Comprehensive power distribution method and power distribution box

Abstract

The invention relates to the technical field of power distribution, and particularly discloses a novel comprehensive power distribution method and a power distribution box, and the power distribution method comprises the following steps: S1, determining a basic load of a user circuit at a certain time point according to historical power load data; s2, determining an additional load of the user circuit at a certain time point according to the probability model that the additional electric appliance is turned on; and S3, determining the total load of the user circuit according to the basic load and the additional load, and determining the power distribution condition of each user through the total load. According to the novel comprehensive power distribution method and the power distribution box provided by the invention, the power loss can be reduced on the basis of ensuring that a user circuit obtains enough power distribution.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution, and in particular to a comprehensive power distribution method and a distribution box. Background Art

[0002] Rural distribution network refers to the power grid that supplies electricity to towns and rural areas within the county (county-level city). It usually includes distribution substations, high-voltage distribution lines, distribution transformers and low-voltage distribution lines. The characteristics of rural distribution network are wide coverage, long lines, low load density, and often use smaller capacity transformers and serve scattered users.

[0003] At present, rural areas lack devices and methods for accurately distributing power to each user circuit, and cannot reasonably and effectively distribute the load, which leads to a complex structure of the distribution device, increases the cost of the distribution device and is not conducive to management. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a comprehensive power distribution method and a distribution box, wherein the power distribution method is more reasonable and can reduce power loss while ensuring that user circuits are allocated sufficient power.

[0005] The present invention adopts the following technical solution.

[0006] In a first aspect, the present invention provides a comprehensive power distribution method, comprising the following steps: S1. Determine the basic load that must be turned on for the user circuit at a certain point in time based on historical power load data; S2. determining the additional load of the user circuit at a certain point in time according to the probability model of the additional electrical appliances being turned on; S3. Determine the total load of the user circuit according to the basic load and the additional load, and determine the power distribution situation of each user through the total load.

[0007] Preferably, in S2, the method for determining the additional load is as follows: S21, determining the total number of additional electrical appliances that may be turned on in each time period; S22, determining the probability that a certain additional electrical appliance will be turned on in each time period according to a probability model of the additional electrical appliance being turned on; S23. When the probability that the additional electrical appliance will be turned on in each time period is greater than 80%, the load of the additional electrical appliance is included in the additional load, and S22 is repeated until the probability that all the additional electrical appliances will be turned on is determined.

[0008] Preferably, the probability model of the additional electrical appliance being turned on is: , , In the formula, represents the input feature vector, is the intercept term, is the weight coefficient of the input feature vector, , which means that when the feature vector x is input, the probability of the additional appliance being turned on is 1, and z is the intermediate variable.

[0009] Preferably, the probability model that the additional electrical appliance will be turned on further includes: Design a probability loss function, the calculation method of the probability loss function is as follows: , In the formula, represents the true label of samples in a batch, Indicates input and Corresponding The probability value predicted by the probability model that the additional appliance will be turned on when .

[0010] Preferably, the probability model that the additional electrical appliance will be turned on further includes: Optimize weights. The weight optimization method is as follows: , In the formula, represent ; represents the optimized weight, represents the learning rate, Represents the probability loss function The partial derivative of Calculate the accuracy of the j-th iteration of the prediction model as follows: , Where: is the accuracy of the jth iteration, is the number of samples correctly predicted in the jth iteration, is the total number of samples in the jth iteration; According to the accuracy of the prediction model at the jth iteration, adjust the learning rate of the prediction model at the j+1th iteration. The specific adjustment method is as follows: , In the formula, is the learning rate of the prediction model at the j+1th iteration, , is a hyperparameter, The value range is , The value range is .

[0011] In the second aspect, the present invention provides an integrated distribution box, using the aforementioned integrated distribution method, the integrated distribution box comprising: a box body, one side of the box body is provided with an opening, one side of the box body opening is rotatably connected with a cover plate, the cover plate is provided with a lock; a connector, the connector is arranged inside the box body, and is used to connect the transformer; a distributor, the distributor is arranged inside the box body, the distributor is electrically connected to a plurality of user circuits, and the distributor is electrically connected to the connector; a heat dissipation window, the heat dissipation window is arranged on the box body, the heat dissipation window is provided with a plurality of blades arranged at intervals, and the blades are rotatably arranged on the inner walls of the box body on both sides located at the heat dissipation window; a quick interface, the quick interface is arranged on the distributor, and the quick interface is electrically connected to the distributor.

