Coating control method, apparatus, system, device, medium, and program product

Abstract

The application provides a coating control method, device, system, equipment, medium and program product, relates to the battery coating technical field, and the method comprises the following steps: adjusting reference threshold value based on the relationship between the current operation parameter of an oven and the reference threshold value; obtaining a target threshold value for characterizing that the oven is in a balanced state according to the fact that the current opening degree of all air valves of the oven is less than the reference threshold value, and the target threshold value comprises a target opening degree of the oven air valve; adjusting the air supply amount and the exhaust amount of the oven according to the comparison result between the target opening degree and the current opening degree of the oven air valve, until the solvent concentration and the negative pressure in the oven are in a set range. The application embodiment can solve the problem that the energy consumption of the existing coating control system is high.

Description

Technical Field

[0001] This application relates to the field of battery coating technology, and in particular to a coating control method, apparatus, system, equipment, medium, and program product. Background Technology

[0002] Lithium-ion battery electrodes consist of two parts: a substrate (current collector) and a coating. The coating is formed by mixing lithium-ion active materials, conductive agents, binders, and other materials to form a uniform slurry, which is then coated onto the current collector. During the coating and drying process, the solvent contained in the coating will evaporate in the oven. Clean air needs to be introduced through a fresh air system to dilute the concentration, and the solvent-containing gas needs to be discharged through an exhaust system to maintain a safe negative pressure.

[0003] In related technologies, the total air volume is controlled by setting a fixed threshold for the opening of the air valve. However, this fixed threshold relies on manual setting based on experience, which is time-consuming. Furthermore, the coating and drying process is dynamic, and fluctuations in the operating conditions can easily trigger the air valve's frequency increase condition. However, for safety reasons, the air valve's frequency decrease condition is quite strict. This results in the system being locked in a high air frequency operating state for a long time, leading to persistently high energy consumption for both fresh air and exhaust air, triggering a vicious cycle of energy waste. In other words, existing coating control solutions are highly dependent on human skills, which restricts the level of intelligent and energy-efficient production.

[0004] It should be noted that the above statements are only used to provide background information related to this application and do not necessarily constitute prior art. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a coating control method, apparatus, system, electronic device, storage medium and program product, which can specifically solve the problem of high energy consumption in existing coating control systems.

[0006] Based on the above objectives, in a first aspect, this application proposes a coating control method, comprising: adjusting the reference threshold based on the relationship between the current operating parameters of the oven and the reference threshold to obtain a target threshold characterizing that the oven is in a balanced state, the target threshold including a target opening degree of the oven's air valves; the current operating parameters of the oven including the current opening degree of the air valves, the target opening degree being obtained based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold; and adjusting the air supply volume and exhaust volume of the oven based on the comparison result between the target opening degree and the current opening degree of the oven's air valves until the solvent concentration and negative pressure in the oven are within a set range.

[0007] The above embodiments provide a coating control method. Based on the relationship between the current operating parameters of the oven and a reference threshold, the reference threshold is adjusted to obtain a target threshold representing the oven's equilibrium state. This enables automatic and intelligent optimization of the threshold setting, replacing manual assignment based on employee experience. Then, based on the comparison between the target opening and the current opening of the oven's air valve, the oven's supply and exhaust air volumes are adjusted until the solvent concentration and negative pressure within the oven are within the set range. This achieves automated closed-loop control of the oven's ventilation system. The intelligently optimized threshold combined with closed-loop control accurately maintains the system at the optimal equilibrium point, thereby avoiding a vicious cycle of continuously increasing fresh air / exhaust air frequency, ultimately achieving energy-saving, safe, and stable results.

[0008] In some embodiments, the current operating parameters of the oven include the current opening degree of the air valves. Adjusting the reference threshold based on the relationship between the oven's current operating parameters and a reference threshold to obtain a target threshold representing that the oven is in a balanced state includes: using an initial threshold as the starting point of the reference threshold, and gradually increasing or decreasing the initial threshold by a preset step size; wherein the initial threshold is determined based on the maximum opening value of the air valves; and determining the reference threshold as the target threshold based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold.

[0009] The above embodiment starts with an initial threshold and continuously optimizes the reference threshold automatically. By adjusting the step size and determining that the opening of all air valves is less than the threshold, the target threshold is the critical point at which the system operates stably in a balanced state without triggering an abnormal increase in wind frequency. Replacing manual assignment with the target threshold obtained by the automatic optimization method can reduce system energy consumption.

[0010] In some embodiments, the step of gradually increasing or decreasing the initial threshold with a preset step size, using an initial threshold as the starting point of the reference threshold, includes: decreasing the initial threshold by a first preset step size to obtain a first threshold; increasing the first threshold by a second preset step size based on the existence of air valves in the oven with a current opening greater than the first threshold to obtain a second threshold; increasing or decreasing the second threshold by a third preset step size based on the relationship between the current opening of all air valves and the second threshold, until the current opening of all air valves in the oven is less than the reference threshold; wherein the first preset step size, the second preset step size, and the third preset step size decrease sequentially.

[0011] The above embodiment first uses a large step size to quickly approach the target threshold region, narrowing the search range; then, a medium step size is used for callback to prevent overshoot; finally, a small step size is used to perform a fine search in the target region, accurately locking in the optimal target threshold. This efficient threshold optimization logic replaces manual trial and error, significantly shortening the adjustment time and achieving high accuracy.

[0012] In some embodiments, the current operating parameters of the oven include the current air frequency of the air valve. The step of adjusting the reference threshold based on the relationship between the current operating parameters of the oven and the reference threshold to obtain a target threshold representing that the oven is in a balanced state further includes: determining the current reference threshold as the target threshold based on the fact that the current air frequency of the air valve is equal to the preset lower limit value of the air valve.

[0013] The above embodiments use the preset lower limit value of the air valve as a safety boundary for threshold adjustment, which can improve the feasibility of the target threshold, help improve the stability and safety of the system, and make the system operate above the safe lower limit of the wind frequency.

