the nozzle to form a continuous ink stream. The control system precisely controls the print head to spray according to the preset inkjet content and the moving speed of the product, and sprays the ink onto the product surface in the form of tiny droplets to form the required markings.

[0004] Since the ink needs to pass through the nozzle to be sprayed onto the printing medium, the smoothness of the nozzle has a great impact on the printing quality. During long-term use, impurities and foreign objects such as residual ink, ink clumps, paper scraps, and dust accumulate at the print head, resulting in print head blockage, a decline in printing quality; severe blockage can also cause the printed image to be light in color, with stripes or shadows; at the same time, it can also shorten the lifespan of the print head. Therefore, in order to prevent print head blockage, ensure printing quality, and extend the equipment lifespan, it is necessary to regularly clean the print head according to the actual usage frequency of the equipment. Currently, the mainstream method for enterprises to regularly maintain the print head is the drip ink cleaning method, that is, using a large amount of ink (several times the ink volume during printing work) to pass through the print head to wash away the clogging impurities and foreign objects adhering to the print head, and then recycling and reusing the waste ink to save costs. The existing patented technologies for waste ink recycling and reuse include the following content:

[0005] CN206700873U discloses a waste liquid recovery device for an inkjet printing device, including a liquid discharge port. The lower end of the liquid discharge port is connected to a liquid discharge pipe. A filtering device is arranged in the liquid discharge pipe. A discharge door is arranged on the side wall of the liquid discharge pipe, and the discharge door is arranged above the filtering device. The end of the liquid discharge pipe is connected to a waste liquid collection tank.

[0006] CN109263290A discloses a waste ink recovery system based on an inkjet printer, including: a nozzle cleaning tank, a waste ink treatment bin, an ink buffer tank, and an original ink barrel; wherein, the input port of the waste ink treatment bin is connected to the waste ink output port arranged at the bottom of the nozzle cleaning tank, the output port of the waste ink treatment bin is connected to the input port of the ink buffer tank, and the output port of the ink buffer tank is connected to the input port of the original ink barrel; the nozzle cleaning tank collects the waste ink generated by nozzle cleaning. The waste ink flows out through the waste ink output port and flows into the waste ink treatment bin through the input port of the waste ink treatment bin; a filtering device is arranged in the waste ink treatment bin for filtering the waste ink flowing into the bin. The filtered ink flows out through the output port of the waste ink treatment bin and flows into the ink buffer tank through the input port of the ink buffer tank; the ink buffer tank buffers the ink flowing into the tank and flows to the original ink barrel.

[0007] CN206999903U discloses a filtering and recycling device for inkjet printing ink, including a waste ink collector, a filtering component, and an ink recycling device. The waste ink collector is connected to the ink recycling device through the filtering component; the filtering component includes a filtering pipe, a filtering pump, and a plurality of filters. Two ends of the filtering pipe are respectively connected to the waste ink collector and the ink recycling device, and the filtering pump and the plurality of filters are arranged on the filtering pipe.

[0008] As can be seen from the above patent technology, although the prior art has achieved the purpose of recycling the waste ink generated by drop ink cleaning through collection and filtration means, there are still some deficiencies in the aspect of reuse. For example, first, the recycled and filtered ink will inevitably come into contact with air during the processes of recycling, filtration, and storage, which is prone to oxidation reaction and may also be mixed with impurities, resulting in the deterioration of the ink. In addition, the amount of waste ink used for drop ink cleaning every day is relatively small, so the amount of waste ink recycled during the production process of the inkjet coding device is generally small, and it often needs to accumulate a certain amount before being added to the main ink tank of the inkjet printer. Therefore, in the process of storage, the deterioration rate of the ink will be accelerated due to harsh environments such as high temperature, high humidity, or strong light irradiation, resulting in the extremely easy deterioration of the waste ink recycled by the prior art and affecting the printing quality; second, the purpose of using waste ink is to save costs, so generally, new ink and the recycled and filtered ink (after the waste ink is qualified) are used simultaneously to reduce the addition amount of new ink. Since the ink volume in the main ink tank of the inkjet printer cannot be lower than the minimum liquid level to meet the basic working requirements of the device, when the device runs out of ink and alarms (urgent ink addition is required), the staff often directly adds new ink and forgets to add the filtered ink, resulting in the recycled and filtered ink not being used in time and losing the meaning of waste ink recycling. Third, when adding ink when the ink volume in the main ink tank reaches the low liquid level and alarms, it actually affects the normal ink use of the inkjet coding production device and causes the device to have to stop temporarily, thus directly affecting the production efficiency of the device. Fourth, during the process of adding ink to the main ink tank, paper powder is easily generated during the process of cutting the opening sealing paper of the ink tank and falls into the ink, clogging the nozzle of the inkjet printer, and there is residual ink in the ink tank, causing great waste.

