Electrical cabinet temperature control system and electrical cabinet

Abstract

The invention relates to the technical field of electrical equipment, in particular to an electrical cabinet temperature control system and an electrical cabinet, and the system comprises a thermal imaging monitoring module which is used for carrying out the real-time scanning of each electrical element in the electrical cabinet in a non-contact manner, and obtaining a target thermodynamic diagram; the main control module is used for identifying the target thermodynamic diagram, obtaining the current temperature and temperature rise data of the corresponding area of each electrical element, determining an overheating area according to the current temperature and temperature rise data in the area of each electrical element, and outputting a control instruction; and the main control module is further used for controlling the cooling execution module to cool the overheating area according to the control instruction. The problems of low electrical element temperature identification precision, high energy consumption of temperature control equipment, tedious maintenance, high failure rate and the like can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, and in particular to an electrical cabinet temperature control system and an electrical cabinet. BACKGROUND

[0002] Power distribution cabinets, industrial control cabinets and the like are core equipment for power transmission and automatic control. A large amount of heat is generated by electrical components inside the cabinets during operation. If the heat is not dissipated, the temperature will be too high, which will accelerate the aging of insulation and cause short circuits, fires and other serious accidents. The prior art mainly has low accuracy in identifying high temperature components. SUMMARY

[0003] Therefore, the present application provides an electrical cabinet temperature control system and an electrical cabinet, which can effectively solve the problem of low accuracy in identifying the temperature of electrical components.

[0004] In a first aspect, the present application provides an electrical cabinet temperature control system, comprising: a thermal imaging monitoring module configured to perform real-time scanning on each electrical component in the electrical cabinet in a non-contact manner, and obtain a target thermal map; a main control module configured to identify the target thermal map, obtain current temperature and temperature rise data of a region corresponding to each electrical component, determine an overheating region according to the current temperature and temperature rise data in the region of each electrical component, and output a control instruction; The main control module is further configured to control a cooling execution module to cool the overheating region according to the control instruction.

[0005] In some embodiments, the target thermal map comprises an initial thermal map obtained based on each electrical component and a visible light image. The main control module is configured to use an image fusion algorithm to register and superimpose the initial thermal map and the visible light image, and obtain an enhanced thermal map; wherein the enhanced thermal map comprises the contour and temperature information of each electrical component.

[0006] In some embodiments, the thermal imaging monitoring module comprises at least one thermal imager, wherein each thermal imager is provided with a visible light camera arranged coaxially. The thermal imaging monitoring module is specifically configured to perform real-time scanning on each electrical component in the electrical cabinet in a non-contact manner based on each thermal imager, and obtain the initial thermal map. The thermal imaging monitoring module is specifically configured to perform real-time scanning on each electrical component in the electrical cabinet in a non-contact manner based on each thermal imager, and obtain the initial thermal map.

[0007] In some embodiments, the temperature rise data comprises temperature rise acceleration. The main control module is specifically configured to: identify, segment and label each of the electrical elements according to the enhanced heat map, to obtain the type of each of the electrical elements and the corresponding current temperature; perform time series analysis on the historical temperatures of each of the electrical elements at multiple sampling time points to obtain the temperature rise acceleration; The main control module is specifically further configured to: determine a warning level according to the current temperature of the electrical element and the corresponding temperature threshold value of each level and the temperature rise acceleration and the corresponding acceleration threshold value of each level, and issue different kinds of control instructions according to the warning level.

[0008] In some embodiments, the main control module is specifically configured to: issue a first kind of control instruction when the current temperature of the electrical element is greater than the temperature threshold value of the first level and the temperature rise acceleration is less than the acceleration threshold value of the first level; issue a second kind of control instruction when the current temperature of the electrical element is greater than the temperature threshold value of the second level and the temperature rise acceleration is greater than the acceleration threshold value of the first level; issue a third kind of control instruction when the current temperature of the electrical element is greater than the temperature threshold value of the second level and the temperature rise acceleration is greater than the acceleration threshold value of the second level.

[0009] In some embodiments, the main control module is specifically configured to: According to the first kind of control instruction, control the man-machine interface to display warning information, and / or control the audible and visual alarm to output warning information; According to the second kind of control instruction, control the air inlet electromagnetic valve at the air inlet end of the vortex tube in the cooling execution module to open, to cool the overheated area; According to the third kind of control instruction, control the air inlet electromagnetic valve at the air inlet end of the vortex tube in the cooling execution module to open, to cool the overheated area, and send fire warning information to a preset fire control monitoring center; And / or, the system further comprises a compressed air supply module; The compressed air supply module is configured to, when receiving the second kind of control instruction or the third kind of control instruction, extract air and cool and dedust the air to obtain target cold air, and deliver the target cold air to the cooling execution module.

[0010] In some embodiments, the main control module is specifically configured to: control the air inlet opening ratio of the cooling execution module by a PID algorithm according to the current temperature and the target temperature of the overheated area, to adjust the air pressure of the target cold air ejected.

[0011] In some embodiments, the main control module is further configured to: when it is detected that the current ambient humidity is greater than a preset humidity threshold, and / or the current ambient dust concentration is greater than a preset concentration threshold, control the compressed air supply module to deliver air and remove dust to obtain target air, and control the air inlet proportion of the air inlet solenoid valve of the cooling execution module to spray the target air into the electrical cabinet at a preset low pressure value.