[0014] In some embodiments, the oven air valve includes a fresh air valve. Adjusting the air supply and exhaust volume of the oven according to a comparison between the target opening and the current opening of the oven air valve includes: increasing the opening of at least one fresh air valve based on the solvent concentration in the oven being greater than or equal to a preset concentration value; and increasing the fresh air frequency based on the presence of a fresh air valve in the oven whose current opening is greater than the sum of the target opening and a preset adjustment amount.

[0015] The above embodiment first adopts a low-energy-consumption fresh air valve adjustment method, and then adjusts the fresh air frequency according to the relationship between the current opening degree of the fresh air valve, the target opening degree and the preset adjustment amount. This can reduce the frequent increase and decrease of the air frequency and enhance the stability of the system.

[0016] In some embodiments, adjusting the supply and exhaust air volume of the oven based on a comparison between the target opening and the current opening of the oven air valves further includes: reducing the opening of at least one fresh air valve based on the solvent concentration in the oven being less than a preset concentration value; and reducing the fresh air frequency based on the current opening of all fresh air valves in the oven being less than the target opening.

[0017] The above embodiments first adopt a low-energy-consumption fresh air valve adjustment method, and then reduce the fresh air frequency according to the relationship between the current opening degree and the target opening degree of the fresh air valve. This breaks the vicious cycle of the air frequency only increasing and not decreasing in the existing technology, and can reduce system power consumption.

[0018] In some embodiments, the oven air valve includes an exhaust air valve, and the coating system includes multiple interconnected ovens. Adjusting the air supply and exhaust volume of the ovens based on a comparison between the target opening and the current opening of the oven air valves includes: increasing the opening of at least one exhaust air valve in the oven based on a negative pressure value greater than or equal to a preset pressure; and increasing the exhaust air frequency based on the current opening of the exhaust air valves in a first target number of ovens being greater than the sum of the target opening and a preset adjustment amount.

[0019] The above embodiments increase the air frequency by adjusting the opening of the exhaust valve of a single oven and the relationship between the opening of the exhaust valves of multiple ovens and the air frequency. This can not only respond quickly to the influence of negative pressure, but also maintain overall stability and high efficiency and energy saving.

[0020] In some embodiments, adjusting the air supply and exhaust volume of the oven based on a comparison between the target opening and the current opening of the oven air valve further includes: reducing the opening of at least one exhaust air valve in the oven based on the negative pressure value in any oven being less than a preset pressure; and reducing the exhaust air frequency based on the current opening of the exhaust air valves in a second target number of ovens being less than the target opening.

[0021] The above embodiments reduce the air frequency by adjusting the opening of the exhaust valve of a single oven and the relationship between the opening of the exhaust valves of multiple ovens and the air frequency. This enables closed-loop regulation of the exhaust system, which can quickly respond to the influence of negative pressure while maintaining overall stability and high energy efficiency.

[0022] Secondly, a coating control device is also provided, comprising: a threshold adjustment module, used to adjust the reference threshold based on the relationship between the current operating parameters of the oven and the reference threshold to obtain a target threshold characterizing that the oven is in a balanced state, the target threshold including the target opening degree of the oven's air valves; the current operating parameters of the oven including the current opening degree of the air valves, the target opening degree being obtained based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold; and a control module, used to adjust the air supply volume and exhaust volume of the oven based on the comparison result between the target opening degree and the current opening degree of the oven's air valves, until the solvent concentration and negative pressure in the oven are within a set range.

[0023] Thirdly, a coating control system is also provided, including the coating control device described in the second aspect, as well as an oven, a fresh air system, and an exhaust system; the fresh air system includes a fresh air valve disposed at the fresh air inlet of the oven; the exhaust system includes an exhaust valve disposed at the exhaust outlet of the oven; the coating control device is used to control the fresh air valve according to the solvent concentration and target threshold in the oven, and to control the exhaust valve according to the negative pressure value and target threshold in the oven, so as to adjust the air supply and exhaust volume of the oven until the solvent concentration and negative pressure in the oven are within a set range.

[0024] Fourthly, an electronic device is also provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement the method as described in any of the first aspects.

[0025] Fifthly, a computer-readable storage medium is also provided, on which a computer program is stored, the program being executed by a processor to implement the method described in any one of the first aspects.

[0026] In a sixth aspect, a computer program product is also provided, comprising a computer program that is executed by a processor to implement the method described in the first aspect.

[0027] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0028] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application. Furthermore, the same reference numerals denote the same parts throughout all the drawings.

[0029] Figure 1 This invention provides a flowchart illustrating the steps of a coating control method according to an embodiment of the present application.

[0030] Figure 2 This diagram illustrates another step of the coating control method provided in an embodiment of this application.

[0031] Figure 3 This diagram illustrates another step of the coating control method provided in an embodiment of this application.

[0032] Figure 4 The flowchart shows the optimization steps of the fresh air valve target threshold in the coating control method provided in this application;

[0033] Figure 5 This paper shows a flowchart of the steps in the coating control method provided by this application, which incorporates a fresh air conditioning logic.

[0034] Figure 6 This paper shows a flowchart of the steps in the coating control method provided in this application, specifically the exhaust adjustment logic.

[0035] Figure 7 This application provides a schematic diagram of the coating control device.

[0036] Figure 8 This illustration shows a schematic diagram of the structure of an electronic device according to an embodiment of this application;

[0037] Figure 9A schematic diagram of a storage medium provided in one embodiment of this application is shown. Detailed Implementation

[0038] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Lithium-ion battery electrodes consist of two parts: a substrate (current collector) and a coating. The coating is formed by mixing lithium-ion active materials, conductive agents, binders, and other materials to form a uniform slurry, which is then coated onto the current collector. During the coating and drying process, the solvent contained in the coating will evaporate in the oven. Clean air needs to be introduced through a fresh air system to dilute the concentration, and the solvent-containing gas needs to be discharged through an exhaust system to maintain a safe negative pressure.

