Drying apparatus, control method and device therefor, and storage medium

Abstract

Disclosed in the present application are a drying apparatus, a control method and device therefor, and a storage medium. The method comprises: on the basis of the current temperature in a drying oven and a target temperature, determining a first opening degree adjustment value of a heat supply pipe valve of a drying apparatus; on the basis of the temperature of a heat supply pipe and the temperature of a heat source recovery pipe of the drying apparatus, determining a second opening degree adjustment value of the heat supply pipe valve; and, on the basis of the minimum value of the first opening degree adjustment value and the second opening degree adjustment value, controlling the opening degree of the heat supply pipe valve. In the embodiments of the present application, during the process of drying battery components, the drying adjustment effect is stable, and the drying efficiency is relatively high.

Description

Drying equipment, control method, device and storage medium thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311017553.3, filed on August 14, 2023, entitled “Drying equipment, control method, device and storage medium thereof,” and the entire contents of that application are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery processing technology, and in particular to a drying device and a control method, device and storage medium thereof. Background Art

[0004] In the battery processing industry, battery components such as separators and pole pieces typically require drying equipment during the coating process. Separators and pole pieces are crucial components of lithium-ion batteries, so the commissioning, energy consumption, and stability of drying equipment significantly impact battery production capacity and cost. However, the current drying equipment's adjustment process relies entirely on manual labor, relying heavily on experience and complex adjustment methods. This results in lengthy commissioning times and unstable results. Unstable drying performance can also impact battery coating production capacity.

[0005] Summary of the Invention

[0006] In view of the above problems, the present application provides a drying device and its control method, device and storage medium, which can solve the technical problems of unstable drying adjustment effect and low drying efficiency of battery components during the drying process in related technologies.

[0007] In the first aspect, the present application provides a control method for drying equipment, including: determining a first opening adjustment value of a heating pipe valve of the drying equipment based on a current temperature and a target temperature in an oven; determining a second opening adjustment value of the heating pipe valve based on a heating pipe temperature and a heat source recovery pipe temperature of the drying equipment; and controlling the opening of the heating pipe valve based on the minimum value between the first opening adjustment value and the second opening adjustment value.

[0008] In the technical solution of the embodiment of the present invention, an adjustment value of the heating pipe valve opening is obtained according to the current temperature in the oven and the set target temperature, and another adjustment value of the heating pipe valve opening is determined by the temperature of the passing heating pipe and the temperature of the heat source recovery pipe. Then, the smallest value of the two is taken as the opening of the heating pipe valve. This not only improves the drying efficiency and drying adjustment effect, but also controls the heat source flow of the heating pipe with the minimum adjustment value, thereby saving energy while increasing the production capacity of battery coating.

[0009] In some embodiments, a first opening adjustment value of the heating pipe valve of the drying device is determined based on the current temperature and the target temperature in the drying oven, and a first difference between the current temperature in the drying oven and the target temperature is determined; a first proportional adjustment value and a first integral adjustment value of the heating pipe valve are calculated based on a first proportional adjustment coefficient, a first integral adjustment coefficient, and the first difference; and the sum of the first proportional adjustment value and the first integral adjustment value is determined as the first opening adjustment value. In this embodiment, the opening of the heating pipe valve is obtained based on the proportional and integral algorithm, which can accurately control the opening of the heating pipe valve of the drying device.

[0010] In some embodiments, determining the second opening adjustment value of the heating pipe valve based on the heating pipe temperature and the heat source recovery pipe temperature of the drying equipment includes: determining the temperature difference between the heating pipe temperature and the heat source recovery pipe temperature, and determining the second difference between the temperature difference and the target temperature; calculating the second proportional adjustment value and the second integral adjustment value of the heating pipe valve based on the second proportional adjustment coefficient, the second integral adjustment coefficient and the second difference; and determining the sum of the second proportional adjustment value and the second integral adjustment value as the second opening adjustment value.

[0011] In this embodiment, the opening of the heating pipe valve is obtained based on the proportional and integral algorithm and the temperature difference between the heating pipe temperature and the heat source recovery pipe temperature, so that the opening of the heating pipe valve of the drying equipment can be accurately controlled.

[0012] In some embodiments, the drying device control method further includes: obtaining the internal temperature of the oven detected by multiple temperature detectors, the multiple temperature detectors being located at different locations within the oven; and using the average of the multiple internal temperatures as the current temperature within the drying device. In this embodiment, the temperature detectors located at different locations within the drying device can accurately obtain the current temperature within the oven, providing accurate temperature data for controlling the opening of the heating pipe valve of the drying device.

[0013] In some embodiments, the drying equipment control method further includes: determining a third opening adjustment value corresponding to the drying equipment's air valve based on the current concentration and target concentration of the target solvent material within the drying equipment; and controlling the opening of the air valve based on the third opening adjustment value. In this embodiment, by controlling the openings of the exhaust and return air valves through real-time detection of the current and target concentrations of the target solvent material, hot air loss is reduced within the concentration control range, thereby achieving efficient energy conservation.