[0012] Preferably, the integrated distribution box also includes: a rotating shaft, which is rotatably arranged on the inner walls on both sides of the box body located at the heat dissipation window, and the rotating shaft is used to install the blades; a gear, which is arranged on the rotating shaft; a rack, which is movably arranged on the box body, and the rack is meshed and connected with several of the gears; a power source, and the output end of the power source is connected to the rack.

[0013] Preferably, at least one end of the rack is provided with a guide portion, and the box body is provided with a guide groove adapted to the guide portion.

[0014] Preferably, the integrated distribution box further includes: a controller, which is electrically connected to the power source; a rain sensor, which is arranged on the outside of the box and is electrically connected to the power source.

[0015] Preferably, the integrated distribution box also includes: at least one fan, at least one of the fans is arranged in the box body, and the fan is electrically connected to the controller; at least two temperature sensors, at least two of the temperature sensors are respectively arranged inside and outside the box body, and at least two of the temperature sensors are electrically connected to the controller.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the comprehensive power distribution method provided by the present invention divides the load of the user circuit into basic complex and additional load, and by analyzing the additional load and basic load of the user circuit, it more accurately estimates the total load at a certain point in time, and distributes power through the total load. On the basis of ensuring that the user circuit obtains sufficient power allocation, the power loss is reduced, and the power distribution method is more reasonable.

[0017] In addition, the present invention also provides an integrated distribution box, which is used to carry all the components in the integrated distribution box by setting a box body, and a cover plate is rotatably set on one side of the box body so that the box body can be opened or closed, and the integrated distribution box is easy to maintain on the basis of ensuring the anti-corrosion, dust-proof and moisture-proof performance of the box body itself. The locker is used to lock the box body and the cover plate. The connector is arranged inside the box body, and is used to connect the transformer. Preferably, the connector is connected to the transformer, and the connector receives the low-voltage electricity transmitted from the transformer and transmits it to the distributor, and the low-voltage electricity is distributed to each user circuit through the distributor. The power distribution process of the farmer user is completed by the integrated distribution box with integrated distributor, and the relevant distribution equipment is integrated in the box body, and the structure is simple. The quick interface is used to connect an external power supply. When the transformer needs to be repaired or overhauled, the external power supply such as a power generation vehicle or a diesel generator is connected through the quick interface to power the user circuit, thereby enhancing the stability of the power supply. The heat dissipation window is used to dissipate heat for the box, and in abnormal weather, such as rain, the blades rotate to close the heat dissipation window, which ensures the heat dissipation performance of the box and prevents rainwater from entering the box to create a safety hazard. By integrating the connector and distributor into the box, it is convenient to centrally manage the distribution equipment and enhance the reliability of the distribution equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of a comprehensive distribution box in the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A part; Figure 3 It is a cross-sectional view of a comprehensive distribution box in the present invention; Figure 4 for Figure 3 A partial enlarged view of part A in the middle.

[0019] In the figure: 1. box body; 2. heat dissipation window; 21. blades; 22. rotating shaft; 23. gear; 3. distributor; 4. cover plate; 5. lock; 6. electrical connection; 7. power source; 8. fan; 9. guide groove; 10. rack; 11. guide part. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0021] Embodiment 1 like Figure 1-4As shown, the present embodiment provides an integrated distribution box, comprising: a box body 1, the box body 1 is roughly rectangular with an opening on one side, and a cover plate 4 is rotatably connected to the open side of the box body 1, and the cover plate 4 is provided with a locking device 5; a connector 6, the connector 6 is arranged inside the box body 1, and is used to connect the transformer; a distributor 3, the distributor 3 is arranged inside the box body 1, the distributor 3 is electrically connected to a plurality of user circuits, and the distributor 3 is electrically connected to the connector 6; a heat dissipation window 2, the heat dissipation window 2 is arranged on the box body 1, and the heat dissipation window 2 is provided with a plurality of blades 21 arranged at equal intervals, and the two ends of the blades 21 are rotatably connected to the inner walls of the box body 1 on both sides located at the heat dissipation window 2, for opening or closing the heat dissipation window; a quick interface 12, the quick interface 12 is arranged on the distributor 3, and the quick interface 12 is electrically connected to the distributor 3.