[0009] Therefore, how to be able to add the waste ink to the main ink tank in real time and use it in time after recycling and filtration, avoid the deterioration of the ink, improve the use speed and utilization rate of the waste ink, avoid paper powder from entering the ink during the ink addition process, solve the problem of ink residue, and be able to ensure that the liquid level of the main ink tank of the inkjet printer is always in a normal state, realize the automatic control of waste ink recycling, filtration, and automatic ink addition as well as automatic ink addition of new ink, improve the production efficiency, and reduce the labor intensity of the staff has become a difficult problem that needs to be solved urgently by technical personnel in the sewage treatment field. Summary of the Invention

[0010] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an inkjet printer waste ink recycling and ink addition automatic recycling control system that can add the waste ink to the main ink tank in real time and use it in time after recycling and filtration, realize the automatic control of the normal liquid level of the main ink tank, improve the ink quality at the same time, and achieve the purpose of 100% utilization of waste ink and the ink in the ink tank.

[0011] To solve the above technical problems, the technical solution adopted by the present invention is: An inkjet printer waste ink recycling and ink adding automatic recycling control system, which includes a main ink tank for supplying ink to the inkjet printer, and a recycling ink tank for collecting waste ink after the nozzle is dripped and cleaned. It also includes:

[0012] A recycling ink cartridge connected to the recycling ink tank, which is used to receive waste ink in real time, manually add new ink, and automatically supply the mixed ink formed by waste ink and new ink to the main ink tank;

[0013] A driving component connected to the recycling ink cartridge, which is used to provide driving power for the mixed ink when supplying ink to the main ink tank;

[0014] A filtering device connected to the driving component, which is used to filter the mixed ink in the recycling ink cartridge before supplying ink to the main ink tank;

[0015] And a controller signal-connected to the driving component. Detection elements for detecting the lowest liquid level and the highest liquid level of the mixed ink are respectively arranged in the recycling ink cartridge and the main ink tank. After the detection element detects that the mixed ink in the recycling ink cartridge reaches the lowest liquid level, it sends a detection signal to the controller. After receiving the detection signal, the controller sends a signal for adding new ink to the staff. After the detection element detects that the amount of new ink added in the recycling ink cartridge reaches the highest liquid level, it sends a signal to the controller. After receiving the detection signal, the controller sends a signal for stopping adding new ink to the staff, and at the same time sends an ink adding signal for driving the mixed ink to output from the recycling ink cartridge, be filtered and then enter the main ink tank to the driving component. After the detection element detects that the amount of mixed ink added in the main ink tank reaches the highest liquid level, it sends a signal to the controller. After receiving the detection signal, the controller sends a stop signal to the driving component; when the detection element detects that the mixed ink in the main ink tank reaches the lowest liquid level, it sends a detection signal to the controller. After receiving the detection signal, the controller sends an ink adding signal for driving the mixed ink to output from the recycling ink cartridge, be filtered and then enter the main ink tank to the driving component. After the detection element detects that the amount of mixed ink added in the main ink tank reaches the highest liquid level, it sends a signal to the controller. After receiving the detection signal, the controller sends a stop signal to the driving component.

