Intelligent circulation refrigeration control system for offset printing centralized liquid supply and using method thereof
Through the intelligent circulation refrigeration control system of centralized offset printing liquid supply, the problems of high maintenance costs and unstable temperature control of independent cooling devices of existing offset printing presses are solved, and the resource utilization rate is improved and printing quality is optimized.
Patent Information
- Application Number
- CN202411894842.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-02-18
AI Technical Summary
The independent cooling devices of existing offset printing presses require frequent maintenance, resulting in high maintenance costs and energy consumption costs, affecting printing quality and production efficiency. The accuracy and maintenance requirements of different brands and types of printing presses vary greatly, resulting in poor temperature control. Stability and maintenance complex.
The intelligent circulation refrigeration control system adopts offset printing centralized liquid supply, and realizes the combination of the central control system, refrigeration water storage and supply subsystem, intelligent circulation refrigeration and supply subsystem, recycling and recycling subsystem and pipeline subsystem. The centralized and intelligent supply of liquid and cooling water forms an independent circulation system of three pumps, optimizing temperature control and resource utilization.
Improve resource utilization, optimize temperature control, simplify maintenance processes, improve printing production efficiency and printing quality, reduce operating costs, and reduce energy waste. It is suitable for different types and brands of offset printing presses.
Smart Images
Figure CN119459106A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of offset printing circulating refrigeration control, and in particular to an intelligent circulating refrigeration control system for centralized liquid supply of offset printing and a use method thereof. Background Art
[0002] A printing press is a device used to print text and images. As the production scale of book and periodical printing and production companies expands and the number of product types increases, the differences in printing materials, production efficiency and application scenarios will become increasingly obvious. Therefore, it is necessary to use different types of printing equipment (sheet-fed offset presses, rotary offset presses, UV offset presses, etc.) to meet the needs of book and periodical products, color requirements, production efficiency and other aspects.
[0003] In the process of book and periodical printing, offset printing presses are mainly used to reproduce text and images. The temperature of the fountain solution in the offset printing process is crucial to maintaining printing quality and controlling the water-ink balance. Too high a temperature will cause water to evaporate too quickly, affecting the water-ink balance and reducing printing quality; while too low a temperature may cause the fountain solution to form an overly thick water film on the printing plate, affecting the ink's adhesion to the image area. It can be seen that keeping the temperature of the fountain solution stable can ensure good wetting effect and printing stability.
[0004] Therefore, offset printing presses are equipped with independent fountain solution tanks, which usually have independent built-in cooling devices for accurately controlling the temperature of the fountain solution to ensure that the fountain solution maintains a stable temperature range during the printing process. The independent cooling device built into the fountain solution tank needs regular maintenance, otherwise it is prone to failure or reduced cooling effect, which in turn affects the normal operation of the printing press. Since large-scale book and magazine printing companies usually have dozens of sheet-fed offset presses, rotary offset presses, commercial rotary offset presses, etc. of different types, brands, and models at the same time, such large-scale and different models of fountain solution tanks, their built-in independent cooling devices require more maintenance costs and energy costs during the production process, resulting in energy waste, which is not conducive to environmental protection. At the same time, it will also cause the temperature of the production environment to rise, which in turn affects the regulation of the fountain solution and increases the energy consumption, which is not conducive to the cost control of the enterprise.
[0005] However, the accuracy, maintenance requirements and environmental dependence of the fountain solution tanks and fountain solution cooling devices equipped for offset printing machines of different brands and types are different. These differences will seriously affect the production efficiency and operating costs of printing companies. Specifically, there are several main aspects: unstable temperature control, high maintenance costs, high dependence on the printing environment, temperature control differences and the inability to centrally allocate and supply fountain solution.
[0006] Therefore, it is urgent to develop an intelligent circulating refrigeration control system for centralized offset printing liquid supply to replace the independent cooling devices of existing offset printing presses of different types, and to carry out centralized cooling and control of the fountain solution to solve the above problems. Summary of the invention
[0007] The object of the present invention is to provide an intelligent circulating refrigeration control system for centralized liquid supply of offset printing, which concentrates the fountain solution and cooling water in one supply system, provides centralized and intelligent supply, maximizes resource utilization, optimizes temperature control, simplifies maintenance procedures, and thereby improves printing production efficiency and printing quality, and provides a method for using the same to solve the problems raised in the above-mentioned background technology.
[0008] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows: An intelligent circulating refrigeration control system for centralized liquid supply of offset printing includes a central control system, a refrigeration water storage and supply subsystem, an intelligent circulating refrigeration and supply subsystem, a recovery and recycling subsystem and a pipeline subsystem, wherein: The central control system includes a controller, a human-machine interface, a communication module, a data recording and analysis module, and an alarm and fault diagnosis module, and the human-machine interface, the communication module, the data recording and analysis module, and the alarm and fault diagnosis module are electrically connected to the controller respectively; The refrigeration water storage and supply subsystem includes multiple refrigeration devices, a water storage tank and a water replenishment port, wherein the water replenishment port is arranged on the water inlet side of the refrigeration device, and the refrigeration device is connected to the water storage tank through a pipeline; The intelligent circulation refrigeration and supply subsystem includes a heat exchanger, a fountain solution tank and a three-pump independent circulation system. The fountain solution tank is connected to the heat exchanger and the fountain solution and cooling water system of the printing press through the three-pump independent circulation system. The recovery and recycling subsystem includes a waste liquid recovery and treatment device; The pipeline subsystem includes a circulation pump and a circulation pipeline, and the pipeline subsystem connects the cooling water storage and supply subsystem, the intelligent circulation cooling and supply subsystem and the recovery processing and recycling subsystem to form a circulation path; The refrigeration device of the cooling water storage and supply subsystem, the fountain solution water tank and three-pump independent circulation system of the intelligent circulation refrigeration and supply subsystem, the circulation pump of the pipeline subsystem, and the recovery and recycling subsystem are electrically connected to the communication module of the central control system respectively.
[0009] Furthermore, the heat exchanger is provided with three groups of independently operated fluid passages, including one group of cold side fluid passages and two groups of hot side fluid passages, and each group of fluid passages includes an inlet, an outlet and an independent flow path, wherein the inlet and outlet of the cold side fluid passage are connected to the inlet and outlet of the refrigerated water storage and supply subsystem through a circulation pipe.