[0022] Specifically, the box 1 is used to carry all the components in the integrated distribution box. A cover plate 4 is rotatably provided on one side of the box 1, so that the box 1 can be opened or closed. On the basis of ensuring the anti-corrosion, dust-proof and moisture-proof performance of the box 1 itself, the integrated distribution box is easy to maintain. The locker 5 is used to lock the box 1 and the cover plate 4. The connector 6 is arranged inside the box 1, and is used to connect the transformer. The connector 6 receives the low-voltage electricity from the transformer and transmits it to the distributor 3. The low-voltage electricity is distributed to each user circuit through the distributor 3. The power distribution process of rural users is completed through the integrated distribution box with integrated distributor 3. The relevant power distribution equipment is integrated in the box 1, and the structure is simple. The quick interface 12 is used to connect an external power supply. When the transformer needs to be repaired or overhauled, an external power supply such as a power generation vehicle or a diesel generator is connected through the quick interface 12 to power the user circuit, thereby enhancing the stability of the power supply. The heat dissipation window 2 is used to dissipate heat for the box 1, and in abnormal weather, such as rain, the blades 21 rotate to close the heat dissipation window 2, thereby preventing rainwater from entering the box 1 and posing a safety hazard while ensuring the heat dissipation performance of the box 1. By integrating the electrical connector 6 and the distributor 3 into the box 1, centralized management of the power distribution equipment is facilitated, thereby enhancing the reliability of the power distribution equipment.

[0023] The applicant needs to emphasize that the present invention does not involve specific structural improvements to the docking appliance 6 and the distributor 3, and its specific internal structure is not described in detail herein. It should at least include necessary equipment such as power lines, circuit breakers, switch boxes and control boxes, and no specific restrictions are made herein on its specific structure.

[0024] Furthermore, the integrated power distribution box also includes: a plurality of rotating shafts 22 for installing blades 21, the rotating shafts 22 are rotatably arranged between the inner walls of the box body 1 on both sides at the heat dissipation window 2, and the rotating shafts 22 are connected to the blades 21; gears 23, the gears 23 are arranged on the rotating shafts 22; racks 10, the racks 10 are movably arranged on one side of the inner wall of the box body 1 close to the heat dissipation window 2, and the racks 10 are meshed and connected to a plurality of gears 23; power source 7, the output end of the power source 7 is connected to the racks 10. The power source 7 is preferably any one of an electric motor and a motor, and the output end of the power source 7 is preferably connected to a driving gear, and the driving gear is meshed and connected to the racks 10, and the power source 7 drives the racks 10 to move, thereby driving each gear 23 to rotate, driving the rotating shaft 22 to rotate, and then driving the blades 21 to rotate, so as to achieve the purpose of opening or closing the heat dissipation window 2.

[0025] Furthermore, at least one end of the rack 10 is provided with a guide portion 11, and the housing 1 is provided with a guide groove 9 adapted to the guide portion 11. The guide portion 11 and the guide groove 9 are provided to guide the rack 10, thereby preventing the rack 10 from shifting during movement, and ensuring the meshing stability between the rack 10 and each gear 23 and the driving gear.

[0026] Furthermore, the integrated power distribution box also includes: a controller, which is electrically connected to the power source 7; a rain sensor, which is arranged on the outside of the box 1 and is electrically connected to the power source 7. When it rains outside, the controller issues a command to close the heat dissipation window 2 through the power source 7 to prevent rain from entering the inside of the box 1 and affecting the moisture-proof performance of the box 1. Preferably, other abnormal weather sensors are also included, such as snow sensors, hail sensors, etc., to ensure the safety performance of power distribution. The controller is preferably a plc controller.

