Printing device integrated liquid cooling system, printing device and temperature adjusting method thereof

Abstract

The present application relates to inkjet printing technology field, especially to a kind of printing equipment integration liquid cooling system, printing equipment and temperature regulating method thereof.The printing equipment integration liquid cooling system includes: main cold control unit, including main cold water tank, refrigeration device, first heat exchange device and first conveying pipeline, and the first conveying pipeline is used to transport liquid in main cold water tank to water-cooled roller;Normal temperature control unit, including normal temperature water tank, second heat exchange device and second conveying pipeline, and second conveying pipeline is used to transport liquid in normal temperature water tank to the board card heat sink of printing equipment;Constant temperature control unit, including constant temperature water tank, third heat exchange device and third conveying pipeline, and at least a part of the third heat exchange device is located in the constant temperature water tank, and third conveying pipeline is used to transport liquid in constant temperature water tank to the nozzle bottom plate of printing equipment.The present application can independently adjust the temperature of different regions of printing equipment.

Description

[0001] The present application is a divisional application of the invention patent application with the application number 202411243653.2, filed on September 5, 2024, and the title of “Printing device liquid cooling system and printing device temperature regulation method”. TECHNICAL FIELD

[0002] The present application relates to the field of inkjet printing technology, in particular to a printing device integrated liquid cooling system, a printing device and a temperature regulation method thereof. BACKGROUND

[0003] With the increasing speed of inkjet printing devices, the corresponding data processing amount and the workload of the printhead will also increase, especially in double-sided printing devices, after printing on one side, drying is needed before printing on the other side. In summary, the faster the inkjet printing device, the higher the productivity, which brings an increase in various power consumption and heat. If the increased heat is not removed in time, it will bring various unstable factors to the inkjet printing device, thereby affecting the quality of inkjet printing.

[0004] The printing device often has multiple working devices, which have different functions respectively, and these working devices work together to realize the complete function of the printing device. Some of these working devices will generate heat that affects the printing device. For example, the printhead drive board card that controls the inkjet of the printhead, the printhead used for inkjet, and the paper path used for transporting the printing medium will all generate heat.

[0005] The printhead drive board card mainly converts data signals into circuit signals to drive the piezoelectric crystal of the printhead to perform inkjet action. With the increase of printing speed, the conversion frequency of data signals will gradually increase, and therefore the heat generated by the drive circuit will increase sharply, reaching more than 120℃. Conventional drive board cards generally use heat sinks for heat dissipation. The heat dissipation mode of the heat sink has low heat dissipation efficiency and is not suitable for long-term heat dissipation under high load. Therefore, some heat sinks are equipped with fans to assist airflow and accelerate air flow to further remove heat. However, this method is affected by environmental factors, so its heat dissipation capacity is improved compared to automatic heat dissipation of heat sinks, but it can only be used in some low-speed inkjet application scenarios. Secondly, in most application scenarios, the drive board card is installed near the printhead, and the heat dissipated by the above two methods will affect the working environment of the printhead.

[0006] Because the working frequency of the nozzle is close to the limit value when printing at high speed, the high-frequency PZT oscillation will cause the temperature of the nozzle to continuously rise. After the temperature of the nozzle rises, on the one hand, the working property of the 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 the PZT needs to be adjusted. However, the temperature changes quickly, and if the oscillation amplitude cannot be adjusted in time, the ejection will be unstable. Some nozzles use a temperature-viscosity change curve to control the oscillation amplitude in real time. However, due to the insufficient control accuracy, it is difficult to have a good effect.

[0007] When double-sided printing, the printed image and text on one side need to be dried before printing on the second side. Due to the high-speed operation of the paper path, the dried paper strip has not completely dissipated the heat before entering the second side printing. At this time, the temperature of the paper strip will be radiated to the nozzle, which will affect the working temperature of the nozzle again and increase the temperature of the nozzle. This is also a key factor that cannot control the temperature of the nozzle. Usually, the paper path is lengthened to increase the fan to cool the paper path, or a water-cooled roller is added to cool the paper path. However, due to the working state of the paper path, it is not combined with the printing system. When the machine is stopped, due to the low temperature of the water-cooled roller, condensation is easily formed. After the paper strip absorbs water, under the tension, the paper strip is broken.

[0008] At present, although there are cooling facilities for cooling and dissipating heat for a single working device, during the working process of the printing equipment, multiple working devices need to be cooled and dissipated, and the cooling and dissipation requirements are different. Therefore, the current cooling measures for the printing equipment cannot effectively cool and dissipate the multiple working devices of the printing equipment in a relatively simple way. SUMMARY

[0009] Therefore, the present application provides a printing equipment integrated liquid cooling system, a printing equipment and a temperature adjusting method thereof, which solve the technical problem that the existing printing equipment cannot independently adjust the temperature of different regions of the printing equipment.