[0010] Furthermore, the heat exchanger is specifically a plate-type heat exchanger, and a group of cold-side fluid inlets and outlets and a group of hot-side fluid inlets and outlets are arranged on its fixed clamping plate, and a group of hot-side fluid inlets and outlets are arranged on its movable clamping plate. Two adjacent heat exchange baffles with only cold-side fluid openings are arranged in the middle of the heat exchanger, and the remaining heat exchange plates have both cold-side fluid openings and hot-side fluid openings.
[0011] Furthermore, the three-pump independent circulation system includes a controller, a circulation pump, an electrically controlled valve and a circulation pipeline, and the electrically controlled valve and the circulation pump are electrically connected to the controller respectively.
[0012] Furthermore, the fountain solution water tank is provided with a plurality of fluid inlets and outlets, and each of the fluid inlets and outlets is connected to each other through the circulation pump, the electrically controlled valve and the circulation pipeline of the three-pump independent circulation system to form three independent liquid circulation passages. Specifically: one of the outlets and one of the inlets of the fountain solution water tank are connected to one group of hot side fluid inlets and outlets of the heat exchanger through the circulation pipeline, the electrically controlled valve and the circulation pump to form a first independent circulation passage, and the electrically controlled valve is arranged at the water replenishment port on the liquid inlet side of the circulation pump; another outlet and another inlet are connected to the fountain solution circulation inlet and outlet of the printing press through the circulation pipeline and the circulation pump to form a second independent circulation passage; another group of hot side fluid inlets and outlets of the heat exchanger are connected to the coolant circulation inlet and outlet of the printing press through the circulation pipeline, the electrically controlled valve and the circulation pump to form a third independent circulation passage, and the electrically controlled valve is arranged at the water replenishment port on the hot side fluid outlet side of the heat exchanger, and the circulation pumps used in the first independent circulation passage and the third independent circulation passage are specifically variable frequency circulation pumps.
[0013] Furthermore, one of the outlets of the fountain solution tank is connected to the inlet of the recovery and recycling subsystem through the pipeline subsystem.
[0014] The present invention also provides a method for using an intelligent circulating refrigeration control system for centralized liquid supply of offset printing, which specifically comprises the following steps: S1 Startup and Adjustment: Start the intelligent circulation refrigeration control system with centralized liquid supply, set up the system, adjust parameters, and adjust each subsystem through the human-machine interface of the central control system, specifically: S11 starts the central control system and subsystems of the intelligent circulating refrigeration control system with centralized liquid supply, so that each subsystem reaches a stable state; S12 sets the parameters and floating range of each subsystem in the central control system, and sets the fault alarm threshold; S13 adjusts the specific working parameters and fault alarm thresholds of each subsystem, starts each subsystem and circulation path, and checks various indicators such as temperature and pressure sensors; S14 Detection and feedback of the communication module of the central control system and the communication and data transmission between each subsystem; S2 circulation operation: The cooling water generated by the cooling water storage and supply subsystem is transported to the intelligent circulation cooling and supply subsystem through the pipeline subsystem, and a supply and circulation, as well as a waste liquid recovery and treatment cycle are formed, specifically: The water supply circulation pump of the S21 refrigeration water storage and supply subsystem is started to transport the refrigeration water along the circulation pipeline to the cold side fluid path of the intelligent circulation refrigeration and supply subsystem, and then transport the refrigeration water to the hot side fluid path through the electric control valve of the water supply port; The S22 intelligent circulation refrigeration and supply subsystem uses a circulation pump to transfer the cooling water delivered to the hot side fluid path into the fountain solution water tank and automatically mix it into fountain solution. The fountain solution enters the fountain solution circulation system of the printing press, and enters the cooling water circulation system of the printing press. The electric control valve at the water supply port is closed, and a supply and circulation path is formed in the hot side fluid path. S23 Intelligent circulation refrigeration and supply subsystem starts the electric control valve at the outlet of the fountain solution tank, releases a small amount of fountain solution into the circulation pipeline and is transported to the recovery and recycling subsystem by the circulation pump to test the waste liquid recovery and recycling circulation path; S3 Monitoring and Adjustment: The sensors of the cooling water storage and supply subsystem and the intelligent circulation cooling and supply subsystem monitor the subsystem parameters in real time, and make timely adjustments to the deviations from the parameters set in step S12 and provide feedback and record relevant data, specifically: S31: the sensor in the water tank of the cooling water storage and supply subsystem monitors the cooling water temperature and water level data in real time, while the sensors in the fountain solution water tank of the intelligent circulation cooling and supply subsystem and the cooling water circulation system of the printing press monitor the fountain solution data and cooling water data in real time, and compare the monitoring data with the values set in step S12; S32 When a large deviation occurs in any of the monitoring data, the controller of the central control system sends instructions to the cooling water storage and supply subsystem and / or the intelligent cycle cooling and supply subsystem through the communication module to make corresponding adjustments so that the data with large deviations are restored to the set value; S4 Fault handling: When each subsystem deviates from the normal working range and cannot be restored to normal state through self-adjustment, the faulty subsystem sends a fault signal to the central control system, and the central control system automatically sends a command to the faulty subsystem to automatically shut down and issue a fault alarm to remind the staff to perform corresponding maintenance and restore it to normal operation.
[0015] Furthermore, in step S32, when the controller of the central control system sends instructions to the cooling water storage and supply subsystem for adjustment through the communication module, the specific steps are as follows: S321 When the temperature of the cooling water in the water storage tank of the cooling water storage and supply subsystem deviates from the set value range in step S12, the refrigeration device starts and adjusts the temperature of the cooling water in the water storage tank to restore it to the set value range; When the water level of the chilled water in the S322 water storage tank deviates from the set value range in step S12, the controller of the central control system sends a command to the electric control valve at the water supply port through the communication module to open it, replenish normal temperature water into the refrigeration device to adjust the water temperature to the set value range in step S12, until the water level of the chilled water in the water storage tank returns to the set value range in step S12.