[0014] In some embodiments, determining the third opening adjustment value corresponding to the air valve of the drying equipment based on the current concentration and the target concentration of the target solvent material in the drying equipment includes: determining a third difference between the current concentration and the target concentration of the target solvent material; determining a third proportional adjustment value and a third integral adjustment value of the opening of the air valve based on a third proportional adjustment coefficient, a third integral adjustment coefficient and the third difference; and determining the sum of the third proportional adjustment value and the third integral adjustment value as the third opening adjustment value.

[0015] In this embodiment, the opening of the air valve of the drying equipment is obtained based on the proportional and integral algorithm, as well as the concentration difference between the current concentration of the target solvent material and the target concentration. This can accurately control the opening of the air valve of the drying equipment and the concentration of the target solvent material in the oven, thereby improving the safety of the battery processing process.

[0016] In some embodiments, the air valves include an exhaust air valve and a return air valve, and controlling the openings of the air valves based on the third opening adjustment value includes: controlling the opening of the exhaust air valve or the return air valve based on the third opening adjustment value; wherein the sum of the openings of the exhaust air valve and the return air valve is equal to a preset opening. In this embodiment, by controlling the sum of the openings of the exhaust air valve and the return air valve to be equal to the preset opening, the concentration of the target solvent material in the oven can be precisely controlled while maintaining a balanced air volume.

[0017] In some embodiments, the control method for the drying equipment further includes: obtaining a detected concentration of the target solvent material detected by multiple concentration detectors, the multiple concentration detectors being located at different positions within the drying oven; and using the maximum of the multiple detected concentrations as the current concentration of the target solvent material. In this embodiment, the concentration of the target solvent material within the drying oven can be accurately obtained by using the concentration detectors located at different positions within the drying equipment. Using the maximum of the multiple detected concentrations as the current concentration of the target solvent material can effectively ensure safety during battery processing.

[0018] In some embodiments, the control method of the drying equipment also includes: determining the adjustment frequency corresponding to the fan in the drying equipment based on the current wind speed and target wind speed of the fan; wherein the fan is used to supply air to the heating coil of the drying equipment; and controlling the wind speed of the fan based on the adjustment frequency.

[0019] In this embodiment, the fan operating frequency of the drying equipment is accurately controlled by the detected wind speed to ensure that the wind speed meets the production requirements of the oven and the fan can adjust its operating frequency as required.

[0020] In some embodiments, determining the corresponding adjustment frequency of the fan based on the current wind speed and the target wind speed of the fan in the drying equipment includes: determining a fourth difference between the current wind speed of the fan and the target wind speed; determining a fourth proportional adjustment value and a fourth integral adjustment value corresponding to the fan based on a fourth proportional adjustment coefficient, a fourth integral adjustment coefficient, and the fourth difference; and determining the sum of the fourth proportional adjustment value and the fourth integral adjustment value as the corresponding adjustment frequency of the fan. In this embodiment, based on the proportional and integral algorithm and the wind speed difference between the current wind speed and the target wind speed, the operating frequency of the fan can be accurately obtained and controlled, ensuring that the wind speed meets the production requirements of the oven and achieving the fan frequency adjustment operation according to demand.

[0021] In a second aspect, an embodiment of the present invention provides a control device for drying equipment, comprising a first determination unit for determining a first opening adjustment value of a heating pipe valve of the drying equipment based on a current temperature and a target temperature in an oven; a second determination unit for determining a second opening adjustment value of the heating pipe valve based on a temperature of the heating pipe and a temperature of a heat source recovery pipe of the drying equipment; and a first control unit for controlling the opening of the heating pipe valve based on the minimum value of the first opening adjustment value and the second opening adjustment value.

[0022] In a third aspect, an embodiment of the present invention provides a drying device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method described in the first aspect is implemented.

[0023] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0026] FIG1 is a flow chart of a control method for drying equipment provided in an embodiment of the present application;

[0027] FIG2 is a flow chart of another method for controlling a drying device according to an embodiment of the present application;

[0028] FIG3 is a flow chart of another method for controlling a drying device provided in an embodiment of the present application;

[0029] FIG4 is a schematic structural diagram of a drying device provided in an embodiment of the present application;

[0030] FIG5 is a schematic structural diagram of a control device for drying equipment provided in an embodiment of the present application;

[0031] FIG6 is a schematic structural diagram of another drying device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present invention, technical terms such as "first" and "second" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0035] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of the present invention, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exists simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0037] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0038] Currently, in the battery processing industry, battery components such as separators and pole pieces typically require drying equipment during the coating process. Separators and pole pieces are crucial components of lithium-ion batteries, so the commissioning, energy consumption, and stability of drying equipment significantly impact battery production capacity and cost. However, the current drying equipment's adjustment process relies entirely on manual labor, relying heavily on experience, and is complex. This results in lengthy commissioning times, unstable results, and low drying efficiency.

[0039] In order to improve the stability of the debugging effect of the drying equipment and improve the drying efficiency of the drying equipment, the present application designs a drying equipment and its control method. The method determines the first opening adjustment value of the heating pipe valve of the drying equipment according to the current temperature and the target temperature in the oven; determines the second opening adjustment value of the heating pipe valve according to the heating pipe temperature and the heat source recovery pipe temperature of the drying equipment; and controls the opening of the heating pipe valve based on the minimum value of the first opening adjustment value and the second opening adjustment value.