[0010] The technical scheme adopted by the present application is as follows:

[0011] In a first aspect, the present application provides a printing equipment integrated liquid cooling system, comprising:

[0012] A main cooling control unit, comprising a main cooling water tank, a refrigeration device, a first heat exchange device and a first conveying pipeline, the first heat exchange device is located in the main cooling water tank, the first heat exchange device is connected with 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 conveying pipeline is used to convey the liquid in the main cooling water tank to the water-cooled roller;

[0013] The normal temperature control unit comprises a normal temperature water tank, a second heat exchange device and a second conveying pipeline. At least a part of the second heat exchange device is located in the normal temperature water tank. The inlet of the second heat exchange device is communicated with the main cold water tank. The outlet of the second heat exchange device is communicated with the main cold water tank. The second conveying pipeline is used for conveying the liquid in the normal temperature water tank to the board card heat dissipation plate of the printing device.

[0014] The constant temperature control unit comprises a constant temperature water tank, a third heat exchange device and a third conveying pipeline. At least a part of the third heat exchange device is located in the constant temperature water tank. The inlet of the third heat exchange device is communicated with the main cold water tank. The outlet of the third heat exchange device is communicated with the main cold water tank. The third conveying pipeline is used for conveying 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 with the condenser. The opposite end is connected with the other end of the condenser through the compressor.

[0016] Preferably, a first switch is arranged on the pipeline communicated with the compressor and the condenser.

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

[0018] Preferably, the main cold control unit further comprises a main cold circulating pump. The inlet of the main cold circulating pump is communicated with the inside of the main cold water tank through the first conveying pipeline. The outlet of the main cold circulating pump is communicated with the liquid inlet of the water-cooled roller through the first conveying pipeline. The liquid outlet of the water-cooled roller is communicated with the inside of the main cold water tank through the first conveying pipeline. The flow of the main cold circulating pump is controlled according to the temperature of the water-cooled roller. The main cold control unit further comprises a first temperature sensor. The first temperature sensor is used for detecting the temperature of the liquid in the main cold water tank.

[0019] Preferably, the first temperature sensor is a plurality of first temperature sensors. At least one first temperature sensor is arranged in 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. The second temperature sensor is used for detecting the temperature of the liquid in the normal temperature water tank. The first heating device is used for heating the part located in the normal temperature water tank.

[0021] In the second aspect, the application further provides a printing device temperature adjusting method. The printing device integrated liquid cooling system is used for adjusting the temperature of different regions of the printing device. The method comprises the following steps.

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

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

[0024] S3: obtaining the current ambient temperature;

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

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

[0027] S6: obtaining the preset temperature of the printing head when working;

[0028] S7: obtaining the actual temperature of the printing head when working;

[0029] S8: adjusting the flow of the third conveying pipeline according to the preset temperature of the printing head when working and the actual temperature of the printing head when working.

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

[0031] S21: obtaining the corresponding relationship curve of the printing speed and the flow of the first conveying pipeline;

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

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

[0034] Preferably, the S5: adjusting the flow of the second conveying pipeline according to the current ambient temperature and the actual temperature of the board card further comprises:

[0035] S51: obtaining the corresponding relationship curve of the board card temperature and the flow of the second conveying pipeline;

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

[0037] S53: adjusting the current flow of the second conveying pipeline to the target flow.

[0038] In a third aspect, the present application also provides a printing device comprising the printing device integrated liquid cooling system of the first aspect, wherein the liquid cooling control system controls the main cooling control unit, the normal temperature control unit and the constant temperature control unit uniformly, 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.

[0039] Beneficial effects: the printing equipment integrated liquid cooling system, printing equipment and temperature adjusting method thereof utilize the main cooling control unit, normal temperature control unit and constant temperature control unit to respectively adjust the temperature of the paper path, board card and nozzle of the printing equipment. The temperature of the liquid in the main cooling water tank is adjusted by the refrigeration device, so that the temperature of the main cooling water tank is kept at a set lower temperature and is lower than the temperature of the normal temperature water tank and the constant temperature water tank. The liquid in the main cooling water tank is used to cool the paper path, and the liquid in the main cooling 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, so as to adjust 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 card. And the liquid in the main cooling 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, so as to adjust 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 temperature of the nozzle. Since the three temperature adjusting units use the liquid stored in different water tanks to enter different cooling parts of the printing equipment, the temperature of different regions of the printing equipment can be independently adjusted, so as to meet the demand of accurate temperature adjustment of each region of the printing equipment. And since the invention uses the liquid in the main cooling water tank to adjust the temperature of the liquid in the normal temperature water tank and the constant temperature water tank, the three temperature adjusting units form an integrated cooling system, so that the whole system only needs a 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. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. For those skilled in the art, other drawings can also be obtained on the premise of not creating labor, and these are within the protection scope of the present application.

[0041] Figure 1 It is the principle diagram of the printing equipment liquid cooling system of the present application;

[0042] Figure 2 It is the principle diagram of the main cooling control unit in the present application;

[0043] Figure 3 It is the principle diagram of the normal temperature control unit in the present application;

[0044] Figure 4 It is the principle diagram of the constant temperature control unit in the present application;

[0045] Figure 5 It is the flowchart of the temperature adjustment of the printing equipment of the present application;

[0046] Figure 6 It is the flowchart of the method for controlling the temperature of the water-cooled roller according to the printing end time of the present application;

[0047] Figure 7 Flow chart of the method for controlling the temperature of the board card in the case of the largest flow of the present application;

[0048] Figure 8 Flow chart of the method for controlling the temperature of the nozzle in the case of the largest flow of the present application;