[0045] In related technologies, a fixed threshold for the opening of air valves is set to regulate the total air volume. However, this fixed threshold relies on manual, experience-based setting, which is time-consuming. Furthermore, the coating and drying process is dynamic; if the threshold for the opening of air valves is not set appropriately, fluctuations in the operating conditions can easily trigger the air valve frequency increase condition. For example, regarding changes in the fresh air frequency: an increase in the cathodic solvent concentration leads to an increase in the opening of the fresh air valve; when the opening of the three fresh air valves exceeds the set threshold, it leads to an increase in the total fresh air valve opening; an increase in the total fresh air valve opening will continuously increase the fresh air supply, causing a decrease in the cathodic solvent concentration; a decrease in the cathodic solvent concentration will cause the fresh air valve opening to decrease further; and the fresh air... Once the air damper reaches a steady state, it will not continue to decrease. However, for safety reasons, the frequency reduction condition of the damper is relatively strict. At this time, not all fresh air dampers decrease to the set fresh air threshold, so the fresh air frequency reduction logic will not be triggered. The fresh air frequency continues to increase. The continuous increase in fresh air frequency leads to a continuous increase in the pressure difference inside the coating oven, which causes the exhaust damper to enlarge. When the opening of the 3 exhaust dampers exceeds the threshold, it will cause the exhaust frequency to increase. At this time, the fresh air and exhaust frequencies increase simultaneously and continuously. This causes the system to be locked in a high frequency operation state for a long time, resulting in the continuous high energy consumption of fresh air and exhaust, triggering a vicious cycle of energy waste.

[0046] To address the aforementioned issues, this application provides a coating control method. Based on the relationship between the current operating parameters of the oven and a reference threshold, the reference threshold is adjusted. When the current opening degree of all air valves in the oven is less than the reference threshold, a target threshold representing the oven's equilibrium state is obtained. This method enables automatic and intelligent optimization of the threshold setting, replacing manual assignment based on employee experience. Furthermore, based on the comparison between the target opening degree and the current opening degree of the oven's air valves, the oven's air supply and exhaust volumes are adjusted until the solvent concentration and negative pressure within the oven are within a set range. This achieves automated closed-loop control of the oven's ventilation system. The intelligently optimized threshold combined with closed-loop control accurately maintains the system at its optimal equilibrium point, thereby avoiding a vicious cycle of continuously increasing fresh air / exhaust air frequency, ultimately achieving energy-saving, safe, and stable results.

[0047] This application embodiment can be applied to battery coating scenarios, specifically to the drying scenario within battery coating. The drying process includes the following: a main fresh air fan provides clean fresh air to the coating machine. The amount of fresh air supplied to each drying oven is distributed according to the opening of the fresh air valve in each oven. After being mixed with the hot air inside the oven by a circulating fan, the air is heated together. The heated hot air passes through a filter to become clean hot air. Finally, the hot air is rationally distributed through the air inlet hull and blown onto both sides of the electrode sheet for heating and drying. The cathode solvent evaporates with the hot air, and a portion of the hot air carrying the cathode solvent enters the circulating fan to continue participating in the heating and drying process. Part of the air enters the main exhaust duct through the return air nozzle. The negative pressure of the return air nozzle can be adjusted. The cathode solvent probe monitors the NMP (N-methylpyrrolidone) concentration in the hot air of the oven at the exhaust valve. The main exhaust fan recycles the cathode solvent hot air carried in the main exhaust duct through the cathode solvent condensation and recovery system. 5% of the air volume is discharged through the rotor to ensure that the entire oven is under negative pressure. The return air nozzle of the return air system draws the cathode solvent gas inside the oven and discharges it to the circulation system. After passing through the filtration system, the circulation system leaves clean air without cathode solvent gas, which is then delivered to the oven through the upper and lower air nozzles inside the oven.

[0048] In this process, the opening degree of the fresh air valve, the fresh air frequency, the opening degree of the exhaust valve, and the exhaust valve are crucial to the pressure and NMP concentration in the oven. The coating control method provided in this application embodiment can avoid the vicious cycle of continuous increase in fresh air / exhaust air frequency in the above drying scenario, and ultimately achieve energy saving, safety and stability.

[0049] Figure 1 A flowchart illustrating the steps of the coating control method provided in an embodiment of this application is shown. Figure 1 As shown in the embodiments of this application, the coating control method includes S101~S102:

[0050] S101. Based on the relationship between the current operating parameters of the oven and the reference threshold, adjust the reference threshold to obtain the target threshold that represents the oven being in a balanced state.

[0051] S102. Based on the comparison between the target opening degree and the current opening degree of the oven air valve, adjust the air supply and exhaust volume of the oven until the solvent concentration and negative pressure inside the oven are within the set range.

[0052] The execution subject of this application embodiment can be an electronic device capable of performing a coating control method, and the electronic device may include, but is not limited to, a terminal or a server.

[0053] In this embodiment, the current operating parameters of the oven include parameters such as the current opening degree of the air valves, solvent concentration, oven negative pressure, and air frequency. The current opening degree of the air valves represents the percentage of each fresh air / exhaust air valve that is open (e.g., 50% corresponds to a valve opening degree of 50%), which reflects the real-time ventilation requirements. The solvent concentration is, for example, the content of gaseous NMP inside the oven. The oven negative pressure represents the pressure difference between the inside of the oven and the external environment. The air frequency represents the operating frequency of the fresh air fan and the exhaust fan, and the air frequency determines the total supply and exhaust air volume.

[0054] The reference threshold changes in real time as the drying system operates, representing a temporary value in this embodiment during the determination of the target threshold. When this reference threshold allows the oven to maintain a balanced state, it becomes the target threshold. The target threshold includes the target opening degree of the oven's air valves. The target threshold is obtained by continuously adjusting the reference threshold until the current opening degree of all oven air valves is less than the reference threshold. The target opening degree is the optimal air valve opening setting value that allows the oven to maintain a balanced state. Under this target threshold, the system can stabilize the solvent concentration and negative pressure within the process requirements range with minimal energy consumption.

[0055] After obtaining the target threshold, it is characterized that the oven system can control each air valve under the current operating conditions with the target threshold so that the oven is in a balanced state. Then, based on the comparison between the target opening degree and the current opening degree of the oven air valve, closed-loop control is performed to adjust the air supply and exhaust volume of the oven until the solvent concentration and negative pressure in the oven are within the set range.

