Integrated liquid cooling system of printing equipment, printing equipment and temperature adjusting method of printing equipment

Abstract

The invention relates to the technical field of ink-jet printing, in particular to a printing equipment integrated liquid cooling system, printing equipment and a temperature adjusting method of the printing equipment. The printing equipment integrated liquid cooling system comprises a main cooling control unit which comprises a main cooling water tank, a refrigerating device, a first heat exchange device and a first conveying pipeline, and the first conveying pipeline is used for conveying liquid in the main cooling water tank to a water cooling roller; the normal-temperature control unit comprises a normal-temperature water tank, a second heat exchange device and a second conveying pipeline, and the second conveying pipeline is used for conveying liquid in the normal-temperature water tank to a board card heat dissipation plate of the printing equipment; and the constant-temperature control unit comprises a constant-temperature water tank, a third heat exchange device and a third conveying pipeline, at least one part of the third heat exchange device is located in the constant-temperature water tank, and the third conveying pipeline is used for conveying liquid in the constant-temperature water tank to a spray head bottom plate of the printing equipment. The temperature of different areas of the printing equipment can be independently adjusted.

Description

[0001] This application is a divisional application of the invention patent application filed on September 5, 2024, with the invention name “Printing equipment liquid cooling system and printing equipment temperature adjustment method” and application number 202411243653.2. Technical Field

[0002] The present invention relates to the technical field of inkjet printing, and in particular to an integrated liquid cooling system for a printing device, a printing device and a temperature regulation method thereof. Background Art

[0003] As the speed of inkjet printing equipment increases, the corresponding data processing volume and the workload of the printhead will increase, especially in double-sided printing equipment, which needs to dry after printing on one side before printing on the other side. In short, the faster the speed of inkjet printing equipment, the higher the production capacity, which will bring about various power consumption increases and heat increases. If the increased heat is not removed in time, it will bring various unstable factors to the inkjet printing equipment, thereby affecting the quality of inkjet printing.

[0004] Printing equipment often has multiple working devices, each of which has different functions. These working devices work together to realize the complete functions of the printing equipment. Some of these working devices will generate heat that affects the printing equipment. For example, the nozzle driver board that controls the nozzle to spray ink, the nozzle used for inkjet, and the paper path used to transport the printing medium will all generate heat.

[0005] Among them, the nozzle driver board mainly converts the data signal into a circuit signal to drive the piezoelectric crystal of the nozzle to perform inkjet action. As the printing speed increases, the conversion frequency of the data signal will gradually increase, so the heat generated by the drive circuit will increase sharply and can reach above 120°C. Conventional driver boards generally use heat sinks for heat dissipation. The heat dissipation method of heat sinks has low heat dissipation efficiency and is not suitable for long-term heat dissipation under high loads. Therefore, some fans are added to the heat sink to assist the flow and speed up the air flow to further remove the heat. However, this method will be affected by environmental factors. Therefore, its heat dissipation capacity is better than the automatic heat dissipation of the heat sink. It can only be used in some low-speed inkjet application scenarios. Secondly, in most application scenarios, the driver board is installed near the nozzle, and the heat dissipated by the above two methods will affect the working environment of the nozzle.

[0006] Because the working frequency of the nozzle is close to the limit when printing at high speed, the high-frequency PZT oscillation will cause the nozzle temperature to rise continuously. When the nozzle temperature rises, on the one hand, the workability of PZT is reduced, and on the other hand, the viscosity of the ink in the nozzle is reduced. After the viscosity changes, the oscillation amplitude of PZT needs to be adjusted, but the temperature changes quickly. If the oscillation amplitude cannot be adjusted in time, it will cause unstable injection. Some nozzles use the temperature viscosity change curve to control the oscillation amplitude in real time. Due to insufficient control accuracy, it is difficult to achieve good results.

[0007] When printing on both sides, the printed image and text on one side needs to be dried before printing on the second side. Due to the high-speed operation of the paper path, the dried paper tape has not completely dissipated the heat before printing on the second side. At this time, the temperature of the paper tape will radiate to the nozzle, which will affect the working temperature of the nozzle again. At the same time, it also increases the temperature rise of the nozzle, which is also a key factor in the uncontrollable temperature of the nozzle. Usually, the paper path is extended to cool the paper path by adding fans; or the paper path is cooled by adding water-cooling rollers. However, due to the working state of the paper path, it is not combined with the printing system. When it is stopped, due to the low temperature of the water-cooling roller, condensation is easily formed. After the paper tape absorbs water, it breaks under the support of tension.

[0008] Although there are cooling facilities that can cool down and dissipate heat for a certain working device, a printing device often has multiple working devices that need heat dissipation and cooling during operation, and the heat dissipation requirements are different. Therefore, the current cooling measures for printing devices cannot achieve effective heat dissipation and cooling of multiple working devices of the printing device in a relatively simple way. Summary of the invention

[0009] In view of this, the present invention provides an integrated liquid cooling system for a printing device, a printing device and a temperature adjustment method thereof, which are used to solve the technical problem that the existing printing device cannot independently adjust the temperature of different areas of the printing device.

[0010] The technical solution adopted by the present invention is:

[0011] In a first aspect, the present invention provides an integrated liquid cooling system for a printing device, comprising:

[0012] A main cooling control unit comprises a main cooling water tank, a refrigeration device, a first heat exchange device and a first delivery pipeline, wherein the first heat exchange device is located in the main cooling water tank, the first heat exchange device is connected to the refrigeration device, the refrigerant cooled by the refrigeration device exchanges heat with the liquid in the main cooling water tank in the first heat exchange device and then flows back to the refrigeration device, and the first delivery pipeline is used to deliver the liquid in the main cooling water tank to the water-cooled roller;

[0013] A normal temperature control unit, comprising a normal temperature water tank, a second heat exchange device and a second delivery pipeline, wherein at least a portion of the second heat exchange device is located in the normal temperature water tank, an inlet of the second heat exchange device is connected to a main cold water tank, an outlet of the second heat exchange device is connected to a main cold water tank body, and the second delivery pipeline is used to deliver liquid in the normal temperature water tank to a heat sink of a board of a printing device;

[0014] A constant temperature control unit, comprising a constant temperature water tank, a third heat exchange device and a third delivery pipeline, wherein at least a portion of the third heat exchange device is located in the constant temperature water tank, an inlet of the third heat exchange device is connected to a main cold water tank, an outlet of the third heat exchange device is connected to the main cold water tank, and the third delivery pipeline is used to deliver the liquid in the constant temperature water tank to the nozzle bottom plate of the printing device;

[0015] The refrigeration device comprises a condenser and a compressor. One end of the first heat exchange device is connected to the condenser, and the other end opposite thereto is connected to the other end of the condenser through the compressor.