[0012] In some embodiments, the system comprises at least one of the following four items: The first item is: The vortex tube in the cooling execution module comprises a cold gas outlet and a hot gas outlet; The cooling execution module further comprises an air inlet solenoid valve arranged at the air inlet of the vortex tube and a hot gas proportioning valve arranged at the hot gas outlet; the hot gas proportioning valve is configured to adjust the proportion of the hot gas flow of the hot gas outlet and the cold gas flow of the cold gas outlet; and the air inlet solenoid valve is configured to adjust the air pressure of the target cold air entering the vortex tube; The second item is: The compressed air supply module comprises a compressor, an air tank, a refrigeration dryer, and an impurity filter; The system further comprises a temperature and humidity sensor and a dust sensor installed inside the electrical cabinet; The third item is: The system further comprises a human-computer interaction module; The human-computer interaction module is configured to display the enhanced heat map, display the current temperature of each type of electrical element, mark and display the overheating area, and display the electrical element corresponding to the overheating area; The fourth item is: The system further comprises a heat recovery circulation module; the heat recovery circulation module comprises a heat collection pipeline, a three-way valve, and a circulation fan; the first end of the three-way valve is connected to the hot gas outlet, the second end of the three-way valve is connected to the heat collection pipeline, and the third end of the three-way valve is directly connected to the external environment; the heat collection pipeline is connected to the refrigeration dryer, the impurity filter, and the circulation fan in sequence; The main control module is further configured to: when the external environment temperature is lower than the internal temperature of the electrical cabinet and the temperature difference is greater than a set value, control the first end and the second end to be conductive, control the refrigeration dryer and the impurity filter to work to process the hot gas flow, and control the circulation fan to send the recovered gas obtained by processing into the internal cavity of the electrical cabinet through the positive pressure pipeline; and when the external environment temperature is greater than the internal temperature of the electrical cabinet, control the first end and the second end to be conductive.

[0013] In the second aspect, the embodiments of the present application provide an electrical cabinet, which comprises a plurality of electrical elements; The electrical cabinet further comprises an electrical cabinet temperature control system according to the first aspect of the present application.

[0014] The embodiments of the present application have the following beneficial effects: In the present application, a thermal imaging monitoring module is used to scan each electrical element in the electrical cabinet in real time by non-contact to obtain a target thermal map; a main control module is used to identify the target thermal map to obtain current temperature and temperature rise data of each electrical element corresponding area, determine an overheating area according to the current temperature and temperature rise data in each electrical element area, and output a control instruction; the main control module is further used to control a cooling execution module to cool the overheating area according to the control instruction. In the present application, the target thermal map is collected by a non-contact device, which does not affect the work of the electrical cabinet, improves the work efficiency of the electrical cabinet, and further determines and identifies the overheating area according to the current temperature and temperature rise data of the electrical element, thereby improving the identification accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 A first structural block diagram of the electrical cabinet temperature control system according to the embodiments of the present application is shown; Figure 2 A structural block diagram of the cooling execution module in the electrical cabinet temperature control system according to the embodiments of the present application is shown; Figure 3 A second structural block diagram of the electrical cabinet temperature control system according to the embodiments of the present application is shown; Figure 4 A structural block diagram of the compressed air supply module in the electrical cabinet temperature control system according to the embodiments of the present application is shown; Figure 5 A third structural block diagram of the electrical cabinet temperature control system according to the embodiments of the present application is shown.

[0017] Main element symbol explanation: 110-thermal imaging monitoring module; 120-main control module; 130-cooling execution module; 140-compressed air supply module; 150-human-computer interaction module; 160-heat recovery circulation module; 131-vortex tube; 132-air inlet; 133-air inlet electromagnetic valve; 134-cold air outlet; 135-hot air outlet; 136-multi-hole nozzle; 141-compressor; 142-gas storage tank; 143-refrigeration dryer; 144-impurity filter. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0019] The components of the embodiments of the present application generally described and illustrated in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0020] Hereinafter, the terms "include", "have", and their conjugates used in various embodiments of the present application are only intended to denote a certain characteristic, number, step, operation, element, component, or combination of the foregoing, and should not be construed as excluding the presence or addition of one or more other characteristics, numbers, steps, operations, elements, components, or combinations thereof. In addition, the terms "first", "second", "third", and the like are used only to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present application belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized or overly formal meaning, unless clearly defined in various embodiments of the present application.

[0022] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0023] In the prior art, there are also the following problems: Temperature measurement method is backward: contact type point sensor is mostly used, and there is a monitoring blind area, which cannot be globally perceived.

[0024] Cooling means is inefficient: the fan has low heat dissipation efficiency and is easy to introduce dust; the air conditioner has high energy consumption, large volume, needs maintenance and has condensate water risk.

[0025] Early warning mode lags behind: traditional alarm is based on absolute temperature threshold, which cannot identify temperature rise rate anomaly and cannot realize early fire warning.

[0026] The temperature control device has problems of large energy consumption, complicated maintenance and high failure rate, especially in an environment with more dust.

[0027] The electrical cabinet temperature control system will be described below in combination with some specific embodiments.

[0028] Figure 1 A structural block diagram of the electrical cabinet temperature control system of the embodiment of the present application is shown. Exemplarily, the electrical cabinet temperature control system includes a thermal imaging monitoring module 110, a main control module 120 and a cooling execution module 130. The main control module 120 is communicatively connected to the thermal imaging monitoring module 110, and is control-connected to the cooling execution module 130. The main control module 120 includes, but is not limited to, a preset processor.