[0016] Furthermore, in step S32, when the controller of the central control system sends instructions to the intelligent cycle refrigeration and supply subsystem through the communication module for adjustment, the specific steps are as follows: S323 When the temperature of the fountain solution in the fountain solution tank of the intelligent circulation refrigeration and supply subsystem deviates from the set value range in step S12, the sub-controller sends a command to the variable frequency circulation pump to adjust the flow rate of the fountain solution in the heat exchanger, and adjusts the heat exchange efficiency in the heat exchanger by adjusting the flow rate, thereby adjusting the temperature of the fountain solution to restore the temperature of the fountain solution to the set value range; When the water level of the dampening liquid in the dampening liquid tank deviates from the set value range in step S12, the sub-controller sends a command to the electronically controlled valve to open, so that the cooling water enters the dampening liquid tank from the water supply port 2 via the variable frequency circulation pump. At the same time, the sub-controller sends a command to the dampening liquid stock pump in the dampening liquid tank to start replenishing the dampening liquid stock, so that the dampening liquid returns to the set water level range; S325 When the fountain solution parameter in the fountain solution tank deviates from the set value range in step S12, if the fountain solution parameter is less than the set value, the sub-controller sends a command to the fountain solution pump in the fountain solution tank to start replenishing the fountain solution so that the fountain solution parameter is restored to the set range; if the fountain solution parameter is greater than the set value, the sub-controller sends a command to the electronically controlled valve to open, so that the cooling water enters the fountain solution tank from the water replenishment port 2 through the variable frequency circulation pump, so that the fountain solution parameter is restored to the set range; When the water temperature in the cooling water circulation system of the printing press of the S326 intelligent circulation refrigeration and supply subsystem deviates from the set value, the subcontroller sends a command to the variable frequency circulation pump to adjust the flow rate of the cooling water in the heat exchanger, and adjusts the heat exchange efficiency in the heat exchanger by adjusting the flow rate, thereby adjusting the cooling water temperature to restore the cooling water temperature to the set value range; When the water pressure in the cooling water circulation system of the S327 printing press deviates from the set value, the sub-controller sends a command to the electronically controlled valve to open, so that the cooling water enters the cooling water circulation system of the printing press from the second water supply port through the variable frequency circulation pump, so that the water pressure returns to the set value range.
[0017] The beneficial effects of the present invention are: The present invention firstly concentrates dampening solution and cooling water in a supply system, supplies them in a centralized and intelligent manner, forms a three-pump independent circulation system, and combines a heat exchanger and a dampening solution water tank to form a dampening solution and cooling water centralized supply subsystem, real-time monitoring and automatic regulation of dampening solution and cooling water data of a single offset printing equipment are carried out to maintain them within a set range, resource utilization is maximized, temperature control is optimized, maintenance procedures are simplified, and printing production efficiency and printing quality are improved; then, dampening solution and cooling water centralized supply subsystems of all types of offset printing equipment within the enterprise are combined into a large intelligent circulation refrigeration and supply subsystem; finally, a complete offset printing centralized liquid supply intelligent circulation refrigeration control system is formed through a central control system, a cooling water storage and supply subsystem, an intelligent circulation refrigeration and supply subsystem, a recovery and recycling subsystem, and a pipeline subsystem, and a centralized, intelligent, and digital dampening solution and cooling water circulation supply are carried out for the offset printing equipment of the entire company, which saves the operating costs of the enterprise as a whole, improves production effects and product quality, and enhances the market competitiveness of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the centralized liquid supply intelligent circulation refrigeration control system of the present invention; Figure 2 This is a schematic diagram of the structure of the centralized liquid supply intelligent circulation refrigeration control system of the present invention; Figure 3 It is a schematic diagram of the structure of the intelligent cycle refrigeration and supply subsystem of the present invention; Figure 4 It is a structural schematic diagram of the intelligent cycle refrigeration device of the present invention; Figure 5 It is a schematic diagram of the heat exchanger structure of the present invention; Figure 6 It is a schematic diagram of the flow path structure of the heat exchanger of the present invention.
[0019] In the figure: 1. Central control system, 11. Controller, 12. Human-machine interface, 13. Communication module, 14. Data recording and analysis module, 15. Alarm and fault diagnosis module; 2. Refrigeration water storage and supply subsystem, 21. Refrigeration device, 22. Water storage tank, 23. Water supply port 1; 3. Intelligent circulation refrigeration and supply subsystem, 31. Heat exchanger, 310. Fluid passage, 3101. Cold side fluid passage, 3102. Hot side fluid passage, 311. Fixed clamping plate, 3111. Cold side fluid inlet, 3112. Cold side fluid outlet, 3113. Hot side fluid inlet 1, 3114. Hot side fluid outlet 1, 312. Movable clamping plate, 3121. Hot side fluid inlet 2, 3122. Hot side fluid outlet 2, 313. Heat exchange baffle, 314. Fluid port, 315. Heat exchange plate, 32. Foaming liquid water tank, 33. Three-pump independent circulation system, 331. Sub-controller, 332. Variable frequency circulation pump, 333. Circulation pump 2, 334. Electric control valve, 335. Water supply port 2; 4. Recovery and recycling subsystem, 41. Waste liquid recovery and treatment device; 5. Pipeline subsystem, 51. Circulation pump, 52. Circulation pipeline; 6. Printing press, 61. Sheet-fed offset press, 62. Web offset press, 63. Commercial web offset press. DETAILED DESCRIPTION
[0020] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.
[0021] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0023] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0024] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.
