Electric heating box for coil preheating, control method, electronic equipment, storage medium and program product

Abstract

The invention provides an electric heating box for coil preheating, a control method, electronic equipment, a storage medium and a program product, the electric heating box is used for heating a coil in a coil preheating process, and the electric heating box comprises a box body, an electric heating device and a control device; the box body is used for containing the coil and providing a heat insulation environment for the coil; the electric heating device is electrically connected with the coil and is used for introducing current into the coil and sending the characteristic information of the coil to the control device; and the control device is connected with the electric heating device and is used for receiving the characteristic information of the coil, determining the temperature of the coil according to the characteristic information of the coil and controlling the electric heating device to introduce current into the coil so as to heat the coil until the temperature of the coil reaches the target temperature. According to the scheme, the over-temperature risk in the coil heating process can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of coil preheating, and in particular to an electric heating box, a control method, an electronic device, a storage medium and a program product for coil preheating. Background Art

[0002] In the process of producing dry-type transformers, the high-voltage coil (hereinafter referred to as the coil) of the dry-type transformer is usually cast to achieve insulation protection for the coil. In order to facilitate casting, the coil must be heated before casting.

[0003] At present, the coil is generally heated by a hot air oven. Specifically, the coil is first placed in the hot air oven, and then the hot air oven is controlled to heat the air inside the hot air oven, so that the coil in the hot air oven can be heated by the hot air in the hot air oven. In the process of heating the coil, since the coil is a wound coil, it is impossible to place a temperature sensor in the coil. Therefore, an operator with relevant experience generally estimates the coil temperature based on the temperature detected by the temperature sensor installed on the inner wall of the hot air oven to determine whether the coil has been heated.

[0004] However, since it takes a certain amount of time for the hot air in the hot air oven to begin to conduct heat to the coil and fully heat the coil, the temperature change of the coil may be small or even no change when the temperature detected by the temperature sensor changes greatly. In addition, since the hot air in the hot air oven is relatively unevenly distributed, there is an error between the temperature detected by the temperature sensor and the temperature of the air in contact with the coil. Therefore, the error in estimating the coil temperature based on the temperature detected by the temperature sensor is large, resulting in a greater risk of overheating during the heating process of the coil. Summary of the invention

[0005] In view of this, the present application provides an electric heating box, control method, electronic device, storage medium and program product for coil preheating, which can reduce the risk of overheating during the coil heating process.

[0006] In a first aspect, an embodiment of the present application provides an electric heating box for coil preheating, which is used to heat the coil in a coil preheating process, and the electric heating box comprises: a box body, an electric heating device and a control device; the box body is used to accommodate the coil and provide an insulating environment for the coil; the electric heating device is electrically connected to the coil, and is used to pass current to the coil and send characteristic information of the coil to the control device; the control device is connected to the electric heating device, and is used to receive the characteristic information of the coil, determine the temperature of the coil according to the characteristic information of the coil, and control the current passed by the electric heating device to the coil, so that the coil is heated until the temperature of the coil reaches the target temperature.

[0007] In a second aspect, an embodiment of the present application also provides a control method, comprising: after electrically connecting the coil to an electric heating device included in an electric heating box and installing the coil into a box included in the electric heating box, controlling the electric heating device to pass current to the coil, and controlling the electric heating device to send characteristic information of the coil to a control device included in the electric heating box, wherein the box provides a heat-insulating environment for the coil; receiving the characteristic information of the coil through the control device, determining the temperature of the coil based on the characteristic information of the coil, and controlling the current passed through the coil by the electric heating device so that the coil is heated until the temperature of the coil reaches a target temperature, wherein the control device is connected to the electric heating device.

[0008] In the third aspect, an embodiment of the present application also provides an electronic device, comprising: a processor, a memory, a communication interface and a bus, wherein the processor, the memory and the communication interface communicate with each other through the bus; the memory is used to store at least one executable instruction, and the executable instruction enables the processor to perform operations corresponding to the control method described in the second aspect above.

[0009] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which computer instructions are stored. When the computer instructions are executed by a processor, the processor executes the control method as described in the second aspect above.

[0010] In a fifth aspect, an embodiment of the present application further provides a computer program product, which is tangibly stored on a computer-readable medium and includes computer-executable instructions, which, when executed, enable at least one processor to perform the control method as described in the second aspect above.

