A multi-point temperature control system for a varnishing machine oven

Abstract

The present application relates to the technical field of oven multi-point temperature control, and is used to solve the problem that the existing oven temperature control system is difficult to reflect the real-time heat distribution state of the multi-section inside the oven cavity, and the temperature regulation has the problems of response lag and uneven heating. Specifically, the present application is a varnishing machine oven multi-point temperature control system, which comprises a cloud server, a data acquisition module, a cloud database, an air inlet analysis module, a section heating analysis module, a circulating catalysis analysis module and a temperature control terminal. Through dynamic identification and active adjustment of the multi-section, multi-station and multi-sequential thermal behavior inside the oven cavity, the present application constructs a varnishing machine oven multi-point temperature intelligent control system, which not only meets the requirements of multi-zone, multi-section and multi-point measurement and control, and adapts to the production needs of multiple specifications and multiple oil processes, but also realizes flexible adjustment of the oven temperature in multiple sections, and through the combination of one-time catalytic temperature control, exhaust linkage and secondary catalysis, the present application ensures efficient treatment of solvents and environmental protection of emissions.

Description

Technical Field

[0001] This invention relates to the field of multi-point temperature control technology for ovens, specifically a multi-point temperature control system for enameling machine ovens. Background Technology

[0002] As the core unit for coating film curing, the enameling machine oven undertakes key heat treatment functions such as solvent evaporation, resin melting, and cross-linking curing. More specifically within the oven system, since the enameling wire has significantly different temperature sensitivity in different sections, the oven's multi-point temperature control system becomes an important component to ensure stable coating film quality, improve curing uniformity, and reduce defects. It is also a key link in controlling energy consumption, efficiency, and quality in the production process.

[0003] Currently, the temperature control methods used in traditional enameling machine ovens have significant shortcomings. They fail to reflect the real-time heat distribution within the multi-segment interior of the long, narrow oven cavity. This results in delayed temperature regulation and uneven heating, easily leading to localized overheating or incomplete curing of the enamel film, affecting the overall insulation performance and appearance quality of the enameled wire. Furthermore, most temperature control systems are manually or semi-automatically set, lacking intelligent identification and fault warning functions. Under prolonged operation or high-capacity load conditions, control deviations can easily cause quality abnormalities or even equipment damage, severely restricting production efficiency and quality consistency. Secondly, in the area of ​​cyclic catalysis, due to the large amount of organic solvent volatilization during heating, the catalytic device is not linked with the temperature control system. This causes fluctuations in catalytic efficiency due to temperature imbalances, easily leading to insufficient waste gas treatment and low heat utilization. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-point temperature control system for enameling machine ovens, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a multi-point temperature control system for an enameling machine oven, comprising a cloud server, wherein the cloud server is communicatively connected to a data acquisition module, a cloud database, an air intake analysis module, a section heating analysis module, a circulating catalytic analysis module, and a temperature control terminal;

[0006] The air intake analysis module is used to analyze the deviation of the cold air intake at the inlet of the enameling machine oven, thereby generating an air intake control command. After the air intake control operation is executed, a section heating analysis command is sent to the section heating analysis module.

[0007] The section heating analysis module is used to judge and analyze the section heating status of the enameling machine oven after receiving the section heating analysis command, thereby identifying abnormal heating sections, generating corresponding section heating control commands for the abnormal heating sections, sending them to the temperature control terminal to execute the corresponding heating control operations, and then sending a thermal cycle catalytic analysis command to the cycle catalytic analysis module.

[0008] The circulating catalytic analysis module is used to analyze the thermal circulating catalytic effect in the enameling machine oven after receiving the thermal circulating catalytic analysis command, and generate circulating air control command and secondary catalytic temperature control command accordingly, and send them to the temperature control terminal to execute the corresponding heat recovery circulation operation and secondary catalytic temperature control operation.

[0009] Preferably, the data acquisition module is used to collect the amount of cold air entering the enameling machine oven, the temperature status parameters of the heating section, the effective heating and curing parameters of the target enameled wire, and the gas temperature parameters after primary catalysis, and to send the various types of data information to the cloud database for storage.

[0010] Preferably, the cloud database is also used to store a deviation state control level judgment table, an effective heating and curing control level comparison table, and a secondary catalytic heating control level comparison table.

[0011] Preferably, the deviation of the cold air intake at the inlet of the enameling machine oven is analyzed, and the specific process includes:

[0012] During the transport of the target enameled wire, the flow meter deployed at the inlet of the enameled machine oven is used to monitor the cold air entering the oven in real time and obtain the amount of cold air entering at each monitoring period.

[0013] During the unit monitoring period, the safe upper limit of cold air entry at the inlet of the enameling machine oven during the transport of the target enameled wire is used as the cold air entry threshold.

[0014] The amount of cold air entering during each monitoring period is compared and analyzed with the cold air entry threshold. If the amount of cold air entering during the corresponding monitoring period exceeds the cold air entry threshold, the corresponding monitoring period is marked as an abnormal intrusion period. The total duration of the abnormal intrusion period is calculated, and the amount of cold air entering during the corresponding abnormal intrusion period is recorded. If the amount of cold air entering during the corresponding monitoring period does not exceed the cold air entry threshold, the corresponding monitoring period is marked as a normal intrusion period, and the total duration of the normal intrusion period is calculated.

[0015] If the total duration of the normal intrusion period exceeds the total duration of the abnormal intrusion period, a section heating analysis signal is generated and sent to the section heating analysis module; if the total duration of the normal intrusion period does not exceed the total duration of the abnormal intrusion period, an intake control command is generated and the intake control operation is executed.

[0016] Preferably, intake control operation is performed, specifically including:

[0017] After receiving the intake control command, the cold air intake amount during each abnormal intrusion period is subtracted from the cold air intake threshold to obtain the cold air intake deviation value for each abnormal intrusion period. The cold air intake deviation value for each abnormal intrusion period is then compared and matched with the deviation status control level judgment table stored in the cloud database to obtain the inlet damper adjustment level for each abnormal intrusion period. Each abnormal intrusion period corresponds to an inlet damper adjustment level, which includes a first-level inlet damper adjustment level, a second-level inlet damper adjustment level, and a third-level inlet damper adjustment level.