[0025] like Figure 1-Figure 2 As shown, this embodiment discloses an intelligent circulating refrigeration control system for centralized liquid supply of offset printing, including a central control system 1, a refrigerated water storage and supply subsystem 2, an intelligent circulating refrigeration and supply subsystem 3, a recycling and recycling subsystem 4 and a pipeline subsystem 5, wherein: The central control system 1 comprises a controller 11, a human-machine interface 12, a communication module 13, a data recording and analysis module 14 and an alarm and fault diagnosis module 15, wherein the human-machine interface 12, the communication module 13, the data recording and analysis module 14 and the alarm and fault diagnosis module 15 are electrically connected to the controller 11 respectively; The cooling water storage and supply subsystem 2 comprises a plurality of cooling devices 21, a water storage tank 22 and a water replenishment port 23. The water replenishment port 23 is arranged at the water inlet side of the cooling device 21. The cooling device 21 is connected to the water storage tank 22 through a pipeline. The intelligent circulation refrigeration and supply subsystem 3 includes a heat exchanger 31, a fountain solution tank 32 and a three-pump independent circulation system 33. The fountain solution tank 32 is connected to the heat exchanger 31 and the fountain solution 34 and cooling water 35 systems of the printing press through the three-pump independent circulation system 33; The recovery and recycling subsystem 4 includes a waste liquid recovery and treatment device 41; The pipeline subsystem 5 includes a circulation pump 51 and a circulation pipeline 52. The pipeline subsystem 5 connects the cooling water storage and supply subsystem 2, the intelligent circulation cooling and supply subsystem 3 and the recycling and recirculation subsystem 4 to form a circulation path; The refrigeration device 21 of the cooling water storage and supply subsystem 2, the fountain solution tank 32 and the three-pump independent circulation system 33 of the intelligent circulation refrigeration and supply subsystem 3, the circulation pump 51 of the pipeline subsystem 5, and the recovery and recycling subsystem 4 are electrically connected to the communication module 13 of the central control system 1 respectively.
[0026] In this embodiment, the refrigeration device 21 of the cooling water storage and supply subsystem 2 is specifically an industrial refrigerator. An industrial refrigerator is a device used to transfer heat from a low-temperature object to an ambient medium. It is widely used in various industrial production processes. Its main function is to control the temperature through cooling water or other liquids to ensure the stable operation of the equipment and products. Modern industrial refrigerators are usually equipped with advanced computer control systems and safety protection devices to ensure the stable operation of the equipment and the safety of operation.
[0027] The water tank 22 of the cooling water storage and supply subsystem 2 is specifically an insulated water tank. The insulated water tank is a device used to store and maintain water temperature. Its main function is to reduce heat loss through special insulation materials, thereby extending the stabilization time of water temperature, reducing energy consumption, and preventing the water tank from freezing in cold conditions or overheating in warm environments. At the same time, a temperature sensor is usually installed in the insulated water tank to monitor and control the water temperature.
[0028] In order to ensure the normal operation of the cooling water storage and supply subsystem 2 and the supply of cooling water, the water storage tank 22 in this embodiment is connected to three sets of refrigeration devices 21, two of which are working normally and one is a standby. When one of the normally working refrigeration devices 21 fails and cannot operate normally, a fault signal is fed back to the communication module 13 and finally transmitted to the central controller 11. The controller 11 transmits a signal to the alarm and fault diagnosis module 15 to send an error alarm and report a repair, and at the same time transmits a signal to the communication module 13 to start the standby refrigeration device 21 and shut down the faulty refrigeration device 21.
[0029] like Figure 3-4 As shown, in the intelligent circulation refrigeration and supply subsystem 3, the three-pump independent circulation system 33 includes a sub-controller 331, two variable frequency circulation pumps 332, a circulation pump 2 333, an electric control valve 334 and a circulation pipeline 52, and the electric control valve 334 and the variable frequency circulation pump 332 and the circulation pump 2 333 are electrically connected to the controller 331 respectively.
[0030] Furthermore, the fountain solution water tank 32 is provided with a plurality of fluid inlets and outlets, namely, outlet 1 321, inlet 1 322, outlet 2 323, inlet 2 324, outlet 3 325, and each fluid inlet and outlet is connected to form three independent liquid circulation paths through the variable frequency circulation pump 332, circulation pump 2 333, electric control valve 334 and circulation pipeline 52 of the three-pump independent circulation system 33. Specifically: Figure 3 As shown, the outlet 1 321 and the water inlet 1 322 of the fountain solution water tank 32 are connected with the hot side fluid inlet 1 3113 and the hot side fluid outlet 1 3114 of the hot side fluid 1 of the heat exchanger 31 through the circulation pipe 52, the electric control valve 334 and the variable frequency circulation pump 332 to form a first independent circulation passage j. The electric control valve 334 is arranged at the water replenishment port 2 335 on the liquid inlet side of the variable frequency circulation pump 332. The first independent circulation passage j is mainly used to ensure that the temperature of the fountain solution in the fountain solution water tank 32 is maintained within a stable range; wherein the outlet 2 323 and the water inlet 2 324 are connected with the fountain solution circulation inlet and outlet of the printing press 6 through the circulation pipe 52 and the circulation pump 2 333 to form a second Independent circulation passage k, the second independent circulation passage k is mainly used for the circulation supply of the fountain solution of the printing machine 6 to ensure the normal water supply work when the printing machine 6 is running; the hot side fluid inlet 3121 and the hot side fluid outlet 3122 of the heat exchanger 31 are connected with the coolant circulation inlet and outlet of the printing machine 6 through the circulation pipe 52, the electric control valve 334 and the variable frequency circulation pump 332 to form a third independent circulation passage l, the electric control valve 334 is arranged on the side of the hot side fluid outlet 3122 of the heat exchanger 31. The third independent circulation passage l is mainly used to ensure that the temperature of the coolant in the printing machine 6 is maintained within a stable range during the circulation process, so as to ensure the cooling of the main components of the printing machine 6.
[0031] Furthermore, the water outlet three 325 of the fountain solution water tank 32 is connected to the inlet of the recovery and recycling subsystem 4 through the pipe subsystem 5. The function of the water outlet three 325 is to regularly drain the fountain solution that has been used for a long time in the fountain solution water tank 32, clean the inside of the fountain solution water tank 32, and then automatically re-mix new fountain solution.
[0032] Since the fountain solution will evaporate, transfer and be consumed during use, it is necessary to compensate the fountain solution in real time. The fountain solution tank 32 has the function of automatically proportioning the fountain solution. The cooling water required is controlled by the fountain solution tank 32 through the shunt pipe at the cold side fluid inlet 3111 of the heat exchanger 31 through the water replenishment port 2 335 and the electric control valve 334 to ensure that the fountain solution in the fountain solution tank 32 is sufficient without affecting normal production. The cooling water of the printing machine 6 will also be consumed to a certain extent during the circulation process, so it also needs to be replenished in time according to actual conditions. The cooling water required is controlled by the cooling water circulation system of the printing machine 6 through the shunt pipe at the cold side fluid inlet 3111 of the heat exchanger 31 through the water replenishment port 2 335 and the electric control valve 334. The replenishment of the fountain solution cooling water and the printing machine cooling water is controlled by the sub-controller 331 in the intelligent circulation refrigeration and supply subsystem 3 to control the opening and closing of the electric control valve 334. At the same time, a valve is provided on the cooling water circulation pipeline of the printing machine 6 for regularly discharging and replacing the cooling water of the printing machine 6 .