[0040] The control method for the drying equipment described above determines one adjustment value for the heating pipe valve opening based on the current oven temperature and the set target temperature. It also determines another adjustment value for the heating pipe valve opening based on the passing heating pipe temperature and the heat recovery pipe temperature. The minimum of the two values ​​is then taken as the heating pipe valve opening. This not only improves drying efficiency and drying regulation, but also controls the heat source flow rate of the heating pipe with the minimum adjustment value, thereby increasing battery coating production capacity while saving energy. This control method for drying equipment has few limitations and is highly universal.

[0041] Referring to the flow chart of the control method of the drying equipment shown in FIG1 , the method specifically includes the following steps:

[0042] S101: Determining a first opening adjustment value of a heating pipe valve of the drying device according to the current temperature in the oven and the target temperature;

[0043] S102: determining a second opening adjustment value of the heating pipe valve according to the temperature of the heating pipe and the temperature of the heat source recovery pipe of the drying equipment;

[0044] S103: Control the opening of the heating pipe valve based on the minimum value between the first opening adjustment value and the second opening adjustment value.

[0045] Specifically, in an embodiment of the present invention, as shown in FIG4 , the current temperature of the oven can be obtained by a temperature sensor T3 provided in the oven of the drying equipment. The target temperature here is the temperature required for production, including but not limited to being set as needed by a programmable logic controller (PLC); based on the temperature difference between the current oven temperature obtained by the temperature sensor T3 and the target temperature set by the system, the corresponding relationship between the opening adjustment value of the heating pipe valve and the temperature difference is further compared, thereby determining the first opening adjustment value of the heating pipe valve. The real-time temperature of the heating pipe temperature of the drying equipment can be obtained by the temperature sensor T1, and the real-time temperature of the heat source recovery pipe can be obtained by the temperature sensor T2. Based on the difference ΔT between the temperatures detected by T1 and T2, and based on the difference ΔT and the target temperature, the second opening adjustment value of the heating pipe valve can be determined.

[0046] In an embodiment of the present invention, an adjustment value of the heating pipe valve opening is obtained according to the current temperature in the oven and the set target temperature, and another adjustment value of the heating pipe valve opening is determined by the temperature of the passing heating pipe and the temperature of the heat source recovery pipe. Then, the smallest value of the two is taken as the opening of the heating pipe valve. This not only improves the drying efficiency and the drying adjustment effect, but also controls the heat source flow of the heating pipe with the least adjustment value, thereby increasing the production capacity of battery coating and saving energy.

[0047] In one or more embodiments, determining the first opening adjustment value of the heating pipe valve of the drying device according to the current temperature in the oven and the target temperature includes:

[0048] determining a first difference between a current temperature within the oven and a target temperature;

[0049] Calculating a first proportional adjustment value and a first integral adjustment value of the heating pipe valve according to the first proportional adjustment coefficient, the first integral adjustment coefficient and the first difference;

[0050] The sum of the first proportional adjustment value and the first integral adjustment value is determined as the first opening adjustment value.

[0051] Specifically, in the embodiments of the present application, including but not limited to obtaining the adjustment value of the heating pipe valve through a PID (Proportional Integral Derivative) algorithm, as shown in FIG4 , a first difference between the current temperature in the oven and the target temperature is determined; a first proportional adjustment value and a first integral adjustment value of the heating pipe valve are calculated based on a first proportional adjustment coefficient (KP1), a first integral adjustment coefficient (KI1), and the first difference, according to a linear relationship between valve opening and adjustment value; and the sum of the first proportional adjustment value and the first integral adjustment value, PI1, is determined as the first opening adjustment value.

[0052] Here, the first opening adjustment value is calculated including but not limited to using formula (1).

[0053] Among them, PI1(t) is the first opening adjustment value corresponding to the current moment, e(t) is the first difference corresponding to the current moment, KP1 is the first proportional adjustment coefficient, KI1 is the first integral adjustment coefficient, is the cumulative value of the integral from the start time to the current time e(t). KP1*e(t) is the first proportional adjustment value corresponding to the current time, is the first integral adjustment value corresponding to the current moment.

[0054] In the embodiment of the present application, the opening of the heating pipe valve is obtained based on the proportional and integral algorithm, so that the opening of the heating pipe valve of the drying equipment can be accurately controlled.

[0055] In one or more embodiments, determining the second opening adjustment value of the heating pipe valve according to the temperature of the heating pipe and the temperature of the heat source recovery pipe of the drying equipment includes:

[0056] Determining a temperature difference between the temperature of the heat supply pipe and the temperature of the heat source recovery pipe, and determining a second difference between the temperature difference and the target temperature;

[0057] Calculating a second proportional adjustment value and a second integral adjustment value of the heating pipe valve according to the second proportional adjustment coefficient, the second integral adjustment coefficient and the second difference;

[0058] The sum of the second proportional adjustment value and the second integral adjustment value is determined as the second opening adjustment value.