[0056] The above embodiments provide a coating control method. Based on the relationship between the current operating parameters of the oven and a reference threshold, the reference threshold is adjusted to obtain a target threshold representing the oven's equilibrium state. This enables automatic and intelligent optimization of the threshold setting, replacing manual assignment based on employee experience. Then, based on the comparison between the target opening and the current opening of the oven's air valve, the oven's supply and exhaust air volumes are adjusted until the solvent concentration and negative pressure within the oven are within the set range. This achieves automated closed-loop control of the oven's ventilation system. The intelligently optimized threshold combined with closed-loop control accurately maintains the system at the optimal equilibrium point, thereby avoiding a vicious cycle of continuously increasing fresh air / exhaust air frequency, ultimately achieving energy-saving, safe, and stable results.

[0057] Figure 2 This diagram illustrates another step of the coating control method provided in an embodiment of this application. Figure 2 As shown in the embodiments of this application, the current operating parameters of the oven include the current opening degree of the air valve. Based on the relationship between the current operating parameters of the oven and a reference threshold, the reference threshold is adjusted to obtain a target threshold representing that the oven is in a balanced state, including S201~S202:

[0058] S201. Using the initial threshold as the starting point of the reference threshold, the initial threshold is gradually increased or decreased with a preset step size; wherein, the initial threshold is determined based on the maximum opening value of the damper.

[0059] S202. Based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold, the reference threshold is determined as the target threshold.

[0060] In this embodiment, the initial threshold is used as the starting point of the reference threshold. The initial threshold is determined based on the maximum opening value of the damper, which allows the reference threshold to start searching from a sufficiently large value, thus covering the optimal solution of the reference threshold.

[0061] In one example, the initial threshold could be "maximum valve opening + 1". For instance, if the maximum allowable fresh air valve opening within the system's safety range is 50, then the initial threshold could be 51. This would allow the initial threshold to be greater than the current opening of all valves. Optimization can begin with the most lenient condition, gradually increasing or decreasing the initial threshold with a preset step size.

[0062] In this embodiment, the preset step size represents the fixed numerical increment that is increased or decreased each time the reference threshold is adjusted. For example, preset step sizes include -4, +2, -1, +1, etc.

[0063] This embodiment uses an initial threshold as the starting point for the reference threshold. Each step, gradually increasing or decreasing the initial threshold with a preset step size, generates a new reference threshold. After each threshold adjustment, it is determined whether the current opening degree of all dampers is less than the current reference threshold. If not, it indicates that some damper opening degrees are greater than or equal to the reference threshold, meaning the currently set reference threshold is too strict, and the system requires a larger air volume (higher air frequency) to meet the demand. Therefore, the reference threshold can be increased to relax the control conditions. If yes, that is, all damper opening degrees are less than the reference threshold, it means that under the current ventilation volume, the needs of all dampers are met, and there is still a margin. This means that the system has the potential to operate stably under stricter control conditions (i.e., a lower threshold), thus providing room for reducing air frequency and saving energy. Therefore, the reference threshold can be decreased to continue searching for a better, more energy-efficient balance.

[0064] By continuously adjusting the reference threshold, when the current opening degree of all air valves is less than the current reference threshold, the search for the target threshold stops, and the current reference threshold is locked as the target threshold. This target threshold meets the process and safety requirements and is located at a low-energy consumption operating point.

[0065] The above embodiment starts with an initial threshold and continuously optimizes the reference threshold automatically. By adjusting the step size and determining that the opening of all air valves is less than the threshold, the target threshold is the critical point at which the system operates stably in a balanced state without triggering an abnormal increase in wind frequency. Replacing manual assignment with the target threshold obtained by the automatic optimization method can reduce system energy consumption.

[0066] Figure 3 This diagram illustrates another step in the coating control method provided in an embodiment of this application. Figure 3 As shown, in the embodiments of this application, an initial threshold is used as the starting point of a reference threshold, and the initial threshold is gradually increased or decreased with a preset step size, including S301~S303:

[0067] S301. Reduce the initial threshold by a first preset step size to obtain the first threshold;

[0068] S302. Based on the fact that there is an air valve in the oven with a current opening degree greater than the first threshold, the first threshold is increased by a second preset step to obtain the second threshold.

[0069] S303. Based on the relationship between the current opening degree of all air valves and the second threshold, increase or decrease the second threshold by a third preset step size until the current opening degree of all air valves in the oven is less than the reference threshold.

[0070] In this embodiment, the first preset step size, the second preset step size, and the third preset step size decrease sequentially. First, a large first preset step size is used for coarse adjustment, then a second preset step size is used for backtracking, and finally a third preset step size is used for fine-tuning. This combination of rapid coarse adjustment and fine-tuning achieves high efficiency and optimization in target threshold finding, improving search efficiency.

[0071] In one example, taking an initial threshold of 51, a first preset step size of 4, a second preset step size of 2, and a third preset step size of 1 as an example, the initial threshold is decreased by 4 to obtain a first threshold of 47. Based on the existence of air valves with a current opening greater than 47 in the oven, the first threshold is increased by 2 to obtain a second threshold of 49. Based on the existence of air valves with a current opening greater than 49 in the oven, the second threshold is increased by 1 to obtain a third threshold of 50. The above steps are repeated until the current opening of all air valves is less than the reference threshold. Based on the fact that the current opening of all air valves is less than the second threshold of 49, the second threshold is decreased by 1 to obtain a fourth threshold of 48. The above steps are repeated until the current opening of all air valves is less than and close to the reference threshold.

[0072] The above embodiment first uses a large step size to quickly approach the target threshold region, narrowing the search range; then, a medium step size is used for callback to prevent overshoot; finally, a small step size is used to perform a fine search in the target region, accurately locking in the optimal target threshold. This efficient threshold optimization logic replaces manual trial and error, significantly shortening the adjustment time and achieving high accuracy.

[0073] In the embodiments of this application, the current operating parameters of the oven include the current air frequency of the air valve. Based on the relationship between the current operating parameters of the oven and the reference threshold, the reference threshold is adjusted to obtain the target threshold representing that the oven is in a balanced state. The method also includes: determining the current reference threshold as the target threshold based on the fact that the current air frequency of the air valve is equal to the preset lower limit value of the air valve.