[0016] For the above inkjet printer waste ink recycling and ink adding automatic recycling control system, the recycling ink cartridge includes a box body with an ink cavity and a cover body. An ink inlet for manual ink adding is opened on the cover body, and a recycling ink inlet connected to the recycling ink tank for receiving waste ink in real time and an ink outlet connected to the driving component for conveying the mixed ink in the direction of the filtering device are respectively opened.

[0017] The above inkjet printer waste ink recycling and ink filling automatic recycling control system, the detection elements include first and second liquid level sensors respectively arranged in the recycling ink cartridge for detecting the lowest liquid level and the highest liquid level of the mixed ink, and both the first and second liquid level sensors are signal-connected to the controller.

[0018] The above inkjet printer waste ink recycling and ink filling automatic recycling control system, the main ink bucket includes a bucket body, and an ink filling port connected to the filtering device is opened on the bucket body. The detection elements include third and fourth liquid level sensors respectively arranged in the main ink bucket for detecting the lowest liquid level and the highest liquid level of the mixed ink, and both the third and fourth liquid level sensors are signal-connected to the controller.

[0019] The above inkjet printer waste ink recycling and ink filling automatic recycling control system, the ink outlet of the recycling ink cartridge is connected to the driving component, the filtering device and the main ink bucket in sequence through a hose.

[0020] The above inkjet printer waste ink recycling and ink filling automatic recycling control system, the driving component is an electric diaphragm pump, the controller sends an ink filling signal to the electric diaphragm pump, and the electric diaphragm pump receives the signal sent by the controller to control its start or stop.

[0021] The above inkjet printer waste ink recycling and ink filling automatic recycling control system, the filtering device includes a disc filter and a capsule filter connected in sequence through a hose. The liquid inlet of the disc filter is connected to the driving component through a hose, and the liquid outlet of the capsule filter is connected to the main ink bucket through a hose.

[0022] The above inkjet printer waste ink recycling and ink filling automatic recycling control system, the ink inlet includes a circular opening that is snap-connected and fixed to the bottle mouth of the UV ink bottle, and a spike portion for piercing the sealing paper of the UV ink bottle and fixedly connected to the inner wall of the cover body of the recycling ink cartridge is arranged in the circular opening.

[0023] The above inkjet printer waste ink recycling and ink filling automatic recycling control system, the first and second liquid level sensors are float type liquid level sensors.

[0024] The above inkjet printer waste ink recycling and ink filling automatic recycling control system, the third and fourth liquid level sensors are float type liquid level sensors.

[0025] The advantages of the waste ink recycling, ink refilling and automatic recycling control system of the inkjet printer of the present invention are as follows: The present invention replaces the waste ink bucket with a recycling ink cartridge connected to the main ink bucket, and directly connects the recycled ink tank to the recycling ink cartridge, realizing that the waste ink after drip cleaning can be recycled in real time, not only solving the problem of deterioration during the storage and filtration of waste ink, but also achieving 100% utilization of waste ink; changing the traditional direct ink refilling into the main ink bucket to ink refilling into the recycling ink cartridge, and using the means of series connection of an electric diaphragm pump, a disc filter and a bladder filter to provide power and secondary filtration, not only can effectively filter waste ink, ensure the quality of the mixed ink, but also solve the problem that the inkjet printer suddenly alarms for lack of ink and the staff urgently refills ink, resulting in equipment shutdown; by setting minimum and maximum liquid level sensors in the recycling ink cartridge and the main ink bucket, the amount of spare ink in the recycling ink cartridge and the ink in the main ink bucket can be monitored in real time, and a signal connection is established with the controller to achieve automatic control; by setting a spiked part on the recycling ink cartridge, it solves the problems that paper powder is generated when cutting the opening sealing paper of the ink bucket during the traditional ink refilling process, which falls into the ink and clogs the nozzle of the inkjet printer, and the residual ink in the ink bucket is wasted. By means of automatic control of the recycling ink cartridge and the electric diaphragm pump through the controller signal, the purpose of overall automatic waste ink recycling, utilization and ink refilling is achieved, and the waste ink can be added to the main ink bucket in real time and used in time after being recycled and filtered, avoiding ink deterioration, improving the use speed and utilization rate of waste ink, avoiding paper powder from entering the ink during the ink refilling process, solving the problem of ink residue, and being able to ensure that the liquid level of the main ink bucket of the inkjet printer is always in a normal state, realizing the automatic control of waste ink recycling, filtration and automatic ink refilling as well as automatic ink refilling of new ink, improving production efficiency, reducing the labor intensity of the staff, with a relatively low overall system cost, improving the production efficiency of the inkjet printer, saving production costs, and being suitable for industrial promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall structural schematic diagram of the present invention;