[0027] Furthermore, the integrated power distribution box also includes: at least one fan 8, at least one fan 8 is arranged in the box body 1, and the fan 8 is electrically connected to the controller; at least two temperature sensors, at least two temperature sensors are arranged inside and outside the box body 1, and at least two temperature sensors are electrically connected to the controller. The switch of the fan 8 is controlled by detecting the temperature inside and outside the box body 1. When the difference between the temperature inside the box body 1 and the temperature outside the box body is greater than 10 degrees Celsius, the heat dissipation window 2 is closed and the fan 8 is also in a closed state. When the difference between the temperature inside the box body 1 and the temperature outside the box body is less than 10 degrees Celsius and greater than 6 degrees Celsius, the heat dissipation window 2 is started to open but the fan 8 is turned off. When the difference between the temperature inside the box body 1 and the temperature outside the box body is less than 6 degrees Celsius, the heat dissipation window 2 is opened and the fan 8 is turned on, so as to save power and avoid a large temperature rise in the box body 1.

[0028] Embodiment 2 The same parts in this embodiment as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0029] This embodiment discloses a comprehensive power distribution method, which uses the new comprehensive power distribution box in the first embodiment. The power distribution method includes the following steps: S1. Based on the historical power load data, determine the basic load that must be turned on in the user circuit at a certain point in time; the basic load refers to the electrical appliances that must be turned on in the user circuit at a certain point in time, which may include light loads, refrigerator loads, optical modem loads, etc., which are almost certain to be turned on at a certain point in time.

[0030] Furthermore, historical power data is generally the power load data of the previous month. The lowest power load at a certain point in time in the previous month is the basic load, which is composed of electrical loads such as light loads, refrigerator loads, optical modem loads, etc., which are almost certain to be turned on at a certain point in time.

[0031] S2. Determine the additional load of the user circuit at a certain point in time based on the probability model of additional electrical appliances being turned on; the additional load is the circuit that the user circuit will turn on at a certain point in time and under specific circumstances, such as air conditioners, computers, televisions, etc.

[0032] S3. Determine the total load of the user circuit based on the basic load and additional load, and determine the power distribution of each user through the total load. By analyzing the additional load and basic load of the user circuit, the total load at a certain point in time can be estimated more accurately, and power distribution is carried out based on the total load, thereby reducing power loss while ensuring that the user circuit is allocated sufficient power.

[0033] Furthermore, in the above S2, the method for determining the additional load is as follows: S21, determining the total number of additional electrical appliances that may be turned on at each time point; Specifically, during the prediction process, it is necessary to count the load types, quantity and power of the user circuit. The load types include: electric lights, refrigerators, air conditioners, computers, televisions, etc.

[0034] S22, determining the probability that a certain additional electrical appliance will be turned on at each time point according to the probability model of the additional electrical appliance being turned on; S23. When the probability that the additional electrical appliance will be turned on at each time point is greater than 80%, the load of the additional electrical appliance is included in the additional load, and S22 is repeated until the probability that all additional electrical appliances will be turned on is determined.

[0035] Furthermore, the probability model of the additional electrical appliance being turned on in step S22 is: , , In the formula, Represents the input feature vector, which contains many elements, including but not limited to time point, indoor temperature, outdoor temperature, humidity, etc. is the intercept term, , which means that when the feature vector x is input, the probability of the additional appliance being turned on is 1; z is the intermediate variable.

[0036] The probability model for additional appliances being turned on also includes: Design a probability loss function. The calculation method of the probability loss function is as follows: , In the formula, represents the true label of samples in a batch, Indicates input and Corresponding The probability value predicted by the probability model that the additional appliance will be turned on when .

[0037] The probability that the additional appliance will be turned on is calculated by: Optimize weights. The weight optimization method is as follows: , In the formula, represents the optimized weight, represents the learning rate, Represents the probability loss function The partial derivative of is solved by the above method , and then by inputting the characteristic vector, the probability that the additional electrical appliance will be turned on under the condition of the characteristic vector can be obtained. The applicant needs to emphasize that it is believed that factors such as temperature and humidity will not change in a short time, and the temperature or humidity of the electricity at a previous time point can be used as the temperature or humidity at the next time point that has not yet arrived.