[0018] If the inlet damper adjustment level during the abnormal intrusion period is the first-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-1. If the inlet damper adjustment level during the abnormal intrusion period is the second-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-2. If the inlet damper adjustment level during the abnormal intrusion period is the third-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-3, and Bh-1 > Bh-2 > Bh-3 > 0.

[0019] After performing the corresponding intake control operation during each abnormal intrusion period, a section heating analysis command is generated and sent to the section heating analysis module.

[0020] Preferably, the heating status of different sections of the enameling machine oven is analyzed and judged, specifically including the following steps:

[0021] S1. After receiving the section heating analysis command, along the direction of travel of the target enameled wire, the temperature status of each heating section in the furnace is monitored in real time by the deployed temperature sensors to obtain the heating temperature value of each heating section. The initial heating temperature value of each section is set according to the historical temperature control adjustment parameters of the current target enameled wire type and recorded as the heating temperature reference value of each section. The heating section includes the inlet heating section, the evaporation heating section, the curing heating section and the outlet heating section, and each heating section contains a set of independently temperature-controlled heating tubes.

[0022] S2. Compare and analyze the heating temperature value of the corresponding heating section with the corresponding heating temperature reference value. The specific analysis process includes:

[0023] If the heating temperature value of the corresponding heating section is equal to the heating temperature reference value of the corresponding heating section, the corresponding heating section is marked as a normal heating section, and a normal heating command for the corresponding normal heating section is generated. At this time, the operation of maintaining the power of the heating tube in the current normal heating section is executed, and the heating temperature reference value of the current normal heating section is marked as the heating temperature standard value. If the heating temperature value of the corresponding heating section is not equal to the heating temperature reference value of the corresponding heating section, the corresponding heating section is marked as an abnormal heating section, and a temperature control trigger condition verification command for the corresponding abnormal heating section is generated.

[0024] S3. Based on the generated temperature control trigger condition verification command, collect the effective heating and curing parameters of the target enameled wire in the corresponding abnormal heating section. The specific collection process includes:

[0025] Collect the smooth area, bulging area, and concave area of ​​the target enameled wire within the corresponding abnormal heating section, and label them as sgh. i sgb i and sax i The three data points were correlated and, after dimensionless processing, the smoothness of the enameled wire coating surface within the corresponding abnormal heating section was analyzed to determine the smoothness coefficient of the enameled wire coating surface within the corresponding abnormal heating section. Specifically: In the formula, xgh i This represents the surface smoothness coefficient of the enameled wire in the i-th abnormal heating zone;

[0026] Collect the coating thickness values ​​before and after curing at each monitoring point of the target enameled wire within the corresponding abnormal heating section, and calibrate them as hgq. i,j and hgh i,j By calculating and analyzing the degree of change in the coating thickness of the target enameled wire within the corresponding abnormal heating section, the change value of the coating thickness of the target enameled wire within the corresponding abnormal heating section is determined. Specifically: In the formula, zbh i This represents the change in the coating thickness of the target enameled wire within the i-th abnormal heating zone, where j = 1, 2, 3, ..., n, and n represents the number of monitoring points.

[0027] Within a unit period Tz, the concentration of the paint solvent after evaporation and the concentration of the paint solvent before evaporation in the corresponding abnormal heating section are collected and denoted as czh respectively. i and czq i Based on the established data calculation model, the evaporation rate of the paint solvent in the target enameled wire within the corresponding abnormal heating section is analyzed, and the evaporation rate of the paint solvent in the target enameled wire within the corresponding abnormal heating section is determined. Specifically: In the formula, vsz iThis represents the evaporation rate of the paint solvent in the target enameled wire within the i-th abnormal heating zone;

[0028] This outputs the effective heating and curing parameters of the target enameled wire within the corresponding abnormal heating zone. The surface smoothness coefficient, film thickness variation, and solvent evaporation rate within these parameters are correlated. After dimensionless processing, the effective heating and curing degree of the target enameled wire in the corresponding abnormal heating zone is analyzed, and the effective heating and curing index for that zone is determined. Specifically, zyx i =a1×xgh i +a2×zbh i +a3×vsz i In the formula, zyx i denoted as the effective heating curing index of the i-th abnormal heating zone, where a1, a2, and a3 represent the weight values ​​of the paint film surface smoothness coefficient, the paint film thickness variation value, and the paint solvent evaporation rate, respectively, and a1, a2, and a3 are all natural numbers greater than 0.

[0029] S4. Compare and analyze the effective heating and curing index of the corresponding abnormal heating sections with the pre-set effective curing comparison threshold. The specific comparison and analysis process includes:

[0030] S41. If the effective heating and curing index of the corresponding abnormal heating section exceeds the preset effective curing comparison threshold, it indicates that the target enameled wire of the corresponding abnormal heating section is in an effective heating and curing state. The effective heating and curing command of the corresponding abnormal heating section is generated. At this time, the operation of maintaining the power of the heating tube in the current normal heating section is executed, and the heating temperature reference value of the current abnormal heating section is marked as the heating temperature standard value.

[0031] S42. If the effective heating and curing index of the corresponding abnormal heating section does not exceed the preset effective curing comparison threshold, it indicates that the heating and curing of the target enameled wire in the corresponding abnormal heating section is invalid. At this time, a section heating control command for the corresponding abnormal heating section is generated, and the corresponding heating control operation is executed. The specific heating control operation process includes:

[0032] S421. When a section heating control command for a corresponding abnormal heating section is generated, the effective heating and curing index of the corresponding abnormal heating section is subtracted from the preset effective curing comparison threshold to obtain the effective heating and curing difference value of the corresponding abnormal heating section. The specific form is: effective heating and curing difference value = effective curing comparison threshold - effective heating and curing index.

[0033] S422. Compare and analyze the effective heating and curing difference values ​​of the corresponding abnormal heating sections with the effective heating and curing control level comparison table stored in the metadata database to obtain the heating control level of the corresponding abnormal heating section. Each effective heating and curing difference value corresponds to a heating control level, including a first-level heating control level, a second-level heating control level, and a third-level heating control level.

[0034] S423. If the heating control level of the corresponding abnormal heating section is Level 1, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P1. If the heating control level of the corresponding abnormal heating section is Level 2, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P2. If the heating control level of the corresponding abnormal heating section is Level 3, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P3, and P1 > P2 > P3 > 0.

[0035] At this time, the heating temperature generated by adjusting the heating power of the heating tube in the corresponding abnormal heating section is output and marked as the standard value of the heating temperature of the corresponding abnormal heating section.