[0016] Preferably, a first switch is provided on the pipeline connecting the compressor and the condenser.

[0017] Preferably, the first heat exchange device is a coil.

[0018] Preferably, the main cooling control unit also includes a main cooling circulation pump, the inlet of the main cooling circulation pump is connected to the interior of the main cooling water tank through a first delivery pipeline, the outlet of the main cooling circulation pump is connected to the liquid inlet of the water-cooling roller through the first delivery pipeline, the liquid outlet of the water-cooling roller is connected to the interior of the main cooling water tank through the first delivery pipeline, the liquid cooling system controls the flow rate of the main cooling circulation pump according to the temperature of the water-cooling roller, and the main cooling control unit also includes a first temperature sensor, which is used to detect the temperature of the liquid in the main cooling water tank.

[0019] Preferably, there are multiple first temperature sensors, and at least one first temperature sensor is respectively arranged at the upper part and the lower part of the main cold water tank.

[0020] Preferably, the normal temperature control unit further comprises a second temperature sensor and a first heating device, wherein the second temperature sensor is used to detect the temperature of the liquid in the normal temperature water tank, and the portion of the first heating device used for heating is located in the normal temperature water tank.

[0021] In a second aspect, the present invention further provides a method for adjusting the temperature of a printing device, using the integrated liquid cooling system for the printing device described in the first aspect to adjust the temperature of different areas of the printing device, the method comprising:

[0022] S1: Get the current printing speed of the printing device;

[0023] S2: adjusting the flow rate of the first delivery pipeline according to the printing speed of the printing device;

[0024] S3: Get the current ambient temperature;

[0025] S4: Get the actual temperature of the board of the printing device;

[0026] S5: adjusting the flow rate of the second delivery pipeline according to the current ambient temperature and the actual temperature of the board;

[0027] S6: Obtaining the preset temperature of the nozzle of the printing device when it is working;

[0028] S7: Obtaining the actual temperature of the nozzle of the printing device when it is working;

[0029] S8: adjusting the flow rate of the third delivery pipeline according to the preset temperature of the nozzle of the printing device when it is working and the actual temperature of the nozzle of the printing device when it is working.

[0030] Preferably, the step S2: adjusting the flow rate of the first delivery pipeline according to the printing speed of the printing device further comprises:

[0031] S21: Obtaining a corresponding relationship curve between the printing speed and the flow rate of the first conveying pipeline;

[0032] S22: determining a target flow rate of the first delivery pipeline according to the current printing speed of the printing device and the corresponding relationship curve;

[0033] S23: adjusting the current flow rate of the first delivery pipeline to the target flow rate.

[0034] Preferably, the step S5: adjusting the flow of the second delivery pipeline according to the current ambient temperature and the actual temperature of the board also includes:

[0035] S51: Obtaining a corresponding relationship curve between the board temperature and the flow rate of the second delivery pipeline;

[0036] S52: determining a target flow rate of the second delivery pipeline according to the actual temperature of the board and the corresponding relationship curve;

[0037] S53: Adjust the current flow rate of the second delivery pipeline to the target flow rate.

[0038] In a third aspect, the present invention further provides a printing device, comprising the integrated liquid cooling system for the printing device as described in the first aspect, wherein the integrated liquid cooling system for the printing device, the liquid cooling control system uniformly controls the main cooling control unit, the normal temperature control unit, and the constant temperature control unit, the printing device also includes a printing system, a paper path operation control system, and a printing mechanism control system, and the printing system communicates with the printing mechanism control system and the paper path operation control system respectively.

[0039] Beneficial effects: The integrated liquid cooling system of the printing device, the printing device and the temperature adjustment method thereof of the present invention utilize the main cooling control unit, the normal temperature control unit and the constant temperature control unit to respectively adjust the temperature of the paper path, the board and the nozzle of the printing device. The temperature of the liquid in the main cold water tank is adjusted by the refrigeration device, so that the temperature of the main cold water tank is maintained at a set lower temperature and lower than the temperature of the normal temperature water tank and the constant temperature water tank. The liquid in the main cold water tank is used to cool the paper path, and the liquid in the main cold water tank is introduced into the second heat exchange device arranged in the normal temperature water tank to cool the liquid in the normal temperature water tank, thereby adjusting the temperature of the liquid in the normal temperature water tank, and the liquid in the normal temperature water tank is used to adjust the temperature of the board. The liquid in the main cold water tank is introduced into the third heat exchange device arranged in the constant temperature water tank to cool the liquid in the constant temperature water tank, thereby adjusting the temperature of the liquid in the constant temperature water tank, and the liquid in the constant temperature water tank is used to adjust the nozzle temperature. Since the three temperature adjustment units use liquids stored in different water tanks to pass into different cooling parts of the printing equipment, the temperature of different areas of the printing equipment can be adjusted independently, thereby meeting the needs of accurate temperature adjustment of various areas of the printing equipment. In addition, since the invention uses the liquid in the main cold water tank to adjust the temperature of the liquid in the normal temperature water tank and the constant temperature water tank, the three temperature adjustment units form an integrated cooling system, so that the entire system only needs one set of refrigeration device to independently adjust the temperature of the paper path, board and nozzle, so it is simple in structure, easy to control and lower in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0041] Figure 1 It is a schematic diagram of the liquid cooling system of the printing device of the present invention;

[0042] Figure 2 This is a schematic diagram of the main cooling control unit in the present invention;

[0043] Figure 3 It is a schematic diagram of the normal temperature control unit in the present invention;

[0044] Figure 4 It is a schematic diagram of the constant temperature control unit in the present invention;

[0045] Figure 5 A schematic diagram of a process for adjusting the temperature of a printing device according to the present invention;

[0046] Figure 6 It is a flow chart of a method for controlling the temperature of a water-cooling roller according to a printing end time of the present invention;

[0047] Figure 7 It is a flow chart of a method for controlling the temperature of a board card under the condition of maximum flow rate of the present invention;

[0048] Figure 8 It is a flow chart of the method for controlling the temperature of the nozzle under the condition of maximum flow rate of the present invention;

[0049] Fig. 9 A schematic flow chart of the method of each system of the printing device of the present invention;

[0050] Fig.10 It is a schematic diagram of the three-dimensional structure of the water-cooled roller of the present invention;

[0051] Fig.11 It is a schematic structural diagram of the internal liquid flow channel of the water-cooled roller of the present invention;

[0052] Fig.12 It is a structural schematic diagram of the liquid cooling flow path in the water-cooling roller of the present invention;

[0053] Parts and their numbers in the figure:

[0054] Main cooling control unit 1, main cooling water tank 11, condenser 12, first switch 121, second switch 122, compressor 13, first heat exchange device 14, first delivery pipeline 15, main cooling circulation pump 16, first temperature sensor 17, first liquid level switch 18, first flow switch 19, normal temperature control unit 2, normal temperature water tank 21, second heat exchange device 22, second delivery pipeline 23, normal temperature circulation pump 241, second flow switch 242, fourth delivery pipeline 25, first delivery pump 261, fourth flow switch 26 2. second temperature sensor 27, first heating device 28, second liquid level switch 29, constant temperature control unit 3, constant temperature water tank 31, third heat exchange device 32, third delivery pipeline 33, fifth delivery pipeline 34, third flow switch 351, constant temperature circulation pump 352, third temperature sensor 36, second heating device 37, third liquid level switch 38, fifth flow switch 391, second delivery pump 392, water-cooled roller 4, board heat sink 5, nozzle bottom plate 6, water-cooled roller 7, outer wall 71, partition 72, baffle 73. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of further restrictions, the elements defined by the phrase "comprising..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the embodiments of the present invention and the various features in the embodiments can be combined with each other, all within the protection scope of the present invention.