[0011] In the embodiment of the present application, in the process of heating the coil, the coil to be heated is first installed in the box, and the coil is electrically connected to the electric heating device, and then the control device controls the electric heating device to pass current to the coil, so that the temperature of the coil gradually increases, thereby heating the coil. At the same time, since the coil has been passed with current at this time, the electric heating device can detect the characteristic information of the coil, so that the control device can determine the temperature of the coil according to the characteristic information of the coil, and monitor whether the temperature of the coil reaches the target temperature. Therefore, compared with estimating the temperature of the coil according to the temperature detected by the temperature sensor installed on the inner wall of the hot air oven, the temperature of the coil is determined directly by the characteristic information of the coil itself in the present application, so that the characteristic information of the coil changes with the temperature of the coil in almost real time, which reduces the detection error of the temperature of the coil and reduces the risk of overheating during the heating of the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a cross-sectional view of an electric heating box according to an embodiment of the present application;

[0013] Figure 2 is a schematic diagram of an electric heating box according to an embodiment of the present application;

[0014] Figure 3 is a cross-sectional view of an electric heating box according to another embodiment of the present application;

[0015] Figure 4 is a cross-sectional view of an electric heating box according to another embodiment of the present application;

[0016] Figure 5 is a flow chart of a control method provided by an embodiment of the present application;

[0017] Figure 6 It is a schematic diagram of an electronic device provided by an embodiment of the present application.

[0018] List of reference numerals:

[0019] DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0021] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] As mentioned above, in the process of producing dry-type transformers, the high-voltage coil (hereinafter referred to as the coil) of the dry-type transformer must be heated before pouring. At present, the coil is generally heated by a hot air oven, specifically, the coil is first placed in the hot air oven, and then the hot air oven is controlled to heat the air inside it, and then the hot air in the hot air oven can be used to heat the coil in the hot air oven. In the process of heating the coil, since the coil is a wound coil, it is impossible to place a temperature sensor in the coil. Therefore, an operator with relevant experience generally estimates the coil temperature based on the temperature detected by the temperature sensor installed on the inner wall of the hot air oven to determine whether the coil has been heated. However, since it takes a certain amount of time for the hot air in the hot air oven to start heat conduction to the coil and fully heat the coil, the temperature change of the coil is small or even no change when the temperature detected by the temperature sensor changes greatly. Since the hot air in the hot air oven is relatively unevenly distributed, there is an error between the temperature detected by the temperature sensor and the temperature of the air in contact with the coil. Therefore, the error in estimating the coil temperature based on the temperature detected by the temperature sensor is large, resulting in a large risk of overheating in the process of heating the coil.

[0023] In the embodiment of the present application, during the process of heating the coil, the coil to be heated is first installed in the box, and the coil is electrically connected to the electric heating device, and then the control device controls the electric heating device to pass current to the coil, so that the temperature of the coil gradually increases, thereby heating the coil. At the same time, since the coil has been passed with current at this time, the electric heating device can detect the characteristic information of the coil, so that the control device can determine the temperature of the coil according to the characteristic information of the coil, and monitor whether the temperature of the coil reaches the target temperature. Therefore, compared with estimating the temperature of the coil according to the temperature detected by the temperature sensor installed on the inner wall of the hot air oven, the temperature of the coil is determined directly by the characteristic information of the coil itself in the present application, so that the characteristic information of the coil changes with the temperature of the coil in almost real time, which reduces the detection error of the temperature of the coil and reduces the risk of overheating during the heating of the coil.

[0024] The following is a detailed description of an electric heating box, control method, electronic device, storage medium and program product for coil preheating provided in an embodiment of the present application in conjunction with the accompanying drawings.

[0025] Electric heating box for coil preheating

[0026] Figure 1 is a cross-sectional view of an electric heating box according to an embodiment of the present application. Figure 2 Schematic diagram of an electric heating box according to an embodiment of the present application. The electric heating box provided in the embodiment of the present application is used to heat the coil in the coil preheating process, such as Figure 1 and Figure 2 As shown, the electric heating box comprises: a box body 1, an electric heating device 2 and a control device 5;

[0027] Box 1 is used to contain the coil and provide a heat-insulating environment for the coil;

[0028] The electric heating device 2 is electrically connected to the coil and is used to pass current into the coil and send the characteristic information of the coil to the control device 5 after detecting the characteristic information of the coil;

[0029] The control device 5 is connected to the electric heating device 2, and is used to receive characteristic information of the coil, determine the temperature of the coil based on the characteristic information of the coil, and control the current passed into the coil by the electric heating device 2 so that the coil is heated until the temperature of the coil reaches the target temperature.

[0030] The characteristic information of the coil changes as the current of the coil changes.

[0031] In the embodiment of the present application, in the process of heating the coil, the coil to be heated is first installed in the box 1, and the coil is electrically connected to the electric heating device 2, and then the control device 5 controls the electric heating device 2 to pass current to the coil, so that the temperature of the coil gradually increases, thereby heating the coil. At the same time, since the coil has been passed with current at this time, the electric heating device 2 can detect the characteristic information of the coil, so that the control device 5 can determine the temperature of the coil according to the characteristic information of the coil, and monitor whether the temperature of the coil reaches the target temperature. Therefore, compared with estimating the temperature of the coil according to the temperature detected by the temperature sensor installed on the inner wall of the hot air oven, the temperature of the coil is determined directly by the characteristic information of the coil itself in the present application, so that the characteristic information of the coil changes with the temperature of the coil in almost real time, which reduces the detection error of the temperature of the coil and reduces the risk of overheating during the heating of the coil.