[0029] The thermal imaging monitoring module 110 is configured to perform real-time scanning on each electrical element in the electrical cabinet based on non-contact, to obtain a target thermal map. The scanning field of view of the thermal imaging monitoring module 110 covers all electrical elements.

[0030] The embodiment of the present application adopts non-contact acquisition of the target thermal map of each electrical element in the electrical cabinet, and non-contact measurement of the thermal information of each electrical element, which can not interfere with the operation of each electrical element in the electrical cabinet.

[0031] The electrical cabinet includes, but is not limited to, a control cabinet, an intelligent cabinet, a power distribution cabinet and the like. The electrical cabinet includes a plurality of electrical elements.

[0032] The electrical element includes, but is not limited to, an electrical element in the electrical cabinet that generates heat, for example, each electrical element includes a busbar, a circuit breaker, a contactor, a wiring terminal block and all heat generating elements.

[0033] The target thermal map includes temperature and shape information of each electrical element. A color image generated by mapping the temperature value in the infrared image through a pseudo-color palette facilitates the identification of temperature difference. Understandably, the color in the target thermal map has a clear mapping relationship with the temperature.

[0034] Exemplarily, the thermal imaging monitoring module 110 is configured to obtain a target thermal map by using a thermal imager to scan each electrical element in the electrical cabinet in real time based on non-contact. The thermal imaging monitoring module 110 includes at least one thermal imager, which is installed in the electrical cabinet, for example, is fixedly installed on the top center or side of the electrical cabinet by a universal support, and has a field of view covering each electrical element in the electrical cabinet. The thermal imager is connected to the main control module 120 through an Ethernet cable. For example, the thermal imager is installed in the middle of the top wall of the electrical cabinet shell to observe each target electrical element at an optimal viewing angle, so as to ensure that the field of view (FOV) can cover all key heating element regions such as busbar, circuit breaker, contactor, and terminal block without dead angle. The electrical cabinet shell is a metal shell with a protection level of not less than IP67. For example, the thermal imager is an industrial infrared thermal imager using a non-cooled vanadium oxide (VOx) or polysilicon detector, which has a spectral response range of 8-14 μm and can accurately capture the thermal radiation of the surface of an object. The target thermal map is obtained based on the infrared image obtained by scanning the infrared thermal imager, for example, the temperature value in the infrared image is mapped to generate the target thermal map by using a pseudo-color palette.

[0035] The main control module 120 is configured to identify the target thermal map, obtain current temperature and temperature rise data of each electrical element corresponding region, determine an overheating region according to the current temperature and temperature rise data in each electrical element region, and output a control instruction.

[0036] The main control module 120 is further configured to control the cooling execution module 130 to cool the overheating region according to the control instruction. It can be understood that the cooling execution module 130 of the embodiment of the present application can cool each electrical element.

[0037] In an embodiment, in order to overcome the problems of low accuracy of the infrared image of the infrared thermal imager and low clarity of the element contour, the target thermal map includes an initial thermal map and a visible light image.

[0038] The main control module 120 is configured to register and superimpose the initial thermal map and the visible light image by using an image fusion algorithm to obtain an enhanced thermal map; wherein the enhanced thermal map includes the contour and temperature information of each electrical element.

[0039] Specifically, when the main control module 120 registers and superimposes the initial thermal map and the visible light image by using the image fusion algorithm, it is specifically configured to implement the following steps: S121, synchronously acquiring an infrared image and a visible light image of each electrical element in the electrical cabinet.

[0040] S122, the infrared image and the visible light image are respectively subjected to denoising and contrast enhancement processing to improve image quality and reduce interference factors. For example, the processing performed on the infrared image includes removing fixed pattern noise, median filtering to remove salt and pepper noise, histogram equalization to enhance contrast, etc. The processing performed on the visible light image includes white balance correction, adaptive histogram equalization, edge sharpening, etc. S123, the scale-invariant feature transform algorithm is used to extract key feature points of the processed infrared image and visible light image, and the RANSAC algorithm is used to calculate the spatial transformation matrix H to achieve spatial registration.

[0041] Since the infrared image reflects temperature distribution and the visible light image reflects texture and color, the two images are different in modalities and cannot be directly registered using the gray correlation method, so a cross-modal feature extraction and matching algorithm needs to be used. The SIFT (Scale-Invariant Feature Transform) + RANSAC algorithm can be used in the embodiments of the present application to remove false matching point pairs, thereby obtaining the optimal homography matrix (Homography Matrix) H, i.e., the spatial transformation matrix H.

[0042] The embodiments of the present application can also use a deep learning method, use a pre-trained Siamese network or CNN feature extractor to extract features, and establish a corresponding relationship between the heterogeneous images to obtain the spatial transformation matrix H.

[0043] S124, the infrared image is mapped to the coordinate system of the visible light image according to the spatial transformation matrix H to achieve strict alignment. Perspective transformation is performed on the infrared image to achieve pixel-level registration with the visible light image.

[0044] In addition, for a fixed installation system, the spatial transformation matrix H can be pre-stored after one-time calibration, and directly called during operation, thereby saving computing resources.

[0045] S125, the Laplacian pyramid decomposition and the maximum value rule are used to generate a fusion image (enhanced heat map) to obtain a composite image in which the element contour is clear and the temperature anomaly can be accurately displayed.

[0046] The registered visible light image and infrared image are subjected to N-layer Laplacian decomposition; on each layer, the maximum value rule (Max-Laplacian) is used to merge the coefficients; and finally, reconstruction is performed to obtain a fusion image (enhanced heat map).