[0056] Example 1

[0057] like Figure 1 As shown, the present invention provides a liquid cooling system for a printing device, the liquid cooling system for the printing device comprises a main cooling control unit 1, a normal temperature control unit 2 and a constant temperature control unit 3, the aforementioned three control units respectively control and adjust the temperature of a paper conveying path, a board and a nozzle of the printing device to meet the normal working requirements of the printing device.

[0058] The main cooling control unit 1 includes a main cooling water tank 11, a refrigeration device, a first heat exchange device 14 and a first delivery pipeline 15. The first heat exchange device 14 is located in the main cooling water tank 11. The first heat exchange device 14 is connected to the refrigeration device. The refrigerant cooled by the refrigeration device exchanges heat with the liquid in the main cooling water tank 11 in the first heat exchange device 14 and then flows back to the refrigeration device. The first delivery pipeline 15 is used to transport the liquid in the main cooling water tank 11 to the water-cooled roller 4.

[0059] like Figure 2The refrigeration device includes a condenser 12 and a compressor 13, one end of the first heat exchange device 14 is connected to the condenser 12, and the other end thereof is connected to the other end of the condenser 12 through the compressor 13; in order to control the flow of the refrigerant in the refrigeration device, a switch may be provided on the pipeline connecting the compressor 13 and the condenser 12, for example Figure 1 In addition to the first switch 121, a second switch 122 may be provided on the pipeline connecting the first heat exchange pipeline and the condenser 12, and the on-off of the pipeline of the condenser 12 may be controlled by the above two switches.

[0060] The main cold water tank 11 is used to store liquid for cooling, which can generally be antifreeze. The refrigerant in the first heat exchange device 14 exchanges heat with the liquid stored in the main cold water tank 11, absorbs the heat of the liquid in the main cold water tank 11, and flows to the compressor 13, and flows to the condenser 12 after being pressurized by the compressor 13. After releasing heat in the condenser 12, the refrigerant flows back to the position of the first heat exchange pipeline to exchange heat with the liquid in the main cold water tank 11, and the repetitive cycle achieves the effect of cooling the liquid in the main cold water tank 11. The first heat exchange device 14 can use a coil to increase the heat exchange area. The liquid that has been cooled in the main cold water tank 11 is transported to the position of the water-cooled roller 4 used to transport the printing medium through the first conveying pipeline 15, and the water-cooled roller 4 is cooled. The cooled water-cooled roller 4 can quickly take away the heat on the printing medium, thereby cooling the paper path.

[0061] like Figure 3 As shown, the normal temperature control unit 2 includes a normal temperature water tank 21, a second heat exchange device 22 and a second delivery pipeline 23, at least a portion of the second heat exchange device 22 is located in the normal temperature water tank 21, the inlet of the second heat exchange device 22 is connected to the main cold water tank 11, the outlet of the second heat exchange device 22 is connected to the main cold water tank 11, and the second delivery pipeline 23 is used to transport the liquid in the normal temperature water tank 21 to the board heat sink 5 of the printing device;

[0062] The normal temperature water tank 21 stores liquid for cooling the board. In specific implementation, the temperature of the liquid in the main cold water tank 11 can be set to be lower than the temperature of the liquid in the normal temperature water tank 21. When the liquid in the main cold water tank 11 flows through the second heat exchange device 22, it exchanges heat with the liquid in the normal temperature water tank 21 to absorb the heat of the liquid in the normal temperature water tank 21 and then flows back to the main cold water tank 11. The heat of the liquid in the normal temperature water tank 21 is taken away and the temperature is reduced. The second heat exchange device 22 can use a coil to increase the heat exchange area and improve the heat exchange efficiency.

[0063] The liquid in the normal temperature water tank 21 is transported to the board heat sink 5 through the second delivery pipeline 23. The liquid absorbs the heat of the board while flowing through the board heat sink 5, quickly cools the board, and then flows back to the inside of the normal temperature water tank 21. This cycle is repeated to achieve the effect of using the liquid stored in the normal temperature water tank 21 to cool the board.

[0064] In this embodiment, the liquid in the main cold water tank 11 is introduced into the second heat exchange device 22 disposed in the normal temperature water tank 21 to cool the liquid in the normal temperature water tank 21, thereby adjusting the temperature of the liquid in the normal temperature water tank 21, and using the liquid in the normal temperature water tank 21 to cool the board, so that the independent adjustment of the board temperature is achieved, so that the board temperature is consistent with the ambient temperature, and there is no need to add an additional compressor 13 and condenser 12, so that while ensuring a good temperature adjustment effect on the printing device, the system structure is simplified and the cost is reduced. In addition, this embodiment can also avoid board condensation by adjusting the temperature of the liquid in the normal temperature water tank 21 to be consistent with the ambient temperature suitable for printing.

[0065] like Figure 4 As shown, the constant temperature control unit 3 includes a constant temperature water tank 31, a third heat exchange device 32 and a third delivery pipeline 33, at least a part of the third heat exchange device 32 is located in the constant temperature water tank 31, the inlet of the third heat exchange device 32 is connected to the main cold water tank 11, the outlet of the third heat exchange device 32 is connected to the main cold water tank 11, and the third delivery pipeline 33 is used to transport the liquid in the constant temperature water tank 31 to the nozzle base plate 6 of the printing device.

[0066] The constant temperature water tank 31 is used to store liquid for cooling the nozzle. When the liquid in the main cold water tank 11 flows through the third heat exchange device 32, it exchanges heat with the liquid in the constant temperature water tank 31 to absorb the heat of the liquid in the third container and then flows back to the main cold water tank 11. The third heat exchange device 32 can use a coil to increase the heat exchange area. The temperature of the liquid in the constant temperature water tank 31 is controlled at a constant temperature suitable for the nozzle to work, so that the nozzle can work stably.