[0033] like Figure 5-6 As shown, the heat exchanger 31 is provided with three groups of independently operated fluid passages 310, including a group of cold side fluid passages 3101 and two groups of hot side fluid passages 3102, and each group of fluid passages 310 includes an inlet, an outlet and an independent flow path, wherein the inlet and outlet of the cold side fluid passage 3101 are connected to the inlet and outlet of the cooling water storage and supply subsystem 2 through a circulation pipe 52.
[0034] In this embodiment, the heat exchanger 31 uses a plate heat exchanger, which is assembled from a series of thin metal plates and is used for heat exchange between liquids or between liquids and gases. In this embodiment, it is used for heat exchange between external cooling water and the fountain solution of the printing press. The core of the plate heat exchanger is a heat exchange unit composed of multiple metal plates stacked together. These plates are corrugated to form independent flow channels between each plate. The cold and hot fluids pass through the flow channels between the plates. The cold and hot fluids flow in opposite directions on both sides of the plates, so that the heat of the hot fluid is transferred to the cold fluid through the metal plate. It has efficient heat exchange performance, and during the working process, it does not directly consume electrical energy. Compared with the refrigeration device of the traditional fountain solution water tank, it is more energy-saving and will not affect the surrounding environment temperature due to its own heat during work.
[0035] The heat exchanger 31 is specifically a plate heat exchanger, and certain improvements have been made to it. A group of cold side fluid inlets and outlets: cold side fluid inlet 3111 and cold side fluid outlet 3112, and a group of hot side fluid inlets and outlets: hot side fluid inlet 3113 and hot side fluid outlet 3114 are arranged on its fixed clamping plate 311. The cold side fluid inlet 3111, cold side fluid outlet 3112, fluid opening 314 on the heat exchange plate 315 and corrugated flow channel together form a cold side fluid passage 3101. The hot side fluid inlet 3113, hot side fluid outlet 3114, fluid opening 314 on the heat exchange plate 315 and corrugated flow channel together form a hot side fluid passage 3102 for use in heat exchange of hot side fluid. The movable clamping plate 312 of the heat exchanger 31 is provided with a group of hot side fluid 2 inlet and outlet: hot side fluid inlet 2 3121 and hot side fluid outlet 2 3122. The hot side fluid inlet 2 3121, hot side fluid outlet 2 3122, and the fluid opening 314 and corrugated flow channel on the heat exchange plate 315 together form a hot side fluid passage 3102 for use in heat exchange of hot side fluid 2. Two adjacent heat exchange baffles 313 with only cold side fluid openings 314 are provided in the middle of the heat exchanger 31. The heat exchange baffles 313 separate hot side fluid 1 from hot side fluid 2. Because the temperature and flow rate of hot side fluid 1 and hot side fluid 2 are different, the remaining heat exchange plates 315 have both cold side fluid openings 314 and hot side fluid openings 314.
[0036] like Figure 2As shown, in this embodiment, due to production needs, at least three types of printing machines 6, such as a sheet-fed offset printing machine 61, a rotary offset printing machine 62 and a commercial rotary printing machine 63, are arranged in the production site, wherein the sheet-fed offset printing machine 61, the rotary offset printing machine 62 and the commercial rotary printing machine 63 respectively correspond to their matching fountain solution water tanks 32, so the cooling water in the cooling water storage tank 22 is pumped into the corresponding heat exchanger 31 through the circulation pump 51 through the circulation pipe 52, and the water outlet 323 of the fountain solution water tank 32 is connected to the circulation pump 333 of the water inlet of the fountain system of the offset printing machine 6, and the fountain solution water tank 32 is connected to the water outlet of the fountain system of the offset printing machine 6 through its water inlet 324. It should be noted that the sheet-fed offset printing press 61, the rotary offset printing press 62 and the commercial rotary printing press 63 have different requirements for the temperature and ratio of the fountain solution, which is mainly determined by their printing speed, equipment structure and sensitivity to the water-ink balance. Therefore, the fountain solution cannot be centrally proportioned and supplied. Only printing presses of the same type and model can centrally proportion and supply the fountain solution. Therefore, the corresponding fountain solution tanks 32 need to be retained, but the dedicated refrigeration devices of these fountain solution tanks 32 do not need to be retained. The dedicated refrigeration devices of the fountain solution tanks 32 are replaced by external heat exchangers 31. For 2-4 printing presses 6 of the same type and model in the same production site, the same fountain solution tank 32 can be used for centralized liquid supply in a small area to reduce the number of intelligent circulating refrigeration and supply subsystems 3, thereby reducing site occupancy and production energy consumption.
[0037] like Figure 2 As shown, the circulation pipeline 52 of the pipeline subsystem 5 forms two main closed-loop circulation passages, one of which is the passage (1-1) in which the water storage tank 22 is connected to the cold side fluid inlet 3111 of the heat exchanger 31 through the circulation pump 51 and the circulation pipeline 52, and the cold side fluid outlet 3112 of the heat exchanger 31 is connected to the refrigeration device 21 through the circulation pump 51 and the circulation pipeline 52 (1-2); the other is the passage (2-1) in which the outlet 325 of the fountain solution water tank 32 is connected to the water inlet of the waste liquid recovery treatment device 41 of the recovery and recycling subsystem 4 through the electric control valve 334 and the circulation pipeline 52 and the circulation pump 51, and the outlet of the waste liquid recovery treatment device 41 is connected to the refrigeration device 21 through the circulation pipeline 52 and the circulation pump 51 (2-2).