[0047] In this way, by fusing the infrared image and the visible light image, the rich spatial details (such as element number, label, and structure form) of the visible light image can be retained, and the temperature information of the infrared image can be superimposed, so that the element and the temperature information can be easily identified from the enhanced heat map, i.e., the "Xth row and Yth terminal are overheating" can be clearly identified, instead of only seeing a high-temperature color block.

[0048] Further, the thermal imaging monitoring module 110 further comprises a visible light camera, for example, a high-definition visible light camera. Illustratively, each thermal imager is configured with a visible light camera, and the visible light camera is coaxially arranged with the thermal imager.

[0049] It can be understood that the thermal imaging monitoring module 110 is specifically configured to: obtain an initial thermal map by each thermal imager based on non-contact real-time scanning of each electrical element in the electrical cabinet; and obtain a visible light image by non-contact photographing of each electrical element in the electrical cabinet by the visible light camera.

[0050] In addition, it should be noted that the thermal imager and the corresponding visible light camera constitute a coaxial dual-optical-path imaging system. In order to ensure that the subsequent images can be aligned, first, the spatial consistency of the two images needs to be ensured in the physical structure. For example, the thermal imager and the corresponding visible light camera adopt a common aperture or coaxial integrated design: the thermal imager and the visible light camera adopt a common lens window or are rigidly fixed on the same bracket, and the optical axes are parallel or nearly coincident; and the field of view (FOV) of the thermal imager and the visible light camera needs to be matched: a thermal imager and a visible light camera with similar field of view are selected to ensure that their coverage areas are basically consistent. The thermal imager and the visible light camera need to be triggered synchronously: the main control module 120 sends a collection signal uniformly to make the thermal imager and the visible light camera expose at the same time, so as to avoid the dislocation of moving objects caused by time difference. For example, an industrial-grade infrared thermal imager with a visible light auxiliary channel can be used, which has integrated a coaxial visible light camera inside and outputs double-flow data that have been preliminarily aligned.

[0051] In one embodiment, in order to timely warn the parties, the temperature rise data includes temperature rise acceleration.

[0052] The main control module 120 is specifically configured to identify, segment, and label each electrical element according to the enhanced thermal map by using the trained thermal identification model, to obtain the type of each electrical element and the corresponding current temperature and element area temperature distribution thermal map; and perform time series analysis on the historical temperature of each electrical element at multiple sampling times to obtain the temperature rise acceleration.

[0053] The main control module 120 comprises an image processing unit; specifically, the image processing unit identifies, segments, and labels each electrical element according to the enhanced thermal map by using the trained thermal identification model, to obtain the current temperature and element area temperature distribution thermal map of each electrical element, and performs time series analysis on the historical temperature of each electrical element at multiple sampling times to obtain the temperature rise acceleration.

[0054] The thermal recognition model includes, but is not limited to, a CNN convolutional neural network based on a deep learning framework such as TensorFlow Lite. The thermal recognition model is trained by a large number of infrared images obtained by scanning the electrical components in the electrical cabinet. The thermal recognition model can automatically recognize, segment, and label various electrical components, and output the maximum temperature, average temperature, regional temperature distribution thermal map, and temperature gradient data of each electrical component in real time. The main control module 120 can also track historical data and draw a temperature-time curve of a specific point.

[0055] The main control module 120 is specifically configured to determine a warning level according to the current temperature of the electrical component and the temperature threshold value of each corresponding level and the temperature rise acceleration and the acceleration threshold value of each corresponding level, and issue different types of control instructions according to the warning level.

[0056] The main control module 120 further includes a warning control unit. The warning control unit determines a warning level according to the current temperature of the electrical component and the temperature threshold value of each level and the temperature rise acceleration and the acceleration threshold value of each level, and issues different types of control instructions according to the warning level.

[0057] In the embodiments of the present application, each electrical component is provided with its own multi-level temperature threshold value and multi-level acceleration threshold value according to the properties of different electrical components. After the electrical component is recognized by the thermal recognition model, the corresponding multi-level temperature threshold value and level acceleration threshold value are obtained according to the recognized electrical component.

[0058] Exemplarily, the levels of the temperature threshold value include a first level and a second level; and the levels of the acceleration threshold value include a first level and a second level. The main control module 120 is specifically configured to: S125, when the current temperature of the electrical component is greater than the temperature threshold value of the first level and the temperature rise acceleration is less than the acceleration threshold value of the first level, determining that the warning level is a first-level warning, and issuing a first type of control instruction. The temperature threshold value of the first level is an initial warning threshold T1, which is used to trigger an alarm to alert the user that the heat of the electrical cabinet is high; for example, T1 = 65℃. The temperature threshold value of the second level is an action threshold T2, which is used to trigger an alarm and start active cooling; for example, T2 = 75℃. The temperature threshold value of the third level is a danger threshold T3, which is used to trigger the safety shutdown of the electrical cabinet and notify the fire department to take measures; for example, T3 = 110℃. The acceleration threshold value of the first level is a local alarm threshold K1; and the acceleration threshold value of the second level is a fire characteristic acceleration threshold K2.

[0059] It can be understood that the first type of control instruction is used to trigger a warning information. The warning information includes warning information displayed through a human-machine interface or warning information issued through an audible and visual alarm.

[0060] The main control module 120 is also used for: According to the first type of control command, the human-machine interface is controlled to display warning information, and the audible and visual alarm is controlled to output warning information. The human-machine interface is located on the door of the electrical cabinet.