[0067] In this embodiment, the liquid in the main cold water tank 11 is introduced into the third heat exchange device 32 arranged in the constant temperature water tank 31 to cool the liquid in the constant temperature water tank 31, thereby adjusting the temperature of the liquid in the constant temperature water tank 31, and using the liquid in the constant temperature water tank 31 to cool the nozzle. In this way, independent temperature regulation of the nozzle temperature is achieved to keep the nozzle temperature constant, and there is no need to add an additional compressor 13 and condenser 12. Therefore, while ensuring the temperature of the printing effect, the system structure is simplified and the cost is reduced.

[0068] The embodiment uses the main cooling control unit 1, the normal temperature control unit 2 and the constant temperature control unit 3 to adjust the temperature of the paper path, the board and the nozzle of the printing device respectively. The temperature of the liquid in the main cold water tank 11 is adjusted by the refrigeration device, so that the temperature of the main cold water tank 11 is maintained at a set lower temperature and lower than the temperature of the normal temperature water tank 21 and the constant temperature water tank 31. The liquid in the main cold water tank 11 is used to cool the paper path, and the liquid in the main cold water tank 11 is introduced into the second heat exchange device 22 set in the normal temperature water tank 21 to cool the liquid in the normal temperature water tank 21, thereby adjusting the temperature of the liquid in the normal temperature water tank 21, and the liquid in the normal temperature water tank 21 is used to adjust the temperature of the board. The liquid in the main cold water tank 11 is introduced into the third heat exchange device 32 set in the constant temperature water tank 31 to cool the liquid in the constant temperature water tank 31, thereby adjusting the temperature of the liquid in the constant temperature water tank 31, and the liquid in the constant temperature water tank 31 is used to adjust the nozzle temperature. Since the three temperature adjustment units use liquids stored in different water tanks to pass into different cooling parts of the printing device, the temperature of different areas of the printing device can be adjusted independently, thereby meeting the demand for accurate temperature adjustment of various areas of the printing device. In addition, since the invention uses the liquid in the main cold water tank 11 to adjust the temperature of the liquid in the normal temperature water tank 21 and the constant temperature water tank 31, the three temperature adjustment units form an integrated cooling system, so that the entire system only needs one set of refrigeration device to independently adjust the temperature of the paper path, board card and nozzle, so the structure is simple, the control is convenient, and the cost is lower.

[0069] The main cooling control unit 1 also includes a main cooling circulation pump 16, the inlet of the main cooling circulation pump 16 is connected to the interior of the main cooling water tank 11 through the first delivery pipeline 15, the outlet of the main cooling circulation pump 16 is connected to the liquid inlet of the water-cooled roller 4 through the first delivery pipeline 15, and the liquid outlet of the water-cooled roller 4 is connected to the interior of the main cooling water tank 11 through the first delivery pipeline 15. The liquid cooling system controls the flow of the main cooling circulation pump 16 according to the temperature of the water-cooled roller 4, and adjusts the temperature of the water-cooled roller 4 by controlling the flow of the main cooling circulation pump 16.

[0070] The main cooling circulation pump 16 pumps the liquid in the main cooling water tank 11 to the water-cooling roller 4. The liquid absorbs the heat of the printing medium transported on the water-cooling roller 4 during the process of flowing through the water-cooling roller 4. The liquid that has absorbed the heat of the printing medium flows back to the main cooling water tank 11 from the liquid outlet of the water-cooling roller 4, thereby taking away the heat of the printing medium to cool the printing medium. The flow rate of the liquid flowing through the water-cooling roller 4 is controlled by controlling the flow rate of the main cooling circulation pump 16, thereby adjusting the temperature of the paper path.

[0071] In this embodiment, a first flow switch 19 may be provided in the pipeline where the liquid flows back from the liquid outlet of the water-cooled roller 4 to the inside of the main cold water tank 11 to control the connection and closing between the main cold water tank 11 and the liquid outlet of the water-cooled roller 4 .

[0072] In this embodiment, the main cooling control unit 1 further includes a first temperature sensor 17, which is used to detect the temperature of the liquid in the main cooling water tank 11. The first temperature sensor 17 can be provided as one or more. When there are more than one first temperature sensor 17, at least one first temperature sensor 17 can be provided at the upper part and the lower part of the main cooling water tank 11, respectively.

[0073] In this embodiment, a first liquid level switch 18 may be further provided. The detection head of the first liquid level switch 18 may be provided in the main cold water tank 11. When the liquid level in the main cold water tank 11 exceeds a preset height, a signal is sent to the liquid cooling system to prevent the liquid level from being too high.

[0074] The normal temperature control unit 2 also includes a normal temperature circulation pump 241, the inlet of the normal temperature circulation pump 241 is connected to the interior of the normal temperature water tank 21 through the second delivery pipeline 23, the outlet of the normal temperature circulation pump 241 is connected to the inlet end of the board heat sink 5 through the second delivery pipeline 23, and the outlet end of the board heat sink 5 is connected to the interior of the normal temperature water tank 21 through the second delivery pipeline 23. The liquid cooling system controls the flow of the normal temperature circulation pump 241 according to the temperature of the board.

[0075] The liquid in the normal temperature water tank 21 is pumped to the board heat sink 5 by the normal temperature circulation pump 241. The liquid absorbs the heat of the board in the process of flowing through the board heat sink 5, and then flows back to the inside of the normal temperature water tank 21. This embodiment also adjusts the temperature of the board by adjusting the flow of the normal temperature circulation pump 241, and can quickly and accurately control the temperature of the board within the normal temperature range. In this embodiment, a second flow switch 242 can be set in the pipeline where the liquid flows from the board heat sink 5 back to the normal temperature water tank 21 to control the connection and closing of the normal temperature water tank 21 and the board heat sink 5. Since there may be multiple board heat sinks 5 in the printing device, a set of normal temperature circulation pumps 241, second delivery pipelines 23 and second flow switches 242 can also be set for each board, so as to independently adjust the temperature of each board.

[0076] The normal temperature control unit 2 also includes a first delivery pump 261 and a fourth delivery pipeline 25. The inlet of the second heat exchange device 22 is connected to the main cold water tank 11 through the fourth delivery pipeline 25, and the outlet of the second heat exchange device 22 is connected to the main cold water tank 11 through the fourth delivery pipeline 25. The first delivery pump 261 is arranged on the fourth delivery pipeline 25 and is located between the inlet of the second heat exchange device 22 and the main water cooling tank. The liquid cooling system controls the flow of the first delivery pump 261 according to the ambient temperature, thereby using the liquid in the main cold water tank 11 to adjust the temperature of the liquid in the normal temperature water tank 21.