[0038] The present invention also provides a method for using an intelligent circulating refrigeration control system for centralized liquid supply of offset printing, which specifically comprises the following steps: S1 Startup and Adjustment: Start the intelligent circulation refrigeration control system with centralized liquid supply, set up the system, adjust parameters, and adjust each subsystem through the human-machine interface 12 of the central control system 1, specifically: S11 starts the central control system 1 and each subsystem of the intelligent circulating refrigeration control system with centralized liquid supply, so that each subsystem reaches a stable state; S12 sets the parameters and floating range of each subsystem in the central control system 1, and sets the fault alarm threshold; S13 adjusts the specific working parameters and fault alarm thresholds of each subsystem, starts each subsystem and circulation path, and checks the indicators of temperature, pressure and water level sensors; S14 detection and feedback of the communication module 13 of the central control system 1 and the communication and data transmission between the subsystems; S2 circulation operation: The refrigerated water generated by the refrigerated water storage and supply subsystem 2 is transported to the intelligent circulation refrigeration and supply subsystem 3 through the pipeline subsystem 5, and a supply and circulation, as well as a waste liquid recovery and treatment cycle are formed, specifically: S21 The water supply circulation pump 51 of the cooling water storage and supply subsystem 2 is started to transport the cooling water along the circulation pipeline 52 to the cold side fluid passage (1-1) of the intelligent circulation cooling and supply subsystem 3, and then transport the cooling water to the hot side fluid passage through the electric control valve 334 of the water supply port 2 335; S22 The intelligent circulation refrigeration and supply subsystem 3 uses the variable frequency circulation pump 332 to transport the cooling water in the hot side fluid passage. One of the cooling water enters the fountain solution tank 32 and is automatically prepared into fountain solution by the fountain solution tank 32. The fountain solution enters the fountain solution circulation system of the printing press, and the other enters the cooling water circulation system of the printing press. The electric control valve 334 at the second water supply port 335 is closed, and a supply and circulation passage is formed in the hot side fluid passage. S23 The intelligent circulation refrigeration and supply subsystem 3 starts the electric control valve 334 of the water outlet 325 of the fountain solution water tank 32, releases a small part of the fountain solution into the circulation pipeline 52 and is transported to the recovery and recycling subsystem 4 by the circulation pump 51, and tests the waste liquid recovery and recycling circulation path; S3 monitoring and adjustment: The temperature, pressure and water level sensors of the cooling water storage and supply subsystem 2 and the intelligent circulation cooling and supply subsystem 3 monitor the subsystem parameters in real time, and make timely adjustments and feedback and record relevant data for deviations from the parameters set in step S12, specifically: S31 The temperature and water level sensors in the water tank 22 of the cooling water storage and supply subsystem 2 monitor the cooling water temperature and water level data in real time. Meanwhile, the temperature, water level, pH value and conductivity sensors of the fountain solution water tank 32 of the intelligent circulation cooling and supply subsystem 3 monitor the fountain solution data in real time. The temperature and pressure sensors of the cooling water circulation system of the printing machine 6 monitor the cooling water temperature and pressure in real time, and compare the monitoring data with the values set in step S12. S32 When a large deviation occurs in any of the monitoring data, the controller 11 of the central control system 1 sends a command to the cooling water storage and supply subsystem 2 and / or the intelligent cycle cooling and supply subsystem 3 through the communication module 13 to make corresponding adjustments so that the data with large deviations are restored to the set value; S4 Fault handling: When each subsystem deviates from the normal working range and cannot be restored to normal state through self-adjustment, the faulty subsystem transmits the fault signal to the controller 11 through the communication module 13. The controller 11 sends a shutdown signal to the faulty device through the communication module 13 and sends a fault alarm through the alarm and fault diagnosis module 15 to remind the staff to perform corresponding maintenance and restore it to normal operation.
[0039] In step S32, when the controller 11 of the central control system 1 sends instructions to the cooling water storage and supply subsystem 2 for adjustment through the communication module 13, the specific steps are as follows: S321 When the temperature of the cooling water in the water storage tank 22 of the cooling water storage and supply subsystem 2 deviates from the set value range in step S12, the refrigeration device 21 starts and adjusts the temperature of the cooling water in the water storage tank 22 to restore it to the set value range; S322 When the water level of the chilled water in the water storage tank 22 deviates from the set value range in step S12, the controller 11 of the central control system 1 sends an instruction to the electric control valve at the water supply port 23 through the communication module 13 to open, replenish normal temperature water into the refrigeration device 21 to adjust the water temperature to the set value range in step S12, until the water level of the chilled water in the water storage tank 22 returns to the set value range in step S12.
[0040] In step S32, when the controller 11 of the central control system 1 sends instructions to the intelligent cycle refrigeration and supply subsystem 3 through the communication module 13 for adjustment, the specific steps are as follows: S323 When the temperature of the dampening solution in the dampening solution tank 32 of the intelligent circulating refrigeration and supply subsystem 3 deviates from the set value range in step S12, the subcontroller 331 sends a command to the variable frequency circulating pump 332 to adjust the flow rate of the dampening solution in the heat exchanger 31, and adjusts the heat exchange efficiency in the heat exchanger 31 by adjusting the flow rate, thereby adjusting the temperature of the dampening solution to restore the temperature of the dampening solution to the set value range; When the water level of the dampening liquid in the dampening liquid tank 32 deviates from the set value range in step S12, the sub-controller 331 sends a command to the electronically controlled valve 334 to open, so that the cooling water enters the dampening liquid tank 32 from the water replenishment port 2 335 via the variable frequency circulation pump 332. At the same time, the sub-controller 331 sends a command to the dampening liquid stock liquid pump of the dampening liquid tank 32 to start replenishing the dampening liquid stock liquid, so that the dampening liquid returns to the set water level range; S325 When the parameters of the fountain solution (conductivity and / or Ph value, etc.) in the fountain solution tank 32 deviate from the set value range in step S12, if the fountain solution parameters are less than the set value, the sub-controller 331 sends a command to the fountain solution pump of the fountain solution tank 32 to start replenishing the fountain solution so that the fountain solution parameters are restored to the set range; if the fountain solution parameters are greater than the set value, the sub-controller 331 sends a command to the electronically controlled valve 334 to open, so that the cooling water enters the fountain solution tank 32 from the water replenishment port 2 335 through the variable frequency circulation pump 332, so that the fountain solution parameters are restored to the set range; S326 When the water temperature in the cooling water circulation system of the printing machine 6 of the intelligent circulating refrigeration and supply subsystem 3 deviates from the set value, the sub-controller 331 sends a command to the variable frequency circulating pump 332 to adjust the flow rate of the cooling water in the heat exchanger 31, and adjusts the heat exchange efficiency in the heat exchanger 31 by adjusting the flow rate, thereby adjusting the cooling water temperature to restore the cooling water temperature to the set value range; S327 When the water pressure in the cooling water circulation system of the printing machine 6 deviates from the set value, the sub-controller 331 sends a command to the electric control valve 334 to open, so that the cooling water enters the cooling water circulation system of the printing machine 6 from the water supply port 2 335 through the variable frequency circulation pump 332, so that the water pressure returns to the set value range.