[0049] Figure 9 Flow chart of the method for controlling each system of the printing device of the present application;

[0050] Figure 10 Three-dimensional structure diagram of the water-cooled roller of the present application;

[0051] Figure 11 Structure diagram of the internal liquid flow channel of the water-cooled roller of the present application;

[0052] Figure 12 Structure diagram of the liquid cooling flow path in the water-cooled roller of the present application;

[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 circulating 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 circulating pump 241, second flow switch 242, fourth delivery pipeline 25, first delivery pump 261, fourth flow switch 262, 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 circulating 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 card heat sink 5, nozzle bottom plate 6, water-cooled roller 7, outer wall 71, partition 72, baffle 73. DETAILED DESCRIPTION

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, the element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Where there is no conflict, embodiments of the present invention and the various features thereof can be combined with each other, all of which are within the scope of protection 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 includes 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 the paper feed path, circuit board, and printhead of the printing device to meet the normal operating 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 conveying pipeline 15. The first heat exchange device 14 is located in the main cooling water tank 11 and 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 conveying pipeline 15 is used to convey 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 with the condenser 12, and the opposite end is connected with the other end of the condenser 12 through the compressor 13; in order to control the flow of refrigerant in the refrigeration device, a switch, for example, the first switch 121 in the refrigeration device can be arranged on the pipeline connecting the compressor 13 and the condenser 12, and a second switch 122 can also be arranged on the pipeline connecting the first heat exchange pipeline and the condenser 12, and the on-off of the condenser 12 pipeline can be controlled through the above two switches. Figure 1

[0060] The main cold water tank 11 is used to store the liquid for cooling, and the antifreeze liquid can be generally used. 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 then flows to the compressor 13, and is pressurized by the compressor 13 and then flows to the condenser 12. The refrigerant releases heat in the condenser 12 and then flows to the position of the first heat exchange pipeline and exchanges heat with the liquid in the main cold water tank 11, and so on, so as to realize 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 cooled in the main cold water tank 11 is transported to the position of the water-cooled roller 4 for transporting the printing medium through the first conveying pipeline 15, and the water-cooled roller 4 is cooled. The water-cooled roller 4 after cooling can quickly take away the heat on the printing medium, thereby achieving the effect of cooling the paper path.

[0061] As shown in Figure 3 The normal temperature control unit 2 includes a normal temperature water tank 21, a second heat exchange device 22, and a second conveying pipeline 23, at least a part 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 communicated with the main cold water tank 11, the outlet of the second heat exchange device 22 is communicated with the main cold water tank 11, and the second conveying pipeline 23 is used to transport the liquid in the normal temperature water tank 21 to the board card heat dissipation plate 5 of the printing device.

[0062] The normal temperature water tank 21 stores the liquid for dissipating heat of the board card. 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 returns to the main cold water tank 11. After the heat of the liquid in the normal temperature water tank 21 is taken away, 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 ambient temperature water tank 21 is transported to the circuit board heat sink 5 through the second delivery pipe 23. As the liquid flows through the circuit board heat sink 5, it absorbs the heat of the circuit board and quickly cools the circuit board. Then it flows back into the ambient temperature water tank 21. This cycle is repeated to achieve the effect of cooling the circuit board using the liquid stored in the ambient temperature water tank 21.

[0064] In this embodiment, the liquid in the main cold water tank 11 is introduced into the second heat exchange device 22 located in the ambient temperature water tank 21 to cool the liquid in the ambient temperature water tank 21, thereby regulating the temperature of the liquid in the ambient temperature water tank 21. The liquid in the ambient temperature water tank 21 is then used to cool the circuit board. This achieves independent temperature regulation of the circuit board, keeping its temperature consistent with the ambient temperature, without requiring an additional compressor 13 and condenser 12. Therefore, while ensuring good temperature regulation for the printing equipment, the system structure is simplified, and costs are reduced. Furthermore, this embodiment can also prevent circuit board condensation by adjusting the liquid temperature in the ambient temperature water tank 21 to match the suitable ambient temperature 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 portion 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, and the outlet of the third heat exchange device 32 is connected to the main cold water tank 11. The third delivery pipeline 33 is used to deliver the liquid in the constant temperature water tank 31 to the printhead base plate 6 of the printing equipment.

[0066] The constant-temperature water tank 31 stores the liquid used to cool the nozzles. The liquid in the main cold water tank 11 exchanges heat with the liquid in the constant-temperature water tank 31 as it flows through the third heat exchange device 32, absorbing heat from the liquid in the third container, and then flows back to the main cold water tank 11. The third heat exchange device 32 can be 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 nozzle operation, ensuring stable nozzle operation.

[0067] In this embodiment, the liquid in the main cold water tank 11 is introduced into the third heat exchange device 32 installed in the constant temperature water tank 31 to cool the liquid in the constant temperature water tank 31, thereby regulating the temperature of the liquid in the constant temperature water tank 31. The liquid in the constant temperature water tank 31 is then used to cool the printhead. This achieves independent temperature regulation of the printhead, keeping the printhead temperature constant, without the need for additional compressor 13 and condenser 12. Therefore, while ensuring the temperature stability of the printing effect, the system structure is simplified and the cost is reduced.