[0077] In this embodiment, the first delivery pump 261 is used to deliver the liquid in the main cold water tank 11 to the second heat exchange device 22 to exchange heat with the liquid in the normal temperature water tank 21. The temperature of the liquid in the normal temperature water tank 21 is controlled by controlling the flow rate of the first pump, so that the temperature of the liquid in the normal temperature water tank 21 is kept consistent with the ambient temperature. In this embodiment, a fourth flow switch 262 may be provided in the pipeline where the liquid flows back from the second heat exchange device 22 to the main cold water tank 11 to control the connection and closing between the second heat exchange device 22 and the main cold water tank 11.

[0078] In this embodiment, the normal temperature control unit 2 further includes a second temperature sensor 27 and a first heating device 28, wherein the second temperature sensor 27 is used to detect the temperature of the liquid in the normal temperature water tank 21, and the heating portion of the first heating device 28 is located in the normal temperature water tank 21. The second temperature adjustment unit further includes a second liquid level switch 29, which is used to detect the liquid level in the normal temperature water tank 21, and generates a signal when the liquid level in the normal temperature water tank 21 exceeds a preset height to prevent the liquid level from being too high. In this embodiment, the liquid flow in the first heating device 28 and the second heat exchange device 22 can be used to control the water temperature in the normal temperature water tank 21, so that the water temperature in the normal temperature water tank 21 is maintained consistent with the ambient temperature suitable for printing.

[0079] In this embodiment, the constant temperature control unit 3 also includes a constant temperature circulation pump 352, the inlet of the constant temperature circulation pump 352 is connected to the interior of the constant temperature water tank 31 through the third delivery pipeline 33, the outlet of the constant temperature circulation pump 352 is connected to the inlet end of the nozzle base plate 6 through the third delivery pipeline 33, and the outlet end of the nozzle base plate 6 is connected to the interior of the constant temperature water tank 31 through the third delivery pipeline 33. The liquid cooling system controls the flow of the constant temperature circulation pump 352 according to the temperature of the nozzle.

[0080] The liquid in the constant temperature water tank 31 is pumped to the nozzle bottom plate 6 by the constant temperature circulation pump 352. The liquid absorbs the heat of the nozzle bottom plate 6 while flowing through the nozzle bottom plate 6, and then flows back to the interior of the constant temperature water tank 31. In this embodiment, the temperature of the nozzle can also be adjusted by adjusting the flow rate of the constant temperature circulation pump 352, so that the temperature of the nozzle can be accurately maintained constant to ensure the stability of the nozzle operation.

[0081] In this embodiment, a third flow switch 351 may be provided in the pipeline where the liquid flows from the nozzle base plate 6 back to the constant temperature water tank 31 to control the connection and closing of the constant temperature water tank 31 and the nozzle base plate 6. Since the printing device may have multiple nozzle base plates 6, a set of constant temperature circulation pumps 352, third delivery pipelines 33 and third flow switches 351 may be provided for each nozzle base plate 6, thereby realizing independent adjustment and control of the temperature of each nozzle.

[0082] The constant temperature control unit 3 also includes a second delivery pump 392 and a fifth delivery pipeline 34. The inlet of the third heat exchange device 32 is connected to the main cold water tank 11 through the fifth delivery pipeline 34, and the outlet of the third heat exchange device 32 is connected to the main cold water tank 11 through the fifth delivery pipeline 34. The second delivery pump 392 is arranged on the fifth delivery pipeline 34 and is located between the inlet of the third heat exchange device 32 and the main water cooling tank. The liquid cooling system controls the flow of the second delivery pump 392 according to the nozzle temperature.

[0083] The second delivery pump 392 can be used to deliver the liquid in the main cold water tank 11 to the third heat exchange device 32 for heat exchange with the liquid in the constant temperature water tank 31. By controlling the flow rate of the second delivery pump 392, the temperature of the liquid in the constant temperature water tank 31 can be accurately and conveniently adjusted.

[0084] The third temperature adjustment unit further includes a third temperature sensor 36 and a second heating device 37. The third temperature sensor 36 is used to detect the temperature of the liquid in the thermostatic water tank 31. The heating portion of the second heating device 37 is located in the thermostatic water tank 31. The third temperature adjustment unit further includes a third liquid level switch 38. The third liquid level switch 38 is used to detect the liquid level in the thermostatic water tank 31. When the liquid level in the thermostatic water tank 31 exceeds a preset height, a signal is generated to prevent the liquid level from being too high. The temperature of the liquid in the thermostatic water tank 31 can be adjusted more quickly and accurately through the third heat exchange pipeline and the second heating device 37, and maintained constant.

[0085] In this embodiment, a fifth flow switch 391 may be provided in the pipeline where the liquid flows back from the third heat exchange device 32 to the main cold water tank 11 to control the connection and closing between the third heat exchange device 32 and the main cold water tank 11 .

[0086] In this embodiment, a temperature and humidity sensor can also be set to detect the temperature and humidity of the environment in which the printing device is located. The constant temperature water tank 21 can automatically modulate the temperature of the liquid in the liquid container that provides temperature regulation for the board based on the data; the printing system can automatically adjust the printing status of the device based on this data.

[0087] like Fig.10 and Fig.11 As shown, a cylindrical partition 72 is provided in the water-cooling roller 7, and a hollow cavity structure is formed between the partition 72 and the outer wall 71 of the water-cooling roller 7. The liquid in the main water-cooling box flows in the space between the partition 72 and the outer wall 71 of the water-cooling roller 7. With the above structure, the liquid in the water-cooling roller 7 can flow at a position close to the surface of the water-cooling roller 7, thereby improving the heat exchange efficiency of the liquid.

[0088] like Fig.11 and Fig.12As shown, in addition, a plurality of baffles 73 may be arranged in the cavity structure along the axial direction of the water-cooling roller 7, one end of the baffle 73 is connected to the partition 72, and the other end is suspended. The two ends of the water-cooling roller 7 along the axial direction are respectively a first end and a second end. Among the plurality of baffles 73, one end of each of two adjacent baffles 73 is connected to the first end of the water-cooling roller 7, and the other end is at a preset distance from the second end of the water-cooling roller 7, and the other end is connected to the second end of the water-cooling roller 7, and the other end is at a preset distance from the first end of the water-cooling roller 7.

[0089] After adopting the above structure, the liquid flows along the flow channel surrounded by two adjacent baffles 73 and flows back and forth in the axial direction. On the one hand, the liquid can flow to various areas in the cavity as much as possible, and on the other hand, the temperature of each position in the axial direction of the liquid-cooling roller can be uniform, so that the temperature of each position of the printing medium can also be kept uniform, avoiding the situation where the printing medium is wrinkled due to uneven temperature. Since one end of the baffle 73 is connected to the partition 72 and the other end is suspended, there is a certain interval between the baffle 73 and the outer wall 71 of the water-cooling roller 7, which is conducive to the liquid cooling to flow along the outer wall 71 of the water-cooling roller 7, thereby providing a heat dissipation effect.