[0061] S126, if the current temperature of the electrical component exceeds the second-level temperature threshold and the temperature rise acceleration exceeds the first-level acceleration threshold, the warning level is determined to be a second-level warning, and a second-type control command is issued. Further, the main control module 120 is also specifically used to control the air intake solenoid valve at the air inlet end of the cooling execution module 130 to open, according to the second-type control command, to cool the overheated area. Specifically, the main control module 120 adjusts the orientation of the jet nozzle in the cooling execution module 130 according to the coordinates of the overheated area, and controls the jet nozzle to eject dust-free cold air according to the current temperature and target temperature of the overheated area.

[0062] S127, if the current temperature of the electrical component exceeds the second-level temperature threshold and the temperature rise acceleration exceeds the second-level acceleration threshold, the warning level is determined to be a third-level warning, and a third-type control command is issued. Further, the main control module 120 is also specifically used for: According to the third type of control command, the cooling execution module 130 is controlled to cool the overheated area and send fire warning information to the preset fire monitoring center. Among them, if the temperature rise acceleration is greater than K2 and the current temperature exceeds the safety baseline, it is determined that it meets the early characteristics of an electrical fire, and the highest level fire warning signal is immediately sent to the plant fire monitoring center.

[0063] The warning level is determined by ANDing the current temperature and temperature rise acceleration of the target electrical component. For example, the highest level fire warning is triggered only if the current temperature of an electrical component is greater than T3 and the temperature rise acceleration is greater than K2 (the fire characteristic acceleration threshold). This greatly reduces false alarms caused by instantaneous thermal interference.

[0064] Exemplary, such as Figure 2 As shown, the cooling execution module 130 includes a vortex tube 131; the vortex tube 131 includes an air inlet 132, an air inlet solenoid valve 133, a cold air outlet 134, and a hot air outlet 135; a perforated nozzle 136 is provided at the cold air outlet 134. Exemplarily, the hot air generated by the vortex tube 131 is discharged from the hot air outlet 135 and guided to the outside of the electrical cabinet through a pipe wrapped with heat-insulating material to prevent heating the environment inside the cabinet. The output of the main control module 120 is connected to the start / stop controller of the compressor (air compressor) via a control cable.

[0065] The air inlet 132 of the cooling execution module 130 is connected with the compressed air supply module 140 through a pipeline, and a multi-hole nozzle 136 is arranged at the cold air outlet end of the cooling execution module 130 and is aligned with the preset cooling area inside the electrical cabinet, for receiving compressed air and generating a low-temperature cold air flow to perform directional jet cooling on the electrical cabinet; and the hot end air outlet is used for discharging high-temperature air flow.

[0066] The cold air outlet end of the cooling execution module 130 (for example, a vortex tube cooling execution module) is connected with a micro stepping motor, and the multi-hole nozzle 136 is driven by the micro stepping motor to move up and down along the electrical cabinet. The main control module 120 can dynamically adjust the moving range of the multi-hole nozzle 136 according to the position of the overheated area identified by the thermal imaging monitoring module 110. Exemplarily, the length of the multi-hole nozzle 136 can also cover all electrical elements, thereby reducing the adjustment steps of moving up and down.

[0067] The cooling execution module 130 is the “high-efficiency executor” of the system. The core of the cooling execution module 130 is a vortex tube 131, and the working principle of the vortex tube 131 is based on the Ranque-Hilsch Effect. After the high-pressure gas is tangentially injected into the vortex chamber, a high-speed free vortex is formed, the central gas flow has high angular velocity and large kinetic energy, and the kinetic energy and thermal energy are exchanged with the peripheral gas flow, and finally separated into a low-temperature cold air flow and a high-temperature hot air flow. The low-temperature cold air flow is sprayed out through the cold air outlet 134, and the high-temperature hot air flow is sprayed out through the hot air outlet 135.

[0068] As can be understood, as shown in Figure 3 , the system further includes a compressed air supply module 140.

[0069] The compressed air supply module 140 is used for extracting air and cooling and dedusting the air to obtain target cold air and delivering the target cold air to the cooling execution module 130 when receiving the second type of control instruction or the third type of control instruction.

[0070] As shown in Figure 4 , in order to improve the efficiency of the cooling means, the compressed air supply module 140 includes a compressor 141, an air tank 142, a refrigeration dryer 143, and an impurity filter 144. Exemplarily, the compressor 141 (air compressor) is connected with the air tank 142, the air tank 142 is connected with the refrigeration dryer 143 through a stainless steel pipeline; the refrigeration dryer 143 is connected with the impurity filter 144; and the impurity filter 144 is connected with the cooling execution module 130 through a stainless steel pipeline, so as to introduce the target cold air into the electrical cabinet.

[0071] The compressed air supply module 140 is configured to draw air by controlling the compressor 141, and cool and de-dust the air by controlling the refrigerated dryer 143 and the impurity filter 144 to obtain the target cold air when receiving the second type of control instruction or the third type of control instruction.

[0072] Exemplarily, if the electrical element continues to generate heat due to poor contact, the temperature rapidly rises to 78℃ (>T2). The main control module 120 immediately controls the compressor 141 to start (if the pressure of the air tank 142 is insufficient), and controls the refrigerated dryer 143 and the impurity filter 144 to draw cold air.

[0073] The cooling execution module 130 further comprises an air inlet pressure regulating valve arranged at the air inlet 132 of the vortex tube, and a hot gas proportion regulating valve arranged at the hot gas outlet 135. The hot gas proportion regulating valve is configured to regulate the proportion of the hot gas flow and the cold gas flow.