[0074] In one example, the current air frequency of the damper refers to the current operating frequency of the fresh air fan or exhaust fan. The air frequency determines the fan speed, which in turn determines the total supply or exhaust air volume. The preset lower limit of the damper is a pre-set minimum frequency at which the fan can operate safely and stably. The preset lower limit of the damper can be set according to the physical characteristics of the fan itself and the minimum ventilation requirements of the process (such as ensuring the most basic safe air exchange rate).

[0075] During the adjustment of the damper opening, the damper opening affects the airflow frequency. Therefore, this embodiment continuously monitors the current airflow frequency of the damper. When the current airflow frequency equals the preset lower limit of the damper, in order to ensure the safety of the system, the current reference threshold is determined as the target threshold. This ensures that the optimization process of the target threshold is always carried out within safe physical constraints.

[0076] The above embodiments use the preset lower limit value of the air valve as a safety boundary for threshold adjustment, which can improve the feasibility of the target threshold, help improve the stability and safety of the system, and make the system operate above the safe lower limit of the wind frequency.

[0077] In the embodiments of this application, the oven air valve includes a fresh air valve. The air supply and exhaust volume of the oven are adjusted according to the comparison result between the target opening degree and the current opening degree of the oven air valve. This includes: increasing the opening degree of at least one fresh air valve according to the solvent concentration in the oven being greater than or equal to a preset concentration value; and increasing the fresh air frequency according to the presence of a fresh air valve in the oven whose current opening degree is greater than the sum of the target opening degree and the preset adjustment amount.

[0078] In this embodiment, the preset concentration value is a pre-set safety threshold indicating that the solvent (NMP) concentration in the oven has reached a level requiring intervention. When the concentration exceeds this preset value, it signifies a safety risk. Increasing the opening of at least one fresh air valve can increase the airflow within the oven, thereby reducing the solvent concentration. Increasing the opening of at least one fresh air valve can be done by adding one or more valves.

[0079] In this embodiment, the preset adjustment amount refers to the buffer value added to the target opening. "Target opening + preset adjustment amount" is the boundary condition for wind frequency operation, which can prevent frequent increases and decreases in wind frequency due to normal fluctuations, thereby enhancing the stability of the system.

[0080] When there is a fresh air valve in the oven whose current opening is greater than the sum of the target opening and the preset adjustment amount, it indicates that the fresh air demand in the oven is large. Increasing the fresh air frequency at this time can increase the air supply of each fresh air valve, reduce the solvent concentration in the oven, and achieve closed-loop regulation of the valves and the frequency.

[0081] The above embodiment first adopts a low-energy-consumption fresh air valve adjustment method, and then adjusts the fresh air frequency according to the relationship between the current opening degree of the fresh air valve, the target opening degree and the preset adjustment amount. This can reduce the frequent increase and decrease of the air frequency and enhance the stability of the system.

[0082] In the embodiments of this application, adjusting the air supply and exhaust volume of the oven based on the comparison result between the target opening and the current opening of the oven air valves further includes: reducing the opening of at least one fresh air valve based on the solvent concentration in the oven being less than a preset concentration value; and reducing the fresh air frequency based on the current opening of all fresh air valves in the oven being less than the target opening.

[0083] When the solvent concentration in the oven is lower than the preset value, it means that the solvent concentration in the oven has reached a safe range. At this time, reducing the opening of at least one fresh air valve helps to trigger the air frequency reduction logic and reduce energy consumption. When the current opening of all fresh air valves in the oven is less than the target opening, it means that the fresh air demand in the oven is low. At this time, even if the fresh air frequency is reduced, it will not affect the stability and safety of the system, and can also reduce power consumption.

[0084] The above embodiments first adopt a low-energy-consumption fresh air valve adjustment method, and then reduce the fresh air frequency according to the relationship between the current opening degree and the target opening degree of the fresh air valve. This breaks the vicious cycle of the air frequency only increasing and not decreasing in the existing technology, and can reduce system power consumption.

[0085] In the embodiments of this application, the oven air valve includes an exhaust air valve, and the coating system includes multiple interconnected ovens. The air supply and exhaust volume of the oven are adjusted based on a comparison between the target opening and the current opening of the oven air valve, including: increasing the opening of at least one exhaust air valve in the oven based on a negative pressure value greater than or equal to a preset pressure; and increasing the exhaust air frequency based on the current opening of the exhaust air valves in a first target number of ovens being greater than the sum of the target opening and a preset adjustment amount.

[0086] In this embodiment, the preset pressure refers to the target negative pressure value that needs to be maintained inside the oven. This preset pressure can maintain the safe operation of the system.

[0087] In one example, the drying system may include one or more ovens, which are interconnected. Each oven is equipped with a fresh air system and an exhaust system. If the negative pressure value in any oven is greater than or equal to a preset pressure, it indicates that the gas concentration and pressure in that oven are too high. In this case, increasing the opening of at least one exhaust valve in that oven can reduce the negative pressure value in that oven.

[0088] In one example, the first target quantity can be determined based on the system's safety accuracy and the total number of ovens. The first target quantity can be 2, 3, or the total number of ovens.

[0089] If the current opening degree of the exhaust air valves in the first target number of ovens is greater than the sum of the target opening degree and the preset adjustment amount, it indicates that adjusting only the exhaust air valve in a single oven cannot quickly solve the problem of high negative pressure. Therefore, the exhaust air frequency is increased to quickly reduce the total negative pressure value in multiple ovens as a whole.

[0090] The above embodiments increase the air frequency by adjusting the opening of the exhaust valve of a single oven and the relationship between the opening of the exhaust valves of multiple ovens and the air frequency. This can not only respond quickly to the influence of negative pressure, but also maintain overall stability and high efficiency and energy saving.

[0091] In the embodiments of this application, adjusting the air supply and exhaust volume of the oven based on the comparison result between the target opening and the current opening of the oven air valve further includes: reducing the opening of at least one exhaust air valve in the oven based on the negative pressure value in any oven being less than the preset pressure; and reducing the exhaust air frequency based on the current opening of the exhaust air valves in a second target number of ovens being less than the target opening.