[0090] Example 2

[0091] like Figure 5 As shown, this embodiment provides a method for adjusting the temperature of a printing device, which uses the liquid cooling system of the printing device described in Example 1 to adjust the temperature of different areas of the printing device, and the method includes:

[0092] S1: Get the current printing speed of the printing device;

[0093] S2: adjusting the flow rate of the first delivery pipeline 15 according to the printing speed of the printing device;

[0094] The faster the printing speed, the faster the flow rate in the first conveying pipeline 15, and the more heat the paper path takes away by the liquid in the first conveying pipeline 15. The flow rate in the first conveying pipeline 15 can be adapted to the printing speed by the above method, so that the paper path can be timely, accurately and effectively cooled at different printing speeds or at varying printing speeds.

[0095] The step S2: adjusting the flow rate of the first delivery pipeline 15 according to the printing speed of the printing device also includes:

[0096] S21: Obtaining a corresponding relationship curve between the printing speed and the flow rate of the first conveying pipeline 15;

[0097] The corresponding relationship curve can be obtained through experimental calibration.

[0098] S22: determining a target flow rate of the first delivery pipeline 15 according to the current printing speed of the printing device and the corresponding relationship curve;

[0099] The faster the current printing speed is, the higher the target flow rate of the first delivery pipeline 15 is. The target flow rate of the first delivery pipeline 15 is the flow rate corresponding to the current printing speed on the corresponding relationship curve.

[0100] S23: adjusting the current flow rate of the first delivery pipeline 15 to the target flow rate.

[0101] In specific implementation, the flow rate of the main cooling circulation pump 16 can be adjusted to the target flow rate, thereby adjusting the flow rate of the first delivery pipeline 15 to the target flow rate.

[0102] In this embodiment, the temperature of the board can be adjusted in the following manner:

[0103] S3: Get the current ambient temperature;

[0104] In specific implementation, the current ambient temperature can be checked by a temperature and humidity sensor in the surrounding environment.

[0105] S4: Get the actual temperature of the board of the printing device;

[0106] During specific implementation, the host computer of the printing device sends the actual temperature of the board in real time.

[0107] S5: adjusting the flow rate of the second delivery pipeline 23 according to the current ambient temperature and the actual temperature of the board;

[0108] This embodiment controls the speed at which the liquid takes away the heat of the board by controlling the flow rate in the second delivery pipeline 23, thereby adjusting the temperature of the board. This method is not only convenient and accurate, but also can achieve independent adjustment of the temperature of the board.

[0109] The step S5: adjusting the flow of the second delivery pipeline 23 according to the current ambient temperature and the actual temperature of the board also includes:

[0110] S51: Obtaining a corresponding relationship curve between the board temperature and the flow rate of the second delivery pipeline 23;

[0111] The corresponding relationship curve can be obtained through experimental calibration.

[0112] S52: Determine the target flow rate of the second delivery pipeline 23 according to the actual temperature of the board and the corresponding relationship curve;

[0113] The higher the board temperature is, the greater the target flow rate of the second delivery pipeline 23 is.

[0114] S53: adjusting the current flow rate of the second delivery pipeline 23 to the target flow rate.

[0115] In a specific implementation, the flow rate of the second delivery pipeline 23 can be adjusted to the target flow rate by adjusting the flow rate of the normal temperature circulation pump 241 to the target flow rate.

[0116] In this embodiment, room temperature water is used to cool the board. By increasing the water flow rate to quickly take away more heat, not only a good heat dissipation effect can be achieved, but also condensation of the board can be effectively prevented.

[0117] S6: Obtaining the preset temperature of the nozzle of the printing device when it is working;

[0118] The preset temperature is the temperature at which the nozzle meets the stable working requirements.

[0119] S7: Obtaining the actual temperature of the nozzle of the printing device when it is working;

[0120] S8: adjusting the flow rate of the third delivery pipeline 33 according to the preset temperature of the nozzle of the printing device and the actual temperature of the nozzle of the printing device when the nozzle is working, specifically including the following steps:

[0121] S81: Obtaining the actual temperature difference between the actual temperature of the nozzle when it is working and the preset temperature;

[0122] S82: Obtaining a corresponding relationship curve between the temperature difference and the flow rate of the third delivery pipeline 33;

[0123] S83: determining a target flow rate of the third delivery pipeline 33 according to the actual temperature difference and a corresponding relationship curve between the temperature difference and the flow rate of the third delivery pipeline 33 .

[0124] In specific implementation, the flow rate of the constant temperature circulation pump 352 can be adjusted to the target flow rate, thereby adjusting the flow rate of the third delivery pipeline 33 to the target flow rate.

[0125] After printing starts, the temperature of the nozzle can be sent to the liquid cooling system in real time. The liquid cooling system starts the constant temperature circulation pump 352 according to the nozzle temperature and the set temperature, and delivers constant temperature liquid to cool the nozzle to keep the nozzle temperature constant. The constant temperature unit checks the set temperature and the nozzle temperature, and adjusts the flow rate of the circulation pump according to the nozzle temperature.

[0126] The aforementioned control method can ensure that the temperature of the nozzle is always stably maintained at a state suitable for inkjet printing, thereby avoiding a reduction in the working performance of the PZT (piezoelectric ceramic driver), and maintaining the viscosity of the ink in the nozzle at a normal state, so that the nozzle jetting remains stable, thereby ensuring good printing effects.

[0127] like Figure 6 As shown, in this embodiment, the method further includes:

[0128] S91: Obtaining the expected end time of the printing task;

[0129] S92: Determine the stop time of the liquid circulation in the water-cooling roller 4 according to the expected end time of the printing task;

[0130] The stop time of the liquid circulation in the water-cooling roller 4 is set before the expected end time.

[0131] S93: during the printing task, when the liquid circulation stop time is reached, the liquid circulation in the water-cooling roller 4 is stopped, and the printing task is continued;

[0132] This step closes the circulation at the stop time of the liquid circulation before the end of the printing task. At this time, on the one hand, the residual cooling liquid in the water-cooled roller 4 continues to absorb the temperature of the printing medium, thereby increasing the temperature of the water-cooled roller 4 itself. On the other hand, the system continues to perform the remaining printing tasks. At the end of printing, the temperature is just restored to room temperature, which can effectively avoid the situation of paper breaking due to condensation.

[0133] S94: After receiving the print task end signal, the flow rate of the circulating liquid at the board heat sink 5 and the nozzle base plate 6 is reduced to a flow rate that meets the standby state.