[0059] Specifically, in an embodiment of the present invention, as shown in FIG4 , the real-time temperature of the heating pipe of the drying device can be obtained via temperature sensor T1, and the real-time temperature of the heat source recovery pipe can be obtained via temperature sensor T2. A temperature difference ΔT between the temperature of the heating pipe and the temperature of the heat source recovery pipe is determined, and a second difference between the temperature difference ΔT and the target temperature is determined. A second proportional adjustment value and a second integral adjustment value of the heating pipe valve are calculated based on a second proportional adjustment coefficient (KP2), a second integral adjustment coefficient (KI2), and the second difference; and the sum of the second proportional adjustment value and the second integral adjustment value is determined as the second opening adjustment value PI2.

[0060] Here, the second opening adjustment value is calculated including but not limited to using formula (2).

[0061] Among them, PI2(t) is the second opening adjustment value corresponding to the current moment, e(t) is the second difference corresponding to the current moment, KP2 is the second proportional adjustment coefficient, KI2 is the second integral adjustment coefficient, is the cumulative value of the integral from the start time to the current time e(t). KP2*e(t) is the second proportional adjustment value corresponding to the current time, is the second integral adjustment value corresponding to the current moment.

[0062] In an embodiment of the present application, the opening of the heating pipe valve is obtained based on the proportional and integral algorithm, as well as the temperature difference between the heating pipe temperature and the heat source recovery pipe temperature, so that the opening of the heating pipe valve of the drying equipment can be accurately controlled.

[0063] In one or more embodiments, the control method of the drying device further includes: obtaining the internal temperature of the oven detected by a plurality of temperature detectors, the plurality of temperature detectors being arranged at different positions in the oven;

[0064] The average value of the obtained multiple internal temperatures is used as the current temperature in the drying device.

[0065] In an embodiment of the present application, to improve the accuracy of oven internal temperature detection, multiple temperature sensors are located at different locations within the drying device, and the average temperature obtained by the multiple temperature sensors is used as the current temperature within the drying device. This provides accurate temperature data for controlling the opening of the drying device's heating pipe valve.

[0066] The embodiment of the present invention further provides a control method for a drying device, as shown in FIG2 , the method specifically comprises the following steps:

[0067] S201, determining a third opening adjustment value corresponding to the air valve of the drying device according to the current concentration of the target solvent material in the oven and the target concentration;

[0068] S202: Control the opening of the air valve based on the third opening adjustment value.

[0069] Specifically, in an embodiment of the present application, the target solvent material includes, for example, NMP (N-methylpyrrolidone) chemical solvents. When the NMP concentration in the oven exceeds a critical value, it is easy to cause an explosion, resulting in a safety accident. Therefore, the accuracy of the concentration control of the target solvent material is extremely important. As shown in Figure 4, the concentration detectors C1 and C2 set in the oven are used to obtain the current concentration of the target solvent material in the oven in real time. The target concentration here is the concentration required for production, including but not limited to setting it on demand through the PLC. Based on the current concentration of the target solvent material in the oven and the target concentration, the third opening adjustment value corresponding to the air valve of the drying equipment is accurately obtained.

[0070] In an embodiment of the present application, the current concentration and target concentration of the target solvent material are detected in real time to control the opening of the exhaust air valve and the return air valve, thereby reducing the loss of hot air within the concentration control range, thereby achieving energy saving.

[0071] In one or more embodiments, determining the third opening adjustment value corresponding to the air valve of the drying device according to the current concentration and the target concentration of the target solvent material in the oven includes:

[0072] determining a third difference between the current concentration and the target concentration of the target solvent material;

[0073] determining a third proportional adjustment value and a third integral adjustment value of the opening of the air valve according to the third proportional adjustment coefficient, the third integral adjustment coefficient and the third difference;

[0074] The sum of the third proportional adjustment value and the third integral adjustment value is determined as the third opening adjustment value.

[0075] Specifically, in an embodiment of the present invention, as shown in FIG4 , concentration detectors C1 and C2 are used to obtain the current concentration of the target solvent material in real time, and a third difference between the current concentration and the target concentration is determined. A third proportional adjustment value and a third integral adjustment value of the heating pipe valve are calculated based on a third proportional adjustment coefficient (KP3), a third integral adjustment coefficient (KI3), and the third difference. The sum of the third proportional adjustment value and the third integral adjustment value is determined as the third opening adjustment value PI3.

[0076] Here, the third opening adjustment value is calculated including but not limited to using formula (3).

[0077] Among them, PI3(t) is the third opening adjustment value corresponding to the current moment, e(t) is the third difference corresponding to the current moment, KP3 is the third proportional adjustment coefficient, KI3 is the third integral adjustment coefficient, is the cumulative value of the integral from the start time to the current time e(t). KP3*e(t) is the third proportional adjustment value corresponding to the current time, The third integral adjustment value corresponding to the current moment is obtained. In this embodiment of the present application, the opening of the drying device's air valve is determined based on a proportional and integral algorithm and the difference between the current concentration of the target solvent material and the target concentration. This allows for precise control of the drying device's air valve opening and the concentration of the target solvent material within the oven, thereby improving safety during battery processing.