[0036] S43. The standard heating temperature values ​​of each abnormal heating section are used as the new temperature control adjustment parameters for the current target enameled wire in the corresponding abnormal heating section. The parameters are then sent to the temperature control terminal to execute the subsequent curing process of the target type enameled wire. During the execution of the new temperature control adjustment parameters, a thermal cycling catalytic analysis command is sent out.

[0037] Preferably, the thermal circulation catalytic effect within the enameling machine oven is analyzed, and the specific analysis process includes:

[0038] After receiving the thermal cycle catalytic analysis command, the temperature of the gas after catalysis in the main catalytic chamber of the enameling machine oven is monitored in real time by a temperature sensor to obtain the temperature value of the gas after primary catalysis at each monitoring time point.

[0039] Based on the ideal temperature for the catalytic reaction of pollutants, a pre-set threshold for the gas temperature after primary catalysis is established. The gas temperature values ​​after primary catalysis at each monitoring time point are compared and analyzed with the threshold. If the gas temperature value after primary catalysis at the corresponding monitoring time point is equal to the threshold, the corresponding monitoring time point is marked as the ideal temperature catalytic time point, and the number of ideal temperature catalytic time points is counted. If the gas temperature value after primary catalysis at the corresponding monitoring time point is not equal to the threshold, the corresponding monitoring time point is marked as the abnormal temperature catalytic time point, and the number of abnormal temperature catalytic time points is counted.

[0040] If the number of catalytic time points at the ideal temperature exceeds the number of catalytic time points at the abnormal temperature, a heat recovery cycle command is generated and the heat recovery cycle operation is executed. If the number of catalytic time points at the ideal temperature does not exceed the number of catalytic time points at the abnormal temperature, a secondary catalytic temperature control command is generated and the secondary catalytic temperature control operation is executed.

[0041] Preferably, a heat recovery cycle operation is performed, the specific operation of which includes:

[0042] Upon receiving the heat recovery cycle command, the gas after primary catalysis is transported into the furnace duct by a deployed circulating fan. A temperature-regulating fan deployed within the furnace duct heats the gas, and a temperature sensor collects the temperature of the heated catalytic gas. A temperature threshold for the heated catalytic gas is set based on the upper limit of the allowable temperature of the circulating hot air. The heated catalytic gas temperature is then compared and analyzed with this threshold temperature. The specific analysis process includes:

[0043] If the temperature of the catalytic gas after heating exceeds the threshold temperature of the catalytic gas after heating, a circulating air control command is generated and sent to the temperature control terminal. The temperature control terminal then performs the operation of opening the adjustment damper and closing the temperature control fan in the furnace air duct. If the temperature of the catalytic gas after heating does not exceed the threshold temperature of the catalytic gas after heating, a circulating air delivery command is generated and sent to the temperature control terminal. The temperature control terminal then performs the operation of delivering the heated catalytic gas to the heating section in the furnace.

[0044] Preferably, a secondary catalytic temperature control operation is performed, the specific operation of which includes:

[0045] After receiving the secondary catalytic temperature control command, the difference between the gas temperature value after primary catalysis and the gas temperature threshold after primary catalysis is calculated to obtain the gas temperature control difference after primary catalysis.

[0046] The temperature control difference of the gas after primary catalysis is compared and analyzed with the secondary catalytic heating control level comparison table stored in the cloud database to generate the secondary catalytic heating level of the gas after primary catalysis. Each temperature control difference of the gas after primary catalysis corresponds to a secondary catalytic heating level, including high-demand secondary catalytic heating level and low-demand secondary catalytic heating level.

[0047] If the secondary catalytic heating level of the generated gas after primary catalysis is a high-demand secondary catalytic heating level, a primary catalytic temperature control signal is generated and sent to the temperature control terminal. The temperature control terminal then performs self-regulating heating of the gas after primary catalysis through the auxiliary heating tube before secondary catalysis or controls the heat exchange fan to send outside air into the heat exchange tube to mix with the gas after primary catalysis. After secondary catalysis, the exhaust damper is opened to complete the discharge operation of the gas after secondary catalysis.

[0048] If the secondary catalytic heating level of the generated gas after primary catalysis is a low-demand secondary catalytic heating level, a secondary catalytic temperature control signal is generated and sent to the temperature control terminal. The temperature control terminal then performs secondary catalysis on the gas after primary catalysis and controls the exhaust damper to open and discharge the gas after secondary catalysis.

[0049] This invention provides a multi-point temperature control system for an enameling machine oven, which has the following beneficial effects:

[0050] (1) By constructing a multi-point temperature intelligent control system for enameling machine ovens, the significant shortcomings of traditional ovens in terms of temperature acquisition, thermal field balance, response speed and control accuracy are effectively solved. The system realizes dynamic identification and active adjustment of multi-segment, multi-station and multi-time sequence thermal behavior in the oven cavity, improving the curing quality of the paint film, process stability and equipment operating efficiency. It realizes multi-zone, multi-segment and multi-point measurement and control, adapts to the production requirements of multi-specification and multi-oil processes, and the oven temperature in multi-segment can be flexibly adjusted. Secondly, the multi-level adjustment mechanism of the inlet baffle effectively reduces the intrusion of cold air. Finally, the primary catalytic temperature control and waste discharge linkage and secondary catalytic combined heat replenishment design ensure efficient solvent treatment and environmentally friendly emissions.

[0051] (2) By deploying multi-point, high-sensitivity temperature acquisition components within the oven cavity, and combining this with a dynamic temperature distribution recognition algorithm constructed based on the thermal field characteristics of the elongated oven cavity, the control system can perceive subtle temperature differences and temporal fluctuations in different sections in real time, solving the problem that traditional single-point detection methods cannot reflect the true thermal field state; by acquiring the surface smoothness coefficient of the paint film, the change value of the paint film thickness, and the evaporation rate of the paint solvent, the internal thermal behavior of the oven is analyzed, so that the control action no longer depends on a fixed set value, but can actively compensate and correct in real time according to the actual curing requirements; by using mathematical models to calculate and By introducing multi-level adjustment logic, the source of temperature deviation can be located, and the heating power, air flow rate, and temperature difference between sections can be adjusted to make the temperature distribution in key sections of the curing zone, heating zone, and preheating zone more stable. This not only effectively avoids defects such as local overheating, bubbling, and pinholes caused by uneven heating of the paint film, but also significantly improves the integrity of curing and cross-linking, keeping the paint film density, adhesion, color consistency, and insulation performance at a higher level. From the perspective of a longer production cycle, the improved thermal field uniformity makes product consistency easier to control, reduces rework and scrap rates, and improves the stability of overall production quality. Attached Figure Description

[0052] Figure 1 This is a block diagram of a multi-point temperature control system for an enameling machine oven according to the present invention;

[0053] Figure 2 This is a schematic diagram of the working process of the enameling machine oven. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] Example

[0056] Please see Figure 1 and Figure 2 The present invention provides a multi-point temperature control system for an enameling machine oven, including a cloud server, which is connected to a data acquisition module, a cloud database, an air intake analysis module, a section heating analysis module, a circulating catalytic analysis module, and a temperature control terminal.