[0134] After printing is completed, the heat generated by the board and the nozzle decreases sharply. At this time, after the liquid cooling system receives the signal that the printing task is completed, the circulating water pump of the board and the nozzle begins to reduce the flow until the temperature of the board and the nozzle returns to the set temperature of the water tank.

[0135] In a double-sided printing device, in addition to simultaneous double-sided printing, there is also a single-sided printing working scenario. Therefore, when printing on one side, the one currently printing works according to normal logic, and the other one that is not printing works according to the set minimum flow rate to ensure its standby working temperature.

[0136] like Figure 7 As shown, in this embodiment, the method further includes:

[0137] S951: Obtaining a flow threshold of the second delivery pipeline 23;

[0138] The flow rate threshold of the second delivery pipeline 23 is the maximum flow rate that the second delivery pipeline 23 can provide.

[0139] S952: Obtaining the actual flow rate of the second delivery pipeline 23;

[0140] S953: Determine whether the actual flow rate of the second delivery pipeline 23 is greater than or equal to the flow rate threshold of the second delivery pipeline 23;

[0141] If yes, then reduce the printing speed of the printing device according to the actual temperature of the board.

[0142] If the actual flow of the second delivery pipeline 23 is greater than or equal to the flow threshold of the second delivery pipeline 23, it indicates that the temperature of the board cannot be controlled by simply adjusting the flow. At this time, the printing speed needs to be reduced to control the actual temperature of the board. The higher the actual temperature of the board, the lower the printing speed.

[0143] When printing, the host computer sends the board temperature to the liquid cooling system in real time. The liquid cooling system adjusts the flow rate in real time according to the board temperature. When the flow rate is adjusted to the maximum, the board temperature is still rising, and the water cooling machine will give an alarm, which will notify the printing system. At this time, the printing system will reduce the printing speed as a measure to protect the board and remind manual inspection to prevent the pump life from decreasing and the water flow from reaching the designed standard value. At the same time, when printing, if the cooling water pump is damaged and the water flow detector detects that there is no water flow, the liquid cooling system sends a signal to stop printing. To protect the board, the host computer will reduce the printing speed to the minimum and notify manual inspection. If there is no intervention for a long time, the system will stop printing and return the spray car to the moisturizing position.

[0144] like Figure 8 As shown, in this embodiment, the method further includes:

[0145] S961: Obtaining a flow threshold of the third delivery pipeline 33;

[0146] The flow threshold of the third delivery pipeline 33 is the maximum flow that the third delivery pipeline 33 can provide.

[0147] S962: Obtaining the actual flow rate of the third delivery pipeline 33;

[0148] S963: Determine whether the actual flow rate of the third delivery pipeline 33 is greater than or equal to the flow rate threshold of the third delivery pipeline 33;

[0149] S964: If yes, adjust the temperature of the liquid in the constant temperature water tank 31 within a preset temperature range according to the actual temperature of the nozzle.

[0150] In the process of stabilizing the temperature of the nozzle by adjusting the flow of the third delivery pipeline 33, the liquid temperature of the thermostatic water tank 31 is first kept constant, so that the temperature of the nozzle can be accurately controlled by the flow. However, if the actual flow of the third delivery pipeline 33 is greater than or equal to the flow threshold of the third delivery pipeline 33, it means that the demand for cooling the nozzle cannot be met by adjusting the flow of the liquid alone. At this time, the temperature in the thermostatic water tank 31 can be adjusted, for example, the temperature in the thermostatic water tank 31 can be lowered. The higher the actual temperature of the nozzle, the lower the temperature in the thermostatic water tank 31. The set temperature of the thermostatic water tank 31 is the initial temperature. During the printing process, the flow rate is first adjusted to stabilize the nozzle temperature. When the flow rate cannot completely control the nozzle temperature, the temperature in the thermostatic water tank 31 is appropriately adjusted according to the change in the nozzle temperature.

[0151] In this embodiment, the method further includes:

[0152] S01: Get ambient temperature and humidity;

[0153] S02: Determine whether the ambient temperature and humidity meet the printing requirements;

[0154] In specific implementation, the detected temperature and humidity can be reported to the printing system in real time, and the printing system determines whether the environment meets the required conditions for normal printing based on the data.

[0155] S03: If yes, a signal for allowing printing to start is sent; if no, a prompt message is sent to prompt the user to adjust the temperature and / or humidity of the working environment;

[0156] If the ambient temperature is normal, printing is allowed; if it is abnormal, the user is reminded to adjust the working environment as soon as possible.

[0157] S041: Start the normal temperature control unit 2;

[0158] S042: adjusting the temperature of the liquid in the normal temperature water tank 21 according to the ambient temperature, so that the temperature of the liquid in the normal temperature water tank 21 is consistent with the ambient temperature;

[0159] When the temperature of the normal temperature water tank 21 does not reach the detected ambient temperature, the normal temperature circulation pump 241 is not started to cool the board, and the printing device cannot power on the board.

[0160] S043: When the temperature of the normal temperature control unit 2 is consistent with the ambient temperature, a first notification signal is sent to the upper computer;

[0161] The first notification signal is used to notify the printing system that the temperature of the normal temperature control unit 2 has met the requirements for starting printing.

[0162] S051: the main cooling control unit 1 controls the refrigeration device to cool the liquid in the water tank of the main cooling control unit 1 according to the set temperature of the main cooling control unit 1;

[0163] The set temperature of the main cooling control unit 1 is the temperature that the liquid in the main cooling water tank 11 needs to maintain, and the temperature is set according to the printing requirements.

[0164] S052: When the liquid in the water tank in the main cooling control unit 1 reaches the set temperature, a second notification signal is sent to the upper computer;

[0165] The main water cooling control unit turns on the compressor 13 to cool the main water tank according to the set temperature. After reaching the cooling temperature, it notifies the host computer of the ready signal, that is, sends the aforementioned second notification signal.

[0166] S061: The constant temperature unit adjusts the temperature of the liquid in the constant temperature water tank 31 according to the set constant temperature, so that the temperature of the liquid in the constant temperature water tank 31 is consistent with the set constant temperature;

[0167] S062: When the temperature of the liquid in the constant temperature water tank 31 is consistent with the set constant temperature, a third notification signal is sent to the upper computer;

[0168] When the device is started, the constant temperature water tank 31 automatically starts water temperature modulation according to the set temperature. When the set temperature is reached, the host computer is notified of a ready signal, that is, the aforementioned third control signal is sent.

[0169] S07: After receiving the printing start permission signal, the first notification signal, the second notification signal and the third notification signal, the board is powered on and a notification signal indicating that the printing device is in a printable state is sent.

[0170] When the board is powered on successfully, the host computer sends the temperature of the board to the liquid cooling system. The liquid cooling system determines whether to start the circulation pump based on the board temperature. The higher the board temperature, the greater the circulating water flow rate.