[0078] Specifically, in an embodiment of the present invention, the air valve includes an exhaust air valve and a return air valve, and controlling the opening of the air valve based on the third opening adjustment value includes:

[0079] The opening of the exhaust air valve or the opening of the return air valve is controlled based on the third opening adjustment value; wherein the sum of the opening of the exhaust air valve and the opening of the return air valve is equal to the preset opening.

[0080] Specifically, in the embodiments of the present application, to ensure stable air volume, the preset opening is typically set to 1. For example, when the exhaust air valve is controlled to open at 70% based on the third opening adjustment value, the return air valve is opened at 30%. When the return air valve is controlled to open at 70% based on the third opening adjustment value, the exhaust air valve is opened at 30%. By controlling the sum of the exhaust air valve opening and the return air valve opening to equal the preset opening, the concentration of the target solvent material in the oven can be precisely controlled while maintaining a balanced air volume.

[0081] In one or more embodiments, the control method of the drying equipment further includes:

[0082] obtaining a detection concentration of a target solvent material detected by a plurality of concentration detectors, wherein the plurality of concentration detectors are arranged at different positions within the oven;

[0083] The maximum value of the multiple detected concentrations is taken as the current concentration of the target solvent material.

[0084] Specifically, in an embodiment of the present application, as shown in FIG4 , multiple concentration detectors, such as concentration detector C1 and concentration detector C2, are arranged at different positions in the oven, and the maximum value of the concentrations detected by C1 and C2 is used as the current concentration of the target solvent material.

[0085] In an embodiment of the present application, by setting concentration detectors at different positions in the drying equipment, the concentration of the target solvent material in the oven can be accurately obtained, and the maximum value of the multiple detected concentrations obtained is used as the current concentration of the target solvent material, which can effectively ensure the safety of the battery processing process.

[0086] The embodiment of the present invention further provides a control method for drying equipment, as shown in FIG3 , the method specifically comprises the following steps:

[0087] S301, determining a corresponding adjustment frequency of a fan in a drying device according to a current wind speed and a target wind speed of the fan, wherein the fan is used to supply air to a heating coil of the drying device;

[0088] S302: Control the wind speed of the fan based on the adjustment frequency.

[0089] Specifically, in an embodiment of the present invention, as shown in Figure 4, the current wind speed of the fan that supplies air to the heating coil of the drying equipment can be obtained by means of a wind speed sensor V1 arranged in the oven of the drying equipment. The target wind speed here is the wind speed required for production, including but not limited to being set on demand through a PLC; the wind speed difference between the current wind speed of the fan obtained by the wind speed sensor V1 and the target wind speed set by the system is further compared with the correspondence between the frequency of the fan and the wind speed, so that the corresponding adjustment frequency of the fan can be determined.

[0090] In an embodiment of the present application, the fan operating frequency of the drying equipment is accurately controlled by the detected wind speed to ensure that the wind speed meets the production requirements of the oven and the fan can adjust its operating frequency as required.

[0091] In one or more embodiments, determining the adjustment frequency corresponding to the fan in the drying device according to the current wind speed and the target wind speed of the fan includes:

[0092] determining a fourth difference between a current wind speed of the wind turbine and a target wind speed;

[0093] determining a fourth proportional adjustment value and a fourth integral adjustment value corresponding to the fan according to the fourth proportional adjustment coefficient, the fourth integral adjustment coefficient and the fourth difference;

[0094] The sum of the fourth proportional adjustment value and the fourth integral adjustment value is determined as the adjustment frequency corresponding to the fan.

[0095] Specifically, in an embodiment of the present invention, as shown in Figure 4, the current wind speed of the fan is obtained in real time through the wind speed detector V1, and the difference between the current wind speed and the set wind speed is determined. According to the corresponding relationship between the wind speed and frequency of the fan, and according to the fourth proportional adjustment coefficient (KP4), the fourth integral adjustment coefficient (KI4) and the fourth difference, the fourth proportional adjustment value and the fourth integral adjustment value of the heating pipe valve are calculated; the sum of the fourth proportional adjustment value and the fourth integral adjustment value is determined as the adjustment frequency PI4 of the fan.

[0096] Here, the above adjustment frequency is calculated including but not limited to using formula (4).

[0097] Among them, PI4(t) is the adjustment frequency corresponding to the current moment, e(t) is the fourth difference corresponding to the current moment, KP4 is the fourth proportional adjustment coefficient, KI4 is the fourth integral adjustment coefficient, is the cumulative value of the integral from the start time to the current time e(t). KP4*e(t) is the fourth proportional adjustment value corresponding to the current time, is the fourth integral adjustment value corresponding to the current moment.

[0098] In the embodiment of the present application, based on the proportional and integral algorithm, as well as the wind speed difference between the current wind speed and the target wind speed, the operating frequency of the control fan can be accurately obtained to ensure that the wind speed meets the production requirements of the oven, and the fan can adjust the frequency operation according to demand.