[0068] The embodiment utilizes the main cooling control unit 1, the normal temperature control unit 2 and the constant temperature control unit 3 to respectively regulate the temperature of the paper path, the board card and the nozzle of the printing device. The temperature of the liquid in the main cooling water tank 11 is regulated by the refrigeration device, so that the temperature of the main cooling water tank 11 is kept at a set lower temperature and is lower than the temperature of the normal temperature water tank 21 and the constant temperature water tank 31. The liquid in the main cooling water tank 11 is used to cool the paper path, and the liquid in the main cooling water tank 11 is introduced into the second heat exchange device 22 arranged in the normal temperature water tank 21 to cool the liquid in the normal temperature water tank 21, so as to regulate 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 regulate the temperature of the board card. The liquid in the main cooling 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, so as to regulate 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 regulate the temperature of the nozzle. Since the three temperature regulating units utilize the liquid stored in the different water tanks to be introduced into different cooling parts of the printing device, the temperature of different regions of the printing device can be independently regulated, so as to meet the requirement of accurately regulating the temperature of each region of the printing device. In addition, the liquid in the main cooling water tank 11 is utilized to regulate the temperature of the liquid in the normal temperature water tank 21 and the constant temperature water tank 31, so that the three temperature regulating units form an integrated cooling system, and thus the whole system only needs one set of refrigeration device to independently regulate the temperature of the paper path, the board card and the nozzle, so that the structure is simple, the control is convenient and the cost is lower.

[0069] The main cooling control unit 1 further comprises a main cooling circulating pump 16, an inlet of the main cooling circulating pump 16 is communicated with the inside of the main cooling water tank 11 through the first conveying pipeline 15, an outlet of the main cooling circulating pump 16 is communicated with the liquid inlet of the water-cooled roller 4 through the first conveying pipeline 15, the liquid outlet of the water-cooled roller 4 is communicated with the inside of the main cooling water tank 11 through the first conveying pipeline 15, and the flow of the main cooling circulating pump 16 is controlled according to the temperature of the water-cooled roller 4 by the liquid cooling system, so as to regulate the temperature of the water-cooled roller 4 by controlling the flow of the main cooling circulating pump 16.

[0070] The main cooling circulating pump 16 pumps the liquid in the main cooling water tank 11 into the water-cooled roller 4, and the liquid absorbs the heat of the printing medium conveyed on the water-cooled roller 4 in the process of flowing through the water-cooled roller 4. The liquid after absorbing the heat of the printing medium flows back to the main cooling water tank 11 from the liquid outlet of the water-cooled roller 4, so as to take away the heat of the printing medium to cool the printing medium. The flow of the liquid flowing through the water-cooled roller 4 is controlled by controlling the flow of the main cooling circulating pump 16, so as to regulate the temperature of the paper path.

[0071] The first flow switch 19 can be arranged in the pipeline in which the liquid flows back to the inside of the main cooling water tank 11 from the liquid outlet of the water-cooled roller 4, so as to control the communication and closing between the main cooling water tank 11 and the liquid outlet of the water-cooled roller 4.

[0072] The main cooling control unit 1 in the embodiment also comprises a first temperature sensor 17 for detecting the temperature of the liquid in the main cooling water tank 11. The first temperature sensor 17 can be one or multiple. When the first temperature sensor 17 is multiple, at least one first temperature sensor 17 can be arranged at the upper part and the lower part of the main cooling water tank 11 respectively.

[0073] The embodiment can also be provided with a first liquid level switch 18. The detection head of the first liquid level switch 18 can be arranged in the main cooling water tank 11. When the liquid level in the main cooling water tank 11 exceeds the preset height, a signal is sent to the liquid cooling system to avoid the liquid level being too high.

[0074] The normal temperature control unit 2 also comprises a normal temperature circulating pump 241. The inlet of the normal temperature circulating pump 241 is in communication with the inside of the normal temperature water tank 21 through the second conveying pipeline 23. The outlet of the normal temperature circulating pump 241 is in communication with the inlet end of the board card heat sink 5 through the second conveying pipeline 23. The outlet end of the board card heat sink 5 is in communication with the inside of the normal temperature water tank 21 through the second conveying pipeline 23. The liquid cooling system controls the flow of the normal temperature circulating pump 241 according to the temperature of the board card.

[0075] The liquid in the normal temperature water tank 21 is pumped to the board card heat sink 5 by the normal temperature circulating pump 241. The liquid absorbs the heat of the board card in the process of flowing through the board card heat sink 5, and then flows back to the inside of the normal temperature water tank 21. The embodiment also adjusts the temperature of the board card by adjusting the flow of the normal temperature circulating pump 241, which can quickly and accurately control the temperature of the board card within the normal temperature range. The embodiment can also set a second flow switch 242 in the pipeline through which the liquid flows from the board card heat sink 5 back to the normal temperature water tank 21 to control the communication and closing of the normal temperature water tank 21 and the board card heat sink 5. Since there can be multiple board card heat sinks 5 in the printing device, a set of normal temperature circulating pump 241, second conveying pipeline 23 and second flow switch 242 can be provided for each board card to independently adjust the temperature of each board card.