[0171] When printing, the printing system first checks the ambient temperature and humidity, and starts printing when the conditions are met. The ambient temperature and humidity are detected in real time during the printing process. Once the production environment fluctuates, the printing system will slow down or stop printing according to the pre-set program, and actively remind the user to check the environment.

[0172] Example 3

[0173] like Fig. 9As shown, this embodiment also provides a printing device, the printing device includes the printing device liquid cooling system, the printing device liquid cooling system includes the main cooling control unit 1, the normal temperature control unit 2, and the constant temperature control unit 3, and also includes a liquid cooling control system, the liquid cooling control system uniformly controls the main cooling control unit 1, the normal temperature control unit 2, and the constant temperature control unit 3, and can also communicate with other systems of the printing device. The printing device also includes a printing system, a paper path operation control system, and a printing mechanism control system. The printing mechanism control needs to communicate with the liquid cooling system, and the printing system communicates with the printing mechanism control system and the paper path operation control system respectively.

[0174] Since the printing device in this embodiment adopts the printing device liquid cooling system in Embodiment 1, independent temperature regulation can be provided for different areas of the printing device, so that the temperatures of different areas of the printing device meet the working requirements.

[0175] The above is a detailed introduction to the printing device liquid cooling system and the printing device temperature adjustment method provided by the embodiments of the present invention.

[0176] It should be clear that the present invention is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present invention.

[0177] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0178] It should also be noted that the exemplary embodiments mentioned in the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

[0179] The above is only a specific implementation of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the system, module and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

Claims

1. Printing equipment integrated liquid cooling system, characterized in that: include: A main cooling control unit comprises a main cooling water tank, a refrigeration device, a first heat exchange device and a first delivery pipeline, wherein the first heat exchange device is located in the main cooling water tank, the first heat exchange device is connected to the refrigeration device, the refrigerant cooled by the refrigeration device exchanges heat with the liquid in the main cooling water tank in the first heat exchange device and then flows back to the refrigeration device, and the first delivery pipeline is used to deliver the liquid in the main cooling water tank to the water-cooled roller; A normal temperature control unit, comprising a normal temperature water tank, a second heat exchange device and a second delivery pipeline, wherein at least a portion of the second heat exchange device is located in the normal temperature water tank, an inlet of the second heat exchange device is connected to a main cold water tank, an outlet of the second heat exchange device is connected to a main cold water tank body, and the second delivery pipeline is used to deliver liquid in the normal temperature water tank to a heat sink of a board of a printing device; A constant temperature control unit, comprising a constant temperature water tank, a third heat exchange device and a third delivery pipeline, wherein at least a portion of the third heat exchange device is located in the constant temperature water tank, an inlet of the third heat exchange device is connected to a main cold water tank, an outlet of the third heat exchange device is connected to the main cold water tank, and the third delivery pipeline is used to deliver the liquid in the constant temperature water tank to the nozzle bottom plate of the printing device; The refrigeration device comprises a condenser and a compressor. One end of the first heat exchange device is connected to the condenser, and the other end opposite thereto is connected to the other end of the condenser through the compressor.

2. The integrated liquid cooling system for printing equipment according to claim 1, characterized in that: A first switch is arranged on the pipeline connecting the compressor and the condenser.

3. The integrated liquid cooling system for printing equipment according to claim 1, characterized in that: The first heat exchange device is a coil.

4. The integrated liquid cooling system for printing equipment according to claim 1, characterized in that: The main cooling control unit also includes a main cooling circulation pump, the inlet of the main cooling circulation pump is connected to the interior of the main cooling water tank through a first delivery pipeline, the outlet of the main cooling circulation pump is connected to the liquid inlet of the water-cooling roller through the first delivery pipeline, the liquid outlet of the water-cooling roller is connected to the interior of the main cooling water tank through the first delivery pipeline, the liquid cooling system controls the flow of the main cooling circulation pump according to the temperature of the water-cooling roller, and the main cooling control unit also includes a first temperature sensor, which is used to detect the temperature of the liquid in the main cooling water tank.

5. The integrated liquid cooling system for printing equipment according to claim 4, characterized in that: There are multiple first temperature sensors, and at least one first temperature sensor is respectively arranged at the upper part and the lower part of the main cold water tank.

6. The integrated liquid cooling system for printing equipment according to claim 1, characterized in that: The normal temperature control unit also includes a second temperature sensor and a first heating device, wherein the second temperature sensor is used to detect the temperature of the liquid in the normal temperature water tank, and the heating portion of the first heating device is located in the normal temperature water tank.

7. A method for adjusting the temperature of a printing device, characterized in that: The temperature of different areas of a printing device is adjusted using the integrated liquid cooling system for a printing device according to any one of claims 1 to 6, the method comprising: S1: Get the current printing speed of the printing device; S2: adjusting the flow rate of the first delivery pipeline according to the printing speed of the printing device; S3: Get the current ambient temperature; S4: Get the actual temperature of the board of the printing device; S5: adjusting the flow rate of the second delivery pipeline according to the current ambient temperature and the actual temperature of the board; S6: Obtaining the preset temperature of the nozzle of the printing device when it is working; S7: Obtaining the actual temperature of the nozzle of the printing device when it is working; S8: adjusting the flow rate of the third delivery pipeline according to the preset temperature of the nozzle of the printing device when it is working and the actual temperature of the nozzle of the printing device when it is working.

8. The method for adjusting the temperature of a printing device according to claim 7, characterized in that: The step S2: adjusting the flow rate of the first delivery pipeline according to the printing speed of the printing device further comprises: S21: Obtaining a corresponding relationship curve between the printing speed and the flow rate of the first conveying pipeline; S22: determining a target flow rate of the first delivery pipeline according to the current printing speed of the printing device and the corresponding relationship curve; S23: Adjusting the current flow rate of the first delivery pipeline to the target flow rate.

9. The method for adjusting the temperature of a printing device according to claim 7, characterized in that: The step S5: adjusting the flow of the second delivery pipeline according to the current ambient temperature and the actual temperature of the board also includes: S51: Obtaining a corresponding relationship curve between the board temperature and the flow rate of the second delivery pipeline; S52: Determine the target flow rate of the second delivery pipeline 23 according to the actual temperature of the board and the corresponding relationship curve; S53: Adjust the current flow rate of the second delivery pipeline to the target flow rate.

10. A printing device, characterized in that: An integrated liquid cooling system for a printing device comprising any one of claims 1 to 6, wherein the liquid cooling control system uniformly controls a main cooling control unit, a normal temperature control unit and a constant temperature control unit, and the printing device further comprises a printing system, a paper path operation control system and a printing mechanism control system, and the printing system communicates with the printing mechanism control system and the paper path operation control system respectively.

Images