[0032] It should be noted that in the embodiment of the present application, the coil may be installed in the box 1 first and then the coil is electrically connected to the electric heating device 2, or the coil may be connected to the electric heating device 2 first and then the coil is installed in the box 1. The embodiment of the present application is not limited to this.

[0033] Furthermore, compared to estimating the coil temperature based on the temperature detected by the temperature sensor installed on the inner wall of the hot air oven, the present application directly determines the coil temperature through the characteristic information of the coil itself, which can also reduce the experience requirements for the operator, reduce the risk of operation failure, reduce the work intensity of on-site personnel, and improve work efficiency. In addition, the present application can also significantly improve the efficiency of the coil preheating process, reduce the production energy consumption of the coil preheating process, improve the space utilization rate of the factory workshop, and make the temperature distribution of the coil more uniform during the heating process of the coil, so as to improve the quality of the coil.

[0034] In addition, the box body 1 provides a heat-insulating environment for the coil, which can reduce the heat dissipation of the coil and improve the efficiency of the electric heating device 2 in heating the coil.

[0035] Optionally, the coil is a high voltage coil in a dry-type transformer.

[0036] Optionally, the target temperature is within a temperature range of 83.5 degrees Celsius to 86.5 degrees Celsius, for example, the target temperature is 85 degrees Celsius, and the allowable error range of the target temperature is ±1 degree Celsius or ±1.5 degrees Celsius, etc.

[0037] Alternatively, if Figure 1 As shown, a door 11 may be provided on one side of the box 1, and a switch device 12 for controlling the door 11 to be opened and closed relative to the box 1 is connected to the box 1. In a specific example, the box 1 is horizontally arranged, and the door 11 is slidably connected relative to the box 1 in the vertical direction. The switch device 12 may include a fall arrester and a double hook hoist, etc., which is not limited in the embodiment of the present application. Based on this, before the coil is installed in the box 1, the switch device 12 can be used to control the door 11 to be opened relative to the box 1, and after the coil is installed in the box 1, the switch device 12 can be used to control the door 11 to be closed relative to the box 1.

[0038] Figure 3 is a cross-sectional view of an electric heating box according to another embodiment of the present application. Figure 3 As shown, a hot air device 3 is provided on the box body 1; the hot air device 3 is used to heat the air in the box body 1 and make the air in the box body 1 circulate.

[0039] In the embodiment of the present application, when the electric heating box electrically heats the coil in the box body 1, the hot air device 3 can heat the air in the box body 1 and circulate the air in the box body 1. Thus, the hot air device 3 can keep the air in the box body 1 in a relatively hot state, improving the heat insulation effect of the box body 1, and at the same time, can make the heat distribution of the air in the box body 1 more uniform, further improving the heat insulation effect of the box body 1.

[0040] In one possible implementation, Figure 3 As shown, the hot air device 3 includes a gas passage 31, a driving member 32 and a heating member 33; the gas passage 31 includes an air inlet 311 and an air outlet 312, and the air inlet 311 and the air outlet 312 are both connected to the box body 1; the driving member 32 (such as a fan, etc.) is used to drive the air in the box body 1 to flow from the air inlet 311 to the gas passage 31, and drive the air in the gas passage 31 to flow from the air outlet 312 to the box body 1 (the specific gas flow direction in the box body 1 and the gas passage 31 can be seen Figure 3); a heating element 33 (such as a heating wire or a shell and tube heater, etc.) is arranged on the inner wall of the gas passage 31 to heat the air flowing through the gas passage 31.

[0041] In the embodiment of the present application, when the electric heating box electrically heats the coil in the box 1, the driving member 32 can drive the air in the box 1 to flow from the air inlet 311 of the gas passage 31 into the gas passage 31, and can also drive the air in the gas passage 31 to flow from the air outlet 312 of the gas passage 31 into the box 1, and the heating member 33 in the gas passage 31 can heat the air flowing through the gas passage 31, so that the air in the box 1 is heated and the air in the box 1 can circulate. Therefore, by providing the gas passage 31 and the heating member 33 in the gas passage 31, as well as the driving member 32, it is possible to heat the air in the box 1 and circulate the air in the box 1, with a simple structure and low cost.

[0042] In one possible implementation, Figure 3 As shown, the gas passage 31 is disposed in the box body 1 , for example, the gas passage 31 is a flat passage fixedly connected to the inner wall of the box body 1 .

[0043] In the embodiment of the present application, the gas passage 31 is arranged inside the box body 1. Therefore, compared with setting the gas passage 31 outside the box body 1, the air in the gas passage 31 arranged inside the box body 1 dissipates less heat, thereby improving the efficiency of heating the air in the box body 1 and saving energy.