[0057] The data acquisition module is used to collect the amount of cold air entering the enameling machine oven, the temperature status parameters of the heating zone, the effective heating and curing parameters of the target enameled wire, and the gas temperature parameters after primary catalysis, and to send the various types of data information to the cloud database for storage.

[0058] The cloud database is also used to store the deviation status control level judgment table, the effective heating and curing control level comparison table, and the secondary catalytic heating control level comparison table.

[0059] The air intake analysis module is used to analyze the deviation of the amount of cold air entering the enameling machine oven. The specific process includes:

[0060] During the transport of the target enameled wire, the flow meter deployed at the inlet of the enameled machine oven is used to monitor the cold air entering the oven in real time and obtain the amount of cold air entering at each monitoring period.

[0061] During the unit monitoring period, the safe upper limit of cold air entry at the inlet of the enameling machine oven during the transport of the target enameled wire is used as the cold air entry threshold.

[0062] The amount of cold air entering during each monitoring period is compared and analyzed with the cold air entry threshold. If the amount of cold air entering during the corresponding monitoring period exceeds the cold air entry threshold, the corresponding monitoring period is marked as an abnormal intrusion period. The total duration of the abnormal intrusion period is calculated, and the amount of cold air entering during the corresponding abnormal intrusion period is recorded. If the amount of cold air entering during the corresponding monitoring period does not exceed the cold air entry threshold, the corresponding monitoring period is marked as a normal intrusion period, and the total duration of the normal intrusion period is calculated.

[0063] If the total duration of the normal intrusion period exceeds the total duration of the abnormal intrusion period, a section heating analysis signal is generated and sent to the section heating analysis module; if the total duration of the normal intrusion period does not exceed the total duration of the abnormal intrusion period, an intake control command is generated and the intake control operation is executed.

[0064] Specifically, the intake control operation is performed, including the following steps:

[0065] After receiving the intake control command, the cold air intake amount during each abnormal intrusion period is subtracted from the cold air intake threshold to obtain the cold air intake deviation value for each abnormal intrusion period. The cold air intake deviation value for each abnormal intrusion period is then compared and matched with the deviation status control level judgment table stored in the cloud database to obtain the inlet damper adjustment level for each abnormal intrusion period. Each abnormal intrusion period corresponds to an inlet damper adjustment level, which includes a first-level inlet damper adjustment level, a second-level inlet damper adjustment level, and a third-level inlet damper adjustment level.

[0066] If the inlet damper adjustment level during the abnormal intrusion period is the first-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-1. If the inlet damper adjustment level during the abnormal intrusion period is the second-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-2. If the inlet damper adjustment level during the abnormal intrusion period is the third-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-3, and Bh-1 > Bh-2 > Bh-3 > 0.

[0067] It should be noted that the inlet baffle closure degree represents the actual degree of closure of the inlet baffle. It is a fine-tuning parameter for the amount of cold air entering the oven cavity. The higher the closure degree, the closer the baffle is to being completely closed, and the less cold air enters; conversely, the lower the closure degree, the greater the opening of the baffle, and the higher the amount of cold air entering. Its function is to quickly weaken the disturbance caused by abnormal cold air intrusion to the oven cavity temperature by adjusting the closure degree, so as to restore the thermal field to stability and thus ensure that the paint film curing process is not affected. The value of the closure degree is determined based on the correspondence between the cold air entry deviation value and the deviation level in the cloud database. For example, when the deviation is small, it is determined to be a level 1 inlet damper adjustment, and a higher closure degree Bh-1 is matched to slightly compress the inflow of cooling air; when it is determined to be a level 2 inlet damper adjustment, Bh-2 is matched; when it is determined to be a level 3 inlet damper adjustment, Bh-3 is matched. For example, if the cold air deviation is 5% during an abnormal period, corresponding to a level 1 inlet damper adjustment, the closure degree is Bh-1 (80%) as the damper closure degree for that period; if the deviation reaches 20%, corresponding to a level 3 adjustment, the closure degree is Bh-3 (40%) to match a stronger exhaust and compensation strategy. Through this graded closure control mechanism, the intake air volume can be dynamically matched to the furnace cavity demand, significantly improving the temperature control response speed and stability.

[0068] After performing the corresponding intake control operation during each abnormal intrusion period, a section heating analysis command is generated and sent to the section heating analysis module.

[0069] The section heating analysis module is used to determine and analyze the section heating status of the enameling machine oven, specifically including the following steps:

[0070] S1. After receiving the section heating analysis command, along the direction of travel of the target enameled wire, the temperature status of each heating section in the furnace is monitored in real time by the deployed temperature sensors to obtain the heating temperature value of each heating section. The initial heating temperature value of each section is set according to the historical temperature control adjustment parameters of the current target enameled wire type and recorded as the heating temperature reference value of each section. The heating section includes the inlet heating section, the evaporation heating section, the curing heating section and the outlet heating section, and each heating section contains a set of independently temperature-controlled heating tubes.

[0071] S2. Compare and analyze the heating temperature value of the corresponding heating section with the corresponding heating temperature reference value. The specific analysis process includes:

[0072] If the heating temperature value of the corresponding heating section is equal to the heating temperature reference value of the corresponding heating section, the corresponding heating section is marked as a normal heating section, and a normal heating command for the corresponding normal heating section is generated. At this time, the operation of maintaining the power of the heating tube in the current normal heating section is executed, and the heating temperature reference value of the current normal heating section is marked as the heating temperature standard value. If the heating temperature value of the corresponding heating section is not equal to the heating temperature reference value of the corresponding heating section, the corresponding heating section is marked as an abnormal heating section, and a temperature control trigger condition verification command for the corresponding abnormal heating section is generated.