[0027] Figure 2 is the enlarged partial structural view of the recycling ink cartridge part;

[0028] Figure 3 is the enlarged partial structural view of the main ink bucket part;

[0029] Figure 4 is the enlarged partial structural view of the driving component, the filtering device and the controller;

[0030] Figure 5 is the circuit structure block diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] In the present invention, unless otherwise specified, the orientation terms such as "upper" and "lower" generally refer to the upper and lower directions in the actual use or working state of the device, specifically the drawing directions in the attached drawings; while "inner" and "outer" refer to the outline of the device. Additionally, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc. are only used as labels and do not impose numerical requirements or establish an order. The term "a plurality of" means "two or more".

[0033] As Figures 1-5 shown, a control system for automatic recycling of waste ink and ink addition in an inkjet printer includes a main ink tank 1 for supplying ink to the inkjet printer, and a recycling ink tank 3 for collecting waste ink 2 after the nozzle is dripped and cleaned. It also includes a recycling ink cartridge 4 connected to the recycling ink tank 3 for receiving waste ink 2 in real time, manually adding new ink, and automatically supplying a mixed ink formed by waste ink and new ink to the main ink tank 1; a driving component 5 connected to the recycling ink cartridge 4 for providing a conveying power for the mixed ink when supplying ink to the main ink tank 1; a filtering device 6 connected to the driving component 5 for filtering the mixed ink in the recycling ink cartridge 4 before supplying ink to the main ink tank 1; and a controller 7 signal-connected to the driving component 5.

[0034] The size of the recycling ink cartridge 4 of the present invention is 20cm * 12cm * 15.5cm. Regarding the material, since the recycling ink cartridge 4 is used to store the mixed ink formed by waste ink and new ink, it needs to meet the performance requirements of corrosion resistance and high temperature resistance. Considering the cost, stainless steel material with strong corrosion resistance, long service life, good high temperature resistance, and easy processing is adopted. Stainless steel can be welded by various processes, and the welded joints have good strength and corrosion resistance, are not easy to rust, and can reduce the manufacturing difficulty and save production costs.

[0035] Detection elements for detecting the minimum liquid level and the maximum liquid level of the mixed ink are respectively arranged inside the recycling ink cartridge 4 and the main ink tank 1. When the detection element detects that the mixed ink in the recycling ink cartridge 4 reaches the minimum liquid level 8, it sends a detection signal to the controller 7. After receiving the detection signal, the controller 7 sends a signal for adding new ink to the staff, and the staff starts to manually add new ink to the recycling ink cartridge. When the detection element detects that the amount of new ink added to the recycling ink cartridge 4 reaches the maximum liquid level 9, it sends a signal to the controller 7. After receiving the detection signal, the controller 7 sends a signal for stopping adding new ink to the staff, and at this time, the manual ink addition stops. At the same time, a signal for driving the mixed ink to output from the recycling ink cartridge 4, be filtered, and then enter the main ink tank 1 is sent to the driving component 5. At this time, the mixed ink starts to be filled into the main ink tank 1 from the recycling ink cartridge 4. When the detection element detects that the amount of mixed ink added to the main ink tank 1 reaches the maximum liquid level 13, it sends a signal to the controller 7. After receiving the detection signal, the controller 7 sends a stop signal to the driving component 5, and at this time, the automatic ink addition stops;