[0099] Based on the above embodiment, in one or more embodiments of the present application, as shown in FIG4 , the control method of the drying device further includes:

[0100] 1. Control of valve opening of heat coil heating pipe

[0101] 1. The temperature inside the oven is collected through the temperature probe (temperature sensor) T3. The number of temperature probes can be set according to the production requirements;

[0102] 2. Compare the temperature collected by the temperature probe with the temperature set by the PLC;

[0103] 3. Output PI value PI1 according to the temperature comparison result;

[0104] 4. Use thermometer T1 to collect the temperature of the heating pipe of the coating oven heat source (steam / thermal oil); use thermometer T2 to collect the temperature of the heat source (condensate / thermal oil) recovery pipe;

[0105] 5. Subtract the recovery pipe temperature T2 from the heating pipe temperature T1 to obtain the difference ΔT;

[0106] 6. Compare the temperature difference ΔT with the set temperature difference;

[0107] 7. Output PI value PI2 according to the temperature difference comparison result;

[0108] 8. Compare PI1 and PI2 and take the minimum PI value between the two;

[0109] 9. Control the opening of the heat coil heating pipe valve according to the output minimum PI value.

[0110] In an embodiment of the present application, the difference between the thermometer of the condensate return pipe / thermal oil return pipe of the oven heating plate and the thermometer of the steam supply pipe / thermal oil supply pipe of the heating plate is increased, and the temperature is detected by the temperature probe in the oven. By comparing the PI values, the smallest PI value is selected to control the valve opening of the steam supply pipe / thermal oil supply pipe to ensure a large temperature difference between the supply and return pipes, which can effectively save energy.

[0111] 2. Automatic adjustment control of exhaust air valve and return air valve opening

[0112] 1. The NMP concentration in the coating oven is collected through NMP concentration probes C1 and C2, and the maximum concentration at each collection point is taken; in the embodiment of the present application, the corresponding number of concentration probes can be selected and set in the oven according to production requirements.

[0113] 2. Compare the maximum concentration with the concentration value set by PLC;

[0114] 3. Output PI value PI3 according to the concentration comparison result;

[0115] 4. Control the corresponding opening of the air valve (exhaust air valve or return air valve) according to the output PI3. It should be noted here that the opening of the exhaust air valve is directly proportional to the PI value; the opening of the return air valve is inversely proportional to the PI value.

[0116] In the embodiment of the present application, the opening of the exhaust air valve and the return air valve is controlled by a solvent concentration probe inside the oven, so as to reduce the heat loss of the hot air within the concentration control range, thereby achieving efficient energy saving.

[0117] 3. Automatic adjustment and control of fan frequency

[0118] 1. Collect the wind speed of the fan according to the wind speed detector;

[0119] 2. Compare the collected wind speed with the wind speed set by PLC;

[0120] 3. Output PI value PI4 according to the wind speed comparison result;

[0121] 4. Control the fan operating frequency according to the output PI4 value.

[0122] In an embodiment of the present application, a wind speed sensor is added to the fan outlet, and the fan operating frequency is controlled by the detected wind speed to ensure that the wind speed meets the production requirements of the oven, so that the fan can adjust its operating frequency as required.

[0123] An embodiment of the present invention further provides a control device for a drying device, which is used to execute the control method for the drying device provided in the above embodiments. As shown in FIG5 , the device includes:

[0124] a first determining unit, for determining a first opening adjustment value of a heating pipe valve of the drying device according to a current temperature in the oven and a target temperature;

[0125] a second determining unit, configured to determine a second opening adjustment value of the heating pipe valve according to the temperature of the heating pipe and the temperature of the heat source recovery pipe of the drying equipment;

[0126] The first control unit is used to control the opening of the heating pipe valve based on the minimum value of the first opening adjustment value and the second opening adjustment value.

[0127] In the technical solution of the embodiment of the present invention, an adjustment value of the heating pipe valve opening is obtained according to the current temperature in the oven and the set target temperature, and another adjustment value of the heating pipe valve opening is determined by the temperature of the passing heating pipe and the temperature of the heat source recovery pipe. Then, the smallest value of the two is taken as the opening of the heating pipe valve. This not only improves the drying efficiency and drying adjustment effect, but also controls the heat source flow of the heating pipe with the minimum adjustment value, thereby saving energy while increasing the production capacity of battery coating.

[0128] In one or more embodiments of the present application, the first determining unit includes:

[0129] a first determining module, configured to determine a first difference between a current temperature in the oven and a target temperature;

[0130] a first calculation module, configured to calculate a first proportional adjustment value and a first integral adjustment value of the heating pipe valve according to a first proportional adjustment coefficient, a first integral adjustment coefficient and the first difference;

[0131] The second determining module is configured to determine the sum of the first proportional adjustment value and the first integral adjustment value as the first opening adjustment value.

[0132] In one or more embodiments of the present application, the second determining unit includes:

[0133] a third determining module, configured to determine a temperature difference between the temperature of the heat supply pipe and the temperature of the heat source recovery pipe, and to determine a second difference between the temperature difference and the target temperature;

[0134] a second calculation module, configured to calculate a second proportional adjustment value and a second integral adjustment value of the heating pipe valve according to a second proportional adjustment coefficient, a second integral adjustment coefficient and the second difference;

[0135] The fourth determining module is configured to determine the sum of the second proportional adjustment value and the second integral adjustment value as the second opening adjustment value.