[0073] S3. Based on the generated temperature control trigger condition verification command, collect the effective heating and curing parameters of the target enameled wire in the corresponding abnormal heating section. The specific collection process includes:

[0074] Collect the smooth area, bulging area, and concave area of ​​the target enameled wire within the corresponding abnormal heating section, and label them as sgh. i sgb i and sax i The three data points were correlated and, after dimensionless processing, the smoothness of the enameled wire coating surface within the corresponding abnormal heating section was analyzed to determine the smoothness coefficient of the enameled wire coating surface within the corresponding abnormal heating section. Specifically: In the formula, xgh i This represents the surface smoothness coefficient of the enameled wire in the i-th abnormal heating zone;

[0075] It should be noted that the smooth surface area represents the effective film-forming area where the paint film surface is flat, without defects, and without micro-undulations; the bulging surface area represents the micro-protrusion area caused by local overheating, expansion, or solvent residue; and the concave surface area represents the pitted area caused by local insufficient curing, uneven solvent evaporation, or paint film shrinkage. All three can be obtained by combining a visual inspection system with laser displacement scanning, reflection scattering imaging, or surface morphology signal reconstruction technology.

[0076] Collect the coating thickness values ​​before and after curing at each monitoring point of the target enameled wire within the corresponding abnormal heating section, and calibrate them as hgq. i,j and hgh i,j By calculating and analyzing the degree of change in the coating thickness of the target enameled wire within the corresponding abnormal heating section, the change value of the coating thickness of the target enameled wire within the corresponding abnormal heating section is determined. Specifically: In the formula, zbh i This represents the change in the coating thickness of the target enameled wire within the i-th abnormal heating zone, where j = 1, 2, 3, ..., n, and n represents the number of monitoring points.

[0077] It should be noted that the thickness value before curing represents the original film thickness when the paint has just been applied and has not yet undergone the heat treatment of that section; the thickness value after curing represents the final thickness of the paint film at the same monitoring point after passing through the heat treatment of that section, under the influence of shrinkage, densification or local over-curing; the acquisition of these two data usually relies on miniature online thickness measurement components, such as eddy current thickness probes, laser displacement probes or interferometric optical thickness detection devices;

[0078] Within a unit period Tz, the concentration of the paint solvent after evaporation and the concentration of the paint solvent before evaporation in the corresponding abnormal heating section are collected and denoted as czh respectively. i and czq i Based on the established data calculation model, the evaporation rate of the paint solvent in the target enameled wire within the corresponding abnormal heating section is analyzed, and the evaporation rate of the paint solvent in the target enameled wire within the corresponding abnormal heating section is determined. Specifically: In the formula, vsz i This represents the evaporation rate of the paint solvent in the target enameled wire within the i-th abnormal heating zone;

[0079] It should be noted that the concentration before evaporation represents the baseline solvent content in the furnace gas before the enameled wire enters the section, while the concentration after evaporation represents the new concentration level formed after the solvent released from the surface of the enameled wire enters the gas environment after the wire has passed through the section and been heated. The larger the difference between the two, the more intense the solvent evaporation and the more sensitive the curing process. Concentration data is usually obtained through gas analysis components installed at the inlet and outlet of the section, such as infrared absorption volatile organic compound analyzers (VOC sensors), miniature gas chromatograph detectors, or spectral concentration identification probes.

[0080] This outputs the effective heating and curing parameters of the target enameled wire within the corresponding abnormal heating zone. The surface smoothness coefficient, film thickness variation, and solvent evaporation rate within these parameters are correlated. After dimensionless processing, the effective heating and curing degree of the target enameled wire in the corresponding abnormal heating zone is analyzed, and the effective heating and curing index for that zone is determined. Specifically, zyx i =a1×xgh i +a2×zbh i +a3×vsz i In the formula, zyx i denoted as the effective heating curing index of the i-th abnormal heating zone, where a1, a2, and a3 represent the weight values ​​of the paint film surface smoothness coefficient, the paint film thickness variation value, and the paint solvent evaporation rate, respectively, and a1, a2, and a3 are all natural numbers greater than 0.

[0081] S4. Compare and analyze the effective heating and curing index of the corresponding abnormal heating sections with the pre-set effective curing comparison threshold. The specific comparison and analysis process includes:

[0082] S41. If the effective heating and curing index of the corresponding abnormal heating section exceeds the preset effective curing comparison threshold, it indicates that the target enameled wire of the corresponding abnormal heating section is in an effective heating and curing state. The effective heating and curing command of the corresponding abnormal heating section is generated. At this time, the operation of maintaining the power of the heating tube in the current normal heating section is executed, and the heating temperature reference value of the current abnormal heating section is marked as the heating temperature standard value.

[0083] S42. If the effective heating and curing index of the corresponding abnormal heating section does not exceed the preset effective curing comparison threshold, it indicates that the heating and curing of the target enameled wire in the corresponding abnormal heating section is invalid. At this time, a section heating control command for the corresponding abnormal heating section is generated, and the corresponding heating control operation is executed. The specific heating control operation process includes:

[0084] S421. When a section heating control command for a corresponding abnormal heating section is generated, the effective heating and curing index of the corresponding abnormal heating section is subtracted from the preset effective curing comparison threshold to obtain the effective heating and curing difference value of the corresponding abnormal heating section. The specific form is: effective heating and curing difference value = effective curing comparison threshold - effective heating and curing index.

[0085] S422. Compare and analyze the effective heating and curing difference values ​​of the corresponding abnormal heating sections with the effective heating and curing control level comparison table stored in the metadata database to obtain the heating control level of the corresponding abnormal heating section. Each effective heating and curing difference value corresponds to a heating control level, including a first-level heating control level, a second-level heating control level, and a third-level heating control level.

[0086] S423. If the heating control level of the corresponding abnormal heating section is Level 1, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P1. If the heating control level of the corresponding abnormal heating section is Level 2, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P2. If the heating control level of the corresponding abnormal heating section is Level 3, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P3, and P1 > P2 > P3 > 0.

[0087] At this time, the heating temperature generated by adjusting the heating power of the heating tube in the corresponding abnormal heating section is output and marked as the standard value of the heating temperature of the corresponding abnormal heating section.