[0074] The main control module 120 is specifically configured to control the opening proportion of the air inlet electromagnetic valve 133 in the cooling execution module 130 according to the current temperature of the overheated area and the target temperature of the overheated area by a PID algorithm, so as to control the air pressure of the target cold air sprayed.

[0075] The dynamic adjustment process of the air inlet electromagnetic valve 133 comprises: dry high-pressure air (for example, 0.6 MPa) flows into the vortex tube 131, and cold gas at about -5℃ is sprayed out through the cold gas outlet 134 and directly impacts the terminal in the overheated area. The thermal imager detects the real-time current temperature c(t), and the current temperature c(t) is compared with the set target temperature r(t) to obtain a temperature difference e(t). The main control module 120 calculates a control amount u(t) (for example, a 4-20 mA signal) according to the proportional term, the integral term and the differential term of the temperature difference e(t), and reversely controls the opening proportion of the air inlet electromagnetic valve 133 by using the control amount u(t) to adjust the compressed air pressure supplied to the vortex tube 131. For example, when the temperature difference is large, the output control amount u(t) is maximum, the opening proportion is fully open, and 0.6 MPa full-pressure cooling is provided; when the current temperature decreases and the temperature difference decreases, the output control amount u(t) decreases, the opening proportion decreases, and the supply pressure decreases to 0.4 MPa, and the cooling intensity is accordingly and smoothly weakened. Thus, supercooling can be avoided, and energy consumption can be saved.

[0076] It can be understood that the cooling execution module 130 further comprises the air inlet electromagnetic valve 133. The air inlet pressure regulating valve is arranged at the air inlet 132 of the vortex tube 131. The air pressure of the target cold air sprayed is controlled by adjusting the opening proportion of the air inlet electromagnetic valve 133. The main control module 120 is specifically configured to adjust the air inlet pressure regulating valve to control the air pressure entering the vortex tube 131 according to the current temperature of the overheated area and the target temperature of the overheated area.

[0077] Specifically, the target cold air is introduced into the electrical cabinet through a stainless steel pipeline, and is connected to the cooling execution module 130. As shown in Figure 2 The core of the cooling execution module 130 is an aluminum vortex tube 131. The target cold air enters the vortex tube 131 tangentially from the air inlet 132 to form a high-speed vortex. By adjusting the conical valve at the end of the vortex tube 131, the proportion of cold and hot air flow can be controlled. In this embodiment, the proportion is adjusted to 70% of the air flow as cold air flow. The cold air flow temperature can be reduced from 30°C of the inlet air temperature to about -5°C, and is guided out from the cold air flow outlet 134. The cold air flow outlet 134 is connected to a fluorine-free plastic hose, and a porous nozzle 136 driven by a stepping motor is installed at the end of the fluorine-free plastic hose. The initial default direction of the porous nozzle 136 is aligned with the busbar connection.

[0078] In an embodiment, the main control module 120 is further configured to: In a case where it is detected that the current ambient humidity is greater than the preset humidity threshold, the main control module 120 controls the compressed air supply module 140 to deliver air and remove dust to obtain target air, and controls the air inlet proportion of the air inlet electromagnetic valve 133 of the cooling execution module 130 to spray the target air into the electrical cabinet at a preset low pressure value.

[0079] The main control module 120 is further configured to: In a case where it is detected that the current ambient dust concentration is greater than the preset concentration threshold, the main control module 120 controls the compressed air supply module 140 to deliver air and remove dust to obtain target air, and controls the air inlet proportion of the air inlet electromagnetic valve 133 of the cooling execution module 130 to spray the target air into the electrical cabinet at a preset low pressure value.

[0080] It can be understood that the system further comprises a temperature and humidity sensor and a dust sensor installed in the electrical cabinet. The temperature and humidity sensor is configured to detect the current ambient humidity in the electrical cabinet, and the dust sensor is configured to detect the current ambient dust concentration in the electrical cabinet. The temperature and humidity sensor and the dust sensor are both communicatively connected to the main control module 120. The main control module 120 collects the current ambient humidity through the temperature and humidity sensor and collects the current ambient dust concentration through the dust sensor. For example, whenever the main control module 120 detects that the current ambient humidity exceeds 75% RH, even if the temperature is normal, the main control module 120 will start the air inlet electromagnetic valve 133 at a low pressure (0.3 MPa) to blow dry cold air into the cabinet at a regular time (for example, 5 minutes per hour) to effectively reduce the humidity of the air in the cabinet and prevent condensation. Similarly, when the dust concentration exceeds the standard, the blowout mode can also be started to keep the cabinet clean.

[0081] In an embodiment, as shown in Figure 5As shown, the system further comprises a human-computer interaction module 150. The human-computer interaction module 150 is communicatively connected with the main control module 120, and is configured to set system parameters, display states, and provide over-temperature early warning. Meanwhile, the main control module 120 is further connected with an audible and visual alarm. The human-computer interaction module 150 comprises a touch screen human-computer interface.

[0082] The human-computer interaction module 150 is configured to display an enhanced thermal map, display current temperatures of electrical elements of various types, mark and display over-temperature areas, and display electrical elements corresponding to the over-temperature areas. The color infrared thermal image, the current temperatures of the electrical elements, the system state (pressure, flow), the alarm log, and the like are displayed in real time through the touch screen human-computer interface.