[0044] In one possible implementation, Figure 3 As shown, the air inlet 311 is located above the air outlet 312 in the vertical direction. Therefore, in the process of using the electric heating box to electrically heat the coil in the box body 1, the driving member 32 will drive the air in the gas passage 31 to flow from top to bottom, so that the heated hot air in the gas passage 31 enters the box body 1 from a lower position. Since hot air will flow from bottom to top in a natural state, compared with hot air entering the box body 1 from a higher position, in this application, hot air enters the box body 1 from a lower position, which can make the hot air in the box body 1 flow more fully and evenly in the box body 1, thereby improving the thermal insulation effect of the box body 1.

[0045] In one possible implementation, the hot air device 3 also includes a control component; the control component (such as a processor or a controller, etc.) is used to control the heating component 33 to heat the air flowing through the gas passage 31 when the temperature of the coil is lower than a temperature threshold, so that the temperature of the air in the box 1 is equal to the target temperature, and to control the heating component 33 to heat the air flowing through the gas passage 31 when the temperature of the coil is equal to the temperature threshold, so that the temperature of the air in the box 1 is equal to the temperature threshold, and to control the heating component 33 to heat the air flowing through the gas passage 31 when the temperature of the coil is higher than the temperature threshold, so that the temperature of the air in the box 1 is positively correlated with the temperature of the coil, wherein the temperature threshold is lower than the target temperature.

[0046] The temperature threshold may be within a temperature range of 55 degrees Celsius to 75 degrees Celsius, for example, the temperature threshold may be 65 degrees Celsius.

[0047] In a specific embodiment, a temperature sensor can be set on the inner wall of the box body 1. In the process of using the electric heating box to electrically heat the coil in the box body 1, the temperature of the coil will gradually increase. When the temperature of the coil is lower than the temperature threshold (for example, 65 degrees Celsius), the control component controls the heating capacity of the heating component 33 so that the temperature detected by the temperature sensor is equal to the target temperature (for example, 85 degrees Celsius). When the temperature of the coil increases to equal the temperature threshold, the control component controls the heating capacity of the heating component 33 so that the temperature detected by the temperature sensor is equal to the temperature threshold. When the temperature of the coil increases to greater than the temperature threshold, the control component controls the heating capacity of the heating component 33 so that the temperature detected by the temperature sensor increases with the increase of the coil. For example, when it is detected that the temperature of the coil reaches a certain temperature, the control component controls the heating capacity of the heating component 33 so that the temperature detected by the temperature sensor reaches that temperature.

[0048] In the embodiment of the present application, when the temperature of the coil is low, the temperature of the air in the box 1 will be higher to accelerate the heating of the coil. When the temperature of the coil is high, the temperature of the air in the box 1 will increase with the increase of the temperature of the coil to provide a thermal insulation environment with better insulation effect for the coil.

[0049] In one possible implementation, Figure 1 As shown, the electric heating box also includes a transport device 4; the transport device 4 is used to carry the coil and drive the coil to move between the inside and outside of the box body 1 according to the received action command, for example Figure 1 In the transport device 4 shown, the coil can be loaded on the top of the transport device 4, so that the transport device 4 can drive the coil to move between the inside and outside of the box body 1 according to the received action instructions.

[0050] In a specific embodiment, Figure 1As shown, the bottom of the box body 1 can be open, the transport device 4 can be a plate-shaped object with rollers, the transport device 4 is slidably connected to the box body 1 at the bottom opening of the box body 1, and the transport device 4 can be provided with a brake member 41 (for example, a brake member 41 including a gear, a chain and a motor, etc.) for driving the transport device 4 to slide relative to the box body 1. The action instruction can be generated by the industrial computer 52 according to the operator's click operation on the industrial computer 52.

[0051] Based on this, when the coil to be heated is installed in the box 1, the box door 11 is first opened relative to the box 1, and then the operator can first click the first touch key on the industrial computer 52 to make the transport device 4 slide relative to the box 1 to a position away from the box 1. For example, at this time, the electric heating box is in the following Figure 4 The operator then installs the coil on the transport device 4. At this time, the coil is outside the box 1. After the coil is installed on the transport device 4, the operator clicks the second touch key on the industrial computer 52 to slide the transport device 4 relative to the box 1 to the position of blocking the bottom opening of the box 1. At this time, the coil is inside the box 1. For example, the electric heating box is in the state shown in FIG. Figure 1 In the state shown, the box door 11 is finally closed relative to the box body 1, and the coil to be heated is installed in the box body 1.

[0052] In the embodiment of the present application, the transport device 4 is used to drive the coil to move between the inside and outside of the box 1 according to the received action instructions, so that the coil can be automatically installed into the box 1 and automatically removed from the box 1. Compared with the operator carrying the coil into the box 1 to install and remove the coil, the risk of burns to the operator can be reduced, and manual operation can also be reduced.