[0036] When the detection element detects that the mixed ink in the main ink bucket 1 reaches the lowest liquid level 12, it sends a detection signal to the controller 7. After receiving the detection signal, the controller 7 sends an ink adding signal for driving the mixed ink to output from the circulating ink cartridge 4, filter and then enter the main ink bucket 1 to the driving component 5. At this time, automatic ink adding starts. When the detection element detects that the added amount of the mixed ink in the main ink bucket 1 reaches the highest liquid level 13, it sends a signal to the controller 7. After receiving the detection signal, the controller 7 sends a stop signal to the driving component 5. At this time, the automatic ink adding stops.

[0037] Among them, the detection element includes a first liquid level sensor 10 and a second liquid level sensor 11 respectively arranged in the circulating ink cartridge 4 for detecting the lowest liquid level 8 and the highest liquid level 9 of the mixed ink, and a third liquid level sensor 14 and a fourth liquid level sensor 15 arranged in the main ink bucket 1 for detecting the lowest liquid level 12 and the highest liquid level 13 of the mixed ink. The first liquid level sensor 10, the second liquid level sensor 11, the third liquid level sensor 14 and the fourth liquid level sensor 15 are all signal-connected to the controller 7. Since the float type liquid level sensor is economical and applicable, has a wide application range, simple principle, compact structure, convenient installation and maintenance, does not require complex circuits and electronic components, and has high reliability, the first liquid level sensor 10, the second liquid level sensor 11, the third liquid level sensor 14 and the fourth liquid level sensor 15 of the present invention all select float type liquid level sensors. The working principle of the float type liquid level sensor of the present invention is: using the buoyancy of the liquid to float the float, and the sensor converts the position of the float into a corresponding electrical signal output.

[0038] The circulating ink cartridge 4 includes a box body 16 with an ink cavity and a cover body 17. An ink inlet 18 for manual ink adding is opened on the cover body 17. The ink inlet 18 includes a circular opening 19 that is snap-fitted and fixed to the bottle mouth of the UV ink bottle. A spike part 20 fixedly connected to the inner wall of the cover body 17 of the circulating ink cartridge 4 for puncturing the sealing paper of the UV ink bottle is arranged in the circular opening 19. The spike part 20 is a cross-shaped knife installed and fixed on the inner wall of the cover body 17. The ink bottle mouth can be directly inserted into the circular opening 19 for ink adding. By pressing the UV ink bottle, the sealing paper of the UV ink bottle can be cut open, and the ink can flow naturally into the ink cartridge. It avoids human contact with the ink during ink adding, which may corrode the skin, and also avoids ink waste.

[0039] An ink recovery inlet 22 for receiving waste ink 2 in real time is provided on the cover 17 and is connected to the ink recovery tank 3 through a hose 21. At the same time, an ink outlet 24 is provided, which is connected to the driving component 5 through a hose 23 and is used to convey the mixed ink towards the filtering device 6. The main ink barrel 1 includes a barrel body 25, and an ink filling port 27 connected to the filtering device 6 through a hose 26 is provided on the barrel body 25. The ink outlet of the circulating ink cartridge 4 is connected to the driving component 5, the filtering device 6, and the main ink barrel 1 in sequence through hoses.

[0040] Since the electric diaphragm pump has high durability and stability and can transport various liquids, including corrosive media and high-viscosity liquids. Therefore, the driving component 5 of the present invention selects an electric diaphragm pump, and the model selection and determination of various parameters of the electric diaphragm pump are as follows: Model: MV-SD300E (SYPDA 7W large ink pump), Voltage: 24V, Power: 7W, Flow rate: 300 ml / min, Dimensions: 76.3 mm * 53.9 mm * 30.6 mm. The controller sends an ink filling signal to the electric diaphragm pump, and the electric diaphragm pump receives the signal sent by the controller to control its start or stop.