[0136] In one or more embodiments of the present application, the control device of the drying equipment further includes:

[0137] a first acquiring unit, configured to acquire the internal temperature of the oven detected by a plurality of temperature detectors, wherein the plurality of temperature detectors are arranged at different positions in the oven;

[0138] The third determining unit is configured to use an average value of the obtained multiple internal temperatures as the current temperature in the drying device.

[0139] In one or more embodiments of the present application, the control device of the drying equipment further includes:

[0140] a fourth determining unit, configured to determine a third opening adjustment value corresponding to the air valve of the drying device according to the current concentration of the target solvent material in the drying device and the target concentration;

[0141] The second control unit is used to control the opening of the air valve based on the third opening adjustment value.

[0142] In one or more implementations of the present application, the fourth determining unit includes:

[0143] a fifth determining module, configured to determine a third difference between the current concentration of the target solvent material and the target concentration;

[0144] a sixth determining module, configured to determine a third proportional adjustment value and a third integral adjustment value of the opening of the air valve according to a third proportional adjustment coefficient, a third integral adjustment coefficient and the third difference;

[0145] A seventh determining module is configured to determine the sum of the third proportional adjustment value and the third integral adjustment value as the third opening adjustment value.

[0146] In one or more embodiments of the present application, the air valve includes an exhaust air valve and a return air valve, and the second control unit includes:

[0147] The first control module is used to control the opening of the exhaust air valve or the opening of the return air valve based on the third opening adjustment value; wherein the sum of the opening of the exhaust air valve and the opening of the return air valve is equal to the preset opening.

[0148] In one or more embodiments of the present application, the control device of the drying equipment further includes:

[0149] a second acquiring unit, configured to acquire a detection concentration of a target solvent material detected by a plurality of concentration detectors, wherein the plurality of concentration detectors are arranged at different positions in the oven;

[0150] The fifth determining unit is configured to use the maximum value of the multiple detected concentrations as the current concentration of the target solvent material.

[0151] In one or more embodiments of the present application, the control device of the drying equipment further includes:

[0152] a sixth determining unit, configured to determine an adjustment frequency corresponding to the fan in the drying device according to a current wind speed and a target wind speed of the fan, wherein the fan is configured to supply air to a heating coil of the drying device;

[0153] A third control unit is configured to control the wind speed of the fan based on the adjustment frequency.

[0154] In one or more implementations of the present application, the sixth determining unit includes:

[0155] an eighth determining module, configured to determine a fourth difference between a current wind speed of the wind turbine and a target wind speed;

[0156] a ninth determining module, configured to determine a fourth proportional adjustment value and a fourth integral adjustment value corresponding to the wind turbine according to the fourth proportional adjustment coefficient, the fourth integral adjustment coefficient, and the fourth difference;

[0157] The tenth determining module is configured to determine the sum of the fourth proportional adjustment value and the fourth integral adjustment value as the adjustment frequency corresponding to the fan.

[0158] In one or more embodiments, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including instructions. The above instructions can be executed by a battery processor to complete the control method of the above drying equipment, the method comprising: determining a first opening adjustment value of the heating pipe valve of the drying equipment according to the current temperature and the target temperature in the oven; determining a second opening adjustment value of the heating pipe valve according to the heating pipe temperature and the heat source recovery pipe temperature of the drying equipment; and controlling the opening of the heating pipe valve based on the minimum value of the first opening adjustment value and the second opening adjustment value. Optionally, the above instructions can also be executed by the processor of the battery to complete the other steps involved in the above exemplary embodiments. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0159] In an exemplary embodiment, an application / computer program product is also provided, comprising one or more instructions that can be executed by a processor of a battery to implement the aforementioned drying device control method. The method comprises: determining a first opening adjustment value for a heat supply pipe valve of the drying device based on a current oven temperature and a target temperature; determining a second opening adjustment value for the heat supply pipe valve based on the temperature of the heat supply pipe and the temperature of a heat recovery pipe of the drying device; and controlling the opening of the heat supply pipe valve based on the minimum of the first and second opening adjustment values. Optionally, the aforementioned instructions can also be executed by the processor of the battery to implement other steps involved in the aforementioned exemplary embodiment. Figure 6 is an exemplary diagram of a drying device 600. Drying device 600 may include electronic devices such as a controller, a motor controller, a domain controller, or other electronic devices within an electrical device. Those skilled in the art will appreciate that schematic diagram 6 is merely an example of drying device 600 and does not limit the drying device 600. Drying device 600 may include more or fewer components than shown, or a combination of certain components, or different components. For example, drying device 600 may also include input / output devices, network access devices, buses, etc.

[0160] The processor 602 may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. The processor 602 is the control center of the drying device 600 and connects various parts of the drying device 600 using various interfaces and lines.

[0161] Memory 601 can be used to store computer-readable instructions. Processor 602 implements various functions of drying device 600 by running or executing the computer-readable instructions or modules stored in memory 601 and accessing data stored in memory 601. Memory 601 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as sound playback or image playback); the data storage area may store data generated based on the use of electronic device 600. Furthermore, memory 601 may include a hard disk, internal memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, a read-only memory (ROM), a random access memory (RAM), or other non-volatile or volatile storage devices.