[0083] In an embodiment, when the compressed air supply module supplies multiple electrical cabinets at the same time, in order to save energy and improve the dustproof level, as shown, Figure 5 As shown, the embodiment of the present application further comprises a heat recovery circulation module 160.

[0084] The heat recovery circulation module 160 comprises a heat collection pipeline, a three-way valve, and a circulation fan. The first end of the three-way valve is connected with the hot gas flow outlet 135, the second end of the three-way valve is connected with the heat collection pipeline, and the third end of the three-way valve is directly connected with the external environment. The heat collection pipeline is sequentially connected with the refrigerated dryer 143, the impurity filter 144, and the circulation fan. In order to save costs, the refrigerated dryer 143 and the impurity filter 144 at this position are shared with the compressed air supply module 140. The refrigerated dryer 143 is configured to cool the hot gas flow from the hot gas flow outlet 135. The impurity filter 144 is configured to filter impurities. The circulation fan is configured to pump the recovered gas obtained after the hot gas flow is processed into the electrical cabinet, and is connected with the inner cavity of the electrical cabinet through the positive pressure pipeline to establish a micro-positive pressure and prevent dust from entering.

[0085] The main control module 120 is control-connected with the heat recovery circulation module 160. Specifically, the main control module 120 controls the conduction direction of the three-way valve, especially the conduction of the second end and the third end. The main control module 120 determines the conduction direction of the three-way valve according to the internal temperature of the electrical cabinet and the external environment temperature. Demonstratively, the main control module 120 is further configured to: when the external environment temperature is lower than the internal temperature of the electrical cabinet and the temperature difference is greater than a set value, control the first end and the second end to be conductive, control the refrigerated dryer 143 and the impurity filter 144 to work to process the hot gas flow, and control the circulation fan to send the recovered gas obtained after the processing into the inner cavity of the electrical cabinet through the positive pressure pipeline to improve the energy saving effect; when the external environment temperature is greater than the internal temperature of the electrical cabinet, control the first end and the second end to be conductive to directly release the hot gas flow.

[0086] Compared with the prior art, the present application has the following advantages: The application can monitor comprehensively and without dead angles: the thermal imaging technology realizes global temperature visualization, and the accuracy of identifying over-temperature areas and corresponding electrical elements is improved through fusion with visible light images.

[0087] Efficient and accurate cooling: the vortex tube 131 cools the flow directionally, responds quickly, and is efficient.

[0088] High safety and reliability: no refrigerant, no moving parts, maintenance-free, and resistant to harsh environments.

[0089] Energy recycling: heat recovery design turns waste into treasure, reduces compressor energy consumption, and assists in cooling and dust prevention.

[0090] Revolutionary early fire warning: through temperature rise data analysis to identify temperature change acceleration, realize electrical fire super-early warning, and information is accurate and rich.

[0091] The application also provides an electrical cabinet. Exemplarily, the electrical cabinet includes a plurality of electrical elements. The electrical cabinet also includes an electrical cabinet temperature control system according to an embodiment of the application.

[0092] It can be understood that the electrical cabinet of the embodiment corresponds to the electrical cabinet temperature control system of the above-mentioned embodiment, and the optional items in the above-mentioned embodiment are also applicable to the embodiment, so they will not be described again here.

[0093] The application also provides a terminal device. Exemplarily, the terminal device includes a processor and a memory. The memory stores a computer program. The processor runs the computer program, so that the terminal device performs the functions of each module in the above-mentioned electrical cabinet temperature control system.

[0094] The processor can be an integrated circuit chip with signal processing capability. The processor can be a general-purpose processor, including a central processing unit (CPU), a graphics processing unit (GPU), and a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or at least one of them. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can implement or execute the disclosed methods, steps, and logic block diagrams in the embodiments of the application.

[0095] The memory can be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), and the like. Among them, the memory is used to store a computer program, and the processor can execute the computer program correspondingly after receiving an execution instruction.

[0096] The application further provides a computer readable storage medium for storing the computer program used in the terminal device. For example, the computer readable storage medium can include, but is not limited to, a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0097] In several embodiments provided in the application, it should be understood that the disclosed apparatus and method can also be implemented by other ways. The apparatus embodiments described above are only schematic, for example, the flow chart and block diagram in the drawings show the possible implementation architecture, function and operation of the apparatus, method and computer program product according to the embodiments of the application. In this regard, each block in the flow chart or block diagram can represent a module, a program segment or a part of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that, in alternative implementation ways, the functions noted in the block can also occur in different order from that noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the structural diagram and / or flow chart, and the combination of blocks in the structural diagram and / or flow chart, can be implemented by a special hardware-based system for executing the specified function or action, or can be implemented by a combination of special hardware and computer instructions.

[0098] In addition, each functional module or unit in the embodiments of the application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0099] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0100] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application.