[0092] In this embodiment, if the negative pressure value in any oven is less than the preset pressure, it will affect the drying efficiency. At this time, reducing the opening of at least one exhaust valve in the oven can regulate the negative pressure in the oven.

[0093] Among them, there is a dynamic balance relationship between negative pressure, exhaust valve opening and air frequency. When the exhaust air volume decreases, the negative pressure will increase. However, in order to prevent the air valve from continuously decreasing, the current opening of the exhaust valve is dynamically monitored. When the current opening of the exhaust valve in the second target number of ovens is less than the target opening, it indicates that the exhaust volume demand in the current oven system is small. Therefore, the exhaust air frequency is reduced, which can reduce the energy consumption of the exhaust system.

[0094] In this embodiment, the second target quantity can be determined based on the system safety accuracy and the total number of ovens. For example, the second target quantity is the total number of oven sections minus the fault tolerance, and the fault tolerance is, for example, 2 or 3.

[0095] The above embodiments reduce the air frequency by adjusting the opening of the exhaust valve of a single oven and the relationship between the opening of the exhaust valves of multiple ovens and the air frequency. This enables closed-loop regulation of the exhaust system, which can quickly respond to the influence of negative pressure while maintaining overall stability and high energy efficiency.

[0096] The coating control method described above will be illustrated below with an example of its application in a specific embodiment.

[0097] Figure 4 This diagram illustrates the optimization steps for the target threshold of the fresh air valve in the coating control method provided in this application. Figure 4 As shown, the intelligent adjustment steps for the fresh air valve threshold include:

[0098] Step 1: Turn on all systems of the cathode coating oven, start adjusting the fresh air frequency, and turn on energy saving;

[0099] Step 2: Set the initial threshold value to "maximum opening value of fresh air valve + 1";

[0100] Step 3: The coating oven system is automatically calibrated;

[0101] Step 4: Assign the new threshold value to "threshold - 4";

[0102] Step 5: The system automatically determines whether the opening degree of all fresh air valves is less than the threshold or whether the fresh air frequency has reached the lower limit.

[0103] Step 6: If the result of step 5 is yes, assign "threshold - 4" as the new threshold and jump to step 5;

[0104] Step 7: If the result of step 5 is negative, assign "threshold + 2" as the new threshold, continue to determine whether the opening of all air valves is less than the threshold or the air frequency reaches the lower limit, and jump to step 8.

[0105] Step 8: If the result of step 7 is yes, assign "threshold-1" as the new threshold, and continue to determine whether the opening of all air valves is less than the threshold or the air frequency reaches the lower limit, and proceed to the next step.

[0106] Step 9: If the result of step 8 is yes, the threshold in step 8 is used as the target threshold and assigned a value, and the process ends.

[0107] Step 10: If the result of step 8 is negative, assign "threshold + 1" as the new threshold, and continue to determine whether the opening of all air valves is less than the threshold or the air frequency reaches the lower limit value, and proceed to step 10.

[0108] Step 11: If the result of step 10 is yes, assign "threshold - 1" as the new threshold directly, and the process ends; if the result of step 10 is no, assign "threshold + 1" as the new threshold directly, and the process ends.

[0109] Step 12: If the result of step 7 is negative, assign "threshold + 1" as the new threshold; continue to determine whether the opening of all air valves is less than the threshold or the air frequency reaches the lower limit, and proceed to step 12.

[0110] Step 13: If the result of step 12 is yes, assign the value directly, and the process ends.

[0111] Step 14: If the result of step 12 is negative, assign "threshold + 1" as the new threshold, and the process ends.

[0112] As described above, by dynamically adjusting the threshold and automatically finding the optimal target threshold, the range of the threshold is continuously narrowed by comparing the relationship between the valve opening and the threshold, until the oven reaches a balanced state and the optimal threshold is used instead of the manual experience value. This not only meets the requirements for safe and stable operation of the system, but also solves the problem of high energy consumption caused by the continuous increase in wind frequency.

[0113] After obtaining the target threshold for each section of the oven, this target threshold is applied to the operation of the oven. During the operation of the oven, dynamic closed-loop adjustment of the oven system is achieved based on the target threshold. The calculation process of the target threshold can be performed during the initialization of the oven system or dynamically adjusted during the operation of the oven. The above steps take the optimization of the target threshold of the fresh air system as an example. The optimization of the target threshold of the exhaust system is similar to steps 1 to 14 above, and will not be repeated here.

[0114] Figure 5 This diagram illustrates the steps of the fresh air conditioning logic in the coating control method provided in this application. Figure 5 As shown: When the cathode solvent concentration exceeds the preset concentration value, the opening of the fresh air valve increases; if the opening of any fresh air valve exceeds "target opening + 5", the total fresh air frequency + 1 is triggered; the total fresh air frequency + 1 will contribute more fresh air, causing the cathode solvent concentration in the oven to decrease; when the cathode solvent concentration is lower than the preset concentration value, the opening of the fresh air valve will decrease; and the fresh air frequency - 1 will only be triggered when the opening of all fresh air valves is less than the target opening; when the fresh air frequency - 1, the content of clean air blown into the coating oven will decrease, which will in turn lead to an increase in the cathode solvent concentration in the oven, forming a closed loop.

[0115] Figure 6 This diagram illustrates the steps of the exhaust regulation logic in the coating control method provided in this application. Figure 6As shown, when the negative pressure inside the cathode oven exceeds the preset pressure, the exhaust valve increases; when the cumulative opening of the exhaust valves for the first target number (three sections) exceeds "target opening + 5", the total exhaust frequency is increased by 1; the total fresh air frequency of 1 will discharge more gas containing cathode solvent, causing the negative pressure inside the oven to decrease; when the negative pressure is lower than the preset pressure, the exhaust valve will decrease; when the current opening of the exhaust valves in the second target number (total number of oven sections - 2) is less than the target opening, the total exhaust frequency is decreased by 1; when the exhaust frequency decreases by 1, the discharged cathode solvent gas will decrease, which will in turn cause the negative pressure inside the oven to increase, forming a closed loop.