[0038] Furthermore, the probability model of the additional appliance being turned on also includes: Optimize weights. The weight optimization method is as follows: , In the formula, represent ; represents the optimized weight, represents the learning rate, Represents the probability loss function The partial derivative of Learning Rate It is a key hyperparameter in the probability prediction model of the additional electrical appliances being turned on provided by the present invention, which determines the step size of the prediction model weight update. An appropriate learning rate helps the prediction model to converge quickly, while an inappropriate learning rate may cause the model training to fail. In particular, the computing power of the integrated distribution box in this application is limited. How to adjust the learning rate to help the prediction model greatly save computing power on the basis of successful training is a problem solved by the subsequent steps of the present invention.

[0039] Calculate the accuracy of the j-th iteration of the prediction model as follows: , Where: is the accuracy of the jth iteration, is the number of samples correctly predicted in the jth iteration, is the total number of samples in the jth iteration; According to the accuracy of the prediction model at the jth iteration, adjust the learning rate of the prediction model at the j+1th iteration. The specific adjustment method is as follows: , In the formula, is the learning rate of the prediction model at the j+1th iteration, , is a hyperparameter, The value range is , The value range is .

[0040] The above dynamic adjustment strategy can accelerate the convergence speed of the prediction model in the early stage of training, and make fine adjustments to the prediction model in the later stage of training to avoid stagnation of prediction model learning or oscillation near the optimal solution, ensuring that the prediction model can be trained successfully. Through the above dynamic adjustment strategy, the computing power requirements for the distribution box can be greatly reduced on the basis of ensuring that the prediction model can be trained successfully.

[0041] The beneficial effect of the present invention is that, compared with the prior art, the comprehensive power distribution method provided by the present invention divides the load of the user circuit into basic complex and additional load, and by analyzing the additional load and basic load of the user circuit, it can more accurately estimate the total load at a certain point in time, and distribute power through the total load. On the basis of ensuring that the user circuit obtains sufficient power allocation, the power loss is reduced, and the power distribution method is more reasonable.

[0042] In addition, the present invention also provides an integrated distribution box, which is used to carry all the components in the integrated distribution box by setting a box body, and a cover plate is rotatably set on one side of the box body so that the box body can be opened or closed, and the integrated distribution box is easy to maintain on the basis of ensuring the anti-corrosion, dust-proof and moisture-proof performance of the box body itself. The locker is used to lock the box body and the cover plate. The connector is arranged inside the box body, and is used to connect the transformer. Preferably, the connector is connected to the transformer, and the connector receives the low-voltage electricity transmitted from the transformer and transmits it to the distributor, and the low-voltage electricity is distributed to each user circuit through the distributor. The power distribution process of the farmer user is completed by the integrated distribution box with integrated distributor, and the relevant distribution equipment is integrated in the box body, and the structure is simple. The quick interface is used to connect an external power supply. When the transformer needs to be repaired or overhauled, the external power supply such as a power generation vehicle or a diesel generator is connected through the quick interface to power the user circuit, thereby enhancing the stability of the power supply. The heat dissipation window is used to dissipate heat for the box, and in abnormal weather, such as rain, the blades rotate to close the heat dissipation window, which ensures the heat dissipation performance of the box and prevents rainwater from entering the box to create a safety hazard. By integrating the connector and distributor into the box, it is convenient to centrally manage the distribution equipment and enhance the reliability of the distribution equipment.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A comprehensive power distribution method, characterized in that: The following steps are involved: S1. Determine the basic load of the user circuit at a certain point in time based on historical power load data; S2. determining the additional load of the user circuit at a certain point in time according to the probability model of the additional electrical appliances being turned on; S3. Determine the total load of the user circuit according to the basic load and the additional load, and determine the power distribution situation of each user through the total load.