[0088] S43. The standard heating temperature values ​​of each abnormal heating section are used as the new temperature control adjustment parameters for the current target enameled wire in the corresponding abnormal heating section. The parameters are then sent to the temperature control terminal to execute the subsequent curing process of the target type enameled wire. During the execution of the new temperature control adjustment parameters, a thermal cycling catalytic analysis command is sent out.

[0089] The circulating catalytic analysis module is used to analyze the thermal circulating catalytic effect in the enameling machine oven. The specific analysis process includes:

[0090] After receiving the thermal cycle catalytic analysis command, the temperature of the gas after catalysis in the main catalytic chamber of the enameling machine oven is monitored in real time by a temperature sensor to obtain the temperature value of the gas after primary catalysis at each monitoring time point.

[0091] Based on the ideal temperature for the catalytic reaction of pollutants, a pre-set threshold for the gas temperature after primary catalysis is established. The gas temperature values ​​after primary catalysis at each monitoring time point are compared and analyzed with the threshold. If the gas temperature value after primary catalysis at the corresponding monitoring time point is equal to the threshold, the corresponding monitoring time point is marked as the ideal temperature catalytic time point, and the number of ideal temperature catalytic time points is counted. If the gas temperature value after primary catalysis at the corresponding monitoring time point is not equal to the threshold, the corresponding monitoring time point is marked as the abnormal temperature catalytic time point, and the number of abnormal temperature catalytic time points is counted.

[0092] The post-catalytic gas temperature threshold represents the ideal target temperature required for pollutants to achieve efficient conversion during catalytic oxidation. It serves as a benchmark temperature point for determining whether the catalytic reaction is within its optimal operating range. Its significance lies in the fact that when the post-catalytic gas temperature reaches or approaches this threshold, the active sites on the catalyst surface are in their optimal reaction state, allowing pollutants to be fully decomposed or oxidized, achieving the highest catalytic efficiency. If the temperature deviates from the threshold, the reaction rate decreases or incomplete oxidation occurs, affecting the waste gas treatment effect and thermal energy utilization efficiency. This threshold is obtained through heating experiments on the catalytic furnace or regression analysis of historical production data: testing the conversion rate of volatile organic compounds (VOCs) or solvent components in the catalytic unit at different temperature ranges, and identifying the gas temperature corresponding to the peak conversion rate.

[0093] If the number of catalytic time points at the ideal temperature exceeds the number of catalytic time points at the abnormal temperature, a heat recovery cycle command is generated and the heat recovery cycle operation is executed. If the number of catalytic time points at the ideal temperature does not exceed the number of catalytic time points at the abnormal temperature, a secondary catalytic temperature control command is generated and the secondary catalytic temperature control operation is executed.

[0094] Specifically, the heat recovery cycle operation includes the following steps:

[0095] Upon receiving the heat recovery cycle command, the gas after primary catalysis is transported into the furnace duct by a deployed circulating fan. A temperature-regulating fan deployed within the furnace duct heats the gas, and a temperature sensor collects the temperature of the heated catalytic gas. A temperature threshold for the heated catalytic gas is set based on the upper limit of the allowable temperature of the circulating hot air. The heated catalytic gas temperature is then compared and analyzed with this threshold temperature. The specific analysis process includes:

[0096] If the temperature of the catalytic gas after heating exceeds the threshold temperature of the catalytic gas after heating, a circulating air control command is generated and sent to the temperature control terminal. The temperature control terminal then performs the operation of opening the adjustment damper and closing the temperature control fan in the furnace air duct. If the temperature of the catalytic gas after heating does not exceed the threshold temperature of the catalytic gas after heating, a circulating air delivery command is generated and sent to the temperature control terminal. The temperature control terminal then performs the operation of delivering the heated catalytic gas to the heating section in the furnace.

[0097] Specifically, the secondary catalytic temperature control operation includes the following steps:

[0098] After receiving the secondary catalytic temperature control command, the difference between the gas temperature value after primary catalysis and the gas temperature threshold after primary catalysis is calculated to obtain the gas temperature control difference after primary catalysis.

[0099] The temperature control difference of the gas after primary catalysis is compared and analyzed with the secondary catalytic heating control level comparison table stored in the cloud database to generate the secondary catalytic heating level of the gas after primary catalysis. Each temperature control difference of the gas after primary catalysis corresponds to a secondary catalytic heating level, including high-demand secondary catalytic heating level and low-demand secondary catalytic heating level.

[0100] If the secondary catalytic heating level of the generated gas after primary catalysis is a high-demand secondary catalytic heating level, a primary catalytic temperature control signal is generated and sent to the temperature control terminal. The temperature control terminal then performs self-regulating heating of the gas after primary catalysis through the auxiliary heating tube before secondary catalysis or controls the heat exchange fan to send outside air into the heat exchange tube to mix with the gas after primary catalysis. After secondary catalysis, the exhaust damper is opened to complete the discharge operation of the gas after secondary catalysis.

[0101] If the secondary catalytic heating level of the generated gas after primary catalysis is a low-demand secondary catalytic heating level, a secondary catalytic temperature control signal is generated and sent to the temperature control terminal. The temperature control terminal then performs secondary catalysis on the gas after primary catalysis and controls the exhaust damper to open and discharge the gas after secondary catalysis.

[0102] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0103] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product.