Claims

1. An electrical cabinet temperature control system, characterized by, The application relates to a thermal imaging monitoring system for an electrical cabinet. The system comprises: a thermal imaging monitoring module configured to scan each electrical component in the electrical cabinet in real time in a non-contact manner to obtain a target thermal image; a main control module configured to identify the target thermal image to obtain current temperature and temperature rise data of each electrical component region, determine an overheating region according to the current temperature and temperature rise data of each electrical component region, and output a control instruction; 2. The electrical cabinet temperature control system of claim 1, wherein, the main control module is further configured to control a cooling execution module to cool the overheating region according to the control instruction. The target thermal image comprises an initial thermal image obtained based on each electrical component and a visible light image; 3. The electrical cabinet temperature control system of claim 2, wherein, the main control module is configured to use an image fusion algorithm to register and superimpose the initial thermal image and the visible light image to obtain an enhanced thermal image; wherein the enhanced thermal image comprises the contour and temperature information of each electrical component. The thermal imaging monitoring module comprises at least one thermal imager, wherein each thermal imager is provided with a visible light camera arranged coaxially; the thermal imaging monitoring module is specifically configured to scan each electrical component in the electrical cabinet in real time in a non-contact manner based on each thermal imager to obtain the initial thermal image; 4. The electrical cabinet temperature control system of claim 2, wherein, the visible light camera is used to take pictures of each electrical component in the electrical cabinet in a non-contact manner to obtain the visible light image. The temperature rise data comprises a temperature rise acceleration; the main control module is specifically configured to: use a trained thermal identification model to identify, segment and label each electrical component based on the enhanced thermal image to obtain the type and corresponding current temperature of each electrical component; and perform time series analysis on the historical temperature of each electrical component at multiple sampling moments to obtain the temperature rise acceleration; 5. The electrical cabinet temperature control system of claim 4, wherein, the main control module is further specifically configured to determine an early warning level according to the current temperature of each electrical component, the corresponding temperature threshold value of each level and the temperature rise acceleration and the corresponding acceleration threshold value of each level, and output different kinds of control instructions according to the early warning level. the main control module is specifically configured to: output a first kind of control instruction when the current temperature of each electrical component is greater than the temperature threshold value of a first level and the temperature rise acceleration is less than the acceleration threshold value of the first level; output a second kind of control instruction when the current temperature of each electrical component is greater than the temperature threshold value of a second level and the temperature rise acceleration is greater than the acceleration threshold value of the first level; 6. The electrical cabinet temperature control system of any of claims 2-5, wherein, output a third kind of control instruction when the current temperature of each electrical component is greater than the temperature threshold value of the second level and the temperature rise acceleration is greater than the acceleration threshold value of the second level. the main control module is specifically configured to: control a man-machine interface to display early warning information and / or control a solenoid valve at the air inlet end of a MHD generator in the cooling execution module to open to cool the overheating region according to the second kind of control instruction; According to the third type of control instruction, the intake solenoid valve at the intake end of the vortex tube in the cooling execution module is controlled to open, so as to cool the overheated area, and fire warning information is sent to a preset fire monitoring center; And / or, the system further comprises a compressed air supply module; The compressed air supply module is configured to, when receiving the second type of control instruction or the third type of control instruction, extract air and cool and de-dust the air to obtain target cold air, and deliver the target cold air to the cooling execution module.

7. The electrical cabinet temperature control system of claim 6, wherein, The main control module is specifically configured to: control the intake opening ratio of the cooling execution module according to the current temperature and the target temperature of the overheated area by a PID algorithm, so as to adjust the air pressure of the target cold air ejected.

8. The electrical cabinet temperature control system of claim 7, wherein, The main control module is further configured to: When it is detected that the current environmental humidity is greater than a preset humidity threshold, and / or the current environmental dust concentration is greater than a preset concentration threshold, the main control module controls the compressed air supply module to deliver air and de-dust to obtain target air, and controls the intake ratio of the intake solenoid valve of the cooling execution module, so as to eject the target air into the electrical cabinet at a preset low pressure value.

9. The electrical cabinet temperature control system of claim 8, wherein, The system comprises at least one of the following four items: The first item: The vortex tube in the cooling execution module further comprises a cold gas outlet and a hot gas outlet; The cooling execution module further comprises an intake solenoid valve arranged at the intake end of the vortex tube and a hot gas ratio adjusting valve arranged at the hot gas outlet; the hot gas ratio adjusting valve is configured to adjust the ratio of the hot gas flow at the hot gas outlet and the cold gas flow at the cold gas outlet; and the intake solenoid valve is configured to adjust the air pressure of the target cold air entering the vortex tube; The second item: The compressed air supply module comprises a compressor, an air tank, a refrigeration dryer and an impurity filter; The system further comprises a temperature and humidity sensor and a dust sensor installed inside the electrical cabinet; The third item: The system further comprises a human-computer interaction module; The human-computer interaction module is configured to display the enhanced heat map, display the current temperatures of various types of electrical elements, mark and display the overheated area, and display the electrical element corresponding to the overheated area; The fourth item: The system further comprises a heat recovery circulation module; the heat recovery circulation module comprises a heat collecting pipeline, a three-way valve and a circulating fan; a first end of the three-way valve is connected to the hot gas outlet, a second end of the three-way valve is connected to the heat collecting pipeline, and a third end of the three-way valve is directly connected to an external environment; the heat collecting pipeline is connected to the refrigeration dryer, the impurity filter and the circulating fan in sequence; The main control module is further configured to: when the temperature of the external environment is lower than the temperature inside the electrical cabinet and the temperature difference is greater than a set value, control the first end and the second end to be conductive, control the refrigeration dryer and the impurity filter to work to process the hot gas flow, and control the circulating fan to send the recovered gas obtained by processing through the positive pressure pipeline into the inner cavity of the electrical cabinet; when the temperature of the external environment is greater than the temperature inside the electrical cabinet, control the first end and the second end to be conductive.

10. An electrical cabinet, characterized in that The electrical cabinet comprises a plurality of electrical elements; The electrical cabinet further comprises an electrical cabinet temperature control system as claimed in any of claims 1-9.

Images