[0053] In one possible implementation, Figure 1 As shown, the portion of the electric heating device 2 for electrically connecting to the coil is arranged on the transport device 4 .

[0054] In a specific embodiment, Figure 1 As shown, the electric heating device 2 may include a support frame 21 and two connection cables ( Figure 3 The support frame 21 is hidden in the figure), based on this, the support frame 21 is set on the transportation device 4, and the wiring cable can be set on the support frame 21.

[0055] Therefore, when the coil is installed on the transport device 4, not only can the coil be relatively fixed on the transport device 4, but the electrical connection between the electric heating device 2 and the coil can also be completed. After the coil enters the box body 1, the coil can be directly heated without the need to connect the electric heating device 2 to the coil. The operation is convenient and quick.

[0056] Optionally, the electric heating device 2 may further include a power supply, and both of the two wiring cables are connected to the power supply. After the two wiring cables are connected to the coil, the power supply and the coil are connected in series to provide power to the heating coil; Figure 2 As shown, the power supply may be a power cabinet 23, which may be disposed behind the box. Optionally, the power cord of the power cabinet 23 may be pre-buried underground, thereby reducing the risk of electric shock caused by exposed power cords.

[0057] Optionally, a resistor may be connected in series between the connection cable and the power supply, which is not limited in the embodiment of the present application.

[0058] In a possible implementation, the characteristic information includes the current passing through the coil and the voltage difference across the coil, that is, the electric heating device 2 is also used to detect the current passing through the coil and the voltage difference across the coil.

[0059] In a specific embodiment, the electric heating device 2 may also include a testing mechanism, which includes an ammeter and a voltmeter; the ammeter is connected in series between the wiring cable and the power supply, and after the two wiring cables are connected to the coil, the ammeter and the coil are connected in parallel; the voltmeter is also connected to two wires respectively connected to the two ends of the coil, and after the two wires are connected to the coil, the voltmeter and the coil are connected in parallel, and the two wires may also be set on the aforementioned support frame 21; Figure 2 As shown, the above-mentioned testing mechanism can be a testing cabinet 22 as shown in Figure 4. Optionally, a resistor can be connected in series between the voltmeter and the wire, which is not limited in the embodiment of the present application.

[0060] Based on this, the control device 5 is also used to determine the resistance of the coil according to the characteristic information, and determine the temperature of the coil according to the resistance of the coil. For example, the ratio of the voltage difference across the coil to the current passing through the coil can be determined as the resistance of the coil, and the temperature of the coil can be determined according to the resistance of the coil.

[0061] Furthermore, since the resistance of the coil changes with the temperature of the coil, the temperature of the coil can be determined based on the resistance of the coil. For example, when determining the temperature of the target coil based on the resistance of the target coil, the relationship between the temperature and resistance of a coil of the same model as the target coil (i.e., a coil with the same size and material as the target coil) can be obtained. Based on the relationship and the resistance of the target coil, the temperature of the target coil can be determined.

[0062] In the embodiment of the present application, when the control device 5 obtains the resistance of the coil, the electric heating device 2 detects the current passing through the coil and the voltage difference between the two ends of the coil, and sends the current and voltage difference to the control device 5, and then the control device 5 determines the resistance of the coil according to the current and voltage difference. Therefore, compared with the electric heating device 2 directly using an ohmmeter to detect the resistance of the coil, the present application determines the resistance of the coil by the current of the coil and the voltage difference between the two ends of the coil, which can reduce the detection error of the resistance of the coil caused by the resistance value of the wiring cable, etc., and improve the accuracy of the resistance of the coil obtained by the control device 5.

[0063] In a possible implementation, the control device 5 is also used to control the current passed into the coil of the electric heating device 2, so that after the coil is heated until the temperature of the coil reaches the target temperature, the temperature of the coil is maintained at the target temperature.

[0064] In the embodiment of the present application, after the electric heating device 2 heats the coil in the box 1 to the target temperature, it can also maintain the coil at the target temperature so that the temperature of the coil can still be maintained at the target temperature when the coil is to be cast.

[0065] In one possible implementation, the control device 5 is also used to control the electric heating device 2 to pass a current with a first current value to the coil when the temperature of the coil is lower than the target temperature, so that the temperature of the coil gradually increases, and to control the electric heating device 2 to pass a current with a second current value to the coil when the temperature of the coil is equal to the target temperature, so that the temperature of the coil is maintained at the target temperature, wherein the first current value is greater than the second current value.

[0066] Optionally, the current of the first current value can be a current that can increase the temperature of the coil at a preset temperature increase rate to reduce the possibility of damage to the coil. The first current value can be calculated based on the target temperature, the cross-sectional area, length and / or expansion coefficient of the coil, etc., and the embodiment of the present application is not limited to this. The temperature increase rate can be in the range of 0.5 degrees Celsius / minute to 2 degrees Celsius / minute. For example, the temperature increase rate can be 1 degree Celsius / minute.