[0041] Since the filter media of the disc filter has small fiber gaps and high conveying efficiency, it can achieve efficient and thorough filtration, and at the same time can reduce energy consumption and maintenance costs. It has strong corrosion resistance and durability. The bladder filter has the advantages of high efficiency, energy saving, stability, high filtration accuracy, and strong corrosion resistance. The bladder filter can be quickly replaced by replacing the bladder, and the cleaning process is relatively simple. Therefore, the filtering device 6 of the present invention selects a disc filter 28 and a bladder filter 29 and connects them in sequence through hoses. The liquid inlet of the disc filter 28 is connected to the driving component 5 through a hose, and the liquid outlet of the bladder filter 29 is connected to the main ink barrel 1 through a hose 26. Among them, the filtration accuracy of the disc filter: 20um, diameter: 4.5 cm, suitable connecting ink pipe: one end is connected to 6 * 4 mm and the other end is connected to 5 * 3 mm; the model of the bladder filter is B344 type, and the specific parameters and dimension standards are as follows:

[0042] Aperture accuracy 5um Maximum outer diameter 60 ± 0.3 mm Maximum length 102 ± 0.3 mm Outer diameter of the liquid inlet screw 12.6 ± 0.2 mm (2 points, 1 / 4 NPT) Outer diameter of the sewage outlet screw 9.8 ± 0.2 mm (1 / 8 NPT) Outer diameter of the liquid outlet screw 12.6 ± 0.2 mm (2 points, 1 / 4 NPT) Operating pressure Maximum operating pressure 6.5 bar Operating temperature Maximum temperature Operating temperature 50 °C

[0043] The team members carried out QR code grade standard detections on the QR codes of different cigarette label products every hour. The detection records are as follows:

[0044] Table 1 QR code quality grade standard detection record form

[0045]

[0046] Table 2 QR code quality grade standard detection record form

[0047]

[0048] From the detection records of the above two tables, it can be seen that when the waste ink recycling, ink filling automatic recycling control system of the present invention is combined with the production of the inkjet printer, the quality grades of the two-dimensional codes are all high grades. After verification, the waste ink can be used normally after filtration. After the team members completed the debugging of the device, they conducted a continuous half-month test at the production site, observed the operating conditions of the ink inlet pressure, ink return pressure, nozzle temperature, and ink cartridge temperature of the peripheral equipment controller, checked the recorded results, and the equipment data were all within the normal range, the operation was normal, and the waste ink filtration and recycling utilization rate was 100%.

[0049] Regarding the economic benefits generated by the present invention, according to the usage of the equipment in the printing workshop, an inkjet printer uses 5 nozzles for printing work at the same time. Since the number of times of cleaning the nozzles is affected by different products, on average, the amount of uv ink used for cleaning one nozzle once is about 4-5 ml. It is estimated that the nozzles need to be cleaned once every two hours. When using 5 nozzles in one shift (12 hours per shift), the operator will clean the nozzles 30 times. The waste ink generated by dripping ink cleaning in two shifts a day is about 240-300 ml. Calculated by 30 days, the waste ink generated in one month is about 7200-9000 ml. Calculated according to the current market price of uv ink at 1000 yuan / kg, the volume of 1 kg of UV ink is about 1000 ml, and the ink cost that can be saved for the enterprise in one year is about 86400-108000 yuan. It can be seen that the present invention has obvious economic value.

[0050] In summary, the present invention combines the use of new and old inks, which not only reduces the use cost of the inks, but also avoids the problem that obvious defects visible to the naked eye easily occur in information such as patterns and characters when adding old inks alone. At the same time, it realizes the real-time waste ink recycling and filtration and the automatic effect of automatically filling the filtered waste ink. At the same time, it can always ensure that the ink in the main ink tank is always at the normal amount required for the equipment operation in real time, and solves the problem that the equipment normal operation is affected due to the temporary emergency ink filling by manual operation and the resulting temporary shutdown in case of urgent ink shortage.