[0162] If the integrated modules of the drying device 600 are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the present invention can implement all or part of the processes in the above-mentioned method embodiments by instructing the relevant hardware to perform the processes through computer-readable instructions. The computer-readable instructions can be stored in a computer-readable storage medium, and when executed by a processor, the computer-readable instructions can implement the steps of each of the above-mentioned method embodiments.

[0163] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0164] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

[0165] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

Claims

1. A control method for a drying device, wherein: include: Determining a first opening adjustment value of a heating pipe valve of the drying device according to the current temperature in the oven and the target temperature; Determining a second opening adjustment value of the heating pipe valve according to the temperature of the heating pipe and the temperature of the heat source recovery pipe of the drying equipment; Based on the minimum value between the first opening adjustment value and the second opening adjustment value, the opening of the heating pipe valve is controlled.

2. The method according to claim 1, wherein: The step of determining the first opening adjustment value of the heating pipe valve of the drying device according to the current temperature in the oven and the target temperature includes: determining a first difference between a current temperature in the oven and a target temperature; Calculating a first proportional adjustment value and a first integral adjustment value of the heating pipe valve according to a first proportional adjustment coefficient, a first integral adjustment coefficient and the first difference; The sum of the first proportional adjustment value and the first integral adjustment value is determined as the first opening adjustment value.

3. The method according to claim 1 or 2, wherein: Determining the second opening adjustment value of the heating pipe valve according to the temperature of the heating pipe and the temperature of the heat source recovery pipe of the drying equipment includes: Determining a temperature difference between the temperature of the heat supply pipeline and the temperature of the heat source recovery pipeline, and determining a second difference between the temperature difference and the target temperature; Calculating a second proportional adjustment value and a second integral adjustment value of the heating pipe valve according to the second proportional adjustment coefficient, the second integral adjustment coefficient and the second difference; The sum of the second proportional adjustment value and the second integral adjustment value is determined as the second opening adjustment value.

4. The method according to any one of claims 1 to 3, wherein: The method further comprises: Acquiring the internal temperature of the oven detected by a plurality of temperature detectors, wherein the plurality of temperature detectors are arranged at different positions in the oven; The average value of the multiple internal temperatures obtained is used as the current temperature in the drying device.

5. The method according to any one of claims 1 to 4, wherein: The method further comprises: Determining a third opening adjustment value corresponding to the air valve of the drying device according to the current concentration of the target solvent material in the oven and the target concentration; The opening of the air valve is controlled based on the third opening adjustment value.

6. The method according to claim 5, wherein: The determining, according to the current concentration and the target concentration of the target solvent material in the oven, a third opening adjustment value corresponding to the air valve of the drying device comprises: determining a third difference between a current concentration of the target solvent material and a target concentration; Determining a third proportional adjustment value and a third integral adjustment value of the opening of the air valve according to a third proportional adjustment coefficient, a third integral adjustment coefficient and the third difference; The sum of the third proportional adjustment value and the third integral adjustment value is determined as the third opening adjustment value.

7. The method according to claim 5 or 6, wherein: The air valve comprises an exhaust air valve and a return air valve, and the controlling the opening of the air valve based on the third opening adjustment value comprises: The opening of the exhaust air valve or the opening of the return air valve is controlled based on the third opening adjustment value; wherein the sum of the opening of the exhaust air valve and the opening of the return air valve is equal to a preset opening.

8. The method according to any one of claims 5 to 7, wherein: The method further comprises: acquiring a detection concentration of a target solvent material detected by a plurality of concentration detectors, wherein the plurality of concentration detectors are arranged at different positions in the oven; The maximum value of the multiple detected concentrations is taken as the current concentration of the target solvent material.

9. The method according to any one of claims 1 to 8, wherein: The method further comprises: According to the current wind speed and target wind speed of the fan in the drying equipment, the adjustment frequency corresponding to the fan is determined; wherein the fan is used to supply air to the heating coil of the drying equipment; The wind speed of the fan is controlled based on the adjustment frequency.

10. The method according to claim 9, wherein: The step of determining the adjustment frequency corresponding to the fan according to the current wind speed and the target wind speed of the fan in the drying device comprises: Determining a fourth difference between a current wind speed of the wind turbine and a target wind speed; Determine a fourth proportional adjustment value and a fourth integral adjustment value corresponding to the fan according to a fourth proportional adjustment coefficient, a fourth integral adjustment coefficient and the fourth difference; The sum of the fourth proportional adjustment value and the fourth integral adjustment value is determined as the adjustment frequency corresponding to the fan.

11. A control device for drying equipment, wherein: include: A first determining unit, which determines a first opening adjustment value of a heating pipe valve of the drying device according to a current temperature in the oven and a target temperature; A second determining unit, configured to determine a second opening adjustment value of the heating pipe valve according to a temperature of a heating pipe and a temperature of a heat source recovery pipe of the drying device; The first control unit is used to control the opening of the heating pipe valve based on the minimum value of the first opening adjustment value and the second opening adjustment value.

12. A drying device, comprising a memory and a processor, wherein: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 10 through the computer program.

13. A computer-readable storage medium, wherein: The computer-readable storage medium includes a stored program, wherein the program executes the method described in any one of claims 1 to 10 when executed.

Images