[0067] Optionally, the second current value may be positively correlated with the first current value, for example, the second current value is 30% of the first current value.

[0068] In the embodiment of the present application, the control device 5 can control the electric heating device 2 to pass a current of a first current value to the coil when the temperature of the coil is lower than the target temperature, and control the electric heating device 2 to pass a current of a second current value to the coil when the temperature of the coil is equal to the target temperature, so that the temperature of the coil is maintained at the target temperature after increasing to the target temperature. Therefore, compared with adjusting the current value of the current passed into the coil in real time, the current value of the current passed into the coil in the present application is adjusted less times, the control logic is simple, and computing resources are saved.

[0069] Optionally, before controlling the electric heating device 2 to pass a current with a first current value into the coil, the control device 5 may first control the electric heating device 2 to pass a current with a third current value into the coil, so as to detect whether there is a circuit break or a circuit break in the path providing current to the coil, and detect whether there is an abnormality in the coil, for example, whether the resistance of the coil at this time is within a specified range, wherein the third current value is less than the first current value, and the third current value may be 15% to 35% of the first current value, for example, the third current value may be 20% or 30% of the first current value.

[0070] Alternatively, if Figure 2 As shown, the control device 5 may include a control cabinet 51 arranged outside the box body 1 and an industrial computer 52 arranged outside the box body 1, etc.; the control cabinet 51 can be used to control the heating capacity of the heating element 33, and / or obtain the temperature detected by the temperature sensor in the box body 1, etc. The control cabinet 51 and the above-mentioned test cabinet 22 can both be programmable logic controllers (PLCs), which are not limited to this in the embodiment of the present application; the industrial computer 52 can be a process monitoring system (Windows Control Center, WinCC), which is used to control the control cabinet 51 and the test cabinet 22, and perform calculations, etc., which are not limited to this in the embodiment of the present application; the control cabinet 51 and the test cabinet 22 can both be electrically connected to the industrial computer 52 by wired electrical connection or wireless connection, etc., and the embodiment of the present application does not limit the electrical connection method between the control cabinet 51 and the test cabinet 22 and the industrial computer 52.

[0071] Control Methods

[0072] Figure 5It is a flow chart of a control method provided by an embodiment of the present application. The control method provided by the embodiment of the present application is implemented by the electric heating box provided by the above embodiments. Unless otherwise specified, the box body, box door, switch device, electric heating device, support frame, test cabinet, power supply cabinet, hot air device, gas passage, air inlet, air outlet, drive component, heating component, transportation device, brake component, control device, control cabinet and industrial computer involved in the following method embodiments can be the box body 1, box door 11, switch device 12, electric heating device 2, support frame 21, test cabinet 22, power supply cabinet 23, hot air device 3, gas passage 31, air inlet 311, air outlet 312, drive component 32, heating component 33, transportation device 4, brake component 41, control device 5, control cabinet 51 and industrial computer 52 in the above embodiments respectively. See Figure 5 , the control method comprises the following steps:

[0073] 501. After the coil is electrically connected to the electric heating device included in the electric heating box and the coil is installed in the box included in the electric heating box, the electric heating device is controlled to pass current to the coil, and the electric heating device is controlled to send characteristic information of the coil to the control device included in the electric heating box.

[0074] The box provides a heat-insulating environment for the coil.

[0075] 502. The control device receives characteristic information of the coil, determines the temperature of the coil according to the characteristic information of the coil, and controls the current passed into the coil by the electric heating device so that the coil is heated until the temperature of the coil reaches the target temperature.

[0076] Wherein, the control device is connected with the electric heating device.

[0077] In the embodiment of the present application, during the process of heating the coil, the coil to be heated is first installed in the box, and the coil is electrically connected to the electric heating device, and then the control device controls the electric heating device to pass current to the coil, so that the temperature of the coil gradually increases, thereby heating the coil. At the same time, since the coil has been passed with current at this time, the electric heating device can detect the characteristic information of the coil, so that the control device can determine the temperature of the coil according to the characteristic information of the coil, and monitor whether the temperature of the coil reaches the target temperature. Therefore, compared with estimating the temperature of the coil according to the temperature detected by the temperature sensor installed on the inner wall of the hot air oven, the temperature of the coil is determined directly by the characteristic information of the coil itself in the present application, so that the characteristic information of the coil changes with the temperature of the coil in almost real time, which reduces the detection error of the temperature of the coil and reduces the risk of overheating during the heating of the coil.

[0078] It should be noted that the control method provided in the embodiment of the present application is implemented based on the electric heating box provided in the aforementioned embodiments. The specific implementation steps of the control method can be found in the description of the aforementioned electric heating box embodiments, and will not be repeated here.