[0041] When the temperature of the dampening solution is high, the speed of the variable frequency circulation pump 332 is reduced, so that the flow rate of the dampening solution in the heat exchanger 31 is slowed down to increase the heat exchange time and thus increase the heat exchange to reduce the temperature of the dampening solution. When the temperature of the dampening solution is low, the speed of the variable frequency circulation pump 332 is accelerated, so that the flow rate of the dampening solution in the heat exchanger 31 is accelerated to reduce the heat exchange time and thus reduce the heat exchange, so that the higher temperature dampening solution circulated back from the dampening solution circulation system of the printing machine is mixed with the dampening solution in the dampening solution water tank 32 to increase the overall dampening solution temperature. The water temperature adjustment method in the cooling water circulation system of the printing machine 6 is consistent with the dampening solution temperature adjustment method.
[0042] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. An intelligent circulating refrigeration control system for centralized liquid supply of offset printing, comprising a central control system, a refrigeration water storage and supply subsystem, an intelligent circulating refrigeration and supply subsystem, a recovery and recycling subsystem and a pipeline subsystem, characterized in that: The central control system includes a controller, a human-machine interface, a communication module, a data recording and analysis module, and an alarm and fault diagnosis module, and the human-machine interface, the communication module, the data recording and analysis module, and the alarm and fault diagnosis module are electrically connected to the controller respectively; The refrigeration water storage and supply subsystem includes multiple refrigeration devices, a water storage tank and a water replenishment port, wherein the water replenishment port is arranged on the water inlet side of the refrigeration device, and the refrigeration device is connected to the water storage tank through a pipeline; The intelligent circulation refrigeration and supply subsystem includes a heat exchanger, a fountain solution tank and a three-pump independent circulation system. The fountain solution tank is connected to the heat exchanger and the fountain solution and cooling water system of the printing press through the three-pump independent circulation system. The recovery and recycling subsystem includes a waste liquid recovery and treatment device; The pipeline subsystem includes a circulation pump and a circulation pipeline, and the pipeline subsystem connects the cooling water storage and supply subsystem, the intelligent circulation cooling and supply subsystem and the recovery processing and recycling subsystem to form a circulation path; The refrigeration device of the cooling water storage and supply subsystem, the fountain solution water tank and three-pump independent circulation system of the intelligent circulation refrigeration and supply subsystem, the circulation pump of the pipeline subsystem, and the recovery and recycling subsystem are electrically connected to the communication module of the central control system respectively.
2. The intelligent circulating refrigeration control system for centralized liquid supply for offset printing according to claim 1 is characterized in that: The heat exchanger is provided with three groups of independently operated fluid passages, including one group of cold side fluid passages and two groups of hot side fluid passages, and each group of fluid passages includes an inlet, an outlet and an independent flow path, wherein the inlet and outlet of the cold side fluid passage are connected to the inlet and outlet of the refrigerated water storage and supply subsystem through a circulation pipe.
3. The intelligent circulating refrigeration control system for centralized liquid supply for offset printing according to claim 1 is characterized in that: The heat exchanger is specifically a plate heat exchanger, and a group of cold side fluid inlets and outlets and a group of hot side fluid inlets and outlets are arranged on its fixed clamping plate, and a group of hot side fluid inlets and outlets are arranged on its movable clamping plate. Two adjacent heat exchange baffles with only cold side fluid openings are arranged in the middle of the heat exchanger, and the remaining heat exchange plates have both cold side fluid openings and hot side fluid openings.
4. The intelligent circulating refrigeration control system for centralized liquid supply for offset printing according to claim 1 is characterized in that: The three-pump independent circulation system comprises a controller, a circulation pump, an electric-controlled valve and a circulation pipeline, and the electric-controlled valve and the circulation pump are electrically connected to the controller respectively.
5. The intelligent circulating refrigeration control system for centralized liquid supply for offset printing according to claim 1 is characterized in that: The fountain solution water tank is provided with a plurality of fluid inlets and outlets, and each of the fluid inlets and outlets is connected to each other through the circulation pump, the electric control valve and the circulation pipeline of the three-pump independent circulation system to form three independent liquid circulation passages. Specifically: one of the outlets and one of the inlets of the fountain solution water tank are connected to one group of hot side fluid inlets and outlets of the heat exchanger through the circulation pipeline, the electric control valve and the circulation pump to form a first independent circulation passage, and the electric control valve is arranged at the water replenishment port on the liquid inlet side of the circulation pump; another outlet and another inlet are connected to the fountain solution circulation inlet and outlet of the printing press through the circulation pipeline and the circulation pump to form a second independent circulation passage; another group of hot side fluid inlets and outlets of the heat exchanger are connected to the coolant circulation inlet and outlet of the printing press through the circulation pipeline, the electric control valve and the circulation pump to form a third independent circulation passage, and the electric control valve is arranged at the water replenishment port on the hot side fluid outlet side of the heat exchanger, and the circulation pumps used in the first independent circulation passage and the third independent circulation passage are specifically variable frequency circulation pumps.
6. The intelligent circulating refrigeration control system for centralized liquid supply for offset printing according to claim 1 is characterized in that: One of the outlets of the fountain solution water tank is connected to the inlet of the recovery and recycling subsystem through the pipeline subsystem.