[0051] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A control system for recycling and automatically refilling waste ink of a printer, comprising a main ink barrel for supplying ink to the printer, and a recycling ink tank for collecting waste ink after cleaning the ink droplets from the nozzle, characterized in that: Also includes: A circulating ink box connected to the ink recovery tank for receiving waste ink in real time, manually adding new ink, and automatically providing mixed ink formed by waste ink and new ink to the main ink barrel; A driving component connected to the circulating ink cartridge and used to provide conveying power for the mixed ink when supplying ink to the main ink barrel; a filtering device connected to the driving component for filtering the mixed ink in the circulating ink cartridge before supplying ink to the main ink barrel; and a controller connected to the drive component signal, wherein detection elements for detecting the lowest liquid level and the highest liquid level of the mixed ink are respectively arranged in the circulating ink cartridge and the main ink barrel, and the detection element sends a detection signal to the controller after detecting that the mixed ink in the circulating ink cartridge reaches the lowest liquid level, and the controller sends a signal for adding new ink to the staff after receiving the detection signal, and the detection element sends a signal to the controller after detecting that the amount of new ink added in the circulating ink cartridge reaches the highest liquid level, and the controller sends a signal for stopping adding new ink to the staff after receiving the detection signal, and at the same time sends a signal for driving the mixed ink to be output from the circulating ink cartridge and filtered into the main ink barrel The ink adding signal is sent to the driving component, the detection element sends a signal to the controller after detecting that the amount of mixed ink added in the main ink barrel has reached the highest liquid level, and the controller sends a stop signal to the driving component after receiving the detection signal; the detection element sends a detection signal to the controller after detecting that the mixed ink in the main ink barrel has reached the lowest liquid level, and the controller sends an ink adding signal to the driving component for driving the mixed ink to be output from the circulating ink cartridge and filtered into the main ink barrel after receiving the detection signal, and the detection element sends a signal to the controller after detecting that the amount of mixed ink added in the main ink barrel has reached the highest liquid level, and the controller sends a stop signal to the driving component after receiving the detection signal.

2. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 1 is characterized by: The circulating ink cartridge comprises a cartridge body having an ink cavity and a cover body, the cover body being provided with an ink inlet for manual ink addition, and a recovery ink inlet connected to an ink recovery tank for real-time reception of waste ink, and an ink outlet connected to a driving component for transporting the mixed ink toward a filtering device.

3. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 1 is characterized by: The detection element comprises a first and a second liquid level sensor respectively arranged in the circulating ink cartridge for detecting the lowest liquid level and the highest liquid level of the mixed ink, and the first and the second liquid level sensors are both connected to the controller signal.

4. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 1 is characterized by: The main ink barrel includes a barrel body, on which is opened an ink filling port connected to a filtering device. The detection element includes a third and a fourth liquid level sensor respectively arranged in the main ink barrel for detecting the lowest and highest liquid levels of the mixed ink. The third and fourth liquid level sensors are both connected to the controller signal.

5. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 2 is characterized by: The ink outlet of the circulating ink box is connected with the driving component, the filtering device and the main ink barrel in sequence through a hose.

6. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 1 is characterized by: The driving component is an electric diaphragm pump, the controller sends an ink adding signal to the electric diaphragm pump, and the electric diaphragm pump receives a signal sent by the controller to control the start or stop of the electric diaphragm pump.

7. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 1 is characterized by: The filtering device comprises a disc filter and a capsule filter which are sequentially connected via a hose, wherein the liquid inlet of the disc filter is connected to a driving component via a hose, and the liquid outlet of the capsule filter is connected to a main ink barrel via a hose.

8. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 2 is characterized by: The ink inlet comprises a circular opening fixedly connected with the bottle mouth of the UV ink bottle, and a spike portion fixedly connected with the inner wall of the cover of the circulating ink box and used for piercing the sealing paper of the UV ink bottle is arranged in the circular opening.

9. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 3 is characterized by: The first and second liquid level sensors are float type liquid level sensors.

10. The control system for recycling and automatically refilling waste ink of inkjet printer according to claim 4 is characterized by: The third and fourth liquid level sensors are float type liquid level sensors.

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