[0079] Electronic devices

[0080] Figure 6 Schematic diagram of an electronic device provided by an embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the electronic device. Figure 6 The electronic device 600 provided in the embodiment of the present application includes: a processor 602, a communication interface 604, a memory 606, and a bus 608. Among them:

[0081] The processor 602 , the communication interface 604 , and the memory 606 communicate with each other via a bus 608 .

[0082] The communication interface 604 is used to communicate with other electronic devices or servers.

[0083] The processor 602 is used to execute the program 610, and specifically can execute the relevant steps in the above control method embodiment.

[0084] Specifically, the program 610 may include program codes, which include computer operation instructions.

[0085] The processor 602 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in the smart device may be processors of the same type, such as one or more CPUs; or may be processors of different types, such as one or more CPUs and one or more ASICs.

[0086] The memory 606 is used to store the program 610. The memory 606 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0087] The program 610 may be specifically used to enable the processor 602 to execute the control method in any of the aforementioned embodiments.

[0088] The specific implementation of each step in program 610 can refer to the corresponding description of the corresponding steps and units in the above control method embodiment, which will not be repeated here. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described devices and modules can refer to the corresponding process description in the above method embodiment, which will not be repeated here.

[0089] In the process of heating the coil by the electronic device of this embodiment, the coil to be heated is first installed in the box, and the coil is electrically connected to the electric heating device, and then the control device controls the electric heating device to pass current to the coil, so that the temperature of the coil gradually increases, thereby heating the coil. At the same time, since the coil has been passed with current at this time, the electric heating device can detect the characteristic information of the coil, so that the control device can determine the temperature of the coil according to the characteristic information of the coil, and monitor whether the temperature of the coil reaches the target temperature. Therefore, compared with estimating the temperature of the coil according to the temperature detected by the temperature sensor installed on the inner wall of the hot air oven, the temperature of the coil is directly determined by the characteristic information of the coil itself in this application, so that the characteristic information of the coil changes with the temperature of the coil in almost real time, which reduces the detection error of the temperature of the coil and reduces the risk of overheating during the heating of the coil.

[0090] Computer readable storage medium

[0091] The present application also provides a computer-readable storage medium storing instructions for causing a machine to execute the control method as described herein. Specifically, a system or device equipped with a storage medium may be provided, on which a software program code implementing the functions of any of the above embodiments is stored, and a computer (or CPU or MPU) of the system or device is enabled to read and execute the program code stored in the storage medium.

[0092] In this case, the program code read from the storage medium itself can implement the function of any one of the above embodiments, so the program code and the storage medium storing the program code constitute part of the present application.

[0093] The storage medium embodiments for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer via a communication network.

[0094] In addition, it should be clear that the functions of any of the above embodiments can be implemented not only by executing the program code read by the computer, but also by enabling an operating system operating on the computer to complete part or all of the actual operations based on instructions from the program code.

[0095] In addition, it can be understood that the program code read from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion module connected to the computer, and then based on the instructions of the program code, a CPU installed on the expansion board or expansion module is enabled to perform part or all of the actual operations, thereby realizing the functions of any of the above-mentioned embodiments.

[0096] Computer program product

[0097] The embodiment of the present application also provides a computer program product, which is tangibly stored on a computer-readable medium and includes computer executable instructions, which, when executed, cause at least one processor to execute the control methods provided in the above embodiments. It should be understood that each solution in this embodiment has the corresponding technical effects in the above method embodiment, which will not be repeated here.

[0098] It should be noted that not all steps and modules in the above-mentioned processes and device structure diagrams are necessary, and some steps or modules can be ignored according to actual needs. The execution order of each step is not fixed and can be adjusted as needed. The system structure described in the above-mentioned embodiments can be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or some components in multiple independent devices may be implemented together.

[0099] Nouns and pronouns relating to persons in this patent application are not limited to a specific gender.

[0100] In the above embodiments, the hardware module can be implemented mechanically or electrically. For example, a hardware module can include a permanent dedicated circuit or logic (such as a dedicated processor, FPGA or ASIC) to complete the corresponding operation. The hardware module can also include programmable logic or circuits (such as a general-purpose processor or other programmable processors), which can be temporarily set by software to complete the corresponding operation. The specific implementation method (mechanical method, or dedicated permanent circuit, or temporarily set circuit) can be determined based on cost and time considerations.

[0101] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the existence of other identical factors in the process, method, article or device including the elements.

[0102] Finally, it should be noted that the above are only preferred embodiments of the present invention, which are only used to illustrate the technical solution of the present invention, and are not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. An electric heating box for coil preheating, characterized in that: Used to heat the coil in the coil preheating process, the electric heating box comprises: a box body (1), an electric heating device (2) and a control device (5); The box (1) is used to accommodate the coil and provide a heat-insulating environment for the coil; The electric heating device (2) is electrically connected to the coil and is used to pass current through the coil and send characteristic information of the coil to the control device (5); The control device (5) is connected to the electric heating device (2) and is used to receive characteristic information of the coil, determine the temperature of the coil based on the characteristic information of the coil, and control the current passed through the coil by the electric heating device (2) so that the coil is heated until the temperature of the coil reaches a target temperature.