7. A method for using an intelligent circulating refrigeration control system for centralized liquid supply in offset printing, comprising the following steps: S1 Startup and Adjustment: Start the intelligent circulation refrigeration control system with centralized liquid supply, set up the system, adjust parameters, and adjust each subsystem through the human-machine interface of the central control system, specifically: S11 starts the central control system and subsystems of the intelligent circulating refrigeration control system with centralized liquid supply, so that each subsystem reaches a stable state; S12 sets the parameters and floating range of each subsystem in the central control system, and sets the fault alarm threshold; S13 adjusts the specific working parameters and fault alarm thresholds of each subsystem, starts each subsystem and circulation path, and checks various indicators such as temperature and pressure sensors; S14 Detection and feedback of the communication module of the central control system and the communication and data transmission between each subsystem; S2 circulation operation: The cooling water generated by the cooling water storage and supply subsystem is transported to the intelligent circulation cooling and supply subsystem through the pipeline subsystem, and a supply and circulation, as well as a waste liquid recovery and treatment cycle are formed, specifically: The water supply circulation pump of the S21 refrigeration water storage and supply subsystem is started to transport the refrigeration water along the circulation pipeline to the cold side fluid path of the intelligent circulation refrigeration and supply subsystem, and then transport the refrigeration water to the hot side fluid path through the electric control valve of the water supply port; The S22 intelligent circulation refrigeration and supply subsystem uses a circulation pump to transfer the cooling water delivered to the hot side fluid path into the fountain solution water tank and automatically mix it into fountain solution. The fountain solution enters the fountain solution circulation system of the printing press, and enters the cooling water circulation system of the printing press. The electric control valve at the water supply port is closed, and a supply and circulation path is formed in the hot side fluid path. S23 Intelligent circulation refrigeration and supply subsystem starts the electric control valve at the outlet of the fountain solution tank, releases a small amount of fountain solution into the circulation pipeline and is transported to the recovery and recycling subsystem by the circulation pump to test the waste liquid recovery and recycling circulation path; S3 Monitoring and Adjustment: The sensors of the cooling water storage and supply subsystem and the intelligent circulation cooling and supply subsystem monitor the subsystem parameters in real time, and make timely adjustments to the deviations from the parameters set in step S12 and provide feedback and record relevant data, specifically: S31: the sensor in the water tank of the cooling water storage and supply subsystem monitors the cooling water temperature and water level data in real time, while the sensors in the fountain solution water tank of the intelligent circulation cooling and supply subsystem and the cooling water circulation system of the printing press monitor the fountain solution data and cooling water data in real time, and compare the monitoring data with the values set in step S12; S32 When a large deviation occurs in any of the monitoring data, the controller of the central control system sends instructions to the cooling water storage and supply subsystem and / or the intelligent cycle cooling and supply subsystem through the communication module to make corresponding adjustments so that the data with large deviations are restored to the set value; S4 Fault handling: When each subsystem deviates from the normal working range and cannot be restored to normal state through self-adjustment, the faulty subsystem sends a fault signal to the central control system, and the central control system automatically sends a command to the faulty subsystem to automatically shut down and issue a fault alarm to remind the staff to perform corresponding maintenance and restore it to normal operation.
8. The method for using the intelligent circulating refrigeration control system for centralized liquid supply for offset printing according to claim 7, characterized in that: In step S32, when the controller of the central control system sends instructions to the cooling water storage and supply subsystem for adjustment through the communication module, the specific steps are as follows: S321 When the temperature of the cooling water in the water storage tank of the cooling water storage and supply subsystem deviates from the set value range in step S12, the refrigeration device starts and adjusts the temperature of the cooling water in the water storage tank to restore it to the set value range; When the water level of the chilled water in the S322 water storage tank deviates from the set value range in step S12, the controller of the central control system sends a command to the electric control valve at the water supply port through the communication module to open it, replenish normal temperature water into the refrigeration device to adjust the water temperature to the set value range in step S12, until the water level of the chilled water in the water storage tank returns to the set value range in step S12.
9. The method for using the intelligent circulating refrigeration control system for centralized liquid supply for offset printing according to claim 7, characterized in that: In step S32, when the controller of the central control system sends instructions to the intelligent cycle refrigeration and supply subsystem through the communication module for adjustment, the specific steps are as follows: S323 When the temperature of the fountain solution in the fountain solution tank of the intelligent circulation refrigeration and supply subsystem deviates from the set value range in step S12, the sub-controller sends a command to the variable frequency circulation pump to adjust the flow rate of the fountain solution in the heat exchanger, and adjusts the heat exchange efficiency in the heat exchanger by adjusting the flow rate, thereby adjusting the temperature of the fountain solution to restore the temperature of the fountain solution to the set value range; When the water level of the dampening liquid in the dampening liquid tank deviates from the set value range in step S12, the sub-controller sends a command to the electronically controlled valve to open, so that the cooling water enters the dampening liquid tank from the water supply port 2 via the variable frequency circulation pump. At the same time, the sub-controller sends a command to the dampening liquid stock pump in the dampening liquid tank to start replenishing the dampening liquid stock, so that the dampening liquid returns to the set water level range; S325 When the fountain solution parameter in the fountain solution tank deviates from the set value range in step S12, if the fountain solution parameter is less than the set value, the sub-controller sends a command to the fountain solution pump in the fountain solution tank to start replenishing the fountain solution so that the fountain solution parameter is restored to the set range; if the fountain solution parameter is greater than the set value, the sub-controller sends a command to the electronically controlled valve to open, so that the cooling water enters the fountain solution tank from the water replenishment port 2 through the variable frequency circulation pump, so that the fountain solution parameter is restored to the set range; When the water temperature in the cooling water circulation system of the printing press of the S326 intelligent circulation refrigeration and supply subsystem deviates from the set value, the subcontroller sends a command to the variable frequency circulation pump to adjust the flow rate of the cooling water in the heat exchanger, and adjusts the heat exchange efficiency in the heat exchanger by adjusting the flow rate, thereby adjusting the cooling water temperature to restore the cooling water temperature to the set value range; When the water pressure in the cooling water circulation system of the S327 printing press deviates from the set value, the sub-controller sends a command to the electronically controlled valve to open, so that the cooling water enters the cooling water circulation system of the printing press from the second water supply port through the variable frequency circulation pump, so that the water pressure returns to the set value range.