[0116] The embodiments of this application can realize automatic and intelligent optimization setting of thresholds, replacing manual assignment that relies on employee experience; based on the target threshold, the oven ventilation system can be automatically closed-loop controlled. The intelligent optimization threshold combined with closed-loop control can accurately maintain the system at the optimal balance point, thereby avoiding the vicious cycle of continuous increase in fresh air / exhaust air frequency, and ultimately achieving energy-saving, safe and stable effects.

[0117] Figure 7 A schematic diagram of the coating control device provided in this application is shown. Figure 7 As shown, a coating control device 700 includes:

[0118] The threshold adjustment module 701 is used to adjust the reference threshold based on the relationship between the current operating parameters of the oven and the reference threshold to obtain the target threshold that represents the oven being in a balanced state. The target threshold includes the target opening degree of the oven's air valves. The current operating parameters of the oven include the current opening degree of the air valves. The target opening degree is obtained based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold.

[0119] The control module 702 is used to adjust the air supply and exhaust volume of the oven according to the comparison result between the target opening degree and the current opening degree of the oven air valve, until the solvent concentration and negative pressure in the oven are within the set range.

[0120] In one embodiment, the current operating parameters of the oven include the current opening degree of the air valves. The threshold adjustment module 701 is further configured to use an initial threshold as the starting point of the reference threshold and gradually increase or decrease the initial threshold by a preset step size. The initial threshold is determined based on the maximum opening value of the air valves. The reference threshold is determined as the target threshold based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold.

[0121] In one embodiment, the threshold adjustment module 701 is further configured to decrease the initial threshold by a first preset step to obtain a first threshold; increase the first threshold by a second preset step to obtain a second threshold based on the existence of air valves in the oven with a current opening greater than the first threshold; and increase or decrease the second threshold by a third preset step based on the relationship between the current opening of all air valves and the second threshold, until the current opening of all air valves in the oven is less than the reference threshold; wherein the first preset step, the second preset step, and the third preset step decrease sequentially.

[0122] In one embodiment, the current operating parameters of the oven include the current air frequency of the air valve, and the threshold adjustment module 701 is further configured to determine the current reference threshold as the target threshold based on the fact that the current air frequency of the air valve is equal to the preset lower limit value of the air valve.

[0123] In one embodiment, the oven air valve includes a fresh air valve, and the control module 702 is further configured to increase the opening of at least one fresh air valve according to the solvent concentration in the oven being greater than or equal to a preset concentration value; and to increase the fresh air frequency according to the presence of a fresh air valve in the oven whose current opening is greater than the sum of the target opening and the preset adjustment amount.

[0124] In one embodiment, the control module 702 is further configured to reduce the opening of at least one fresh air valve based on the solvent concentration in the oven being less than a preset concentration value; and to reduce the fresh air frequency based on the current opening of all fresh air valves in the oven being less than the target opening.

[0125] In one embodiment, the oven air valve includes an exhaust air valve, the coating system includes multiple interconnected ovens, and the control module 702 is further configured to increase the opening of at least one exhaust air valve in the oven according to the negative pressure value in any oven being greater than or equal to a preset pressure; and to increase the exhaust air frequency according to the current opening of the exhaust air valves in a first target number of ovens being greater than the sum of the target opening and the preset adjustment amount.

[0126] In one embodiment, the control module 702 is further configured to reduce the opening of at least one exhaust valve in the oven according to the negative pressure value in any oven being less than the preset pressure; and to reduce the exhaust frequency according to the current opening of the exhaust valves in a second target number of ovens being less than the target opening.

[0127] The coating control device and coating control method provided in the above embodiments of this application are based on the same application concept and have the same beneficial effects as the methods adopted, run or implemented by the application stored therein.

[0128] This embodiment provides a coating control system, including the coating control device described in the above embodiment, as well as an oven, a fresh air system, and an exhaust system. The fresh air system includes a fresh air valve disposed at the fresh air inlet of the oven. The exhaust system includes an exhaust valve disposed at the exhaust outlet of the oven. The coating control device controls the fresh air valve based on the solvent concentration and a target threshold within the oven, and controls the exhaust valve based on the negative pressure value and the target threshold within the oven, to adjust the air supply and exhaust volume of the oven until the solvent concentration and negative pressure within the oven are within a set range. In one example, the coating control device is, for example, a controller.

[0129] The coating control system provided in the above embodiments of this application and the coating control method provided in the embodiments of this application are based on the same application concept and have the same beneficial effects as the methods adopted, run or implemented by the application stored therein.

[0130] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0131] This application also provides an electronic device corresponding to the coating control method provided in the foregoing embodiments, for executing the coating control method described above.

[0132] Please refer to Figure 8 This illustrates a schematic diagram of an electronic device provided by some embodiments of this application. For example... Figure 8 As shown, the electronic device 20 includes: a processor 200, a memory 201, a bus 202, and a communication interface 203. The processor 200, the communication interface 203, and the memory 201 are connected via the bus 202. The memory 201 stores a computer program that can run on the processor 200. When the processor 200 runs the computer program, it executes the method provided in any of the foregoing embodiments of this application.

[0133] The memory 201 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 203 (which can be wired or wireless), such as the Internet, wide area network, local area network, or metropolitan area network.

[0134] Bus 202 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory 201 is used to store programs. After receiving an execution instruction, the processor 200 executes the program. The coating control method disclosed in any of the foregoing embodiments of this application can be applied to the processor 200, or implemented by the processor 200.

[0135] The processor 200 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 200 or by instructions in software form. The processor 200 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 201. The processor 200 reads the information in memory 201 and, in conjunction with its hardware, completes the steps of the above method.

[0136] The electronic device provided in this application embodiment and the coating control method provided in this application embodiment are based on the same application concept and have the same beneficial effects as the methods they adopt, operate or implement.