2. A comprehensive power distribution method according to claim 1, characterized in that: In S2, the method for determining the additional load is as follows: S21, determining the total number of additional electrical appliances that may be turned on in each time period; S22, determining the probability that a certain additional electrical appliance will be turned on in each time period according to a probability model of the additional electrical appliance being turned on; S23. When the probability that the additional electrical appliance will be turned on in each time period is greater than 80%, the load of the additional electrical appliance is included in the additional load, and S22 is repeated until the probability that all the additional electrical appliances will be turned on is determined.

3. A comprehensive power distribution method according to claim 2, characterized in that: The probability model that the additional electrical appliance will be turned on is: ， ， In the formula, represents the input feature vector, is the intercept term, is the weight coefficient of the input feature vector, , which means that when the feature vector x is input, the probability of the additional appliance being turned on is 1, and z is the intermediate variable.

4. A comprehensive power distribution method according to claim 3, characterized in that: The probability model that the additional electrical appliance will be turned on also includes: Design a probability loss function, the calculation method of the probability loss function is as follows: ， In the formula, represents the true label of samples in a batch, Indicates input and Corresponding The probability value predicted by the probability model that the additional appliance will be turned on when .

5. The integrated power distribution method according to claim 3, characterized in that: The probability model that the additional electrical appliance will be turned on also includes: Optimize weights. The weight optimization method is as follows: ， In the formula, represent ; represents the optimized weight, represents the learning rate, Represents the probability loss function The partial derivative of Calculate the accuracy of the j-th iteration of the prediction model as follows: ， Where: is the accuracy of the jth iteration, is the number of samples correctly predicted in the jth iteration, is the total number of samples in the jth iteration; According to the accuracy of the prediction model at the jth iteration, adjust the learning rate of the prediction model at the j+1th iteration. The specific adjustment method is as follows: ， In the formula, is the learning rate of the prediction model at the j+1th iteration, , is a hyperparameter, The value range is , The value range is .

6. An integrated distribution box, using the integrated distribution method according to any one of claims 1 to 5, characterized in that: The integrated distribution box comprises: A box body (1), one side of the box body (1) is provided with an opening, one side of the opening of the box body (1) is rotatably connected to a cover plate (4), and the cover plate (4) is provided with a locking device (5); A connector (6), the connector (6) being arranged inside the box (1) and used for connecting to a transformer; A distributor (3), the distributor (3) being arranged inside the housing (1), the distributor (3) being electrically connected to a plurality of user circuits, and the distributor (3) being electrically connected to the connector (6); A heat dissipation window (2), the heat dissipation window (1) being arranged on the box body (1), the heat dissipation window (2) being provided with a plurality of blades (21) arranged at intervals, the blades (21) being rotatably arranged on two opposite inner walls of the box body (1) located at the heat dissipation window (2); A quick interface (12), the quick interface (12) being arranged on the distributor (3), the quick interface (12) being electrically connected to the distributor (3).

7. The integrated distribution box according to claim 6, characterized in that: The integrated distribution box also includes: A rotating shaft (22), the rotating shaft (22) being rotatably disposed on inner walls of two opposite sides of the housing (1) located at the heat dissipation window (2), the rotating shaft (22) being used to mount the blade (21); a gear (23), the gear (23) being arranged on the rotating shaft (22); A rack (10), the rack (10) being movably disposed on the box (1), the rack (10) being meshedly connected to a plurality of the gears (23); A power source (7), wherein an output end of the power source (7) is connected to the rack (10).

8. The integrated distribution box according to claim 7, characterized in that: At least one end of the rack (10) is provided with a guide portion (11), and the box body (1) is provided with a guide groove (9) adapted to the guide portion (11).

9. The integrated distribution box according to claim 8, characterized in that: The integrated distribution box also includes: A controller, the controller being electrically connected to the power source (7); A rain sensor is arranged outside the box (1), and the rain sensor is electrically connected to the power source (7).

10. The integrated distribution box according to claim 9, characterized in that: The integrated distribution box also includes: at least one fan (8), wherein at least one fan (8) is disposed in the housing (1), and the fan (8) is electrically connected to the controller; At least two temperature sensors, at least two of which are respectively arranged inside and outside the box (1), and at least two of which are electrically connected to the controller.

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