[0104] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0105] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0106] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0107] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-point temperature control system for an enameling machine oven, comprising a cloud server, wherein the cloud server is communicatively connected to a data acquisition module and a cloud database, characterized in that: The cloud server also has communication connections to an intake analysis module, a section heating analysis module, a cycle catalytic converter analysis module, and a temperature control terminal; The air intake analysis module is used to analyze the deviation of the cold air intake at the inlet of the enameling machine oven, thereby generating an air intake control command. After the air intake control operation is executed, a section heating analysis command is sent to the section heating analysis module. The section heating analysis module is used to judge and analyze the section heating status of the enameling machine oven after receiving the section heating analysis command, thereby identifying abnormal heating sections, generating corresponding section heating control commands for the abnormal heating sections, sending them to the temperature control terminal to execute the corresponding heating control operations, and then sending a thermal cycle catalytic analysis command to the cycle catalytic analysis module. The analysis and judgment of the heating status of different sections of the enameling machine oven includes the following steps: S1. After receiving the section heating analysis command, along the direction of travel of the target enameled wire, the temperature status of each heating section in the furnace is monitored in real time by the deployed temperature sensors to obtain the heating temperature value of each heating section. The initial heating temperature value of each section is set according to the historical temperature control adjustment parameters of the current target enameled wire type and recorded as the heating temperature reference value of each section. The heating section includes the inlet heating section, the evaporation heating section, the curing heating section and the outlet heating section, and each heating section contains a set of independently temperature-controlled heating tubes. S2. Compare and analyze the heating temperature value of the corresponding heating section with the corresponding heating temperature reference value. The specific analysis process includes: If the heating temperature value of the corresponding heating section is equal to the heating temperature reference value of the corresponding heating section, the corresponding heating section is marked as a normal heating section, and a normal heating command for the corresponding normal heating section is generated. At this time, the operation of maintaining the power of the heating tube in the current normal heating section is executed, and the heating temperature reference value of the current normal heating section is marked as the heating temperature standard value. If the heating temperature value of the corresponding heating section is not equal to the heating temperature reference value of the corresponding heating section, the corresponding heating section is marked as an abnormal heating section, and a temperature control trigger condition verification command for the corresponding abnormal heating section is generated. S3. Based on the generated temperature control trigger condition verification command, collect the effective heating and curing parameters of the target enameled wire in the corresponding abnormal heating section. The specific collection process includes: Collect the surface smooth area, surface bulge area and surface depression area of ​​the target enameled wire in the corresponding abnormal heating section, analyze the surface smoothness of the enameled wire in the corresponding abnormal heating section, and determine the surface smoothness coefficient of the enameled wire in the corresponding abnormal heating section. Collect the coating thickness values ​​before and after curing at each monitoring point of the target enameled wire in the corresponding abnormal heating section. Calculate and analyze the degree of coating thickness change of the target enameled wire in the corresponding abnormal heating section to determine the coating thickness change value of the target enameled wire in the corresponding abnormal heating section. Within a unit period Tz, the concentration of paint solvent after evaporation and the concentration of paint solvent before evaporation in the corresponding abnormal heating section are collected. Based on the set data calculation model, the evaporation rate level of paint solvent in the target enameled wire in the corresponding abnormal heating section is analyzed, and the evaporation rate of paint solvent in the target enameled wire in the corresponding abnormal heating section is determined. This outputs the effective heating and curing parameters of the target enameled wire in the corresponding abnormal heating zone, and correlates the surface smoothness coefficient of the paint film, the change value of the paint film thickness and the evaporation rate of the paint solvent in the effective heating and curing parameters of the target enameled wire. After dimensionless processing, the effective heating and curing degree of the target enameled wire in the corresponding abnormal heating zone is analyzed, and the effective heating and curing index of the corresponding abnormal heating zone is determined. S4. Compare and analyze the effective heating and curing index of the corresponding abnormal heating sections with the pre-set effective curing comparison threshold. The specific comparison and analysis process includes: S41. If the effective heating and curing index of the corresponding abnormal heating section exceeds the preset effective curing comparison threshold, it indicates that the target enameled wire of the corresponding abnormal heating section is in an effective heating and curing state. The effective heating and curing command of the corresponding abnormal heating section is generated. At this time, the operation of maintaining the power of the heating tube in the current normal heating section is executed, and the heating temperature reference value of the current abnormal heating section is marked as the heating temperature standard value. S42. If the effective heating and curing index of the corresponding abnormal heating section does not exceed the preset effective curing comparison threshold, it indicates that the heating and curing of the target enameled wire in the corresponding abnormal heating section is invalid. At this time, a section heating control command for the corresponding abnormal heating section is generated, and the corresponding heating control operation is executed. The specific heating control operation process includes: S421. When a section heating control command for a corresponding abnormal heating section is generated, the effective heating and curing index of the corresponding abnormal heating section is subtracted from the preset effective curing comparison threshold to obtain the effective heating and curing difference value of the corresponding abnormal heating section. The specific form is: effective heating and curing difference value = effective curing comparison threshold - effective heating and curing index. S422. Compare and analyze the effective heating and curing difference values ​​of the corresponding abnormal heating sections with the effective heating and curing control level comparison table stored in the metadata database to obtain the heating control level of the corresponding abnormal heating section. Each effective heating and curing difference value corresponds to a heating control level, including a first-level heating control level, a second-level heating control level, and a third-level heating control level. S423. If the heating control level of the corresponding abnormal heating section is Level 1, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P1. If the heating control level of the corresponding abnormal heating section is Level 2, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P2. If the heating control level of the corresponding abnormal heating section is Level 3, then the power of the heating tube in the current abnormal heating section is adjusted to the heating power P3, and P1 > P2 > P3 > 0. At this time, the heating temperature generated by adjusting the heating power of the heating tube in the corresponding abnormal heating section is output and marked as the standard value of the heating temperature of the corresponding abnormal heating section. S43. The standard value of the heating temperature of each abnormal heating section is used as the new temperature control adjustment parameter of the current target enameled wire in the corresponding abnormal heating section, and it is sent to the temperature control terminal to execute the subsequent target type enameled wire curing process. During the execution of the new temperature control adjustment parameter, a thermal cycle catalytic analysis command is sent out. The circulating catalytic analysis module is used to analyze the thermal circulating catalytic effect in the enameling machine oven after receiving the thermal circulating catalytic analysis command, and generate circulating air control command and secondary catalytic temperature control command accordingly, and send them to the temperature control terminal to execute the corresponding heat recovery circulation operation and secondary catalytic temperature control operation.

2. The multi-point temperature control system for an enameling machine oven according to claim 1, characterized in that: The data acquisition module is used to collect the amount of cold air entering the enameling machine oven, the temperature status parameters of the heating section, the effective heating and curing parameters of the target enameled wire, and the gas temperature parameters after primary catalysis, and to send the various types of data information to the cloud database for storage.

3. The multi-point temperature control system for an enameling machine oven according to claim 1, characterized in that: The cloud database is also used to store a deviation status control level judgment table, an effective heating and curing control level comparison table, and a secondary catalytic heating control level comparison table.