[0076] The normal temperature control unit 2 also comprises a first conveying pump 261 and a fourth conveying pipeline 25. The inlet of the second heat exchange device 22 is in communication with the main cooling water tank 11 through the fourth conveying pipeline 25. The outlet of the second heat exchange device 22 is in communication with the main cooling water tank 11 through the fourth conveying pipeline 25. The first conveying pump 261 is arranged on the fourth conveying pipeline 25 and between the inlet of the second heat exchange device 22 and the main cooling water tank. The liquid cooling system controls the flow of the first conveying pump 261 according to the ambient temperature, so as to adjust the temperature of the liquid in the normal temperature water tank 21 by using the liquid in the main cooling water tank 11.

[0077] 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 of the first pump, so that the temperature of the liquid in the normal temperature water tank 21 is consistent with the ambient temperature. The fourth flow switch 262 is arranged in the pipeline through which the liquid flows back from the second heat exchange device 22 to the main cold water tank 11, so as to control the connection and closing between the second heat exchange device 22 and the main cold water tank 11.

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

[0079] In the embodiment, the constant temperature control unit 3 further comprises a constant temperature circulating pump 352. The inlet of the constant temperature circulating pump 352 is connected to the inside of the constant temperature water tank 31 through the third delivery pipeline 33. The outlet of the constant temperature circulating pump 352 is connected to the inlet end of the nozzle bottom plate 6 through the third delivery pipeline 33. The outlet end of the nozzle bottom plate 6 is connected to the inside of the constant temperature water tank 31 through the third delivery pipeline 33. The liquid cooling system controls the flow of the constant temperature circulating 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 circulating pump 352. The liquid absorbs the heat of the nozzle bottom plate 6 during the process of flowing through the nozzle bottom plate 6, and then flows back to the inside of the constant temperature water tank 31. In the embodiment, the temperature of the nozzle can be adjusted by adjusting the flow of the constant temperature circulating pump 352, so that the temperature of the nozzle can be accurately maintained constant, thereby ensuring the stability of the nozzle.

[0081] In the embodiment, the third flow switch 351 is arranged in the pipeline through which the liquid flows back from the nozzle bottom plate 6 to the constant temperature water tank 31, so as to control the connection and closing between the constant temperature water tank 31 and the nozzle bottom plate 6. Since there can be multiple nozzle bottom plates 6 in the printing device, a set of constant temperature circulating pump 352, third delivery pipeline 33 and third flow switch 351 can be arranged for each nozzle bottom plate 6, so as to independently adjust and control the temperature of each nozzle.

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

[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 to exchange heat with the liquid in the constant temperature water tank 31, and the temperature of the liquid in the constant temperature water tank 31 can be accurately and conveniently adjusted by controlling the flow of the second delivery pump 392.

[0084] The third temperature adjusting unit further comprises 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 constant temperature water tank 31, and the second heating device 37 is used to heat part of the constant temperature water tank 31. The third temperature adjusting unit further comprises a third liquid level switch 38, which is used to detect the liquid level of the liquid in the constant temperature water tank 31, and generates a signal when the liquid level in the constant temperature water tank 31 exceeds a preset height, so as to avoid the liquid level being too high. The third heat exchange pipeline and the second heating device 37 can be used to more quickly and accurately adjust the temperature of the liquid in the constant temperature water tank 31 and maintain the temperature constant.

[0085] The fifth flow switch 391 can be arranged in the pipeline through which the liquid flows from the third heat exchange device 32 back to the main cold water tank 11, so as to control the communication and closing between the third heat exchange device 32 and the main cold water tank 11.

[0086] The temperature and humidity sensor can be arranged, the temperature and humidity sensor is used to detect the temperature and humidity of the environment in which the printing equipment is located, the normal temperature water tank 21 can automatically adjust the temperature of the liquid in the liquid container for temperature adjustment of the board card according to the data, and the printing system can automatically adjust the printing state of the equipment according to the data.

[0087] As shown in Figure 10 and Figure 11 The water-cooled roller 7 is provided with a cylindrical partition plate 72, and a hollow cavity structure is formed between the partition plate 72 and the outer wall 71 of the water-cooled roller 7. The liquid in the main water-cooled tank flows in the space between the partition plate 72 and the outer wall 71 of the water-cooled roller 7. After the foregoing structure is adopted, the liquid in the water-cooled roller 7 can flow close to the surface of the water-cooled roller 7, so that the heat exchange efficiency of the liquid is improved.

[0088] As shown in Figure 11 and Figure 12As shown, in addition, a plurality of baffles 73 can be arranged in the cavity structure along the axial direction of the water-cooled roller 7, one end of the baffle 73 is connected with the partition plate 72, and the other end is suspended. The two ends of the water-cooled roller 7 along the axial direction are respectively the first end and the second end, and in the plurality of baffles 73, one end of one of each adjacent two baffles 73 is connected with the first end of the water-cooled roller 7, and the other end is away from the second end of the water-cooled roller 7 by a predetermined distance, and one end of the other is connected with the second end of the water-cooled roller 7, and the other end is away from the first end of the water-cooled roller 7 by a predetermined distance.