[0137] This application also provides a computer-readable storage medium corresponding to the coating control method provided in the foregoing embodiments. Please refer to... Figure 9 It shows a computer-readable storage medium 30, which may be an optical disc storing a program product, such as an operating system, application software, games, or utility software. The program product includes a computer program, which typically exists in source code or compiled binary form. When the computer program is run by a processor, it executes the coating control method provided in any of the foregoing embodiments.

[0138] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0139] The computer-readable storage medium provided in the above embodiments of this application and the coating control method provided in the embodiments of this application are based on the same application concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0140] This application also provides a computer program product corresponding to the method provided in the foregoing embodiments. The computer program product includes a computer program that is executed by a processor to implement the coating control method provided in the foregoing embodiments.

[0141] The computer program products provided in the above embodiments of this application and the methods provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the applications stored therein.

[0142] It should be noted that:

[0143] In the foregoing text, 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. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0144] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0145] The embodiments of this application have been described above with reference to the accompanying drawings. These are merely specific implementations of this application, but this application is not limited to the specific implementations described above. The specific implementations described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A coating control method, characterized in that, include: Based on the relationship between the current operating parameters of the oven and the reference threshold, the reference threshold is adjusted to obtain a target threshold representing that the oven is in a balanced state. The target threshold includes the target opening degree of the oven's air valves. The current operating parameters of the oven include the current opening degree of the air valves. The target opening degree is obtained based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold. Based on the comparison between the target opening degree and the current opening degree of the oven's air valve, adjust the air supply and exhaust volume of the oven until the solvent concentration and negative pressure inside the oven are within the set range.

2. The method according to claim 1, characterized in that, The process of adjusting the reference threshold based on the relationship between the oven's current operating parameters and a reference threshold to obtain a target threshold representing that the oven is in a balanced state includes: Using an initial threshold as the starting point of the reference threshold, the initial threshold is gradually increased or decreased with a preset step size; wherein, the initial threshold is determined based on the maximum value of the damper opening. The reference threshold is determined as the target threshold based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold.

3. The method according to claim 2, characterized in that, The step of using an initial threshold as the starting point of the reference threshold and gradually increasing or decreasing the initial threshold with a preset step size includes: The initial threshold is reduced by a first preset step size to obtain the first threshold; Based on the fact that there is an air valve in the oven with a current opening degree greater than the first threshold, the first threshold is increased by a second preset step to obtain a second threshold. Based on the relationship between the current opening degree of all air valves and the second threshold, the second threshold is increased or decreased by a third preset step size until the current opening degree of all air valves in the oven is less than the reference threshold; wherein, the first preset step size, the second preset step size, and the third preset step size decrease sequentially.

4. The method according to any one of claims 1-3, characterized in that, The current operating parameters of the oven include the current air frequency of the air valve. The step of adjusting the reference threshold based on the relationship between the current operating parameters of the oven and a reference threshold to obtain a target threshold representing that the oven is in a balanced state also includes: Based on the fact that the current air frequency of the air valve is equal to the preset lower limit value of the air valve, the current reference threshold is determined as the target threshold.

5. The method according to claim 1, characterized in that, The oven air valve includes a fresh air valve. Based on a comparison between the target opening degree and the current opening degree of the oven air valve, the supply air volume and exhaust air volume of the oven are adjusted, including: If the solvent concentration in the oven is greater than or equal to the preset concentration value, increase the opening of at least one fresh air valve; The fresh air frequency is increased based on the presence of a fresh air valve in the oven whose current opening degree is greater than the sum of the target opening degree and the preset adjustment amount.

6. The method according to claim 5, characterized in that, Based on the comparison between the target opening degree and the current opening degree of the oven air valve, the air supply and exhaust volume of the oven are adjusted, further including: If the solvent concentration in the oven is less than the preset concentration value, reduce the opening of at least one fresh air valve; The fresh air frequency is reduced if the current opening degree of all fresh air valves in the oven is less than the target opening degree.

7. The method according to claim 1, characterized in that, The oven air valve includes an exhaust air valve, and the coating system includes multiple interconnected ovens. Based on a comparison between the target opening degree and the current opening degree of the oven air valve, the air supply and exhaust volume of the oven are adjusted, including: If the negative pressure value in any oven is greater than or equal to the preset pressure, increase the opening of at least one exhaust valve in the oven. If the current opening degree of the exhaust air valves in the ovens of the first target number is greater than the sum of the target opening degree and the preset adjustment amount, the exhaust air frequency is increased.

8. The method according to claim 7, characterized in that, Based on the comparison between the target opening degree and the current opening degree of the oven air valve, the air supply and exhaust volume of the oven are adjusted, further including: If the negative pressure value in any oven is less than the preset pressure, reduce the opening of at least one exhaust valve in the oven. The exhaust frequency is reduced if the current opening degree of the exhaust valves in the ovens of the second target number is less than the target opening degree.

9. A coating control device, characterized in that, include: The threshold adjustment module is used to adjust the reference threshold based on the relationship between the current operating parameters of the oven and the reference threshold to obtain a target threshold that represents the oven being in a balanced state. The target threshold includes the target opening degree of the oven's air valves. The current operating parameters of the oven include the current opening degree of the air valves. The target opening degree is obtained based on the fact that the current opening degree of all air valves in the oven is less than the reference threshold. The control module is used to adjust the air supply and exhaust volume of the oven based on the comparison between the target opening and the current opening of the oven air valve, until the solvent concentration and negative pressure in the oven are within the set range.

10. A coating control system, characterized in that, It includes the coating control device as described in claim 9, as well as an oven, a fresh air system, and an exhaust system; The fresh air system includes a fresh air valve, which is located at the fresh air inlet of the oven. The exhaust system includes an exhaust valve, which is located at the exhaust port of the oven; The coating control device is used to control the fresh air valve according to the solvent concentration and target threshold in the oven, and to control the exhaust air valve according to the negative pressure value and target threshold in the oven, so as to adjust the air supply and exhaust volume of the oven until the solvent concentration and negative pressure in the oven are within the set range.

11. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the method as claimed in any one of claims 1-7.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by a processor to implement the method as described in any one of claims 1-7.

13. A computer program product, comprising a computer program, characterized in that, The computer program is executed by a processor to implement the method according to any one of claims 1-7.

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