4. The multi-point temperature control system for an enameling machine oven according to claim 1, characterized in that: The analysis of the deviation in the amount of cold air entering the enameling machine oven includes the following specific steps: During the transport of the target enameled wire, the flow meter deployed at the inlet of the enameled machine oven is used to monitor the cold air entering the oven in real time and obtain the amount of cold air entering at each monitoring period. During the unit monitoring period, the safe upper limit of cold air entry at the inlet of the enameling machine oven during the transport of the target enameled wire is used as the cold air entry threshold. The amount of cold air entering during each monitoring period is compared and analyzed with the cold air entry threshold. If the amount of cold air entering during the corresponding monitoring period exceeds the cold air entry threshold, the corresponding monitoring period is marked as an abnormal intrusion period. The total duration of the abnormal intrusion period is calculated, and the amount of cold air entering during the corresponding abnormal intrusion period is recorded. If the amount of cold air entering during the corresponding monitoring period does not exceed the cold air entry threshold, the corresponding monitoring period is marked as a normal intrusion period, and the total duration of the normal intrusion period is calculated. If the total duration of the normal intrusion period exceeds the total duration of the abnormal intrusion period, a section heating analysis signal is generated and sent to the section heating analysis module; if the total duration of the normal intrusion period does not exceed the total duration of the abnormal intrusion period, an intake control command is generated and the intake control operation is executed.

5. The multi-point temperature control system for an enameling machine oven according to claim 1, characterized in that: Perform intake control operations, specifically including: After receiving the intake control command, the cold air intake amount during each abnormal intrusion period is subtracted from the cold air intake threshold to obtain the cold air intake deviation value for each abnormal intrusion period. The cold air intake deviation value for each abnormal intrusion period is then compared and matched with the deviation status control level judgment table stored in the cloud database to obtain the inlet damper adjustment level for each abnormal intrusion period. Each abnormal intrusion period corresponds to an inlet damper adjustment level, which includes a first-level inlet damper adjustment level, a second-level inlet damper adjustment level, and a third-level inlet damper adjustment level. If the inlet damper adjustment level during the abnormal intrusion period is the first-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-1. If the inlet damper adjustment level during the abnormal intrusion period is the second-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-2. If the inlet damper adjustment level during the abnormal intrusion period is the third-level inlet damper adjustment level, then the inlet damper closure degree matched for the abnormal intrusion period is Bh-3, and Bh-1 > Bh-2 > Bh-3 > 0. After performing the corresponding intake control operation during each abnormal intrusion period, a section heating analysis command is generated and sent to the section heating analysis module.

6. The multi-point temperature control system for an enameling machine oven according to claim 1, characterized in that: The thermal circulation catalytic effect within the enameling machine oven was analyzed. The specific analysis process included: After receiving the thermal cycle catalytic analysis command, the temperature of the gas after catalysis in the main catalytic chamber of the enameling machine oven is monitored in real time by a temperature sensor to obtain the temperature value of the gas after primary catalysis at each monitoring time point. Based on the ideal temperature for the catalytic reaction of pollutants, a pre-set threshold for the gas temperature after primary catalysis is established. The gas temperature values ​​after primary catalysis at each monitoring time point are compared and analyzed with the threshold. If the gas temperature value after primary catalysis at the corresponding monitoring time point is equal to the threshold, the corresponding monitoring time point is marked as the ideal temperature catalytic time point, and the number of ideal temperature catalytic time points is counted. If the gas temperature value after primary catalysis at the corresponding monitoring time point is not equal to the threshold, the corresponding monitoring time point is marked as the abnormal temperature catalytic time point, and the number of abnormal temperature catalytic time points is counted. If the number of catalytic time points at the ideal temperature exceeds the number of catalytic time points at the abnormal temperature, a heat recovery cycle command is generated and the heat recovery cycle operation is executed. If the number of catalytic time points at the ideal temperature does not exceed the number of catalytic time points at the abnormal temperature, a secondary catalytic temperature control command is generated and the secondary catalytic temperature control operation is executed.

7. The multi-point temperature control system for an enameling machine oven according to claim 1, characterized in that: The specific operations involved in performing a heat recovery cycle include: Upon receiving the heat recovery cycle command, the gas after primary catalysis is transported into the furnace duct by a deployed circulating fan. A temperature-regulating fan within the furnace duct heats the gas, and a temperature sensor collects the temperature of the heated catalytic gas. A temperature threshold for the heated catalytic gas is set based on the upper limit of the allowable temperature for the circulating hot air. The temperature of the catalytic gas after heating was compared and analyzed with the threshold temperature of the catalytic gas after heating. The specific analysis process included: If the temperature of the catalytic gas after heating exceeds the threshold temperature of the catalytic gas after heating, a circulating air control command is generated and sent to the temperature control terminal. The temperature control terminal then performs the operation of opening the adjustment damper and closing the temperature control fan in the furnace air duct. If the temperature of the catalytic gas after heating does not exceed the threshold temperature of the catalytic gas after heating, a circulating air delivery command is generated and sent to the temperature control terminal. The temperature control terminal then performs the operation of delivering the heated catalytic gas to the heating section in the furnace.

8. The multi-point temperature control system for an enameling machine oven according to claim 1, characterized in that: The specific procedures for performing secondary catalytic temperature control include: After receiving the secondary catalytic temperature control command, the difference between the gas temperature value after primary catalysis and the gas temperature threshold after primary catalysis is calculated to obtain the gas temperature control difference after primary catalysis. The temperature control difference of the gas after primary catalysis is compared and analyzed with the secondary catalytic heating control level comparison table stored in the cloud database to generate the secondary catalytic heating level of the gas after primary catalysis. Each temperature control difference of the gas after primary catalysis corresponds to a secondary catalytic heating level, including high-demand secondary catalytic heating level and low-demand secondary catalytic heating level. If the secondary catalytic heating level of the generated gas after primary catalysis is a high-demand secondary catalytic heating level, a primary catalytic temperature control signal is generated and sent to the temperature control terminal. The temperature control terminal then performs self-regulating heating of the gas after primary catalysis through the auxiliary heating tube before secondary catalysis or controls the heat exchange fan to send outside air into the heat exchange tube to mix with the gas after primary catalysis. After secondary catalysis, the exhaust damper is opened to complete the discharge operation of the gas after secondary catalysis. If the secondary catalytic heating level of the generated gas after primary catalysis is a low-demand secondary catalytic heating level, a secondary catalytic temperature control signal is generated and sent to the temperature control terminal. The temperature control terminal then performs secondary catalysis on the gas after primary catalysis and controls the exhaust damper to open and discharge the gas after secondary catalysis.

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