[0089] After adopting the foregoing structure, the liquid flows along the flow channel surrounded by the adjacent two baffles 73 and flows back and forth along the axial direction, so that on the one hand the liquid can flow to each area in the cavity as much as possible, and on the other hand the temperature at each position in the axial direction of the liquid-cooled roller is uniform, so that the temperature of the printing medium at each position is also kept uniform, thereby avoiding the wrinkling of the printing medium due to uneven temperature. Since one end of the baffle 73 is connected with the partition plate 72 and the other end is suspended, a certain gap is formed between the baffle 73 and the outer wall 71 of the water-cooled roller 7, which is conducive to the flow of the liquid cooling against the outer wall 71 of the water-cooled roller 7, thereby providing a heat dissipation effect.

[0090] Embodiment 2

[0091] As Figure 5 shown, the embodiment provides a printing device temperature adjusting method, which adjusts the temperature of different areas of the printing device by using the liquid cooling system of the printing device described in embodiment 1, and the method comprises:

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

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

[0094] The faster the printing speed, the faster the flow in the first conveying pipeline 15, and the more heat the liquid in the first conveying pipeline 15 can take away from the paper path. By the foregoing method, the flow in the first conveying pipeline 15 can be adapted to the printing speed, so that the paper path can be cooled in time, accurately and effectively under different printing speeds or changing printing speeds.

[0095] The S2: adjusting the flow of the first conveying pipeline 15 according to the printing speed of the printing device further comprises:

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

[0097] The corresponding relationship curve can be obtained by experiment calibration.

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

[0099] The faster the current printing speed, the higher the target flow rate of the first conveying pipeline 15. The target flow rate of the first conveying 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 conveying pipeline 15 to the target flow rate.

[0101] In specific implementation, the flow rate of the main cold circulation pump 16 can be adjusted to the target flow rate, so as to adjust the flow rate of the first conveying pipeline 15 to the target flow rate.

[0102] In the embodiment, the adjustment of the board card temperature can be implemented in the following manner:

[0103] S3: obtaining a 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: obtaining an actual temperature of a board card of the printing device;

[0106] In specific implementation, the actual temperature of the board card is sent by a host computer of the printing device in real time.

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

[0108] In the embodiment, the speed of the liquid taking away the heat of the board card is controlled by controlling the flow rate of the second conveying pipeline 23, so as to adjust the temperature of the board card. This manner is not only convenient and accurate, but also can realize independent adjustment of the temperature of the board card.

[0109] The S5: adjusting the flow rate of the second conveying pipeline 23 according to the current ambient temperature and the actual temperature of the board card further includes:

[0110] S51: obtaining a corresponding relationship curve of the temperature of the board card and the flow rate of the second conveying pipeline 23;

[0111] The corresponding relationship curve can be obtained by experiment calibration.

[0112] S52: determining a target flow rate of the second conveying pipeline 23 according to the actual temperature of the board card and the corresponding relationship curve;

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

[0114] S53: adjusting the current flow rate of the second conveying 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 circulating pump 241 to the target flow rate.

[0116] In this embodiment, the cooling of the board card is performed by using normal-temperature water, and increasing the water flow rate to quickly remove more heat can not only achieve good heat dissipation effect, but also effectively prevent the condensation of the board card.

[0117] S6: Obtain a preset temperature of the printhead when the printhead works;

[0118] The preset temperature is a temperature at which the printhead meets the stable working requirement.

[0119] S7: Obtain an actual temperature of the printhead when the printhead works;

[0120] S8: Adjust the flow rate of the third delivery pipeline 33 according to the preset temperature of the printhead when the printhead works and the actual temperature of the printhead when the printhead works, and specifically includes the following steps:

[0121] S81: Obtain an actual temperature difference between the actual temperature and the preset temperature when the printhead works;

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

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

[0124] In a specific implementation, the flow rate of the constant-temperature circulating pump 352 can be adjusted to the target flow rate, so as to adjust the flow rate of the third delivery pipeline 33 to the target flow rate.

[0125] After starting printing, the printhead temperature can be sent to the liquid cooling system in real time, the liquid cooling system starts the constant-temperature circulating pump 352 according to the printhead temperature and the set temperature, delivers constant-temperature liquid to cool the printhead, and always keeps the printhead temperature constant. The constant-temperature unit verifies each other according to the set temperature and the printhead temperature, and adjusts the flow rate of the circulating pump according to the printhead temperature.

[0126] Through the foregoing control mode, the printhead temperature can be always stably maintained in a state suitable for inkjet printing, so as to avoid the reduction of the working property of the PZT (piezoelectric ceramic driver), and maintain the viscosity of the ink in the printhead in a normal state, so as to maintain the ejection of the printhead stable, thereby ensuring good printing effect.

[0127] As shown in FIG. Figure 6 The method further includes:

[0128] S91: Obtain an expected end time of the print task;

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

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

[0131] S93: During the execution of the print task, stop the liquid circulation in the water-cooled roller 4 when the stop time of liquid circulation is reached, and continue to execute the print task;

[0132] This step closes the circulation at the stop time of liquid circulation before the end of the print task, at which time the residual refrigeration liquid of the water-cooled roller 4 continues to absorb the temperature of the print medium, thereby increasing the temperature of the water-cooled roller 4 itself, and on the other hand, the system continues to perform the remaining print task, and at the end of printing, the temperature is just restored to room temperature, so that the situation of paper breakage due to condensation can be effectively avoided.