2. The electric heating box according to claim 1, characterized in that: The control device (5) is also used to control the current passed into the coil by the electric heating device (2), so that the coil is heated until the temperature of the coil reaches the target temperature, and then the temperature of the coil is maintained at the target temperature.

3. The electric heating box according to claim 2, characterized in that: The control device (5) is further configured to control the electric heating device (2) to pass a current having a first current value to the coil when the temperature of the coil is lower than the target temperature, so that the temperature of the coil gradually increases; and to control the electric heating device (2) to pass a current having a second current value to the coil when the temperature of the coil is equal to the target temperature, so that the temperature of the coil is maintained at the target temperature, wherein the first current value is greater than the second current value.

4. The electric heating box according to claim 1, characterized in that: The characteristic information includes the current passing through the coil and the voltage difference between the two ends of the coil; The control device (5) is further used to determine the resistance of the coil according to the characteristic information, and to determine the temperature of the coil according to the resistance of the coil.

5. The electric heating box according to claim 1, characterized in that: The box body (1) is provided with a hot air device (3); The hot air device (3) is used to heat the air in the box (1) and to circulate the air in the box (1).

6. The electric heating box according to claim 5, characterized in that: The hot air device (3) comprises a gas passage (31), a driving element (32) and a heating element (33); The gas passage (31) comprises an air inlet (311) and an air outlet (312), and both the air inlet (311) and the air outlet (312) are in communication with the box body (1); The driving member (32) is used to drive the air in the box (1) to flow from the air inlet (311) into the gas passage (31), and to drive the air in the gas passage (31) to flow from the air outlet (312) into the box (1); The heating element (33) is arranged on the inner wall of the gas passage (31) and is used to heat the air flowing through the gas passage (31).

7. The electric heating box according to claim 6, characterized in that: The gas passage (31) is arranged in the box body (1).

8. The electric heating box according to claim 6, characterized in that: In the vertical direction, the air inlet (311) is located above the air outlet (312).

9. The electric heating box according to claim 6, characterized in that: The hot air device (3) also includes a control component; The control element is used to control the heating element (33) to heat the air flowing through the gas passage (31) when the temperature of the coil is less than a temperature threshold, so that the temperature of the air in the box (1) is equal to the target temperature; and to control the heating element (33) to heat the air flowing through the gas passage (31) when the temperature of the coil is equal to the temperature threshold, so that the temperature of the air in the box (1) is equal to the temperature threshold; and to control the heating element (33) to heat the air flowing through the gas passage (31) when the temperature of the coil is greater than the temperature threshold, so that the temperature of the air in the box (1) is positively correlated with the temperature of the coil, wherein the temperature threshold is less than the target temperature.

10. The electric heating box according to claim 1, characterized in that: The electric heating box also includes a transport device (4); The transport device (4) is used to carry the coil and, according to the received action command, drive the coil to move between the inside of the box (1) and the outside of the box (1).

11. The electric heating box according to claim 10, characterized in that: The portion of the electric heating device (2) used for electrical connection with the coil is arranged on the transport device (4).

12. The electric heating box according to any one of claims 1 to 11, characterized in that: The coil is a high voltage coil in a dry-type transformer.

13. The electric heating box according to any one of claims 1 to 11, characterized in that: The target temperature is within a temperature range of 83.5 degrees Celsius to 86.5 degrees Celsius.

14. A control method, characterized in that: include: After the coil is electrically connected to an electric heating device (2) included in the electric heating box and the coil is installed in a box body (1) included in the electric heating box, the electric heating device (2) is controlled to pass current through the coil, and the electric heating device (2) is controlled to send characteristic information of the coil to a control device (5) included in the electric heating box, wherein the box body (1) provides a heat-insulating environment for the coil; The control device (5) receives characteristic information of the coil, determines the temperature of the coil based on the characteristic information of the coil, and controls the electric current passed into the coil by the electric heating device (2) so that the coil is heated until the temperature of the coil reaches a target temperature, wherein the control device (5) is connected to the electric heating device (2).

15. An electronic device (500), characterized in that: include: A processor (502), a communication interface (504), a memory (506) and a bus (508), wherein the processor (502), the communication interface (504) and the memory (506) communicate with each other via the bus (508); The memory (506) is used to store at least one executable instruction, and the executable instruction enables the processor (502) to perform operations corresponding to the method according to claim 14.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, which, when executed by a processor, cause the processor to perform the method of claim 14 .

17. A computer program product, characterized in that The computer program product is tangibly stored on a computer readable medium and includes computer executable instructions that, when executed, cause at least one processor to perform the method of claim 14 .

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