[0133] S94: When a print task end signal is received, reduce the flow of circulating liquid at the board card heat sink 5 and the printhead bottom plate 6 to the flow that meets the standby state.

[0134] After printing, the heat generation of the board card and the printhead decreases sharply, at which time the liquid cooling system receives a print task end signal, and the circulating water pump of the board card and the printhead starts to reduce the flow until the temperature of the board card and the printhead returns to the water tank set temperature.

[0135] In a double-sided printing device, in addition to double-sided simultaneous printing, there is also a single-sided printing work scenario, so when single-sided printing, the printing side works according to the normal logic, and the other side without printing work works according to the set minimum flow to ensure its standby working temperature.

[0136] As shown in FIG. 1, in the embodiment, the method further comprises: Figure 7

[0137] S951: Obtain a flow threshold of the second conveying pipeline 23;

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

[0139] S952: Obtain an actual flow of the second conveying pipeline 23;

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

[0141] S954 If yes, reduce the print speed of the printing device according to the actual temperature of the board card.​

[0142] If the actual flow rate of the second conveying pipeline 23 is greater than or equal to the flow rate threshold of the second conveying pipeline 23, it indicates that the temperature of the board card cannot be controlled only by adjusting the flow rate, and the printing speed needs to be reduced to control the actual temperature of the board card. The higher the actual temperature of the board card, the lower the printing speed.

[0143] During printing, the host computer sends the board card temperature to the liquid cooling system in real time, and the liquid cooling system adjusts the flow rate in real time according to the board card temperature. When the flow rate is adjusted to the maximum, the board card temperature is still rising, and the water cooler will give an alarm. At this time, the printing system will be notified, and as a measure to protect the board card, the printing speed will be reduced, and manual inspection will be reminded to prevent the pump life from being reduced and the water flow from reaching the designed standard value. At the same time, during printing, if the heat dissipation water pump is damaged and the water flow detector detects no water flow, the liquid cooling system will send a signal to stop printing. To protect the board card, the host computer will reduce the printing speed to the minimum and notify manual inspection. If there is no human intervention for a long time, the system will stop printing and the printing carriage will be returned to the moisturizing position.

[0144] As shown in FIG. 8, in the embodiment, the method further includes: Figure 8

[0145] S961: acquiring a flow rate threshold of the third conveying pipeline 33;

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

[0147] S962: acquiring an actual flow rate of the third conveying pipeline 33;

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

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

[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 constant temperature water tank 31 is first kept constant, so as to accurately control the temperature of the nozzle 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 indicates that the demand for cooling the nozzle cannot be met only by adjusting the flow of the liquid, at this time, the temperature of the constant temperature water tank 31 can be adjusted, for example, the temperature of the constant temperature water tank 31 can be lowered, the higher the actual temperature of the nozzle, the lower the temperature of the constant temperature water tank 31. The set temperature of the constant temperature water tank 31 is the initial temperature, during the printing process, the nozzle temperature is first stabilized by adjusting the flow rate, when the flow rate cannot completely control the nozzle temperature, the temperature of the constant temperature water tank 31 is adjusted according to the change of the nozzle temperature.

[0151] In the embodiment, the method further comprises:

[0152] S01: acquiring the temperature and humidity of the environment;

[0153] S02: judging whether the temperature and humidity of the environment 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 judges whether the environment meets the required conditions for normal printing according to the data

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

[0156] If the temperature of the environment is normal, printing is allowed, and if not, the user is reminded to adjust the working environment as soon as possible

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

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

[0159] When the temperature of the normal temperature water tank 21 does not reach the detected temperature of the environment, the normal temperature circulating pump 241 does not start to cool the board card, and the printing device cannot power on the board card.

[0160] S043: when the temperature of the normal temperature control unit 2 is consistent with the temperature of the environment, 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 cold control unit 1 controls the refrigeration device to cool the liquid in the water tank of the main cold control unit 1 according to the set temperature of the main cold 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, which is set according to the requirements of printing.

[0164] S052: Send a second notification signal to the host computer when the liquid in the water tank in the main cooling control unit 1 reaches the set temperature;

[0165] The main water cooling control unit starts the compressor 13 to cool the main water tank according to the set temperature, and sends a ready signal to the host computer after reaching the cooling temperature, that is, sends the second notification signal mentioned above.

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

[0167] S062: Send a third notification signal to the host computer when the temperature of the liquid in the thermostat water tank 31 is consistent with the set thermostat temperature;

[0168] When the device starts, the thermostat water tank 31 automatically starts water temperature regulation according to the set temperature, and sends a ready signal to the host computer after reaching the set temperature, that is, sends the third control signal mentioned above.

[0169] S07: Power on the board card after receiving the start printing signal, the first notification signal, the second notification signal and the third notification signal, and send a notification signal that the printing device is in a printable state.

[0170] When the board card is powered on successfully, the host computer sends the temperature of the board card to the liquid cooling system, and the liquid cooling system judges whether the board card temperature starts the circulating pump. The higher the board card temperature, the greater the circulating water flow.

[0171] During printing, the printing system first checks the environmental temperature and humidity, and starts printing when the conditions are met. During the printing process, the environmental temperature and humidity are detected in real time. Once the production environment fluctuates, the printing system reduces the speed or stops printing according to the pre-set program, and actively reminds the user to check the environment.

[0172] Example 3

[0173] As Figure 9As shown, the embodiment also provides a printing device, which comprises the printing device liquid cooling system, in addition to the aforementioned main cooling control unit 1, normal temperature control unit 2, constant temperature control unit 3, the printing device liquid cooling system also comprises a liquid cooling control system, which controls the main cooling control unit 1, normal temperature control unit 2, constant temperature control unit 3, and can also communicate with other systems of the printing device. The printing device also comprises 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 the embodiment adopts the printing device liquid cooling system in embodiment 1, independent temperature adjustment can be provided for different regions of the printing device, so that the temperatures of different regions of the printing device can all 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 embodiment.

[0176] It should be noted that the present application is not limited to the specific configurations and processes described above and shown in the drawings. For the sake of brevity, detailed descriptions of well-known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application 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 steps, after understanding the spirit of the present application.

[0177] The functional blocks shown in the structure block diagram described above 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 functional card, etc. When implemented in software, the elements of the present application are program or code segments used to perform the required tasks. The program or code segments can be stored in a machine-readable medium or transmitted through a data signal carried in a carrier wave over a transmission medium or communication link. The "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 segments 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 application describe some methods or systems based on a series of steps or devices. However, the present application 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 different from the order in the embodiments, or several steps are performed simultaneously.

[0179] The above merely illustrates the specific implementation of the present application. The skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, module and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described herein. It should be understood that the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered within the protection scope of the present application.

Claims

1. An integrated liquid cooling system for printing equipment, characterized in that, include: The main cooling control unit includes a main cooling water tank, a refrigeration unit, a first heat exchange unit, and a first delivery pipeline. The first heat exchange unit is located in the main cooling water tank and is connected to the refrigeration unit. The refrigerant cooled by the refrigeration unit exchanges heat with the liquid in the main cooling water tank in the first heat exchange unit and then flows back to the refrigeration unit. The first delivery pipeline is used to deliver the liquid in the main cooling water tank to the water-cooled roller. The ambient temperature control unit includes an ambient temperature water tank, a second heat exchange device, and a second delivery pipeline. At least a portion of the second heat exchange device is located in the ambient temperature water tank. The inlet of the second heat exchange device is connected to the main cold water tank, and the outlet of the second heat exchange device is connected to the main cold water tank. The second delivery pipeline is used to deliver the liquid in the ambient temperature water tank to the heat sink of the printing equipment. The constant temperature control unit includes a constant temperature water tank, a third heat exchange device and a third delivery pipeline. At least a portion of the third heat exchange device is located in the constant temperature water tank. The inlet of the third heat exchange device is connected to the main cold water tank, and the outlet of the third heat exchange device is connected to the main cold water tank. The third delivery pipeline is used to deliver the liquid in the constant temperature water tank to the printhead base plate of the printing equipment. The refrigeration device includes a condenser and a compressor. One end of the first heat exchange device is connected to the condenser, and the other end 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 provided 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-cooled roller through a first delivery pipeline. The liquid outlet of the water-cooled roller is connected to the interior of the main cooling water tank through a first delivery pipeline. The liquid cooling system controls the flow rate of the main cooling circulation pump according to the temperature of the water-cooled roller. 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, with at least one first temperature sensor installed in the upper and lower parts of the main cold water tank respectively.

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

7. A method for adjusting the temperature of a printing device, characterized in that, The method of adjusting the temperature of different areas of a printing device using the integrated liquid cooling system of any one of claims 1 to 6 includes: S1: Get the current printing speed of the printing device; S2: Adjust the flow rate of the first delivery pipeline according to the printing speed of the printing equipment; S3: Get the current ambient temperature; S4: Obtain the actual temperature of the printing equipment's circuit board; S5: Adjust the flow rate of the second delivery pipeline according to the current ambient temperature and the actual temperature of the board; S6: Obtain the preset temperature of the print head when the printer is working; S7: Obtain the actual temperature of the printhead during printing operation; S8: Adjust the flow rate of the third delivery pipeline according to the preset temperature of the print head and the actual temperature of the print head.

8. The temperature regulation method for a printing device according to claim 7, characterized in that, S2: Adjusting the flow rate of the first delivery pipeline according to the printing speed of the printing equipment also includes: S21: Obtain the curve showing the relationship between printing speed and flow rate in the first delivery pipeline; S22: Determine the target flow rate of the first delivery pipeline based on the current printing speed of the printing equipment and the corresponding relationship curve; S23: Adjust the current flow rate of the first delivery pipeline to the target flow rate.

9. The temperature regulation method for a printing device according to claim 7, characterized in that, S5: Adjusting the flow rate of the second delivery pipeline according to the current ambient temperature and the actual temperature of the board also includes: S51: Obtain the curve showing the relationship between the board temperature and the flow rate of the second delivery pipeline; S52: Determine the target flow rate of the second delivery pipeline based on 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: The printing device includes an integrated liquid cooling system as described in any one of claims 1 to 6, wherein the liquid cooling system uniformly controls the main cooling control unit, the ambient temperature control unit, and the constant temperature control unit, and the printing device further includes a printing system, a paper path operation control system, and a printing mechanism control system, wherein the printing system communicates with the printing mechanism control system and the paper path operation control system respectively.

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